极低品位泥质难选氧化锌矿浮选试验研究

发布时间：2018-10-22 09:58

【摘要】：新疆某铅锌选矿厂尾矿主要为氧化锌矿,该氧化锌矿中Zn品位为1.26%、氧化率为76.38%;-15μm微细粒级含量为17.70%,矿石的含泥量较大;锌主要分布在+0.074 mm和-0.038 mm两个粒级;该氧化锌矿主要的可利用矿物为菱锌矿,脉石矿物主要为石英,属极低品位泥质难选氧化锌矿。该选矿厂现行的选矿工艺仅能有效回收矿石中的闪锌矿和方铅矿,而矿石中大量的氧化锌矿未能得到有效回收,造成资源浪费。为了有效回收矿石中的氧化锌矿,采用硫化-胺法浮选工艺和浮选柱设备开展了系统的半工业试验研究,试验内容包括脱泥与不脱泥对比试验、脱泥量试验、捕收剂选择试验、捕收剂用量试验、硫化钠用量试验、碳酸钠用量试验、水玻璃用量试验。结果表明:最佳试验条件为脱泥量10%、粗选药剂用量碳酸钠1000 g/t、水玻璃500 g/t、硫化钠6000 g/t、新型胺类捕收剂F210 30 g/t,采用两粗两精闭路浮选流程,得到的锌精矿中锌品位为28.64%、回收率为52.24%,实现了对该铅锌矿选矿厂尾矿中极低品位氧化锌矿的有效回收。
[Abstract]:The tailings of a certain lead-zinc concentrator in Xinjiang are mainly zinc oxide ores, in which Zn grade is 1.26 and oxidation rate is 76.38 ~ 15 渭 m. The content of fine particles is 17.70 and the content of mud is large, zinc is mainly distributed in 0.074 mm and-0.038 mm. The main available mineral of the zinc oxide ore is smithsonite, and the gangue mineral is mainly quartz, which belongs to the very low grade argillaceous refractory zinc oxide ore. The present processing technology of this concentrator can only effectively recover sphalerite and galena from ore, but a large number of zinc oxide ores in ore can not be recovered effectively, resulting in waste of resources. In order to recover zinc oxide ore from ore effectively, a systematic semi-industrial experiment was carried out by using sulfide-amine flotation process and flotation column equipment. The content of the experiments included the comparative test of desliming and non-desliming, the test of desliming amount, the test of collector selection. Collector dosage test, sodium sulfide dosage test, sodium carbonate dosage test, sodium silicate dosage test. The results show that the optimum test conditions are as follows: desliming 10%, crude reagent dosage 1000 g / t, sodium silicate 500g / t, sodium sulphide 6000 g / t, new amines collector F21030 g / t, using closed circuit flotation process with two coarse dichotoma. The zinc grade in the concentrate is 28.64 and the recovery rate is 52.24. The effective recovery of the low grade zinc oxide ore in the tailings of the lead-zinc concentrator has been realized.
【作者单位】：中国矿业大学化工学院;国家煤加工与洁净化工程技术研究中心;
【基金】：国家自然科学基金青年基金资助项目(51204178) 国家科技支撑计划课题-赤铁矿反浮选尾矿二次分选关键技术研究与工艺系统(2014BAB01B05) 江苏省自然科学基金青年基金项目(BK20150192)
【分类号】：TD952;TD923

【相似文献】