The method of producing arenaceous cryolite by clay salinity method

The shortage of traditional crystal crystal production process
The ice crystals have natural ice crystals and artificial ice crystals. It is the aid of aluminum smelting, and the world's aluminum smelting industry mainly USES artificial ice crystals.
Traditional production process of synthetic cryolite, soda ash, aluminum fluoride acid method, and the deficiency of the production process are the raw materials used aluminum hydroxide and soda ash at present domestic are scarce, which causes a lot of factories for lack of raw materials production, aluminum fluoride acid synthesis reaction, operation is not easy to control, easy to take can of injuries;
Because the whole production process is carried out under acidic conditions, and the temperature is high, the equipment is seriously corroded, and the acid waste residue is produced and the environment is polluted.
The fine grain of crystal grains produced by this method is not good for aluminum smelting.
Raw materials are expensive and expensive.

A brief introduction to the method of production of sand - shaped cryolite

Aiming at the disadvantages of the above production methods, this paper proposes a clay and salt substitute shortage of aluminum hydroxide and soda ash as raw material to produce a new method of cryolite - clay sand shape bittern method, it is easy to control production, less "three wastes" pollution, not only cost reduction, quality improvement and cryolite.

The reaction formula of the synthesis of cryolite (sodium fluoroaluminate) was prepared with clay mineral powder, salt and hydrofluoric acid
Its production process as follows first prepared with hydrochloric acid leaching, leaching liquid when heated to join clay mineral powder, leaching of aluminium, generate alcl3 solution, the solution by sedimentation separation to remove reactive material, aluminium chloride solution;
A mixture of aluminum chloride and sodium chloride is prepared by adding salt to aluminum trichloride in normal temperature and pressure.
The crystal slurry was generated by the mixed halogen solution and hydrofluoric acid reaction in normal temperature and atmospheric pressure.
Then the crystal slurry is filtered, and the finished products are dry.
The raw clay mineral powder can be used in soft clay or hard clay or bauxite. The content of AL2O3 is greater than 25% and the fineness is above 80.