高压辊磨对铁精矿球团质量的影响

研究了高压辊磨对铁精矿性质、球团质量及造球工艺参数的影响。研究表明:高压辊磨能细化铁精矿粒度,提高铁精矿比表面积,改善其成球性能,提高球团质量,并且能降低膨润土用量,缩短造球时间,提高生球适宜水分。本研究为工业试验及生产调整提供了参考。     

润磨对程潮铁矿成球过程影响的研究

以程潮铁矿为原料进行试验,考察了润磨时间和水分对原料性质和生球质量的影响,以及润磨工艺对膨润土配比和造球时间的影响。试验表明,润磨能细化混合料粒度,提高混合料比表面积,提高生球质量,降低膨润土用量,缩短造球时间。     

程潮铁矿选矿厂尾矿再选生产实践

程潮铁矿尾矿再选采用JHC型矩环式永磁磁选机和现有细筛闭路磨矿系统形成尾矿再选生产流程，生产实践表明，造厂尾矿经过再选后尾矿平均品位降低1．278％，作业金属理论回收率为20．30％，可生产出合格铁精矿产品．使得矿山资源得到合理开发和保护，并获得了显著的经济效益和社会效益．     

巴西赤铁精矿成球性能试验

为确定铁品位为67.45%、SiO₂含量为2.54%、-0.045 mm占95.72%、比表面积为1 647.00 cm²/g的巴西Carajas赤铁精矿造球的合适工艺技术参数,以铁品位为14.38%、SiO₂含量为67.22%、-0.045 mm占87.27%、比表面积为1 698.85 cm²/g的山西某赤铁矿强磁选尾矿为调硅剂,以吸水率为436.01%、蒙脱石含量为62.22%、-0.074 mm占99.4%的某膨润土为黏结剂,以生球落下强度、抗压强度、爆裂温度为评价指标,研究了生球原料的成分和性质、造球工艺参数对生球性能的影响。试验确定的赤铁精矿（含所加铁尾矿）的比表面积为1 768 cm²/g,膨润土的质量分数为0.8%,尾矿与精矿的质量比为2.2%,赤铁精矿水分为8.0%,造球过程中生球的水分为10.0%,造球时间为12 min,造球盘的转速为22 r/min,对应的生球落下强度为6.8次,抗压强度为14.15 N,爆裂温度为427 ℃。     

邯郸人工钠化膨润土造球性能研究

作者对邯郸膨润土进行了挤压钠化处理，与安阳、长治产铁精矿粉配料进行球团矿试验，确定了人工钠化膨润土最佳加入量为３％，所获成品球的强度满足生产要求。     

武钢程潮铁矿磁选精矿提纯研究

对程潮铁矿的最终磁选精矿采用再磨—弱磁—反浮选工艺提纯，获得产率为７３．０６％、含ＴＦｅ７０．５２％、ＳｉＯ２０．３７％的超纯铁精矿，可作为生产金属铁粉或磁性材料的原料。     

磁化焙烧-磁选综合回收回转窑除尘灰中铁的试验研究

采用焙烧-磁选方法对新疆克州建宝选矿厂回转窑窑尾除尘灰进行了回收铁的试验研究。考察了焙烧温度、焙烧时间、磨矿粒度、磁场强度等因素对选铁效果的影响,并比较了直接焙烧和造球焙烧效果的差异。结果表明,除尘灰经720℃/30 min、760℃/30 min或800℃/20 min焙烧,在磁场强度为0.18 T条件下进行分选,获得的铁精矿品位57%以上,精矿铁回收率90%左右,铁精矿中杂质含量S、P低,符合铁精矿要求。除尘灰直接焙烧或造球焙烧后磁选所得铁精矿品位和回收率差异不大,考虑动态回转窑处理该矿,在粉矿中添加一定量的膨润土较大地提高了造球强度,在不影响指标的情况下,可满足回转窑的生产要求。     

链篦机-回转窑铁矿氧化球团干燥预热工艺参数研究

利用程潮铁矿自产磁铁精矿,在膨润土添加量为1.0%~1.2%时,润磨后造球。通过模拟链篦机装置试验,研究了链篦机-回转窑氧化球团生产工艺中链篦机料层高度、鼓风干燥热风温度、抽风干燥热风温度、预热热风温度及风速(工况)等预热工艺参数。在此干燥预热工艺条件下,链篦机干球经回转窑焙烧固结后,球团矿抗压强度2828N/个,转鼓指数(+6.3mm)93%,耐磨指数(-0.5mm)3.53%,FeO<1%,成品球质量达到了优质球团质量的要求。     

提高大冶铁精矿球团质量的试验研究

通过球团试验,得出用大冶铁精矿生产高质量球团矿的措施。试验结果表明：在大冶铁精矿-0.074 mm粒级含量为93.35%、粘结剂临安膨润土用量为2%、水分为8.0%条件下,通过严格控制造球时间、给料与给水速度和给料与给水方式等,可获得优质球团矿,其生球0.5 m落下强度＞3.8次,抗压强度12.0 N/个,爆裂温度＞450 ℃,成品球抗压强度＞2.5 kN/个。     

建平膨润土提纯及制备球团黏结剂实验研究

以建平镁基膨润土为原矿,采用多级小锥角旋流器串联工艺进行提纯,并对提纯产品进行氧化球团造球实验。结果表明,当采用φ150 mm、φ75 mm、φ50 mm、φ25 mm、φ10 mm五级旋流器串联时,蒙脱石含量从62.32%富集到94.06%。选用φ50 mm-Y做黏结剂,配入量为1.5%时,球团落下强度为4.3次,爆裂温度为584℃,干球抗压强度为363 N,各项指标均达到市售钠化膨润土的性能。     

Market and recycling of NiMH battery

<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     

China rare earth market review

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     

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     

2014 second batch of rare earth quota released

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