Abstract: Based on the analysis of imperfection of coke reactivity index (CRI) and coke strength after reaction (CSR) in stimulation of coke thermal properties in blast furnace, CRI and post-reaction thermal properties (PRTP) and their detection methods are developed, including coke solution loss reaction starting temperature, solution loss rate and post-reaction strength in a given solution loss extent, post-heat treatment index and post-heat treatment strength. By analyzing the CRI, CSR and CR-PRTP of seven blast furnace coke samples, the results indicate that the cokes are quite different in the reaction starting temperature, at most, the gap between them is 44℃. The CSR of coke D is 74.1%, but the higher CSR is duo to the lower CRI, so it is more profitable for post-reaction strength in a given solution loss extent to evaluate the ability of coke to resist solution loss degradation. Compared with post-reaction strength in a given solution loss extent, post-heat treatment strength of coke A is decreased by 7.1%. The analysis and comparison indicate that it is available to evaluate the thermal properties of coke with CR-PRTP.

Key words: coke, reactivity, coke strength after reaction, blast furnace

摘要： 通过焦炭反应性(CRI)和反应后强度(CSR)在模拟高炉内焦炭热性质中存在问题的分析，提出了CRI和反应后热性质(PRTP)及其检测方法，指标包括溶损反应开始温度、溶损速率、等溶损率后强度、反应后热处理性和热处理后强度. 7种高炉用焦炭的CRI和CSR及CRI-PRTP的实验研究和分析显示，几种焦炭的反应初始温度有较大差别，最大相差44℃. 焦炭D的CSR为74.1，但较高的CSR主要是其低CRI造成的，用等溶损率后强度能够更好地评定焦炭抵抗溶损劣化的能力. 焦炭A的溶损-热处理后与等溶损率后强度相比，降低幅度达到了7.1%. 研究证明，用CRI-PRTP评定焦炭热性质可行.

关键词: 焦炭, 反应性, 反应后强度, 高炉