Preparation and chromatic performance of black ceramic tiles from chromium slag, copper slag and silicon manganese slag
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Chromium slag, copper slag and silicon manganese slag are solid waste generated in industrial production. The recovery ofvaluable elements (Fe, Cr, Mn, etc.) in the waste slag to produce black ceramic tiles can enhance the utilization value of thesesolid waste and solve the problem of environmental resource constraints. In this study, the industrial waste of chromium slag,copper slag and silicon manganese slag were used as raw materials to prepare black ceramic tiles. The results showed thatthe best color of ceramic tiles appeared at the molar ratio of Fe/Cr/Mn=3:2:1, sintering temperature of 1150 oC, holding timeof 45 min and cooling in the furnace. The values of L*, a*, b* and C* are 26.2, 1.0, 0.2, and 1.02, respectively. Meanwhile,the compressive strength and Cr6+ leaching concentration of the ceramic tiles at the optimal process parameters were 162.61MPa and 0.97 mg/L, respectively, which met the national standards. The chromaticity coordinates of prepared black ceramictiles are very near to the point with a saturation of 0, indicating that it is feasible to use chromium slag, copper slag andsilicon manganese slag to prepare black ceramic tiles.
Abstract
Chromium slag, copper slag and silicon manganese slag are solid waste generated in industrial production. The recovery ofvaluable elements (Fe, Cr, Mn, etc.) in the waste slag to produce black ceramic tiles can enhance the utilization value of thesesolid waste and solve the problem of environmental resource constraints. In this study, the industrial waste of chromium slag,copper slag and silicon manganese slag were used as raw materials to prepare black ceramic tiles. The results showed thatthe best color of ceramic tiles appeared at the molar ratio of Fe/Cr/Mn=3:2:1, sintering temperature of 1150 oC, holding timeof 45 min and cooling in the furnace. The values of L*, a*, b* and C* are 26.2, 1.0, 0.2, and 1.02, respectively. Meanwhile,the compressive strength and Cr6+ leaching concentration of the ceramic tiles at the optimal process parameters were 162.61MPa and 0.97 mg/L, respectively, which met the national standards. The chromaticity coordinates of prepared black ceramictiles are very near to the point with a saturation of 0, indicating that it is feasible to use chromium slag, copper slag andsilicon manganese slag to prepare black ceramic tiles.