期刊文献+

碳质金矿石预氧化焙烧堆浸提金的研究 被引量:17

Experimental Study on the Gold Extracted from Carbonaceous Gold Ore Leached in Heaps by Preoxidized Roast
下载PDF
导出
摘要 介绍了对辽宁丹东某金矿碳质硅化低硫金矿石的焙烧预氧化处理及焙砂直接堆浸的试验研究·分析了不同温度、不同气氛及不同时间条件下的焙砂的氧化状态及影响金浸出率的NaCN的质量分数、喷淋强度、焙砂粒度及喷淋时间等主要因素·实验结果表明,先在450℃,通入少量空气(含氧5%~10%)的条件下,焙烧1h(脱砷),然后,在650℃,通入充足空气的条件下,焙烧2h,矿石中的硫化物和碳物质的氧化率和灰化率分别达98%和97%;当NaCN的质量分数为0 10%~0 15%,喷淋强度为15 0L/(m2·h),焙砂粒度为0~3mm,喷淋时间为8~10天,金的浸出率为84 8%·同时,推荐了焙砂直接堆浸的原则工艺流程,为该类碳质金矿石预氧化焙烧直接堆浸提金新工艺的工业应用奠定了基础· The preoxidized roast process and direct leaching in heaps of the roasted ore from a low-sulfur carbonaceous silicified gold mine in Dandong, Liaoning Province were studied experimentally, of which the roasted /oxidized conditions of gold ore and main influencing factors on leaching rate of gold were investigated under different temperatures, atmospheres and times, such as the weight% of NaCN, spraying intensity, grain size of roasted ore and spraying time. As a result, the oxidizing rate and ashing rate of the sulphides and carbonaceous material can be up to 98% and 97%, respectively, if roasting the ore for 1 h (for dearsenification) at 450 ℃ and ventilated with a bit of air to provide 5%~10% of oxygen content in air and, further, roasting it for 2 h at 650 ℃and ventilated with full air. The leaching rate of gold is 84.8% if the weight% of NaCN is 0.10%~0.15%, spraying intensity 150 L/(m^2·h), grain size of roasted ore 0~3 mm and spraying time 8~10 days. The basic technological process of direct leaching in heaps of roasted ore is recommended with the intention of laying a foundation for industrial applications.
出处 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2004年第2期171-174,共4页 Journal of Northeastern University(Natural Science)
基金 国家自然科学基金资助项目(50074015)
关键词 碳质金矿石 预氧化焙烧 焙砂 堆浸 喷淋强度 浸出率 carbonaceous gold ore preoxidized roast roasted ore heaped leading spraying intensity leaching rate
  • 相关文献

参考文献10

  • 1刘建军,梁经冬,曾子高,陈淳.国内外固化焙烧难浸金矿工艺的现状及在我国应用的前景[J].国外金属矿选矿,1997,34(2):35-39. 被引量:19
  • 2吴敏杰,白春根.碳质金矿中碳质物的物质组成及其与金的相互作用[J].黄金,1994,15(6):29-35. 被引量:19
  • 3Thomas K G. Alkaline and acid autoclaving of refractory gold ores[J]. Journal of Metals, 1991,43(2):16-23.
  • 4Taylor P R, Yin Z B, Barrtlet R W. Lime roasting of pyrite[J]. Gold, 1990,6:411-419.
  • 5朱观嶽.国内外高砷含碳金矿石的选别[J].国外金属矿选矿,1991(7):59-64. 被引量:1
  • 6苏国辉.论砷金矿焙烧工艺的现实意义[J].黄金,1987,5:34-38.
  • 7Fermandez M A,Segarra M,Espiell F. Selective leaching of arsenic and antimony contained in the anode slimes from copper refining[J]. Hydrometallurgy, 1996,(41):255.
  • 8Broods G A, Rankin W J. Solid-solution formation between arsenic and antimony oxides[J]. Metallurgical and Materials Transaction B, 1994,25B(12):865.
  • 9Colman E A, Bodman G B. Moisture and energy conditions during downward entry of water into moist and layered soils[J]. Proceseding of Soil Soc Am, 1945,9:3-11.
  • 10Liddlell K S. Machines for fine milling to improve the recovery of gold from calcines and pyrite gold 100[J]. South African Institute of Mining and Metallurgy, 1986,2:405-417.

二级参考文献2

共引文献37

同被引文献238

引证文献17

二级引证文献233

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部