What caused the loss of aluminum fluoride in the preparation of potassium fluoaluminate?

It is the most basic to economize the aluminum fluoride in the preparation of cryolite.
The optimum quality fraction of fluorosilicic acid is 10 to 13. If the concentration of fluorosilicate is too high, it is the direct cause of the loss of aluminum fluoride.
Aluminum fluoride concentration is to be controlled, high concentrations can cause a waste of resources, fluosilicic acid concentration is too low will affect the produce silica gel particle size, too much at this stage if viscosity is not conducive to the whole process of filtering.
After filtration, the quality of the aluminum fluoride solution was 7%-9 %, and the high quality score of fluorinated aluminum solution directly affected the synthesis of the crystal.
If the solution quality of fluoride is too low, it will increase the amount of sewage treatment and cost, and as the quality of fluorosilicic acid increases, the silica gel particles generated will gradually increase.

In the process of the preparation of cryolite must be carried out in accordance with the certain proportion to add, and in the process of generating, step by step, also want to specify the fluosilicate concentration is directly affect the quality of cryolite problem.