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《有色金属工程》2021,(5)
为研究微波焙烧辉钼矿的可行性及氧化焙烧机理,选取品位为64.68%的高品位辉钼矿进行介电特性、微波焙烧工艺以及物相演变规律研究。采用谐振腔微扰法分析辉钼矿介电特性;采用XRF、XRD及SEM等分析手段分别对样品的成分、物相、微观形貌等进行表征。结果表明,辉钼矿为强吸波物质,焙烧过程中微波选择性地优先加热MoS_2和FeS;最佳工艺条件为焙烧温度550℃、保温时间120min、物料厚度4mm;在最佳工艺条件下,焙烧产物中Mo的含量达到84.25%,产物物相为MoO_3,焙烧过程中,物相变化遵循MoS_2→MoO_2→MoO_3的规律。该研究可为辉钼矿氧化焙烧提供新思路。 相似文献
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硬锌渣是锗提取的重要原料之一。目前,回收硬锌中的锗普遍采用的工艺为“中浸-氧化焙烧-氯化蒸馏”的工艺流程回收。企业中多采用焦炭来提供热源,对物料进行焙烧处理,存在能源消耗大、劳动强度大、环境污染大等缺点。本文以真空炉渣经中性浸出后的含锗硬锌渣为原料进行了微波氧化焙烧实验研究。通过研究获得本实验条件下最优微波焙烧温度为500℃,焙烧时间2.5h,以及相同坩埚下最优物料量为200g,所得到最佳浸出率为86.82%;微波显著缩短了氧化焙烧时间、降低了焙烧温度,改善了焙烧条件,实现了清洁、节能高效的氧化焙烧。 相似文献
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为研究微波焙烧辉钼矿可行性及氧化焙烧机理,选取品位为64.68%的高品位辉钼矿进行介电特性、微波焙烧工艺以及物相演变规律研究。采用谐振腔微扰法分析辉钼矿介电特性;采用XRF、XRD及SEM对样品的成分、形貌、物相等进行表征。结果表明:辉钼矿为强吸波物质,焙烧过程中微波选择性的优先加热MoS2和FeS;最佳工艺条件为焙烧温度550 °C,保温时间120 min,物料厚度<4 mm,焙烧产物中Mo的含量达到84.25%;在最佳工艺条件下,产物物相为MoO3,焙烧过程中物相变化遵循MoS2→MoO2→MoO3的规律。本研究为辉钼矿氧化焙烧提供新思路。 相似文献
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提出了微波碱性焙烧—水溶含锗氧化锌烟尘的新工艺,研究了配碱比、熟化时间、微波焙烧温度、液固比、水溶温度等对锗浸出率的影响规律。结果表明:在配碱比1 g·g-1、熟化时间5 d、微波焙烧温度400 ℃、保温时间10 min、液固比5 mL/g和水溶温度70 ℃时,锗的最佳浸出率为91.15%,与现有的常规碱性焙烧含锗氧化锌烟尘工艺对比可知,碱性焙烧温度从950~1 100 ℃降低至400 ℃,碱性焙烧保温时间由1~4 h降低至10 min,锗浸出率由80.35%提高至91.15%。 相似文献
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<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 相似文献
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《中国稀土信息(英文版)》2014,(6)
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 相似文献
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YANG Li 《中国稀土信息(英文版)》2014,(6)
<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 相似文献
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Gao Wei 《中国稀土信息(英文版)》2014,(11)
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 相似文献
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《中国稀土信息(英文版)》2014,(8)
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 相似文献
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《中国稀土信息(英文版)》2014,(12)
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. 相似文献
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《中国稀土信息(英文版)》2014,(8)
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. 相似文献
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<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 相似文献
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《中国稀土信息(英文版)》2014,(10)
<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 相似文献
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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. 相似文献