湿式弱磁选从含钛高炉渣中提取金属铁的研究

基于攀钢高钛型含钛高炉渣综合利用现状,提出"磁选收铁-活化脱铝—酸浸提钛"的技术途径,以期实现含钛高炉渣中Fe、Al、Ti等有价元素的综合回收。采用X射线衍射仪和矿相显微镜研究了含钛高炉渣中矿物相的组成和金属铁在含钛高炉渣中的赋存状态。采用单一弱磁选和阶段磨矿-阶段弱磁选的工艺回收含钛高炉渣中的金属铁。结果表明:高炉渣中的主要矿物相为钙钛矿、透辉石和镁铝尖晶石,金属铁多以球粒状分布于透辉石等矿物颗粒中,含少量磁铁矿。采用阶磨、阶选的工艺在节约磨矿成本的同时可获得铁精矿的品位为63.5%,回收率为64.2%,有效回收了高炉渣中的金属铁,并为后续工艺中活化脱铝和酸浸提钛创造了有利条件。     

含钛高炉渣中钛组分最佳富集相的选择

由于含钛高炉渣中钛的分散分布(钙钛矿、镁铝尖晶石、攀钛透辉石、富钛透辉石和Ti(C,N)),使钛的回收利用变得困难.基于"选择性析出技术",研究含钛高炉渣中钛的选择性富集.该技术的第一步是渣中钛富集相的选择,经过对渣中钛可能生成矿物相的计算和对比分析后,确定渣中钙钛矿相是钛选择性富集的最佳矿物相.     

某磁铁矿选矿工艺试验研究

某磁铁矿石矿物组成复杂,为了充分利用其中的矿物资源,进行了该铁矿物的工艺矿物学研究及选矿工艺试验研究。结果表明该矿石具有钙镁高、硅铝低的特点,属碱性矿石的范畴;矿石中可供选矿回收的主要组分是铁。通过阶段磨矿阶段选别—中磁选回收流程可获得产率34.01%、品位65.36%、回收率72.50%的铁精矿;通过阶段磨矿阶段选别—强磁选回收流程可获得产率38.93%、品位59.62%、回收率75.69%的铁精矿。     

高钛型高炉渣选择性还原前后物相演变规律探讨

还原气氛下高炉渣中含钛物相的变化规律是高炉渣高温碳化的关键。实验综合偏光显微镜、扫描电镜(SEM)、矿物自动解理系统(MLA)和X射线衍射仪(XRD)对比还原前后高炉渣物相形貌变化,微区成分变化及物相组成变化规律。结果表明,还原前后高炉渣中串珠状的钙钛矿转变为弥散状的碳化钛,深绿色板状的富钛透辉石消失不见;微区成分变化显著的是钛元素也从还原前高炉渣中的钙钛矿、攀钛透辉石和富钛透辉石中逐渐转移到碳化钛相和残留的含钛透辉石相中,其含量占还原后全钛的73.69%以上;还原后物相组成明显的变化是钙钛矿和富钛深绿透辉石的减少,碳化钛含量明显增多。     

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。     

国外某风化型钒钛铁矿选矿试验研究

针对国外某深度蚀变氧化型钒钛铁矿,铁矿物与钛矿物难以物理选矿实现分离,脉石矿物的比磁化系数、比重与金属矿物差异较大、易磨矿解离的特征,开展了选矿富集钒钛铁试验研究,对比了磁选回收工艺、分级-磁选回收工艺及重选回收工艺,确定磁选回收工艺为最适宜的回收工艺.磁选回收工艺获得了可市售的含钒铁精矿含Fe 60.52％、V2O5...     

攀钢含钛高炉渣湿法提钛工艺

酸浸法提钛工艺可以获得较高TiO2含量的产物,但是该工艺所产生的酸浸液存在难回收的问题.采用碱浸法可以避免酸浸液回收的问题,但是该工艺流程比较复杂,钠盐的回收成本较高.酸碱法在理论上可以将含钛高炉渣转化为富钛料,然而该工艺流程相对复杂,工业应用还需要不断深入研究与完善.针对采用湿法工艺从攀钢含钛高炉渣中提钛的各项技术,从技术、经济、环保等方面进行对比分析,指出需要将湿法工艺与火法工艺联合,同时将一些外场冶金技术引入到含钛高炉渣的提钛分离过程中,从而有望高效、综合利用攀钢含钛高炉渣.      

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。     

碱法处理含钛高炉渣的矿相变化及工艺条件探索

采用XRF、XRD和金相显微镜分析含钛高炉渣的化学成分、物相组成和矿物形态,发现渣中含钛量高达20%,主要矿物相为钙钛矿、透辉石和镁铝尖晶石,各物相结合紧密、分布均匀。将Na_2CO_3与含钛高炉渣进行高温混合焙烧,焙烧熟料用去离子水进行水浸处理,以实现对含钛高炉渣中Si、Al组分的提取,同时实现对Ti组分的富集,达到分离三种有价组分的目的。通过研究焙烧温度、碱渣质量比和焙烧时间对组分浸取率的影响以及焙烧过程中矿物相的变化,结果表明:在焙烧过程中镁铝尖晶石先于透辉石与助剂Na_2CO_3发生反应,而钙钛矿不与Na_2CO_3发生反应。优化的焙烧条件为:焙烧温度900℃,碱渣质量比为2∶1,焙烧反应时间180 min,此条件下SiO_2和Al_2O_3的提取率分别达到47.52%和82.97%。     

广西平果铝赤泥资源化利用扩大试验

对广西平果铝赤泥整体资源化利用进行扩大试验,采用"铁还原熔炼→熔炼炉渣酸解→浸出→沉铝→萃钪→反萃钪→钪提纯"工艺综合回收赤泥中的有价金属铁、铝、钛和钪,浸出渣作为工业石膏得到应用。整个流程废水零排放。经济效益和社会效益显著。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.