Invention Grant
- Patent Title: Method and system for producing low carbon ferroalloy from chromite ore
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Application No.: US17523087Application Date: 2021-11-10
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Publication No.: US12000017B2Publication Date: 2024-06-04
- Inventor: Daniel Shaw , James Saville , John Williams , Trevor N. Mustoe
- 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 West Conshohocken
- Agency: Caesar Rivise, PC
- Main IPC: C22B5/04
- IPC: C22B5/04 ; C21D1/74 ; C21D6/00 ; C21D8/12 ; C21D9/00 ; C22B1/24 ; C22C33/04 ; C22C38/18

Abstract:
A method and system for recovering a high yield of low carbon ferroalloy, e.g., low carbon ferrochrome, from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.
Public/Granted literature
- US20220064756A1 METHOD AND SYSTEM FOR PRODUCING LOW CARBON FERROALLOY FROM CHROMITE ORE Public/Granted day:2022-03-03
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