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The development of shaped coke technology

2009-03-20View Original

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The development of shaped coke technology: The raw materials used in conventional coking techniques are composed of coking coals, that is, the traditional method of blending four types of coal – gas coal, fat coal, coking coal, and lean coal – for coking. China is rich in coal resources, but their distribution is uneven. Coking coals and fat coals, which are essential for producing coke, are relatively scarce. Anthracite and non-caking coals found in certain areas cannot be used to produce coke at all; they can only be utilized as domestic fuel or industrial briquettes. In recent years, in order to address the shortage of high-quality coking coal as well as the need for coke specific to casting purposes, various domestic research and production institutions have undertaken studies on high-quality type coke. However, there are few specialized studies on the technology for producing type coke from coke dust or weakly caking coals. Therefore, I have chosen the technology for processing type coke from coke dust or weakly caking coals as my research topic. It has the following characteristics: 2.1 By making use of abundant non-coking coal resources and advanced furnace designs, production can be carried out with only a small amount of additives added ; 2.2 Making full use of the low ash, low sulfur, and high carbon characteristics of non-coking coal helps to improve the quality of the products ; 2.3 The produced product pieces have uniform size, and this size can be adjusted according to customer requirements, which facilitates customer selection ; 2.4 The product has a high yield rate, with a product yield as high as 98% ; 2.5 Transformed resource advantages into economic advantages, expanding the product market. 3 Basic conditions for producing coke from coking coal or weakly bonded coal. The construction of industrial coke plants involves technical fields such as civil engineering, mechanical automation, chemistry, and thermodynamics ; Molding additives involve polymer chemistry, colloid chemistry, and crystallography ; The coking and combustion of shaped coke involve combustion science, thermodynamics, high-temperature thermochemistry, catalytic activation theory, and redox mechanisms. At present, the cokemaking plants already built in China often fail to achieve industrial-scale production due to reasons such as mismatched equipment and furnace designs, inappropriate choice of shaping additives, a lack of theoretical foundations, and insufficient process research. In light of this, my research team has, through years of dedicated research, developed a set of production technologies for shaped coke with its own unique characteristics. These technologies make use of the latest fifth-generation carbonization furnaces and shaping processes, along with GYC-type composite additives; mixing, shaping, and carbonization are then carried out to complete the process. Carbonized coke does not increase ash content or reduce fixed carbon; its product quality is the same as that of coke ; The additive does not contain chemical elements such as magnesium, phosphorus, aluminum, or iron. Suitable for use in industries such as metallurgy, foundry, chemicals, fertilizers, and calcium carbide as a substitute for coke. 4 Production process of coke powder or weakly bonded coal-based coke: Raw materials – crushing – screening – addition of binder – mixing – shaping – carbonization – storage and transportation of coke. 4.1 Production process for coke powder or weakly bonded coal coke 4.1.1 First, some impurities are screened out; the fine powder is used directly, while lump coal is crushed and ground before being used. 4.1.2 The prepared raw materials are fed into a dryer for dehydration, drying, and heating. 4.1.3 Add the heated pulverized coal to a high-power mixer, incorporate a binder, and then mix and knead it.

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