氧压煮法从辉钼矿中提取钼铼的工业生产实践

本文简要介绍了氧压煮法从辉钼矿中提取钼铼的工艺和结果。着重对比了用硝酸钠和硝酸作催化剂氧压煮辉钼矿钼的分解率,以及氧压煮法与反射炉焙烧法处理辉钼矿的经济效益。硝酸钠比硝酸作催化剂氧压煮辉钼矿,钼的平均分解率提高6.32％,氧压煮法比反射炉焙烧法处理辉钼矿,从钼精矿到仲钼酸铵,钼的回收率提高9％,单位成本降低7％。     

一段锌氧压浸出与焙烧浸出工艺的比较

着重介绍了锌氧压浸出和焙烧浸出工艺原理、工艺方法及工艺流程,对锌氧压浸出中应用较多的一段锌氧压浸出工艺和二段逆流锌氧压浸出工艺作了详细分析,说明了一段锌氧压浸出除了对富含镓锗稀贵金属特殊矿的处理不具优势外,其他均优于二段锌氧压浸出;通过对一段锌氧压浸出和焙烧浸出工艺流程及技术指标的详细比较和分析,得出一段锌氧压浸出流程短捷,工序少;锌浸出率明显高于焙烧浸出工艺;总体投资比焙烧浸出工艺要减少6%以上,设备装机容量比焙烧浸出工艺要低20%~25%,总体耗电量低。阐明了锌氧压浸出工艺具有综合回收好,生产成本低,环境保护好,渣处理简便的优势,是一种环保、节能的清洁生产工艺,可以解决国内企业面临的环保及生产成本高的问题。     

含砷难处理精金矿预氧化工艺对比试验

对某含砷高硫金精矿进行了两段焙烧与酸性氧压浸出两种预氧化工艺的对比试验。结果表明,精矿在两段焙烧试验条件下金回收率为88.59%,酸性氧压浸出条件下金回收率95.6%。经济效益评估结果表明该矿石宜采用氧压浸出工艺处理。     

锌氧压渣中铁复相强化溶出规律及浸出动力学

在锌冶炼的氧压浸出工艺中,由于铁复杂相的存在,使得铁浸出率不高,导致锌氧压浸出渣中仍存在一定量铁资源未能有效回收。以广东某冶炼厂锌氧压渣为研究对象,首先进行详细的工艺矿物学研究,然后采用硫酸化焙烧-溶液浸出的方法对锌氧压渣中的铁复相进行强化分解及高效溶出。得到了较优的试验条件为:焙烧温度300℃、酸渣质量比0.4、焙烧时间2.0 h、浸出时间1.0 h、浸出温度80℃,液固比L/S=5/1,此时铁浸出率为83.31%,锌浸出率达到97.06%。最后,对铁复相的溶液浸出动力学进行了研究,得到了浸出反应的表观活化能为23.18 kJ/mol,并建立了半经验动力学方程。     

焙烧锂云母含氟量对锂溶出率的影响研究

对不同含氟量的焙烧锂云母进行了压煮溶出试验。结果表明：将焙烧锂云母的含氟量控制在2．5％以下，并采用适当工艺，可以使LiO2的溶出率达到97％～98％。     

多金属复杂金精矿硫酸化焙烧热力学分析

对多金属复杂金精矿硫酸化焙烧主要反应热力学数据进行计算,导出△GT^0-T函数,并绘制△GT^0-T图和lgPso2-lgPo2图。经分析可知,焙烧温度和焙烧气氛对多金属复杂金精矿硫酸化焙烧效果影响显著。对比高氧压气氛焙烧和常规氧压气氛焙烧lgPso2-lgPo2图得出,高氧压更有利于硫酸化焙烧。在高氧压气氛条件下（po2=0．42×10^5Pa）,硫酸化焙烧最适温度控制为963K．温度控制上限为1055K。     

从钼精矿压煮液中提取铼

主要介绍含铼钼精矿经过高压釜氧压煮，压煮淬萃取回收铼，经过４次结晶生成粗铼酸铵，最了子交换一成高铼酸和高铼本以及其经济效益。     

钨酸钠溶液的净化技术

一、前言现代钨精矿处理工艺的主要发展趋势是以碱压煮-溶剂萃取法代替传统的苏打烧结-浸出工艺。碱压煮视精矿种类不同可以分为苏打压煮、苛性钠压煮和苏打-苛性钠混合碱压煮三种方式。分解钨精矿得到的粗钨酸钠溶液含有硅、磷、砷、氟和钼等杂质,通常硅以 Si(OH)_n 和 SiO_3~(2-)、磷以正磷酸根和     

锂云母焙烧矿的氯化铵压煮过程的研究

本文考察了氯化铵压煮锂云母焙烧矿的浸出过程,着重研究了压煮温度、时间、液固比、氯化铵配比等因素对锂浸出率的影响,并建立了五因子二次回归数学模型,确定了最佳浸出条件。数模验证试验表明,锂的浸出率可达91％。数模对工艺方案选择及过程控制与预测有一定的实际意义。     

碳质银精矿富氧-氯化焙烧试验研究

对高硫高碳型碳质银精矿进行了富氧-氯化焙烧预处理试验研究,主要考察了氯化剂质量分数、焙烧温度、空气与氧气体积比、焙烧时间等因素对碳、硫去除率及金、银浸出率的影响。试验结果表明:在氯化剂质量分数10%、焙烧温度550℃、空气与氧气体积比1∶1.5、焙烧时间6 min的最佳焙烧条件下,金、银浸出率分别为98.51%、92.20%。同时,通过对比氧化焙烧、氯化焙烧和富氧-氯化焙烧3种预处理方法表明,富氧-氯化焙烧在处理高硫高碳型复杂银精矿方面具有明显优势。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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