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郴州矿冶厂加工来自各地的民窿锰矿石,生产锰粉。矿石含泥量大(10-15%),湿式破碎又产生部分次生矿泥。选矿过程中的尾矿水排至郴江,造成环境污染和锰矿细泥流失。为解决上述两个问题,笔者于1985年开展试验,采用絮凝-浓缩-过滤-沉淀流程以及倾斜浓密箱和倾斜过滤箱等设备,处理郴州矿冶厂的尾矿水,使尾矿水达到排放标准,并可返回生产流程。(一)尾矿水及锰矿细泥该厂每小时排出约60—88米~3尾矿水。其中跳汰机尾矿水34—50米~3,流失19—28米~3,称为1号尾矿水;摇床尾矿和水力分级箱溢流7-10米~3/时,含矿泥较多,是尾矿处理的主要对象,称为2号尾矿水。尾矿水质分析见表1。尾矿粒度细,-37微米占89.46%,锰矿占87.34%,沉降速度10-15毫米/分钟,而0.1—0.001微米则需6—12小时才能基本沉清。锰矿细泥存在于尾矿水中,粒度较细(-37微米),金属占有率为原矿的10.18%,以悬浮物存在。
Chenzhou Mining and Metallurgical processing from various parts of the manganese ore mine, the production of manganese. Ore contains a large amount of mud (10-15%), wet crushing produces some secondary sludge. Dressing process of tailings water discharged to Chenjiang, resulting in environmental pollution and manganese ore fine mud loss. In order to solve the above two problems, the author carried out experiments in 1985 and adopted the equipment of flocculation-concentration-filtration-sedimentation process and inclined thick tank and inclined filter tank to treat the tailings water of Chenzhou Mining and Metallurgical Plant to discharge the tailings water Standard, and return to the production process. (A) tailings water and manganese ore fine mud The factory discharges about 60-88 m ~ 3 tailings water per hour. One jig tailings 34-50 meters ~ 3, the loss of 19-28 meters ~ 3, known as No. 1 tailings water; shaker tailings and hydraulic grading box overflow 7-10 meters ~ 3 / hour, containing ore Mud more, is the main target of tailings treatment, known as No. 2 tailings water. Tailings water quality analysis in Table 1. Tailings of fine grain size, accounting for 89.46% of -37 microns, 87.34% of manganese ore, the settling rate of 10-15 mm / min, and 0.1-0.001 microns will take 6-12 hours to basic clear. Manganese fine slime present in the tailings water, the smaller size (-37 microns), the metal share of 10.18% of the ore to the existence of suspended solids.