从废弃冶金沉泥中回收碳试验

针对废弃冶金沉泥中含有大量可回收利用的碳,在对其进行化学性质分析的基础上,采用浮选法有效回收其中的碳。通过浮选单因素条件试验,对矿浆浓度、捕收剂种类及用量、起泡剂和抑制剂用量、分散剂种类及用量进行了探索研究。在最佳试验条件:矿浆浓度为5%、捕收剂柴油用量为5 000 g/t、起泡剂2~#油用量为80 g/t,分散剂六偏磷酸钠用量为80 g/t,抑制剂苛性淀粉用量为120 g/t的条件下,得到了碳品位为65.08%,碳回收率为61.89%的碳精矿。试验结果表明,利用浮选法回收冶金沉泥中的碳是可行的。     

萤石矿浮选的正交试验研究

采用正交试验法对硅质萤石矿进行了浮选试验研究。研究了碳酸钠、水玻璃、捕收剂用量对萤石粗精矿品位、回收率、浮选粗选作业选矿效率的影响,从而确定萤石浮选的最佳工艺参数及影响萤石粗精矿品位、回收率、浮选粗选作业选矿效率的主要因素。结果表明,当碳酸钠用量为1500 g/t、水玻璃用量为500 g/t、捕收剂用量为480 g/t时,浮选后的萤石粗精矿品位为80.68%,回收率为92.11%。     

利用浮选柱从瓦斯泥中回收碳的试验研究

在对瓦斯泥性质研究的基础上,利用微泡浮选柱进行了从瓦斯泥中回收碳的试验研究,分析了捕收剂用量、起泡剂用量、分散剂用量、充气量、淋洗水量、精选次数等对浮选指标的影响。试验研究结果表明,瓦斯泥在柴油用量为500g/t、2#油用量为25g/t、六偏磷酸钠用量为80g/t、充气量为0.32m3/h、淋洗水量为0.015 m3/h的条件下利用浮选柱进行浮选试验,经一次粗选三次精选工艺流程最终得到产率为24.75%、品位为74.21%、回收率为62.94%的碳精矿。     

高炉瓦斯泥浮选碳工艺试验研究

河北某钢厂高炉瓦斯泥碳原矿品位为25.56%,碳含量较高,是很好的选碳原料,具有很高的利用价值。对高炉瓦斯泥中的碳进行浮选回收不仅可以提高资源利用效率,减少资源浪费,又可以很好的保护环境。本文在分析高炉瓦斯泥原料性质的基础上,通过单一浮选条件试验,考察了不同的矿浆浓度,抑制剂用量,捕收剂用量,起泡剂用量对浮选最终效果的影响,找到了合适的高炉瓦斯泥碳浮选回收工艺。试验结果表明:在矿浆浓度为5%,六偏磷酸钠用量为80 g/t,苛性淀粉用量为80 g/t,捕收剂柴油用量为900 g/t,起泡剂2#油用量为50g/t的条件下经过一次粗选三次精选的开路浮选工艺流程,最终获得了产率为25.79%,品位为69.85%,回收率为70.31%的碳精矿,取得了较好的选别指标,为此类矿物的选别提供宝贵经验。     

钢厂粉煤灰中回收碳和铁的试验研究

采用先浮选后磁选的方法从粉煤灰中回收碳和铁, 结果表明, 当磨矿细度为-74 μm粒级占99%, 捕收剂煤油用量300 g/t, 抑制剂碳酸钠用量100 g/t, 起泡剂松醇油用量100 g/t, 磁场强度300 mT时, 可得到品位71.45%、回收率92.50%的碳精矿和品位62.39%、回收率82.42%的铁精矿。     

伊春辉钼矿浮选工艺优化试验研究

针对伊春低品位辉钼矿,采用浮选工艺获得高品位钼精矿。采用单因素试验方法,重点考察了药剂制度(p H值、混合抑制剂用量、捕收剂用量、起泡剂用量)及物理因素(磨矿粒度、温度、浮选转速、充气量、刮泡时间)对浮选指标的综合影响。单因素试验结果表明,当矿浆浓度为45%时,该辉钼矿浮选的最佳工艺条件为:温度20℃、p H值8.7,混合抑制剂用量600 g/t,捕收剂用量115 g/t,起泡剂用量60 g/t、磨矿粒度为-74μm占70.93%,浮选转速2000 r/min,充气量0.3 m3/h、刮泡时间8 min;此条件下经"一粗一扫"工艺,可获得钼品位2.81%、回收率为94.62%的粗钼精矿。基于此优化条件,采用"一粗六精一扫"的开路试验流程,可获得品位为45.68%、回收率为31.75%的钼精矿,而采用"一粗六精一扫、中矿顺序返回"的闭路试验流程,最终可获得品位为40.32%、回收率为93.28%的钼精矿。     

快速浮选技术在某高滑石型辉钼矿浮选中应用研究

针对某高滑石型辉钼矿, 采用快速浮选技术脱除脉石再浮选辉钼矿的浮选流程, 在磨矿细度-74 μm粒级占90％、滑石捕收剂MIBC用量50 g/t、脉石抑制剂水玻璃用量600 g/t、捕收剂煤油用量120 g/t、起泡剂2^#油用量20 g/t条件下, 得到了钼品位7.79%、回收率85.26%的钼粗精矿, 实现了滑石和辉钼矿的有效分离。     

某选矿厂选硫浮选药剂试验

为了解决罗河选矿厂采用传统捕收剂和起泡剂进行选硫生产过程中存在的药剂刺激性气味大、需要现场人工配制、且产品回收率低等问题，针对浮选药剂种类和用量进行了试验研究。试验通过采用捕收剂L968粗选用量100 g/t、扫选用量30 g/t，起泡剂DF201粗选用量15 g/t、扫选用量7 g/t的药剂组合和药剂制度，最终获得了有效硫品位为42.56%、回收率为90.67%的硫精矿，新药剂刺激性气味小，且为液体药剂无需配置。     

四川某稀土矿选矿试验研究

针对四川某稀土矿选矿工艺存在的稀土回收率低的问题，开展了一系列选矿试验研究。试验结果表明，在矿浆质量浓度为30%，粗选NaOH用量为600g/t，水玻璃用量为3000g/t，EF1106用量为3500g/t，起泡剂用量为60g/t情况下，采用一粗、三精、两扫、中矿按顺序返回的选矿流程，可获得稀土REO的品位和回收率分别为66.32%和79.88%的稀土浮选精矿。与该选厂的生产指标相比，稀土回收率提高了13.93%。     

基于均匀试验设计优化煤泥浮选药剂制度

为了研究浮选药剂制度对煤泥浮选的影响,以水峪选煤厂的煤泥为研究对象,基于均匀试验设计方法建立浮选效果与药剂用量之间的数学模型,考察捕收剂和起泡剂用量对浮选效果的影响。研究结果表明:捕收剂在一定的用量范围内,煤泥浮选效果只与起泡剂用量存在相关关系; 最佳的起泡剂用量为75 g/t,适宜的捕收剂用量为130 g/t; 与现场药剂用量捕收剂257 g/t和起泡剂143 g/t相比,在保证精煤灰分不变的情况下,浮选精煤产率提高0.49 %,可燃体回收率提高0.50 %,浮选完善指标提高0.17 %,捕收剂用量降低127 g/t,起泡剂用量降低68 g/t; 当捕收剂用量在一定范围内时,起泡剂用量是影响浮选效果的关键因素,适宜的起泡剂用量可显著提高煤泥分选效果。     

China rare earth market review

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     

China rare earth market review

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     

China rare earth market review

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,     

New energy vehicle:an opportunity for rare earth magnets

<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     

注浆加固技术在十三矿-685 m进风大巷中的应用

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。     

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.     

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.     

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