Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Journal of Mining and Metallurgy Section B-Metallurgy Pub Date : 2021-01-01 DOI:10.2298/JMMB200911019Z

Y.P. Zhang, K. Yang, Y. Fang, A. Robledo-Cabrera, C. Peng, A. López-Valdivieso

引用次数: 1

Abstract

Pyrite concentrates with refractory gold and silver were roasted at different temperatures to improve the recovery of the metals by cyanide leaching. Scanning Electron Microscope characterization of the calcine revealed that the gold occluded in the pyrite less than one micron, and roasting produced channels in the concentrate, exposing the gold particles to the leaching solution. Gold and silver recoveries were maximum in the temperature range of 500-600?C due to the calcine high surface area and porosity. The Au and Ag recovery improved from 25 to 86% and 50 to 73%, respectively. The Au secondary encapsulation due to the sintering, the formation of the Ag-Fe-S species (Fe1?xS + Ag2S + Ag) and Ag ferrite in higher roasting temperatures hence Au and Ag recoveries decreased.

查看原文本刊更多论文

焙烧温度对黄铁矿精矿中难选金银回收率的影响

采用不同温度焙烧方法对含难浸金、难浸银的黄铁矿精矿进行氰化浸出，提高其金属回收率。通过扫描电镜对焙烧产物进行表征，发现金在黄铁矿中被遮挡的范围小于1微米，焙烧产物在精矿中形成通道，使金颗粒暴露于浸出液中。金、银的回收率在500 ~ 600℃范围内最高。C由于煅烧的高表面积和孔隙率。Au和Ag的回收率分别从25%提高到86%和50%提高到73%。由于Au在烧结过程中二次包封，形成Ag-Fe-S态(Fe1?在较高的焙烧温度下，xS + Ag2S + Ag)和Ag铁氧体降低了Au和Ag的回收率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Mining and Metallurgy Section B-Metallurgy 工程技术-冶金工程

CiteScore

2.00

自引率

40.00%

发文量

审稿时长

2 months

期刊介绍： University of Belgrade, Technical Faculty in Bor, has been publishing the journal called Journal of Mining and Metallurgy since 1965 and in 1997 it was divided in two independent journals dealing with mining and metallurgy separately. Since 2009 Journal of Mining and Metallurgy, Section B: Metallurgy has been accepted in Science Citation Index Expanded. Journal of Mining and Metallurgy, Section B: Metallurgy presents an international medium for the publication of contributions on original research which reflect the new progresses in theory and practice of metallurgy. The Journal covers the latest research in all aspects of metallurgy including hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, solidification, mechanical working, solid state reactions, materials processing, surface treatment and relationships among processing, structure, and properties of materials.