Abstract

A pellet comprising C-grade iron fines and a binder; a method of producing said pellet, comprising mixing the C-grade iron fines and the binder to form a mixture and agglomerating the mixture to form a pellet; and a method of producing steel, comprising heating a pellet comprising C-grade iron fines and a binder in an electric arc furnace.

IPC Classes  ?

• C22B 1/24 - BindingBriquetting
• C21C 5/52 - Manufacture of steel in electric furnaces
• C22B 1/243 - BindingBriquetting with binders inorganic
• C22B 1/244 - BindingBriquetting with binders organic

Abstract

The invention relates to a process for producing a pellet and a pellet obtainable by said process. The process comprising (i) providing particulate material selected from a carbonaceous material, metal, metal ore, and mixtures thereof; and an inorganic binder comprising a metal silicate, to form a mixture; (ii) compressing the mixture to form a pellet; and (iii) curing the pellet by contacting the pellet with gaseous carbon dioxide. A pellet comprising a particulate material selected from a carbonaceous material, metal, metal ore, and mixtures thereof; silica; and a metal carbonate is also described.

IPC Classes  ?

• C22B 1/24 - BindingBriquetting
• C22B 1/243 - BindingBriquetting with binders inorganic
• C22B 1/244 - BindingBriquetting with binders organic
• C04B 18/02 - Agglomerated materials

Abstract

A method of producing a pellet, the method comprising the steps of: providing a particulate substrate selected from a metal ore, metal ore-containing waste, metal fines, iron residue, iron filings, mineral waste, carbonaceous material, arc furnace waste or combinations thereof; mixing the particulate substrate with a binder formulation comprising at least one binding material to form a substrate mixture; applying pressure to the substrate mixture to induce the formation of a hydrogel; and forming an agglomerate wherein water is present to facilitate hydrogel formation. Together with a pellet obtained by the method of the invention.

IPC Classes  ?

• B09B 3/20 - Agglomeration, binding or encapsulation of solid waste
• B09B 3/21 - Agglomeration, binding or encapsulation of solid waste using organic binders or matrix
• B09B 3/24 - Binders with plastic
• B09B 3/32 - Compressing or compacting
• B09B 3/35 - Shredding, crushing or cutting
• C22B 1/24 - BindingBriquetting
• C22B 1/243 - BindingBriquetting with binders inorganic
• C22B 1/244 - BindingBriquetting with binders organic
• B09B 3/25 - Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
• B09B 3/27 - Binding by sodium silicate, e.g. cement or water glass

Abstract

A pellet including C-grade iron fines and a binder; a method of producing said pellet, including mixing the C-grade iron fines and the binder to form a mixture and agglomerating the mixture to form a pellet; and a method of producing steel, including heating a pellet including C-grade iron fines and a binder in an electric arc furnace are all provided.

IPC Classes  ?

• C22B 1/24 - BindingBriquetting
• C21C 5/52 - Manufacture of steel in electric furnaces
• C22B 1/243 - BindingBriquetting with binders inorganic
• C22B 1/244 - BindingBriquetting with binders organic

Abstract

A method of producing a pellet, which may comprise the steps of: mixing an organic binder with water to form an organic hydrogel binder; mixing the hydrogel with a particulate substrate selected from a metal ore, metal ore containing waste, metal fines, iron residue, iron filings, mineral waste, carbonaceous material, arc furnace waste or combinations thereof to form a substrate mixture; and forming an agglomerate. Alternatively, the method may comprise the steps of: providing a wet particulate substrate selected from a metal ore, metal ore containing waste, metal fines, iron residue, iron filings, mineral waste, carbonaceous material, arc furnace waste or combinations thereof; mixing the wet particulate substrate with an organic binder to form a wet substrate mixture; resting the wet substrate mixture to allow the formation of a hydrogel of the organic binder around the particulate substrate; and forming an agglomerate.

IPC Classes  ?

• C22B 1/243 - BindingBriquetting with binders inorganic
• C22B 1/244 - BindingBriquetting with binders organic
• C22B 1/248 - BindingBriquetting of metal scrap or alloys
• B09B 3/20 - Agglomeration, binding or encapsulation of solid waste

Abstract

The invention relates to the use of fibres, often in briquettes, and to the production of briquettes, for instance from coal, metal or metal ores. Typically the briquettes are formed from particulate material and a fibre.

IPC Classes  ?

• C10L 5/36 - Shape
• C10L 5/10 - Briquetting processes with the aid of binders, e.g. pretreated binders
• C10L 5/40 - Solid fuels essentially based on materials of non-mineral origin
• C10L 5/04 - Raw material to be usedPretreatment thereof

Abstract

A pellet comprising C-grade iron fines and a binder; a method of producing said pellet, comprising mixing the C-grade iron fines and the binder to form a mixture and agglomerating the mixture to form a pellet; and a method of producing steel, comprising heating a pellet comprising C-grade iron fines and a binder in an electric arc furnace.

IPC Classes  ?

• C21B 5/06 - Making pig-iron in the blast furnace using top gas in the blast furnace process
• C21C 5/52 - Manufacture of steel in electric furnaces
• C22B 1/24 - BindingBriquetting
• C22B 1/244 - BindingBriquetting with binders organic
• C22B 7/02 - Working-up flue dust
• C22B 1/245 - BindingBriquetting with binders organic with carbonaceous material for the production of coked agglomerates
• C21B 13/00 - Making spongy iron or liquid steel, by direct processes

Abstract

The invention relates to the use of fibres, often in briquettes, and to the production of briquettes, for instance from coal, metal or metal ores. Typically the briquettes are formed from particulate material and a fibre.

IPC Classes  ?

• C10L 5/10 - Briquetting processes with the aid of binders, e.g. pretreated binders

Abstract

The invention also provides a briquette comprising: (i) a particulate material; and (ii) a binder, the binder comprising (a) at least partially saponified polyvinyl alcohol and (b) an alkali metal alkyl siliconate or polyalkylsilicic acid; wherein the particulate material is selected from a carbonaceous material, metal, metal ore, mineral waste or a mixture thereof.

IPC Classes  ?

• C10L 5/36 - Shape
• C10L 5/14 - Briquetting processes with the aid of binders, e.g. pretreated binders with organic binders
• C10L 5/12 - Briquetting processes with the aid of binders, e.g. pretreated binders with inorganic binders
• C10L 10/00 - Use of additives to fuels or fires for particular purposes
• C10L 9/10 - Treating solid fuels to improve their combustion by using additives
• C10L 5/32 - Coating
• C10L 5/10 - Briquetting processes with the aid of binders, e.g. pretreated binders

Abstract

A binder formulation for iron ore pellets, the formulation comprising one or more silicates and a processing aid, a pellet comprising this binder formulation and a process for producing iron ore pellets comprising mixing a binder formulation as described with particulate iron ore and forming pellets.

IPC Classes  ?

• C22B 1/242 - BindingBriquetting with binders
• C08L 1/04 - OxycelluloseHydrocellulose
• C08L 5/00 - Compositions of polysaccharides or of their derivatives not provided for in group or
• C08K 3/34 - Silicon-containing compounds
• C08K 5/5419 - Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond

Abstract

The application describes pellets comprising particulate iron ore and between 0.05 and 1.0% by weight of an organic binder. The use of such pellets in electric arc furnaces to produce steel is also described.

IPC Classes  ?

• C22B 1/245 - BindingBriquetting with binders organic with carbonaceous material for the production of coked agglomerates
• C21C 5/52 - Manufacture of steel in electric furnaces

Abstract

A binder formulation for iron ore pellets, the formulation comprising one or more silicates and a processing aid, a pellet comprising this binder formulation and a process for producing iron ore pellets comprising mixing a binder formulation as described with particulate iron ore and forming pellets.

IPC Classes  ?

• C22B 1/242 - BindingBriquetting with binders

Abstract

The application describes pellets comprising particulate iron ore and between 0.05 and 1.0% by weight of an organic binder. The use of such pellets in electric arc furnaces to produce steel is also described.

IPC Classes  ?

• C22B 1/244 - BindingBriquetting with binders organic
• C22B 1/245 - BindingBriquetting with binders organic with carbonaceous material for the production of coked agglomerates
• C21C 5/52 - Manufacture of steel in electric furnaces

Abstract

The invention also provides a briquette comprising: (i) a particulate material; and (ii) a binder, the binder comprising (a) at least partially saponified polyvinyl alcohol (PVA) and (b) an alkali metal alkyl siliconate or polyalkylsilicic acid; wherein the particulate material is selected from a carbonaceous material, metal, metal ore, mineral waste or a mixture thereof.

IPC Classes  ?

• C10L 5/14 - Briquetting processes with the aid of binders, e.g. pretreated binders with organic binders