Water consumption calculation methodology in the design of clay mineral washing systems

Abstract

The results of physical modeling indicate the existence of an optimum specific water consumption for clay mineral washing, any deviation from which reduces the efficiency of the process. It has been established that the optimum water consumption for the washing process depends on the properties of the clay material and its ability to disperse. It has been found that the washing process is affected by the initial dispersed phase structuring concentration of the material in the washing water. With higher specific water consumption values, process efficiency initially improves, but then changes to a downward trend (after passing the peak consumption value). It is noted that peak efficiency values are observed when the clay component concentration in the washing water reaches the solid phase sedimentation stability threshold for the clay material. The article contains recommendations on establishing the threshold initial dispersed phase structuring concentration. Experimental and analytical modeling was used to propose a method and a formula for calculating the optimal amount of water when designing clay mineral washing processes for washing trommels and log washers. Adjustment coefficients to be used with the formula were identified for each machine type and size and for various initial material moisture values. The actual linear correlation coefficients for the clay mineral washing water consumption formula were established, to be used with scrubbers, scrubber trommel screens, and various types of log washers. Actual inspection data for clay minerals washing and disintegration systems were used to develop recommendations for the selection of equipment types depending on the system feed material properties.