1995 Fiscal Year Final Research Report Summary
Quantitative Analysis on Sulfidic and Oxidic Dissolutions of Copper in Matte Smelting Slag
| Project/Area Number |
05650721
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Metal making engineering
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| Research Institution | Iwate University |
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Principal Investigator |
TAKEDA Yoichi Iwate University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30125603)
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| Project Period (FY) |
1993 – 1995
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| Keywords | Copper smelting / Slag / Matte / Slag Loss / Matte Smelting / Oxidic Dissolution / Sulfidic Dissolution / Activity |
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| Research Abstract |
In order to estimate sulfidic and oxidic dissolution of copper in matte smelting slags, following equilibrium experiments have been performed. The experimental results and heat balance of copper smelting suggest that the optimum copper content in matte produced in matte smelting furnace is 70%.
(1) The equilibrium experiments between FeO_X-CaO-SiO_2 slag and molten copper have been carried out from 1200 to 1400ﾟC to determine the activity coefficient of CuO_<0.5> Consequently, we can calculate the oxidic copper solubility in the FeO_X-CaO-SiO_2 slag from the experimental results. The activity coefficient varies from 1 to 15 depending on the slag composition.
(2) The experimental results of the slag-matte-copper metal under iron saturation lead to the activity coefficient of CuS_<0.5> in the Cu-Fe-S-O matte and the relation between sulfur content in slag and the activity coefficient of CuS_<0.5> in slag.
(3) The copper solubility in the slag equilibrated with matte have been measured under a corrent of 10% SO_2. The sulfidic and oxidic dissolutions of copper are estimated from the experimental results of 1,2 and 3.
4. Heat balance of copper smelting has been calculated. The optimum copper content in matte produced in matte smelting furnace is 70% in view of energy consumption and copper loss in slag.
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Research Products
(8 results)
