The aluminum and silicon index of secondary brine exceeds the standard
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Recently, the ICP laboratory analysis showed that the aluminum and silicon in the secondary brine seriously exceeded the standard. The brine from the two sets of resin towers also exceeded the standard. I would like to ask you, what is the reason for the exceedance? Is there any good way to deal with it?
There is no particularly good method. The resin tower is basically unable to remove aluminum and silicon. Only some of the light brine from the tank should be drained and replaced.
There is no good way but to drain out some of the light brine from the tank and replace it.
Silicon and aluminum are almost all introduced as raw materials. Reducing the over-alkali content of the brine within the process range can reduce the silicon content. The main purpose is to analyze the components of the original salt. If it exceeds the standard, only a part of the dechlorinated light brine can be discharged, otherwise it will definitely have an impact on the ion membrane.
Possible sources of silicon: The quality of raw salt, the transport ship has been loaded with sand, the inner wall of the salt tank is damaged, and the quality of the salt water. Source of aluminum: Transport entrainment, water (aluminum is high in the earth's crust). Treatment method: Arrange and replace. The electrolyzer can reduce the load and stop the acid. for reference~
What kind of salt was used? Sea salt or mineral salt?
What kind of salt was used? Sea salt or mineral salt?