Application of Mineral Sizer in Coal Preparation Plants Front-end Pretreatment
When traditional crushing equipment is used to process ROM coal, it generally has limitations such as severe over-crushing, high maintenance costs, and poor compatibility with hard materials, making it difficult to meet the refined requirements of coal preparation plants for the pre-treatment of front-end materials. Mineral Sizer offers professional and efficient solutions to core issues such as the whole crushing of ROM coal, the removal of large gangue, and the control of inlet particle size in coal preparation plants.
Technical features of Mineral Sizer and ROM coal whole particle crushing
A brief description of the working principle of Mineral Sizer
Based on the crushing principle, Mineral Sizer adopts a toothed design and a low-speed high-pressure working mode to achieve precise crushing of ROM coal. Unlike the impact and grinding crushing methods of traditional crushing equipment, Mineral Sizer can crush along the weak sides of the coal structure. While effectively reducing the particle size of the material, it minimizes the occurrence of overcrushing to the greatest extent and avoids the adverse effects of excessive fine mud on subsequent sorting processes.
ROM coal whole particle crushing design
In terms of whole particle crushing, Mineral Sizer can strictly control the maximum particle size of the material entering the coal preparation plant, and stabilize it within the optimal particle size range required for heavy medium separation or jigging. By flexibly adjusting the roller body design and roller height, the particle size of the crushed product can be precisely regulated according to the specific process requirements of the coal preparation plant, ensuring the uniformity of material particle size and creating favorable conditions for the efficient operation of subsequent sorting equipment.
Analysis of Sizer’s Impact on Indicators of Coal Preparation Plants
The influence on the washing and selection efficiency
Mineral Sizer, through precise whole crushing, keeps the particle size of the materials entering the sorting equipment uniform and stable, enabling the sorting machine to always operate within the optimal particle size range and thereby significantly improving the sorting accuracy. Due to the effective control of particle size, the interference of super-large particle materials on the flow field of the sorting medium has been eliminated, enabling coal particles to fully contact and effectively separate from the sorting medium, significantly reducing the mismatch phenomenon during the sorting process. Practical experience has shown that after using Mineral Sizer for front-end pretreatment, the recovery rate of clean coal in the coal preparation plant can be significantly improved, and the washing and selection efficiency can be greatly enhanced, creating higher economic benefits for the enterprise.
The influence on the fluctuation of product ash content
By precisely controlling the particle size of the crushed materials, Mineral Sizer ensures uniform and consistent particle size of the materials entering the sorting system, which is conducive to accurate density sorting by the sorting equipment and reduces the segregation of the sorted products. Under uniform particle size conditions, the settling velocity of coal particles in the sorting medium tends to be consistent, enabling efficient separation based on density differences and avoiding incomplete sorting caused by particle size variations..”
Comparison and Selection of Sizer with Traditional Crushing Equipment
Comparison of features between traditional equipment and Mineral Sizer
Traditional crushers, such as hammer crushers, adopt impact and grinding crushing mechanisms. When processing ROM coal, they have a relatively high over-crushing rate and are prone to generating a large amount of fine sludge. This not only reduces the utilization rate of coal resources but also affects the subsequent sorting effect. The particle size control ability is poor, and the particle size distribution of the crushed product is uneven, making it difficult to meet the fine requirements of the coal preparation plant for the front-end materials. Traditional crushers have poor compatibility with foreign objects in ROM coal. When encountering large pieces of gangue, metals and other hard objects, it is easy to cause equipment damage, requiring the machine to be shut down for manual cleaning, which seriously affects production efficiency. The crushing mechanism of Mineral Sizer has a low over-crushing rate and can retain the effective coal particles to the greatest extent. Its particle size control is precise, which can stably control the maximum particle size of the material and ensure the uniformity of the product particle size.
Reference points for selection
The appropriate tooth profile design should be selected based on the compressive strength, mudization degree and gangue content of ROM coal. According to the processing capacity requirements of the coal preparation plant, determine the roller size and rotational speed of the Mineral Sizer. For coal preparation plants with large processing volumes, models with larger roller widths and diameters should be selected and matched with appropriate rotational speeds to ensure sufficient throughput. At the same time, the gap between the rollers also needs to be adjusted according to the particle size requirements of the subsequent sorting equipment to ensure that the particle size of the crushed product meets the process standards.
Conclusion
As a key equipment for the pre-treatment of materials at the front end of coal preparation plants, Mineral Sizer has successfully achieved the triple goals of ROM coal particle crushing, effective removal of large foreign objects, and stable particle size input, thanks to its unique technical features.
