某高碳铅锌银多金属硫化矿浮选试验研究

针对高碳铅锌银多金属硫化矿难选的问题,对某高碳硫化矿进行了试验研究。该矿中铅品位3.72%,锌品位8.34%,银品位34.13 g/t。通过流程探索,确定了预先脱碳—铅锌优先浮选工艺流程。在此基础上进行了条件试验研究,确定适宜磨矿细度为-0.074 mm占90%。确定最佳药剂制度为:铅浮选Zn SO4+Na2SO3用量为2000 g/t,捕收剂乙硫氮用量为80 g/t,锌浮选硫酸铜用量为800 g/t,丁基黄药用量为100 g/t。经闭路流程试验,得到最终指标为:铅精矿品位52.14%,回收率为88.54%,伴生银的品位为368.50 g/t,回收率68.04%,锌精矿品位60.23%,回收率为90.16%。     

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。     

应用重选—浮选联合工艺综合回收窑渣中金、银的试验研究

某锌冶炼回转窑渣中金、银的品位分别为 1.78 g/t 和 202.40 g/t,渣中金矿物以粗粒和中粒金嵌布为主,且银矿物主要以硫化银和金属银的形式赋存。针对窑渣的矿石性质,应用重选—浮选联合工艺回收窑渣中的金银。试验结果表明:在磨矿细度-0.074 mm 占 75%、给矿速度为 2 kg/min、流态化水水量为 3.5 L/min、扩大重力倍数为 70 g、给矿质量分数为 45% 的工艺条件下,进行尼尔森重选,可获得金品位为 204.20 g/t、金回收率为 69.77% 的金精矿。尼尔森尾矿再经过一次粗选、两次精选和一次扫选的闭路流程作业后,又可获得银品位为 825.50 g/t、银回收率为 77.82% 的银精矿。     

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.     

铅银渣中铅矾浮选试验研究

针对某冶炼厂铅银渣中铅品位17.55%的细粒级铅矾进行了浮选回收试验研究。结果表明, 采用液固比为2 mL/g的清水对铅银渣清洗过滤两次, 在浮选给矿浓度30%, pH调整剂氧化钙用量500 g/t、抑制剂硅酸钠用量2 000 g/t、捕收剂水杨羟肟酸用量1 500 g/t、起泡剂松醇油用量75 g/t, 浮选时间4 min的条件下, 经一粗一扫三精、中矿顺序返回的浮选闭路流程, 获得了精矿铅品位47.18%、铅回收率76.39%, 有效回收了铅银渣中的有价金属铅矾, 为该铅银渣的有效利用提供了技术依据。     

某银、铅、锌多金属矿的浮选试验研究

该复杂多金属矿银、铅和锌品位分别为184 g/t、0.56%和2.56%,银优先浮选的试验结果表明,难以获得高品位的银精矿,推荐铅锌依次优先浮选流程,将银矿物富集到铅精矿中,获得银铅精矿、锌精矿。实验室闭路试验结果为:银铅精矿的银品位8 978 g/t、铅品位48.53%,相应的银回收率71.73%、铅回收率91.59%;锌精矿的银品位875 g/t、锌品位45.28%,相应的银回收率22.46%、锌回收率84.69%。银铅精矿和锌精矿中银回收率相加得银的总回收率为94.19%。     

某低品位多金属金矿综合回收试验研究

某低品位多金属金矿中含有金、银、铅、铁等多种有价元素,有用矿物嵌布关系复杂且粒度较细,含量较低但综合利用价值较高。原矿在磨矿细度-0.074mm含量60%、捕收剂丁黄药和丁铵黑药用量分别为64g/t、13g/t的条件下进行混合浮选,获得金、银、铅混合精矿。混合精矿在pH值为11、矿浆浓度40%、氰化钠用量5kg/t、浸出时间36h的条件下进行氰化浸出获得金、银,对原矿金、银回收率分别为67.24%、38.30%。浸渣在抑制剂氧化钙用量1500g/t、捕收剂乙硫氮和丁铵黑药用量分别为40g/t、10g/t的条件下进行浮铅试验,获得了对原矿铅品位45.32%、回收率53.98%的铅精矿和对原矿回收率为3.16%、5.07%的金、银,金、银总回收率分别为70.40%、43.37%。混合浮选尾矿在磁场强度为111kA/m的条件下,通过一段粗选一段精选,获得了铁品位56.30%、回收率12.76%的铁精矿。采用此工艺综合回收了有价金属,获得了较好的选别指标,为该矿的开发利用提供了重要依据。     

浙江某复杂难选银多金属矿石选矿试验

浙江某银多金属矿石银、铜、铅、锌含量分别为153 g/t、0.29%、0.83%、1.41%,铜、铅、锌主要以硫化物形式存在,主要有用矿物黄铜矿、方铅矿、闪锌矿之间以及与毒砂之间连生紧密,嵌布粒度粗细不均且形状不规则。为高效开发利用该矿石资源,在工艺矿物学研究基础上进行了选矿试验研究。试验结果表明,在磨矿细度为-0.045 mm占91.4%的情况下,采用1粗4精1扫铜铅混浮、铜铅混合精矿1粗2精2扫抑铅浮铜、混浮尾矿1粗4精2扫、中矿顺序返回流程处理,可取得铜品位为22.47%、银品位为1 373 g/t、铜回收率为69.08%、银回收率为8.02%的铜精矿,铅品位为40.63%、银品位为6 585 g/t、铅回收率为81.14%、银回收率为71.64%的铅精矿,锌品位为41.72%、银品位为197 g/t、锌回收率为79.85%、银回收率为3.48%的锌精矿。试验闭路流程是该矿石高效开发利用流程。     

甘肃某富银难选铅锌矿选矿试验

针对甘肃某富银难选铅锌矿品位低、氧化率高、共生关系复杂的特点,采用部分优先浮铅-混合浮选铅锌的工艺方案进行了选矿试验研究。试验结果表明,在适宜的磨矿细度和药剂制度下,采用试验确定的闭路流程处理该矿石,可获得铅品位为58.71%、铅回收率为21.81%、含银7 476.81 g/t、银回收率为14.39%的铅精矿以及铅、锌、银品位分别为25.61%、23.64%、5 593.42 g/t ,铅、锌、银回收率分别为54.39%、65.67%、59.49%的铅锌混合精矿。铅总回收率达76.20%、锌总回收率为67.24%、伴生银总回收率为73.88%。     

新型无毒有机抑制剂在广西某多金属硫化矿浮选中的试验研究

广西某多金属硫化矿铜铅嵌布粒度细,铅锌品位低,矿石性质复杂。采用铜铅混浮磨矿再分离—铜铅尾矿再浮锌的工艺流程,将自主研发的新型无毒环保有机抑制剂FY09和FY12,分别应用于铜铅混浮精矿抑铅浮铜,铜铅尾矿抑硫浮锌,选别效果较好。闭路试验得到:铜精矿铜品位26.19%、铜回收率88.20%,银品位748.65g/t、银回收率70.53%;铅精矿铅品位55.27%、铅回收率72.16%,银品位1527.43g/t、银回收率18.66%;锌精矿锌品位45.44%、锌回收率84.75%。铜、铅、锌、银有价金属得到有效回收。     

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     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<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     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。