石灰石与石灰在高FeO渣中的溶解速度研究

Research on the dissolution rate of limestone and lime in high FeO slag

以边长为10 mm的石灰石立方体和石灰立方体为试验样品,在1 300,1 400,1 500℃下,研究温度对石灰石和石灰在高FeO预熔渣中溶解速度的影响,同时对比了不同温度下石灰石和石灰溶解速度。结果表明,试验条件下,石灰石的溶解速度总体明显快于石灰;且温度升高,两者的溶解速度均有所增加,温度由1 300℃升高至1 400℃时,溶解速度均增加1倍左右;不同温度下,石灰石和石灰在高FeO预熔渣中的溶解约有10~30 s的"滞止期",由于石灰石溶解吸热,期间其溶解速度低于石灰;"滞止期"后,石灰石的溶解速度大于石灰。

The effects of temperature on the dissolution rate of limestone and lime were studied in this paper,and their dissolution rates in pre-slag containing high FeO were also compared at 1 300,1 400 and1 500 ℃,using a length of 10 mm limestone cube and lime cube as the test sample.The results showed that the dissolution rate of limestone was obviously faster than that of lime under the experimental conditions.The dissolution rate increased with the temperature,it would double when the temperature increased from1 300 ℃ to 1 400 ℃.There was a stagnation period lasting about 10 to 30 seconds during the dissolution process of limestone and lime at different temperatures,and which the dissolution rate of limestone was lower than lime due to its heat absorption.After the stagnation period,the dissolution rate of limestone was greater than that of lime.