作　　者： ; ; ; ; ;

机构地区： 北京科技大学

出　　处： 《北京科技大学学报》 1992年第1期1-7,共7页

摘　　要： 采用热天平装置及单个球团加热的方法,测定了含碳球团的还原速度。研究了加热温度、球团配碳量、炉气组成、添加剂、原料种类等对含碳球团的还原速度和金属化率的影响及球团的冶金特性。实验结果表明:含碳球团的软化和熔化温度较高,含碳15％以上的球团在1000～1350℃加热时,在含CO_2较高的高温炉气中也能够实现快速自还原,达到较高的金属化率。该球团的金属化率随加热温度提高而增加。研制出一种含煤25％的冷固结铁矿球团,其单个干球抗压强度已达1000N以上,有良好的冶金性能,可用于竖炉型炼铁设备作冶炼铁水的原料,还原剂焦碳也可用非焦煤代替。 The rates of the reduction of carbon-bearing pellets have been determined with a thermalbalance test instrument and heating method of a single pellet. The effects of heating temperature, carbon contents of pellet, composition of furnace gas, additives, and the kinds of raw materials on the rates of reduction, final metallizing rates and metallurgical characteristics of carbon-bearing pellets have also been investigated. The results of the experi- ments show that the softening temperature and melting temperature of the pellet are higher than coventional pellet's temperature. There is a procedure of gas-releasing when the pellets containing >15%C are heated in the temperature range of 1000℃ to 1350℃.The pellets can be self-reduced rapidly in the furnace gas with a high temperature and high contents of CO2.A high metallizing ratio can be obtained. The final metallizing ratio of pelletes increases with the increase of heating temperature. This new type of pellet with very good metallurgical characters can be used directly as a raw material of ironmaking shaft furnace, in which coke can be replaced by a wide ranges of raw coals.

关 键 词： 含煤球团 冶金特性 炼铁 还原速度

领　　域： [冶金工程]