混凝法处理锰矿选矿废水及最优水力条件的试验研究

选取聚合氯化铝(PAC)、聚合硫酸铁(PFS)和聚丙烯酰胺(PAM)作为混凝剂,采用正交试验,以去浊率与去锰率作为综合评价指标,探讨了不同混凝剂处理锰矿选矿废水的效果及最佳的水力条件。结果表明,以PAC作为混凝剂时,对混凝效果影响最大的是快搅时间,其最优G值和GT值:混合G值1643.1s-1,GT值147879.0;反应G值325.2s-1,GT值195120.0。以PFS作为混凝剂时,对混凝效果影响最大的是投药量,其最优G值和GT值:混合G值3265.0s-1,GT值97950;反应G值188.7s-1,GT值56610.0。以PAM作为混凝剂时,影响最大的是投药量,其最优G值和GT值:混合G值3265.0s-1,GT值293850.0;反应G值277.7s-1,GT值333240.0。并且PAM对锰矿选矿废水的处理效果最优,去浊率与去锰率分别为94.6%和96.4%。

Trial Study on Treatment of Manganese Mineral Processing Wastewater with Coagulationand Optimal Hydraulic Conditions

In this paper,discussion was made on the effect and optimal hydraulic conditions for the treatment of manganese mineral processing wasterwater by using PAC,PFS and PAM as the coagulation,applying the orthogonal experiment and taking the removal rate of turbidity and manganese as the comprehensive evaluation indicator. The results showed that greatest influence factor on the coagulative effect is the fast stirring time when PAC is used as the coagulant,its optimal value of G and GT is respecively 1643.1s-1 and 147879.0 in the fast mixing and 325.2 s-1 and 195120.0 in slow mixing. When PFS is used as the coagulant,the greatest influence factor on the coagulative effect is the dosage,its optimal value of G and GT is respectively 3265.0 s-1 and 97950 in the fast mixing and 188.7s-1 and 56610.0 in the slow mixing. When PAM is used as the coagulant,the greatest influence factor on the coagulative effect is the dosage; the optimal value of G and GT is respectively 3265.0 s-1 and 293850.0 in the fast mixing and 277.7 s-1 and 333240.0 in the slow mixing. The optimal coagulant is PAM. The removal rate of turbidity and manganese is respectively 94.6% and 96.4%.