关键词: 铸造焦, 黏土砖, 硅砖, 升温速率, 成块性

Abstract: Coal cakes with dimensions of 500 mm×350 mm×400 mm were prepared using pulverized coal,coke powder,and coal pitch as raw materials,adding 10 mass% of water,and stamp charging.When the furnace temperature was 650 ℃,the coal cakes were placed in single-side heating furnaces,and heated at different heating rates till forming coke,with final coking temperature of 1 050 ℃.The effects of lining materials (clay bricks and silica bricks) and heating rates (0.5,0.6,and 0.7 ℃·h^-1) on the heating rate of the coal cakes and the properties of the formed coke were studied.The results show that due to the better thermal conductivity of silica bricks compared to clay bricks,the coal cakes in the furnace using the silica brick lining have a shorter water vaporization time,and a higher heating rate in the first shrinkage peak stage between 200-600 ℃,which leads to higher internal stress in the coal cakes and a lower coke agglomeration rate.Therefore,when using silica bricks as the wall of coke oven carbonization chambers,the heating rate should be 0.5 ℃·h^-1,while for clay bricks as the wall,the heating rate should be 0.6 ℃·h^-1.

Key words: foundry coke, clay brick, silica brick, heating rate, agglomeration property