Method for the production of aluminum-silicon alloys
AssigneeAluminum Company of America
InventorsSubodh K. Das, Richard A. Milito
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Abstract
A method of producing an aluminum-silicon type alloy from alumina-silica bearing materials comprises providing the silica and alumina bearing materials in a mix having a weight ratio of silica to alumina in the range of 0.5 to 1.1. The method further comprises providing a source of carbonaceous material in the mix and carbothermically reducing it to form the aluminum-silicon alloy.
Claims14
A method of carbothermically reducing alumina and silica bearing materials to produce aluminum-silicon alloys comprising:
- a. providing alumina and silica bearing materials in a mix having a weight ratio of silica to alumina in the range of 0.5 to 1.1;
- b. providing in said mix a source of carbonaceous material for effecting reduction of said alumina and silica in said mix;
- and
- c. carbothermically reducing alumina and silica contents of said mix to produce an aluminum-silicon alloy.
A method of carbothermically producing an alloy containing aluminum and silicon from an alumina and silica bearing ore wherein said ore contains not more than 35 wt.% alumina and 25 to 65 wt.% silica, the method comprising:
- a. grinding said ore to a size in the range of -14 to -200 mesh (Tyler Series);
- b. treating said ground ore in an acid solution to remove alkali and alkaline earth metal;
- c. adjusting the silica and alumina content of said ore to provide a weight ratio of silica to alumina in the range of 0.5 to 1.1;
- d. providing 15 to 30 wt.% carbon to effect reduction of said alumina and said silica;
- and
- e. carbothermically reducing alumina and silica content of the mix to produce said aluminum-silicon alloy.
A method of carbothermically producing an aluminum-silicon alloy from anorthosite, the method comprising:
- a. grinding said anorthosite to a size in the range of -14 to -200 mesh (Tyler Series);
- b. treating said ground anorthosite in an acid solution to remove alkali and alkaline earth metals;
- c. adjusting the silica and alumina content of said ore by adding bauxite thereto to provide a weight ratio of silica to alumina in the range of 0.5 to 1.1, said bauxite being ground to a size in the range of -14 to -200 mesh (Tyler Series);
- d. providing 15 to 30 wt.% carbon to effect reduction of said alumina and said silica;
- and
- e. carbothermically reducing alumina and silica content of the mix to produce said aluminum-silicon alloy.
A method of carbothermically producing an alumina-silica alloy from an alumina and silica bearing ore wherein said ore contains 40 to 55 wt.% alumina and 0.1 to 15.0 wt.% silica, the method comprising:
- a. grinding said ore to a size in the range of -14 to -200 mesh (Tyler Series);
- b. adjusting the silica content of said ore by adding a source of silica thereto to provide a mix having a weight ratio of silica to alumina in the range of 0.5 to 1.1;
- c. providing 15 to 30 wt.% carbon to effect reduction of said alumina and said silica;
- and
- d. carbothermically reducing alumina and silica content of the mix to produce said aluminum-silicon alloy.
Dependencies are inferred from the claim text.