Application of Novel Collector Dosage RA-92 in the Flotation Procedure of Low-grade Carbonate Manganese Ore
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摘要: 微细粒低品位锰矿由于颗粒间的非选择性聚集、浮选药剂用量大、浮选效率低等技术难题而致使其利用困难,造成大量浪费。在品位低于13%的锰矿浮选技术研究中,捕收剂最受关注,前人已研究了多种类型的捕收剂,所得精矿品位在16.9%~18.3%之间,回收率为56%~97%,回收率比较理想,但精矿品位总体不高。本文将新型捕收剂RA-92应用于湖南凤凰-花垣地区低品位碳酸锰矿(锰品位为10.7%)的选矿工艺中,实验研究了磨矿细度、pH值、抑制剂和捕收剂用量对浮选效果的影响,在最佳工艺条件下,精矿品位由原矿的10.7%提升至17.4%,回收率达到80.2%。研究表明RA-92对碳酸锰矿具有良好的捕收性能,浮选工艺相对简单且捕收剂用量少,浮选成本较低,可为此种捕获剂在微细粒低品位碳酸盐锰矿选矿中的应用得到推广。Abstract: Fine-grained low-grade manganese ore is difficult to extract due to some mineral processing technology problems, such as non-selective aggregation between ore particles, large dosage of flotation reagents, and low efficiency of flotation. In recent years, multiple types of collectors have been used for the flotation of low grade manganese ore (less than 13%), while the concentrate grade was between 16.9% and 18.3%, and the recovery between 56% and 97%. Although the recovery is ideal, the concentrate grade is too low. RA-92 was selected as a new collector in the flotation of low grade manganese carbonate (grade of 10.7%) ores from Fenghuang-Huayuan area in Hunan in this study. The effects of the grinding fineness, pH, inhibitors, and the collecting agent dosage were investigated and the optimum conditions were obtained. The concentrate grade ranges from 10.7% of the original ores to 17.4% in concentrate, and recovery reached 80.2%. This indicates that the new collector has better selectivity and a stronger ability for collecting manganese carbonate. The collector RA-92 is a good prospect in low grade manganese carbonate due to the relatively simple flotation process, less dosage of collector and lower flotation costs.
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Key words:
- novel collector agent /
- low-grade carbonate manganese ore /
- flotation /
- recovery
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表 1 一粗一精一扫工艺数据
Table 1. Data of the floatation test of single-stage roughing,single-stage cleaning and single-stage scavenging
产品名称 质量(g) 锰品位(%) 产率(%) 回收率(%) 精矿 91.92 19.7 40.8 70.5 中矿1 51.79 8.1 23.0 16.3 中矿2 10.76 7.8 4.8 3.3 尾矿 70.53 3.6 31.4 10.0 原矿 225.00 11.4 100.0 100.0 
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表 2 浮选闭路药剂制度
Table 2. Reagent system of the closed flotation
实验序号 分选矿 六偏磷酸钠(kg/t) RA-92(kg/t) 水玻璃(kg/t) 2号油(g/t) 1 粗选 0.22 2.22 3.56 57.12 扫选 - 0.88 1.78 57.12 精选 - - 2.67 - 2 粗选 0.11 2.22 2.67 37.98 扫选 - 0.88 0.89 19.04 精选 - - 1.78 - 3、4、5 粗选 0.11 2.22 2.67 37.98 扫选 - 0.88 0.89 19.04 精选 - - 1.78 - 注：“-”表示不加该种药剂。
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表 3 闭路试验结果
Table 3. Analytical result of the flotation test of closed-circuit
产品名称 平均质量(g) 平均品位(%) 平均产率(%) 平均回收率(%) 精矿 89.85 17.4 49.6 80.2 尾矿 91.45 4.2 50.4 19.8 原矿 180.06 10.7 100.0 100.0
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