摘要
基于炉渣结构共存理论，建立1200～1300℃下CaO-Cu2O-Fe2O3三元渣系组元活度的计算模型，计算并绘制渣中CaO、Cu2O和Fe2O3的等活度曲线，考察碱度B和温度t对组元活度α（CaO）、α（Cu2O）和α（Fe2O3）的影响。结果表明：模型计算值α（Cu2O）与文献实测值α＇（Cu2O）吻合程度高，说明模型能较好地反映该渣系的结构本质；α（Cu2O）呈拉乌尔正偏差，在B=1．54时出现最大值，当B〉1．54时随着B和t的增大而降低，当B〈1．54时趋势正好相反，且受碱度影响更为显著；α（CaO）和α（Fe2O3）分别随CaO和Fe2O，在炉渣中含量的升高而增大，但受温度的影响都不明显。研究结果可用于采用铁酸钙渣系的炼铜新工艺热力学研究。
According to the coexistence theory of slag structure, the activity calculation model for slag system of CaO-Cu2O-Fe2O3 was built from 1 200 ℃ to 1 300 ℃. Then, the activities of CaO, Cu2O and Fe2O3 in the slag were calculated, and their equal activity curves were drawn. The influence of basicity B and temperature t on the activities α（Cu2O）, α（CaO） and α（Fe2O3） was also analyzed. The results show that the calculated α（Cu2O） is in good agreement with the reported measured α＇（Cu2O）, showing that the model can wholly embody the slag structural characteristics. α（Cu2O） departures positively from Raoult values and reaches the maximum value when B is 1.54, then decreases with the increase of B and t when B〉 1.54, but increases when B〈 1.54. α（CaO） and α（Fe2O3） increase with the increasing contents of CaO and Fe2O3 in slag, but change little with change of temperature. The results can be applied to the thermodynamic research of new copper smelting technologies adopting calcium ferrite slag.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2009年第5期955-959,共5页
The Chinese Journal of Nonferrous Metals
基金
国家重大产业技术开发资助项目(20051255)
江西省科技攻关资助项目(20061B0101100)
江西省自然科学基金资助项目(2007GZC0713)
江西省教育厅科研资助项目(GJJ09241)
关键词
铁酸钙渣
共存理论
活度
计算模型
calcium ferrite slag
coexistence theory
activity
calculation model
