Abstract: In order to reduce the pollution of electrolytic manganese residue and the toxicity of the heavy metal manganese, the preparation of ceramic tiles was studied by using electrolytic manganese residue as the main raw material. The basic formulas were obtained in terms of the CaO-Al_2O_3-SiO_2 ternary system phase diagram, and then they were optimized through the orthogonal design. In the optimal formula, the mass fraction of electrolytic manganese residue reached 40%. The samples with augite and johannsenite as their main crystal phases, whose water absorption was 1.86%, were produced through the lower-temperature and quick-sintering technology: the temperature was 1079 ℃, and the sintering time was 30 minutes. The samples' main technical performance complied with the BⅠb standard of GB/T 4100-2006 'Ceramic tiles'. Experimental results showed that the heavy metal manganese was in the johannsenite's crystal lattice and became a component of the johannsenite's crystal structure. Therefore, less toxicity of manganese will be released into the environment.

Key words: electrolytic manganese residue;ceramic tiles;orthogonal test;lower-temperature and quick- sintering