Polyacrylamide (PAM) is a linear organic polymer and a flocculant used in water treatment. It can neutralize the opposite charge particles in the sewage, adsorb and bridge the suspended particles in the sewage, make the suspended particles form large flocculents, and accelerate the sedimentation speed of the suspended solids. Due to its good flocculation effect, it has been widely used in sewage treatment. In addition to its application in water treatment, PAM is also widely used in other industries, including the production of titanium dioxide. The following is a detailed answer to the role and type of polyacrylamide (PAM) for titanium dioxide.
In the production process of titanium dioxide, the purification process of titanium liquid includes precipitation, crystallization, separation, filtration, etc., and the precipitation is based on polyacrylamide (PAM) as the precipitant through PAMThe flocculation process removes insoluble impurities and colloidal particles, and the sulfate of iron, vanadium, chromium, manganese and other metals is used as soluble impurities, and most metals such as insoluble ilmenite and sand can be removed by natural gravity in the process of crystallization, hydrolysis, washing, etc. Silicon and aluminum colloidal compounds containing insoluble impurities, as well as early partially hydrolyzed titanium, although the content is not large, has high dynamic stability, so it is necessary to add an appropriate amount of polyacrylamide (PAM) to enhance the precipitation clarification process. The rational use of polyacrylamide (PAM) to produce titanium dioxide simplifies the production process and directly reduces the production cost. Polyacrylamide (PAM) has the advantages of fast sedimentation, simple process, and low production cost.
Titanium dioxide industrial wastewater is generally strong wastewater wastewater, due to the use of a large number of sulfuric acid and other wastewater chemical products in production. Therefore, cationic polyacrylamide (CPAM) and nonionic polyacrylamide (NPAM) are two types of polyacrylamide (PAM) commonly used in the production of titanium dioxide。 In order to obtain better treatment results and lower usage, the type of polyacrylamide (PAM) for wastewater treatment in titanium dioxide plants should be determined by small trial analysis.