Invention Publication
- Patent Title: METHOD AND SYSTEM FOR PRODUCING LOW CARBON FERROCHROME FROM CHROMITE ORE AND LOW CARBON FERROCHROME PRODUCED THEREBY
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Application No.: US18229467Application Date: 2023-08-02
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Publication No.: US20230399718A1Publication Date: 2023-12-14
- Inventor: Daniel Shaw , Adriaan Jacobus Van Der Merwe , Ottmar Aloys Lange
- Applicant: MM Metals USA, LLC
- Applicant Address: US PA Plymouth Meeting
- Assignee: MM Metals USA, LLC
- Current Assignee: MM Metals USA, LLC
- Current Assignee Address: US PA Plymouth Meeting
- Main IPC: C22B5/04
- IPC: C22B5/04 ; C22C33/04 ; C22C38/18 ; C22B1/24 ; C21D9/00 ; C21D8/12 ; C21D1/74 ; C21D6/00

Abstract:
A method and system for recovering a high yield of low carbon ferrochrome metal from chromite ore and low carbon ferrochrome metal produced by the method. A thermochemistry calculated mixture of feed materials including aluminum granules, burnt limestone, and chromite ore are provided into a DC plasma arc furnace. The aluminum granules are produced from aluminum scrap. The feed materials are heated upon entering the furnace free board through a feed mix injection system, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxides in the chromite ore to produce molten low carbon ferrochrome metal with molten slag floating thereon. The molten low carbon ferrochrome metal is extracted, solidified into ingots, crushed into coarse pieces or fines of low carbon ferrochrome metal product. The molten slag is extracted, quenched and solidified into slag particles product.
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