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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，铜吹炼渣中易析出固体磁铁矿。通过多种试验研究，研制出了一种既能防止磁铁矿沉淀，又能获得良好转化性能的新型铜吹炼渣.根据铁饱和时的氧分压对氧化亚铜的影响，确定了铜液存在下FeOx-SiO2-CaO渣系中浮氏体和磁铁矿铁氧化物饱和时的渣系组成。结果表明，在1573 K的氧分压下，硅含量大于25%、石灰含量大于15%、氧化铁含量小于60%的渣系可形成均匀的液相。铜在渣中以氧化物形式溶出损失与渣组成、氧分压和温度的关系也很明确.为了解在炼铜前的造渣阶段形成含石灰的硅酸铁渣的优越性，进行了渣与高冰铜的平衡实验。随着石灰含量的增加，FeO_x-SiO_2-CaO渣中铜的损失减少，砷、锑等有害元素的脱除率提高，在与某铜冶炼厂工程师讨论了如何将含石灰渣用于铜吹炼后，在工业转炉上进行了试验。