Refining slag and method for refining molten steel

The invention relates to refining slag and a method for refining molten steel, which belong to the field of metallurgy. The technical problem solved by the invention is to provide the refining slag which has the advantages of reducing the impurity content of the molten steel such as cord thread steel and the like and improving the cleanliness of the molten steel. The refining slag comprises the following components in part by weight: 40 to 50 parts of calcium oxide, 30 to 45 parts of silicon dioxide and 10 to 25 parts of calcium fluoride. The refining slag and the method for refining the molten steel have the advantages of effectively controlling the impurities of the steel, making the impurity components in the steel positioned in a plastic region, improving the quality of products and particularly providing a new choice for producing many kinds of steels such as the cord thread steel, along with wide application prospect.

Titanium-complex-containing liquid fertilizer, preparation method thereof, and solid fertilizer containing the same

The invention relates to a preparation method of a titanium-complex-containing liquid fertilizer, which comprises the following steps: 1) dissolving titanyl sulfate or titanium sulfate in water; 2) adding a ligand A; 3) adding a ligand B; and 4) aging, wherein the ligand A and the ligand B are independently selected from tartaric acid, citric acid, malic acid, mandelic acid and lactic acid, and the ligand A and the ligand B are different; the ligand A, the ligand B and Ti (IV) meet the following relationship: 2 <= (the total mole number of the ligand A and the ligand B): the mole number of Ti(IV) <= 12. The invention also relates to the liquid fertilizer prepared by the method, and a solid fertilizer containing the liquid fertilizer. The titanium-complex-containing liquid fertilizer usesfew ligands, has higher stability, and is still clear and transparent when being put for more than one year, and the concentration of titanium ion in a solution is almost unchanged, so the liquid fertilizer ...

High-basicity refining slag for slag washing for steel-making of revolving furnace

Continuous casting mould powder and preparation method thereof

The invention provides continuous casting protective slag, which contains a compound containing calcium and a compound containing aluminum, and an additive; the additive is selected from one or more compounds for reducing the melting point and viscosity of the protective slag in the melting state, and the dosage of the additive ensures that the melting point of the protective slag is reduced to between 1,000 and 1,300 DEG C and viscosity below 1,300 DEG C is reduced to between 0.1 and 1Pa.S; the weight ratio of the compound containing aluminum to the compound containing calcium in the protective slag by oxides is 0.3-1.5; and by taking total weight of the protective slag as a standard based on the oxides, the content of the compound containing aluminum is more than or equal to 5 percent of the total weight. Compared with the prior continuous casting protective slag, the continuous casting protective slag can effectively reduce the surface defect rate of casting blanks.

Joint of square steel tube concrete column and reinforced concrete floor and production method thereof

The invention provides a joint of a square steel tube concrete column and a reinforced concrete floor and a production method. The joint comprises a ring beam and a shearing-resistant ring, wherein a reinforcement cage is formed by binding the ring beam with an inside constructional steel bar of the ring beam, an inner ring steel bar of the ring beam, an outer ring steel bar of the ring beam and stirrups of the ring beam, and obtains an annular structure with a round outer side and a square inner side after the concreting; a plurality of stirrups of the ring beam are bound on the inside constructional steel bar of the ring beam, the inner ring steel bar of the ring beam and the outer ring steel bar of the ring beam, and are uniformly distributed radially along the axial direction; and a square steel tube penetrates through a square hole in the ring beam. When the production is carried out, a prefabricated ring beam reinforcement cage is processed on the construction site or in the factory ...

RH decarburization method during ultra-low-carbon steel production process by revolving furnace

The invention relates to an RH decarburization treatment method in the process of producing ultra low carbon steel by a converter, and belongs to the technical field of ferrous metallurgy. The technical problem to be solved by the invention is that an RH insert tube is prevented from sticking slag in the process of producing the ultra low carbon steel by the converter process. The technical proposal is as follows: chemical compositions of ladle slag in the process of the RH decarburization treatment of the ultra low carbon steel are controlled as follows based on the weight percentages: 5.0-11.0% of SiO2, 40.0-48.0% of CaO, 7.5-15.0% of Al2O3, 7.5-12.0% of MgO, 20.0% of FeO, 7.0% of MnO, Fe2O3, CaF2 and micro constituents such as S, P, TiO2 and the like, thus improving the CaO/Al2O3 ratio and the (CaO/SiO2)/Al2O3 ratio, effectively inhibiting the separation of high-melting point phase of the ladle slag, reducing the melting point and the viscosity of the ladle slag, enhancing the flowability ...

Tooth blenching liquid harmless for dental enamel and its using method

Combined bio-trickling filter linkage organic waste gas treatment equipment

The invention discloses combined bio-trickling filter linkage organic waste gas treatment equipment, which relates to an organic waste gas and waste water treatment device in environmental engineering. The invention adopts two sets of independent bio-trickling filters, increases a sewage inlet system, increases a back flushing gas inlet system, simultaneously has the effect of an aeration system, increases serial connection gas pipes 9 and 9', increases three-way valves 21, 21', 44 and 44', increases four-way valves 30 and 30', increases relevant valves, and controls the gas inlet and the liquid inlet, so the invention can operate in various modes such as parallel connection operation, serial connection operation, waste water and waste gas simultaneous treatment operation, waste water single treatment operation and the like. Four active carbon fiber cloth filling material processing units are filled and arranged in the bio-trickling filter and are in overlapped arrangement, the filling ...

Method for controlling nitrogen content in steel by semi-steel smelting

The invention discloses a method for controlling nitrogen content in steel by semi-steel smelting. According to the invention, the method for controlling nitrogen content in steel by semi-steel smelting comprises the following steps of: performing oxygen top blowing by using a converter, performing slag-modifying treatment before tapping, and blocking the slag and tapping. In addition, according to the requirements steel on nitrogen content, different bottom-blowing modes are adopted in the oxygen top blowing process by converter, a foaming agent is added at the last stage of blowing, argon gas is blown to ladles 1 to 3 minutes before tapping, and the soft argon blowing operation is performed on ladles during the tapping step. By adoption of the method provided by the invention, the nitrogen content in steel at the converter end-point can be controlled to be within 11 ppm and the nitrogen increase can be controlled to be between 1ppm to 3 ppm during the tapping step. The method provided ...

Concrete pump truck and boom device thereof

The invention discloses a boom device of a concrete pump truck, comprising multi-section booms which are mutually hinged. Any one boom rotates relative to adjacent booms under the action of a drive part. The boom device also comprises at least a short arm (1) which is hinged at the tail end of the last boom by a first hinged shaft (2). A first power part is installed between the short arm (1) and the last boom. The short arm (1) rotates around the first hinged shaft (2) relative to the last boom under the action of the first power part, so that when folded, the short arm (1) is arranged below the last boom, and the included angle formed by the axis of the short arm (1) and the vertical plane is not more than 45 degrees. Therefore, the height and the length of the folded boom device are effectively reduced. The invention also discloses a concrete pump truck utilizing the boom device.

CONCENTRIC COPLANAR CAPACITIVE SENSOR FOR NONDESTRUCTIVE EVALUATION

A concentric coplanar capacitive sensor includes a charged central disc forming a first electrode, an outer annular ring coplanar with and outer to the charged central disc, the outer annular ring forming a second electrode, and a gap between the charged central disc and the outer annular ring. The first electrode and the second electrode may be attached to an insulative film. A method provides for determining transcapacitance between the first electrode and the second electrode and using the transcapacitance in a model that accounts for a dielectric test piece to determine inversely the properties of the dielectric test piece. 1. A concentric coplanar capacitive sensor , comprising:a charged central disc forming a first electrode;an outer annular ring coplanar with and outer to the charged central disc, the outer annular ring forming a second electrode;a gap between the charged central disc and the outer annular ring; andthe first electrode and the second electrode attached to an insulative film.2. The concentric coplanar capacitive sensor of wherein the first electrode and the second electrode being formed of copper.3. The concentric coplanar capacitive sensor of wherein the charged central disc and outer annular ring provide rotational symmetry.4. The concentric coplanar capacitive sensor of wherein the first electrode and the second electrode being electrically connected to a capacitance measuring circuit for measuring transcapacitance between the first electrode and the second electrode.5. A rotationally invariant hand-held capacitive probe claim 1 , comprising the concentric coplanar capacitive sensor of .6. A capacitive nondestructive evaluation system for evaluating a dielectric test piece claim 1 , the system comprising:a concentric coplanar capacitive sensor, comprising (a) a charged central disc forming a first electrode, (b) an outer annular ring coplanar with and outer to the charged central disc, the outer annular ring forming a second electrode, and ( ...

Method for adding virtual keys on touch screen to operate flash games

The invention discloses a method for adding virtual keys on a touch screen to operate flash games, which comprises the following steps of: (a) intercepting a touch event above a flash game layer of a touch screen mobile phone or a flat computer in a software mode; (b) judging whether the coordinate of the event is in a key area or not; and (c) directly transmitting the touch event to the flash game when the coordinate of the event is not in the key area, and converting the touch event into a key event by a certain process and transmitting information to the flash game when the coordinate of the event is in the key area. The method has the advantages that: a user of the touch screen with a certain version is not limited by a network any more, and more game contents can be provided for various large mobile platform manufacturers, so that the product development cost of the manufacturers is greatly reduced, the market competitiveness of the manufacturers is increased, and a new operation and ...

Concrete pump truck and boom device thereof

The invention discloses a boom device of a concrete pump truck, comprising multi-section booms which are mutually hinged. Any one boom rotates relative to adjacent booms under the action of a drive part. The boom device also comprises at least a short arm (1) which is hinged at the tail end of the last boom by a first hinged shaft (2). A first power part is installed between the short arm (1) andthe last boom. The short arm (1) rotates around the first hinged shaft (2) relative to the last boom under the action of the first power part, so that when folded, the short arm (1) is arranged belowthe last boom, and the included angle formed by the axis of the short arm (1) and the vertical plane is not more than 45 degrees. Therefore, the height and the length of the folded boom device are effectively reduced. The invention also discloses a concrete pump truck utilizing the boom device.

Preparation method novel quaternary ammonium chitosan cross-linking resin

The invention discloses chitosan resin for adsorbing and degrading metal ions and azo dyes RB-5 in waste water, and the structural formula is shown as the figure (1). The preparation method comprises the following steps of: protecting the amino-group to form Schiff base, and then protecting the amido group; preparing cross-linking chitosan resin by using a cross-linking agent EGDE (Ethylene Glycol Diglycidyl Ether); and deprotecting the amido group, and then reacting epoxy chloropropane, TEPA (Tetra Ethylene Pentamine) and GTMAC (Glycidyl Trimethyl Ammonium Chloride) with cross-linking chitosan resin to form quaternary ammonium salt resin. Compared with the traditional chitosan resin, the quaternary ammonium chitosan cross-linking resin has good adsorption effect on various metal ions as well as the azo dyes RB-5.

Double-layer tundish covering agent

The invention relates to a double-layer middle coating agent which belongs to the field of metallurgy. The invention solves the technical problem of providing a double-layer middle coating agent capable of preventing crusting on a slag surface. The double-layer middle coating agent comprises an upper layer of slag materials and a lower layer of slag materials; wherein, the components of the lower layer of slag materials thereof comprise 40 to 60 weight portions of CaO, 20 to 40 weight portions of Al2O3, as well as 5 to 7 weight portions of CaF2; moreover, the weight ratio between CaO and Al2O3 is 1 to 3. The double-layer middle coating agent not only can prevent crusting on the slag surface, but also has stronger capacity for absorbing impurities and excellent heat preservation function; moreover, the double-layer middle coating agent can reduce the secondary pollution to molten steel and has broad application prospect.

Method for controlling nitrogen content in Al deoxidization steel by converter process

The invention belongs to the technical field of ferrous metallurgy, in particular relates to a method for controlling nitrogen content of aluminum killed steel produced in a converter process, and is used for preventing the problem that the nitrogen content increases in the aluminum killed steel produced in the converter process. The technical problem is solved by controlling the nitrogen content of the aluminum killed steel produced in the converter process according to the technical proposal as follows: the alkalinity of converter slag CaO/SiO2 is adjusted to 5-7 when a converter starts to produce the slag, the denitrification rate can be increased in the converter smelting process by controlling the alkalinity of the converter slag, the denitrification rate is increased from 50%-70% to 65%-85%, and the terminal nitrogen content of the molten steel in the converter can be controlled within 15PPm. The alkalinity is controlled, special slag is added, and a seal washer with brim is employed ...

RH decarburization method during ultra-low-carbon steel production process by revolving furnace

The invention relates to an RH decarburization treatment method in the process of producing ultra low carbon steel by a converter, and belongs to the technical field of ferrous metallurgy. The technical problem to be solved by the invention is that an RH insert tube is prevented from sticking slag in the process of producing the ultra low carbon steel by the converter process. The technical proposal is as follows: chemical compositions of ladle slag in the process of the RH decarburization treatment of the ultra low carbon steel are controlled as follows based on the weight percentages: 5.0-11.0% of SiO2, 40.0-48.0% of CaO, 7.5-15.0% of Al2O3, 7.5-12.0% of MgO, 20.0% of FeO, 7.0% of MnO, Fe2O3, CaF2 and micro constituents such as S, P, TiO2 and the like, thus improving the CaO/Al2O3 ratio and the (CaO/SiO2)/Al2O3 ratio, effectively inhibiting the separation of high-melting point phase of the ladle slag, reducing the melting point and the viscosity of the ladle slag, enhancing the flowability ...

Tooth blenching liquid harmless for dental enamel and its using method

Tooth blenching liquid harmless for dental enamel and its using method

Production method of gear steel

A production method of gear steel comprises the following steps: adding semisteel after vanadium extraction to a converter to be melted, adding molten steel obtained after melting to a ladle, then carrying out ladle furnace refining in the presence of refining slag and deoxidants and finally carrying out vacuum treatment and steel billet continuous casting, wherein the refining slag is added to the ladle at least by two batches, during first batch, the refining slag is added in the time slice from starting adding the molten steel obtained after melting to the ladle to adding 30wt% of molten steel obtained after melting to the ladle and the residual refining slag is added in the time slice from adding all the molten steel obtained after melting to the ladle to starting ladle furnace refining; the deoxidants include bulk deoxidants and diffusion deoxidants; the bulk deoxidants include aluminium alloy deoxidants; the aluminium alloy deoxidants are added when 25-45% of the total molten steel ...

Wheel steel and preparation method as well as wheel thereof

The invention provides a wheel steel which contains the following chemical components measured by simple substances on the basis of the total weight of the wheel steel: 0.07-0.12wt% of C, 0.01-0.15wt% of Si, 1.1-1.3wt% of Mn, 0.01-0.04wt% of Ti, 0.001-0.004wt% of Ca, 0.015-0.065wt% of acid-soluble Al, not larger than 0.025wt% of P, not larger than 0.015wt% of S and 97.31-98.87wt% of Fe. The invention also provides a preparation method of the wheel steel and a wheel, wherein the wheel is made of the wheel steel provided by the invention. The wheel steel provided by the invention has proper higher strength and toughness.

Continuous casting crystallizer protective scoria for weathering steel and manufacturing method thereof

The present invention relates to a continuous casting mold protecting powder and the manufacturing method of the mold protecting powder for a weathering steel. Adopting the making art of spraying particle, the mold protecting powder is made from the materials such as premelting material, quartz sand, fluorite, industrial calcined soda, magnesite, medium supper soot carbon, graphite, lithium carbonate and so on, chemical ingredients of the mold protection powder in weight percentage are as follows: SiO2 30.0 to 37.0 percent, CaO 30.0 to 37.0 percent, Al2O3 2.0 to 5.0 percent, MgO 3.0 to 6.0 percent, Li2O 1.5 to 2.5 percent, Na2O 5.5 to 8.5 percent, F 4.5 to 7.5 percent, TC(totally carbon) 4.5 to 6.5 percent, 0< Fe2O3 less than or eqal to 1.0%, binary alkalinity CaO/SiO2 is 0.95 to 1.05. The mold protecting powder regarding the invention melts evenly inside the mold and has weak reaction with the rare earth wire, excellent lubricating performance to the casting blank, even and proper heat ...

Rail steel and preparation method thereof

The invention relates to a rail steel and a preparation method thereof. The rail steel contains the following components by taking the total weight of the rail steel as reference 0.65-0.75wt% of C, 0.80-1.30wt% of Mn, 0.10-0.50wt% of Si, less than or equal to 0.03wt% of V, less than or equal to 0.025wt% of P, 0.008-0.025wt% of S, less than or equal to 0.004wt% of Al, the balance of iron. Cleanliness of the rail steel is indicated by the grade of T(O) content, (H) content and contents of nonmetallic inclusions A, B, C and D, wherein total oxygen content T(O) in the rail steel is less than or equal to 0.0020wt%, (H) content is less than or equal to 0.0002wt%, and according to inclusion rating standard GB/T10561-2005, the inclusion A in the rail steel is less than or equal to 1.5 grade, the inclusion B is less than or equal to 1.0 grade, inclusion C is less than or equal to 1.0 grade, and the inclusion D is less than or equal to 1.0 grade. The rail steel for high speed railway provided by ...

Y aromatic ligand ionic liquid and preparation method thereof

The invention discloses a Y aromatic ligand ionic liquid and a preparation method thereof. The ionic liquid has the structural formula of (Y-ligand)n.LiX, wherein Y-ligand is a Y aromatic compound selected from one of caprolactam, N,N-dimethyl acetamide, urea and thiocarbamide; X stands for Cl, Br or I; and n=2-5. The preparation method comprises the following steps: evenly mixing inorganic salt LiX and the Y aromatic compound in the mol ration of 1:2-5, heating to 70-150 DEG C, keeping for 1-4 hours, and cooling to obtain the Y aromatic ligand ionic liquid. The ionic liquid is hopeful to become a novel conducting material and be widely used for organic synthesis. The invention has the advantages of simple preparation technique, accessible raw material, low cost, no pollutant discharge in reaction, and no byproduct, and is suitable for large-scale industrial production.

Preparation method of rail steel

The invention relates to a rail steel and a preparation method thereof. The rail steel contains the following components by taking the total weight of the rail steel as reference 0.65-0.75wt% of C, 0.80-1.30wt% of Mn, 0.10-0.50wt% of Si, less than or equal to 0.03wt% of V, less than or equal to 0.025wt% of P, 0.008-0.025wt% of S, less than or equal to 0.004wt% of Al, the balance of iron. Cleanliness of the rail steel is indicated by the grade of T(O) content, (H) content and contents of nonmetallic inclusions A, B, C and D, wherein total oxygen content T(O) in the rail steel is less than or equal to 0.0020wt%, (H) content is less than or equal to 0.0002wt%, and according to inclusion rating standard GB/T10561-2005, the inclusion A in the rail steel is less than or equal to 1.5 grade, the inclusion B is less than or equal to 1.0 grade, inclusion C is less than or equal to 1.0 grade, and the inclusion D is less than or equal to 1.0 grade. The rail steel for high speed railway provided by ...

Titanium-complex-containing liquid fertilizer, preparation method thereof, and solid fertilizer containing the same

The invention relates to a preparation method of a titanium-complex-containing liquid fertilizer, which comprises the following steps: 1) dissolving titanyl sulfate or titanium sulfate in water; 2) adding a ligand A; 3) adding a ligand B; and 4) aging, wherein the ligand A and the ligand B are independently selected from tartaric acid, citric acid, malic acid, mandelic acid and lactic acid, and the ligand A and the ligand B are different; the ligand A, the ligand B and Ti (IV) meet the following relationship: 2 <= (the total mole number of the ligand A and the ligand B): the mole number of Ti (IV) <= 12. The invention also relates to the liquid fertilizer prepared by the method, and a solid fertilizer containing the liquid fertilizer. The titanium-complex-containing liquid fertilizer uses few ligands, has higher stability, and is still clear and transparent when being put for more than one year, and the concentration of titanium ion in a solution is almost unchanged, so the liquid fertilizer ...

Production method of gear steel

A production method of gear steel comprises the following steps: adding semisteel after vanadium extraction to a converter to be melted, adding molten steel obtained after melting to a ladle, then carrying out ladle furnace refining in the presence of refining slag and deoxidants and finally carrying out vacuum treatment and steel billet continuous casting, wherein the refining slag is added to the ladle at least by two batches, during first batch, the refining slag is added in the time slice from starting adding the molten steel obtained after melting to the ladle to adding 30wt% of molten steel obtained after melting to the ladle and the residual refining slag is added in the time slice from adding all the molten steel obtained after melting to the ladle to starting ladle furnace refining; the deoxidants include bulk deoxidants and diffusion deoxidants; the bulk deoxidants include aluminium alloy deoxidants; the aluminium alloy deoxidants are added when 25-45% of the total molten steel ...

Tooth decolorizer harmless for dental enamel blenching liquid and its using method

Method for controlling nitrogen content in Al deoxidization steel by converter process

The invention belongs to the technical field of ferrous metallurgy, in particular relates to a method for controlling nitrogen content of aluminum killed steel produced in a converter process, and is used for preventing the problem that the nitrogen content increases in the aluminum killed steel produced in the converter process. The technical problem is solved by controlling the nitrogen content of the aluminum killed steel produced in the converter process according to the technical proposal as follows: the alkalinity of converter slag CaO/SiO2 is adjusted to 5-7 when a converter starts to produce the slag, the denitrification rate can be increased in the converter smelting process by controlling the alkalinity of the converter slag, the denitrification rate is increased from 50%-70% to 65%-85%, and the terminal nitrogen content of the molten steel in the converter can be controlled within 15PPm. The alkalinity is controlled, special slag is added, and a seal washer with brim is employed ...

Continuous casting crystallizer protective scoria for weathering steel and manufacturing method thereof

High-basicity refining slag for slag washing of revolving furnace steel-making

The invention relates to a high-alkalinity refining slag and a preparing method for the slag for scrubbing slag of a converter, which comprises active lime, fluorspar and industrial pure alkaline that are mixed evenly in a disk mixer. The chemical components of the slag by weight are: 70.0%<=CaO<= 88%, 0=23.3. When the high-alkalinity refining slag is used for scrubbing slag when tapping in the converter, the melting is fast, and no splashing will occur, the desulfurization efficiency is high and steady, and can meet the requirements for refining, deoxidizing and removing non-metallic foreign matters.

Method for producing medium and low carbon aluminum killed steel

The invention provides a method for producing medium and low carbon aluminum killed steel, which comprises the following steps of: controlling the content of sulfur in molten iron to be not more than 0.015 percent; primarily smelting the molten iron to form molten steel, and tapping; adding an aluminum deoxidizer into the molten steel when 20 to 30 weight percent of molten steel is tapped; adding4.0 to 6.0kg of active lime and fluorite in an amount which is 0.2 times that of the active lime into each ton of molten steel when 31 to 50 weight percent of molten steel is tapped; performing argonblowing refining for the first time; adding aluminum in two or three batches and 1.5 to 4kg of refining slag into each ton of steel in a steel ladle, heating, and refining; performing calcium treatment on the molten steel; performing argon blowing refining for the second time; and performing continuous casting. By the method, the castability of the molten steel can be improved, the phenomenon of water ...

Continuous casting mould fluxes and preparation method thereof

The invention provides continuous casting protective slag, which contains a compound containing calcium and a compound containing aluminum, and an additive; the additive is selected from one or more compounds for reducing the melting point and viscosity of the protective slag in the melting state, and the dosage of the additive ensures that the melting point of the protective slag is reduced to between 1,000 and 1,300 DEG C and viscosity below 1,300 DEG C is reduced to between 0.1 and 1Pa.S; the weight ratio of the compound containing aluminum to the compound containing calcium in the protective slag by oxides is 0.3-1.5; and by taking total weight of the protective slag as a standard based on the oxides, the content of the compound containing aluminum is more than or equal to 5 percent of the total weight. Compared with the prior continuous casting protective slag, the continuous casting protective slag can effectively reduce the surface defect rate of casting blanks.

Double-layer tundish covering agent

The invention relates to a double-layer middle coating agent which belongs to the field of metallurgy. The invention solves the technical problem of providing a double-layer middle coating agent capable of preventing crusting on a slag surface. The double-layer middle coating agent comprises an upper layer of slag materials and a lower layer of slag materials; wherein, the components of the lower layer of slag materials thereof comprise 40 to 60 weight portions of CaO, 20 to 40 weight portions of Al2O3, as well as 5 to 7 weight portions of CaF2; moreover, the weight ratio between CaO and Al2O3 is 1 to 3. The double-layer middle coating agent not only can prevent crusting on the slag surface, but also has stronger capacity for absorbing impurities and excellent heat preservation function; moreover, the double-layer middle coating agent can reduce the secondary pollution to molten steel and has broad application prospect.

Easy-cutting gear steel and smelting method thereof

The invention discloses easy-cutting gear steel and a smelting method thereof. The steel comprises the following components in percentage by weight: 0.1 to 0.35% of carbon, 0.15 to 0.45% of silicon, 0.60 to 1.50% of manganese, 0.001 to 0.03% of phosphorus, 0.015 to 0.030% of sulfur, 0.080 to 1.50% of chromium, 0.03 to 0.12% of titanium, 0.01 to 0.10% of aluminum, 0.005 to 0.30% of nickel, 0.005 to 0.20% of molybdenum, 0.005 to 0.20% of copper, 0.004 to 0.015% of nitrogen, and the balance of iron. In the smelting method for the easy-cutting gear steel, a sectional type calcium processing technology is adopted, the problem that both total oxygen content and sulfur content in steel are guaranteed in the process of producing gear steel is solved, and the smelting method of the easy-cutting gear steel, provided by the invention, has the advantage of greater economic benefit.

Method for synthesizing 2,5-furandicarboxylic acid

The invention discloses a method for synthesizing 2,5-furandicarboxylic acid, which comprises the following steps of: mixing furans and alkaline solution in a mass ratio of 1:5-50, adding a noble metal catalyst in an amount of 1 to 5 percent of the molar weight of the furans, continuously introducing oxygen at normal temperature, and reacting for 10 to 30 hours, wherein based on each gram of the furans, the oxygen introducing rate is 5 to 20ml/min; and adjusting the pH of the reaction liquid to less than 3 with concentrated acid, and precipitating the 2,5-furandicarboxylic acid, wherein the noble metal catalyst is Pt/C, Au/C, Pd/C, Pt/C/CuO-Ag2O, Au/C/CuO-Ag2O or Pd/C/CuO-Ag2O, and the concentrated acid is concentrated hydrochloric acid or concentrated sulfuric acid. The process method for synthesizing the 2,5-furandicarboxylic acid has the advantages of simple and direct route, energy conservation, environmental protection, high quality and low cost of the obtained product, and good application ...

Semisteel steelmaking method

The invention provides a semisteel steelmaking method, which comprises: blowing semisteel in a converter; adding a slag former; controlling the terminal of converter blowing; tapping; and stirring molten stirring at an argon flushing station. In the control of the terminal of converter blowing, the carbon content in the molten steel is kept between 0.04 and 0.10 weight percent; and carbon is added into a ladle in a tapping process. When the semisteel steelmaking method provided by the invention is used, the problem that the terminal carbon content in molten steel is high while the tapping temperature is low during semisteel smelting, and the problem that the terminal carbon content in molten steel is low while the carburant yield in the tapping process is low and/or instable are solved.

ADHESIVE DENTAL BLEACHING COMPOSITIONS CONTAINING POLYVINYLPYRROLIDONE

A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include water, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material. 1. An adhesive one-part dental bleaching composition for bleaching a person's teeth , comprising:a dental bleaching agent selected from the group consisting of hydrogen peroxide, carbamide peroxide, sodium perborate, sodium percarbonate, and combinations thereof;water in an amount of at least 0.1% by weight of said dental bleaching composition; andpolyvinylpyrrolidone included in an amount of at least about 10% by weight so that said dental bleaching composition is highly viscous and adhesive when applied to a person's teeth.2. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone comprising at least about 25% by weight of the dental bleaching composition.3. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone having a molecular weight in a range of about 90 claim 1 ,000 to about 1 claim 1 ,500 claim 1 ,000.4. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone having a molecular weight in a range of about 1 claim 1 ,000 claim 1 ,000 to about 1 claim 1 ,500 claim 1 ,000.5. An adhesive one-part dental bleaching composition as in claim 1 , wherein said tooth adhesion agent is included in an amount that exceeds an amount of said dental bleaching agent in the dental bleaching composition.6. An adhesive one-part dental bleaching composition as in claim 1 , said water having a ...

ADHESIVE DENTAL BLEACHING COMPOSITIONS CONTAINING POLYVINYLPYRROLIDONE

A dental bleaching composition comprises a dental bleaching agent, polyvinylpyrrolidone, and at least 0.1% water. The bleaching composition may include a liquid component, flavoring agent, basic substance, and/or desensitizing agent as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material. 2. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone comprising at least about 25% by weight of said dental bleaching composition.3. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone having a molecular weight of at least 90 claim 1 ,000.4. An adhesive one-part dental bleaching composition as in claim 1 , said polyvinylpyrrolidone having a molecular weight in a range of about 90 claim 1 ,000 to about 1 claim 1 ,500 claim 1 ,000.5. An adhesive one-part dental bleaching composition as in claim 1 , said dental bleaching composition including an amount of tooth adhesion agent that exceeds an amount of said dental bleaching agent.6. An adhesive one-part dental bleaching composition as in claim 1 , said dental bleaching composition comprising 0.2-80% of water by weight.7. An adhesive one-part dental bleaching composition as in claim 1 , further comprising at least one component selected from the group consisting of glycerin claim 1 , propylene glycol claim 1 , polyethylene glycol claim 1 , polypropylene glycol claim 1 , ethanol claim 1 , fumed silica claim 1 , xanthan gum claim 1 , pectin claim 1 , guar gum claim 1 , hydroxyl propyl cellulose claim 1 , gelatin claim 1 , natural gums claim 1 , carboxypolymethylene claim 1 , and water soluble waxes.8. A dental bleaching device comprising the adhesive ...

Tooth whitening compositions and methods

A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include a liquid component, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material.

BATTERY BOX

This application discloses a battery box, including a battery case and a plurality of batteries accommodated in the battery case. The batteries are bonded to an inner wall of the battery case by using an adhesive, a coefficient of thermal expansion of the adhesive is α in units of ppm/° C., a coefficient of thermal conductivity of the adhesive is β in units of W/mK, and a ratio of α and β meet a relation of 15≤α/β≤80. In the battery box in this application, the battery case and the plurality of batteries accommodated in the battery case are bonded by using the adhesive. When the coefficient of thermal conductivity of the adhesive matches the coefficient of thermal expansion, heat conduction requirements of the battery box can be satisfied, and the adhesive can also be prevented from cracking or peeling off under heat stress due to alternating temperatures during use of the battery box, thereby improving safety performance of the battery box. 1. A battery box , comprising a battery case and a plurality of batteries accommodated in the battery case , wherein the batteries are bonded to an inner wall of the battery case by using an adhesive , a coefficient of thermal expansion of the adhesive is α in units of ppm/° C. , a coefficient of thermal conductivity of the adhesive is β in units of W/mK , and a ratio of α and β meet a relation of 15≤α/β≤80.2. The battery box according to claim 1 , wherein the ratio of the coefficient of thermal expansion α and the coefficient of thermal conductivity β of the adhesive meet a relation of 25≤α/β≤45 claim 1 , wherein the coefficient of thermal expansion α is in units of ppm/° C. and the coefficient of thermal conductivity β is in units of W/mK.3. The battery box according to claim 1 , wherein the coefficient of thermal expansion α of the adhesive is 30 ppm/° C. to 55 ppm/° C. and preferably 30 ppm/° C. to 45 ppm/° C.; and the coefficient of thermal conductivity β of the adhesive is 0.6 W/mK to 1.9 W/mK and preferably 0.8 W/mK to 1. ...

ADHESIVE DENTAL BLEACHING COMPOSITIONS CONTAINING POLYVINYLPYRROLIDONE

A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include a liquid component, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material. 1. An dental bleaching composition , comprising:at least one of hydrogen peroxide, carbamide peroxide, sodium perborate or sodium percarbonate;at least 10% of a liquid component comprising at least one of polyethylene glycol or glycerin; andat least 10% by weight polyvinylpyrrolidone.2. The dental bleaching composition of claim 1 , wherein the liquid component consists of glycerin.3. The dental bleaching composition of claim 1 , further comprising at least 10% of a basic substance comprising at least one of sodium hydroxide claim 1 , potassium hydroxide claim 1 , calcium hydroxide and triethanol amine.4. The dental bleaching composition of claim 1 , wherein the polyvinylpyrrolidone is a homopolymer.5. The dental bleaching composition of claim 1 , further comprising potassium nitrate.6. The dental bleaching composition of claim 1 , further comprising a gum.7. The dental bleaching composition of claim 1 , wherein the gum comprises pectin.8. The dental bleaching composition of claim 1 , wherein the dental bleaching composition comprises at least 20% by weight polyvinylpyrrolidone.9. A dental bleaching strip claim 1 , comprising:a strip of material; and at least one of hydrogen peroxide, carbamide peroxide, sodium perborate or sodium percarbonate;', 'at least 10% of a liquid component consisting essentially of at least one of polyethylene glycol or glycerin; and', 'at least 10% by ...

RADIO FREQUENCY FRONT END MODULE INCLUDING COMMON FILTER

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system further includes at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch. 1. A radio frequency front end system comprising:at least one power amplifier configured to amplify a transmit radio frequency signal;at least one low noise amplifier configured to receive a receive radio frequency signal;an output node coupled to an antenna;at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period;at least one transmit filter coupled between the power amplifier and the at least one switch;at least one receive filter coupled between the low noise amplifier and the at least one switch; anda common filter coupled between the at least one switch and the output node.2. The front end system of wherein the at least one power amplifier includes a plurality of power amplifiers claim 1 , and the at least one low noise amplifier includes a plurality of low noise amplifiers.3. The front end system of further comprising a first multiplexer including the at least one transmit filter and a second multiplexer including the at least one receive filter claim 2 , wherein the at least one transmit filter includes a plurality of transmit filters and the at least one receive filter includes a plurality of ...

RADIO FREQUENCY FRONT END MODULE INCLUDING SUPPLEMENTAL FILTER

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system also includes a first switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch. The front end system further includes a transmit supplemental filter, a receive supplemental filter, and a second switch. 1. A radio frequency front end system comprising:at least one power amplifier configured to amplify a transmit radio frequency signal and at least one low noise amplifier configured to receive a receive radio frequency signal;a first switch configured to selectively couple an output node coupled to an antenna to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period;at least one transmit filter coupled between the power amplifier and the at least one switch and at least one receive filter coupled between the low noise amplifier and the at least one switch,a transmit supplemental filter and a receive supplemental filter; anda second switch configured to selectively couple the transmit supplemental filter to the at least one power amplifier during the transmit period and to couple the receive supplemental filter to the at least one low noise amplifier during the receive period.2. The front end system of wherein the first switch and the second switch are ganged together.3. The front end system of further comprising a common filter coupled between the first switch ...

METHOD AND DEVICE FOR PROCESSING CORE OF PROCESSOR , AND TERMINAL

Provided are a method and device for processing a core of a processor, and a terminal. The method comprises that: a current utilization rate of the processor is acquired; and the number of currently-running cores of the processor is processed according to the acquired utilization rate. By means of the present disclosure, the problems of high device power consumption, high electric energy consumption, poor heat dissipation and the like in the related art are solved, thereby achieving the effects of improving the utilization rate of the processor, lowering power consumption and improving user experience. 1. A method for processing a core of a processor , comprising:acquiring a current utilization rate of the processor; andprocessing the number of currently-running cores of the processor according to the acquired utilization rate.2. The method as claimed in claim 1 , wherein acquiring the current utilization rate of the processor comprises:recording working duration of the processor within predetermined sampling duration; anddetermining a ratio of the working duration to the sampling duration as the current utilization rate.3. The method as claimed in claim 1 , wherein processing the number of the currently-running cores of the processor according to the acquired utilization rate comprises:determining a predetermined corresponding relationship between a utilization rate and the number of running cores of the processor;determining the corresponding number of the currently-running cores of the processor according to the predetermined corresponding relationship, wherein the corresponding number of the currently-running cores of the processor corresponds to the acquired utilization rate according to the predetermined corresponding relationship; andopening or closing a core of the processor according to the determined corresponding number of the currently-running cores of the processor.4. The method as claimed in claim 3 , wherein determining the predetermined corresponding ...

Battery box

The present disclosure provides a battery box, the battery box comprises a box body, batteries, an insulating film and an adhesive. Each battery comprises a case. The insulating film covers the case of each battery and is provided with an opening. The adhesive is provided between the battery and the box body. The σ 1 , σ 2 , A 1 and A meet a following relationship A - A 1 A · σ 2 + A 1 A · σ 1 ≥ 7.2   Mpa . The insulating film ensures the insulation performance, and because the insulating film is provided with the opening, a portion of the adhesive bonds the case to the box body at the opening, a portion of the adhesive bonds the insulating film to the box body at the outside of the opening, therefore the bonding strength between the battery and the box body is improved, thereby improving the overall strength. Moreover, because σ 1 , σ 2 , A 1 and A meet the above relationship, the battery box ensures the safety performance.

Battery box

Because the insulating film is provided with the opening, a portion of the adhesive bonds the case to the box body at the opening, a portion of the adhesive bonds the insulating film to the box body at the outside of the opening, it ensures the bonding strength between the battery and the box body. Meanwhile, it makes a covering area of the insulating film on the battery meet the requirement of the insulating strength, thereby ensuring the safety performance.

Adhesive dental bleaching compositions containing polyvinylpyrrolidone

A dental bleaching composition comprises a dental bleaching agent, polyvinylpyrrolidone, and at least 0.1% water. The bleaching composition may include a liquid component, flavoring agent, basic substance, and/or desensitizing agent as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material.

Methods of bleaching teeth using adhesive dental bleaching compositions containing polyvinylpyrrolidone

A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include water, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material.

Enamel-safe tooth bleach and method for use

A dental bleach that includes a bleaching agent and a thickening agent. The bleaching agent is typically a peroxide and the thickening agent is polyvinylpyrrolidone. A viscous or sticky dental bleach results. Optionally, a basic agent, light or heat may be added to accelerate bleaching. Bleaching may take place with the use of a dental tray. Bleach may be placed into the dental tray from a single barrel, double barrel or multi-barrel syringe containing the components of the bleach. Bleach may be placed against a flexible strip which is placed onto teeth to be bleached.

Dental bleach

A dental bleach using a bleaching agent and a polyvinylpyrrolidone thickening agent is disclosed. The bleach may include water, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener.

Intelligent separation and drying system for maggots and method of operating same

Disclosed are an intelligent separation and drying system for maggots and a method of operating the same. The intelligent separation and drying system includes an intelligent light control unit, an intelligent scraping unit, a separation unit, a drying unit, a travelling unit and a central control unit. The central control unit is connected to other units through signals. Multidisciplinary techniques, including spectrum analysis, machine learning algorithm and artificial neural network, are combined to automatically, systematically, intelligently and continuously separate maggots and maggot feed as well as dry the maggots with high efficiency in a clean manner.

Battery casing, method for manufacturing the same, and device containing battery casing

The present disclosure discloses a battery casing, a method for manufacturing the same, and a device including a battery casing. A battery casing includes a casing body, a plurality of battery cells accommodated in the casing body, and a fire protection plate which is disposed inside the casing body at least corresponding to the plurality of battery cells and includes a thermal aerosol fire protection layer which includes an aerosol generating agent, wherein a total mass A of the aerosol generating agent in the casing body and a free space volume B of the casing body satisfy a relationship as represented by 0.03 g/L≤A/B≤8 g/L.

Enamel-safe tooth bleach and method for use

A dental bleach that includes a bleaching agent and a thickening agent. The bleaching agent is typically a peroxide and the thickening agent is polyvinylpyrrolidone. A viscous or sticky dental bleach results. Optionally, a basic agent, light or heat may be added to accelerate bleaching. Bleaching may take place with the use of a dental tray. Bleach may be placed into the dental tray from a single barrel, double barrel or multi-barrel syringe containing the components of the bleach. Bleach may be placed against a flexible strip which is placed onto teeth to be bleached.

Concrete pump truck and boom device thereof

Battery casing, method for manufacturing the same, and device containing battery casing

The present disclosure discloses a battery casing, a method for manufacturing the same, and a device including a battery casing. A battery casing includes a casing body, a plurality of battery cells accommodated in the casing body, and a fire protection plate which is disposed inside the casing body at least corresponding to the plurality of battery cells and includes a thermal aerosol fire protection layer which includes an aerosol generating agent, wherein a total mass A of the aerosol generating agent in the casing body and a free space volume B of the casing body satisfy a relationship as represented by 0.03 g/L≤A/B≤8 g/L.

Steam generator system, steam generator pressure control system, and control method therefor

Disclosed are a steam generator system, a steam generator pressure control system, and a control method therefor. The steam generator pressure control system comprises a first control module for obtaining a pressure deviation value; a second control module for measuring and calculating a flow difference value between an outlet flow value and an inlet flow value, and then adding the flow difference value and the pressure deviation value together to obtain a first opening degree value for controlling a first valve of a water supply regulation valve group; and a third control module for measuring a steam intake pressure value of a steam turbine, and comparing the steam intake pressure value with a preset reference threshold value, so as to obtain a second opening degree value for controlling a second valve of the water supply regulation valve group. In the steam generator system, the steam generator pressure control system, and the control method therefor of the present invention, the opening and closing conditions of the water supply regulation valve group is controlled by means of a first control module, a second control module and a third control module, such that a steam generator is controlled, thereby satisfying the requirements for both coarse regulation and fine regulation.

Battery box

This application discloses a battery box, including a battery case and a plurality of batteries accommodated in the battery case. The batteries are bonded to an inner wall of the battery case by using an adhesive, a coefficient of thermal expansion of the adhesive is α in units of ppm/° C., a coefficient of thermal conductivity of the adhesive is β in units of W/mK, and a ratio of α and β meet a relation of 15≤α/β≤80. In the battery box in this application, the battery case and the plurality of batteries accommodated in the battery case are bonded by using the adhesive. When the coefficient of thermal conductivity of the adhesive matches the coefficient of thermal expansion, heat conduction requirements of the battery box can be satisfied, and the adhesive can also be prevented from cracking or peeling off under heat stress due to alternating temperatures during use of the battery box, thereby improving safety performance of the battery box.

Battery casing, method for manufacturing the same, and device containing battery casing

Method of wafer grounding utilizing wafer edge backside coating exclusion area

Systems and methods are provided for grounding a wafer (604;904) in a charged particle beam apparatus. The systems and methods include providing an exclusion area (613;911) in a backside film 608;908 on the wafer of sufficient size to allow an electrical connection between the wafer and an electrical contact (612;912) of the charged particle beam apparatus. The systems and methods may include contacting a pin body to a surface of the wafer, the wafer having a coating on the surface, and the pin body comprising a first tip and a second tip each extending from the pin body; wherein the contacting takes place at a first exclusion area of the coating by any one of the first tip, the second tip, or any combination thereof. There is also provided a method for forming a coating on a wafer surface, comprising masking a first exclusion area on the wafer surface with a first exclusion mask.

Radio frequency front end module including common filter

Radio frequency front end module including common filter

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system further includes at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch.

Engineering machinery

An engineering machinery includes a cab, a vehicle body located behind the cab, a rotating platform provided on the vehicle body, and multiple-sectional booms articulated in sequence, wherein a centerline of gyration of the rotating platform is located in a middle of the vehicle body, a first sectional boom is articulated with the rotating platform, and the first sectional boom extends from the rotating platform toward a rear end of the vehicle body, a second sectional boom is articulated with the first sectional boom and folded above the first sectional boom, the first sectional boom to a fourth sectional boom are folded into an R shape, a projection of a third sectional boom at least partially overlaps a projection of the cab on a vertical projection plane perpendicular to a length direction of the vehicle body.

Dual focus soluton for sem metrology tools

There is provided a charged particle apparatus comprising: a particle beam generator, optics, a first and a second positioning device, both configured for positioning the substrate relative to the particle beam generator along its optical axis, and a controller configured for switching between a first operational mode and a second operational mode. The apparatus is configured, when operating in the first operational mode, for irradiating the substrate by the particle beam at a first landing energy of the particle beam and, when operating in the second operational mode, for irradiating the substrate at a second, different landing energy. When operating in the first operational mode, the second positioning device is configured to position the substrate relative to the particle beam generator at a first focus position of the particle beam and in the second operational mode, to position the substrate at a second, different focus position.

共通フィルタを備える高周波フロントエンドモジュール

【課題】共通フィルタを備える高周波フロントエンドモジュールを提供する。【解決手段】ＲＦフロントエンド部分３１０は、送信高周波信号を増幅する少なくとも１つのパワーアンプ６０２と、受信高周波信号を受信する１つの低雑音増幅器６０４と、アンテナに結合された出力ノードと、、選択的に、送信期間に出力ノードを少なくとも１つのパワーアンプに結合し、受信期間に少なくとも１つの低雑音増幅器に結合する少なくとも１つのスイッチ６１４と、パワーアンプと少なくとも１つのスイッチとの間に結合された少なくとも１つの送信フィルタ６１０と、低雑音増幅器と少なくとも１つのスイッチとの間に結合された少なくとも１つの受信フィルタと６１２と、を備える。【選択図】図９Ｂ

Device of treating kitchen waste leachate and method of use thereof

Battery box, fabrication method therefor and apparatus containing battery box

Disclosed by the present application are a battery box, a fabrication method therefor, and an apparatus containing a battery box. The battery box comprises a box body, a plurality of battery units accommodated in the box body, and a fire protection plate. The fire protection plate at least corresponds to the plurality of battery units and is disposed at the interior of the box body, the fire protection plate comprises a hot aerosol fire-fighting layer, and the hot aerosol fire-fighting layer comprises an aerosol generating agent. The total mass A of the aerosol generating agent in the box body and the free space volume B of the box body satisfy: 0.03g/L≤A/B≤8g/L.

Battery box

This application discloses a battery box, including a battery case and a plurality of batteries accommodated in the battery case, where the batteries are bonded to an inner wall of the battery case by using an adhesive, a coefficient of thermal expansion of the adhesive is α in units of ppm/°C, a ratio of a coefficient of thermal conductivity of the adhesive is β is β in units of W/mK, and a ratio of α and β meets a relation of 15≤α/β≤80. In the battery box in this application, the battery case and the plurality of batteries accommodated in the battery case are bonded by using the adhesive. When the thermal conductivity coefficient of the adhesive matches its thermal expansion coefficient, heat conduction requirements of the battery box can be satisfied, and the adhesive can also be prevented from cracking or peeling off under heat stress due to alternating temperatures during use of the battery box, thereby improving safety performance of the battery box.

Battery box

This application discloses a battery box, including a battery case and a plurality of batteries accommodated in the battery case, where the batteries are bonded to an inner wall of the battery case by using an adhesive, a coefficient of thermal expansion of the adhesive is α in units of ppm/°C, a ratio of a coefficient of thermal conductivity of the adhesive is β is β in units of W/mK, and a ratio of α and β meets a relation of 15≤α/β≤80. In the battery box in this application, the battery case and the plurality of batteries accommodated in the battery case are bonded by using the adhesive. When the thermal conductivity coefficient of the adhesive matches its thermal expansion coefficient, heat conduction requirements of the battery box can be satisfied, and the adhesive can also be prevented from cracking or peeling off under heat stress due to alternating temperatures during use of the battery box, thereby improving safety performance of the battery box.

Battery box

This application discloses a battery box, including a battery case and a plurality of batteries accommodated in the battery case, where the batteries are bonded to an inner wall of the battery case by using an adhesive, a coefficient of thermal expansion of the adhesive is α in units of ppm/°C, a ratio of a coefficient of thermal conductivity of the adhesive is β is β in units of W/mK, and a ratio of α and β meets a relation of 15≤α/β≤80. In the battery box in this application, the battery case and the plurality of batteries accommodated in the battery case are bonded by using the adhesive. When the thermal conductivity coefficient of the adhesive matches its thermal expansion coefficient, heat conduction requirements of the battery box can be satisfied, and the adhesive can also be prevented from cracking or peeling off under heat stress due to alternating temperatures during use of the battery box, thereby improving safety performance of the battery box.

Noise figure performance in receive paths of front end modules

Technology is disclosed that systematically improves the noise figure (NF) on the receive path of front end architectures. The disclosed technologies tune the elements of the receive path in concert with one another to achieve superior or optimal NF performance. This may occur even where the NF performance of individual components is sub-optimal because it is the combination of the components that is tailored to provide superior or optimal NF performance. The disclosed technologies account for trade-offs in performance that arise when tuning individual components on the receive path, taking a holistic approach to the design of the receive path rather than focusing on optimizing individual elements or selected combinations of elements on the receive path.

Reducing impedance matching components in front end architectures for multi-band transmit and receive functions

Front end architectures are described that tailor duplexer characteristics to enable the removal of many of the impedance matching components typically included in a receive signal path between an antenna and receive amplifiers and in a transmit signal path between transmit amplifiers and the antenna. By tailoring duplexer characteristics, targeted impedance matching can be achieved for front end architectures. This enables the front-end architecture to impedance match without including typical impedance matching components along a signal path between the antenna and an amplifier. This can be implemented on the transmit signal path (e.g., between a power amplifier (PA) and the antenna), on the receive signal path (e.g., between the antenna and a low noise amplifier (LNA)), or both the transmit signal path and the receive signal path. Thus, the disclosed front end architectures are configured to reduce or eliminate the number of components required for impedance matching.

Steam generator system, steam generator pressure control system, and control method therefor

Engineering machine

The present application relates to the field of mechanical technology, specifically relates to an engineering machinery, including a cab, a vehicle body located behind the cab, a rotating platform provided on the vehicle body, and multiple-sectional booms articulated in sequence, wherein a centerline of gyration of the rotating platform is located in a middle of the vehicle body, a first sectional boom is articulated with the rotating platform, and the first sectional boom extends from the rotating platform toward a rear end of the vehicle body, a second sectional boom is articulated with the first sectional boom and folded above the first sectional boom, the first sectional boom to a fourth sectional boom are folded into an R shape, a projection of a third sectional boom at least partially overlaps a projection of the cab on a vertical projection plane perpendicular to a length direction of the vehicle body. The second sectional boom and the third sectional boom have large space in the height direction, which can make full use of the space above the vehicle body, the cross-sections of the second sectional boom and the third sectional boom can be made very high, which helps to improve the rigidity of the boom, the cab does not need to be shorter on the premise that the overall height is limited, thus saving costs.

Hybrid power system and working machinery

Disclosed is a hybrid power system and an operation machinery. The hybrid power system includes an engine, a power distribution device, and a double-shaft extension motor. An input end of the power distribution device is connected to the output end of the engine, a first power output end of the power distribution device is connected to one end of the drive shaft, the input end is connected to the first power output end; a second power output end of the power distribution device is connected to one end of the double-shaft extension motor, and the second power output end is configured to selectively coupled with the input end or separated from the input end; another end of the double-shaft extension motor is configured to connect with the hydraulic power system.

Battery box and vehicle

The present invention provides a battery box and a vehicle, the battery box comprises a box body, batteries, an insulating film and an adhesive. Each battery comprises a case. The insulating film covers the case of each battery and is provided with an opening. The adhesive is provided between the battery and the box body. Theσ₁,σ₂,A₁andAmeet a following relationship:A−A1A⋅σ2+A1A⋅σ1≥7.2Mpa.The insulating film ensures the insulation performance, and because the insulating film is provided with the opening, a portion of the adhesive bonds the case to the box body at the opening, a portion of the adhesive bonds the insulating film to the box body at the outside of the opening, therefore the bonding strength between the battery and the box body is improved, thereby improving the overall strength. Moreover, becauseσ₁,σ₂,A₁andAmeet the above relationship, the battery box ensures the safety performance.

Battery box and vehicle

The present invention provides a battery box and a vehicle, the battery box comprises a box body, batteries, an insulating film and a adhesive. Each battery comprises a case. The insulating film covers the case of each battery and is provided with an opening. The adhesive is provided between the battery and the box body. TheA₁,A,L₁,ρ₁,L₂andρ₂meet a following relationship:L1A1⋅ρ1⋅L2A−A1⋅ρ2L1A1⋅ρ1+L2A−A1⋅ρ2≥10MΩ.Because the insulating film is provided with the opening, a portion of the adhesive bonds the case to the box body at the opening, a portion of the adhesive bonds the insulating film to the box body at the outside of the opening, it ensures the bonding strength between the battery and the box body. Meanwhile, it makes a covering area of the insulating film on the battery meet the requirement of the insulating strength, thereby ensuring the safety performance.

Hybrid power system and operation machine

Disclosed is a hybrid power system and an operation machinery. The hybrid power system includes an engine, a power distribution device, and a double-shaft extension motor. An input end of the power distribution device is connected to the output end of the engine, a first power output end of the power distribution device is connected to one end of the drive shaft, the input end is connected to the first power output end; a second power output end of the power distribution device is connected to one end of the double-shaft extension motor, and the second power output end is configured to selectively coupled with the input end or separated from the input end; another end of the double-shaft extension motor is configured to connect with the hydraulic power system. The power distribution device is provided with a power coupling state and a separation state; in the power coupling state, the first power output end and the second power output end form a power coupling connection, so that the engine is connected to the double-shaft extension motor; in the separation state, the input end and the second power output end are separated, so that the engine and the double-shaft extension motor are separated. Disclosed can conveniently realize on-demand distribution of the power of the hybrid power system by changing the working state of the power distribution device according to actual needs.

Battery box, fabrication method therefor and apparatus containing battery box

The present disclosure discloses a battery casing, a method for manufacturing the same, and a device including a battery casing. A battery casing includes a casing body, a plurality of battery cells accommodated in the casing body, and a fire protection plate which is disposed inside the casing body at least corresponding to the plurality of battery cells and includes a thermal aerosol fire protection layer which includes an aerosol generating agent, wherein a total mass A of the aerosol generating agent in the casing body and a free space volume B of the casing body satisfy a relationship as represented by 0.03g/L≤A/B≤8g/L.

Battery box, fabrication method therefor and apparatus containing battery box

Disclosed by the present application are a battery box, a fabrication method therefor, and an apparatus containing a battery box. The battery box comprises a box body, a plurality of battery units accommodated in the box body, and a fire protection plate. The fire protection plate at least corresponds to the plurality of battery units and is disposed at the interior of the box body, the fire protection plate comprises a hot aerosol fire-fighting layer, and the hot aerosol fire-fighting layer comprises an aerosol generating agent. The total mass A of the aerosol generating agent in the box body and the free space volume B of the box body satisfy: 0.03g/L≤A/B≤8g/L.

Radio frequency front end module including supplemental filter

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system also includes a first switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch. The front end system further includes a transmit supplemental filter, a receive supplemental filter, and a second switch.

Radio frequency front end module including common filter

A front-end system includes a power amplifier (PA) 702, a low noise amplifier (LNA) 704 and an output node coupled to an antenna. A first transmit / receive switch 710 selectively couples the output node to the PA during a transmit period and to the LNA during a receive period. A transmit filter 706 is coupled between a PA and the first switch, and at a receive filter 708 is coupled between the low noise amplifier 704 and the first switch 710. A second switch 712 is used to couple a transmit supplemental filter 714 to the PA in a transmit period and to couple a receive supplemental filter 716 to the LNA during a receive period. The supplemental filters may be notch filters or/and shunt filters. A common filter 718 may be connected between the first switch and output node. The first switch and the second switch are preferably ganged together.

Online protection method and system

An online protection method and system. The online protection method comprises: obtaining calibration state data that is periodically updated (S10); performing reconstruction calculation on reactor core power distribution data corresponding to the total rod positions of control rods (S20); obtaining the current total rod position of each control rod in real time, and selecting a group of reactor core power distribution data from a plurality of groups of reactor core power distribution data as the current reactor core power distribution data (S30); calculating a maximum LPD value and a minimum DNBR value corresponding to the current total rod position of the control rod (S40); and according to the calculated maximum LPD value, the calculated minimum DNBR value, a preset LPD setting value, and a preset DNBR setting value, determining whether to trigger a reactor shutdown signal (S50).

Method of wafer grounding utilizing wafer edge backside coating exclusion area

Adhesive dental bleaching compositions containing polyvinylpyrrolidone

A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include a liquid component, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material.