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Effect of Coal Size Segregation in Coal Bin on Discharging Coke Cake

机译：煤仓中煤粉偏析对焦炭饼排放的影响

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摘要

For improving the performance of discharging coke cake from oven chambers, the way to increase clearance between coke cake and oven wall near coke side was investigated. To avoid a pushing trouble is needed because this trouble, which has increased gradually with the aging of coke ovens, negatively affects the stable coke production and service life of coke ovens. One of the effective approaches to improve the discharging conditions is to maintain the sufficient clearance especially near coke side because the oven walls around there have been most damaged in aging coke ovens. Therefore enlarging the clearance near coke side was studied. For this objective, it was focused on the way to decrease coal size and bulk density locally by controlling the coal size segregation in coal bin. Firstly, the effects of coal size and bulk density on the clearance were examined at laboratory. Then the effects of the charging conditions of coal blend on the size segregation and the clearance were investigated. As a result, the clearance increased with decreasing the coal size and bulk density. Moreover, the clearance was capable of variation by size segregation. Based on the laboratory-scale study, a commercial plant trial was conducted. Consequently, it was clarified that the discharging behavior was improved by size segregation although the variation of the coal size was smaller than we initially envisioned.
机译：为了提高从炉膛排出焦饼的性能，研究了增加焦饼与焦炭侧附近炉壁之间间隙的方法。需要避免推挤麻烦，因为这种麻烦随着焦炉的老化而逐渐增加，从而对稳定的焦炭生产和焦炉的使用寿命产生负面影响。改善排放条件的有效方法之一是保持足够的间隙，尤其是在焦炭侧附近，因为在老化的焦炉中，其周围的炉壁受到的损坏最大。因此，研究了增大焦炭侧附近的间隙。为了这个目标，它集中于通过控制煤仓中的煤尺寸偏析来局部减小煤尺寸和堆密度的方法。首先，在实验室检查了煤大小和堆密度对清除率的影响。然后研究了混合煤的装料条件对尺寸偏析和清除率的影响。结果，间隙随着煤尺寸和堆密度的减小而增加。此外，间隙能够因尺寸偏析而变化。基于实验室规模的研究，进行了商业工厂试验。因此，尽管煤的大小变化比我们最初设想的要小，但澄清了通过尺寸分离改善了放电性能。

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  • 来源
    《ISIJ international》 |2014年第6期|1228-1234|共7页
  • 作者

    Yusuke DOHI; Koji HANAOKA; Tetsuya YAMAMOTO; Manabu YOKOYAMA; Kiyoshi FUKADA; Takashi MATSUI;

  • 作者单位

    Steel Research Laboratory, JFE Steel Corp., 1 Kokan-cho, Fukuyama, 721-8510 Japan;

    Headquarters, JFE Steel Corp., 2-2-3 Uchisaiwai-cho, Chiyoda-Ku, Tokyo, 100-0011 Japan;

    Steel Research Laboratory, JFE Steel Corp., 1 Kokan-cho, Fukuyama, 721-8510 Japan;

    West Japan Works (Kurashiki), JFE Steel Corp.,1 Mizushima Kawasakidori, Kurashiki, 712-8074 Japan;

    Steel Research Laboratory, JFE Steel Corp., 1 Kokan-cho, Fukuyama, 721-8510 Japan;

    Steel Research Laboratory, JFE Steel Corp., 1 Kokan-cho, Fukuyama, 721-8510 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cokemaking; pushing trouble; coke cake; clearance; size segregation; bulk density;

    机译：炼焦惹麻烦焦炭蛋糕清除;大小隔离;堆积密度;

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