Requirements for the Coal Quality Used in the Blast Furnaces
In the process of producing steel, the blast furnace is one of the most important parts. It works offline by melting the materials, such as coke and ore, and then turning them into liquid steel. The performance of the blast furnace is highly reliant on the quality of the coal used to feed the furnace. Therefore, there are certain requirements for the coal quality used in a blast furnace.
The most important quality requirement for coal used in a blast furnace is low sulfur content. Sulfur is an undesirable element in the coal because it can contaminate the molten material and create an impure product. Therefore, coals with a high sulfur content should not be used. The sulfur content in coals should be kept below 2%.
The second quality requirement for coal used in a blast furnace is a low ash content. The ash content in coal is largely determined by its chemical composition, which can make it difficult to control. The ash content in coal should be as low as 0.1%. It is important to note that, if the ash content is too high, the molten material may become clogged and may not be able to flow easily through the blast furnace.
The third quality requirement is that the coal must be of a certain size, as too small or large coal may cause the furnace to become clogged. The most suitable coal size is between 0.6mm and 6mm, and coal larger than 6mm should be avoided.
Finally, the fourth quality requirement for coal used in a blast furnace is its combustibility. The coal being used should have a low ignition temperature and should burn evenly. Poorly burning coal could cause a decrease in the efficiency of the blast furnace.
In conclusion, coals used in a blast furnace need to meet certain requirements such as a low sulfur content, a low ash content, a certain size range, and good combustibility. These requirements help ensure that the coal is of high enough quality to provide a safe, continuous operation of the blast furnace.
