共查询到20条相似文献，搜索用时 125 毫秒
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肃北县黑刺沟金矿属砾岩型金矿,该矿矿石属典型的含砷、硫微细粒难选金矿石。通过各种选矿试验,该矿矿石用全泥氰化法金浸出率低于１７％ ,浮选、焙烧氰化法浸出效果也不好,而用细菌预氧化、碱浸预氧化氰化法效果较好,金浸出率最高可达９２．４％ ,是处理该类矿石较有效的选矿方法。 相似文献
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<正> 一、前言河下硫铁矿属于煤系沉积类型,位于山西省阳泉市东南。矿石品位贫富差别较大,目前存在着大量贫矿石不能回收利用的问题。为了充分利用这一矿产资源,我们在为地质评价所做的选矿试验报告基础上,对选矿工艺流程进一步做了浮选试验、重选试验和浮选浓度对比试验,均取得了较好的结果,为今后合理地开发和利用这一地区的矿产资源,提供了一定的依据。本试验所提供的浮选流程,具有流程结构简单、药剂消耗量低、磨矿粒度粗和浮选时间 相似文献
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为了查明灵宝小秦岭金矿田地质构造、分布范围和富集规律,对深部探矿方向提出建议。通过实践,对成矿条件及相关伴生有益组分富集规律进行了全面系统地收集整理和研究;通过选矿调查,对伴生有益组分资源利用提出新探索。提出了找矿(金以及伴生有益组分)方向,并针对性地提出了以"全泥氰化—重选—优先浮选"为中心的整体选矿工艺新思路,做到伴生有益组分综合利用,提高经济和环保效益。 相似文献
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浙江某地浸染型金矿石柱浸试验 总被引：1，自引：0，他引：1
该区矿石金品位低,金矿物细微分散,硫化物矿物稀少,采用浮选、重选、混汞或全泥氰化等技术工艺难以回收利用.选用柱浸法,金浸出率高,浸出速度快,是浸染型金矿石提取金的理想方法.文中介绍了试验步骤及结果. 相似文献
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通过对某难处理含铜金矿的选矿试验，确定了适合该矿性质的浮选－氰化选矿工艺，获得了满意的金回收率，同时对该工艺中影响金回收的主要因素进行了讨论。 相似文献
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江山铅锌金矿选矿试验研究 总被引：1，自引：0，他引：1
针对江山铅锌金矿品位低,矿物组成复杂的特点,采用"铅-锌-硫优先浮选,硫(金)精矿氧化焙烧预处理-焙砂氰化浸金"的工艺,金在铅(金)精矿、锌精矿、硫(金)精矿中的总回收率为81.25%。可使硫(金)精矿中96.89%的硫以二氧化硫的形式得到回收,对原矿的回收率为73.25%;金的作业浸出率达84.76%,对原矿的回收率为31.91%;浸渣中的铁品位达57.99%,对原矿的回收率为26.71%。通过试验研究与分析,确定适宜的选矿工艺及药剂制度,为今后合理开发该区矿石提供技术依据。 相似文献
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《矿物学报》2013,(Z1)
Gold has been present throughout the history of mankind and used to make jewelry and coins, and recently, acquired several industrial uses. The price of gold in international market had a significant increasing, surpassing 100% in the last five years. Thereby, deposits with low levels of gold content, gold with complex associations or in a very fine particle size became exploitable again, allowing new projects and expansion of existing ones. However, for maximum process efficiency is indispensable a deep knowledge of the characteristics of these minerals and their behavior in face of beneficiation processes. Consequently, an accurate routine for mineralogical and technological characterization is essential. 相似文献
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Gold recovery from a refractory pyrrhotite ore by biooxidation 总被引：1，自引：0，他引：1
S. Ubaldini F. Vegli F. Beolchini L. Toro C. Abbruzzese 《International Journal of Mineral Processing》2000,60(3-4)
The aim of the present investigation was to study the biooxidation of a refractory gold-bearing pyrrhotite, in order to increase the gold recovery during the subsequent conventional cyanidation.Bacterial cultures utilised in the biological test consisted predominantly of Thiobacillus genus. Tests were conducted at laboratory scale. The gold content of the ore sample, coming from Bolivia, was of 10 g t−1 Au.After 24 h leaching time by direct cyanidation, low gold recovery was obtained (<20% Au), with a high reagent consumption. On the other hand, a high gold recovery was achieved for the biooxidated samples: after 24 h cyanidation gold dissolution reached about 91% Au.Experimental results have shown the technical feasibility of the biooxidative pretreatment prior to conventional leaching and a complete circuit of treatment, on laboratory scale, has been developed considering also the subsequent gold recovery by carbon adsorption/desorption and electrowinning.A gold extraction yield of about 86% was determined in the whole process for gold extraction from pyrrhotite (biooxidation, solid–liquid separation, cyanidation, adsorption, desorption, electrowinning). 相似文献
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通过对金矿石化学及矿物组成、自然金形态、嵌布粒度、嵌布方式等深入研究,查明了该矿石性质。利用浮选法和氰化法进行可选性试验研究,浮选试验精矿品位为46.86 g/t,回收率达85.14%,氰化试验最高浸出率96.38%。综合分析认为,采用浮选法选矿较合理。 相似文献
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The counter-current gas-fluidized cascade (CFC) is a novel pneumatic device for separating mixed granular solids according to specific gravity. The possible utility of the CFC for beneficiation of coal in all size-ranges is presently under investigation, and in this paper some results are reported on pyrite beneficiation of synthetic pyrite-coal mixtures, and also on pyrite and ash beneficiation of as-received coal. The (geometric) mean particle size, by weight, of the coal used with added pyrite was 153 μm, and of the natural coal 233 μm. Preliminary results on the concentration of pyrite and ash in the reject streams indicate that CFC has some potential of being a simple and low-cost device for coal beneficiation. 相似文献
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甘肃阳山金矿床含砷黄铁矿及毒砂的XPS研究 总被引：9，自引：4，他引：5
阳山金矿是西秦岭地区新发现的超大型金矿.载金矿物中元素的赋存状态是认识成矿机理、评价矿床采选冶过程对环境影响的重要依据.作者运用XPS技术测定了载金矿物含砷黄铁矿和毒砂新鲜断裂面的As3d、Fe2p及S2p的存在形式和相对原子百分含量.结果表明,在含砷黄铁矿表面,超过50%的As以As~(-1)形式存在,约18%～20%的As以As~(3+)形式存在,约30%的As以As~(5+)形式存在.在毒砂表面,超过60%的As以As~(1-)形式存在,约30%的As~(3+)形式存在,其余10%的As主要以As~(3+)形式存在.分析证明As、Fe、S等元素在含砷黄铁矿和毒砂中主要以As`(1-)、Fe~(2+)、S~(1-)形式存在外,As元素可能还以As~(3+)形式存在于含砷黄铁矿及毒砂结构中. 相似文献
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野外微量金的快速测定 总被引：4，自引：0，他引：4
介绍了稀王水冷浸取，硫代米虫酮显色，以聚丙烯滤棒为载体，一次完成富集、显色的野外测定微量金的方法。对实际金矿样品进行测定，精密度（RSD，n=10）＜6％；对国家级标准物质进行测定，结果与标准值相符 相似文献