Analysis of the differences in coke thermal properties testing

Abstract

Coke thermal properties affects the operation of blast furnaces, but currently there are certain issues with the accuracy of the results(CRI&CSR), which affects the determination of the quality of coke. Using the coke of enterprise as the experimental sample and base on the Chinese standard as the experimental conditions, comparative-experiment is carried out under two different temperature modes: constant center temperature of 1100 °C and constant heating temperature of 1100 °C, next, by simulating the ore-coke experimental under blast furnace conditions, the reliability of CRI&CSR for comparative-experiment is demonstrated. The research conclusion is as follows: there are significant differences of CRI&CSR of different coke in comparison-experiment, according to thermodynamic analysis, the reason is that thermal compensation determines the degree of absorption heat of coke solution loss affects the experimental results, which leads to the deviation. The difference in deviation is due to the varying degree to which the solution loss reaction rate of different coke is affected by temperature, the ore-coke experimental shows that the reactivity of coke, CSL (Coke Solution Loss), and the strength after reaction, CSRCSL, is a consistent trend with constant center temperature method, therefore the constant center temperature method can simulate the solution and degradation behavior of coke in blast furnaces more accurately, and can evaluate the metallurgical performance of coke more accurately.