ABSTRACT The effectiveness of blast furnace (BF) operation is closely linked with the coke quality. Coke is the only solid material in the furnace that supports the iron-bearing burden and provides a permeable bed necessary for slag and metal to pass down into the hearth and for hot gases to pass upwards in BF. Therefore hot strength of coke i.e. coke strength after reaction (CSR) is one of the key parameters for efficient operation of BF. In this paper effect of ash chemistry (basic to acid ratio), plastic range (PR) and mean max reflectance of coal blend on the coke quality at Bhilai Steel Plant discussed. Two different regions were identified, in the first region BAR is the controlling factor while in the other region PR was a dominating factor for CSR. A new prediction model for CSR was also developed using plant data.

中文翻译：

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塑性范围和灰分化学对焦炭热强度性能的影响

摘要 高炉（BF）运行的有效性与焦炭质量密切相关。焦炭是炉子中唯一支撑含铁炉料的固体材料，并为炉渣和金属向下进入炉膛以及热气在高炉中向上通过提供必要的渗透床。因此，焦炭的热强度，即反应后焦炭强度（CSR）是高炉高效运行的关键参数之一。本文讨论了灰分化学（碱酸比）、塑性范围（PR）和混煤的平均最大反射率对 Bhilai 钢铁厂焦炭质量的影响。确定了两个不同的区域，在第一个区域 BAR 是控制因素，而在另一个区域 PR 是 CSR 的主导因素。还使用工厂数据开发了一种新的 CSR 预测模型。