钼镍矿强化浸出试验研究

研究了采用氧化焙烧—浓硫酸强化浸出工艺从钼镍矿中回收钼和镍。试验结果表明:钼镍矿氧化焙烧最佳温度为700℃,最佳焙烧时间2h;氧化焙砂在V(浓硫酸)/m(焙砂)=2mL/g、温度150℃条件下浸出3h,钼、镍浸出率分别为96.4%和85.6%。     

低品位镍钼矿加钙氧化焙烧试验的研究

对难选镍钼多金属矿进行了加钙氧化焙烧工艺试验研究。对氧化钙用量、焙烧时间、液固比、浸出温度等条件进行了试验研究，确定了各个因素最佳条件：氧化钙为镍钼矿的35％，焙烧时间2h，液固比2：1，浸出温度95℃。钼、镍的浸出率分别高达97％、93％，固硫率65％。     

氧压碱浸镍钼矿提钼试验研究

采用氧压-碱浸镍钼矿,在简要介绍和分析试验原理的基础上,以钼浸出率为考察指标,重点探讨加碱量、温度、时间、液固比、矿物粒度等参数对钼浸出率的影响。试验结果表明:在NaOH为100 g/L、Na_2CO_3/镍钼矿质量比为30%、反应温度100℃、反应时间5 h、液固比3∶1、粒度0.074~0.058 mm条件下,钼浸出率可达97%以上,Ni在浸出渣中含量提高1.43%以上,钼在浸出渣中含量可降低至0.78%以下,有效实现了镍钼矿中的镍、钼分离。     

从含钼石煤中提取钼的研究

采用XRD和光谱分析确定了含钼石煤中钼的主要物相。将石煤粉碎过0.074mm筛,添加碳酸钠造球,氧化焙烧,然后用水作为浸出剂浸出钼,考查了焙烧温度、焙烧时间和球团粒径对钼浸出率的影响。结果表明,最佳焙烧温度为650℃、焙烧时间为3h、球团粒径大小为5～15mm,在该条件下,钼浸出率可达96.32%。     

硫酸化氧化焙烧—水浸法从红土镍矿中提取镍钴

采用硫酸化氧化焙烧—水浸工艺从高铁低镁的红土镍矿中提取镍、钴,主要研究了硫酸用量、酸化氧化焙烧温度和时间、水浸时间、水浸液固比等因素对镍、钴浸出率的影响。结果表明,最佳工艺条件为:矿石粒度-1mm,按酸料比0.54在300℃焙烧1h再升至800℃焙烧2h,水浸液固比3∶1,水浸温度70℃,水浸时间2h,此时镍、钴浸出率分别达到91.00%和91.51%,铁浸出率仅为2.72%。     

镍钼矿全湿法浸出工艺研究

采用酸性氧化浸出-酸渣碱浸工艺对镍钼矿进行了浸出回收。结果表明:在盐酸用量为0.52 mol(每100 g原矿),固体氧化剂N1用量为原矿质量的60%,液固比为3∶1,温度90℃左右,浸出时间2 h的条件下,镍、钼浸出率分别为92%、60%;在氢氧化钠用量为酸浸氧化后干渣质量的45%,液固比为3∶1,温度40~50℃左右,浸出时间15 min的条件下,钼浸出率可达90%以上,钼的总回收率在96%以上。该工艺流程简单、能耗较少、镍钼回收率高,可避免火法脱硫的烟气污染。     

镍钼矿加压酸浸新工艺研究

提出一种加压酸浸处理镍钼矿的新工艺,考察温度、氧分压、液固比、时间等对镍钼转化率和浸出率的影响。结果表明,在液固比为5,氧分压为0.4 MPa,150℃反应2h的条件下,钼转化率可以达到98.3%以上,镍浸出率达到98.7%。     

低品位红土镍矿氧化焙烧—硫酸浸出试验研究

研究了以氧化焙烧浸出工艺从某红土镍矿中回收镍,考察了矿石焙烧、浸出工艺条件对镍回收率的影响.试验结果表明:在矿石粒度-0,074 mm占75％、焙烧温度800℃、焙烧时间2h、浸出温度70℃、浸出时间80 min、液固体积质量比1.5∶1条件下,镍浸出率在81％左右.     

铀钼矿硫酸焙烧过程动力学与熟料浸出研究

对于难处理铀钼矿而言,硫酸焙烧法可有效活化铀、钼组分并实现高效提取。焙烧过程正交试验结果表明,焙烧温度和焙烧时间对铀、钼浸出率均有较大影响,而酸矿质量比对铀浸出率影响更显著,硫酸浓度对钼浸出率影响更大。TG/DTG分析表明,整个焙烧过程可分为3个阶段：27.4～66.7、66.7～141.1、141.1～267.3 ℃;对应的Kissinger微分法反应活化能分别为17.592、16.878、38.660 kJ/mol。硫酸焙烧熟料浸出优化工艺参数为：浸出温度80 ℃、浸出时间3 h、液固体积质量比5 mL/g。     

镍钼矿综合利用过程及研究现状

镍钼矿是一种多金属难处理复杂矿,其中含有Mo 0.2%～8.0%,Ni 0.2%～7.0%,镍钼矿的开发利用越来越多地受到关注。介绍了我国镍钼矿资源的特点及分布情况,综述了镍钼矿的选矿处理、冶金处理提取镍、钼的工艺条件、应用情况及各自的优缺点,以及镍钼矿中其他有价元素,如钒和硒的综合回收利用。由于镍钼矿组成和结构复杂,选矿成本高,选矿产生的经济效益不明显。镍钼矿处理的传统工艺为直接还原熔炼法制取镍钼铁合金,或钠盐焙烧后水浸制取氧化钼,但工艺过程产生含SO2的烟气,环境污染大,产品档次低;目前镍钼矿提钼主要采用氧压碱浸、氧化焙烧-碱浸等工艺,以获得高品质的钼酸铵,及较高的钼回收率,但镍钼矿中的镍在工艺过程中未能得到有效的回收利用。镍钼矿采用加钙氧化焙烧-低温硫酸化焙烧-水浸处理工艺,可以同时将镍钼矿中的钼和镍回收,镍和钼的回收率分别达到92%和96%以上,而且能够避免SO2烟气的产生,具有工艺流程短、生产成本低、环境友好等优点。此外,镍钼矿生物处理工艺也展现出了很好的应用前景。     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources