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Hydrometallurgical Processing of Gold-Containing Ore and its Enrichment Products
Metallurgist ( IF 0.8 ) Pub Date : 2021-05-11 , DOI: 10.1007/s11015-021-01150-9
P. K. Fedotov , A. E. Senchenko , K. V. Fedotov , A. E. Burdonov

This research focuses on the hydrometallurgical processing of auriferous ores and their processing products, namely, flotation and gravity concentrates. The main valuable component of an ore sample of any deposit is gold. The gold content should be in the range of 11.11–12.87 g/ton. The main rock-forming minerals of the original ore are quartz (60.1%), quartz–chlorite–micaceous aggregates (3.8%), and carbonates (7.1%). In this study, original ores of various sizes were treated by direct and sorption cyanidation under various leaching modes, and the results obtained were presented. The original ore was leached with various concentrations of sodium cyanide (NaCN) in solution to study the effect of the complexing agent concentration on gold recovery. Data on the dynamics of leaching revealed that a decrease in the concentration of NaCN in solution from 0.2% to 0.03% leads to a decrease in gold recovery in solution by 26.81%. Original ores could easily be processed using hydrometallurgical methods. The recovery of gold with a coarseness of 95% − 0.045 mm from the original ore averaged 97.77%.

This work features a full range of studies on the hydrometallurgical processing of concentrates and gravity tailings, as well as the effects of flotation concentration of gold recovery. The gravity concentrate is resistant to intensive cyanidation (i.e., only 67.07% gold recovery into the solution). The use of 1% lead nitrate (PbNO3) during intensive cyanidation could reduce the refractoriness of the concentrate and increase the recovery of gold into the solution by up to 94.35%. The total gold recovery from gravity concentrate is 98.71%, and the recovery of gold by cyanidation of gravity tailings with a cyanide concentration of 0.2% averages 96.57%. The recovery of gold during leaching of the flotation concentrate at the original size (95.5% − 0.074 mm) and a cyanide concentration of 0.2% is 96.64%. A decrease in the size of the flotation concentrate from 95.5% − 0.074 mm to 95% − 0.02 mm leads to a decrease in gold recovery by 35.43% because of the strong chemical activation of the material during grinding.



中文翻译:

含金矿石及其富集产品的湿法冶金加工

这项研究的重点是含金矿石及其加工产品(即浮选和重力精矿)的湿法冶金加工。任何矿床矿石样品的主要有价值成分是金。金含量应在11.11-12.87克/吨的范围内。原始矿石的主要成岩矿物是石英(60.1%),石英-亚氯酸盐-云母聚集体(3.8%)和碳酸盐(7.1%)。在这项研究中,在各种浸出模式下通过直接氰化和吸附氰化处理各种尺寸的原始矿石,并介绍了获得的结果。用溶液中各种浓度的氰化钠(NaCN)浸提原始矿石,以研究络合剂浓度对金回收的影响。浸出动力学数据表明,溶液中NaCN浓度从0.2%降低至0.03%导致溶液中金的回收率降低26.81%。原始矿石可以使用湿法冶金法轻松处理。从原始矿石中回收的具有95%-0.045 mm粗度的金的平均回收率为97.77%。

这项工作对精矿和重力尾矿的湿法冶金工艺以及浮选金回收浓度的影响进行了全面的研究。重力浓缩物可抵抗强烈的氰化作用(即,只有67.07%的金回收到溶液中)。使用1%硝酸铅(PbNO 3)在强烈的氰化过程中,可能会降低精矿的耐火度,并使金在溶液中的回收率提高多达94.35%。从重力精矿中回收的总金为98.71%,通过氰化物浓度为0.2%的重力尾矿的氰化回收的金的平均回收率为96.57%。在浮选精矿浸出过程中,原始尺寸(95.5%-0.074 mm)且氰化物浓度为0.2%时金的回收率为96.64%。浮选精矿的尺寸从95.5%-0.074 mm减小到95%-0.02 mm,由于在研磨过程中材料的强烈化学活化作用,导致金的回收率降低了35.43%。

更新日期:2021-05-11
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