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Cryolite production method

A cryolite and product technology, applied in the field of cryolite production, can solve the problems of high raw material price, high production cost, complicated reaction process, etc., and achieve the effects of low production cost, easy control and simple process

Inactive Publication Date: 2006-02-22
DO FLUORIDE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional production process of cryolite is the fluoroaluminic acid soda ash method. In addition, there are clay brine method, sodium fluorosilicate method and sodium hydrofluoric acid aluminate method. The above-mentioned production methods all have high raw material prices, high production costs, and Disadvantages of complex reaction process

Method used

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  • Cryolite production method

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Comparison scheme
Effect test

Embodiment 1

[0012] Such as figure 1 As shown, the reaction process is as follows: first prepare a saturated solution of industrial salt, fully mix the solid ammonium fluoroaluminate with a particle size of 150 mesh and the saturated solution of industrial salt to make a paste, and perform a calcination reaction at 450°C. The reaction time is 2 hours. The ammonia gas and hydrogen chloride produced in the reaction process are absorbed and treated with water. The solid after the reaction is a cryolite product, which is packaged after cooling.

Embodiment 2

[0014] First prepare a saturated solution of industrial salt, fully mix the solid ammonium fluoroaluminate with a particle size of 200 mesh and the saturated solution of industrial salt to make a paste, and perform a calcination reaction at 500°C for 1.5 hours. The ammonia gas and hydrogen chloride produced in the process are absorbed and treated with water, and the solids after the reaction are cryolite products, which are packaged after cooling.

Embodiment 3

[0016] First prepare a saturated solution of industrial salt, fully mix the solid ammonium fluoroaluminate with a particle size of 250 mesh and the saturated solution of industrial salt to make a paste, and perform a calcination reaction at 550°C for 1 hour. The ammonia gas and hydrogen chloride produced in the process are absorbed and treated with water, and the solids after the reaction are cryolite products, which are packaged after cooling.

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Abstract

The invention discloses a process for producing cryolite by using ammonium fluoaluminate and industrial salt as raw materials for reaction in solid phase, and consists of making saturated solution from industrial salt, mixing solid ammonium fluoaluminate with industrial salt saturated solution homogeneously, proceeding calcinations reaction at 400-600 deg C for reaction 1-2 hours.

Description

technical field [0001] The invention relates to a method for producing cryolite, in particular to a method for producing cryolite by using ammonium fluoroaluminate, the waste slag from the surface treatment of aluminum profiles, as the main raw material. 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. The traditional production process of cryolite is the fluoroaluminic acid soda ash method. In addition, there are clay brine method, sodium fluorosilicate method and sodium hydrofluoric acid aluminate method. The above-mentioned production methods all have high raw material prices, high production costs, and The shortcoming of complex reaction process. Contents of the invention [0003] The purpose of the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/54
Inventor 李世江侯红军杨华春皇甫根利于贺华
Owner DO FLUORIDE CHEM CO LTD