What is coke

What is coke

Coke is a solid fuel that is hard, porous, has high calorific value, and is made from high-temperature carbonization of coal. It is mostly used in ironmaking. Coke is usually divided into metallurgical coke (including blast furnace coke, cast coke, ferroalloy coke, etc.), gasification coke and calcium carbide coke according to its use. Features: Hard, porous, high calorific value.

Physical properties of coke

Coke physical properties include coke screening composition, coke bulk density, coke true relative density, coke relative density, coke porosity, coke specific heat capacity, coke thermal conductivity, coke thermal stress, coke ignition temperature, coke thermal expansion coefficient, coke shrinkage , coke resistivity and coke permeability, etc.

The physical properties of coke are closely related to its mechanical strength and thermal strength at room temperature and its chemical properties.

The main physical properties of coke are as follows:

1. True density is 1.8-1.95g/cm3;

2. Apparent density is 0.88-1.08g/cm3;

3. Porosity is 35-55%;

4. Bulk density is 400-500kg/m3;

5. The average specific heat capacity is 0.808kj/(kg/k)(100℃), 1.465kj/(kg/k)(1000℃);

6. Thermal conductivity is 2.64kj/(m/h/k) (normal temperature), 6.91kg/(m/h/k) (900℃);

7. Ignition temperature (in air) is 450-650℃;

8. The low calorific value of dry ashless base is 30-32kj/g;

9. Specific surface area is 0.6-0.8m2/g.