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某褐铁矿原矿铁品位39.28%,其中褐铁矿矿物含量占73.86%,具有一定的回收价值。以焦煤为还原剂,采用磁化焙烧-磁选的工艺回收其中的铁,试验主要考察了磁化焙烧温度、时间、还原剂加入量、磨矿细度、磁场强度对铁精矿选别指标的影响。确定最佳工艺条件为:磁化焙烧温度800℃,焦煤加入量4%,焙烧时间40 min,焙烧样磨矿至-0.037 mm 90%,磁场强度设置192 KA/m进行磁选,最终可获得磁选精矿铁品位59.76%、铁回收率73.31%的良好指标。 相似文献
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高磷鲕状赤铁矿直接还原同步脱磷研究 总被引:8,自引:7,他引:1
对含铁品位为43.58%、含磷0.83%的鄂西某宁乡式高磷鲕状赤铁矿进行了直接还原焙烧脱磷试验研究.研究了焙烧温度、还原剂用量、焙烧时间、脱磷剂用量对直接还原铁指标的影响.在还原剂用量17.5%,TS用量50%,NCP用量2.5%,焙烧时间60min,一段磨矿粒度为-0.074 mm粒级占89.56%,磁选磁场强度为87.58 kA/m;二段磨矿粒度为-0.025 mm粒级占100%,磁选磁场强度为87.58 kA/m时可得到铁品位91.58%,回收率84.%,磷品位0.049%的直接还原铁磁选精矿. 相似文献
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某铜冶炼渣浮选尾渣中含铁36.80%,铁主要铁橄榄石和磁铁矿的形式赋存,根据其矿石性质特点,以烟煤为还原剂,应用直接还原焙烧—磁选工艺回收铜尾渣中铁。试验结果表明:将铜尾渣与烟煤和作为助还原剂的CaO按100∶30∶20的质量比混合,在焙烧温度1 200℃,焙烧时间为60 min,磨矿细度为-0.045 mm含量占80%,磁场强度为127.32 kA/m的条件下,可获得铁品位为91.68%、铁回收率为82.24%的铁精矿。 相似文献
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验证了以高炉灰为还原剂时硫酸渣与高炉灰共还原-磁选回收铁工艺的可行性,考察了还原剂种类及用量、还原温度、还原时间、磨矿细度、磁场强度对还原铁指标的影响。结果表明,采用共还原-磁选工艺能够充分利用高炉灰中碳资源的还原性,实现硫酸渣与高炉灰中铁资源的回收,且不同种类高炉灰对共还原-磁选所得还原铁指标影响不同,以G4高炉灰为还原剂时还原铁中铁品位和铁回收率较好,在G4用量50%、还原温度1200 ℃、还原时间60 min、磨矿细度-74 μm粒级占47.93%、磁场强度0.10 T条件下可获得铁品位91.96%、铁回收率91.62%的直接还原铁,该工艺可为硫酸渣和高炉灰的综合利用提供参考。 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
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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,(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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《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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Ye Peipei 《中国稀土信息(英文版)》2014,(7)
<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new 相似文献
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《中国稀土信息(英文版)》2014,(11)
正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent 相似文献
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《中国稀土信息(英文版)》2014,(8)
正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of 相似文献
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《中国稀土信息(英文版)》2014,(7)
正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst, 相似文献
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针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。 相似文献