water coal slurry

The main factors affecting the concentration of water-coal slurry include coal quality characteristics, particle size distribution, additives, fluxes, etc. The relationship among the particle size, viscosity, and concentration of coal slurry: these three factors influence one another. When there are more large particles in the coal slurry, the concentration is relatively high while the viscosity is low; however, such slurry settles easily and does not disperse well ； It has many small particles, a low concentration, high viscosity, stable coal slurry, and good atomization. Therefore, the coal slurry is required to have a reasonable particle size distribution. Effect of additives: Stabilizing the viscosity of coal slurry is the basis for increasing the concentration of water-coal slurry. However, when grinding various types of coal, the use of additives is the main measure to maintain stable slurry viscosity. The higher the concentration of water-coal slurry, the greater its viscosity; conversely, a lower viscosity of the water-coal slurry indicates a lower concentration. During production, based on the characteristics of the available coal types, selecting appropriate additives and the optimal amounts of these additives is crucial for reducing the viscosity of the water-coal slurry, as well as for improving its concentration, flowability, and stability. Effect of flux: At the same solid content, the addition of a flux during the preparation of water-coal slurry improves both the fluidity and stability of the slurry. Therefore, for the pulping process, the addition of a flux has no negative effect and even improves the pulp-forming property to some extent. "When the coal slurry remains stationary under sealed conditions in a container, the water content will separate out; the coal particles will sink, with a layer of water on the surface. The coal particles at the bottom will become dry and form hard deposits... It is advisable to try using a different solvent.