The invention relates to a preparation process for solving the problem of
polishing yellow edges of grey glazed bricks. The method comprises the following steps: (1)
powder is prepared: the ball
discharge slurry moisture is 34-36%, the
fineness 325-mesh screen residue is 1.5-2.0%, the flow rate is 50-80S, the pressed
powder moisture is 6.0-6.5%, and the volume weight of the
powder is 0.95-1.0; (2)the powder is aged for 24 hours, pressed, molded and dried at the temperature of 210 DEG C for 2 hours, and is discharged from a
kiln at the temperature of 70-90 DEG C; (3)
grinding and
polishing ofthe
green body are carried out; (4) ground coat is sprayed on the surface of the
green body; (5) ink-jet decoration is carried out: ink sorts: blue, brown, brown, bright red, orange, golden yellow, black, black and gray; (6) transparent
glaze is sprayed on the surface of a
brick body; (7) firing in a roller
kiln at the temperature of 1168-1185 DEG C for 75-82 minutes is carried out; and (8)
polishing is carried out, wherein polishing parameters comprise 20 groups of rough polishing
grinding heads, 16 groups of medium polishing
grinding heads and 20 groups of fine polishing grinding heads.