# US 4,400,207 A · Method of producing metal alloys

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- Number: US 4,400,207 A
- Document ID: US4400207A
- Status: Granted
- Kind: A
- Application number: 06/377,035
- Filed: 1982-05-11
- Granted: 1983-08-23
- Earliest claimed: 1981-05-13
- Assignees: Continental Alloys S.A.
- Inventors: Aloyse Tanson
- Web page: https://patentgrep.com/patent/US4400207A

## CPC

- C22B 1/248: of metal scrap or alloys
- C21C 7/0006: {Adding metallic additives}
- C22B 1/24: Binding; Briquetting {; Granulating}
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- C21C: PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

## Abstract

The pulverulent metal oxide, especially molybdenum oxide is mixed, to increase the metal conversion, with a stoichiometric quantity of finely divided ferrosilicon. This mixture is combined with about 5% by weight bentonite as a binder and agitated with about 3 weight % water and formed into briquettes with the aid of a conventional briquetting unit. To facilitate an exact metering of the additive of the metal oxide to the steel melt, the smallest caliber possible briquettes are produced.

## Claims

### Claim 1

A process for preparing a pulverulent metal oxide as an alloying additive to a steel melt, which process consists essentially of the steps of mixing the oxide with a stoichiometric quantity of finely divided ferrosilicon, combining the mixture with about 5% by weight bentonite as a binder and with about 3% by weight water, agitating the mixture, and shaping the agitated mixture to briquettes.

### Claim 2 (depends on 1)

The method defined in claim 1 characterized in that to facilitate precise metering, small caliber briquettes are produced.

### Claim 3 (depends on 1, 2)

The product manufactured according to the process of claim 1 or claim 2.

### Claim 4

A method of producing an alloyed steel which comprises the steps of:
(a) forming a steel melt covered by a slag;
(b) preparing briquettes of an alloying metal by intimately mixing stoichiometric proportions of finely divided ferrosilicon and a dust-form oxide of an alloying metal, combining the resulting mixture with about 5% by weight bentonite and about 3% by weight water, and briquetting the resulting mixture; and
(c) introducing the briquettes produced in step (b) into the melt formed in step (a) to cause the ferrosilicon of said briquettes to react with said metal oxide and form silicon oxide, thereby releasing said metal into said melt, said silicon dioxide passing into said slag.

### Claim 5 (depends on 1, 4)

The method defined in claim 1 or claim 4 wherein said metal oxide is molybdenum oxide.

### Claim 6

A method of producing a molybdenum-alloy steel which comprises the steps of:
(a) forming a steel melt covered by a slag;
(b) preparing briquettes of MoO.sub.3 by intimately mixing stoichiometric proportion of 3 moles of finely divided ferrosilicon and 2 moles of dust-form MoO.sub.3, combining the resulting mixture with about 5% by weight bentonite and about 3% by weight water, and briquetting the resulting mixture; and
(c) introducing the briquettes produced in step (b) into the melt formed in step (a) to cause the ferrosilicon of said briquettes to react with said MoO.sub.3 and form silicon oxide, thereby releasing molybdenum metal into said melt, said silicon dioxide passing into said slag.