共查询到20条相似文献,搜索用时 109 毫秒
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介绍了西石门铁矿复杂的残留矿体及矿柱,根据残留矿体及矿柱的赋存条件,西石门铁矿制定了一整套有效的回收技术及安全措施,实施后回收了大量残留矿量及矿柱,充分利用了矿产资源,延长了矿山服务年限. 相似文献
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介绍了“冷焊”及密封锁固技术较传统热焊接,热喷漆,电镀及密封锁固技术,以及圆柱固持技术的不同、基本工作原理及技术特点。详细介绍了固化反应过程及反应过程中温度控制点和控制时限。列举了典型零件的“冷焊”工艺及方法,平面密封技术和圆柱固持技术的工艺、方法及注意事项。还介绍了“冷焊”及密封锁固技术的安全要求及应用范围。 相似文献
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便携式多功能相序及电量测量仪 总被引:2,自引:0,他引:2
概述了便携式多功能相序及电量测量仪的系统构成及软件设计方法。介绍了利用软件判断相序及利用数值算法计算各电量参数的原理及实现方法。 相似文献
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分析了工业泵叶轮不平衡的原因及不平衡对泵装置运转的影响,介绍了使叶轮平衡的两种方式及选择条件,举例说明了叶轮平衡方法的选择及过程. 相似文献
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阐述了当代露天煤矿开采概况及特点,规模及设备大型化、开采集中化、开采工艺多样化等。指出露天煤矿开采面临挑战。并概述了我国露天煤矿开采特点,不利条件,80年代以来的变化及发展。介绍了主要露天采煤国家露天煤矿可持续发展的经验及问题,我国的差别及借鉴。 相似文献
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氰化物存在情况下铅锌矿回水利用的几个问题 总被引:1,自引:0,他引:1
针对目前仍在使用氰化物作抑制剂的硫化矿浮选矿山回水利用而导致选择性下降的问题,通过浮选和吸附试验,讨论了铜离子浓度和pH值对铅锌矿含氰废水回水利用的影响。含氰废水中的铜氰络离子的状态影响回水的利用,浮铅废水和浮锌废水应分开应用;含氰废水的pH值应不低于9。 相似文献
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本文针对含铜氰化液进行了氧化沉淀脱铜试验研究,主要开展了氧化脱铜氧化试剂用量、脱铜和沉淀pH、氧化和沉淀时间条件试验,试验结果表明:氰化贵液在氧化试剂0.25kg/m3氧化2小时,调节氧化后液溶液pH=10.50沉淀1小时,氧化沉淀后液溶液铜氰比小于1,活性炭吸附后,载金炭金品位达到3.5kg/t,铜品位仅1-2kg/t。 相似文献
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Cyanide has been widely used as an essential raw material in several industries including textile, plastics, paints, photography, electroplating, agriculture, food, medicine and mining/metallurgy. Because of its high affinity for gold and silver, cyanide is able to selectively leach these metals from ores. Cyanide and cyanide compounds in wastewater streams are regulated. Residues and wastewater streams containing cyanide compounds have to be treated to reduce the concentration of total cyanide and free cyanide below the regulated limits.Natural degradation reactions can render cyanide non-toxic, resulting in carbon dioxide and nitrogen compounds. These natural reactions have been utilised by the mining industry as the most common means of attenuating cyanide. However, the rate of natural degradation is largely dependent on environmental conditions and may not produce an effluent of desirable quality in all cases year round. Technologies that include chemical, biological, electrochemical and photochemical methods have been developed to remove cyanide and cyanide compounds to below the regulated limits in wastewaters. This paper discusses commercially available and emerging methods for removing cyanide from waste streams, particularly from tailings and tailings reclaim waters that are generated in the gold mining processes. 相似文献
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采用三辛基甲基氯化铵(N263)-磷酸三丁酯(TBP)-正辛醇-磺化煤油协同萃取体系从金矿氰化废水中富集和回收有价金属,主要研究了N263与TBP的浓度、振荡时间、水相初始pH、相比(O/A)对铜氰络合离子萃取率的影响及协同萃取反应机制。研究表明,采用N263(20 vol.%)-TBP(15 vol.%)-正辛醇(10 vol.%)-磺化煤油体系在室温,O/A为1:1,pH值为10、混相时间为5min的条件下,废水中铜离子的单级萃取率可达到为98.9%,饱和萃取容量为19576 mg/L。饱和负载有机相经1 mol/L NaOH+5 mol/L NaSCN溶液反萃,在相比(O/A)为2:1的条件下,单级反萃液中Cu离子浓度可达到23000 mg/L,实现了废水中铜氰络合离子的有效富集。萃取过程中铜氰络合离子优先与TBP结合从而失去亲水性,随后再与N263阳离子发生离子缔合反应进入有机相。 相似文献
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复杂金矿的预处理工艺研究 总被引:6,自引:1,他引:6
对含Cu、Zn等耗氰矿物的浮选金精矿,采用“在常温常压下及中碱性介质中以预处理剂浸出除杂,然后氰化”的工艺,金浸出率可达95%以上,氰化钠耗量低于5kg/t。对精矿脱药方式和再磨细度、预处理时间、预处理剂浓度、预处理剂耗量和循环再生性能、矿石适应性能等工艺条件及预处理剂残余物对后续氰化浸出和锌置换的影响的研究表明,该工艺具有操作简便、药耗低、母液循环再生性能良好和氰化浸出指标可靠等特点。 相似文献
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A review of copper cyanide recovery technologies for the cyanidation of copper containing gold ores 总被引:1,自引:0,他引:1
Many gold producers are today processing gold ores containing significant amount of cyanide soluble copper. Typically, cyanide destruction is used to prevent the discharge of copper cyanide into tailings storage facilities. This imposes a significant financial cost to producers from the additional cyanide used to solubilize the copper and the cost of cyanide destruction reagents. Therefore, the recovery of copper as a valuable by-product and the recycle of cyanide to the leach circuit have the potential for significant economic and environmental benefits. This includes enabling the treatment of gold ores with even higher soluble copper. Over the years, a variety of processes have been developed or proposed to recover the copper and/or cyanide including acidification based technologies such as AVR and SART, direct electrowinning, activated carbon, ion exchange resins, solvent extraction, polychelating polymers, and membrane technologies. In this paper, these processes are critically reviewed and compared, with particular focus on the advantages and limitations, and the separation of copper from cyanide. Ultimately, there is no universal process solution and the choice is highly dependent on the nature of the stream to be treated and integration with the whole processing plant. 相似文献
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刘春龙 《有色金属(选矿部分)》2016,(3):38-42
某银矿氰化渣含铜、铅、锌、银、金等多种有价元素,综合回收总体价值高。针对该氰化渣特点,采用铅、铜、锌优先浮选工艺,获得了铅品位和铅回收率分别为50.98%和32.09%的铅精矿、铜品位和铜回收率分别为17.61%和81.49%的铜精矿以及锌品位和锌回收率分别为49.52%和64.11%的锌精矿,金、银在铅、铜、锌精矿产品中得到富集,为该氰化渣综合回收利用提供了依据。 相似文献