湖北某原生矿铜、铁、钴、金、银多金属回收选矿工艺试验研究
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摘要
本论文对湖北某原生矿进行了详细研究,查明了该矿石的主要矿物组成及矿物含量、矿石嵌布特征及共生关系。根据该矿石性质制定了铜硫混浮,铜硫分离,粗选尾矿磁选的分选流程。按照此流程进行粗选条件试验,粗选条件试验包括磨矿细度试验,捕收剂种类及用量试验、2#油用量试验。并进行了调整剂种类及用量试验、捕收剂混合用药试验、铜硫混浮粗精再磨和铜硫混浮粗精精选后精矿再磨试验,确定了合理用药制度和分选流程。依据前面确定最佳试验条件,进行开路试验和闭路全流程试验,对闭路全流程进行数质量计算,并对最终精矿产品进行了分析。
试验结果表明:采用阶段磨矿流程不能大幅度提高铜精矿铜回收率及伴生金、银回收率,且与常规磨矿流程相比,阶段磨矿流程较复杂,成本较高,故不宜采用。
采用常规磨矿流程,在原矿磨矿细度-75μm占85%试验条件下,可以获得较好试验指标。该原生矿采用两次铜硫混合粗选,两次粗精精选,混精浓缩脱药,铜硫分离粗选,两次铜精选,两次硫扫选;铜硫混浮粗选尾矿经两段磁选选铁。由原生矿获得铜精矿含铜16.80%,含金6.40克/吨,含银18.83克/吨,铜、金回收率分别为91.11%、74.57%、76.58%;获得硫钴精矿含硫38.69%,含钴0.267%,硫、钴回收率分别为60.70%及52.44%;获得铁精矿含铁67.48%,含硫0.294%,铁回收率为88.84%。
In this thesis, a primary ore in Hubei was studied in detail, the major mineral composition and mineral content of the ore, the embedment characteristics and symbiotic relations between ores were identified. According to the nature of this ore, a flowsheet includes Cu-S bulk flotation, Cu-S separation is introduced. On the basis of the flowsheet designed, the roughing condition tests were carried out, which includes grinding fineness test, the variety and amount of different collectors test as well as the amount of 2#oil test, at the same time, the variety and amount of different regulators tests, mixed collectors tests, rough concentrate of Cu-S bulk flotation regrinding and twice cleaning concentrate of Cu-S bulk flotation regrinding tests were carried out too, all of those were studied in order to find out the a proper ore separation flow and appropriate pharmaceutical systems, at the same time, not only the quantity and quality of closed circuit calculations are researched in this thesis, But the analysis of final concentrate.
The test results show that in the stage grinding flowsheet, the Cu recovery of Cu concentrate can’t be raised significantly, at the same time, it is more complicated and have a high cost, so it is not proper to be adopted.
On the conditions of the grinding fineness of -75μm is 85%, by adopting the regular grinding flowsheet of twice Cu-S mixed roughing, twice cleaning separation of roughing Cu-S concentrate, dewatering and removing reagents residue of roughing concentrate, Cu-S separation roughing, twice Cu cleaning, twice S scavenging, twice low-intensity magnetic separation of floatation tailings, a better test result is got. with the Cu concentrate with Cu grade of 16.80%, Au grade of 6.40g/t, Ag grade of 18.83 g/t, the respective recovery of Cu、Au、Ag is 91.11%、74.57%、76.58%; A cobalt sulfide concentrate with the sulfur grade of 38.69%and cobalt grade of 0.267%, the respective recovery of sulfur and cobalt is 67.48% and 52.44%; the iron concentrate with iron grade of 67.48% and sulfur grade of 0.294%, the recovery of iron is 88.84%.
试验结果表明:采用阶段磨矿流程不能大幅度提高铜精矿铜回收率及伴生金、银回收率,且与常规磨矿流程相比,阶段磨矿流程较复杂,成本较高,故不宜采用。
采用常规磨矿流程,在原矿磨矿细度-75μm占85%试验条件下,可以获得较好试验指标。该原生矿采用两次铜硫混合粗选,两次粗精精选,混精浓缩脱药,铜硫分离粗选,两次铜精选,两次硫扫选;铜硫混浮粗选尾矿经两段磁选选铁。由原生矿获得铜精矿含铜16.80%,含金6.40克/吨,含银18.83克/吨,铜、金回收率分别为91.11%、74.57%、76.58%;获得硫钴精矿含硫38.69%,含钴0.267%,硫、钴回收率分别为60.70%及52.44%;获得铁精矿含铁67.48%,含硫0.294%,铁回收率为88.84%。
In this thesis, a primary ore in Hubei was studied in detail, the major mineral composition and mineral content of the ore, the embedment characteristics and symbiotic relations between ores were identified. According to the nature of this ore, a flowsheet includes Cu-S bulk flotation, Cu-S separation is introduced. On the basis of the flowsheet designed, the roughing condition tests were carried out, which includes grinding fineness test, the variety and amount of different collectors test as well as the amount of 2#oil test, at the same time, the variety and amount of different regulators tests, mixed collectors tests, rough concentrate of Cu-S bulk flotation regrinding and twice cleaning concentrate of Cu-S bulk flotation regrinding tests were carried out too, all of those were studied in order to find out the a proper ore separation flow and appropriate pharmaceutical systems, at the same time, not only the quantity and quality of closed circuit calculations are researched in this thesis, But the analysis of final concentrate.
The test results show that in the stage grinding flowsheet, the Cu recovery of Cu concentrate can’t be raised significantly, at the same time, it is more complicated and have a high cost, so it is not proper to be adopted.
On the conditions of the grinding fineness of -75μm is 85%, by adopting the regular grinding flowsheet of twice Cu-S mixed roughing, twice cleaning separation of roughing Cu-S concentrate, dewatering and removing reagents residue of roughing concentrate, Cu-S separation roughing, twice Cu cleaning, twice S scavenging, twice low-intensity magnetic separation of floatation tailings, a better test result is got. with the Cu concentrate with Cu grade of 16.80%, Au grade of 6.40g/t, Ag grade of 18.83 g/t, the respective recovery of Cu、Au、Ag is 91.11%、74.57%、76.58%; A cobalt sulfide concentrate with the sulfur grade of 38.69%and cobalt grade of 0.267%, the respective recovery of sulfur and cobalt is 67.48% and 52.44%; the iron concentrate with iron grade of 67.48% and sulfur grade of 0.294%, the recovery of iron is 88.84%.
引文
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