The invention relates to a comprehensive resource recycling method for waste
cathode carbon blocks of aluminum cells and belongs to the technical field of comprehensive utilization of waste
solid resources. The method includes the steps that the waste
cathode carbon blocks of the aluminum cells are broken, so that spare particles are obtained; the particles are heated to the temperature of 200-400 DEG C, and flotation is carried out after the temperature is preserved, so that carbon
slag and
electrolyte slag are obtained; the
electrolyte slag is heated to the temperature of 550-800 DEG C, the temperature is preserved, and then
electrolyte powder is obtained; the carbon slag is added into alkali liquor for leaching, filtering is carried out after leaching, and filter residues and filtrate are obtained; the obtained filtrate is heated to the temperature of 60-90 DEG C and then subjected to evaporative
crystallization, a
solid A is separated out, filtering is carried out, and the
solid A and residual fluid are obtained; and aluminum
hydroxide seeds are added into the residual fluid, the mixture is heated to the temperature of 25-60 DEG C, the temperature is preserved, filtering is obtained, and a solid B and
tail fluid are obtained. The method is reasonable in
technical design, high in
processing efficiency, high in matter
recovery rate and recycling utilization ratio, free of secondary
pollution and suitable for large-scale industrial application.