采用硫酸熟化—水浸工艺从锂云母中提取锂铷铯

采用硫酸熟化—水浸工艺进行综合提取锂云母中锂、铷、铯的研究,考察了硫酸浓度、酸矿比、熟化温度、熟化时间、浸出温度、液固比等对锂、铷、铯浸取率的影响。结果表明,提取锂、铷、铯的最优工艺条件为:酸矿比1∶1、硫酸浓度70%、120℃熟化8h、液固比4∶1、50℃浸出1h。在此条件下,锂、铷、铯的浸出率分别为91.42%、88.83%、90.09%。     

氯化焙烧-水浸工艺提取锂云母矿中铷、铯、锂

以锂云母矿为研究对象,进行了硫酸熟化-水浸、氟化酸浸、碳酸钙焙烧-水浸、硫酸钙焙烧-水浸、氯化焙烧-水浸工艺探索试验,确定了氯化焙烧-常温水浸工艺更适用于锂云母矿综合提取铷、铯、锂,同时考察了该工艺下焙烧温度、焙烧时间、添加剂种类及用量、浸出液固比、浸出时间对铷、铯、锂浸出率的影响。结果表明：在添加剂氯化钙用量50%、碳酸钠用量20%、焙烧温度750℃、焙烧时间6 h、浸出液固比1∶1条件下,锂云母矿经氯化焙烧-常温水浸1 h可获得95%以上的铷浸出率、94%以上的铯浸出率、87%以上的锂浸出率,同时在焙烧过程中碳酸钠吸收氯化钙释放的含氯气体,使该工艺的环境污染小。     

氯化焙烧—水浸从锂云母精矿中提锂试验

采用氯化焙烧—水浸的方法从某Li₂O品位为3.23%的锂云母浮选精矿中回收锂,考察了焙烧过程中氯化剂用量、焙烧温度、焙烧时间,浸出过程中液固比、浸出温度、浸出时间对Li₂O浸出率的影响。结果表明:在CaCl₂用量为锂云母精矿质量的3/4,焙烧温度900℃,焙烧时间40min,焙烧渣在液固比3∶1,室温浸出40min的条件下,Li2O浸出率可达到95.36%,回收效果较好。     

含钾、铷、锂云母矿综合回收试验研究

以江西某含钾、铷、锂云母矿为原料,研究了氯化焙烧工艺综合回收有价多金属工艺,考察了添加剂种类、焙烧温度、焙烧时间、添加剂用量、磨矿粒度等因素对试验结果的影响。研究结果表明,最佳工艺为锂精矿磨矿至-0.047 mm 75%,添加用量35%,在850℃下焙烧2 h。锂、铷、钾浸出率分别达到85%、85%和95%。该工艺具有成本低、浸出率高的特点。     

从锂云母浸出液中分离铷铯试验研究

采用溶剂萃取法对某锂云母浸出液中的铷、铯进行分离试验。考察萃取剂浓度、料液碱度和萃取相比对铷、铯萃取分离效果的影响。萃取分离铯、铷的较优条件为:萃取剂t-BAMBP浓度0.7mol/L、环己烷+磺化煤油为稀释剂、相比O/A=1、料液碱度0.3mol/L、萃取时间10min,铷萃取率为90.0%,铯萃取率为32.0%。负载有机相洗涤条件为:洗涤液氯化钠浓度0.1mol/L、相比O/A=1、洗涤时间10min,铷洗脱率为80.0%,铯洗损率为9.36%,分离效果较好。     

锂云母提锂工艺及工业化应注意的问题

正本文根据实验室的研究成果和工程化经验,对锂云母提锂的几种主要工艺进行综合比较分析,指出各种工艺的优缺点,并介绍了氯化钠压浸法提锂及资源综合利用产业化方面的经验,提出了锂云母提锂工艺工程化选择时应该考虑的问题及基本思路。含锂的矿物约有145种,具有工业价值的有锂辉石、锂云母、透锂长石、铁锂云母和磷锂云母,其中锂云母是主要的提锂原料之一。我国锂云母资源储量丰富,其中江西宜春的锂云母资源相对集中,开采条件优越,并且含有昂贵的铷、铯资源和大量的有     

粉末压片制样-X射线荧光光谱法测定锂云母中铷、铯及主量组分

锂云母中铷、铯及主量元素的分析一般采用化学湿法,前处理过程复杂。实验采用粉末压片制样-X射线荧光光谱法(XRF)对锂云母中铷、铯及主量组分(二氧化硅、三氧化二铝、全铁、氧化钙、氧化钾、氧化钠)进行了测定。采用锂矿石标准物质和人工合成校准样品制作校准曲线,各组分的均方根为0.0042~0.49。校准曲线采用经验系数和康普顿散射线内标法校正组分间的吸收-增强效应,方法的检出限为3.1~188μg/g。按照实验方法测定锂矿石标准物质GBW 07152中铷、铯及主量组分,结果的相对标准偏差(RSD,n=10)在0.31%~5.0%之间。实验方法用于测定人工合成校准样品(未参与校准曲线的绘制)中铷、铯及主量组分,测定值与理论值吻合良好;测定2个锂云母实际样品中铷、铯及主量组分,测定结果与电感耦合等离子体原子发射光谱法(ICP-AES)的测定值相符。     

宜春锂云母石灰石烧结法提锂母液中回收钾、铷、铯的研究

一、前言 江西宜春锂云母精矿除含丰富的锂外,还有较多的铷,铯、钾等有用元素。继石灰石烧结法提取锂盐的研究完成后,我们又研究了从提锂母液提取钾(钠)、铷、铯的工艺流程。提取了纯度>95％的碳酸氢钾、纯度>95％的氯比铯以及纯度>85％的氯化铷。达到了综合利用的目的。     

采用硫酸化焙烧 — 水浸工艺从锂云母精矿中提取锂

研究了采用硫酸化焙烧—水浸工艺从Li_2O品位3.23%的锂云母浮选精矿中回收锂,考察了焙烧过程中硫酸质量浓度、酸矿体积质量比、焙烧温度、焙烧时间,浸出过程中液固体积质量比、浸出温度、浸出时间对Li_2O浸出率的影响。结果表明:在硫酸质量浓度1 127 g/L、酸矿体积质量比1.5/1、焙烧温度150℃条件下焙烧12 h后,对焙烧渣在液固体积质量比3/1、室温下浸出40 min,Li_2O浸出率达98.39%,浸出效果较好。     

锂、铷和铯吸光光度分析进展

本文以锂、铷和铯的光度测定法为主,和其它分析方法相对比,总结了光度法测锂、铷和铯。对于设备不完全的试验室及目前国内尚未有专门论文介绍锂、铷和铯的吸光光度法来说有现实意义。该论文总结全面,数据可靠。     

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.