Synthesis and Flotation Experimental Study of DX−2 Activator for a Refractory Oxidized Copper Mine
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摘要:
氧化铜矿是我国重要的铜矿资源，近年来易选铜矿资源逐年减少，因而，氧化铜矿的高效选别对铜资源的回收有着重要意义。由于现存氧化铜矿大多嵌布粒度细、含泥量大，难以与脉石矿物分离，使用常规活化剂处理难以达到理想的选矿指标。以2，5−二硫酚−1，3，4−硫代二唑为基础，通过一锅法合成了新型高效氧化铜矿活化剂DX−2。浮选实验结果表明：针对含铜1.23%、氧化率为90.24%的难选氧化铜矿，采用DX−2为活化剂、硫化钠为硫化剂，在pH=8的条件下，以戊基黄药、烷基羟肟酸钠为捕收剂，松油醇为起泡剂，得到了铜品位为18.37%、回收率为82.59%的铜精矿，为难处理氧化铜矿的高效浮选提供了新的技术途径。
Abstract:Copper oxide ore is an important copper resource in China. In recent years, the easily treatable copper minerals have been decreasing annually. Therefore, the efficient enrichment of copper oxide ore is of great significance for copper resources. Due to the fine particle size and high mud content of existing copper oxide ores, it is difficult to separate from gangue minerals. Thus, it is unable to achieve beneficiation indicators using conventional activators for treatment. Based on 2,5−dithiophenol−1,3,4−thiodiazole, a new high−efficiency copper oxide mineral activator, DX−2, was synthesized through a one-pot method. Flotation test results showed that, for the refractory oxidized copper ore with a copper content of 1.23% and an oxidation rate of 90.24%, utilizing DX−2 as the activator, sodium sulfide as the sulfurizer, amyl xanthate and sodium alkyl hydroxamate as collectors, at pH 8, with terpineol as a frother, yielded a copper concentrate with a grade of 18.37% and a recovery rate of 82.59%. These experimental researches introduce a new technical approach for the efficient flotation of refractory copper oxide ores.
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Key words:
- copper oxide /
- flotation /
- activator DX−2 /
- reagent synthesis
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表 1 矿石主要化学成分分析结果
Table 1. Chemical analysis results of the oxidized copper ore
/% 成分 Cu S As Fe Zn Ag Au Cd 含量 1.23 0.12 <0.1 1.35 0.076 18.5 0.31 0.053 成分 CaO MgO Al2O3 SiO2 Cr Ge F Cl 含量 10.36 4.21 3.49 38.67 0.0069 <0.005 0.03 0.094 注：Au、Ag含量单位为g/t。 
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表 2 铜物相分析结果
Table 2. Analysis results of copper phase
矿物相态 铜品位/% 分布率/% 硫化铜 0.12 9.76 游离氧化铜 0.93 75.61 结合氧化铜 0.18 14.63 全铜 1.23 100.00
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表 3 开路实验结果
Table 3. Results of open circuit test
产品名称 产率/% 铜品位/% 铜回收率/% 铜精矿 4.75 17.92 68.04 中1 1.67 3.52 4.70 中2 1.96 2.49 3.90 中3 2.93 1.97 4.62 中4 3.06 1.46 3.58 中5 1.93 0.92 1.42 尾矿 83.71 0.21 13.75 合计 100.00 1.25 100.00
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表 4 闭路实验结果
Table 4. Results of closed-circuit test
活化剂
种类原矿铜
品位/%精矿
产率/%精矿铜
品位/%精矿
回收率/%尾矿铜
品位/%DX-2 1.23 5.53 18.37 82.59 0.27 DMTD 1.28 5.61 17.95 78.67 0.29 差值 −0.05 −0.08 0.42 3.92 −0.02
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