Experimental Research on Recovery of Fluorite from a Polymetallic Mine Tailing in Inner Mongolia
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摘要:
内蒙古某多金属矿浮选尾矿中含有萤石资源，由于受前期钨锡浮选药剂和矿石嵌布特性的影响，萤石浮选精矿品位最高为92%，回收率30%左右，尾矿中萤石资源未能有效回收。本研究通过预先磁选抛废提高萤石入选品位，采用有机抑制剂HG-1代替酸化水玻璃，在原料CaF2品位17.65%的条件下，获得CaF2品位97.26%，回收率63.15%的高品质萤石精矿，实现了该尾矿中萤石资源的综合回收。
Abstract:Flotation tailings of a polymetallic mine in Inner Mongolia contain fluorite resources. Due to the influence of the tungsten-tin flotation reagent and the ore embedded characteristics in the early stage, the fluorite flotation concentrate grade is up to 92%, and the recovery is about 30%. The fluorite resources in the tailings were not effectively recovered. In this study, the beneficiation feed grade of fluorite was improved by waste disposal with pre-magnetic separation, and organic depressor HG-1 was used instead of acidified water glass. Under the condition of original ore CaF2 grade of 17.65%, the fluorite concentrate with CaF2 grade of 97.26% and recovery of 63.15% was obtained, which realized the comprehensive recovery of fluorite resources in tailings.
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表 1 矿样多元素分析结果/%
Table 1. Results of multi-element analysis of fluorite
CaF2 Cu Pb Zn As Sn Fe Al2O3 SiO2 WO3 CaO Bi MgO K2O 17.85 0.005 0.029 0.033 0.18 0.20 8.16 7.58 39.34 0.028 16.47 0.022 2.84 2.45 
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表 2 矿样磁性分析结果
Table 2. Results of magnetic analysis of fluorite
磁选产物 产率/% CaF2品位/% 分布率/% 累计品位/% 累计分布率/% 矿物种类 0~340 10.73 16.75 10.16 17.69 100.00 含磁铁矿萤石、钙铁榴石、角闪石、绿泥石 340~550 20.50 4.09 4.74 17.80 89.84 钙铁榴石、黑云母、绿帘石、角闪石 550~760 20.15 8.33 9.49 21.89 85.10 钙铝榴石、绿帘石、透辉石、符山石 760~970 9.93 8.12 4.56 27.52 75.61 符山石、钙铝榴石、白云母 970~1330 5.81 18.36 6.03 32.50 71.05 符山石、白云母 非磁产品 32.86 35.00 65.01 35.00 65.01 萤石、方解石、石英、长石 合计 100.00 17.69 100.00 - - -
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表 3 全流程实验结果
Table 3. Results of whole test
产品名称 产率/% CaF2品位/% CaF2回收率/% 磁性产品 47.84 7.18 19.46 粗选尾矿 32.99 3.31 6.19 精选尾矿 7.71 25.64 11.20 萤石精矿 11.46 97.26 63.15 给矿 100.00 17.65 100.00
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