# US 2020/0399723 A1 · A process for manufacturing self-reducing pellets/briquettes from bag house dust mixed with carbon to be used in steelmaking furnaces

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- Number: US 2020/0399723 A1
- Document ID: US20200399723A1
- Status: Published application
- Kind: A1
- Application number: 16/611,579
- Filed: 2018-05-10
- Published: 2020-12-24
- Earliest claimed: 2017-05-10
- Assignees: Sabic Global Technologies B.V.
- Applicants: Sabic Global Technologies B.V.
- Inventors: Narottam BEHERA; Mohammed Abdulwahab TAYEB; Mohammed SAMMAN
- Web page: https://patentgrep.com/patent/US20200399723A1

## CPC

- C21B 13/008: {Use of special additives or fluxing agents}
- C22B 1/24: Binding; Briquetting {; Granulating}
- C22B 1/245: with carbonaceous material for the production of coked agglomerates
- C22B 7/02: Working-up flue dust
- Y02P 10/20: Recycling
- C21B: MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00)
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Bag house dust is combined with a carbon source and shaped into pellets or briquettes and used to recycle valuable metals present in the bag house dust.

## Claims

### Claim 1

A solid composition adapted for use as a feed stock in steel making furnaces comprising;
(i) a baghouse dust comprising iron oxide and at least 1% zinc by weight; and
(ii) a carbon source;
wherein said solid composition is in the form of a briquette or pellet

### Claim 2 (depends on 1)

The solid composition of claim 1, wherein the product does not comprise either or both of ferrous chloride and ferrous sulfate amount that alters the properties of the composition as a feed stock in steel making furnaces.

### Claim 3 (depends on 1)

The solid composition of claim 1, wherein the carbon source comprises greater than 50% carbon by weight.

### Claim 4 (depends on 1)

The solid composition of claim 1, wherein the carbon source comprises at least one member selected from the group consisting of anthracite, graphite, coal, coke, petcoke, coal tar pitch, tar, tar, molasses and decanter sludge.

### Claim 5 (depends on 1)

The solid composition of claim 1, wherein the iron oxide is iron (II) oxide (FeO), iron (III) oxide (Fe2O3), iron (II,III) oxide (Fe3O4, Fe5O6, Fe5O7), or mixtures thereof.

### Claim 6 (depends on 1)

The solid composition of claim 1, wherein the zinc is zinc oxide (ZnO), or any other zinc containing oxide, zinc ferrite, or mixtures thereof.

### Claim 7 (depends on 1)

The solid composition of claim 1, further comprising from greater than 0% up to 15% by weight of an additive.

### Claim 8 (depends on 7)

The solid composition of claim 7, wherein the additive comprises at least one member selected from the group consisting of lime, calcium chloride, silica, limestone, clay, iron grindings, steel grindings, iron borings, steel borings, iron turnings and steel turnings.

### Claim 9 (depends on 1)

The solid composition of claim 1, wherein the baghouse dust comprises greater than 30% iron oxide by weight.

### Claim 10 (depends on 1)

The solid composition of claim 1, wherein the baghouse dust comprises 30% to 70% iron oxide by weight.

### Claim 11

A briquette or pellet adapted for use as a recycled feed stock in electric arc and/or basic oxygen furnaces, the briquette or pellet comprising;
(i) 60 to 90% by weight of a bag house dust comprising iron oxide and zinc, wherein the iron oxide comprises 30 to 70% by weight of the bag house dust;
(ii) 3 to 20% by weight of a carbon source; and
(iii) 0 to 15% by weight additive.

### Claim 12 (depends on 11)

The briquette or pellet of claim 11, wherein the product does not comprise either or both of ferrous chloride and ferrous sulfate.

### Claim 13 (depends on 11)

The briquette or pellet of claim 11, wherein the carbon source comprises greater than 50% carbon by weight.

### Claim 14 (depends on 11)

The briquette or pellet of claim 11, wherein the carbon source comprises at least one member selected from the group consisting of anthracite, graphite, coal, coke, petcoke, coal tar pitch, tar, tar, molasses and decanter sludge.

### Claim 15 (depends on 11)

The briquette or pellet of claim 11, wherein the additive comprises at least one member selected from the group consisting of lime, calcium chloride, silica, limestone, clay, iron grindings, steel grindings, iron borings, steel borings, iron turnings and steel turnings.

### Claim 16 (depends on 11)

The briquette or pellet of claim 11, wherein the iron oxide comprises at least one member selected from the group consisting of iron (II) oxide (FeO), iron (III) oxide (Fe2O3), and iron (II,III) oxide (Fe3O4, Fe5O6, Fe5O7).

### Claim 17 (depends on 11)

The briquette or pellet of claim 11, wherein the zinc is zinc oxide (ZnO), or any other zinc-containing oxide, zinc ferrite, or mixtures thereof.

### Claim 18 (depends on 13)

The briquette or pellet of claim 13, wherein the additive comprises at least one member selected from the group consisting of lime, calcium chloride, silica, limestone, clay, iron grindings, steel grindings, iron borings, steel borings, iron turnings and steel turnings.

### Claim 19 (depends on 13)

The briquette or pellet of claim 13, wherein the iron oxide comprises at least one member selected from the group consisting of iron (II) oxide (FeO), iron (III) oxide (Fe2O3), and iron (II,III) oxide (Fe3O4, Fe5O6, Fe5O7).

### Claim 20 (depends on 13)

The briquette or pellet of claim 13, wherein the zinc is zinc oxide (ZnO), or any other zinc-containing oxide, zinc ferrite, or mixtures thereof.