高炉除尘灰碳质反应性研究

Study on Carbon Reactivity of Blast Furnace Dust

摘要: 先以布袋灰、重力灰、煤粉分别于烧结机尾灰制成含碳球团，进行高温自还原实验。再将布袋灰、重力灰、煤粉进行酸洗后研究其微晶结构，并通过差热设备进行碳的气化反应实验，最后进行动力学计算。结果表明：含碳球团还原后的金属化率为煤粉含碳球团 > 布袋灰含碳球团 > 重力灰含碳球团。酸洗后煤粉w、布袋灰w、重力灰w碳质微晶结构的有序化程度依次增大，气化反应性依次降低。使用均相模型计算的得到布袋灰w、重力灰w和煤粉w的表观活化能分别为136.64 kJ/mol、88.00 kJ/mol和181.12 kJ/mol。

Abstract: First, the bag ash, gravity ash, pulverized coal sintering machine were made of carbon pellets, high temperature self-reduction experiment. The microcrystalline structure was studied after pickling, bagging ash, gravity ash and pulverized coal. The carbonation reaction of the three carbonaceous materials after the pickling was carried out by differential thermal equipment. Finally, the kinetic calculation was carried out. The results show that the rate of metallization after reduction of car-bonaceous pellets is pulverized coal pulverized coal particles > bag ash carbonaceous pellets > gravity gray carbon pellets. The degree of ordering of pulverized coalw, bag ashw and gravitational ashw carbonized microcrystals increased in turn, and the gasification reactivity decreased in turn. The apparent activation energies of bag grayw, gravity grayw and pulverized coalw were 136.64 kJ/mol, 88.00 kJ/mol and 181.12 kJ/mol, respectively, calculated using the homogeneous model.