Ask for advice on the production of sodium fluorosilicate using soda ash and fluorosilicic acid
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Since our factory cannot treat sewage, we can only consider making sodium fluorosilicate from soda ash or caustic soda. However, the current cost of caustic soda is too high, so we use soda ash. . . . . . The problem is that after a long trial run, the synthesis was carried out according to the normal reaction proportions and with a slight excess of acid. Why does it always happen that the synthesis and crystallization are good in the first tank, but in the subsequent tanks after continuous synthesis, it begins to become muddy, difficult to filter, and has poor crystallization? ? ? ? ? ? ? ? Ask God for guidance! ! ! ! ! ! !
What is the quality of soda ash? Is it related to it?
We have a testing department and the soda ash raw material tests are normal!!!!
:Q Looking for guidance. . . . .
Is there any professional expert who can guide me?
I'm not familiar with your process conditions, so I can't say much. You can compare whether the process operations of each kettle are consistent, whether the operating parameters are consistent, etc. Identify and improve deficiencies through comparison.
The key is that the acid should be clear, the synthetic acidity should be well controlled, and the silica gel should be separated before filtration. This is how we do it, and now we are ready to switch to the Glauber's Salt method:)