Method for increasing the chrome to iron ratio of chromites products
AssigneeRessources Minieres Pro-Or Inc.
InventorsMario Bergeron, Marc Richer-Lafleche
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Abstract
A method for increasing the chrome to iron ratio of a chromite product selected from the group consisting of ore and ore concentrate comprising the steps of mixing the chromite product with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is selected to induce the selective chlorination of iron; and chlorinating the mixture in the presence of CO at a temperature sufficient to induce the formation of a thin film of a melt around the chromite product and at a temperature able to promote the selective chlorination of iron, whereby an iron impoverished chromite product is yielded having an increased chromite to iron ratio as compared to that of the chromite product.
Claims22
A method for increasing the chrome to iron ratio of a chromite product selected from the group consisting of ore and ore concentrate comprising the steps of
- a. mixing the chromite product with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is selected to induce the selective chlorination of iron;
- and
- b. chlorinating the mixture in the presence of CO at a temperature sufficient to induce the formation of a thin film of a melt around the chromite product and at a temperature able to promote the selective chlorination of iron,
- whereby an iron impoverished chromite product is yielded having an increased chromite to iron ratio as compared to that of the chromite product.
A method for increasing the chrome to iron ratio of a chromite product selected from the group consisting of ore and ore concentrate comprising the steps of
- a. mixing the chromite product with NaCl so that a mixture is produced having about 5% to about 10% NaCl w/w;
- and
- b. chlorinating the mixture in the presence of CO at a temperature sufficient to induce the formation of a thin film of a melt around the chromite product and at a temperature able to promote the selective chlorination of iron,
- whereby an iron impoverished chromite product is yielded having an increased chromite to iron ratio as compared to that of the chromite product.
A method for extracting iron from a chromite product selected from the group consisting of ore and ore concentrate comprising the steps of
- a. mixing the chromite product with at least one salt;
- and
- b. chlorinating the mixture in the presence of CO at a temperature sufficient to induce the formation of a thin film of a melt around the chromite product so as to promote the chlorination of iron,
- whereby an iron impoverished chromite product is yielded.
Dependencies are inferred from the claim text.