用废黄铜屑生产化工产品

<正> 我厂生产硫酸铜原料主要是氮肥厂铜洗工段废铜泥,为了广开原料来源,我们试验用黄铜屑制取硫酸铜。 一般黄铜屑含铜60～65％,Zn40～35％,若采用通常的焙烧—酸溶法生产硫酸铜则不仅锌损     

阳极铜电解技术改造及生产实践

针对铜冶炼投入原料成分复杂,产出的阳极板杂质含量较高的问题,通过对电解指标电解液过滤量、电解液温度、铜离子浓度、电解液循环速度、添加剂用量及电流密度进行优化调整,达到产出高品质阴极铜、A级铜比例稳定在98%以上的目的。     

铋黄铜及其加工工艺研究

在传统两相黄铜的基础上，加入Bi取代Pb，成功地研制出了无铅易切削黄铜——铋黄铜，并确定了合理的合金成分和加工工艺。利用Pb黄铜的加工设备和类似的生产工艺，成功地生产出了铋簧铜热轧材、挤压材和拉拔线材，其表面质量、切削性能及机械性能都达到或超过了铅黄铜的性能指标。     

金川铜合成炉处理复杂金精矿的工艺研究

金川铜合成炉的铜精矿原料主要来自国外,矿源成分较复杂。铜冶炼行业的迅速扩能导致铜原料市场竞争形势日趋激烈、TC/RC（铜精矿加工费用）持续降低、原料采购难度增大、原料品质降低、企业利润降低。利用火法造锍捕金处理复杂金精矿成为铜合成炉降低成本、提高赢利点的一种新方式。根据金川铜合成炉处理复杂金精矿实际生产经验,从生产实践中存在的问题、提升装备结构、优化工艺过程等方面进行论述,采用单喷嘴结构优化、工艺参数优化后,料坝能够维持在850 mm,冻结层500~600 mm,烟灰率增加控制在7%以内,锅炉对流区温度受控,基本可以实现精矿在反应塔自热及完全反应,为闪速炉处理复杂金精矿提供指导。     

国际动态

芬兰奥托昆普公司铜资产正式剥离芬兰不锈钢生产商奥托昆普公司(Outokumpu)将旗下最后一座铜加工厂出售给了荷兰私营金属公司Bons&Evers控股公司。该厂生产黄铜棒,拥有员工170人,位于荷兰德卢内市(Drunen)。Bons&Evers生产热锻黄铜产品和黄铜加工产品,相关生产厂位于:荷兰博尔讷(Borne)、德国弗伦巴赫     

铜冶炼企业产品质量控制的探索与实践

为了保持阴极铜化学成分和质量长期稳定,某铜冶炼企业对阴极铜化学成分进行监控,对铜冶炼生产系统中电解工序物料、产出后又重回本系统物料、贵金属系统中产出物料、外购原料中物料的杂质总量进行分析,提出了减少杂质对阴极铜质量影响的措施,为阴极铜质量的稳定创造了良好的生产条件,并提升了企业适应复杂原料市场的能力。     

铜火法精炼炉降低还原天然气单耗的生产运用分析

文章选用东南铜业火法厂精炼炉铜阳极板为例,阐述以吹炼粗铜及流程冷铜为原料,通过氧化去除杂质后,使用天然气为还原剂进行还原除氧,产出合格阳极铜。然而在生产中,火法精炼炉工艺仍存在,如天然气的单耗较高、氧化还原时间较长等诸多问题。对此,文章针对阳极精炼浅氧化进行研究,探究铜火法精炼炉降低天然气单耗的生产应用措施,以便更好地将天然气能耗有效降低。     

新型萃取剂提取铜的研究

采用高效铜萃取剂AD-100对两种复杂料液进行萃取除杂,反萃液铜可富集到约40g/L,杂质含量低,总萃取效率约95%,总反萃效率约97%,产出高品质的硫酸铜溶液可用于生产硫酸铜或铜粉产品,实现了铜的开路,增加了经济效益。     

新型高效环保黄铜细化剂对铅黄铜锭组织和性能的影响

研究了AZ-1新型黄铜细化剂的晶粒细化作用，与稀土细化剂的晶粒细化效果进行了比较；分别对用AZ-1新型细化剂和稀土细化剂细化处理的铅黄铜锭进行了组织和性能的对比研究。生产试验结果表明，AZ-1新型细化剂具有显著的晶粒和相细化作用，其细化能力明显优于稀土细化剂；与稀土细化剂细化处理的铅黄铜锭相比，用AZ-1新型细化剂制备的铅黄铜锭的显微组织及铜液流动性较好。     

企业动态

洛阳铜加工集团有限责任公司管棒厂下大力气进行新产品开发。日前成功试制出C33000铅黄铜管。过去铅黄铜管在常温下塑性较差,冷加工比较困难,容易开壁,往往只生产棒材,很少生产管材。随着市     

混合矿模拟冶炼黄铜对比试验

选用4种铜矿进行混合矿模拟冶炼黄铜对比试验,并利用X射线衍射、X射线荧光、金相显微镜、扫描电子显微镜和电感耦合等离子发射光谱等技术对矿石、黄铜样品和试验残渣等进行检测分析。结果表明,4组模拟试验获得的黄铜主要含铜、锌和铅3种元素,含锌17%~28%(与目前已发现的早期黄铜含锌量相当),其他元素含量均小于0.1%,金相组织均为等轴晶和孪晶。     

BFe10-1-1铸锭生产工艺研究

通过配料→加料→熔化→化学成分分析→铸造工艺试验,以及对铸锭生产工艺参数的不断调整和铸造模具结构的改进,摸索出生产Ф165mmBFe10-1-1白铜铸锭的最佳工艺参数和操作规程,以及解决铸锭缺陷的一些措施。     

阴极铜上口粒子成因及减少办法

高纯阴极铜是重要的工业原料,近年来,阴极铜产能迅速扩张,原料供应越来越紧张,杂铜原料和外购阳极板数量不断上升。外购阳极在电解精炼过程中阴极铜上口长粒子,影响阴极铜的质量。就阴极铜上口长粒子的成因进行了分析,并且对减少和消除上口粒子的方法进行了论述。     

Comparison of the strain-hardening parameters of sheet metals in uniaxial and biaxial tension

The strain-hardening parameters of steel, copper and brass were determined by uniaxial and balanced biaxial tensile tests. The stress-strain relationship of steel was well described by the Hollomon equation while, the Voce equation was valid for copper and brass. Thus the use of then-value as a measure of strain-hardening ability is justified for steel only and uniform strains have to be used for copper and brass. The uniaxial and biaxialn-values of steel were found to be equivalent. However, the stress-strain relationships of copper and especially brass were observed to be stress-state dependent. Forming limit diagrams of the materials were constructed using hydraulic bulging and tensile tests. The FLDs were also calculated using the plastic instability conditions and the strain-hardening parameters determined.     

Comparison of the strain-hardening parameters of sheet metals in uniaxial and biaxial tension

The strain-hardening parameters of steel, copper and brass were determined by uniaxial and balanced biaxial tensile tests. The stress-strain relationship of steel was well described by the Hollomon equation while, the Voce equation was valid for copper and brass. Thus the use of then-value as a measure of strain-hardening ability is justified for steel only and uniform strains have to be used for copper and brass. The uniaxial and biaxialn-values of steel were found to be equivalent. However, the stress-strain relationships of copper and especially brass were observed to be stress-state dependent. Forming limit diagrams of the materials were constructed using hydraulic bulging and tensile tests. The FLDs were also calculated using the plastic instability conditions and the strain-hardening parameters determined.     

Production and properties of brass-base P/M constructional materials. A review

Conclusions The best processing properties are exhibited by brass powders manufactured by the diffusional impregnation technique, using a zinc powder, brass swarf, or a copper-zinc master alloy as a point source. However, as this is a very labor-intensive process, normally preference should be given to melt atomization as a method of manufacture of brass powders. Brass P/M parts produced by the conventional method consisting of pressing a powder and sintering the resultant compacts have porosities of not less than 7–10%, and consequently this method is not widely used for the production of constructional brass parts. The sintering of compacts from copper and copper-zinc master alloy powders gives more stable zinc contents compared with the sintering of compacts from copper and zinc powders; the greatest stability of chemical composition is exhibited by sintered compacts from a homogenized brass powder. The formation of diffusional porosity accompanying the evaporation of zinc may be prevented by performing sintering in the presence of a liquid phase (which appears in the presence of a phosphorus or lead addition), saturating the sintering atmosphere with zinc vapor, and adding carbonates or halides of alkali and rare-earth metals to starting powders. The mechanical properties of materials can be markedly improved by eliminating their porosity. This may be achieved by subjecting porous preforms to hot forging, which enables brass P/M parts to be obtained whose mechanical properties are comparable to those of cast parts.Translated from Eoroshkovaya Metallurgiya, No. 3(255), pp. 56–64, March, 1984.     

Experimental deformation textures of OFE copper and 70:30 brass from wire drawing,compression, and torsion

Inverse pole figures have been made from OFE copper and 70:30 brass samples which were deformed to a von Mises equivalent strain of 1.5 in wiredrawing, compression, and torsion. Measurements were taken from the plane normal to the axis of maximum or minimum principal strain for the cases of tension and compression, respectively. We studied three sections for the specimens deformed in torsion, namely the planes normal to the three cylindrical coordinate axes (Z, R, and π). Our results were consistent with the literature data for both wiredwaring and compression. In wiredrawing we found a duplex fiber texture of [001] and [111] orientations. The amount of the [001] texture was much less for the 70:30 brass. A [011] fiber texture developed in both materials in compression. For the OFE copper, the [011] texture spread toward [113]. In the case of the 70:30 brass there was a spread toward [111]. The inverse pole figures we obtained from the torsion samples had similar trends for both copper and brass. Data from the section taken normal to theR axis showed no distinct preferred orientation. For both materials the Z-section had an increased concentration of [111] poles and a distinct absence of [011] poles. In the case of the copper there was also a slight [001] component. Finally, we found the [011] component in the π-section. This section was also characterized by a lack of [001] or [111] orientations.     

铜基粉末冶金双锥同步器同步环的加工及优化

以-200目电解铜粉和雾化细黄铜粉为原料, 利用喷撒烧结设备、拉伸成锥设备及模具, 研究了铜基粉末冶金双锥同步器同步环的撒粉烧结和拉伸成锥工艺。结果表明, 铜基粉末冶金摩擦材料的孔隙率保持在30%左右, 且孔隙呈细微和均匀分布; 摩擦材料层的平均动摩擦系数为0.081, 静摩擦系数为0.146, 磨耗率为8.70×10-9 cm3/J; 该材料在随钢芯板冷拉伸成锥形时不掉渣, 厚薄均匀, 锥度、圆度及尺寸变化很小, 其原料配方和拉伸成锥工艺可适用与大批量生产。