Aluminum sulfate plays a variety of roles in the paper industry, including retention aids, filter aids, forming aids, anionic waste neutralizers, pH control agents, resin control agents, rosin sizing agents, water purification flocculants, and starch enhancement. Retention aids, etc. During the sizing process of paper, aluminum sulfate is used to adjust the pH of starch. Aluminum sulfate is one of the irreplaceable additives in the paper industry and has multiple functions.

In addition, the aqueous solution of caustic soda can also hydrolyze some organic matter to separate it from cellulose, thus meeting the needs of paper manufacturing. In the printing and dyeing industry, the role of caustic soda is similar to that in papermaking. In the smelting process, the main function of caustic soda is to use the characteristics of its soluble salt to convert the active ingredients in the ore into soluble substances to achieve separation from impurities and further processing.

Generally speaking, the functions of aluminum sulfate mainly include the following aspects: first, it uses the cationic nature of its trivalent aluminum to neutralize anionic waste; secondly, by adjusting the pH value, it ensures that the cationic additives play their maximum role; in addition, it also It can bridge the connection between starch and fiber, improve the retention rate of starch and enhance the binding force with fiber. However, although aluminum sulfate plays an important role in papermaking, it also has some side effects, such as the presence of free acids that may react with the hydroxyl groups of the fiber and cause the paper to become brittle.

Therefore, when using aluminum sulfate, choose good quality products and use them properly. It is an indispensable and excellent additive when making paper. It is worth mentioning that adding too much aluminum sulfate will cause the starch chains to be bridged by aluminum ions into a network, causing the density of the starch chains to be too high and ultimately causing the paper to become brittle. Therefore, you need to pay attention to dosage control when using aluminum sulfate.