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公开(公告)号：US10648057B1
公开(公告)日：2020-05-12
申请号：US16596017
申请日：2019-10-08
申请人： MM Metals USA, LLC
发明人： Daniel Shaw , James Saville , John Williams , Trevor N. Mustoe
摘要： A method and system for recovering a high yield of 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.
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公开(公告)号：US10508319B1
公开(公告)日：2019-12-17
申请号：US16454283
申请日：2019-06-27
申请人： MM Metals USA, LLC
发明人： Daniel Shaw , James Saville , John Williams , Trevor N. Mustoe
摘要： A method and system for recovering a high yield of 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.
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公开(公告)号：US12000017B2
公开(公告)日：2024-06-04
申请号：US17523087
申请日：2021-11-10
申请人： MM Metals USA, LLC
发明人： Daniel Shaw , James Saville , John Williams , Trevor N. Mustoe
CPC分类号： C22B5/04 , C21D1/74 , C21D6/002 , C21D8/1205 , C21D9/0025 , C21D9/0068 , C22B1/24 , C22C33/04 , C22C38/18
摘要： 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.
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4.发明公开公开(公告)号：US20230399718A1
公开(公告)日：2023-12-14
申请号：US18229467
申请日：2023-08-02
申请人： MM Metals USA, LLC
CPC分类号： C22B5/04 , C22C33/04 , C22C38/18 , C22B1/24 , C21D9/0025 , C21D8/1205 , C21D1/74 , C21D9/0068 , C21D6/002
摘要： 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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5.发明公开公开(公告)号：US20240344171A1
公开(公告)日：2024-10-17
申请号：US18756430
申请日：2024-06-27
申请人： MM Metals USA, LLC
CPC分类号： C22B5/04 , C21D1/74 , C21D6/002 , C21D8/1205 , C21D9/0025 , C21D9/0068 , C22B1/24 , C22C33/04 , C22C38/18
摘要： A method and system for recovering low carbon ferrochrome from feed materials including chromite ore and aluminum granules in a chamber of an arc furnace using an aluminothermic smelting process carried out in the presence of an inert gas, e.g., Argon. The aluminothermic smelting process produces a bath of molten low carbon ferrochrome metal with molten slag floating thereon in the chamber. The molten low carbon ferrochrome metal and molten slag are extracted individually and processed to provide a solidified low carbon ferrochrome metal product and a solidified slag particles product, respectively. A method for the recirculation, recovery and reuse of the inert gas, and a system for accomplishing the recirculation, recovery and reuse of the inert gas.
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6.发明授权公开(公告)号：US10683564B1
公开(公告)日：2020-06-16
申请号：US16704015
申请日：2019-12-05
申请人： MM Metals USA, LLC
发明人： Daniel Shaw , James Saville , John Williams , Trevor N. Mustoe
摘要： A system and method for recovering a high yield of low carbon ferrochrome from chromite and low carbon ferrochrome produced therefrom. 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.
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