三水型铝土矿磁选除铁及Al_2O_3溶出性能研究

研究了三水型铝土矿磁选除铁和高压溶出氧化铝,考察了磨矿时间、磁场强度对磁选除铁的影响以及石灰添加量、碱质量浓度、溶出时间对氧化铝相对溶出率的影响。试验结果表明:在磨矿时间10min、磁场强度1.7T磁选除铁条件下,Al2O3回收率为76.68%,Fe2O3脱除率为83.54%;在石灰添加量4%、碱质量浓度180g/L、溶出时间45min条件下,Al2O3相对溶出率达93.65%。     

用硫酸从粉煤灰中直接浸出氧化铝

研究了用硫酸直接从循环流化床粉煤灰中浸出氧化铝,考察了温度、浸出时间与硫酸浓度等因素对氧化铝浸出率的影响。结果表明：浸出温度和时间对Al2 O3浸出率影响较大,硫酸浓度影响较小;在浸出温度180℃、浸出时间5 h、液固体积质量比5∶1、硫酸初始浓度3．7 mol/L条件下,Al2 O3浸出率达94．16％,Fe2 O3浸出率为95．1％,其他杂质浸出率都较低。     

中低品位高硫铝土矿焙烧脱硅研究

采用"闪速焙烧—碱溶"工艺对某中低品位铝土矿脱硅,考察了焙烧温度、脱硅液固比、碱浓度、脱硅温度、脱硅时间对SiO2脱除率和Al2O3损失率的影响。结果表明,最佳单因素条件为:焙烧温度1 000℃、脱硅液固比L/S=10∶1、碱浓度NK=110g/L、脱硅温度95℃、脱硅时间20min,最佳条件下SiO2脱除率在46%以上,Al2O3损失率低于3%,A/S由焙烧矿的4.3提高到铝精矿的8.4。该方法可应用于拜耳溶出生产。     

湖南醴陵浦口地区石英砂砾岩综合利用试验研究

针对湖南省醴陵市浦口地区樟树湾组中的沉积型石英砂岩矿矿石中有害杂质Fe2O3 、Al2O3含量不符合要求的问题,通过查明矿石中矿物特征、各种组分含量以及赋存状态,选定脱泥-磨矿-磁选-分级-磨矿-混合酸浸出的石英砂提纯试验流程,结果显示,最终获得的0.417 ～0.104mm普通石英砂产品中含SiO299.80％、Fe...     

高钛铝土矿磁选分离特性及含铝尾矿溶出性能研究

研究某高钛铝土矿在不同磁场强度、磁选液固比及磁选时间条件下钛(铁)和铝的分离特性,并研究了磁选后含铝尾矿在不同溶出条件下的溶出特性。结果表明,在磁场强度19.5kA/m、磁选液固比5∶1、磁选时间4min时,铝回收率为75.19%,钛、铁脱除率分别为57.45%和73.95%。含铝尾矿在溶出时间45min、石灰添加量2%、碱浓度180g/L时,氧化铝实际溶出率为80.95%。磁选工艺能较好地实现高钛铝土矿中钛(铁)和铝的分离,且分离后含铝尾矿具有较好溶出特性。     

湖北低品位钨钛多金属矿综合回收试验研究

湖北十堰低品位钨钛多金属矿原矿含Fe为25.64%,TiO2为6.22%,WO3为0.26%,铁以磁铁矿为主、钛以钛铁矿为主、钨以黑钨矿为主。采用弱磁选回收铁得铁精矿、强磁选得钛钨混合精矿、复合摇床重选分离钨钛得钛精矿和钨精矿。铁、钛、钨分选试验得出,在一段磨矿细度为-0.045 mm占95%、弱磁选磁场强度H=0.10 T、二段磨矿细度为-0.038 mm占95%、强磁选磁场强度H=1.0 T的弱磁选—强磁选—重选工艺综合条件下,得到了Fe品位为62.76%,含TiO2为0.79%,WO3为0.09%,铁回收率为56.20%的铁精矿;WO3品位为65.01%,含Fe为10.18%,TiO2为2.01%,钨回收率为49.67%的钨精矿;TiO2品位为48.10%,含Fe为21.06%,WO3为0.98%,钛回收率为71.01%的钛精矿,实现了有价金属铁、钛、钨的综合回收。     

某难选铁矿中性磁化焙烧-磁选试验研究

在中性气氛中,对以菱铁矿为主的某复杂难选铁矿石进行了磁化焙烧-磁选工艺研究。试验结果表明,最优工艺条件为：焙烧温度700℃,焙烧时间60 min,磨矿细度95％-0．044 mm,粗选作业磁场强度均为151．24 kA/m,精选磁场强度39．80 kA/m。获得TFe品位55．55％,回收率720．1％的铁精矿。     

尾矿中回收铁和锡的工艺试验研究

利用高梯度磁选装置对某50 t/d选厂产生的尾矿(TFe=39.46%,Sn=0.71%)进行磁选试验研究,分析了给矿浓度、磨矿细度和磁场强度对尾矿磁选效果的影响;但由于该尾矿中锡品位较高,且有一定的回收价值,而单一磁选法又不能同时有效回收锡、铁元素;因此,本文通过重-磁联选工艺,可得锡品位为3.01%、锡回收率为38.22%的锡富中矿及铁品位为50.02%、铁回收率为71.42%的铁精矿。     

煤基直接还原-球磨磁选分离钒钛磁铁精矿中铁的研究

在添加硼砂的条件下进行了煤基直接还原-球磨磁选分离钒钛磁铁精矿中铁和钒钛的研究。试验中分别考查了还原温度、还原时间、磨矿细度和磁场强度对钒钛磁铁精矿的还原磨选行为的影响。结果表明,在1 050℃下还原100 min,磨矿细度为-0.045 mm占84.88%以及磁场强度800 Gs时,钒钛磁铁精矿通过还原-球磨磁选后获得的铁精粉品位高达90.32%,铁回收率达到95.20%,可用于电炉炼钢;其尾矿为富钒钛料,可用于钒钛回收利用。     

云南复杂含钪多金属矿的综合利用试验研究

云南复杂含钪多金属矿原矿含Fe 26.65%,TiO_2 8.68%,Sc2O388.60 g·t~(-1)。矿石中有价矿物主要为磁铁矿、钛铁矿、金红石,钪主要分布于钛辉石和辉石中。采用螺旋溜槽重选工艺预选抛尾得到铁-钛-钪混合粗精矿;采用弱磁选—摇床重选分选工艺进一步分离混合精矿中的铁、钛、钪。试验结表明,在一段磨矿细度为0.154 mm占98%、混合粗精矿二段磨矿细度为0.038 mm占98%、弱磁选磁场强度H=0.10 T的综合条件下,得到了Fe品位为56.21%%,铁回收率为20.10%的铁精矿;TiO_2品位为48.68%,钛回收率为3.81%的钛精矿;Sc_2O_3品位为226.20 g·t~(-1),钪回收率为87.67%的钪精矿。实现了矿石中有价金属铁、钛、钪的综合利用,且钪精矿可作为后续工艺进一步提纯钪的原料。     

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.