Manufacture of Foundry Pig Iron from Copper Smelting Slag
Manufacture of Foundry Pig Iron from Copper Smelting Slag
复制标题
铜冶炼渣制造铸造生铁
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
J. Wang
中科院分区：
文献类型：
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作者：
K. Hwang;Jin;Hyun;C. Ha;Y. Yu;Moo;J. Wang
炼铜渣是铜冶炼过程中产生的副产物，经过冷却、粉碎后得到的工业副产品。炉渣中含有SiO_2、Al_2O_3、CaO等陶瓷，含铁量高(34~45%)，可回收利用。然而，在回收铁的过程中存在许多困难。研究了以铜渣为原料，采用干法熔融还原法制备铸造生铁过程中，反应时间对渣中铁含量的影响。熔炼30分钟后，没有观察到渣中残留的铁。简介炼铜渣是将闪速炉或连续炉熔炼铜过程中产生的副产品--熔渣在水中冷却并粉碎后得到的工业副产品。1)据了解，制造1吨铜产生约2吨熔渣，韩国铜冶炼厂产生约150万吨铜渣。铜渣中不仅含有SiO_2、Al_2O_3、CaO等陶瓷成分，而且含铁量高(35~45%)，可作为制铁原料。3)然而，在韩国，它只是被回收用作路基剂或水泥和砖的添加剂，或者被填埋。近年来，随着全球对环境和资源的日益关注，各种副产品的回收技术正在得到推广，韩国正在适当地处理和回收生产过程中产生的矿渣。4)由于自然资源的枯竭，对替代资源的需求正在增加，但其局限性正在逐渐显现，这表明利用铜渣等副产品的可能性将增加5~7)。到目前为止，人们提出了从铜中回收铁的各种工艺，这些工艺可分为物理分离工艺和干法冶炼工艺。然而，有报道称，物理分离在分离和回收铁方面效果不佳，而干法冶炼工艺由于需要1673K的高温，增加了工艺成本，难以使用。因此，本研究以炼铜渣为原料生产铸造生铁，并分析了反应时间对生铁生产过程中铁含量的影响。
The copper smelting slag is an industrial by-product obtained by cooling and crushing the by-products from the process of smelting copper. Since the slag contains ceramics such as SiO2, Al2O3, CaO, etc. and a large iron content (34~45%), it can be recycled as a resource. However, there are many difficulties in the process of recovering the iron. This study was intended to analyze the effect of reaction time on Fe content in slag in the process of manufacturing foundry pig iron (Fe-Cu) from the copper slag by a dry smelting reduction method. No residual Fe was observed in the slug after 30 minutes of smelting. INTRODUCTION The copper smelting slag is an industrial by-product obtained by cooling molten slag, which is a by-product generated in the process of smelting copper in a flash furnace or a continuous furnace, in water and crushing it.1) It is known that about 2 tons of slag is generated from the manufacture of 1 ton of cooper 2), and about 1,5million tons of copper slag are generated from copper smelters in Korea. The copper slag contains not only ceramic components such as SiO2, Al2O3 and CaO but also a large iron content (35~45%), which can be used as raw material of iron. 3) However, in Korea, it is simply recycled as agent for roadbed or additives for cement and bricks, or is landfilled. With increased global interest in environment and resources in recent years, recycling technologies of various by-products are being promoted, and efforts to treat and recycle slag generated in the production process are appropriately being made in Korea.4) The need for alternative resources due to depletion of natural resource is increasing, but its limitations are gradually appearing, indicating the possibility of utilizing by-products such as copper slag will increase 5~7). Various processes for recovering iron from copper have been proposed up to date and the proposed processes can be divided into physical separation process and dry smelting process. However, it has been reported that the physical separation is not effective in separating and recovering the iron, and the dry smelting process is difficult to use because it requires a high temperature of 1673K and increases the cost of process. Therefore this study was conducted to manufacture the foundry pig iron (Fe-Cu) from copper smelting slag, and to analyze the effect of reaction time on Fe content in the process of manufacturing pig iron.