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Development of Iron-silicate Copper Converting Slag to Prevent Magnetite Precipitation

防止磁铁矿沉淀的铁硅酸铜转炉渣的研制

基本信息

批准号：
02555136
负责人：
TAKEDA Yoichi
金额：
$ 1.98万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555136/
关键词：
Magnetite Trouble Silicate Slag Copper Smelting Magnetite Slag Loss Distribution of Minor Element Equilibrium Experiment Activity of Copper Oxide マグネタイト鉄シリケ-トスラグ造銅期マット溶錬連続製銅法酸化溶錬連続製銅脇

项目摘要

Solid magnetite tends to precipitate in copper converting slag under rather high oxygen partial pressure. Several kinds of experiments have been carried out to develop a new copper converting slag which prevents magnetite from precipitating and performs well in converting.1. The slag compositions saturating with iron oxides of wustite and magnetite in FeO_x-SiO_2-CaO slag system under the presence of molten copper were determined from the oxygen partial pressure of iron saturation to cuprous oxide. The result showed that the slag containing up 25% of silica, up 15% of lime and under 60% of iron oxide made homogeneous liquid phase at the oxygen partial pressure of copper converting at 1573K. Also copper dissolution loss in the slag as oxide clarified as relations of slag composition, oxygen partial pressure and temperature.2. Equilibrium experiment between the slag and high grade copper matte was made in order to get information about advantage when the iron silicate slag containing some amount of lime was formed in slag making stage before copper making. Copper loss of in the FeO_x-SiO_2-CaO slag decreased and removal of detrimental elements such as arsenic and antimony improved with increasing in lime content.After discussing with an engineer of copper smelter how we apply this lime containing slag to copper converting, the slag will be tested in a commercial converter.

在较高的氧分压下，固体磁铁矿容易在铜转炉渣中析出。为研制出一种防止磁铁矿析出并具有良好转炉性能的新型铜转炉渣，进行了多种试验。从铁饱和到氧化亚铜的氧分压测定了FeO_x-SiO_2-CaO渣系中存在熔融铜的浮思体和磁铁矿氧化铁饱和渣的组成。结果表明，在1573K铜转炉的氧分压下，含硅量高达25%、石灰量高达15%、氧化铁含量低于60%的渣形成了均匀的液相。同时阐明了铜在炉渣中作为氧化物的溶解损失与炉渣成分、氧分压和温度的关系。为了解含适量石灰的硅酸铁渣在制铜前的制渣阶段形成的有利条件，进行了渣与优质铜锍的平衡实验。随着石灰含量的增加，FeO_x-SiO_2-CaO渣中铜的损失率降低，砷、锑等有害元素的去除率提高。在与铜冶炼厂的工程师讨论了如何将含石灰渣应用于铜转化后，将在工业转炉中进行试验。