Considering the characteristic of selective heating of microwave and the treatment of titania-bearing BF slag, a mathematical model for the heating of a slag specimen is developed. The temperature distribution in the ...Considering the characteristic of selective heating of microwave and the treatment of titania-bearing BF slag, a mathematical model for the heating of a slag specimen is developed. The temperature distribution in the specimen is studied by numerical simulation. The temperature in the center of the cylindrical slag specimen is the highest and the temperature decreases when the radius increases rapidly. In this case, the temperature rising rate decreases with heating time rapidly, and it tends to zero when the heating time is up to 150 s.展开更多
Through the numerical modeling of temperature field for Blast Furnace (BF) lining and stave coolers, it can tell designers how to design a cooler which the hot surface temperature is less than its critical temperature...Through the numerical modeling of temperature field for Blast Furnace (BF) lining and stave coolers, it can tell designers how to design a cooler which the hot surface temperature is less than its critical temperature under very high heat flux. Applying low heat re- sistance lining and staves cooler to BF is good for a layer of slag skull frozen on the hot surface of cooling stave. As long as the slag skull can stand, the furnace wall is stable and the heat loss of furnace does not increase. This is the basic principle for designing long campa- ignship BF.展开更多
以铜镉渣浸出液为原料,首先考察均匀电场和非均匀电场对提取金属镉的影响,再对非均匀电场的提镉工艺进行研究。单因素法获得非均匀电场提镉最佳工艺条件是:电流密度200 A m^(2)、温度40℃、脉冲占空比30%、溶液pH=3.0、电源频率200 Hz...以铜镉渣浸出液为原料,首先考察均匀电场和非均匀电场对提取金属镉的影响,再对非均匀电场的提镉工艺进行研究。单因素法获得非均匀电场提镉最佳工艺条件是:电流密度200 A m^(2)、温度40℃、脉冲占空比30%、溶液pH=3.0、电源频率200 Hz、反应时间2.5 h。最后,在不同温度和不同溶液pH下,对镉锌硫酸盐溶液进行循环伏安扫描,探究锌置换提取镉的阳极反应机理。结果表明,升高温度能促进镉的还原析出,减小pH不利于锌对镉的置换反应。铜镉渣浸出液中镉的提取回收对实现镉的源头减排与污染控制有重大意义。展开更多
基金This study was financially supported by the National Basic Research Program of China (No.2007CB613503).
文摘Considering the characteristic of selective heating of microwave and the treatment of titania-bearing BF slag, a mathematical model for the heating of a slag specimen is developed. The temperature distribution in the specimen is studied by numerical simulation. The temperature in the center of the cylindrical slag specimen is the highest and the temperature decreases when the radius increases rapidly. In this case, the temperature rising rate decreases with heating time rapidly, and it tends to zero when the heating time is up to 150 s.
文摘Through the numerical modeling of temperature field for Blast Furnace (BF) lining and stave coolers, it can tell designers how to design a cooler which the hot surface temperature is less than its critical temperature under very high heat flux. Applying low heat re- sistance lining and staves cooler to BF is good for a layer of slag skull frozen on the hot surface of cooling stave. As long as the slag skull can stand, the furnace wall is stable and the heat loss of furnace does not increase. This is the basic principle for designing long campa- ignship BF.
文摘以铜镉渣浸出液为原料,首先考察均匀电场和非均匀电场对提取金属镉的影响,再对非均匀电场的提镉工艺进行研究。单因素法获得非均匀电场提镉最佳工艺条件是:电流密度200 A m^(2)、温度40℃、脉冲占空比30%、溶液pH=3.0、电源频率200 Hz、反应时间2.5 h。最后,在不同温度和不同溶液pH下,对镉锌硫酸盐溶液进行循环伏安扫描,探究锌置换提取镉的阳极反应机理。结果表明,升高温度能促进镉的还原析出,减小pH不利于锌对镉的置换反应。铜镉渣浸出液中镉的提取回收对实现镉的源头减排与污染控制有重大意义。
