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- Title
Research on properties and thermal stability mechanism of aluminum-niobium slag.
- Authors
Gong Shuai; Zhao Hui-zhong; Yu Jun; Zhang Han; Tan Liqiang
- Abstract
To develop and utilize aluminum-niobium slag, a kind of non-ferrous metallurgical waste residue produced in the preparation of metal niobium by the aluminothermic reduction method, the chemical composition, phase composition, microstructure and properties of aluminum-niobium slag were studied by ICP, XRD, SEM, TG-DTA and other characterization techniques. The results show that the oxidation of Nb and NbO leads to the poor volume thermal stability of aluminum-niobium slag. After heat treating the aluminum-niobium slag at different temperatures (400 - 1 500 °C), it is found that high temperature pre-firing treatment can effectively solve the problem of poor volume thermal stability of the aluminum-niobium slag. After pre-firing at 1 400 °C or above, the aluminum-niobium slag has stable phase composition and volume change rate as well as the refractoriness >1 790 °C, which meets the basic requirements of refractories for raw materials and lays a good foundation for its resource utilization.
- Subjects
THERMAL stability; THERMAL properties; HEAT treatment; METAL wastes; REFRACTORY materials; SLAG; ALUMINUM-magnesium alloys
- Publication
Refractories / Naihuo Cailiao, 2024, Vol 58, Issue 2, p16
- ISSN
1001-1935
- Publication type
Article
- DOI
10.3969/j.issn.1001-1935.2024.02.005