中色股份哈铜巴夏库项目2号球磨机开始安装

中国有色集团出资企业中国有色金属建设股份有限公司（简称中色股份）承建的哈铜巴夏库项目磨浮车间2号球磨机安装正式启动，哈铜巴夏库选厂项目设备安装进入新的阶段。中色股份承建的哈铜巴夏库项目磨浮车间2号球磨机为硫化矿区域核心设备，采用先进的无齿轮驱动型式，其中半自磨机12．192m×12．719m，为世界第三大半自磨机。     

半自磨机顽石作为实验室立磨机介质的磨损与磨矿研究

随着半自磨流程在国内大型矿山的日益普及, 对如何处理半自磨机磨矿过程中产生的顽石, 各选厂采用的方式不尽相同.利用半自磨机顽石充当立磨机磨矿介质处理这类顽石并对此开展顽石的磨矿条件试验研究, 包括:磨矿时间、充填率、磨矿浓度和磨矿处理量等条件试验, 以及顽石、钢球磨矿介质对比试验.试验结果表明:半自磨机顽石可以作为磨矿介质在立磨机内使用, 其损耗量相比较于传统钢球的损耗量 (大约0.05 %) 是较大的, 一般在1 %~2 %之间.在磨矿时间3 min、填充率60 %、磨矿浓度65 %、磨矿量5 kg时可获得满足浮选要求的磨矿产品.在磨矿时间3 min、立磨机转速210 r/min、磨矿浓度65 %、磨矿量5 kg、磨矿介质直径10~20 mm、充填率60 %的条件下进行顽石和钢球磨矿介质的磨矿对比试验, 结果表明, 钢球磨矿产品的细度比顽石磨矿高16.72 %, 过粉碎粒级产率高2.35 %, 钢球的磨矿效率大于顽石, 但顽石磨矿产品中0.045~0.038 mm的产率高于钢球磨矿, 说明顽石充当磨矿介质时易使被磨矿物磨细到嵌布粒度的大小, 会使产品粒度分布更合理.      

昆钢大红山提高8.53×4.27m半自磨机处理量实践

通过对半自磨机给料粒度合理搭配;调整半自磨机钢球尺寸;调整半自磨钢球补加量来控制磨机合适的充填率;格子衬板改造;排矿直线筛筛孔改造;半自磨机给矿自动化控制等改变了半自磨工艺,提高了处理量并降低了半自磨机的钢耗和电耗,达到了很好的效果。     

大型半自磨机混合充填率的研究与优化

通过对半自磨系统各控制参数的研究和分析,发现半自磨机混合充填率与功率、轴压、磨音等之间关系,通过对各控制参数进行优化,并对半自磨机排砾板进行改进,使半自磨机混合充填率趋于稳定,解决半自磨机钢球直接砸简体衬板问题,并提高磨矿效率,改善最终磨矿产品细度。     

半自磨机排矿速度及粒度优化研究

半自磨机磨矿介质由钢球和矿石自身组成,随着矿石硬度及块度的增加,造成半自磨机排矿速度偏慢及排矿粒度组成不合理,影响系统台效及电力、钢球等消耗。半自磨机为强制排矿碎磨设备,可通过改变排料端设计,将直形排料端改为弧形结构,优化半自磨机的排矿速度及粒度组成,达到提高半自磨系统磨矿效率的目的。     

棒磨机在锡铜硫化矿二段磨矿中的应用

对含锡硫化矿重选二段磨的给矿进行了实验室小型棒磨、球磨磨矿对比及摇床选别试验,并进行了工业磨矿试验研究。实验室小型试验结果表明相同的磨矿细度时棒磨机的磨矿时间比球磨机短,棒磨产品中适于重选选别的粒级(-0.1 mm~+0.019 mm)和金属分布率分别比球磨高10.96%、15.45%,采用捧磨的过粉碎产品少,更有利于重选回收锡。工业试验表明棒磨机的磨矿效率比球磨机高2.19%;棒磨机磨矿产品中新增加的-0.074 mm粒级比球磨机多1.96%;新增-0.019 mm粒级产率比球磨机的少0.93%,新增-0.019 mm粒级中锡金属含量比球磨机的少0.67%。     

大山半自磨机格子板优化实践

格子板是矿浆排出半自磨机的第一道关卡,其设计的合理性直接影响着半自磨机的产品粒度分布、磨机的磨矿效果、台效及系统电耗等.在德铜大山选厂采用弧形格子板结构,并对格子孔尺寸及排布进行优化,实现了提高半自磨系统台效、增加顽石量、降低系统电耗的目的.     

塔磨机在铜精矿细磨中的应用

主要论述了ETM-1000塔磨机的结构和原理,以及在某锡铜硫化矿选厂作为铜精矿细磨的应用实践及参数的确定,相比于传统的球磨机,其在磨矿效率、磨球单耗及能耗、排矿过粉碎方面都有明显的优势。     

特大型磨机在乌山铜钼矿的应用

乌山铜钼矿是国内最早应用国内自主研发的特大型半自磨机、球磨机的矿山企业之一。经过多年的生产实践,持续对磨矿工艺流程和设备进行优化改进:将SABC碎磨工艺流程改为SAB磨矿工艺流程,增大了处理矿量,解决了磨矿系统给矿及磨矿粒级分布等工艺指标不稳定的问题;提高磨机钢球充填率,缩减半自磨机格子板的顽石窗,采用区间优化加球法添加钢球,采用自动化控制方式。生产实践表明:近3年来设备运行平稳,设备运转率始终保持在92%以上。磨矿处理量已超过设计产能的15%,取得了巨大的经济效益。     

某钨选厂粗精矿分选试验研究

某钨选厂粗精矿采用分级粗粒枱浮硫化矿、细粒浮选硫化矿,浮选尾矿采用磁选优先选出一部分黑钨单体,分选尾矿磨至目的矿物单体解离后,先浮选硫化矿,再浮选白钨,重选分离锡石,所有硫化矿集中进行铜硫分离的工艺对粗精矿中的目的矿物进行分选。通过该工艺流程有效地分离了粗精矿中的钨、锡、铜、硫。获得钨精矿WO3品位≥60%,回收率≥88%,铜精矿Cu品位≥24%、回收率≥90%,锡精矿Sn品位≥45%、回收率≥70%。     

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。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.