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US 11,447,420 B2Granted
Method of treatment of bauxite residue, solid obtained by this method and bauxite treatment process including this method of treatment of the bauxite residue
AssigneePurgonpl Group Limited
InventorsJames Patrick Sherry, John Bowles, David Shanahan, Stephen Jennings, Geoffrey Salt
Life of this patent
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Abstract
A method of treatment of bauxite residue resulting from a Bayer process of bauxite treatment in order to produce a solid product. The method comprises mixing a quantity of the bauxite residue (1) with a quantity of a glass material (2) to form a mixture. Then, compressing the mixture (4) to form a green body, and sintering (5) the green body. After cooling, the sintered green body thereby provides the solid product.
Claims12
A process of bauxite treatment comprising:
- receiving bauxite;
- measuring the proportion of one or more target substance(s) within the chemical composition of the received bauxite, the target substance(s) being a substance(s) selected from:
- arsenic (As), mercury (Hg), molybdenum (Mo), chromium (Cr), lead (Pb), cadmium (Cd), selenium (Se), chloride (CI—);
- processing the received bauxite according to a Bayer process of bauxite treatment and therefrom producing a bauxite residue;
- and
- treating the bauxite residue by mixing a quantity of the bauxite residue with a quantity of a glass material to form a mixture;
- compressing the mixture to form a green body;
- sintering the green body;
- and
- cooling the sintered green body thereby to produce the solid product;
- wherein the quantity of a glass material, and/or the sintering temperature, and/or the sintering period of time are determined according to the measured proportion of the one or more target substances within the chemical composition of the received bauxite.
8 more elements
Dependencies are inferred from the claim text.