Hydraulic transport of highly concentrated water-coal slurries

Abstract

When improving the technology of preparation at the first stage of production, water-coal slurries (WCS) by their energy indicators are not inferior to such traditional types of energy fuels as oil or gas, as they belong to the hydrocarbon group of energy raw materials. Since most coal mines are located at considerable distances from industrially developed regions, the issues of hydraulic transportation of prepared CCS are of paramount importance. According to their physical and mechanical properties the CCP are non-Newtonian fluids, hydraulic transportation of which in the most favorable modes can be provided only in full study of the dependence of the rheological properties of suspensions on the coarseness of coal particles and their volume content. Based on the analysis of experimental data obtained in the laboratory of hydraulic transport of ores and ore products it is proposed to consider HPC as a Newtonian fluid and define the non-Newtonian properties by the Rabinovich correction with a structural number for calculation of rheological parameters of HPC. Adequacy of the obtained calculation formulas in the future should be confirmed by additional studies.