Batching method for treating middle-low grade alumyte by bayer process

The invention provides an ore matching method of low grade bauxite in Bayer treatment. After aluminum-silicon ratio measurement of high and low grade bauxite, matching calculation is performed according to the target value of ore matching to obtain the matching ratio of the high and the low grade bauxite for the ore matching production. Through rational ore matching, the invention enables that the medium and low grade bauxite with the aluminum-silicon ratio lower than seven can also apply to the Bayer production process. The invention, if implemented, can economically and effectively process medium and low grade bauxite with Bayer production technology, thereby thoroughly utilizing low grade mineral resources, avoiding the mineral resource loss to the maximum, lengthening the service life of mineral mountains and having tremendous significance to the sustainable development of enterprises.

Carry scraper whole cross section mining method

The method includes the disposal of plucking zone and the operating line; the work for plucking preparation and the execution requirement; designing the operation of the back production and controlling the operation. The plucking zone is along the ore body. The operating line is disposed along vertical direction. The work for plucking preparation includes the floor flat and the slanting section plane. The operation of the back production includes following works: along the slanting section plane, the forklifts shovel and load mine in full-length; boosting by the rippers; and ore in three layers (upper, middle and lower) is one-off plucked. The method provides the features of retrieving rich and poor ore at the same time, reducing the resources loss, stabilizing the grade of the ore so as to reach the goal of balanced production, stabilization and high efficiency.

Valve guide pipe manufacturing method, valve guide pipe and automobile

The embodiment of the invention relates to a valve guide pipe manufacturing method, a valve guide pipe and an automobile, and belongs to the technical field of automobiles. The valve guide pipe manufacturing method comprises the steps that 0.6-1.0% of C, 1.0-4.0% of Cu, 1.0-3.0% of Mo, less than 3.0% of microelements and the balance Fe are mixed by mass to obtain a mixture; the mixture is pressedand formed to obtain a pressed product; the pressed product is sintered to obtain a first finished product; and the first finished product is sequentially subjected to primary inspection, vacuum oil immersion, turning, flaw detection and final inspection to obtain a target valve guide pipe. According to the valve guide pipe manufacturing method, the valve guide pipe and the automobile, the abrasion resistance and strength of the valve guide pipe are improved, and the problems that a valve is not closed tightly, and the power of an engine is reduced are solved. The first finished product is subjected ...

Leather needle eye tearing test fixture and test method thereof

The invention relates to a leather needle eye tearing test fixture which comprises a fixture head consisting of two clamps; the two clamps are respectively provided with a first through hole and a second through hole for pins to pass through. The invention also discloses a test method of the leather needle eye tearing test fixture. The test method utilizes the upward movement of pins to simulate the damage to the leather by the sewing needle eye, thereby obtaining the tearing strength and relevant performance parameters of the leather needle eye accurately and effectively. The test fixture has the advantages of simple structure, convenient operation, low cost and high practicality.

Insulating flame-retardant acid and alkali resistant rubber compound as well as preparation method and application thereof

The invention belongs to the technical field of rubber preparation, and particularly relates to an insulating flame-retardant acid and alkali resistant rubber compound as well as a preparation method and application thereof. The invention provides insulating flame-retardant acid and alkali resistant rubber. The insulating flame-retardant acid and alkali resistant rubber comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer; 5-10 parts of a reinforcing agent; 100 to 125 parts of an inorganic filler; 25 to 35 parts of a flame retardant; 40-50 parts of an inert filler; 10 to 15 parts of zinc borate; 15-25 parts of a plasticizer; 5-9 parts of an active agent; 1-2 parts of an emulsifier; 2-4 parts of a flow dispersing aid; 2-4 parts of paraffin; 3-5 parts of a silane coupling agent; 0.5 to 1 part of sulfur; 8.5 to 10.5 parts of a vulcanization accelerator; the inorganic filler is white carbon black, calcined clay treated by a silane coupling ...

Full section mining method using scraper

Flocculation and sedimentation method of superfine material

The invention provides a flocculation and sedimentation method of a superfine material. An annular medicament storage tank which rotates along a bridge frame is arranged on the bridge of a peripheral transmission type thickener; the medicament storage tank is positioned in the middle of a central feeder drum and on the upper part of a steady flow barrel; the feed outlet of the central feeder drumis sunk into the liquid level; and four 90-degree bent pipes are used as whirl outlet pipes to be uniformly distributed at the periphery of the central feeder drum, wherein the outlet section is morethan or equal to the section of the central barrel, and the outlet is arranged along the tangential direction. Eight administration lead-out holes are formed; four administration lead-out holes are formed inside the steady flow barrel and occupy 60 to 70 percent of the total medicament amount; and the other four administration lead-out holes are formed at the periphery of the steady flow barrel and occupy ...

Flocculation and sedimentation method of superfine material

The invention provides a flocculation and sedimentation method of a superfine material. An annular medicament storage tank which rotates along a bridge frame is arranged on the bridge of a peripheral transmission type thickener; the medicament storage tank is positioned in the middle of a central feeder drum and on the upper part of a steady flow barrel; the feed outlet of the central feeder drum is sunk into the liquid level; and four 90-degree bent pipes are used as whirl outlet pipes to be uniformly distributed at the periphery of the central feeder drum, wherein the outlet section is more than or equal to the section of the central barrel, and the outlet is arranged along the tangential direction. Eight administration lead-out holes are formed; four administration lead-out holes are formed inside the steady flow barrel and occupy 60 to 70 percent of the total medicament amount; and the other four administration lead-out holes are formed at the periphery of the steady flow barrel and ...

Antibacterial hand strap surface glue and preparation method thereof

The invention provides antibacterial hand strap surface rubber and a preparation method thereof. The antibacterial hand strap surface rubber comprises the following components in parts by weight: 90-110 parts of matrix rubber; 60-80 parts of a reinforcing filler; 4-8 parts of a softening agent; 5-9 parts of an active agent; 2.5 to 5 parts of an anti-aging agent; 4-8 parts of tackifying resin; 2-4 parts of a silane coupling agent; 1.5-2 parts of a vulcanizing agent; 1.5 to 2.5 parts of an accelerant; 15 to 22.5 parts of a m-methylene white adhesive system composition; 1.5 to 2.5 parts of an antibacterial agent; the meta-methylene white bonding system composition comprises 3-4 parts of a methylene donor, 2-3.5 parts of a methylene acceptor and 10-15 parts of white carbon black; the antibacterial agent, the white carbon black and the silane coupling agent are subjected to a stirring reaction at the temperature of 80-100 DEG C before use, and the antibacterial agent is an antibacterial agent ...