Method for preparing high-strength ceramic wall material from papermaking causticized white mud residues

The invention discloses a method for preparing a high-strength ceramic wall material from papermaking causticized white mud residues. The method comprises the following steps of: (1) adding papermaking causticized white mud residues and fly ash to a forced mixer, stirring, after the papermaking causticized white mud residues and fly ash are uniformly mixed, adding red brick powder or fired clay to the forced mixer, and uniformly stirring to obtain a mixture; (2) by selecting a brick former, adding the mixture obtained in the step (1) to a former die to obtain formed brick blanks; (3) piling the formed brick blanks in a stock yard with favorable ventilation conditions for dewatering and solidification until the brick blanks have constant quality and initial compression strength over 1 MPa;and (4) and conveying the dewatered and solidified brick blanks into a brick kiln for calcining, keeping the temperature and cooling in the kiln to a room temperature so as to obtain the high-strength ceramic wall material. The method provided by the invention is favorable for greatly decreasing the water content of the causticized white mud residues before calcination and decreasing the burning heat consumption and the production cost, a formed test piece can be easily and practically calcined in a low-cost common brick kiln, and a ceramic wall material which has high higher compression strength and can substitute clay bricks can be obtained through selecting suitable parameters for the calcination process.