新型捕收剂DWD-3用于司家营 一期混磁精反浮选脱硅

铁矿选矿厂使用脂肪酸类阴离子捕收剂反浮选铁矿物,存在捕收剂用量大、所需浮选温度高、浮选指标差等问题。东北大学研发了一种新型酰胺基羧酸捕收剂DWD-3,并应用于司家营混磁精反浮选脱硅。实验室试验结果表明,在浮选温度为25 ℃,粗选矿浆pH=11.5、DWD-3用量为400 g/t、CaCl2用量为400 g/t、玉米淀粉用量为 1 000 g/t时,经1粗1精3扫闭路反浮选,能获得精矿铁品位66.48%、回收率80.32%,尾矿铁品位16.35%的指标。以捕收剂DWD-3代替现场捕收剂GK-68可使浮选温度由40 ℃降至25 ℃,并且精矿铁品位提高了0.39个百分点、回收率提高了2.23个百分点,尾矿铁品位降低了1.57个百分点。对浮选产品分析表明,精矿中存在20 μm以下的紧密连生体;尾矿中有大量较大颗粒连生体,且连生体中铁矿物与脉石部分相互浸染连生,是尾矿铁品位较高的原因。     

新型抑制剂DLW-4用于鞍千公司混磁精反浮选

为检验东北大学自主合成的新型抑制剂DLW-4的性能及效果,对鞍钢集团鞍千矿业公司磁选混合精矿（MMC）进行了反浮选条件试验及1粗1精3扫、中矿顺序返回的反浮选闭路试验。结果表明,在浮选温度为40 ℃、粗选NaOH用量为800 g/t、抑制剂DLW-4为342 g/t、活化剂CaCl₂为600 g/t、捕收剂RA-715为480 g/t时选别指标最佳。对铁品位为47.74%的磁选混合精矿经1粗1精3扫闭路试验,获得了铁品位为68.08%、回收率为88.20%的铁精矿。与常规淀粉抑制剂相比,DLW-4可以以更少的药剂用量获得更好的反浮选指标,具有推广价值。     

HYIC捕收剂强化鞍千混合磁选精矿反浮选效果试验

鞍千选矿厂为了优化选别工艺中的反浮选效果,取浮选入选的混合磁选精矿进行浮选试验,进行了抑制剂、活化剂、捕收剂用量及常规捕收剂TD-Ⅱ与新型捕收剂HYIC浮选效果对比试验。试验结果表明：固定矿浆pH值为11.5、抑制剂淀粉用量1 200 g/t、活化剂CaO用量500 g/t、粗选捕收剂用量800 g/t、精选捕收剂用量300 g/t,采用常规捕收剂TD-Ⅱ时,闭路试验获得了精矿铁品位68.20%、铁回收率88.73%的选别指标;采用新型捕收剂HYIC时,闭路试验获得了精矿铁品位68.25%、铁回收率90.04%的选别指标;使用捕收剂HYIC比采用捕收剂TD-Ⅱ所获得的浮选精矿产率、铁品位、铁回收率分别高0.91,0.05,1.31个百分点,捕收剂HYIC可以强化反浮选效果,提高选厂的经济效益。     

胺取代脂肪酸捕收剂对齐大山铁矿石浮选试验研究

本文探索性地在脂肪酸α位碳原子位置上引入极性胺基基团,研究开发出一种新型铁矿浮选药剂DMP-3,并以此为捕收剂对鞍钢集团齐大山选矿厂混合磁选精矿进行了反浮选试验研究。在浮选温度30℃,矿浆pH值11.50,淀粉用量600g/t,捕收剂DMP-3用量600g/t,采用一次粗选、一次精选的闭路浮选试验流程,获得精矿铁品位65.84%,回收率89.85%,尾矿品位10.32%的指标。试验结果表明,新型胺代改性脂肪酸捕收剂DMP-3具有无需活化,药剂用量少,低温活性好的特点。     

钼尾矿综合回收硫铁试验研究

对河南某钼尾矿矿石性质进行研究,发现具有回收黄铁矿和磁铁矿的价值。在活化剂硫酸、捕收剂异丁基黄药、起泡剂2号油用量分别为200g/t、50g/t、35g/t的浮选药剂制度下,钼尾矿采用一粗一精一扫浮选闭路流程,可获得硫精矿品位41.21%,回收率87.68%的选别指标。选硫尾矿再通过一段磁选-再磨-二段磁选的工艺流程,获得铁精矿品位62.72%,全铁回收率41.86%的选别指标。     

辽宁某铁矿低温捕收剂浮选工艺试验研究

辽宁某铁矿石选矿厂的弱磁—强磁混合磁选精矿的TFe品位为53.92%,主要铁矿物以磁/赤铁矿的形式存在,主要脉石矿物为石英。该选矿厂现场采用TD-Ⅱ捕收剂进行反浮选,但浮选矿浆温度为40℃,导致资源浪费,为提高生产指标,使用东北大学自主研发的新型含多极性基低温捕收剂DZ对该选厂的混合磁选精矿进行反浮选试验研究。试验考察了捕收剂DZ用量、矿浆pH值、浮选温度、淀粉用量、CaO用量对混合磁选精矿的浮选行为的影响。针对TFe品位为53.92%的混合磁选精矿,采用新型低温捕收剂DZ在浮选温度15±2 ℃、矿浆pH值9、抑制剂淀粉用量700 g/t、捕收剂DZ用量150 g/t,不添加活化剂的条件下,经过“一粗二精三扫”的浮选闭路试验,可得到TFe品位65.24%、铁回收率93.03%的浮选精矿指标。采用捕收剂TD-Ⅱ在浮选温度40±2 ℃、矿浆pH值11,淀粉用量1000 g/t,CaO用量900 g/t,捕收剂TD-Ⅱ用量250 g/t的条件下,经过“一粗一精三扫”的浮选闭路试验,可得到TFe品位65.47%、铁回收率90.71%的浮选精矿指标。对新型低温捕收剂DZ以及现场药剂TD-Ⅱ体系所得浮选闭路的精矿进行产品检查,通过浮选结果与产品检查对比可发现,新型低温捕收剂DZ是一种高效、选择性高的低温浮选捕收剂,能有效解决选矿厂在反浮选过程中的能源浪费问题,节约选矿成本,提高资源利用效率。     

新型低温捕收剂DGT-P对齐大山铁矿石的反浮选应用研究

在实验室自主研发的新型组合型捕收剂DGT-P体系下，针对齐大山铁矿选矿分厂的混合磁选精矿进行了浮选实验研究，确定了较佳的药剂制度，并考查了浮选效率。在矿浆温度20℃、pH值=10.0、捕收剂DGT-P用量800 g/t、抑制剂玉米淀粉用量1200 g/t、不添加活化剂的条件下，经过“一粗一精一扫”的浮选闭路实验，针对铁品位为48.22%的浮选给矿，可获得精矿铁品位69.23%及铁回收率91.52%的良好浮选指标。本研究表明新型低温捕收剂DGT-P是一种高效、选择性高的低温浮选捕收剂，该药剂的推广与应用将会有效解决我国铁矿阴离子反浮选过程中能源浪费问题。     

新型阴离子捕收剂DZN-1对齐大山选厂混磁精的反浮选试验研究

采用东北大学新合成的阴离子捕收剂DZN-1,对鞍钢齐大山选矿厂混磁精矿进行了浮选条件试验,确定的适宜的粗选作业条件为:浮选温度为25℃,矿浆pH值为11.5,捕收剂DZN-1用量800g/t,活化剂CaCl2用量200g/t,抑制剂羧甲基淀粉用量600g/t;在适宜的工艺技术条件下,采用一粗一扫、中矿返回的闭路流程处理铁品位为46.02%的混磁精矿,获得了铁品位为65.38%,精矿回收率为89.56%的精矿。试验结果表明,新型捕收剂DZN-1的特点是活化剂用量少且在较低温度下具有较好的选择性。     

研山铁矿综合尾矿再选试验及生产实践

研山铁矿综合尾矿铁品位为9.14%，磁性铁分布率为20.13%、赤褐铁分布率为55.91%，铁矿物主要富集在微细粒级，其次是粗粒级。为充分利用选矿厂闲置的原反浮选尾矿选铁系统回收综合尾矿中的铁矿物，进行了选矿试验。结果表明，试样经强磁选预富集—磨矿—弱磁选—1粗1精1扫反浮选流程处理，在高梯度强磁选背景磁感应强度为0.72 T，磨矿细度为-74 μm占90%，弱磁选磁场强度为238 kA/m，反浮选粗选pH调整剂NaOH用量为1 300 g/t（pH=11.5）、抑制剂苛化淀粉用量为840 g/t、活化剂CaO用量为687.5 g/t、捕收剂GK68用量为1 800 g/t，精选GK68用量为900 g/t情况下，可获得铁品位为69.84%、回收率为4.13%的优质铁精矿。改造后的生产实践表明，采用盘式磁选回收机预富集—一段闭路磨矿—浓缩磁选—二段闭路磨矿—弱磁选抛尾—1粗1精3扫闭路反浮选流程处理选矿厂综合尾矿，每年可产出铁品位超过69%的铁精粉约5.5万t，可为企业增加利润1 750万元/a。     

研山铁矿综合尾矿再选试验及生产实践

研山铁矿综合尾矿铁品位为9.14%，磁性铁分布率为20.13%、赤褐铁分布率为55.91%，铁矿物主要富集在微细粒级，其次是粗粒级。为充分利用选矿厂闲置的原反浮选尾矿选铁系统回收综合尾矿中的铁矿物，进行了选矿试验。结果表明，试样经强磁选预富集-磨矿-弱磁选-1粗1精1扫反浮选流程处理，在高梯度强磁选背景磁感应强度为0.72 T，磨矿细度为-74 μm占90%，弱磁选磁场强度为238 kA/m，反浮选粗选pH调整剂NaOH用量为1 300 g/t（pH=11.5）、抑制剂苛化淀粉用量为840 g/t、活化剂CaO用量为687.5 g/t、捕收剂GK68用量为1 800 g/t，精选GK68用量为900 g/t情况下，可获得铁品位为69.84%、回收率为4.13%的优质铁精矿。改造后的生产实践表明，采用盘式磁选回收机预富集-一段闭路磨矿-浓缩磁选-二段闭路磨矿-弱磁选抛尾-1粗1精3扫闭路反浮选流程处理选矿厂综合尾矿，每年可产出铁品位超过69%的铁精粉约5.5万t，可为企业增加利润1 750万元/a。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586