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With the awareness of environmental protection, governance of water pollution and solid waste recycling is the current focus of environmental protection. \more significant environmental significance. In recent years, the flocculant in the disposal of industrial and domestic sewage treatment and sediment, play an important role, and its role in the future will be even more prominent. The subject on in depth comprehensive survey of the basis of the current pyrite slag recycling and the status quo of the sulfuric acid plant, Wuhan Iron and Steel Mining Company Jinshandian Iron pyrite slag as raw material, the use of reduction roasting, acid leaching process Preparation ferrous sulfate, the introduction of new high-priced on the basis of preparation of polymeric ferric sulfate ions, preparation of composite poly ferric. To select the best modified program, preparing better performance, non-toxic composite poly ferric, in order to improve the level of comprehensive utilization of pyrite cinder. Will burn the residue under certain conditions, to restore, and then acid leaching to obtain the FeSO 4 solution to adjust the pH value of the heating and stirring pass into the O 2 , and adding appropriate amount of non-toxic catalyst, catalytic oxidation, hydrolysis polymerization of polymeric ferric sulfate (PFS). The polymerization process of the catalytic oxidation using a non-toxic catalyst CH-2, in order to eliminate the toxicity of the catalyst, Get advanced and rationality of the preparation process, to expand the scope of application of the PFS, pyrite cinder more effective use to provide technical support and theoretical basis. Homemade PFS based on the introduction of the PO 4 3 - Preparation of flocculant polyphosphate ferric sulfate (PPFS) as well as the introduction of PSI semi-finished products, under certain conditions, the system take flocculant PFSS (PFSS). In this study, a series of single-factor test, and homemade wastewater turbidity removal to determine the optimal process conditions. Test modified flocculant coagulation tests to determine the optimum coagulation conditions and compared with the PFS. Last modified flocculant the Mayinglong pharmaceutical wastewater turbidity removal, in addition to the COD test; the low turbidity oilfield wastewater turbidity test. The results showed that, after the modification, the PPFS and PFSS flocculation effect is better than the PFS. The ultraviolet and infrared absorption analysis flocculant molecular morphology analysis, preliminary study of the mechanism of flocculants modified. Through the study of the subject found that the use of the pyrite cinder PFS (PFS) composite poly ferric taken through a modified system, whether in the industrial waste recycling or develop better performance flocculation agent, have a theoretical and practical significance.
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