顶吹炉处理废旧电路板的渣型理论研究

结合顶吹炉处理废旧电路板的渣型试验,通过FactSage软件,对顶吹炉处理废旧电路板的渣型确定过程进行理论分析,并绘制了理想渣型下的冶金相图。结果表明,顶吹炉处理废旧电路板渣型控制的重点在于Al2O3成分的控制,理想渣型为SiO2-CaO-Al2O3-FeO四元渣型,各组分含量范围：SiO2 28%~35%、CaO 18%~25%、Al2O3 6%~13%、FeO 16%~20%,四元组分合计＞80%。在理想渣型下,可实现溢流连续排渣,金属和渣分离彻底,Cu、Au、Ag总回收率均大于95%,平均渣含铜＜0.7%。该渣型范围和相图理论可为各类熔池熔炼炉处理废旧电路板的渣型研究和生产实践提供理论依据。     

废旧印刷电路板熔池熔炼技术节能降碳分析

分析了废旧印刷电路板主要种类的理化特性,结合顶吹熔池熔炼技术的优势,在控制入炉料热值为8.5~9.5 MJ/kg时,通过增加富氧空气使炉料中的有机质充分燃烧,基本能够实现自热熔炼。经过计算,粗铜能耗为220 kgce/t,与矿铜相比可节约2 520 kgce/t,减少CO2排放6.60 t/t,与再生铜相比节约170 kgce/t,减少CO2排放459 kg/t。废旧印刷电路板熔池熔炼技术示范工程实际生产过程中,维持进料时间在2.5~3.0 h时,除停炉放渣及停炉期间需补加燃料外,正常生产时,超过80%生产时间能够实现自热熔炼。     

富氧侧吹熔炼处理电子废料回收有价金属中试研究

在炉床面积3.6m~2富氧侧吹熔池熔炼炉上进行了电子废料熔炼回收有价金属的中试试验,投料速度1.04～2.30 t/h,熔炼区供氧浓度65.80%～66.11%,烟化区供氧浓度31.96%～36.32%,产出炉渣Cu、Au、Ag含量分别为0.11%、0.20 g/t、1.00 g/t,合金中有价金属Cu、Au和Ag回收率分别为98.43%、97.58%和99.27%,相应的渣型组成为:CaO/SiO_2=0.33～0.41、Fe/SiO_2=0.07～0.14、Al_2O_3含量11.33%～12 77%。试验结果表明,采用富氧侧吹熔池熔炼处理电子废料可以高效回收其中铜、金、银等有价金属。     

含金银硫铁精矿烧渣综合回收有价金属试验研究

根据硫铁精矿沸腾炉焙烧产物烧渣的理化性质，开展烧渣回收金、银、铜、铁试验研究。最佳酸浸条件下，获得酸浸渣渣率93.75%、脱Cu率27.08%、脱As率39.72%；酸浸渣最佳氰化条件下，获得金、银氰化浸出率分别为77.45%和49.15%，高于生产水平，氰化渣含Au 0.69 g/t、Ag 12 g/t、Cu 0.11%、Fe 60.69%、As 0.17%、S 0.49%，浸渣金、银品位均较低；采用BY代号药剂处理酸浸溶液，铜回收率达99.9%，铁回收率达72%。     

某复杂金多金属矿石选矿试验研究

吉尔吉斯斯坦某金多金属矿石中伴生多种有价元素,有用矿物嵌布状态复杂且嵌布粒度细。针对矿石性质,采用铜优先浮选—金钴混合浮选工艺流程,可初步实现该金多金属矿石中有价金属的有效分选。闭路试验可获得Au品位228.00 g/t、Au回收率12.19%,Ag品位974.00 g/t、Ag回收率37.71%,Cu品位27.590%、Cu回收率80.65%的铜精矿,以及Au品位65.00 g/t、Au回收率57.22%,Ag品位28.00 g/t、Ag回收率17.86%,Co品位0.5500%、Co回收率53.02%的金钴精矿。     

顶吹炉处理废旧印刷电路板的生产实践

介绍某公司2万t/a废旧印刷电路板火法处理工艺及试生产情况,详细阐述了顶吹炉熔池熔炼技术在废旧印刷电路板火法处理和提取稀贵金属的生产实践。     

某含金多金属矿石的选矿试验研究

在充分论证和试验研究基础上，采用混汞－浮选联合流程及适宜的工艺条件，在原矿品位为Au7.18g/t、Ag47.7g/t、Cu0．207％的情况下，获得了浮选混合精矿含Au54.00g/t、Ag509g/t、Cu3.13%，混汞加浮选回收率分别为Au90.53%、Ag95．98％、Cu97.67%的指标；全泥氰化金浸出率为84．60％、银的浸出率78．60％。     

青海某硫铁铜铅锌矿选矿工艺研究

青海某硫铁铜铅锌矿,其原矿中各有用矿物嵌布关系复杂,造成了浮选过程中有价金属富集困难,尤其是原矿中细粒浸染状的磁黄铁矿交代共生于黄铜矿、方铅矿之间,致使采用普通工艺条件铜、铅回收率不高。针对以上特性,试验采用了铜铅混合浮选—铜铅分离—磁选—磁选尾矿优先浮锌—浮锌尾矿再浮硫工艺流程,在原矿含Zn 2.30%、Pb 1.37%、Cu 0.124%、Ag 18.69 g/t的条件下,获得了铜精矿含Cu 24.26%、Ag 548 g/t,Cu回收率73.75%;铅精矿含Pb 63.27%、Ag 446 g/t,Pb回收率94.20%;锌精矿含Zn 43.63%、Ag 28.56 g/t,Zn回收率82.16%;Ag总的回收率为85.71%的良好指标。     

俄罗斯及独联体国家铜自热熔炼工艺的发展

俄罗斯及其他独联体国家在铜粗炼领域采用各种不同的连续自热熔炼工艺。这些工艺包括氧焰熔炼工艺、瓦纽科夫熔炼工艺、固定式顶吹炉熔炼工艺和可倾炉熔炼工艺。粗铜熔炼工艺的进一步改进涉及用自热熔炼炉生产白冰铜、连续吹炼高品位冰铜并产出含Cu＜0．5%的弃渣。     

内蒙古某铜铅锌复杂多金属矿的浮选试验研究

试验矿样取自内蒙古某地的铜铅锌复杂多金属矿,原矿含Cu 0.25%、Pb 2.53%、Zn 4.47%,并且伴生Ag 92.5 g/t、In 42.5 g/t,研究了该矿石的浮选工艺以及在浮选过程中各种药剂的用量,最终得到铜精矿中含Cu 17.62%、回收率达到58.26%;铅精矿含Pb 66.55%、回收率高达90.39%;锌精矿含Zn 48.12%,回收率90.29%;与此同时,铅精矿含Ag达到1 642.0 g/t、回收率60.3%,锌精矿含In达到248.7 g/t、回收率达到53.5%。结果表明,此浮选工艺可有效处理该复杂多金属矿。     

Journal of Rare Earths Contents List of Vol.32(2014)

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Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Aluminium Production by Province or City in 2014

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China is Planning to Raise rare Earth Resource Tax Again

正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are     

Fabricated Copper Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in