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Method for Quickly Removing Insoluble Matter in Polyaluminum Chloride

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The production of raw materials such as aluminum ore and calcium aluminate powders has different origins, resulting in very different liquid products. Most of the liquid products made of raw materials have more insoluble substances, which are difficult to settle, which not only affects the appearance of the product but reduce the performance of the product.

The production of poly aluminum chloride liquid needs to remove the insoluble matter in the end. There are two main methods:

[caption id="attachment_353133" align="aligncenter" width="600"]PAC Liquid PAC Liquid[/caption]

The first is the natural settlement method, which usually takes about 7-10 days, and the production cycle is relatively long, which affects the output of the product. It is not suitable for some manufacturers with a small footprint, and for some products with high basicity, due to the product The viscosity is relatively large, and the insoluble matter is difficult to separate. Even after a few days of precipitation, it still cannot meet the relevant requirements of the national standard; another method is to use a plate and frame filter press, which not only requires a large investment, consumes a large amount of electricity, but also requires products The salinity cannot be too high (generally below 80%), which limits the scope of application of the product. Polyacrylamide can be used as a coagulant to remove insoluble in polyaluminum chloride:

Polyacrylamide (pam) is a widely used organic polymer flocculant. It is generally used as a coagulant. During the coagulation process, the particle size of the floc is increased by charge neutralization and adsorption bridging to accelerate its sedimentation. Improve the coagulation effect. The use of organic polymer flocculants such as polyacrylamide is a method to accelerate the precipitation of insoluble in poly aluminum chloride. However, the effect of ordinary polyacrylamide on accelerating the precipitation of insoluble in poly aluminum chloride is not obvious. There have been reports about the application of polyacrylamide in the preparation of liquid polyaluminum chloride, but there has been no large-scale investment. The effect of modified polyacrylamide on the sedimentation rate of insoluble in liquid polyaluminum chloride and its coagulation performance provides a practical and effective solution to the problems commonly encountered in the actual production process of liquid polyaluminum chloride.

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