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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第31卷    第5期    总第266期    2021年5月

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文章编号:1004-0609(2021)-05-1369-08
邻丁基S-(1-氯乙基)二硫代碳酸酯捕收剂在黄铜矿和黄铁矿浮选分离中的作用及机理
迟晓鹏1, 2, 3,郭芸杉1, 2,衷水平1, 2, 3,钟 文1, 2,吕旭龙4

(1. 福州大学 紫金矿业学院,福州 350108;
2. 福州大学 紫金矿业集团矿产资源综合利用联合研发中心,福州 350108;
3. 紫金矿业集团股份有限公司 低品位难处理黄金资源综合利用国家重点实验室,上杭364200;
4. 厦门紫金矿冶技术有限公司,厦门 361000
)

摘 要: 以丁基黄原酸钠、二氯乙烷为原料, 合成了新型黄铜矿捕收剂邻丁基S-(1-氯乙基)二硫代碳酸酯(GC-Ⅰ)。气相色谱和红外光谱分析表明,该药剂是一种脂类捕收剂,其纯度达到了90.88%。通过纯矿物浮选试验对比了新药剂GC-Ⅰ与常用硫化矿捕收剂对黄铜矿、黄铁矿的捕收效果。结果表明,在矿浆pH值为7、用量160 mg/L的浮选条件下,GC-Ⅰ能直接浮选出 96.5%的黄铜矿,相同条件下黄铁矿的回收率仅为12%,体现新药剂GC-Ⅰ对黄铜矿的高选择性。利用GC-Ⅰ和丁基黄药对多宝山铜矿实际矿石进行浮选对比试验。结果表明,相同条件下,两种药剂对铜的回收率相近,但使用GC-Ⅰ作为捕收剂使精矿中铜品位提高17.14%。FT-IR 光谱分析表明,GC-Ⅰ在黄铜矿表面发生化学吸附,在黄铁矿表面为物理吸附,能够较好地实现铜硫分离。吸附量测试结果表明,当pH值为7时,GC-Ⅰ在黄铜矿表面的吸附量达到最大值,而在黄铁矿表面吸附较少,吸附量变化趋势和纯矿物浮选试验结果一致。

 

关键字: 新型捕收剂;黄铜矿;浮选分离;黄铁矿

Effect and mechanism of o-butyl S-(1-chloroethyl) carbonodithioate collector in flotation separation of chalcopyrite and pyrite
CHI Xiao-peng1, 2, 3, GUO Yun-shan1, 2, ZHONG Shui-ping1, 2, 3, ZHONG Wen1, 2, Lü Xu-long4

1. Zijin Mining College, Fuzhou University, Fuzhou 350108, China;
2. Zijin Mining Group Joint Research Center for Comprehensive Utilization of Mineral Resources, Fuzhou University, Fuzhou 350108, China;
3. State Key Laboratory for Comprehensive Utilization of Low-grade Refractory Gold Resources, Zijin Mining Group Co., Ltd., Shanghang 364200, China;
4. Xiamen Zijin Mining and Metallurgy Technology Co., Ltd., Xiamen 361000, China

Abstract:Using butyl sodium xanthate and dichloroethane as raw materials, a new chalcopyrite collector o-butyl S-(1-chloroethyl) dithiocarbonate (GC-Ⅰ) was synthesized. Gas chromatography and infrared spectroscopy analysis show that the agent is a lipid collector with a purity of 90.88%. The pure mineral flotation test compares the collection effect of the new agent GC-Ⅰ and the commonly used sulfide ore collectors on chalcopyrite and pyrite. The results show that, under the flotation conditions at the slurry pH of 7 and the slurry dosage of 160 mg/L, GC-Ⅰ can directly float 96.5% of chalcopyrite, and the recovery rate of pyrite is only 12%, which reflects the high selectivity of the new agent GC-Ⅰ to chalcopyrite. The flotation comparison test of the actual ore of Duobaoshan Copper Mine using GC-Ⅰ and butyl xanthate show that, under the same conditions, the recovery rates of the two agents for copper are similar. Using GC-Ⅰ as the collector, the grade of ore copper increases by 17.14%. FT-IR spectroscopy analysis show that GC-Ⅰ is chemically adsorbed on the surface of chalcopyrite and physically adsorbed on the surface of pyrite, which can achieve better separation of copper and sulfur. The adsorption capacity test results show that, when the pH value is 7, the adsorption capacity of GC-Ⅰ on the surface of chalcopyrite reaches the maximum value, and the adsorption capacity on the surface of pyrite is less. The change trend of adsorption capacity is consistent with the pure mineral flotation test.

 

Key words: new collector; chalcopyrite; flotation separation; pyrite

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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