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1.
直接还原焙烧—弱磁选回收河南某金冶炼渣中铁   总被引:1,自引:0,他引:1  
王威  柳林  冯安生  刘红召  高照国 《金属矿山》2015,44(12):169-172
河南某黄金冶炼渣铁品位为27.24%,铁主要以赤铁矿的形式存在。为回收该渣中铁,采用直接还原焙烧—弱磁选工艺进行试验。结果表明:在还原剂焦煤加入量为15%、氧化钙加入量为5%、焙烧温度为1 150℃、焙烧时间为80 min、焙烧产品磨细至-0.045 mm占75%、弱磁选磁场强度为60 k A/m时,可以获得铁品位为91.4%、回收率为79.5%的铁精矿,实现了该黄金冶炼渣中铁的高效回收。  相似文献   

2.
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   

3.
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   

4.
还原焙烧-磁选回收氰化尾渣中铁的试验研究   总被引:5,自引:0,他引:5  
以褐煤为还原剂,采用还原焙烧-磁选的方法回收氰化尾渣中的铁,考查了褐煤添加量、焙烧温度、焙烧时间、磁场强度等工艺参数对铁品位及回收率的影响规律。结果表明,在褐煤添加量为18%,焙烧温度800℃,焙烧时间50 min,磁场强度0.24 T的条件下,精选后的铁精矿TFe品位可达到59%,铁回收率可达到80%。  相似文献   

5.
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   

6.
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   

7.
以某菱铁矿石为原料,采用直接还原—弱磁选工艺,研究了焙烧温度、还原时间、碳铁质量比对还原焙烧产品金属化率的影响,以及磨矿细度、磁场强度对弱磁选指标的影响。结果表明:在还原焙烧温度为1 050℃,还原时间为100 min,碳铁质量比为2.3的条件下,得到铁金属化率为90.88%的还原焙烧产品;还原焙烧产品在磨矿细度为-0.037 mm占79.60%,磁场强度为79.62 k A/m下,得到铁品位为92.40%,铁回收率为96.60%的还原铁粉,可直接作为炼钢原料。  相似文献   

8.
某黄金冶炼尾渣中铁回收试验   总被引:1,自引:0,他引:1  
对某黄金冶炼尾渣中铁的回收进行了试验,采用无烟煤为还原剂进行还原磁化焙烧,再进行2段磁选的方法回收得到铁精矿。考察了焙烧温度与时间、还原剂添加量以及2段磁选的磁场强度对试验的影响。试验结果表明:在焙烧温度为720℃、焙烧时间为50 min、还原剂添加量为14%、1段磁场强度为160 kA/m、2段磁场强度为140 kA/m的条件下,可以获得铁品位及铁回收率分别为65.27%和80.44%的高指标铁精矿。  相似文献   

9.
以甘肃地区镜铁矿粉矿为原料,采用磁化焙烧-弱磁选工艺,研究了焙烧温度、焙烧时间、还原剂用量、磨矿细度、磁场强度等对磁选效果的影响。结果表明,在煤粉用量2%、焙烧温度800℃、焙烧时间60 min条件下焙烧,再在磨矿细度-0.074 mm粒级占85.36%、磁场强度92.16 k A/m条件下磁选,可得到品位为54.95%、回收率为88.92%的弱磁选精矿。  相似文献   

10.
对某含铁品位46.72%的氯化挥发渣进行了直接还原焙烧-磁选回收铁的研究。还原剂烟煤用量、活性石灰用量、焙烧温度、焙烧时间和磨矿细度是影响铁回收的主要因素。在氯化挥发渣、烟煤和活性石灰质量比100∶25∶10、还原温度1150℃、焙烧时间55min、一段磨矿细度-0.074mm 85%、二段磨矿细度-0.043mm 90%最佳条件下,获得了产率43.59%、铁品位91.20%、硫含量0.05%、磷含量0.03%、铁回收率85.18%的还原铁。  相似文献   

11.
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   

12.
<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   

13.
<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   

14.
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   

15.
<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   

16.
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   

17.
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   

18.
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  相似文献   

19.
<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  相似文献   

20.
<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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