The effect of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and steel balls
The effect of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and steel balls
摘要
The role of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and low alloy steel balls were investigated in the grinding of Sarcheshmeh porphyry copper sulfide ore. All these factors strongly affect the galvanic current between the minerals and the steel during the grinding process. The galvanic current density decreased as the solution pH and percent solids increased. In addition, changing the water in the ball mill from tap to distilled water reduced the galvanic current between the minerals and the balls. Potentiodynamic polarization curves showed that pyrite and chalcopyrite demonstrated typical active-passive-transpassive anodic behavior in the grinding of copper ore. However, the nature of their transitions from the active to the passive state differed. This behavior was not seen in the grinding of pure minerals. In addition, an EDTA extraction technique was employed to quantify the amount of oxidized iron in the mill discharge. The amount of extractable iron was influenced by the same experimental factors and in the same way as the galvanic current.
The role of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and low alloy steel balls were investigated in the grinding of Sarcheshmeh porphyry copper sulfide ore. All these factors strongly affect the galvanic current between the minerals and the steel during the grinding process. The galvanic current density decreased as the solution pH and percent solids increased. In addition, changing the water in the ball mill from tap to distilled water reduced the galvanic current between the minerals and the balls. Potentiodynamic polarization curves showed that pyrite and chalcopyrite demonstrated typical active-passive-transpassive anodic behavior in the grinding of copper ore. However, the nature of their transitions from the active to the passive state differed. This behavior was not seen in the grinding of pure minerals. In addition, an EDTA extraction technique was employed to quantify the amount of oxidized iron in the mill discharge. The amount of extractable iron was influenced by the same experimental factors and in the same way as the galvanic current.
二级参考文献22
-
1Shelp G S,Chesworth W,Spiers G.The amelioration of acid mine drainage by an in situ electrochemical method-Ⅰ.Employing scrap iron as the sacrificial anode[J].Applied Geochemistry,1995,10:705-713.
-
2Holmes P R,Crundwell F K.Kinetic aspects of galvanic interactions between minerals during dissolution[J].Hydrometallugy,1995,39:353-375.
-
3Pecina-Trevio E T,Uribe-Salas A,Nava-Alonso F.Effect of dissolved oxygen and galvanic contact on the floatability of galena and pyrite with Aerophine 3418A[J].Minerals Engineering,2003,16:359-367.
-
4肖纪美,曹楚南.材料腐蚀原理[M].北京:化学工业出版社,2002:72-85.
-
5Mckibben M A,Barnes H L.Oxidation of pyrite in low temperature acidic solutions:rate laws and surface textures[J].Geochimica et Cosmochimica Acta,1986,50:1 509-1 520.
-
6Lasaga A C,Blum A E.Surface chemistry,etch pits and mineral-water reactions[J].Geochimica et Cosmochimica Acta,1986,50:2 363-2 379.
-
7Lin Z.Mineralogical and chemical characterization of wastes from the sulfuric acid industry in Falun,Sweden[J].Environmental Geology,1997,30(3/4):152-162.
-
8Holmes P R,Crundwell F K.The kinetics of the oxidation of pyrite by ferric ions and dissolved oxygen:an electrochemical study[J].Geochimica et Cosmochimica Acta,2000,64:263-274.
-
9da Silva G,Lastra M R,Budden J R.Electrochemical passivation of sphalerite during bacterial oxidation in the presence of galena[J].Minerals Engineering,2003,16:199-203.
-
10Madhuchhanda M,Devi N B,Rao K S,et al.Galvanic interaction between sulfide minerals and pyrolusite[J].Journal of Solid State Electrochemistry,2000,5:466-472.
共引文献3
-
1周丽,李和平,刘庆友.硫化物矿物原电池反应的实验研究进展[J].矿物岩石地球化学通报,2007,26(z1):531-532. 被引量:2
-
2王纪镇,刘睿华,荆茂晨,韩硕.方解石与共伴生矿物浮选交互影响研究进展[J].有色金属工程,2023,13(4):78-87.
-
3苏超,申培伦,李佳磊,蔡锦鹏,刘思言,曹阳,刘殿文.黄铁矿浮选的抑制与解抑活化研究进展[J].化工进展,2019,38(4):1921-1929. 被引量:14
-
1陈琳,杨凤怀.重质碳酸钙超细磨的研究[J].非金属矿,2009,32(1):16-17. 被引量:1
-
2李楠,沈浩.两种操作方法对氩系统的影响[J].通用机械,2010(11):54-56.
-
3乔永涛.煤矿瓦斯抽放技术应用探析[J].中国科技博览,2012(26):419-419.
-
4Luo, Lin, Qiu, Guanzhou, Hu, Yuehua, Wang, Dianzuo, He, Boquan.FLOTATION CLASSIFICATION APPROACH BY CONTROLLING INTERACTIONS BETWEEN PARTICLES[J].中国有色金属学会会刊:英文版,1995,5(4):58-63.
-
5雷军.提高硫化铜矿石金回收率之研讨[J].国外黄金参考,1999(7):15-19.
-
6曹兴,周辰泰,陈国强,姜寄,刘丽.铜尾矿半工业浓密试验[J].湖南有色金属,2016,32(2):25-28. 被引量:2
-
7杨涛,邢会恩.矿井瓦斯抽采技术发展研究[J].内蒙古煤炭经济,2013(11):29-29. 被引量:2
-
8梁顺伦.关于瓦斯抽取技术的探讨[J].魅力中国,2010,0(1X):247-247.
-
9张英杰,巩冠群.细精煤压滤脱水影响因素研究[J].中国煤炭,2013,39(2):74-76. 被引量:4
-
10科特.,DG.复杂硫化物矿石中含银矿物的浮选[J].地质科技动态,1996(8):44-45.