高温高酸浸出渣浮选银工艺研究

某厂高温高酸锌浸出渣含银401.6 g/t、锌3.37％、铅20.41％、硫12.52％.分析浸出渣的性质和银的物相,研究用硫化钠预处理渣,加入丁基黑药和乙硫氮组合药剂来提高银浮选指标.锌的浸出渣经过一次粗选、两次精选及三次扫选流程,得到了银品位为2017.45 g/t、银回收率达到78.44％的银精矿.     

从锌冶炼渣中回收银的试验研究

某锌冶炼渣含高品位银360 g/t, 银在浸出渣中的形态比较复杂, 且绝大部分银被黄钾铁矾包裹, 回收困难。根据浸出渣性质进行了试验研究, 最终采用焙烧浸出除铁、焙烧浸出渣浮选富集银, 得到的银精矿品位为3 899 g/t, 银回收率为88.09%, 实现了资源的综合回收。     

选冶联合综合回收铅银渣中金银试验研究

为充分开发和利用二次资源,对铅银渣进行试验研究。渣中银品位为158.3 g/t,金品位为1.02 g/t,具有较高的回收价值。铅银渣具有水分大、可溶物含量高,粒度较细等特点。试验采用硫酸化焙烧—洗涤—磨矿后浮选的工艺,当硫酸用量为2.0 kg/t,焙烧温度为800℃,焙烧时间为4 h,磨矿细度-44μm含量占90%,T19用量为2.0 kg/t,硫酸铜用量为400g/t,酯-30用量为300 g/t时,进行闭路试验。经过一次粗选、一次精选、一次扫选、中矿单独处理的闭路流程,可获得银品位为1 755.48 g/t,银回收率为84.17%的银精矿,银精矿中金的品位为12.16 g/t,金回收率为90.52%的较好指标,实现了铅银渣的综合利用。     

锌浸出渣高效浮选银试验研究

根据锌湿法冶炼渣的特点及性质,通过L₉(3^₃)正交试验研究了锌浸出渣浮选银过程中六偏磷酸钠、硅酸钠、丁铵黑药的浮选效率。通过对极差分析和方差分析得出：影响银品位显著性为六偏磷酸钠>硅酸钠>丁铵黑药,回收率显著性影响为硅酸钠>六偏磷酸钠>丁铵黑药。为进一步探索试验效果,根据银品位以及回收率最佳药剂制度验证试验,确定银最佳浮选条件为六偏磷酸铵500g/t、硅酸钠550g/t、丁铵黑药700g/t。采用一次粗选两次扫选三次精选的全闭路试验,获得产率为7.21%,品位为9212.20g/t,回收率为85.09%的银精矿。     

高氰高碱条件下从氰化尾渣中综合回收金银铅锌的研究与应用

青海某金矿氰化车间产生的氰化尾渣中,含有金、银、铅、锌等有价元素,其中金品位2.68g/t,银品位28.76g/t,铅品位1.27%左右,锌品位1.05%左右,均具有较高的回收利用价值。利用浮选工艺,在高氰高碱度介质中,在对氰化尾渣进行擦洗性磨矿,破坏金属矿物被氧化的矿物表面后,采用一次粗选、两次扫选、两次精选的浮选流程,最终获得了铅+锌品位33.45%、金品位16.26g/t、银品位332.84g/t的浮选精矿,同时氰化尾渣中的砷被抑制,精矿中的砷品位仅为0.35%,实现了资源的综合回收。     

浮选回收某锌渣中银的中试研究

内蒙古某锌冶炼公司的锌渣中富集有190~260g/t的金属银,其中可回收的银占到70%左右;但是该锌渣粒度细,化学组成复杂,含有一定量的聚丙烯酰胺,且渣中的银以多种形态赋存,使得银的综合回收率很难得到提高。针对这些特点,在实验室可行性探索实验的基础上,通过中试试验的对比和优化研究,最终确立了一粗一精二扫与中矿集中单独再选的联合浮选工艺。该工艺的中试试验的综合指标为:给矿平均品位为Ag 236.0g/t,银精矿的平均品位为Ag 10743.67g/t,银回收率达62.06%。     

从某金矿氰化渣中回收金银的试验研究

新疆某金矿的浮选精矿经生物氧化,氧化渣再氰化提金后,氰化渣中金银含量仍较高。针对该氰化渣进行了重选和浮选试验,确定了碳酸钠 水玻璃作组合调整剂、硫酸铜作活化剂、异戊基黄药 丁铵黑药作组合捕收剂、RB-3作起泡剂的药剂制度,以及二次粗选、三次精选的开路流程。氰化渣金、银品位分别为7.40 g/t和24.96 g/t时,开路试验可获得精矿中金品位24.68 g/t,回收率61.30%;银品位67.21 g/t,回收率47.47%的较好指标。浮选精矿产品的X射线衍射结果表明,氰化渣中载金矿物为未氧化的白铁矿和黄铁矿,且脉石矿物的粒度极细,直接影响精矿的浮选指标。     

冶炼废弃渣综合回收金银新工艺实验研究

为综合回收二次资源,对冶炼废弃渣进行实验研究.渣中金品位为587.15 g/t,银品位为7.80％,具有较高的回收价值.实验采用磨矿-预先筛分-快速浮选-常规浮选新工艺,磨矿细度-74 μm 90％,采用154μm隔筛预先筛分,快速浮选条件为硫化钠用量为500 g/t,硫酸铜用量为200 g/t,戊基黄药用量为100 g/t,酯11用量为50g/t.闭路实验最终可获得金品位为1180.96 g/t,金回收率为94.21％,含银品位15.76％,银回收率94.81％的总精矿,可实现废弃渣的综合利用.     

甘肃某锌挥发窑渣回收碳银的试验研究

甘肃某锌挥发窑渣中碳品位为16.50%,银品位为156.20 g/t。为了综合回收窑渣中的碳、银等有价组分,进行了浮选试验研究。试验结果表明,窑渣在磨矿细度为-0.074 mm含量为75%的条件下,经过一次粗选和一次精选回收焦炭,碳粗选尾矿和精选中矿合并再经过一次粗选、两次精选、一次扫选和中矿顺序返回的闭路流程回收银,最终获得了含碳71.20%、碳回收率为95.16%的碳精矿和含银822.50 g/t、银回收率为82.11%的银精矿。     

铁矾法炼锌工艺中回收银的研究

在铁矾法炼锌工艺中,溶解于溶液中的Ag~+吸附于锌焙烧料中残余的闪锌矿ZnS(0.3—0.5wt%S)表面,或生成银铁矾型化合物使银富集于酸浸渣。控制沉矾过程中焙砂的用量,保证沉矾前液清亮是降低铁矾渣中的银含量的有效措施。高酸浸出渣中的银铁矾型化合物须酸分解转化为可浮的银矿物。故从高酸浸出渣Ag(300g/t)中可用超酸浸出—硫化浮选法回收银,银的回收率76.54%,银精矿品位4456.0g/t。     

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