The Effect of Copper Bearing Particles Liberation on Copper Recovery from Smelter Slag by Flotation

The impact of the liberation of copper bearing particles on copper recovery in the flotation has been the subject of research in this paper. Tests have shown that grinding of material highly impacts the recovery rate in the flotation process. Results of flotation of smelter slag samples with different contents of grain size fraction ?74 µm: 50%, 60%, 70%, 80%, and 90%, have shown that by an increasing the content of the ?74 µm fraction in the feed, the recovery of copper was increasing as well. The highest recovery rate of copper was obtained with 90% of grain size fraction ?74 µm in the feed. The microscopic analysis of concentrates have shown that increased content of grain size fraction ?74 µm, was followed by increased contribution of liberated particles in the 0 to 70 µm fraction, while the contribution of middlings had been decreasing.     

贵溪某粘土矿选矿试验研究

本文对江西贵溪某粘土矿进行了分级、沉降、漂白等试验研究,并针对该矿矿源特点给出了实用性强、投资少、见效快的加工工艺方案。     

贵溪冶炼厂铜冶炼系统技术改造工程管理实践

通过对江铜贵溪冶炼厂铜冶炼系统改造工程项目实施过程的介绍，总结了贵冶三期项目经理部在项目建设中，运用科学的管理方法，从而保证了工程质量，缩短了工期，降低了工程成本。     

Spatiotemporal reconstruction of lead contamination using tree rings and organic soil layers

An atmospheric dispersion model predicting ground-level concentrations from a point source of metal emissions (Murdochville smelter) was calibrated on tree rings in black spruce (Picea mariana Mill. B.S.P.) in order to reconstruct the spatial and temporal Pb-contamination pattern in the Gaspé Peninsula (Canada). Model predictions were validated with forest-floor Pb concentrations that resulted from accumulation of this element over the years and that provide a robust spatial-deposition pattern. Atmospheric emission records were also used to verify the good agreement between the smelter emissions and the temporal-information pattern present in tree rings. Tree rings that formed during the period of smelter emissions exhibited Pb concentrations that correlated with those measured in humus. Temporal variability in tree-ring concentrations was closely associated with the smelter emissions, suggesting that black spruce trees were able to record Pb pollution from a point source. However, a time gap of at least 15years must be considered between the emissions and the actual uptake and incorporation of Pb in the tree rings. A decrease in the level of contamination in the area was associated with the decrease in smelting activities, suggesting a natural resilience of the forest ecosystems to the contamination. This study highlights the strong potential for combining dendrochemical, soil, and modeling approaches in environmental research.     

Recovery of fluoride values from spent pot-lining: Precipitation of an aluminium hydroxyfluoride hydrate product

Treatment of spent pot-lining (SPL) from aluminium smelting cells by a two-stage leaching scheme comprising a water wash and an Al³⁺ leach and fluoride recovery as an aluminium hydroxyfluoride product has been studied for extraction of fluoride and then recovery as smelter grade AlF₃. The NaF content of a −1.18 mm size fraction was removed by the water wash, while the more refractory Na₃AlF₆ and CaF₂ were removed by treatment with 0.34 M Al³⁺ solution at 25 °C for 24 h, which yielded an overall fluoride extraction of 76–86 mol%. Mathematical modelling using experimental stability constant data was carried out to predict the effect of combining solutions and identify ways to manipulate the solution equilibria to maximise fluoride precipitation yields. The predictions were then tested experimentally. In the 4.5–5.5 pH range, selective precipitation of fluoride as an aluminium hydroxyfluoride hydrate product was achieved by neutralisation of the combined solutions with addition of 2 M NaOH solution. Higher pH values lead to the co-precipitation of hydrolysed sodium fluoroaluminates. Characterisation of precipitates using X-ray diffraction, scanning electron microscopy coupled with energy-dispersive spectroscopy, thermogravimetric analysis, differential thermal analysis, aluminium and fluoride determination have pointed out both the AlF₂(OH)·1.4H₂O stoichiometry and possible thermal decomposition pathways to yield a dehydrated aluminium hydroxyfluoride product, AlF₂(OH), that could be used for smelter grade AlF₃ production. The kinetics of hydrolysis are such that nucleation dominates while particle growth is restricted. Techniques to allow slow hydrolysis are necessary to form smelter grade AlF₃.     

金隆铜业有限公司废酸处理技术

采用分步硫化沉淀法处理铜、砷含量较高的废硫酸,先用石灰乳中和废硫酸制得石膏,然后用硫化钠分步沉淀铜,砷、控制一级硫化反应ｐＨ值２、氧化还原电位值２００￣２５０ｍＶ,反应温度５０￣６０℃,反应时间２ｈ,优先实现铜的沉淀;控制二级硫化反应ｐＨ值１．５￣２,氧化还原电位０￣５０ｍＶ,实现砷的沉降。铜滤饼返回熔炼系统,砷滤饼堆存。     

贵溪市 2006—2012 年应征入伍青年体格检查调查分析

目的：分析江西省贵溪市2006-2012年应征入伍青年体格检查淘汰率变化趋势,并分析体检中导致淘汰的主要原因。方法采用回顾性的描述性研究方法对2006-2012年贵溪市应征入伍青年体检数量质量报告表进行分析。结果2006-2012年贵溪市应征入伍青年体格检查共淘汰9129人,占79．39％（9129/11499）,且淘汰率呈逐年上升趋势,由2006年的75．61％上升到2012年85．94％。体检项目淘汰率最高的前5项分别为：肝功能异常及乙肝表面抗原阳性1276人、占11．10％,视力不达标1145人、占9．96％,高血压1033人、占8．98％,身高体质量不达标412人、占3．58％,心理健康问题108人、占0．94％,且此5项检查淘汰率均呈逐年上升趋势。结论为提高征兵体检通过率,保证有更多合格兵源输送到部队,提高青年人身体、心理素质是关键。     

贵溪冶炼厂三期扩产工程决策思路和建设方案

江西铜业公司贵溪冶炼厂是中国第一座采用闪速熔炼技术的铜冶炼工厂。在国家产业结构调整 ,鼓励和扶持工艺技术先进、装备水平高、经济效益好的大中型企业的背景下 ,面对近年来不断进步的闪速熔炼技术给铜冶炼工厂的进一步发展带来的新机遇 ,谋划采用新技术 ,挖掘既有设备的潜力 ,以最小的投资对既有工厂装备的改造扩产 ,既是国内外形势的需要 ,也是贵溪冶炼厂自身生存发展的必然。本文分析了贵溪冶炼厂的实际和外部环境 ,介绍了贵溪冶炼厂由 2 0万吨铜 /年生产能力提升到 4 5万吨铜 /年的扩产改造的基本思路、改造原则和主要内容。     

浅析贵冶二期建安工程的合同管理

贵冶二期工程是国家“九五”期间重点工程项目 ,计划投资 15 .3亿元 ,实际完成 12 .9亿元 ,节约资金2 .4亿元。目前 ,生产安全顺行。建安工程是贵冶二期工程实施过程中的重点 ,而建安工程合同管理又是整个工程管理的核心 ,本文就贵冶二期工程的合同管理工作作一显现分析。     

巴基斯坦山达克铜金工程冶炼厂达产达标实践

介绍了巴基斯坦山达克铜金工程冶炼厂的工艺、达产达标生产的组织及技术指标。