三氯化铁对细粒铁尾矿絮凝沉降的影响研究

Study on the Effect of Ferric Chloride on Flocculation and Settlementation of Fine Iron Tailings

基于细粒尾矿的粒度组成及化学成分分析,探索了三氯化铁絮凝剂的药剂用量、矿浆pH、分散时间和矿浆温度对细粒尾矿絮凝沉降效果的影响。研究结果表明:当絮凝剂用量为30 mg/L、矿浆pH为9、分散时间为2 min、矿浆温度为60℃时,澄清层高度为159.7 mm,沉降速度为15.97 mm/min,浊度为16.25 NTU,细粒尾矿沉降效果最好。建立了细粒尾矿沉降速度模型,模型的相关系数R^(2)=0.9568,该模型拟合结果较好,具有较高的精度,对细粒尾矿沉降过程的研究具有一定的指导意义。

Based on the analysis of particle size composition and chemical composition of fine tailings, the influences of dosage of ferric chloride flocculant, slurry pH, dispersion time and slurry temperature on the flocculation and sedimentation effect of fine tailings were explored. The research results show that when the flocculant dosage is 30 mg/L, the slurry pH is 9, the dispersion time is 2 min, and the slurry temperature is 60℃, the clarification layer height is 159.7 mm, the settling velocity is 15.97 mm/min, and the turbidity is 16.25 NTU, acheiving the best settling effect of fine tailings. By establishing the settling velocity model of fine tailings, the correlation coefficient R^(2) of the model reaches 0.9568.The fitting result of the model is good with high precision, which has a certain guiding significance for the settlement process of fine tailings.