A novel polymerized aluminum ferrosilicate flocculant(PSAFC)was prepared by using the acid leaching and alkali dissolved method based on the utilization of the natural composition of Si,Al,Fe,and Ca in coal gasification fine slag.Based upon the optimized preparation conditions,PSAFC was characterized by using X-ray fluorescence spectroscopy(XRF),X-ray diffraction(XRD),and Fourier-transform infrared spectroscopy(FT-IR).It was found that PSAFC was an amorphous,non-crystalline polymer inorganic flocculant formed by the aggregation of Si,Al,Fe,Ca elements.Subsequently,the flocculation performance of PSAFC was investigated by using kaolin suspension as the target.The results revealed that PSAFC exhibited optimal performance for kaolin suspensions with the removal efficiency more than 95%under the optimal conditions of the initial turbidity of 1 439 NTU,the mass concentration of PSAFC of 50 mg/L and pH 10.This investigation offers a novel approach and method for the comprehensive utilization of coal gasification fine slag and the preparation of polymer inorganic flocculants with high-performance.
关键词
煤气化细渣/聚合硅酸铝铁絮凝剂/高岭土悬浊液/浊度去除率/高分子无机絮凝剂
Key words
coal gasification fine slag/PSAFC/kaolin suspension/turbidity removal rate/polymer inorganic flocculant
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