Special rare earth alloy silver-brazing filler metal

The invention relates to a special rare earth alloy silver-brazing filler metal applied to the brazing of the metal workpieces such as copper and copper alloy, cemented carbide, carbon steel, stainless steel, nickel-based alloy and the like, and belongs to a moderate temperature brazing material. At present, no silver-brazing filler metal has excellent performance and low price, so that the development of the brazing field is obstructed. The special rare earth alloy silver-brazing filler metal comprises the following components in percentage by weight: 25 to 35 percent of Ag, 32 to 38 percentof Cu, 1 to 2.5 percent of Sn, 0.5 to 2.0 percent of Ni, 0.01 to 1 percent of Mn, 0.1 to 1.0 percent of Li, 0.01 to 0.5 percent of Si, 0.001 to 0.1 percent of mixed rare earth, and the balance of Zn,wherein the mixed rare earth consists of lanthanum and cerium. The special rare earth alloy silver-brazing filler metal has the advantages of high cost performance, low fusion temperature of brazing filler ...

Tobacco stem preprocessing method used in papermaking method sheet line

The invention discloses a tobacco stem preprocessing method used in a papermaking method sheet line. The tobacco stem preprocessing method includes the steps that tobacco stems are washed and dampened through a stem soaking machine after winnowing sundry removing is carried out on the tobacco stems, solid-liquid separation is carried out on the washed tobacco stems, and then the washed tobacco stems are conveyed into a feeding steam lock of a pressure stem moistening machine, wherein the frequency of a motor of the feeding steam lock ranges from 30 Hz to 50 Hz, the pressure of working steam in a drum of the pressure stem moistening machine ranges from 0.20 MPa to 0.50 MPa, the temperature ranges from 120 DEG C to 200 DEG C, the frequency of a spiral motor ranges from 30 Hz to 50 Hz, and the operating time of the tobacco stems in the drum ranges from 40 s to 60 s; the tobacco stems are conveyed to a discharging vibrating groove through a discharging steam lock, wherein the frequency of a ...

Preparation method of melon and fruit perfume for cigarettes

The invention discloses a preparation method of melon and fruit perfume for cigarettes. The preparation method comprises the following steps: (1) smashing melon and fruit raw materials, and carrying out solid-liquid separation so as to obtain fruit juice and solid fruit flesh; (2) carrying out reduced pressure concentration on the fruit juice to remove water so as to obtain fruit juice extract; (3) combining the fruit juice extract and the solid fruit flesh, and adding 3-6 times by weight of alcoholic solution with the concentration of 70%-80% for extraction so as to obtain a primary extract solution and residues, wherein the extraction temperature is 50-80 DEG C, and the extraction time is 1-4 hours; (4) adding 3-6 times by weight of alcoholic solution with the concentration of 40%-50% to the residues for extraction, and carrying out solid-liquid separation so as to obtain a secondary extract solution, wherein the extraction temperature is 50-80 DEG C, and the extraction time is 1-4 hours ...

Processing method for flue-cured tobaccos and aromatic tobacco module in blended type cigarettes

The invention discloses a processing method for flue-cured tobaccos and an aromatic tobacco module in blended type cigarettes. The processing method includes the steps that the flue-cured tobaccos and the aromatic tobacco module are subjected to a leaf tobacco fabrication processing working section, a burley tobacco dryer baking processing working section and a cut tobacco fabrication processing working section respectively. According to the processing method, the flue-cured tobaccos and the aromatic tobacco module in a blended type cigarette leaf set are processed individually, a burley tobacco dryer is creatively mixed to the processing process, the Maillard reaction in the baking process is fully utilized, therefore, the style characteristic of baking fragrance of the flue-cured tobaccos and the aromatic tobacco module is highlighted, the processing quality of the flue-cured tobaccos and the aromatic tobacco module is improved, and the compatibility between the flue-cured tobaccos and ...

Low-silver and oxidation-resistant Sn-Ag system lead-free solder

The invention discloses a low-silver and oxidation-resistant Sn-Ag system lead-free solder, relating to a low-silver and oxidation-resistant lead-free solder and mainly solving the problems that the traditional Sn-3.5Ag solder has poor oxidation resistance and the production cost is high due to high silver content. The low-silver and oxidation-resistant Sn-Ag system lead-free solder is prepared from Ag, Mn, Ni, In, P, Y and Sn. The wetting angle of the low-silver and oxidation-resistant Sn-Ag system lead-free solder on a Cu substrate is 35-45 DEG; the shear resistant strength of the obtained BGA (Ball Grid Array Package) welding spot is 34-60MPa; under the same area exposed in the air and after the solder is maintained at the temperature of 260 DEG C for 180min, the generation amount of asurface oxidation film is reduced by 12-25 percent compared with that of Sn-3.5Ag; meanwhile, the silver content in the solder is reduced, thus the production cost of the solder is reduced. The low-silver ...

Production method of rolled tobacco sheet

The invention discloses a production method of a rolled tobacco sheet. In the invention, Maillard reaction catalysts such as phosphate, monohydric phosphate, dihydrogenphosphate and the like are used to improve the contents of Maillard reaction substrates in rolled sheet cabo-powder raw materials; and the aroma characteristic is given to the rolled sheet and the aroma amount is improved by a Maillard reaction capable of on-line improving the rolled sheet through a sheet-drying device with a temperature controlled function. The invention can give the aroma characteristic to the rolled sheet and improve the aroma amount so that smoke is soft and delicate, the irritation and miscellaneous gases of the sheet are lightened, taste is better and the comfort level of the suction of the sheet is improved.

Purification method of tobacco stem extracting solution in paper-making reconstituted tobaccos

The invention discloses a purification method of a tobacco stem extracting solution in paper-making reconstituted tobaccos. The method comprises the steps as follows: A, adding I solution with 2% the weight of the tobacco stem extracting solution at a constant speed and controlling the adding time within 5 min, and then standing the mixed solution for 5 min at the temperature of 60 DEG C; B, adding II solution with 2% the weight of the tobacco stem extracting solution at a constant speed and controlling the adding time within 5 min, and then standing the mixed solution for 10 min at the temperature of 60 DEG C; C, adding the mixed systems into a centrifugal machine for centrifugal separation and then vacuum concentrating the tobacco stem solution and the tobacco powder solution in the proportion of 5:95 to 20:80 into a concentrated solution; performing coating, drying and dividing and cutting, then forming reconstituted tobacco products, wherein the I solution is formed in the mode that ...

Flue-cured tobacco raw material sensory quality evaluation method applicable to mixed type cigarettes

The invention discloses a flue-cured tobacco raw material sensory quality evaluation method applicable to mixed type cigarettes. The sensory quality evaluation method comprises ten evaluation indexes including aroma, aroma amount, miscellaneous gas, smoke concentration, strength, irritation, aftertaste, combustibility, gray and a controlling index, wherein the controlling index is a comprehensive index of tobacco raw materials applicable to the mixed type cigarettes. According to the sensory quality evaluation method, sensory evaluation of the quality of the flue-cured tobacco raw materials is quantified for the first time to judge the applicability in a mixed type cigarette leaf group formula; each index is graded according to nine points; aiming at the emphasis of the flue-cured tobacco raw material needed by the mixed type cigarettes, the weight of the final score of each index sub-item is different, the statistical total score is converted by a centesimal system and the weights of all ...

Method for producing tobacco sheets by paper making method

The invention relates to a method for producing tobacco sheets by a paper making method, which is characterized by using acidic proteinase, pectase and amylase to carry out biological degradation on sheet materials, improving the content of Maillard reactants in a tobacco extraction liquid, utilizing Maillard reaction catalysts, namely phosphate, phosphate, dibasic alkaliine, dihydric phosphate, propanediol and the like, and regulating and controlling the condition of reaction medium, on-line promoting the Maillard reaction in a tobacco aqueous solution, and improving the content of Maillard reaction intermediates and products in concentrated solution. The method for producing the tobacco sheets by the paper making method can reduce acrimony and offensive taste of the sheets, coordinate smell, improve after taste and improve comfort level of sheet suction.

Tobacco humectant achieving gradient distribution of molecular weights

The invention discloses a tobacco humectant achieving gradient distribution of molecular weights. Raw materials of the tobacco humectant are distributed in a gradient mode according to the magnitudes of the molecular weights, and the tobacco humectant is composed of, by weight, 10%-40% of micromolecule humectants, 0.01%-2% of medium-molecular-weight humectants, 0.001%-0.05% of high-molecular-weight humectants and 57.95%-89.98% of water. According to the sequence from high molecular weights to low molecular weights, the raw materials of the tobacco humectant are sequentially dissolved in the water so as to form a homogeneous phase solution, and the tobacco humectant is obtained. The tobacco humectant is added to cigarette feeding liquid or expanded cut tobacco feeding liquid or cut stem feeding liquid or papermaking-method slice coating liquid according to the ratio of 1%-50%, the tobacco humectant is applied to cigarettes in a fed mode, and functions of the tobacco humectant are given into ...

Method for producing tobacco sheets by paper making method

The invention relates to a method for producing tobacco sheets by a paper making method, which is characterized by using acidic proteinase, pectase and amylase to carry out biological degradation on sheet materials, improving the content of Maillard reactants in a tobacco extraction liquid, utilizing Maillard reaction catalysts, namely phosphate, phosphate, dibasic alkaliine, dihydric phosphate, propanediol and the like, and regulating and controlling the condition of reaction medium, on-line promoting the Maillard reaction in a tobacco aqueous solution, and improving the content of Maillard reaction intermediates and products in concentrated solution. The method for producing the tobacco sheets by the paper making method can reduce acrimony and offensive taste of the sheets, coordinate smell, improve after taste and improve comfort level of sheet suction.

Solder without cadmium and silver

Systematized blended cigarette processing method

The invention discloses a systematized blended cigarette processing method. The method is carried out according to the following steps: (A) the processing of burley modules: burley is processed according to modules, and is divided into three modules according to the processing characteristics and quality characteristics of the burley, and the three modules are respectively processed by pertinent techniques, so that the characteristics of the modularized tobacco leaves can be sufficiently exerted; and after the burley modules undergo burley processing, burley leaf group components corresponding to a specific brand are formed in a leaf storage area according to the requirement of a formula; (B) the processing of cured tobacco modules: the blended cured tobacco modules correspond to specific blended specifications, one specification only has one cured tobacco module, and after being preprocessed, the blended cured tobacco modules are stored in a leaf storage tank; (C) aromatic tobacco and ...

Cadmium-free silver solder containing indium and silicon

The invention relates to an indium and silicon-contained cadmium-free silver filler metal, which belongs to the field of medium-temperature brazing materials. The cadmium-free silver filler metal consists of chemical components accounting by weight percentage: 36 percent to 40 percent of copper, 25 percent to 35 percent of zinc, 0.5 percent to 4.5 percent of indium, 0.01 percent to 0.5 percent of silicon and 0.001 percent to 0.1 percent of microalloy elements and the allowance is silver; wherein, the microalloy elements are one or more of the alloying elements such as Ni, Mn, Sb, Zr, B, Ce, La, etc. The components are smelted and cast by adopting a conventional medium-frequency induction furnace, and then the required filler metal can be obtained by extruding, drawing, forming and washing the processed components. The temperature at which the indium and silicon-contained cadmium-free silver filler metal of the invention is melted ranges from 640 to 760 DEG C. By removing the hazardous element-cadmium ...

Harm reducing agent made from Chinese herbal medicines for cigarettes

A Chinese-medicinal additive of cigarette for decreasing the harm of cigarette is prepared from 4 Chinese-medicinal materials including perilla, astragalus root, straight ladybell root and honeysuckle flower through extracting their active components. It is applied by uniformly attaching it onto tobacco shreds.

Detoxifying additive for filtering tips

A detoxicating additive for the tip filter of cigaretter in order to decrease the contents of tar, Co and nitrosamine in cigarette's smoke is prepared from tea leaf, haw, phyllanthus, embolica and myrobalan through extracting their active components in the form of liquid, concentrating and drying to obtain particles.

Auxiliary device for burley tobacco baking experiment and experimental method

The invention discloses an auxiliary device for a burley tobacco baking experiment and an experimental method. The auxiliary device for a burley tobacco baking experiment is characterized in that a mesh-shaped cage for containing burley tobacco leaves for experiments is arranged; the mesh-shaped cage for containing burley tobacco leaves for experiments and the burley tobacco leaves synchronize on a burley tobacco leaf baking production line to finish the baking process; in the baking process, the mesh-shaped cage is fed from a burley tobacco feed port and enters a burley tobacco leaf drying zone together with a burley tobacco leaf drier mesh tape and is taken out from a cooling zone. By the adoption of the auxiliary device and the experimental method, 0.5-2kg of burley tobacco leaves is enough for completely simulating the burley tobacco baking processing of a normal burley tobacco drier which needs more than 1000kg of burley tobacco leaf tissues, the multiple experimental baking conditions ...

Low-silver Sn-Ag-Cu unleaded brazing filler metal

The invention discloses a low-silver Sn-Ag-Cu unleaded brazing filler metal and relates to an unleaded brazing filler metal. By means of the low-silver Sn-Ag-Cu unleaded brazing filler metal disclosed by the invention, the problems that a conventional Sn-3.5Ag-0.7Cu brazing filler metal has poor oxidation resistance and high brazing filler metal cost because of high silver content are solved. The low-silver Sn-Ag-Cu unleaded brazing filler metal disclosed by the invention is made from Ag, Cu, Mn, Ni, In, P, Y and Sn. A wetting angle of the low-silver Sn-Ag-Cu unleaded brazing filler metal on a Cu base plate is 10-15 DEG; the shearing strength of an obtained BGA (Ball Grid Array) welding spot is 62-74MPa; under the same exposed area in the air, the surface oxidation film formation amount is decreased by 15-20% compared with that of the Sn-3.5Ag-0.7Cu brazing filler metal after the temperature of 260 DEG C is maintained for 180 minutes; in the meantime, the production cost of the brazing ...

Preparation method of rolled tobacco sheet

The invention discloses a preparation method of a rolled tobacco sheet, comprising the following steps of: a. mixing burley tobacco stems, aromatic tobacco stems and flue-cured tobacco stems to obtain mixed tobacco stems; b. mixing burley tobacco, aromatic tobacco and flue-cured tobacco powder to obtain mixed tobacco powder; c. evenly mixing cocoa powder and CMC (Carboxymethylcellulose) accordingto the proportion of 1:3-1:10 to obtain a mixed material; d. discharging the mixed tobacco stems and the mixed tobacco powder according to the proportion of 1:4-4:1 to obtain mixed powder; and e. quantitatively adding the mixed powder to a wet and dry material mixer, simultaneously adding a liquorice extract and decocting into a liquorice extract solution, squeezing, drying, cutting into shreds, drying the shreds and preparing into the tobacco sheet. The invention can effectively endow the tobacco sheet with characteristic aroma which is consistent with the style of blended type tobacco, promote ...

Harmless tobacco sheets

A low-harm tobacco sheet is prepared from the conventional tobacco sheet, and 4 Chinese-medicinal materials including gingko leaf, as paragus root, astragalus root, etc through extracting the active components from said Chinese-medicinal materials, processing them to become powder or liquid, and proportionally applying it to said conventional tobacco sheet.

Device for improving charging front blade size uniformity and method thereof

The invention discloses a device for improving charging front blade size uniformity and method thereof. The device comprises a vibrating screen arranged on a rack, the vibrating screen is provided with a first layer screen, a second layer screen and a third layer screen from top to bottom, and the meshes of all the screens are gradually reduced from top to bottom; a charging device is arranged above one end of the vibration screen, all the screens at the other end of the vibration screen are provided with a discharging port; a plurality of loosing rollers are arranged between the charging device and the first layer screen in parallel, and the axis of the loosing roller is arranged along the width direction of the vibration screen. The invention can effectively improve uniformity of humidifying and charging of subsequent process and also effectively reduces shred growth rate of tobacco shred after being cut.

Tobacco leaf threshing and redrying and impurity winnowing processing technology and equipment

The invention discloses a tobacco leaf threshing and redrying and impurity winnowing processing technology and equipment. The tobacco leaf processing technology comprises the following steps of winnowing a tobacco leaf material which is moisturized with hot air to obtain a tobacco leaf main material and tobacco leaf impurities, keeping the tobacco leaf main material on a tobacco leaf main material production line, and manually removing impurities from the separated tobacco leaf impurities to obtain a tobacco leaf residual material. The technology is characterized in that the tobacco leaf residual material and the tobacco leaf main material are kept in a separated state, the tobacco leaf residual material is conveyed to a fragment drying unit, and the tobacco leaf residual material and fragments are dried, screened and packaged together. The tobacco leaf residual material obtained through winnowing and impurity removal is separated, and the quality of the tobacco leaf main material is guaranteed ...

Device for improving charging front blade size uniformity and method thereof

The invention discloses a device for improving charging front blade size uniformity and method thereof. The device comprises a vibrating screen arranged on a rack, the vibrating screen is provided with a first layer screen, a second layer screen and a third layer screen from top to bottom, and the meshes of all the screens are gradually reduced from top to bottom; a charging device is arranged above one end of the vibration screen, all the screens at the other end of the vibration screen are provided with a discharging port; a plurality of loosing rollers are arranged between the charging device and the first layer screen in parallel, and the axis of the loosing roller is arranged along the width direction of the vibration screen. The invention can effectively improve uniformity of humidifying and charging of subsequent process and also effectively reduces shred growth rate of tobacco shred after being cut.

Preparation method of rolled tobacco sheet

The invention discloses a preparation method of a rolled tobacco sheet, comprising the following steps of: a. mixing burley tobacco stems, aromatic tobacco stems and flue-cured tobacco stems to obtain mixed tobacco stems; b. mixing burley tobacco, aromatic tobacco and flue-cured tobacco powder to obtain mixed tobacco powder; c. evenly mixing cocoa powder and CMC (Carboxymethylcellulose) according to the proportion of 1:3-1:10 to obtain a mixed material; d. discharging the mixed tobacco stems and the mixed tobacco powder according to the proportion of 1:4-4:1 to obtain mixed powder; and e. quantitatively adding the mixed powder to a wet and dry material mixer, simultaneously adding a liquorice extract and decocting into a liquorice extract solution, squeezing, drying, cutting into shreds, drying the shreds and preparing into the tobacco sheet. The invention can effectively endow the tobacco sheet with characteristic aroma which is consistent with the style of blended type tobacco, promote ...

Solder without cadmium and silver

The invention discloses a non-cadmium-silver solder with tin, silicon and composite rare earth element, which comprises the following parts: 28%-32% copper, 30%-34% zinc, 0. 5%-5% tin, 0. 01%-1% silicon, 29%-41% silver, 0. 001%-0. 1% rare earth element lanthanum and cerium and less than 0. 01% impurity. The making method comprises the following steps: setting the fusing temperature of the solder at 600-745 deg. c; adopting intermediate frequency induction furnace to fuse and cast; squeezing; drawing; moulding; obtaining the product to satisfy the request of RoHS order; eliminating the pollution for environment. The invention can replace silver solder such as BAg50CuZnCd, BAg45CuZnCd and BAg45CuZn completely to use with FB102, which can be applied to weld the copper and copper alloy, hard alloy, stainless steel pipe with good wetness and fluidity and mechanic strength.

Production method of rolled tobacco sheet

The invention discloses a production method of a rolled tobacco sheet. In the invention, Maillard reaction catalysts such as phosphate, monohydric phosphate, dihydrogenphosphate and the like are used to improve the contents of Maillard reaction substrates in rolled sheet cabo-powder raw materials; and the aroma characteristic is given to the rolled sheet and the aroma amount is improved by a Maillard reaction capable of on-line improving the rolled sheet through a sheet-drying device with a temperature controlled function. The invention can give the aroma characteristic to the rolled sheet and improve the aroma amount so that smoke is soft and delicate, the irritation and miscellaneous gases of the sheet are lightened, taste is better and the comfort level of the suction of the sheet is improved.

Special rare earth alloy silver-brazing filler metal

The invention relates to a special rare earth alloy silver-brazing filler metal applied to the brazing of the metal workpieces such as copper and copper alloy, cemented carbide, carbon steel, stainless steel, nickel-based alloy and the like, and belongs to a moderate temperature brazing material. At present, no silver-brazing filler metal has excellent performance and low price, so that the development of the brazing field is obstructed. The special rare earth alloy silver-brazing filler metal comprises the following components in percentage by weight: 25 to 35 percent of Ag, 32 to 38 percent of Cu, 1 to 2.5 percent of Sn, 0.5 to 2.0 percent of Ni, 0.01 to 1 percent of Mn, 0.1 to 1.0 percent of Li, 0.01 to 0.5 percent of Si, 0.001 to 0.1 percent of mixed rare earth, and the balance of Zn, wherein the mixed rare earth consists of lanthanum and cerium. The special rare earth alloy silver-brazing filler metal has the advantages of high cost performance, low fusion temperature of brazing filler ...

Method for preparing reconstituted tobacco by using abandoned gunny bag as fibrous raw material

The invention discloses a method for preparing reconstituted tobacco by using an abandoned gunny bag as a fibrous raw material. The method is characterized in that papermaking tobacco sheet is prepared by using the abandoned gunny bag as the additional fibrous raw material and using flue-cured tobacco powder, tobacco stem and the like as tobacco raw materials. According to the method disclosed by the invention, the papermaking reconstituted tobacco is prepared, masses of abandoned gunny bags in a tobacco enterprise can be processed, the cost is reduced, and better physical characteristics and sensory quality of the papermaking reconstituted tobacco are maintained.

Preparation method of degraded starch tobacco humectant with mixed hydrolysis degrees

The invention discloses a preparation method of degraded starch tobacco humectant with mixed hydrolysis degrees. The preparation method comprises the following steps of (1) adding starch into water with 4-times mass, stirring and mixing the starch and water, heating the mixture to 70 to 100 DEG C, and maintaining the temperature for 1h to 2h so as to enable the starch to be adequately gelatinized; (2) adding hydrochloric acid solution, uniformly stirring, heating the mixture to 60 to 90 DEG C to be reacted for 0.5h to 5h, cooling the mixture, adding alkali to neutralize the excessive acid to be neutral to obtain a starch degradation product with different hydrolysis degrees; (3) compounding the short-time hydrolyzed starch, the appropriately-hydrolyzed starch and the long-time hydrolyzed starch according to a ratio to obtain the mixed degraded starch tobacco humectant. The prepared humectant is rich in polyol and good in moistening effect; by containing polysaccharide molecules of different ...

Method for measuring tobacco protein

The present invention discloses a method for measuring the protein in the tobacco, includes extraction, digest, and continuous flowage analysis. Compared with the prior art, the present invention has simple and quick operation, and more exact determination result. Using the method to determine the protein can save a plenty of labor force. Since at present the flowage analyzer has been popularized, the method can be applied and popularized in the industry.

Production of nano-catalyst

Method for treating American burley tobacco

The invention discloses a method for treating American burley tobacco, comprising the steps of: adding internal materials to burley tobacco leaves in twice in a loosening and moisturizing step and a charging step respectively, carrying out dry treatment on the tobacco leaves in a burley tobacco dryer, and adding external materials and then directly mixing with flue-cured tobacco and aromatic tobacco in a formulation of a product; wherein, in the loosening and moisturizing step, reducing sugar, humectant, Maillard reaction intermediate and plant extracting liquid are added to internal material liquid, the moisture content of the moisturized tobacco leaves is 24-28%, the tobacco leaves are stored in a storage tank for 2-4h and discharged, then liquorice paste liquid and cocoa powder liquid are added on line in the charging step, and after charging, the moisture content of the tobacco leaves is 32-38%. The method ensures that Maillard reaction can be fully carried out on a burley tobacco sheet ...