Abstract:Both coke and anthracite can be used as sintering fuels in the sintering process, the cost performance of anthracite C is almost double that of C of coke due to price factor, which is conducive to economic sintering. Under the condition of raw material and fuel in Panzhihua Steel Vanadium Co., the system test of fuel structure and proportion was carried out and the test results were comprehensively evaluated. Laboratory tests have shown that "25% coke + 75% coal" had the best overall effect, and the "50% coke +50% coal" was the second, but the ratio of these two structures was better than the use of coke or coal alone. The industrial test showed that the comprehensive effect of "15% Coke +85% Coal" was the best, and the "85% Coke +15% Coal" was the second, the two collocation was better than the use of Coke alone. The test found that the synthetical effect of using coal alone was better than using coke alone, the minerals composition and structure and metallurgical properties of sinter were basically unaffected. After excluding the influence factors of a slightly higher ratio of coal and high gangue content, the obvious economy was still reflected, and the comprehensive effect was not affected. Laboratory flue gas component detection showed that the use of coke or coal alone or both matching, with the change of sintering time, its exhaust gas O2, CO, CO2 content curve shape was highly similar, showing the fuel structure and ratio on the sintering process combustion and action mechanism was same or different little, the difference was that the content of exhaust gas composition had a certain difference but not much, The ratio of combustion efficiency and utilization rate φ(CO)/[φ(CO)+φ(CO2)] was similar or had little difference, which indicated that coke and coal can be used interchangeably or in combination to achieve the purpose of economical use of coal.
蒋大均. 燃料结构对烧结性能及综合效果的影响[J]. 钢铁, 2020, 55(2): 31-41.
JIANG Da-jun. Influence of fuel structure on sintering character and comprehensive effect. Iron and Steel, 2020, 55(2): 31-41.
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