What are the factors that affect the thermal strength of coke

What are the factors that affect the thermal strength of coke

1. Coke is one of the important raw materials for blast furnace smelting. With the continuous increase of blast furnace volume, the combustion heat generation and indirect reduction function of coke in the blast furnace are partially replaced by the injection of coal powder. At the same time, the low coke ratio leads to an extended residence time of coke in the blast furnace, which increases the dissolution reaction of coke. The skeleton role of coke as a blast furnace material column is further strengthened. The majority of ironmaking workers not only focus on the ash, sulfur, and cold strength in coke, but also increasingly pay attention to the thermal strength of coke.

2. The influence of coal quality on the thermal strength of coke plays a dominant role, and coal with good colloid flowability gives coke a thicker pore wall, which can still maintain a good pore structure after reacting with CO2. The content of organic inert components. The alkaline oxide content of ash in coal has a significant catalytic effect on the reaction between coke and CO2. Taking Xinjiang Aiweiergou coal as an example, the coal has good cohesion, and the cold strength of coke produced by coking alone is still acceptable, but the thermal strength is significantly different from the coke produced by Pingdingshan Town Chengdi coal of the same coal type.

3. Formed coal technology can increase the density of the coal pile in the furnace, increase the proportion of weakly sticky coal, and improve the quality of coke by adding formed coal. Based on the actual use of Baosteel for many years, the relationship between the thermal strength of coke and the ratio of briquette and crushing strength.