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为了降低全尾砂料浆的脱水浓缩成本、提高脱水浓缩效果,将磁处理技术引入到全尾砂料浆沉降中,并通过正交试验建立样本数据,运用GA-BP模型确定磁化全尾砂料浆的最佳磁化处理参数.试验研究显示:磁化全尾砂料浆沉降指标随着磁感应强度、磁化时间或料浆速度的增大均呈先增大后减小的趋势,并成非线性变化关系;适宜的磁化处理条件可以提高全尾砂料浆的沉降指标,全尾砂料浆最佳磁化絮凝沉降参数为磁感应强度0.192T、磁处理时间1.85min、料浆速度1.92m/s、PAC(聚合氯化铝)添加量28g/t,最大沉降速度约155cm/h,可节约PAC用量30.0%~42.5%.
In order to reduce the cost of dehydration and concentration of the tailings slurry and improve the effect of dehydration and concentration, the magnetic treatment technology was introduced into the whole tailing slurry settling, and the sample data was established by orthogonal test. The GA-BP model was used to determine the total tailings The optimum magnetization parameters of the slurry.The experimental study shows that the sedimentation index of the magnetized total tailing slurry increases first and then decreases with the increase of the magnetic flux density, the magnetization time or the slurry velocity, and becomes non-linear The optimum magnetization conditions can improve the settling index of the whole tailings slurry. The optimum magnetization flocculation and sedimentation parameters of the tailings slurry are magnetic induction intensity 0.192T, magnetic treatment time 1.85min, slurry velocity 1.92m / s, PAC (polyaluminum chloride) added 28g / t, the maximum sedimentation rate of about 155cm / h, PAC can save the amount of 30.0% ~ 42.5%.