低品位复杂难选白钨矿选矿工艺研究

湖南某矽卡岩型白钨矿,含0.23%WO3、24.48%CaCO3、11.10%CaF2,矿石中钨与钼类质同象替代较为普遍,且含有大量富钙脉石矿物。为了有效回收其中的白钨矿,本文采用常温粗选-加温精选-酸浸的选矿工艺处理该矿石,其中在白钨浮选的常温粗选段,采用了以水玻璃为主的组合抑制剂及新型高效捕收剂TB,同时在精选作业中添加HDZ药剂抑制含钙脉石矿物;在白钨浮选的精选段,采用改进型的"彼得洛夫法",取得了品位64.21%WO3、回收率77.70%的白钨浮选精矿,对白钨浮选精矿进行酸浸,最终得到白钨精矿品位68.29%WO3、回收率75.85%的试验指标,实现了钨矿物与高钙脉石矿物的有效分离。     

石灰法常温浮选低品位白钨矿的工艺研究

柿竹园低品位白钨矿原矿WO3品位为0.39%,采用石灰法常温浮选分离,经粗选闭路试验获得了WO3品位为3.53%,回收率77.01%的白钨粗精矿。精选开路试验,通过添加酸化水玻璃,获得了最终浮选精矿WO3品位为42.12%,回收率46.26%的良好指标。精矿产品XRD图谱分析表明,萤石和方解石在石灰法粗选段和精选段分别得到了强烈的抑制作用,白钨矿与含钙脉石矿物可实现有效分离,研究结果表明,石灰法是实现白钨常温浮选的一条有效途径。     

国外某白钨矿选矿试验研究

针对国外某白钨矿矿石中含有大量磁铁矿及少量硫化矿的矿石性质,采用"磁选除铁-白钨粗选-白钨加温精选"的选别流程回收白钨矿.试验无预脱硫作业,白钨粗选段采用Na2CO3+改性Na2Si O3为调整剂以及GYWA为捕收剂,加温精选作业采用改进的"彼得洛夫法",以Na2Si O3和NS为抑制剂,强化对脉石的抑制及对白钨矿的捕收,实现了白钨矿的充分回收.在原矿WO3品位为0.47%的条件下,获得WO3品位66.69%、回收率88.86%的白钨精矿.钨精矿中S品位为0.025%,符合钨精矿的质量标准.     

江西某低品位钨矿石浮选试验

江西某低品位白钨矿石WO3含量为0.20%,矿物组成较复杂,金属矿物主要有白钨矿、磁黄铁矿等,非金属矿物主要有萤石、石英、透闪石、滑石、金云母、黑云母、白云母、石榴石、长石、绢云母、方解石等,含钙脉石矿物含量较高,矿石中白钨矿与脉石矿物共生关系紧密。为确定白钨矿的高效选矿工艺,进行了选矿试验研究。结果表明,矿石在磨矿细度为-0.074 mm占65%的情况下1次浮选脱硫,然后以碳酸钠为矿浆p H调整剂、水玻璃+栲胶为脉石矿物组合抑制剂、731为白钨矿浮选捕收剂,经1粗2精1扫浮选预富集钨、预富集精矿水玻璃强化调浆后1粗2精1扫常温浮选选钨、常温钨精矿90℃下水玻璃强化调浆后1粗5精1扫加温浮选选钨,最终获得WO3品位50.23%、WO3回收率为70.32%的白钨精矿,实现了白钨矿的高效回收。     

黑白钨细泥选矿新工艺的研究

江西某矿钨细泥(70%-30 μm)的WO3在白钨矿、黑钨矿和钨华中的分布率分别为45.30%, 53.01%,1.69%.采用Na2CO3、改性Na2SiO3和Pb(NO3)2作调整剂,TA-4作捕收剂对黑白钨矿进行粗选,然后加温精选分离,其泡沫经酸浸获得白钨精矿,加温精选尾矿经摇床选别获得黑钨精矿.试验结果表明,Na2CO3 的合理添加直接影响黑白钨混合浮选的选别效果;采用新型选钨捕收剂TA-4是提高钨选别指标的关键,精选中加入NTA有利于白钨矿与黑钨矿的分离.当钨细泥给矿品位(WO3)为0.2%时,获得品位59.55%、回收率47.21%的白钨精矿,品位36.62%、回收率19.53%的黑钨精矿,钨精矿的平均品位为50.60%、总回收率为66.74%.     

新型捕收剂R31浮选低品位白钨矿的研究

用R31为捕收剂、Na2CO3为调整剂、Na2SiO3为抑制剂进行白钨粗选,白钨精选采用Na2SiO3加温浮选的工艺,在原矿含WO30.28%的小型试验中,获得白钨精矿品位73.10%,回收率81.67%,试验表明,R31是白钨矿较为合适的捕收剂。     

某难选白钨矿预选工艺研究

某白钨矿钨品位仅0.38%,矿物组成复杂,嵌布粒度细,矿石中含多种硫化矿、多种大量含钙脉石,为难选白钨矿。试验针对矿石工艺矿物学特点,进行了全浮选、高梯度磁选-浮选、重选-浮选3种粗选预选工艺研究。结果表明,高梯度磁选-浮选工艺获得的钨粗精矿钨品位最高,为6.16%,钨回收率达到85.27%,该工艺相比其他两种工艺,工艺简单,处理量大,药剂用量少,成本低,是适宜开发此类矿物的预选工艺。高梯度磁选-浮选预选工艺获得的白钨粗精矿经简单加温精选可获得WO3品位66.28%、WO3回收率77.87%的白钨精矿产品,实现了此类白钨矿的合理利用。     

广东某白钨矿回收工艺的研究

广东某钨矿的主要有价矿物为白钨矿和黑钨矿.当原矿品位WO3为0.593％时,以水玻璃和Na2CO3为调整剂,ZL为捕收剂浮钨,可获得品位WO311％以上的钨粗精矿.以水玻璃为调整剂,ZL为捕收剂,对钨粗精矿进行加温精选,可获得品位WO365.97％、回收率81.98％的白钨精矿.     

广东某白钨矿选矿的试验研究

广东某钨矿的主要钨矿物为白钨矿,采用常温粗选—加温精选的浮选工艺回收钨矿物。当原矿品位WO3为0.593%时,以碳酸钠为调整剂,水玻璃为抑制剂,ZL为捕收剂,浮选闭路试验可获得品位WO365.97%、回收率81.98%的白钨精矿。     

湖南某白钨矿浮选试验研究

对湖南某白钨矿开展了选矿试验研究, 通过强化调浆-疏水聚团工艺, 调整白钨矿表观粒径, 可获得品位10.44%、回收率86.72%的白钨粗精矿。相比常规浮选, 白钨粗选段选矿回收率提高了2.09个百分点; 微细粒级(-10 μm)白钨矿回收率由64.74%提高至75.88%。     

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