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我厂高炉车间煤粉制备系统于六九年十月份投产以来,损耗较大,平均损耗率达17.37%,年平均损耗量达6400吨左右,扣除煤屑烘干的水分损失约6%外,制粉过程的实际损耗为4200吨左右,此损耗包括二方面:一是煤矸石和硬质煤的剔除,每年约1200吨;二是煤粉飞损,煤粉随烘煤烟气排入大气,每年约3000吨。不仅浪费能源,而且污染环境。我厂在八二年八月对高炉煤粉制备系统进行改造,改造后的煤粉制备系统工艺流程见图(1)。
Since the pulverized coal preparation system of blast furnace workshop of our factory was put into operation in October, 1999, the loss is large with an average loss rate of 17.37%. The annual average loss is about 6,400 tons. After deducting about 6% The actual loss of milling process is about 4200 tons, the loss includes two aspects: First, the removal of gangue and hard coal, about 1200 tons per year; second is the fly ash, coal dust with the bake into the atmosphere About 3,000 tons per year. Not only a waste of energy, but also pollute the environment. I plant in August 1982 on the blast furnace pulverized coal preparation system transformation, transformation of coal preparation system process shown in Figure (1).