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。     

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。     

齐大山选矿分厂磁选精矿剪切絮凝正浮选研究

针对齐大山铁矿选矿分厂反浮选工艺不能有效回收微细粒铁矿物,导致尾矿品位较高的现象,在实验室以石油磺酸钠作为捕收剂和絮凝剂,进行了齐大山铁矿选矿分厂磁选精矿剪切絮凝正浮选研究。结果表明：使磁选精矿发生剪切絮凝的适宜条件为磨矿细度-0.037 mm占85%,矿浆pH=3,石油磺酸钠用量5 kg/t,水玻璃用量300 g/t,搅拌强度2 200 r/min,剪切絮凝时间6 min。在此条件下将磁选精矿剪切絮凝后进行1粗3精1扫闭路浮选,获得了精矿铁品位为66.80%,回收率为95.93%,尾矿铁品位仅5.03%的较好指标。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

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