磁混凝沉淀工艺处理煤矿矿井水实验研究

Experimental study on treatment of coal mine water by magnetic coagulation sedimentation process

采用磁混凝沉淀工艺处理某煤矿矿井水,考察了不同PAM型号及投加量、PAC投加量、磁粉投加量等因素对处理效果的影响,通过3因素4水平正交实验筛选了最佳工艺条件,并分析了影响因素的主次关系。结果表明:BJ61414、BJ70010、JF高3种型号PAM均有较好处理效果,其最佳工艺条件分别为:BJ61414 PAM投加量0.6 mg/L,PAC投加量60 mg/L,磁粉投加量300 mg/L;BJ70010 PAM投加量0.4 mg/L,PAC投加量60 mg/L,磁粉投加量500 mg/L;JF高PAM投加量0.3 mg/L,PAC投加量40 mg/L,磁粉投加量400 mg/L。在最佳工艺条件下应用磁混凝+微滤组合工艺处理矿井水,出水水质均优于拟采用的预期出水水质限值。

The magnetic coagulation and sedimentation process was used to treat mine water in a coal mine,and the effects of different PAM models and dosage amounts,PAC dosage amounts and magnetic powder dosage amounts on the treatment effect were investigated. The results showed that BJ61414,BJ70010 and JF high three types of PAM have good treatment effect,and their optimal process conditions are:BJ61414 PAM dosage 0.6 mg/L,PAC dosage 60 mg/L,magnetic powder dosage 300 mg/L;BJ70010 PAM dosage 0.4 mg/L,PAC dosage 60 mg/L,magnetic powder dosage 500 mg/L;JF high PAM dosage 0.3 mg/L,PAC dosage 40 mg/L,magnetic powder dosage 400 mg/L.The combined process of magnetic coagulation and microfiltration was used to treat mine water under the optimum technological conditions,the effluent quality is better than the expected limit to be adopted.