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Method for producing granular cryolite

A production method and cryolite technology, which are applied in the directions of die extrusion granulation, aluminum fluoride, aluminum halide, etc., can solve the problems of restricting the technological progress and healthy development of the aluminum electrolysis industry, unfavorable automatic blanking and environmental protection requirements, and large flying losses. And other problems, to achieve the effect of pure appearance color, not easy to break, less flying loss

Inactive Publication Date: 2007-01-10
DO FLUORIDE CHEM CO LTD
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Problems solved by technology

With the progress of society and the development of aluminum electrolysis industry, the automation level of industrial production and environmental protection are getting more and more attention, and they need to be improved urgently. As the raw material of aluminum electrolysis - cryolite, its performance also needs to be improved, while the traditional Powdery cryolite and sandy cryolite have problems such as poor fluidity and high flying loss to varying degrees, which are not conducive to automatic cutting and environmental protection requirements, and to a large extent restrict the technological progress and healthy development of the world's aluminum electrolysis industry

Method used

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  • Method for producing granular cryolite
  • Method for producing granular cryolite

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Embodiment Construction

[0013] Such as figure 1 Shown, the production method of granular cryolite of the present invention comprises the following steps: add the qualified cryolite to the storage device with the lifting device, quantitatively add the material to the feeding screw feeder by the star feeder, and according to the granulation situation Adjustment: timely adjust the rotation frequency of the feeding screw, so that the cryolite enters the gap between the two rolls of the granulation device with a certain pressure, one set of roll shaft seats is fixed, and the other set of roll shaft seats slides, and the two are separated by hydraulic pressure. Close to each other, with the continuous operation of the rollers, the cryolite is extruded into flake materials; the flake materials are crushed by the crusher and enter the vibrating screen, the qualified granular materials are sent to the finished product post, and the cryolite fine powder is returned to the storage by the lifting device The devi...

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Abstract

The production process of granular cryolite and the cryolite is pelletized in a dry rolling pelletization apparatus. The cryolite produced in the method of the present invention has the following advantages: production under normal temperature, no decomposing of the product, high product quality stability, homogeneous and controllable grain size, high hardness, less breaking, pure color, low cost, low flying loss and high flowability. The produced cryolite is used mainly as flux in producing electrolyzed aluminum and has unique application superiority in automatic material feeding and protecting environment.

Description

technical field [0001] The invention relates to a production method of granular cryolite. Background technique [0002] The chemical name of cryolite is sodium fluoroaluminate, and the molecular formula is Na 3 AlF 6 , mainly used as a flux for aluminum electrolysis, wear-resistant filler for rubber and grinding wheels, opalescent agent for enamel, opacifier for glass and metal flux, etc. At present, cryolite mainly includes powdery cryolite and sandy cryolite. With the progress of society and the development of aluminum electrolysis industry, the automation level of industrial production and environmental protection are getting more and more attention, and they need to be improved urgently. As the raw material of aluminum electrolysis - cryolite, its performance also needs to be improved, while the traditional Powdery cryolite and sandy cryolite have problems such as poor fluidity and high flying loss to varying degrees, which are not conducive to automatic cutting and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/54B01J2/22
Inventor 李世江候红军杨华春皇甫根利刘慈军张富山连小闯
Owner DO FLUORIDE CHEM CO LTD
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