酸溶性钛渣制取钛白的实验室研究

鉴于酸溶性钛渣与钛精矿有较大差异,采用攀枝花钛精矿和云南钛精矿冶炼的酸溶性钛渣作为试验原料,通过实验室试验,初步确定了酸溶性钛渣的最佳酸解和水解工艺。试验结果证明,利用酸溶性钛渣制取钛白是完全可行的,相同条件下,水淬渣的酸解率高于未水淬渣。最佳水解工艺参数为：水解钛液TiO2主体浓度控制在200g／L以上;晶种加入量控制在1．3％-1．5％;水解钛液中Ti^3 应控制在1—3g／L。     

钛白酸解废渣中钛的浸出工艺研究

采用加碱高温焙烧对硫酸法钛白粉产生的酸解渣进行预处理,再使用硫酸进行浸出。通过正交试验和单因素试验考察了反应时间、液固比、搅拌转速、硫酸浓度和浸出温度对钛浸出率的影响。结果表明,影响钛浸出率大小的因素依次为反应时间、液固比、搅拌转速、硫酸浓度、浸出温度。在反应时间60min、液固比3、搅拌转速700r/min、硫酸浓度11.0mol/L、浸出温度95.0℃、酸解渣粒度-0.147mm的条件下,钛浸出率达到90.35%。     

酸溶性钛渣酸解性能研究

采用物相分析及成分分析等方法对酸溶性钛渣的酸解性能进行研究.结果表明,酸溶性钛渣的酸解性能受钛渣品位、金红石型TiO2含量、钛渣物相等因素的影响.其中,钛渣黑钛石物相的酸溶性能好坏直接影响钛渣的酸解性能,而Fe含量是影响黑钛石酸溶性好坏的主要因素;钛渣品位及钛渣中的金红石型TiO2也将对钛渣的酸解性能产生较大影响; FeO 和MgO对钛渣的酸解性能起促进作用,而CaO、SiO2和Al2O3则抑制钛渣的酸解.冶炼过程中控制钛渣F值(即TFe(当量)/TTi)在0.28以上,钛渣酸解率可达95%.     

酸溶性钛渣制取钛白工业试验

基于实验室所确定的酸溶性钛渣制取钛白的最佳工艺参数,在年产2000t的钛白生产线上进行了工业试验,钛渣酸解率达到92.56%,水解率大于95%,成品合格率为100%,一级品率为75%.从试验结果来看,工艺指标和产品指标达到了厂家要求,多数工序的生产能力较采用钛精矿有了较大的提高.据此,攀枝花钛精矿冶炼的酸溶性钛渣制取钛白的生产工艺已可实现产业化.     

低品位钛渣酸解反应试验研究

针对低品位钛渣酸解率低的问题,研究了低品位钛渣和74渣的物相组成、钛渣酸解温度曲线和化学反应标准生成热之间的差异,考察了反应酸浓度、引发温度、主反应时间、酸渣比对低品位钛渣酸解率的影响.结果表明:低品位钛渣酸解率低不是由难溶于硫酸的物相引起,而是与酸解反应速率有关;引发温度高引起酸解反应速率快、主反应时间短是低品位钛渣...     

从赤泥中提取钛的试验研究

采用浓硫酸分解法从赤泥盐酸浸出渣中提取钛,考察了酸解温度、酸解时间、浸出时间和水浸液固体积质量比对钛浸出率的影响,得到最佳浸出条件为:酸渣质量比1.4∶1,酸解温度300℃,酸解时间2.0h,浸出时间1.0～1.5h,水浸液固体积质量比10∶1。最佳条件下,钛浸出率达97%,浸出液中钛质量浓度为29.9g/L。     

电炉熔炼钛渣的物相组成及其与酸溶性的关系

电弧炉熔分金属化率大于９０％的球团，所得钛渣的ΣＴｉ２Ｏ３／ΣＴｉＯ２在０．３－．０５，其酸解率较高。这是因为渣中 更多的黑钛石ｍ「Ｍｇ，Ｆｅ，Ｍｎ）Ｏ．２ＴｉＯ２」．ｎ「（Ｔｉ，Ａｌ）３Ｏ，ＴｉＯ２」，而黑钛石易于被酸溶解。若钛渣中有ＭｇＴｉＯ２５型黑钛石，则可提高酸解率。     

冷却方式对钛渣成分及酸解性能的影响

采用干法粒化、水冷和空冷等方法研究了冷却方式对钛渣的成分、物相及酸解性能的影响。结果表明:不同冷却方式处理的钛渣中低价钛氧化物含量均有所降低,粒化渣中Ti_2O_3含量最低。冷却渣中主要物相是TiO_2和(Fe Mg)_xTi_yO_5,但粒化渣中TiO_2主要是金红石型,而水冷渣和空冷渣中TiO_2主要是锐钛型。冷却渣酸解率均低于现场渣,水冷渣与空冷渣酸解率分别为90.61%和92.46%;粒化渣酸解率仅74.72%,较现场渣酸解率相差近20%。     

攀钢钛渣连续酸解工业试验取得成功

<正>据攀钢集团消息,由攀钢集团攀枝花钢铁研究院和钛白粉厂共同开展的"钛渣连续酸解技术研究"项目工业试验于10月底完成,100%钛渣酸解率最高达到96%,创造了工业生产100%钛渣酸解率新纪录。     

酸解残渣回收矿的酸解性能研究

以酸解残渣中通过磁选获得的磁选回收矿为原料,使用化学分析、XRD、SEM、岩相分析等手段对比了磁选回收矿与常规钛精矿在化学成分、物相结构、钛元素赋存状态等方面的差异,在此基础上,进行了酸解对比试验。结果表明:磁选回收矿TiO_2品位约为38%,较钛精矿低约10%,其主要物相为钛铁矿约占65%,其次为石英和硅酸盐相,钛元素主要赋存于钛铁矿中约占87%。磁选回收矿粒度较小、表面有较多裂纹,单独酸解具有较好的酸解性能,但由于品位较低,其酸解钛液浓度偏低,不利于后期浓缩;磁选回收矿可与攀枝花PT20矿进行混合酸解,对酸解率无不良影响,添加比例在10%～15%时酸解率和过滤速度综合效果最佳,但是磁选回收矿和含镁较高的白马20矿混合酸解时,较高镁含量导致钛液比重增大,含硅絮凝物不易沉降,过滤速度慢。     

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)

正~~     

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)

正~~     

China's Major Non-ferrous Metals Imports & Exports

正~~