Flotation Performance of Bastnaesite with a Halogenated Lauric Acid Collector WN−01
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摘要:
为解决氟碳铈矿浮选所用羟肟酸类捕收剂价格高、用量大、毒性强、难降解且起泡性较弱等问题，研发了一种新型卤代改性月桂酸捕收剂WN−01用于氟碳铈矿浮选提纯。实验结果表明，相比改性前的月桂酸，月桂酸卤代改性捕收剂WN−01取得的最佳粗精矿REO品位和回收率可分别提高4.45百分点和36.86百分点。改性脂肪酸捕收剂WN−01浮选氟碳铈矿的适宜条件为矿浆pH为8.5，矿浆温度为30 ℃，捕收剂用量为150 mg/L，抑制剂水玻璃用量为120 mg/L。在该条件下，REO品位为26.57%的氟碳铈矿经1次粗选3次精选2次扫选开路浮选，可得到REO品位为49.18%、回收率为80.72%的浮选精矿。产品鉴定结果表明，浮选精矿主要成分为氟碳铈矿，含极少量萤石，浮选尾矿主要是石英和硅灰石，改性脂肪酸捕收剂WN−01表现出了优异的捕收性能和选择性，可替代羟肟酸类捕收剂，实现氟碳铈矿绿色、高效浮选。
Abstract:In order to solve the problems of high cost, requiring large usage, toxicity, difficult to degrade and weak foaming ability for the hydroxamic acid collectors used in bastnaesite flotation, a new type of halogenated lauric acid collector WN−01 was developed and used as the collector for the flotation of the bastnaesite. The experimental results showed that compared to the pure lauric acid as the collector for bastnaesite flotation, the REO grade and recovery of concentrate obtained by the halogenated lauric acid collector WN−01 increased 4.45 percentage points and 36.86 percentage points, respectively. The suitable conditions for the bastnaesite flotation with collector WN−01 were a slurry pH of around 8.5, a pulp temperature of 30 ℃, a collector WN−01 dosage of 150 mg/L and a depressant water glass dosage of 120 mg/L. Under these conditions, an open circuit flotation process of 1 time roughing, 3 times concentrating, 2 times scavenging was used to treat the bastnaesite ore with a REO grade of 26.57%, the flotation concentrate of REO grade of 49.18% and REO recovery of 80.72% was obtained. The testing and analysis results of flotation product indicated that the flotation concentrate was mainly bastnaesite with minute quantity of fluorite. The flotation tailings were almost quartz and wollastonite. The above results revealed that the modified fatty acid collector WN−01 had excellent collecting ability and selectivity, which could replace the hydroxamic acid collectors in bastnaesite flotation to achieve green and efficient flotation processes.
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Key words:
- modified fatty acids /
- collector /
- bastnaesite /
- flotation
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表 1 开路试验结果
Table 1. Results of open−circuit flotation
产品名称 产率% REO品位% 回收率% 精矿 44.12 49.18 80.72 中矿1 12.73 6.63 3.14 中矿2 6.58 18.39 4.5 中矿3 9.22 7.93 2.72 中矿4 10.08 4.06 1.52 中矿5 5.46 31.79 6.45 尾矿 11.81 2.17 0.95 原矿 100.00 26.88 100.00 
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