The invention relates to the technical field of raw
coal impurity removal, and provides a control method for raw
coal impurity removal. The control method comprises the following steps that firstly, raw
coal is subjected to preliminary screening, fine coal
powder is filtered out, meanwhile, coal flow is evenly distributed, and the raw coal with the fine coal
powder filtered out enters a next-stage working procedure; secondly, in the
metal impurity removal process, in the raw coal transportation process,
metal impurities existing in the raw coal are detected and removed in combination with a material recognizer, and the raw coal with the
metal impurities removed is conveyed to the next stage of impurity removal and screening process; then, screening of the coal flow is achieved in the impurity removal and screening procedure, the coal flow meeting the blanking requirement falls and is divided under the action of gravity and
kinetic energy, and large coal briquettes and impurities which cannot fall off are further screened and subjected to impurity removal; and finally, coal briquettes carried in the impurities are screened out, and the impurities are conveyed to a recycling box. According to the control method,
iron metal impurities such as anchor rods in the raw coal can be removed, large impurities can also be removed, and the quality of the raw coal is effectively improved.