Pyrite Slag Comprehensive Utilization Of Research

Pyrite cinder,a kind of red brown solid waste produced from calcimine Pyrite in the sulfuric acid production, contains Fe,SiO₂,CaO,S etc...。Although Pyrite cinder is industrial waste, it is also a kind of potential resource. In the 1980S, our government put forward"resourcilization, quantity reduction and innocuousness, as the technique policy to control solid waste pollution. It is the best way to control solid waste Pollution by utilizing and recycling the available and useful composition in the waste adequately. The main compositions in Pyrite cinder are resources that can be utilized. The comprehensive utilization can not only recover the source but also control the cinders pollution。Study on extract series iron oxide red products form Pyrite cinders, the novel process of the cinders comprehensive utilization has been developed.Based on a detailed investigation of present utilization and recovery of Pyrite cinder compared with the producing methods of iron oxide red, Yunfu Pyrite cinder through sizing-rinsing -- fine grinding--selective flocculation- reverse flotation to obtain iron oxide red products of the different quality and the use。This topic has proved that it is feasible to recover the series oxidation iron oxide red product from Pyrite cinder with systematical entire flow as well as the commercial test research。The series oxidation iron oxide red product has achieved the national corresponding product the quality specification。A large amount of wastewater will be produced throughout recovery iron oxide red process。According to the characters of the wastewater, the technology of recycling utilization of wastewater was adopted in the plan which the centralism returned。The commercial test research results indicate that the technology not only have no influence upon floatation quality and stability, but can also save water and reagent。The water resource can be utilized fully。The utilization of preparing iron oxide red by Pyrite cinder, which can not only control the cinders pollution but also can supply the new technology and new material. It has preferable social, economic and environmental benefits.