The content of water-insoluble matter in polyaluminum chloride directly affects whether the product of polyaluminum chloride is qualified or not. The water-insoluble matter of polyaluminum chloride is determined by different raw materials, different production processes and different drying processes. How to reduce the content of water-insoluble matter in polyaluminum chloride?

Most of the water-insoluble substances of polyaluminum chloride come from raw materials, so it needs to be controlled from the source. The traditional polyaluminum chloride is mostly produced by bauxite and industrial waste hydrochloric acid. There are a lot of impurities in these raw materials. If the production process is not well controlled, there will be a lot of water-insoluble substances in the later polyaluminum chloride.

In the production, the water-insoluble substance in polyaluminum chloride can be removed by natural sedimentation. By using the sedimentation effect of water-insoluble substance, the produced polyaluminum chloride solution will be placed for a period of time, and some water-insoluble substance will precipitate at the bottom. We can also use some treatment equipment, such as the plate and frame filter equipment. Through the plate and frame filter process of polyaluminum chloride, the water-insoluble matter can easily reach the standard of qualified products. Two kinds of water-insoluble matter treatment methods of polyaluminum chloride are used together, which can effectively reduce the content of water-insoluble matter in polyaluminum chloride.

The spray drying process of polyaluminum chloride also has very good effect of water insoluble matter removal. Therefore, the content of water insoluble matter of spray drying polyaluminum chloride is lower, while the water insoluble content of roller drying polyaluminum chloride is relatively high.

The content of water-insoluble matter in polyaluminum chloride will cause many effects, such as blocking the pipeline, affecting the water quality of treatment, etc.