Abstract：Activated carbon is a good adsorbent for gold and it has been widely used in cyanide leaching process. Therefore, it is very important to evaluate the gold adsorption performance of activated carbon. The cyanide leaching process was referred to simulate the adsorption of gold in cyanide solution by activated carbon. The determination method of gold adsorption capacity of activated carbon was established based on the Freundlich adsorption isotherm equation. A series of factors influencing on the determination of gold adsorption capacity were investigated to optimize and obtain the measurement conditions: the adsorption oscillation time was 16h; the volume of adsorption solution was 150mL; the grain size of activated carbon was less than 0.074mm; the rotating speed of oscillator was 200r/min; the pH of adsorption solution was 11.5; the oscillation temperature was (30±1)℃; the mass concentration of sodium cyanide in adsorption solution was 0.2g/L. The gold adsorption capacities of two actual activated carbon samples were determined according to the experimental method. The relative standard deviation (RSD, n=11) was 4.2% and 4.8%, respectively. The gold adsorption capacities of different activated carbons were compared with their iodine numbers, and the results indicated that the proposed method was comparable.
胡春融,杨凤,杨廻春.黄金选冶技术现状及发展趋势[J].黄金,2006,27(7):29-36.HU Chun-rong,YANG Feng,YANG Hui-chun.Current status and developing tendency of gold extraction[J].Gold,2006,27(7):29-36.
[2]
孙亦飞.现代黄金冶炼技术[M].北京:冶金工业出版社,2014:37-39.
[3]
张文阁,杨小霞.氰化物溶液中活性炭吸附金的研究[J].有色金属,1983,35(3):52-58.ZHANG Wen-ge,YANG Xiao-xia.On the characteristics of adsorption of gold from cyanide solution with activated carbon[J].Nonferrous Metals,1983,35(3):52-58.
[4]
伍喜庆,黄志华.改性活性炭吸附金的性能[J].中国有色金属学报,2005,15(1):129-132.WU Xi-qing,HUANG Zhi-hua.Adsorption of gold onmodified activated carbon[J].The Chinese Journal of Nonferrous Metals,2005,15(1):129-132.
[5]
张全祯.提金用活性炭性能测定及选优[J].黄金,1991,12(12):39-42.ZHANG Quan-zhen.The identification of the performance of activated carbon for use in gold extraction and the optimum seeking of activated carbon[J].Gold,1991,12(12):39-42.
[6]
李桂芹.提金用活性炭的性能测试与质量标准的探讨[J].中国矿业,1997,6(6):63-65.LI Gui-qin.On measuring the performance and quality standard of activated carbon[J].China Mining Magazine,1997,6(6):63-65.
Mcdougall G J,Hancock R D,Nicol M J,et al.The mechanism of adsorption of gold cyanide on activated carbon[J].Journal-South African Institute of Mining and Metallurgy,1980(80):344-356.
[10]
米列图科夫M A,朱长亮,杨兴英,等.活性炭吸附金氰络合物机理(待续)[J].黄金,2005,26(9):57.Meretukov M A,ZHU Chang-liang,YANG Xing-ying,et al.The mechanism of adsorption of gold cyanide complex on activated carbon (to be continued)[J].Gold,2005,26(9):57.
[11]
Jia Y F,Steele C J,Hayward I P,et al.Mechanism of adsorption of gold and silver species on activated carbons[J].Carbon,1998,36(9):1299-1308.
[12]
张锦瑞.活性炭的特性及其吸附金的机理[J].有色矿山,1994(5):39-40.ZHANG Jin-rui.Characteristics of activated carbon and its mechanism of gold adsorption[J].Nonferrous Mines,1994(5):39-40.
[13]
孙兴家.活性炭吸附金的机理、应用及工艺管理[J].黄金科学技术,1994,2(5):34-38.SUN Xing-jia.Mechanism,application and process management of activated carbon gold adsorption[J].Gold Science and technology,1994,2(5):34-38.
[14]
Lagerge S,Zajac J,Partyka S,et al.A Two-stage adsorption of cyanide gold complexes onto activated carbon inferred from various experimental studies[J].Langmuir,1997,13:4683-4692.
[15]
杨中山,刘庭耀,王宝,等.活性炭吸附提取氰化亚金离子的数学模拟[J].过程工程学报,2015,15(4):594-598.YANG Zhong-shan,LIU Ting-yao,WANG Bao,et al.Mathematical simulation on adsorption of aurous cyanide ion with activated carbon[J].The Chinese Journal of Process Engineering,2015,15(4):594-598.
[16]
桑巴里奥C H,仲崇波.活性炭在提金过程中的特性[J].国外金属矿选矿,1996(7):20-23.Sambario C H,ZHONG Chong-bo.Characteristics of activated carbon in the process of gold extraction[J].Metallic Ore Dressing Abroad,1996(7):20-23.
[17]
张文耀,陈鹏,安丰刚.活性碳吸附Au(CN)2-机理研究[J].新型碳材料,1992(3):52-55.ZHANG Wen-yao,CHEN Peng,AN Feng-gang.Study of adsorption mechanism of Au(CN)2-by activated carbon[J].New Carbon Materials,1992(3):52-55.
[18]
Mustafa Y,Ali I A.Gold cyanide adsorption characteristics of activated carbon of non-coconut shell origin[J].Hydrometallurgy,2002,63(2):201-206.
[19]
马振佳,陈雯,朱云,等.椰壳活性炭在炭浆法吸金阶段的吸附性能变化[J].矿冶,2014,23(5):52-55.MA Zhen-jia,CHEN Wen,ZHU Yun,et al.Adsorption property changes of coconut shell activated carbon during CIP gold adsorption stage[J].Mining & Metallurgy,2014,23(5):52-55.
