用SO_2从软锰矿中还原浸出锰的试验研究

研究了以软锰矿为氧化剂,硫酸溶液为介质,用SO_2还原浸出软锰矿中的锰。考察了硫酸用量、浸出时间、液固体积质量比、反应温度、搅拌速度、循环浸出次数等对锰浸出率的影响。结果表明,从软锰矿中浸出锰的最佳还原条件为:硫酸浓度0.46mol/L,浸出时间80min,液固体积质量比4∶1,温度40℃,搅拌速度300r/min,循环浸出5次,SO_2流量0.2L/min;最佳条件下,锰浸出率为95%以上。     

响应曲面法优化木薯渣—硫酸浸取软锰矿工艺的研究

探究木薯渣为还原剂在硫酸存在下浸取软锰矿中锰工艺条件,通过单因素试验和响应曲面试验,考查了木薯渣用量、液固比、硫酸浓度、温度以及反应时间对浸出结果的影响,实验表明:在取10g软锰矿进行试验时,浸锰最佳工艺条件为木薯渣用量5 g,硫酸浓度为3 mol/L,反应时间为150 min,温度是80℃,液固比为10∶1,其浸出率达到94.08%。     

石煤与软锰矿焙烧样耦合提取钒锰的动力学

为实现石煤与软锰矿焙烧样中钒锰的共提取,并解决石煤二段硫酸化焙烧过程中酸过量的问题,通过多因素研究探讨石煤与低品位软锰矿焙烧样耦合浸出工艺对钒锰共浸出率的影响,为石煤及低品位软锰矿焙烧样中钒锰资源高效综合利用提供了参考和依据。试验结果表明,当石煤与低品位软锰矿焙烧样的配矿比为1：1、矿浆液固比为5：1及浸出温度为80℃时,耦合浸出体系中钒的浸出率可达98．13％,而锰的浸出率可达99．45％。对耦合浸出体系的钒锰浸出动力学研究表明,钒浸出过程是通过固体产物层的内扩散控制,其表观活化能为22．401kJ／mol;锰浸出过程在低温区25～55℃下是通过化学反应控制,其表观活化能为57．232kJ／mol,高温区65～95℃下锰浸出过程是通过固体产物层的内扩散控制,其表观活化能为14．323kJ／mol。     

两矿法浸出低品位软锰矿的工艺研究

介绍了两矿法浸出低品位软锰矿的原理及工艺条件，在一定的工艺条件下，以硫铁矿作还原剂，用硫酸直接浸出Mn含量为25％左右的低品位软锰矿，浸出率达93％，该工艺具有能耗少，成本低，实用性强，锰回收率高等特点，为低品位软锰矿的利用开辟了新的途径。     

中药渣还原浸出软锰矿试验研究

通过正交试验和单因素条件试验,研究了用中药渣及硫酸还原浸出软锰矿,考察了硫酸用量、反应时间、反应温度和中药渣与软锰矿的质量比对锰浸出率的影响。结果表明,在软锰矿质量50g、硫酸用量35mL、反应时间5h、反应温度90℃、中药渣与软锰矿质量比0.6条件下,锰浸出率达96%以上,浸出效果较好。     

木薯渣—硫酸法浸出低品位软锰矿试验研究

研究了用木薯渣─硫酸法浸出低品位软锰矿,即以木薯渣作还原剂,在硫酸溶液中浸出低品位软锰矿。通过正交试验,考察了硫酸初始质量浓度、温度、固液质量体积比和反应时间对锰浸出效果的影响。结果表明,对锰浸出率影响较大的依次为温度、硫酸初始质量浓度、反应时间和固液质量体积比。单因素试验结果表明:锰浸出率随温度升高、硫酸初始质量浓度增大、反应时间延长和木薯渣添加量增加而提高;在温度90℃、硫酸初始质量浓度200g/L、反应时间4h、固液质量体积比1∶15、木薯渣与软锰矿质量比1∶6.79条件下,锰浸出率达97.32%。     

用硫化铅精矿还原酸浸低品位软锰矿试验研究

研究了以废铁屑作添加剂、硫化铅精矿作还原剂,用硫酸浸出低品位软锰矿,考察了配料质量比、温度、硫酸浓度、反应时间、液固体积质量比对锰浸出率的影响。试验结果表明:控制浸出条件可获得96.17%的锰浸出率,铅几乎全部进入渣中;锰的浸出与S0的形成及浸出温度密切相关,硫酸浓度(矿浆pH)对S0的形成影响最大;优化后的浸出条件为m(软锰矿)∶m(铅精矿)∶m(铁屑)=3∶1∶1,反应时间2h,硫酸浓度2mol/L,浸出温度90℃,液固体积质量比5∶1,矿石粒径-74μm占90%以上。     

玉米秸秆还原浸出软锰矿优化试验研究

通过单因素试验和正交试验,研究了玉米秸秆在酸性条件下的水解及还原浸出软锰矿,考察了硫酸用量、水解时间、水解温度、还原剂用量对锰浸出率的影响。结果表明:对50g软锰矿,在硫酸用量40mL、水解时间2h、水解温度90℃、还原剂用量30g条件下进行浸出,锰浸出率可达96%以上,浸出效果较好。     

用黄铁矿-硫酸还原浸出软锰矿工艺及动力学研究

研究了用黄铁矿-硫酸还原浸出软锰矿,考察了搅拌速度、两矿质量比、固液质量体积比、硫酸浓度及温度对锰浸出率的影响及浸出过程动力学,确定了浸出动力学方程。结果表明:当搅拌速度为300r/min、固液质量体积比为1∶5、硫酸浓度为0.8mol/L、黄铁矿与软锰矿质量比为0.2、反应温度为90℃条件下,锰浸出率达99%以上;浸出过程受化学反应控制,不同硫酸浓度下的反应级数为1.06,不同黄铁矿用量下的反应级数为0.82,表观反应活化能为46.265kJ/mol。     

粗纤维酸化处理软锰矿的研究

粗糠经水解后与软锰矿粉反应直接制备硫酸锰,并对影响因素及工艺条件选择进行了讨论。结果表明,在下述最优条件下锰的浸出率达95%以上:硫酸浓度50%、硫酸用量为1.2倍理论用量、粗糠用量20%、反应温度250℃、浸出时间75min。     

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