Properties of Glass-ceramics Prepared from Composite Solid Wastes
Due to the various excellent properties,glass-ceramics have been widely developed and applied in many fields,and there are also many potential application values that need to be explored.The preparation of glass-ceramics from industrial slag and metal-lurgical waste provides a new approach for the comprehensive utilization of solid waste.Coal gangue has the largest emissions among va-rious industrial waste residues,and iron tailings and high carbon chromium iron slag also account for a large proportion of industrial sol-id waste in China.The production of high value-added glass-ceramics using cheap industrial solid waste as the main raw material can reduce pollution,protect the ecological environment,and have good economic and social benefits.This article uses coal gangue,i-ron tailings,and high carbon chromium iron slag as the main raw materials to prepare cordierite glass-ceramics by sintering method.The heat treatment regime of the basic glass was determined using a differential thermal analyzer,and phase analysis and microstructure observation of the sintered product were conducted using X-ray diffraction and scanning electron microscopy.Also,the hardness,acid and alkali resistance,density,and water absorption of the prepared samples were measured.The results showed that the main crystal phase of the prepared glass-ceramics is cordierite,and the various properties of the glass-ceramics are excellent.This study provides useful references for industrial solid waste treatment.
Cordierite glass-ceramicsCoal gangueIron tailingsHigh carbon chromium iron slag
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