A method of manufacturing of a steel product in several steelmaking units

Patent metadata

Field	Value
Publication number	US-2024229175-A9
Application number	US-202218278027-A
Country	US
Kind code	A9
Filing date	Feb 23, 2022
Priority date	Feb 26, 2021
Publication date	Jul 11, 2024
Grant date	—

Abstract

A method of manufacturing a steel product into at least two different steelmaking units wherein an expected level of CO2 emissions for the manufacturing of said product in each respective steelmaking unit is calculated.

First claim

What is claimed is:

1 - 8 . (canceled)

9 : A method of manufacturing of a steel product P in at least two steelmaking units S i , the method comprising the following steps:
a calculation step wherein an expected level of CO2 emissions Eexp i is calculated to manufacture P in each steelmaking unit S i , such calculation being done considering all CO 2 contributions associated to raw materials, energy sources and processes used for manufacturing the steel product P in each respective steelmaking unit S i , and manufacturing the product P into the steelmaking unit S i wherein the calculated expected level of CO2 emissions Eexp i is the lowest.

10 : The method as recited in claim 9 wherein raw materials are chosen from the group consisting of: coal, coke, iron ore, biomass, sintered ore, agglomerates, pellets, direct-reduced iron (DRI), scrap, mineral additions, alloying elements, oxygen and hydrogen.

11 : The method as recited in claim 10 wherein scrap is chosen and wherein scrap is of different types and chosen from the group consisting of: old scrap, new scrap, prime scrap, home scrap, pit scrap, shredded, plates and structure scrap, heavy melting scrap, cast scrap, coil scrap and busheling scrap.

12 : The method as recited in claim 9 wherein energy sources are chosen from the group consisting of: renewable electricity, electricity produced by internal recycling of exhaust gas from the steel manufacturing process and electricity produced by capture of heat released by products from the steel manufacturing process.

13 : The method as recited in claim 9 wherein the processes are chosen from the group consisting of: coking, sintering, ironmaking, steelmaking, casting, and finishing.

14 : The method as recited in claim 9 wherein the processes are chosen from the group consisting of: direct reduction processes, hydrogen-based ironmaking, steel electrolysis, blast furnace with top-gas recycling, blast furnace with top-gas conversion, electric-arc-furnace steelmaking, converter steelmaking, and scrap melting.

15 : The method as recited in claim 9 wherein, for a given steelmaking unit S i , at least two different manufacturing routes MR i,x for the steel product P are defined and the calculation of expected level of CO2 emissions Eexp i,x is also performed for each said defined manufacturing route MR i,x and the manufacturing of the product P is performed according to the manufacturing route having the lowest calculated expected level of CO2 emissions of both Eexp i and Eexp i,x .

16 : The method as recited in claim 9 further comprising a step, after the manufacturing step, of establishing a certificate for the manufactured steel indicated the level Eexp i of CO2 emissions associated to a manufacturing route.

Assignees

• Arcelormittal

Inventors

• Da Gama Campos Hugo
• Van Der Hoeven Jean-Martin

Classifications

• C21C2300/06

  Modeling of the process, e.g. for control purposes; CII · CPC title

• C21C2100/02

  Treatment of the exhaust gas · CPC title

• C21C5/4673 Primary

  Measuring and sampling devices · CPC title

• C21C5/38

  Removal of waste gases or dust · CPC title

• C21B2300/04

  Modeling of the process, e.g. for control purposes; CII · CPC title