As a chemical engineer with a focus on coal processing and utilization, I'd like to clarify that the process of making coke from coal is a complex chemical transformation that involves several steps, and it's crucial to note that this process is not related to the production of illicit drugs, which is what the term "coke" might be mistakenly associated with in some contexts. The coke we are discussing here is a metallurgical coke, which is used primarily in the iron and steel industry.

Step 1: Selection of Coal
The first step in the production of coke is the selection of appropriate coal. The ideal coal for coke production is bituminous coal, which has a high carbon content and low levels of sulfur and ash. This type of coal is chosen because it has the right properties to undergo the necessary chemical changes during the coking process.

Step 2: Crushing and Blending
Once the right type of coal is selected, it is crushed into smaller pieces to increase the surface area, which facilitates the subsequent chemical reactions. The crushed coal is then blended to ensure a uniform composition, which is important for the consistency of the final coke product.

Step 3: Coking Process
The coking process itself involves heating the coal in the absence of air, a process known as carbonization. This is typically done in a coke oven, which is a large, enclosed chamber. The coal is heated to temperatures between 1,000°C and 1,100°C, causing the coal to decompose and release volatile gases. The remaining solid material is the coke.

Step 4: Gas Collection and Utilization
During the coking process, a variety of gases are produced, including methane, hydrogen, and carbon monoxide. These gases are collected and can be used as a source of energy or as raw materials for the production of chemicals.

Step 5: Cooling and Handling
After the coking process is complete, the hot coke is removed from the oven and is allowed to cool. It is then crushed again to a suitable size for use in the blast furnace.

Step 6: Quality Control
Finally, the coke is tested for quality to ensure it meets the required specifications for use in the steel industry. It should be hard, porous, and have a high carbon content with few impurities.

The resulting coke is a grey, hard, and porous solid that is essential for the production of iron and steel due to its high carbon content and its ability to withstand high temperatures without decomposing.

read more >>

Coke is a fuel with a high carbon content and few impurities, usually made from coal. It is the solid carbonaceous material derived from destructive distillation of low-ash, low-sulphur bituminous coal. Cokes made from coal are grey, hard, and porous.read more >>