Technological Indicators of Coking Metallurgical Coke
Coking metallurgical coke is a kind of fuel used for fuel in the production of iron and steel. It is made of coal by high temperature carbonization or thermal decomposition, and the object formed is called coke. The main ingredients in coke are carbon and ash, and the main combustible components in coke are fixed carbon and volatile matter. Performance indicators of coking metallurgical coke include the following:
1. Fixed carbon: It is a part of combustible matter that remains after coking, and its quality indicates the combustion performance of coking metallurgical coke. Generally, the fixed carbon content should be high. Generally, coking metallurgical coke with a carbon content of 85% -92% is qualified products.
2、Volatile matter: It is a combustible matter that volatilizes when coking and calcination. Generally, the lower the volatile matter, the better the combustion performance of the coke. Generally, the volatile matter should not exceed 10%.
3、Ash content: Ash is a combustible matter with low ignition point, which is a substance that cannot be volatilized when coking, and is an important indicator of quality. The residual remains after combustion when coking. Generally, the ash content should not exceed 10%.
4. Coke strength: After coking, due to the texture of the coke, it has anti-crushing strength. To evaluate the coking performance of coking metallurgical coke and the size of fuel, the strength of coking metallurgical coke should not be lower than the prescribed standard. Generally, the strength should not be lower than 80%, and the qualified coke is generally greater than 80 -90%.
5、Porosity: The pores of coke formed by air in the coal during coking and calcination are called porosity, porosity has a certain influence on the uniformity of coal and air flow in the blast furnace system. The porosity of metallurgical coke should not exceed 12%, and the qualified products generally reach 8-10%.
The above are the assessment indicators of coking metallurgical coke. It is an important part of the cast iron produced in the production of iron and steel, and its quality directly affects the quality of the produced cast iron. Therefore, it is necessary to pay attention to the quality of coking metallurgical coke when producing. At the same time, in the choice of coke, it is necessary to combine the specific production process and choose the suitable coke varieties, which will improve the production efficiency and reduce the production cost.
