某铅锌矿铜铅分离试验研究

某铅锌矿山铜铅混合精矿采用活性炭再磨脱药,重铬酸盐抑制铅矿物进行铜铅分离,工艺指标差且重铬酸盐对环境污染严重。本试验采用硫化钠+活性炭进行脱药,并采用环保有机高分子化合物ZJ201为方铅矿抑制剂对铜铅混合精矿进行处理,经"一粗三精一扫"浮选,可得到铜精矿铜品位31.80%、铜回收率88.12%,铅精矿铅品位45.17%,铅回收率99.18%的两种精矿,有效完成了铜铅分离。     

某氰化尾渣综合回收铜铅选矿试验研究

采用混合浮选工艺对氰化尾渣中铜、铅进行了综合回收。试验结果表明:采用石灰作为调整剂、硫酸铜作为活化剂、丁基黄药+丁铵黑药作为捕收剂,在一次粗选、两次扫选、四次精选混合浮选闭路工艺流程下,可获得铜、铅、金、银品位分别为18.50%、9.67%、19.41 g/t和850.22 g/t,回收率分别为85.02%、58.38%、33.67%和69.19%的铜铅混合精矿。铜铅混合精矿采用浮铅抑铜工艺可获得铅品位为68.40%的铅精矿和铜品位为20.38%的铜精矿,试验指标较为理想,实现了二次资源的综合利用。     

西藏某难选铜铅多金属矿石铜铅浮选分离试验研究

西藏某难选铜铅多金属矿石中多种金属矿物密切共生,硫化物之间嵌连关系较为复杂,且含有大量的次生硫化铜及氧化铜矿物,铜铅分选极为困难。针对该矿石特点,进行了铜铅混合浮选—混合精矿分离、优先浮钼、优先浮铜—再浮铅等多种工艺流程探索试验。结果表明:优先浮铜—再浮铅工艺流程可获得较好指标,闭路试验获得铜品位25.01%、铜回收率81.92%、含铅6.71%的铜精矿,铅品位45.89%、铅回收率70.09%、含铜1.69%的铅精矿,实现了矿石中铜铅的有效分离。     

陕西某银铅矿铜铅分离研究

以陕西某银铅矿为研究对象，针对该矿铜铅混合浮选精矿再分离做了大量试验工作，找出了铜铅分离的药剂方案，并成功应用于生产中，取得了铜精矿品位19.61%，铜回收率83.11%；铅精矿品位52.49%，铅回收率87.42%；铜精矿和铅精矿银总回收率达到91.99%较为理想的生产指标。在此基础上用高效环保药剂替代有毒药剂，获得了接近于有环境污染压力药剂的生产指标，为该矿持续稳健生产奠定了基础。     

内蒙古某矿业公司铅精矿分离铜的选矿试验研究

内蒙古某矿业公司铅精矿中含有2.5%左右的铜,由于设计试验研究未能成功进行铜铅分离,选矿厂只生产铅精矿,使铜损失于铅精矿中。经过大量的铜铅分离试验研究,使用铅矿物组合抑制剂,成功实现了铜铅的有效分离,获得了含铜品位为15.80%、铜回收率为86.84%的铜精矿和含铅品位为48.90%,铅回收率为97.95%的铅精矿。铜精矿中损失铅回收率为2.05%。     

四川某高硫铜铅锌硫化矿选矿试验研究

对四川某复杂高硫铜铅锌矿进行了工艺矿物学研究后,采用部分混合浮选流程,铜铅混浮—铜铅分离—混浮尾矿选锌,最终获得铜品位17.5%,回收率为51.80%的铜精矿,铅品位为60.10%、回收率为79.51%的铅精矿,锌品位为47.01%、回收率为78.64%的锌精矿,硫品位为38.92%、回收率为72.64%的硫精矿,同时铜铅分离生产验证试验取得良好指标。     

铜铅分离工业试验研究

八方山铅锌矿为多金属硫化矿,含铜0.2%~0.3%,含铅1.0%。为了综合回收各种有用矿物,结合生产实际改进设计流程,采用铜铅部分混合浮选,尾矿选锌工艺流程,工业试验取得了较好的工艺指标。铜精矿品位达到29.35%,回收率54.10%;铅精矿品位达到59.18%,回收率86.96%。     

某复杂铜铅锌混合精矿选矿试验研究

云南某地生产的铜铅锌混合精矿含铜8.22%,含铅28.87%,含锌11.36%,对其采用对环境污染较小的药剂进行铜铅分离试验研究,使用铜铅分离不脱锌的流程,最终获得铜品位20.11%,铜回收率90.66%的铜精矿和铅品位45.91%,铅回收率96.56%,锌品位16.55%,锌回收率88.59%的铅锌混合精矿。     

难选铜铅锌混合矿石选矿试验研究

针对某细粒嵌布、氧化程度较高的难选铜铅锌混合矿石,采用部分混合优先浮选,即铜铅混浮,再铜、铅分离,铜铅尾矿选锌的浮选工艺流程进行铜、铅、锌选别试验研究。其结果表明:在最佳条件下,闭路试验获得了铜品位38.63%、铜回收率42.53%的铜精矿,铅品位65.37%、铅回收率53.13%的铅精矿,锌品位57.79%、锌回收率30.85%的锌精矿,为多金属混合矿石的回收利用提供借鉴。     

内蒙古某铜铅矿选矿试验研究

针对内蒙古某铜铅矿矿石性质,进行了浮选试验研究。采用铜铅混合浮选后再进行抑铅浮铜,且选用自行配制的组合抑制药剂TZ11,获得了铜精矿铜品位24.59%、铜回收率86.11%,铅精矿铅品位52.81%、铅回收率73.11%的较好技术指标。     

火焰原子吸收光谱法测定纯铜和铜合金中铅

以往采用火焰原子吸收光谱法(FAAS)测定纯铜和铜合金中铅时,多采用分离富集法对铅进行富集或者采用标准加入法绘制校准曲线以消除基体的影响,操作较为繁琐。实验考察了不同含量铜基体对铅测定的影响,结果表明,当溶液中铜的质量浓度不大于20mg/mL时,铜对铅测定的影响基本可忽略,当溶液中铜的质量浓度为20~80mg/mL时,铜对铅测定的干扰不可忽略。因此实验提出,对于铅质量分数不小于0.05%的样品,采用铅标准溶液系列直接制作校准曲线,对于铅质量分数小于0.05%的样品,采用不含铅的高纯铜进行基体匹配绘制校准曲线的方法以消除基体干扰,最终实现了FAAS对纯铜和铜合金中质量分数大于0.002%的铅的测定。考察了酸介质和酸度对测定的影响,最终选择硝酸(1+1)溶解样品。根据不同样品量和不同的稀释因子,通过计算设计了3种系列标准溶液绘制校准曲线,使得校准曲线用标准溶液中酸的浓度与样品溶液中酸的浓度相同从而避免了酸度对测定的影响。将实验方法应用于纯铜、铜合金标准样品中质量分数在0.004%~2.7%之间铅的测定,测得结果与认定值基本一致,相对标准偏差(RSD,n=7~9)为0.7%~1.8%。     

Microbiological leaching of copper from lead mattes

The possibility of recovering copper from lead blast furnace mattes by bioleaching, using bacteria of the genus Thiobacillus ferrooxidans, has been studied. In this paper, the influence of certain variables on the dissolution rate and the adaptation period of the bacteria have been evaluated, including energy source, nutrient, type of matte, type of stirring, pulp density, and particle size. In addition, the influence of bioleaching for different periods of time, as a preparatory stage before chemical or biological leaching of the matte, was studied. The optimum conditions for recovery are achieved by way of the two-stage bioleaching process. The degradation of the solid caused by bacterial activity during the first stage is the reason for the high recovery during the second stage.     

The co-precipitation of copper and zinc with lead jarosite

The formation of lead jarosite, Pb_0.5Fe₃(SO₄)₂(OH)₆, in the presence of dissolved copper and/or zinc results in a significant substitution of these metals in the jarosite phase; the co-precipitation is most pronounced in sulphate media but also occurs, to a lesser degree, in chloride solutions. The copper and/or zinc substitute for iron, and under extreme conditions the product approaches beaverite, Pb(Cu,Zn)Fe₂(SO₄)₂(OH)₆, in structure and composition. The extent of co-precipitation increases sharply with increasing concentrations of dissolved CuSO₄ or ZnSO₄ and slightly with either an increasing stoichiometric ratio of PbSO₄/Fe³⁺ or increasing ionic strength. The co-precipitation of copper or zinc is not significantly affected by acid concentration although the yield of product declines with increasing concentration of H₂SO₄. The extent of reaction is relatively insensitive to reaction temperatures in the range 130–180°C and to reaction times in excess of 2 h. Copper is strongly co-precipitated in preference to zinc from solutions containing both metals. Other divalent base metals such as Co, Ni and Mn are also co-precipitated with lead jarosite although not to the same degree as copper or zinc.     

The corrosion of lead anodes in copper electrowinning

The steady-state corrosion rate of 0.4 pct As-10 pct Sb-Pb anodes in H₂SO₄ copper electro-winning electrolytes was studied. The corrosion rate increases markedly with increasing acid strength and current density, although the corrosion per pound of copper electrowon is affected only slightly by current density. Several ions such as Cu⁺², Mg⁺², Al⁺³, SiO₃ ^-2 and Na+ have no effect on the corrosion while Fe+S and Ni+2 ions have moderate inhibiting effects. Strong corrosion inhibition is brought about by introducing small amounts of Co*2 into the solution or by substituting a Ca-Pb alloy for the conventional antimonial lead anodes.     

石墨炉原子吸收光谱法测定高纯二硫化钼中铜铅

用硝酸和盐酸溶解高纯二硫化钼样品 ,磷酸二氢铵及硝酸镁溶液作为基体改进剂 ,石墨炉原子吸收光谱法测定高纯二硫化钼中铜、铅。检出限分别为铜 :0.68μg/L ,铅 :1 5 7μg/L。该法快速、简便、准确 ,结果满意     

高铜铅银阳极板的电解

介绍含高铜铅银阳极板电解生产情况,讨论各主要工艺参数电解时对电银质量的影响,批阳了由含杂同奶阳极板电解生产国际１号银的工艺条件。     

火焰原子吸收光谱法连续测定铝及铝合金中痕量铅、铜

首次采用镧盐和碳酸盐作共沉淀剂 ,在氢氧化钠强碱性介质中实现了铝及铝合金中痕量铅、铜与基体的分离富集 ,沉淀用硝酸溶解后 ,在原子吸收光谱仪上进行测定。本方法操作简单 ,不用有机试剂 ,干扰少 ,铅、铜的加标回收率分别在97%～ 10 1%和 98%～ 10 1. 3 %之间 ,相对标准偏差分别小于 2.40 %和 2. 2 5 % ,测量下限分别为 4.0× 10 - 6 和 1. 5× 10 - 6 ,准确度和精密度完全能满足分析的要求     

Zinc,nickel and lead in copper deposited from copper(II) ammine sulphate electrolytes

The influence of electrolytic variables on the content of Zn, Ni and Pb in copper deposited cathodically from ammine solution has been investigated. Solutions spiked with zinc or nickel sulphate were studied using a rotating cylindrical titanium cathode and a lead anode.The nickel and zinc contents in the cathodic deposit increase with increasing current density and their concentration in the electrolyte. A rise in the rotation speed of the cathode increases the lead and nickel contents but diminishes the zinc content in the deposit.To explain these results an attempt has been made to schematically reconstruct polarisation diagrams for each metal. Direct potential measurements are subject to considerable experimental error in the system studied. Polarisation measurements performed on a simplified system were in good agreement with the hypothetical diagram.     

铜铅多金属混合矿石优先浮选工艺试验研究

某铜铅矿石含铜·0．96％,含铅1．04％,属于铜铅多金属混合矿石。对该矿石进行混合浮选,其浮选精矿的铜铅分离很困难。最终通过优先浮选铜一尾矿浮选铅的工艺流程,并采用组合药剂抑制铅,浮选闭路流程试验获得了较好的指标：铜精矿铜品位24．35％,含铅6．91％,铜回收率82．04％;铅精矿铅品位45．13％,含铜1．73％,铅回收率68．54％。