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通过模拟高炉内炉料气-固反应的试验装置进行了氯化钙对高炉综合炉料高温同化过程的影响试验。对试验后的矿石和焦炭进行分拣、拍照,分别测定铁矿石和焦炭的质量,并采用扫描电子显微镜测试技术分析试样中的微观结构。研究结果表明,在高温区(>1 000℃),随着温度的升高,铁矿石发生软化熔融。氯化钙对铁矿石失重率的影响不大,其失重率和变化规律与未经氯化钙处理的铁矿石相当。高温区,随着温度的升高,经氯化钙处理的焦炭的失重率提高。1 000℃时,焦炭的失重率约为8.3%,1 500℃时,焦炭的失重率约为24.4%。随着反应温度升高,焦炭气孔率降低,强度变差。
The effect of calcium chloride on the high temperature assimilation process of blast furnace integrated charge was tested by simulating the gas-solid reaction charge in the blast furnace. The ore and coke after the test sorting, taking pictures, respectively, the determination of the quality of iron ore and coke, and the use of scanning electron microscopy test sample microstructure. The results show that the iron ore softens and melts with the increase of temperature at high temperature (> 1000 ℃). Calcium chloride has little effect on the weight loss rate of iron ore, and the rate of weight loss and its variation are comparable with that of iron ore without calcium chloride treatment. At high temperature, as the temperature increases, the weight loss rate of calcium chloride treated coke increases. At 1 000 ℃, the weight loss of coke is about 8.3%. At 1500 ℃, the weight loss of coke is about 24.4%. As the reaction temperature increases, the coke porosity decreases and the strength deteriorates.