Methods of coal blending

Factors such as coal blending costs, product quality and output, coal inventory levels, current production status, and overall production requirements need to be taken into consideration.

The methods of coal blending are mainly divided into two types: one is blending first and then grinding, and the other is grinding first and then blending. Most organizations use the former nowadays

By considering the quality of coke, the type of clean coal, and the cost of blended coal, it is possible to ensure smooth coke extraction from the coke oven

First, prepare the coal according to the specified mixing ratio, then grind it, and finally send it to the coal loading tower

Formulating a coal blending plan is an important part of the production technology management in coking plants, and it also serves as the basis for the planning and design of such plants. When determining a coal blending plan, the following principles should be followed. (1) It should be adapted to the properties of the coal used, as well as the plant’s coal pretreatment processes and coking conditions; the quality of the coke must meet the specified standards according to the requirements for different types of coke. (2) It is in line with the local coal resource conditions, facilitating the expansion of coking coal sources. (3) Conducive to increasing coking chemical products ； It prevents the lateral expansion pressure generated by coking of the coal material in the carbonization chamber from exceeding the limit load of the furnace walls, thus avoiding difficulties in pushing out the coke. (4) Reducing the average transportation distance of coal sources facilitates the allocation of freight cars, avoids the back-and-forth movement of coal cars, and provides some flexibility under special conditions. (5) The quantity and quality of the coal supplied remain stable, enabling the production of coke that meets quality requirements while also generating significant economic benefits for the enterprise

1. Coal type supply issue: Fully consider the reserves, transportation conditions, and transportation distances of various coal types that can be utilized, in order to assess the feasibility of their supply in the short and long terms. 2. Issues related to product quality and yield: As agreed upon by the relevant parties, there are requirements regarding the quality of coke, the output of chemical products, as well as the conditions in the coal preparation workshops of coking plants and the condition of the coke ovens. 3. After completing the above tasks, select a suitable coal blending formula: consider the grade, cohesiveness, caking property, ash content, sulfur content, and selectivity of various coal types such as QM, FM, JM, SM, 1/3JM, etc. Based on this, assess the suitability of each type of coal for coke production, and then determine the appropriate amount to use of each coal.