ABSTRACT

Coke reactivity index and coke strength after reaction traditionally evaluated by reacting coke with carbon dioxide in standard condition. Several testing standard/methods viz., American society for testing and materials, Japan Industrial Standard, Bureau of Indian Standards, and International Organization Standard exists, which are used worldwide to measure the hot strength of metallurgical coke. In the Indian operation of Iron and steel plants, coke strength after reaction is a vital coke quality parameter for assessing the relative strength of coke for the blast furnace-efficient operation. The mentioned testing methodology is lengthy and takes significant time (~7 h) to complete a single test. Consequently, it needs to develop a method for the coke reactivity index, predicting almost real-time data. A newly developed methodology by infrared gas analyzer was used for developed and validated with coke oven plant coke samples. Result confirmed that the predicted and measured coke CRI with the Nippon Steel Corporation method has a strong positive relationship (R² = 0.92). The results also confirmed the interrelationship between the predicted and actual coke CSR. The developed model can provide a real-time coke reactivity index and estimate the coke CSR within 10 min of reaction time.

摘要

焦炭反应性指数和反应后焦炭强度传统上通过焦炭与二氧化碳在标准条件下反应来评价。存在多种测试标准/方法，即美国测试和材料协会、日本工业标准、印度标准局和国际组织标准，这些标准/方法在全球范围内用于测量冶金焦的热强度。在印度的钢铁厂操作中，反应后的焦炭强度是评估高炉高效操作的焦炭相对强度的重要焦炭质量参数。上述测试方法很长，并且需要大量时间（约 7 小时）才能完成一次测试。因此，它需要开发一种焦炭反应性指数的方法，预测几乎实时的数据。红外气体分析仪新开发的方法用于开发和验证焦炉植物焦炭样品。结果证实，用新日铁方法预测和测量的焦炭 CRI 具有很强的正相关关系（R²  = 0.92)。结果还证实了预测的焦炭 CSR 与实际焦炭 CSR 之间的相互关系。所开发的模型可以提供实时焦炭反应性指标，并在反应时间 10 分钟内估算焦炭 CSR。