Cold-compressed solid aggregates for the production of iron-nickel alloys, method for producing the same, and method for producing iron-nickel alloys.

Abstract

The present invention relates to a cold-compressed solid aggregate for producing an iron-nickel alloy, a method for producing the same, and a method for producing an iron-nickel alloy. The present invention is characterized by a cold-compressed solid aggregate having the following mass ratio: 80-95 mass% of laterite ore; 3-10 mass% of at least one binder; and 2-10 mass% of a carbon source. The method for producing the aggregate includes (i) mixing the laterite ore with at least one binder and a carbon source, and (ii) cold-compressing the mixture to form an aggregate. The method for producing an iron-nickel alloy includes (i) mixing the laterite ore with at least one binder and a carbon source; (ii) cold-compressing the mixture to form an aggregate; (iii) pre-reducing the solid aggregate in a furnace with a controlled atmosphere; and (iv) melting the pre-reduced solid aggregate in a furnace with a controlled atmosphere.

Claims

1. A cold-compressed solid aggregate for the production of iron-nickel alloys, 80-95% by mass of laterite ore; 3 to 10% by mass of at least one type of binder; 2-10% by mass carbon source A cold-compressed solid aggregate characterized by containing the following:

2. At least one type of binder, starch; Bentonite The aggregate according to claim 1, characterized in that it is at least one of the following.

3. The aggregate according to claim 1 or 2, characterized in that the laterite ore is an ore originating from the saprolite zone.

4. A method for producing cold-compressed solid aggregates for the production of iron-nickel alloys, A step of mixing 80-95% by mass of laterite ore, 3-10% by mass of at least one binder, and 2-10% by mass of a carbon source; and The process of forming a solid aggregate by cold-compressing the laterite ore, the at least one binder, and the carbon source. A method characterized by including

5. The method according to claim 4, further comprising the step of drying the laterite ore to a moisture content of 10% before the mixing step.

6. The method according to claim 5, characterized in that the method further includes a step of separating the laterite ore with a 5 mm sieve before the drying step.

7. The method according to any one of claims 4 to 6, characterized in that the method further comprises a step of drying the solid aggregate after the step of cold-compressing the mixture.

8. The method according to any one of claims 4 to 7, characterized in that the method includes an additional step of drying the solid aggregate at a temperature of 100 to 120°C for 3 to 5 hours after the compression step.

9. A method for producing an iron-nickel alloy from a cold-compressed solid aggregate, A step of mixing 80-95% by mass of laterite ore, 3-10% by mass of at least one binder, and 2-10% by mass of a carbon source; and A step of forming a solid aggregate by cold-compressing the laterite ore, the at least one binder, and the carbon source; A step of pre-reducing the solid aggregate in a furnace with a controlled atmosphere; and The process of melting the pre-reduced solid aggregate in a furnace with a controlled atmosphere. A method characterized by including

10. The method according to claim 9, characterized in that the step of pre-reducing the solid aggregate in a furnace with a controlled atmosphere is carried out in an induction furnace or a rotary kiln RK.

11. The method according to claim 9 or 10, characterized in that the step of pre-reducing the solid aggregate in a furnace with a controlled atmosphere is performed at a temperature of 1000°C to 1450°C for 25 to 70 minutes.

12. The method according to any one of claims 9 to 11, characterized in that the step of melting the pre-reduced solid aggregate is carried out at a temperature of 1400°C or higher.

13. The method according to claim 9, characterized in that the pre-reduction step and the step of melting the pre-reduction solid aggregate are carried out in the same batch in an induction furnace at a temperature of 1450°C to 1500°C.

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