Abstract
The crystallization process of iron-rich glass-ceramics prepared from the mixture of nickel slag (NS) and blast furnace slag (BFS) with a small amount of quartz sand was investigated. A modified melting method which was more energy-saving than the traditional methods was used to control the crystallization process. The results show that the iron-rich system has much lower melting temperature, glass transition temperature (T g), and glass crystallization temperature (T c), which can result in a further energy-saving process. The results also show that the system has a quick but controllable crystallization process with its peak crystallization temperature at 918°C. The crystallization of augite crystals begins from the edge of the sample and invades into the whole sample. The crystallization process can be completed in a few minutes. A distinct boundary between the crystallized part and the non-crystallized part exists during the process. In the non-crystallized part showing a black colour, some sphere-shaped augite crystals already exist in the glass matrix before samples are heated to T c. In the crystallized part showing a khaki colour, a compact structure is formed by augite crystals.
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Wang, Zj., Ni, W., Li, Kq. et al. Crystallization characteristics of iron-rich glass ceramics prepared from nickel slag and blast furnace slag. Int J Miner Metall Mater 18, 455–459 (2011). https://doi.org/10.1007/s12613-011-0462-5
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DOI: https://doi.org/10.1007/s12613-011-0462-5