络合剂-抑制剂联合抑镁浮铜镍试验

为了降低西北某高镁铜镍硫化矿铜镍混浮精矿中氧化镁的含量,以EDTA二钠络合清洗含镁脉石矿物表面吸附的Cu²⁺、Ni²⁺,六偏磷酸钠和JC抑制含镁脉石矿物,对镍品位为1.29%、铜品位为0.87%、MgO含量为29.02%的矿石进行了提质降镁试验。结果表明：采用1粗2精3扫、中矿顺序返回的铜镍混浮闭路流程处理该矿石,最终获得了镍、铜品位分别为8.95%、5.21%,镍、铜回收率分别为82.91%和71.56%,MgO含量为6.13%的铜镍混合精矿;与现场工艺流程相比,优化后的工艺流程更简洁,既减少了磨矿作业段数,又大幅度简化了浮选工艺流程,且混合精矿镍、铜品位分别提高了0.28、0.71个百分点,镍、铜回收率分别提高了0.35、1.38个百分点,MgO含量下降了0.59个百分点,达到了较好的优化工艺流程、提高分选指标的效果。     

某高镁铜镍矿石浮选试验

某高镁铜镍矿石含镍0.76%、铜0.16%、氧化镁25.12%,铜矿物主要为黄铜矿,镍矿物主要为镍黄铁矿,脉石矿物主要有透闪石、滑石、蛇纹石,橄榄石、透辉石及绿泥石等少量,有害杂质组分滑石、蛇纹石及绿泥石等的含量高达42%。矿石中铜、镍的氧化率均较低,原生硫化铜占总铜的87.50%,硫化镍占总镍的98.68%。为获得低镁铜镍混合精矿,进行了选矿试验。结果表明,矿石在磨矿细度为-0.074 mm占70%的情况下,采用2粗2扫2精,精选1尾矿连续2次精扫选,精选2尾矿与精扫选1精矿合并返回,其他中矿顺序返回流程处理,可获得铜品位为2.28%、镍品位为11.81%、铜回收率为70.37%、镍回收率为76.20%、氧化镁含量仅为4.38%的铜镍混合精矿,产品达到一级品质量标准(镍品位大于10%,氧化镁含量小于6%);抑镁效果取得成功的关键在于在精选段添加了北京矿冶研究总院研制的含镁脉石矿物的高效抑制剂——改性CMC(总添加量为480 g/t)。试验流程具有稳定、低药耗、高效等优点,适合该矿石的处理。     

铜镍硫化矿石直接浮选小型试验研究

采用部分优先浮铜—铜镍混浮—铜镍分离的阶段磨选流程对某地高铜低镍硫化矿石进行了小型试验研究。结果表明 ,在碳酸盐介质中BY - 5是含镁脉石矿物的有效抑制剂 ;YD组合药剂可在低碱介质中实现铜镍分离 ,并获得较好分选指标     

低品位铜镍矿石高效分选及综合回收试验研究

某低品位铜镍矿含镍0.50%,含铜0.15%,金、银的含量较低,含镁较高。脉石矿物中含有大量可浮性较好的蛇纹石、滑石等钙镁矿物,同时原矿中镍氧化率较高,属于难选低品位铜镍矿石。为高效综合回收有价金属资源,对该矿石进行了选矿工艺试验研究。在“铜镍混浮－铜镍分离”的流程结构以及磨矿细度-74μm占75%的条件下,铜镍混浮添加酸化水玻璃配合CMC 共同作脉石矿物的抑制剂,强化脉石矿物的抑制,采用硫酸铜活化镍矿物,选择捕收能力较强的戊基黄药作捕收剂;对于铜镍混合精矿添加活性炭进行脱药,石灰抑制镍矿物,实现铜镍矿物的分离。全流程闭路试验可以得到含铜28.84%、铜回收率74.18%,含镍0.62%、镍回收率0.41%,含金3.30g/t、含银70g/t的铜精矿,含镍6.61%、镍回收率81.80%,含铜0.40%、铜回收率19.27%的镍精矿,铜镍分离效果较好。铜精矿中的金银均达到计价标准,且铜精矿达到了二级品的标准。“铜镍混浮－铜镍分离”工艺实现铜镍矿物的高效分离,减少铜、镍精矿中的互含,同时将贵金属金、银尽可能富集在铜精矿中,实现有用矿物最大限度的回收。     

某低品位难选铜镍硫化矿高效降镁与铜镍分离

新疆某强蚀变型铜镍硫化矿铜镍品位低,氧化镁含量高,铜镍矿物嵌布粒度微细,共生关系密切,属于难选铜镍矿石。针对矿石含镁脉石矿物组成复杂、铜镍矿物呈细粒集合体嵌布的特点,采用"铜镍混浮—混合精矿脱药再磨—铜镍分离"工艺与FY高效抑制剂获得合格的铜精矿与镍精矿。结果表明,对铜镍混合粗精矿,采用组合抑制剂FY精选降镁,可得含铜2.41%、镍4.37%的铜镍混合精矿,精矿含氧化镁由10.64%降至4.61%。铜镍混合精矿经活性炭与硫化钠脱药,再磨至-38μm占85%,石灰与Na_2SO_3抑制镍矿物,Z-200浮选铜矿物,得到含铜22.07%、氧化镁2.65%,回收率73.23%的铜精矿,含镍6.01%、氧化镁5.51%,回收率82.11%的镍精矿,实现铜镍精矿的高效降镁与铜镍有效分离。     

低品位硫化铜镍矿的特性与浮选工艺研究

新疆哈密某低品位硫化铜镍矿石中含镍0.332%、含铜0.208%,目的矿物共生关系复杂、嵌布粒度细,矿石中含镁脉石矿物含量高、可浮性好。为了充分回收矿石中铜镍矿物并降低精矿中的MgO含量,以六偏磷酸钠和CMC作脉石矿物抑制剂,硫酸铜为活化剂,戊黄药、Y-89、丁胺黑药混合为捕收剂,采用"两粗三扫三精"的原则工艺流程,闭路试验获得铜镍混合精矿中镍品位为5.123%,镍回收率为77.80%;精矿中MgO含量为6.11%,达到了冶炼的要求。尾矿中的镍矿物多为不可浮的氧化镍和硅酸镍,工艺流程能较好地适合该矿石性质。     

某低品位铜镍硫化矿石选矿试验

吉林某低品位铜镍硫化矿石铜品位为0.27%、镍品位为0.48%。矿石中含镍矿物主要为紫硫镍铁矿、镍黄铁矿,含铜矿物主要为黄铜矿、铜蓝、斑铜矿。试验研究表明,采用单一浮选流程不能获得较好的选别指标;由于矿石中紫硫镍铁矿、镍黄铁矿、黄铜矿等有用金属硫化物与磁铁矿嵌布关系密切,因此采用弱磁选对含镍矿物进行富集,获得目的矿物含量高、易泥化脉石含量低的磁性产品和目的矿物含量低、易泥化脉石含量高的非磁性产品,再分别进行磨浮流程处理。结果表明：原矿磨细至-0.074 mm占30%时进行弱磁选,磁性产品和非磁性产品分别再磨至-0.074 mm占85%后采用1粗2精2扫闭路浮选流程处理,获得了铜品位为4.53%、镍品位为6.65%、铜回收率为54.63%、镍回收率为44.90%的铜镍混合精矿1和铜品位为1.88%、镍品位为3.37%、铜回收率为23.98%、镍回收率为24.13%的铜镍混合精矿2,尾矿铜、镍品位分别降至0.06%和0.16%,实现了对该铜镍硫化矿石的有效分选。     

新疆某难选硫化铜镍矿选矿试验研究

根据新疆某硫化铜镍矿矿石的工艺矿物学特性,进行了详细的选矿试验研究,采用一粗一精两扫、中矿顺序返回的铜镍混合浮选流程,使用碳酸钠做pH调整剂,六偏磷酸钠做分散剂,羧甲基纤维素做抑制剂,混合黄药做捕收剂,处理该矿石,得到了混合精矿含镍10.89%、含铜4.27%,镍回收率81.61%、铜回收率85.03%的指标,氧化镁含量低于6.8%,产品质量符合冶炼要求。对六偏磷酸钠和羧甲基纤维素在硫化铜镍矿浮选中的作用机理进行了分析,结果表明六偏磷酸钠能分散蛇纹石与硫化矿物,降低蛇纹石对硫化矿物浮选的影响,而羧甲基纤维素能抑制含镁硅酸盐矿物的上浮,实现硫化矿物与含镁硅酸盐脉石的浮选分离。因此,在含有多种镁硅酸盐脉石矿物的硫化铜镍矿中同时使用六偏磷酸钠和羧甲基纤维素是该类矿石高效利用的关键。     

越南某低品位硫化铜镍矿选矿试验研究

越南某铜镍矿石原矿品位低、分布分散,原矿含Ni为0.495%、Cu为0.21%,脉石矿物中MgO含量高,矿石性质复杂,属于典型的富含镁硅酸盐矿物的低品位难选铜镍硫化矿石。在对矿石进行充分的工艺矿物学的基础上,实验室采用不预先脱除脉石的情况下,采用二粗二扫四精铜镍混浮工艺,中矿顺序返回的闭路试验,粗二精矿再磨流程,最终可获得铜镍混合精矿含Ni为10.25%,Cu为4.84%,回收率分别Ni为68.84%、Cu为78.76%。     

国内某硫化铜镍矿石选矿试验研究

针对国内某硫化铜镍矿石,铜含量为0.43%、镍含量为0.94%,采用铜镍等可浮工艺进行选别,获得了产率为4.12%,铜品位为9.85%,镍品位为11.13%,铜、镍回收率分别为90.72%和49.69%的铜镍混合精矿,同时还获得了产率为6.05%,镍品位为5.15%、铜含量为0.33%,镍回收率为33.76%的镍精矿。与铜优先浮选和铜镍混合浮选工艺相比,铜镍等可浮工艺具有流程稳定,对矿石性质的适应性强,可以根据市场变化情况灵活把握产品的特点。     

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