FUNDAMENTAL EXPERIMENT ON REFINING OF LOW GRAD COPPER SCRAP.

低品位废铜精炼基础实验。

• 批准号: 08650860
• 负责人: TAKEDA Yoichi
• 金额: $ 1.34万
• 依托单位: IWATE UNIVERSlTY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650860/
• 关键词: Copper scrap; Recycling; Oxidation smelting; Liquid separation; Solubility; Slag; Distribution ratio; Distribution of impurity; 乾式精製; 相分離; クラックス; リラックス

In order to refine a high copper grade scrap by oxidation, I have carried out melting experiments in which slag and copper metal containing impurities are oxidizing by blowing air, and the expcrimental results are as follows :(1) Iron, zinc, cobalt and nickel of which oxides have higher melting temperatures than copper are removable as their solid oxides without any flux.(2) There are the best oxygen potential to remove zinc, iron, cobalt and tin which have big affinities with oxygen. When we make over-oxidation, these impurities become a stable in molten copper due to the interaction between them and oxygen, that is high content in copper, and removability of the impurity are reduced.(3) It is possible to remove some amount of nickel and bismuth whose affinities with oxygen are close to that of copper, but it is not enough to eliminate these impurities clearly.I have made fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. A mixture of iron, copper and carbon are melted in a carbon crucible at 1453K.The top layr which is rich in iron and the bottom layr which is rich in copper are clearly separated in the crucible. The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1% Fe-4.7% Cu-4.2% C and 96.7% Cu-3.3% Fe. Sixty percent of copper recovery from 10% Cu containing scrap, 80% of the recovery from 20% Cu scrap and 90% of the recovery from 30% Cu scrap were achieved by employing the phase separation on copper enrichment from scrap.

为了用氧化法精炼高品位废杂铜，进行了用鼓风氧化渣和含杂质金属铜的熔炼实验，实验结果如下：（1）铁、锌、钴、镍的氧化物熔化温度比铜高，可以不用任何熔剂以固体氧化物的形式除去。(2)对于与氧亲和力大的锌、铁、钴、锡，存在最佳的氧势。当过氧化时，这些杂质由于与氧的相互作用而成为铜液中的一种稳定物，即铜液中的高含量杂质，降低了杂质的去除率。(3)从含铜废铁中分离出与氧的亲和力接近的镍和铋是可能的，但不足以完全除去这些杂质。在1453 K的碳坩埚中熔化铁、铜和碳的混合物，在坩埚中富铁的顶层和富铜的底层明显分离。Fe-Cu-C系合金的可锻性间隙为91.1% Fe-4.7% Cu-4.2% C和96.7% Cu-3.3% Fe。采用相分离法从含铜10%的废钢中富集铜，铜的回收率为60%，含铜20%的废钢中回收率为80%，含铜30%的废钢中回收率为90%。

项目成果

Katsunori Yamaguchi, Yoichi Takeda: "Copper Enrichment of Scrap by Phase Separation in Liguid Cu-Fe-C system" Tokyo Symposium on Recycling andTreutment of Metals. 41-46 (1997)

Katsunori Yamaguchi、Yoichi Takeda：“在液态 Cu-Fe-C 系统中通过相分离富集铜”，东京金属回收与处理研讨会。

Y.Takeda: "Arsenic Distribution in Molten Phases Relating Copper Smelting" Environment & Innovation in Mining and Mineral Technology. (1998)

Y.Takeda：“与铜冶炼相关的熔体相中的砷分布”环境

武田 要一: "溶融精製" 資源と素材. 113・12. 952-957 (1997)

武田洋一：“熔化精炼”资源和材料。113・12（1997）。

Y.Takeda: "Arsenic Distribution in Molten Phases Relating Copper Smelting" Enrironment&Innoration in Miningand Mineral Technology. (1998)

Y.Takeda：“与铜冶炼相关的熔体相中的砷分布”环境

Katsunori Yamaguchi, Yoichi Takeda: "Copper Enrichment of Scrup by phase Separation in Liquid Cu-Fe-C System" Tokyou Symposium on Recycling and Treatment of Metuls. 41-46 (1997)

Katsunori Yamaguchi、Yoichi Takeda：“在液体 Cu-Fe-C 系统中通过相分离富集铜”东京金属回收和处理研讨会。