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砖瓦厂烧砖用外投煤有烟煤、褐煤和无烟煤3种,常用的是烟煤.就烟煤而言,因产地不同,品种较多,所以煤质也多有差异.如要达到外投煤的合理选购与使用,除了解煤的主要成分及作用外还要视煤质的差异作恰当工艺处理,这样才能有效地降低煤耗和提高烧结砖质量和经济效益.l煤质的主要成分及作用烟煤品种较多,其煤质优劣以煤的成分为依据,主要是固定碳、挥发分、水分和灰分.1.1 固定碳固定碳是煤中主要的可燃物.它和空气中的氧结合后,即能燃烧放出大量的热.煤中含碳的多少,是决定煤质好坏的主要因素.含碳量高的煤,热值也高,而且燃烧时间也长.
There are 3 types of bituminous coal, lignite and anthracite used for brick firing in brickyards. Bituminous coal is commonly used. As for bituminous coal, due to the different origins and varieties, there are many differences in coal quality. The reasonable purchase and use, in addition to understanding the main components and role of coal but also depending on the difference in coal quality for proper processing, so as to effectively reduce coal consumption and improve the quality and economic benefits of sintered bricks. l The main components of coal and The role of bituminous coal is more, its coal quality is based on the composition of coal, mainly fixed carbon, volatile matter, moisture and ash. 1.1 fixed carbon fixed carbon is the main combustible material in coal. It is combined with oxygen in the air. After that, it can burn a lot of heat. The amount of carbon in coal is the main factor that determines the quality of coal. Coal with high carbon content has high calorific value and long burning time.