膜法处理硫酸法钛工艺中废酸的研究

在硫酸法钛白工艺中,每生产1t钛白,要副产硫酸浓度约为20％的废酸7t-11t,其回收利用技术的开发是解决该工艺环保问题的关键。本文报告了以真空膜蒸馏为核心,膜法处理钛白废酸的实验室研究结果,配置料液的研究结果表明,用膜蒸馏把纯硫酸浓缩到65％是可行的,但废酸中FeSO4的结晶易破坏膜的疏水性,不利于膜蒸馏过程的顺利进行,本研究探索了两种不同的废酸实际料液的处理工艺,（1）一级膜蒸馏浓缩→冷却结晶FeSO4.7H2O→扩散渗析除铁→二级膜蒸馏浓缩;（2）三异辛胺－仲锌醇－煤油体系萃取硫酸→膜蒸馏浓缩,研究表明,两种工艺均可将废酸浓缩到65％以上,能返回主流程使用。     

膜法处理硫酸法钛白工艺中废酸的研究

在硫酸法钛白工艺中,每生产1 t钛白,要副产硫酸浓度约为20%的废酸7 t～11t,其回收利用技术的开发是解决该工艺环保问题的关键.本文报告了以真空膜蒸馏为核心,膜法处理钛白废酸的实验室研究结果.配置料液的研究结果表明,用膜蒸馏把纯硫酸浓缩到65%是可行的,但废酸中FeSO4的结晶易破坏膜的疏水性,不利于膜蒸馏过程的顺利进行.本研究探索了两种不同的废酸实际料液的处理工艺:(1)一级膜蒸馏浓缩→冷却结晶FeSO4@7H2O→扩散渗析除铁→二级膜蒸馏浓缩;(2)三异辛胺-仲锌醇-煤油体系萃取硫酸→膜蒸馏浓缩.研究表明,两种工艺均可将废酸浓缩到65%以上,能返回主流程使用.     

硫酸法钛白废酸循环利用分析计算

以钛白废酸循环利用为主线,分析了硫酸在硫酸法钛白生产中的物料平衡情况,计算了不同浓度硫酸代替稀释水稀释酸解反应物释放的热量对反应体系温度的影响,分析计算了50％稀硫酸100％返回硫酸法钛白循环利用的条件.结果表明:在无外热供给的条件下,要实现浓缩废酸100％循环利用,钛铁矿酸解用废酸最高浓度为50％,反应酸浓度小于等于81％.     

钛白废酸喷雾浓缩装置的研发

针对传统钛白废酸回收工艺存在的不足,提出了采用喷雾浓缩技术处理钛白废酸.通过实验室模拟试验并借鉴喷雾干燥技术,设计并研制了钛白废酸喷雾浓缩装置.该装置对钛白废酸的浓缩质量分数可达80%以上.通过条件试验,确定了喷雾浓缩装置的最佳工艺参数.     

喷雾浓缩钛白废酸半工业试验

在探索试验基础上进行了喷雾浓缩钛白废酸半工业试验。考察了新研制的喷雾浓缩废酸装置的稳定性、耐腐蚀性、经济性及酸回收率,确定了浓缩废酸最优工艺参数。结果表明,用新研制的喷雾浓缩装置处理钛白废酸具有较好的产业化前景。     

钒钛专利

正专利名称:一种钛白废酸综合利用的方法专利申请号:201510939896.4专利公开号:CN106882839A申请日:2015-12-15公开日:2017-06-23申请人:北京矿冶研究总院本发明公开了一种钛白废酸综合利用的方法,涉及钛白废酸综合回收利用及非高炉钛渣直接生产硫酸法钛白的方法,属于钛白非酸处理技术领域。本发明用钒钛磁铁矿直接还原钛渣作原料作为钛水解沉淀的中和剂和捕收剂,通过氧化水解将钛白废酸中的钛沉淀富集到优化钛渣中,同时将钛渣中的钒、钪等稀有金属浸出进入溶液,得到含钒钪等稀有元素的贫     

用锌焙砂治理钛白生产中的废酸

<正> (一)钛白废酸组成用硫酸法生产钛白粉,无论产品是低档的搪瓷钛白,还是高档的金红石型钛白;也无论钛液的水解是用高压水解还是常压水解,都要产生废酸。废酸中除游离硫酸外,还含有相当数量的硫酸亚铁、硫酸钛盐及其它可溶性硫酸盐杂质。其主要组成是(克/升):H_2SO_4448.2、Fe30.79、TiO_233.98、Mn3.77。     

国内外钛白废酸综合治理及回收利用研究现状

采用硫酸法生产钛白,每生产1 t钛白约产生质量分数20%左右的废酸6~8 t。为了解决废酸污染及回收利用问题,国内外科技工作者开发了多种治理工艺,如中和,废酸再生,废酸浓缩等。分析各工艺的优缺点,对开展新的废酸治理工艺研究有一定借鉴和指导意义。     

斜管沉降槽回收浓废酸中的偏钛酸

钛白生产水解后浓废酸经过吸滤，滤液含１．３～１８．７ｇ／ＬＴｉＯ２的偏钛酸，它的回收可降低产品原料单耗３～４％，提高废酸质量，有益于废酸综合利用，减少产品单耗。本文以工厂实例介绍了料管沉降槽回收偏钛酸的装置设计与应用。     

钛白废酸与赤泥联合提取氧化钪的工艺研究

以钛白废酸、赤泥为原料,经过浸出、一次萃取反萃、酸溶水解、二次萃取、酸洗、二次反萃、草酸沉淀、精制等提纯工序,可得到纯度99.99%的Sc2O3。赤泥和钛白废酸中钪的回收率分别达到57.8%和93.3%。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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