EP4267344A1 - Matériaux abrasifs de scories d'acier pour sablage - Google Patents

Matériaux abrasifs de scories d'acier pour sablage

Info

Publication number
EP4267344A1
EP4267344A1 EP21834916.5A EP21834916A EP4267344A1 EP 4267344 A1 EP4267344 A1 EP 4267344A1 EP 21834916 A EP21834916 A EP 21834916A EP 4267344 A1 EP4267344 A1 EP 4267344A1
Authority
EP
European Patent Office
Prior art keywords
slag
blasting
blasting medium
medium
crystalline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21834916.5A
Other languages
German (de)
English (en)
Inventor
Masoud Said AL-GAHTANI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SABIC Global Technologies BV
Original Assignee
SABIC Global Technologies BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SABIC Global Technologies BV filed Critical SABIC Global Technologies BV
Publication of EP4267344A1 publication Critical patent/EP4267344A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag

Definitions

  • the present invention generally relates to systems and processes for producing and using abrasive blasting media. More specifically, the present invention relates to a system and a method for producing and using a blasting medium comprising a slag.
  • Blasting is a process of smoothing and cleaning a hard surface by forcing solid particles across that surface at a high speed, usually using a compressed gas. It is a useful procedure in a broad range of applications and industries including cleaning, deburring, preparing for powder-coating, de-rusting, shot-peening, and paint removal.
  • a blasting system generally includes an air source, a blasting cabinet, a dust collector, and a blasting medium.
  • the air source usually includes a bottled gas or an air compressor.
  • the blasting cabinet is a large container that holds the blast media which is funneled downward through a set of valves that allow the amount entering the system to be controlled.
  • the air carries blasting media to travel through the blast hose and out of a nozzle of a handheld gun.
  • the particles travel at high velocities and impact the object, stripping the surface.
  • blasting media used in this process includes sand, glass beads, plastic, or other materials.
  • these existing material for blasting media may not meet all the requirements for all applications and purposes.
  • these conventional materials for blasting media may need to be purchased, further increasing the cost for blasting.
  • a solution to at least some of the above mentioned problems associated with the systems and methods for blasting hard surfaces has been discovered.
  • the solution resides in a method for producing a blasting medium from a slag that is generated during a steel making process. This can be beneficial in providing a supply of blasting medium from a waste product/by product with minimal to no cost.
  • slag is a strong, dense, non-porous aggregate that can be in cubical shape, with high resistance to polishing, resulting in high effectiveness in abrasive blasting.
  • the slag used in the disclosed method can be poured at about 1600 °C and then air-cooled to form crystalline slag, resulting in high hardness of the slag. Therefore, the systems and the methods of the present invention provide a technical solution to at least some of the problems associated with the conventional systems and methods for abrasive blasting as mentioned above.
  • Embodiments of the invention include a method of producing a blasting medium.
  • the method comprises pouring, at a temperature of 1300 to 1900 °C, a slag obtained from a steel making process.
  • the method comprises processing the slag to produce the blasting medium.
  • Embodiments of the invention include a method of abrasive blasting.
  • the method comprises pouring, at a temperature of 1300 to 1900 °C, a slag obtained from a steel making process.
  • the method comprises processing the slag to produce a blasting medium.
  • the method comprises cleaning a surface by blasting the blasting medium on the surface.
  • Embodiments of the invention include a method of abrasive blasting.
  • the method comprises pouring, at a temperature of 1300 to 1900 °C, a slag formed in an electric arc furnace in a steel making process.
  • the method comprises cooling the slag to form a crystalline slag.
  • the method comprises atomizing the crystalline slag to produce a blasting medium comprising slag particles with a particle size in a range of 50 to 500 pm.
  • the method comprises cleaning a surface by blasting the blasting medium on the surface.
  • X, Y, and/or Z can be construed as X only, Y only, Z only, or any combination of two or more items X, Y, and Z (e.g., XYZ, XY, XZ, YZ).
  • wt.% refers to a weight, volume, or molar percentage of a component, respectively, based on the total weight, the total volume, or the total moles of material that includes the component.
  • 10 moles of component in 100 moles of the material is 10 mol.% of component.
  • blasting medium means a material that is in fine (particle) forms and used to be sprayed under high pressure against a surface.
  • primarily means greater than any of 50 wt.%, 50 mol.%, and 50 vol.%.
  • “primarily” may include 50.1 wt.% to 100 wt.% and all values and ranges there between, 50.1 mol.% to 100 mol.% and all values and ranges there between, or 50.1 vol.% to 100 vol.% and all values and ranges there between.
  • FIG. 1 shows a schematic diagram for a system for producing and using a blasting medium, according to embodiments of the invention.
  • FIG. 2 shows a method of abrasive blasting, according to embodiments of the invention.
  • abrasive blasting is conducted using a blasting system that generally includes an air source, a blasting cabinet, a dust collector, and a blasting medium.
  • the blasting medium is carried by the air source (e.g., compressed gas) through a nozzle gun at a high velocity to impact a hard surface.
  • the most commonly used blasting media can include sand, glass beads, plastic, or other materials, which need to be purchased, thereby increasing the cost for blasting. Additionally, the commonly used blasting media may not meet all the requirements for blasting various types of surfaces. The present invention provides a solution to at least some of these problems.
  • the solution is premised on a system and method for producing and using a blasting medium that includes using a slag that is produced during a steel making process to make the blasting medium.
  • the slag can be provided from a steel production plant with minimal to no cost, thereby reducing the cost for abrasive blasting.
  • the slag used in the disclosed method can be poured at about 1600 °C and then air-cooled to form crystalline slag, resulting in high hardness of the slag.
  • the slag is a strong, dense, non-porous aggregate that can be in cubical shape, with high resistance to polishing, resulting in high effectiveness in abrasive blasting.
  • the system for producing a blasting medium includes a slag pouring facility, and a slag processing facility.
  • a schematic diagram is shown for system 100, which is used for producing a blasting medium from a slag.
  • system 100 includes pouring facility 101 configured to pour slag from a molten bath of a steel making unit.
  • the slag floats on top of molten bath of steel, and the slag is separated from the steel by pouring the top content of the molten bath of steel.
  • the pouring facility is configured to pour the slag at a high temperature in a range of 1300 to 1900 °C.
  • system 100 includes cooling unit 102 configured to cool the poured slag to form a crystalline slag.
  • cooling unit 102 includes a container for cooling the poured slag in ambient air.
  • Cooling unit 102 may further include a cooling structure comprising a cooling jacket, an air blower, water spray, or combinations thereof (not shown).
  • system 100 includes atomizer 103 configured to process the crystalline slag to form a blasting medium comprising slag particles.
  • the slag particles have a particle size in a range of 50 to 500 pm.
  • atomizer 103 may include a grinder, crusher, a hammer, or combinations thereof.
  • system 100 may further include blasting system 104 comprising an air source, a blasting cabinet, a dust collector, and a blasting medium.
  • the air source includes a bottled gas or an air compressor.
  • the blasting cabinet can include a container that holds the blast media (not shown).
  • the air from the air source is configured to carry blasting media to travel through a blast hose and out of a nozzle.
  • Methods of producing a blasting medium using a slag produced from steel making and using the blasting medium for abrasive blasting have been discovered.
  • embodiments of the invention include method 200 for abrasive blasting with a blasting medium produced from a slag.
  • Method 200 may be implemented by system 100, as shown in FIG. 1 and described above.
  • method 200 includes pouring a slag obtained from a steel making process.
  • pouring at block 201 is conducted when the slag is at temperature of 1300 to 1900 °C and all ranges and values there between including ranges of 1300 to 1350 °C, 1350 to 1400 °C, 1400 to 1450 °C, 1450 to 1500 °C, 1500 to 1550 °C, 1550 to 1600 °C, 1600 to 1650 °C, 1650 to 1700 °C, 1700 to 1750 °C, 1750 to 1800 °C, 1800 to 1850 °C, and 1850 to 1900 °C.
  • the pouring at block 201 can be conducted when the slag is at 1600 °C.
  • the slag is produced in an electric arc and/or a ladle furnace.
  • the slag includes 15 to 30 wt.% FeO and Fe2Ch, 30 to 50 wt.% CaO, 6 to 12 wt.% MgO, 10 to 20 wt.% SiO, and 5 to 10 wt.% AI2O3.
  • method 200 includes processing the slag to produce a blasting medium.
  • the processing at block 202 includes cooling the slag to form a crystalline slag.
  • the cooling is conducted via air cooling.
  • the air cooling may be performed in ambient air.
  • cooling at block 202 may be conducted a cooling jacket, an air blower, a water sprayer, or combinations thereof.
  • the crystalline slag is in cubical shape.
  • the processing at block 202 includes atomizing the crystalline slag to produce a blasting medium comprising slag particles.
  • the atomizing at block 204 includes grinding.
  • the slag particles have a particle size in a range of 50 to 500 pm and all ranges and values there between including ranges of 50 to 100 pm, 100 to 150 pm, 150 to 200 pm, 200 to 250 pm, 250 to 300 pm, 300 to 350 pm, 350 to 400 pm, 400 to 450 pm, and 450 to 500 pm.
  • the blasting medium has a hardness of 6 to 8 Mohs and all ranges and values there between including ranges of 6 to
  • the blasting medium includes particles in fine shape, nominal shape, coarse shape, or combinations thereof.
  • the fine shape can have a size in a range of 40 to 200 pm
  • the nominal shape can have a size in a range of 200 to 350 pm
  • the coarse shape can have a size in a range of 350 to 500 pm.
  • method 200 includes cleaning a surface by blasting the blasting medium on the surface.
  • the blasting of the blasting medium at block 205 is conducted using a compressed gas.
  • the blasting in embodiments of the invention, is conducted with a gas pressure of 3.5 to 9 bar and all ranges and values there between including ranges of 3.5 to 4.0 bar, 4.0 to 4.5 bar, 4.5 to 5.0 bar, 5.0 to 5.5 bar, 5.5 to 6.0 bar, 6.0 to 6.5 bar, 6.5 to 7.0 bar, 7.0 to 7.5 bar, 7.5 to 8.0 bar, 8.0 to 8.5 bar, and 8.5 to 9.0 bar.
  • the blasting can be configured to de-scale steel, deburr a material, shot-peen a material, and/or remove paint from a surface.
  • Embodiment 1 is a method of producing a blasting medium.
  • the method includes pouring, at a temperature of 1300 to 1900 °C, a slag obtained from a steel making process.
  • the method further includes processing the slag to produce the blasting medium.
  • Embodiment 2 is a method of abrasive blasting.
  • the method includes pouring, at a temperature of 1300 to 1900 °C, a slag obtained from a steel making process.
  • the method further includes processing the slag to produce a blasting medium.
  • the method still further includes cleaning a surface by blasting the blasting medium on the surface.
  • Embodiment 3 is the method of embodiment 2, wherein the processing step includes cooling the slag to form a crystalline slag.
  • the method further includes atomizing the crystalline slag to produce a blasting medium containing slag particles.
  • Embodiment 4 is the method of any of embodiments 2 and 3, wherein the slag particles have a particle size in a range of 50 to 500 microns.
  • Embodiment 5 is the method of any of embodiments 2 to 4, wherein the atomizing includes grinding.
  • Embodiment 6 is the method of any of embodiments 2 to 5, wherein the crystalline slag is substantially in cubical shape.
  • Embodiment 7 is the method of any of embodiments 2 to 6, wherein the cooling includes air cooling.
  • Embodiment 8 is the method of any of embodiments 2 to 7, wherein the pouring is conducted at 1600 °C.
  • Embodiment 9 is the method of any of embodiments 2 to 8, wherein the blasting is conducted with a gas pressure of 3.5 to 9 bar.
  • Embodiment 10 is the method of any of embodiments 2 to 9, wherein the blasting of the blasting medium is conducted using a compressed gas.
  • Embodiment 11 is the method of any of embodiments 2 to 10, wherein the slag includes 15 to 30 wt.% FeO and Fe2O3, 30 to 50 wt.% CaO, 6 to 12 wt.% MgO, 10 to 20 wt.% SiO, and 5 to 10 wt.% AI2O3.
  • Embodiment 12 is the method of any of embodiments 2 to 11, wherein the blasting is configured to de-scale steel, deburr a material, shot-peen a material, and/or remove paint from a surface.
  • Embodiment 13 is the method of any of embodiments 2 to 12, wherein the blasting medium has a hardness of 6 to 8 Mohs.
  • Embodiment 14 is the method of any of embodiments 2 to 13, wherein the blasting medium includes particles in fine shape, nominal shape, coarse shape, or combinations thereof.
  • Embodiment 15 is a method of abrasive blasting, the method including pouring, at a temperature of 1300 to 1900 °C, a slag formed in an electric arc furnace in a steel making process. The method further includes cooling the slag to form a crystalline slag. The method still further includes atomizing the crystalline slag to produce a blasting medium containing slag particles with a particle size in a range of 50 to 500 microns. The method also includes cleaning a surface by blasting the blasting medium on the surface.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne des systèmes et des procédés de production d'un milieu de sablage à partir d'une scorie et d'utilisation du milieu de sablage. Une scorie produite pendant des processus de fabrication d'acier est coulée à une température élevée. La scorie coulée est ensuite traitée ultérieurement pour produire le milieu de sablage. Le milieu de sablage est utilisé pour nettoyer une surface par sablage.
EP21834916.5A 2020-12-28 2021-12-16 Matériaux abrasifs de scories d'acier pour sablage Pending EP4267344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063131216P 2020-12-28 2020-12-28
PCT/IB2021/061851 WO2022144671A1 (fr) 2020-12-28 2021-12-16 Matériaux abrasifs de scories d'acier pour sablage

Publications (1)

Publication Number Publication Date
EP4267344A1 true EP4267344A1 (fr) 2023-11-01

Family

ID=79164670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21834916.5A Pending EP4267344A1 (fr) 2020-12-28 2021-12-16 Matériaux abrasifs de scories d'acier pour sablage

Country Status (4)

Country Link
US (1) US20240042577A1 (fr)
EP (1) EP4267344A1 (fr)
CN (1) CN116670303A (fr)
WO (1) WO2022144671A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1348586A (fr) * 1964-04-10
FR2288783A1 (fr) * 1974-10-21 1976-05-21 Gagneraud Pere & Fils Procede de traitement de laitiers et scories metallurgiques en vue, notamment, d'ameliorer leur aptitude a la fragmentation
UA92745C2 (ru) * 2005-09-12 2010-12-10 Энтони Раймонд Вакс Способ переработки исходного материала в виде отходов необработанного металлургического шлака
KR20070105017A (ko) * 2006-04-24 2007-10-30 남용호 스틸슬래그를 이용하는 연마재 및 그 제조방법
JP5565826B2 (ja) * 2009-10-16 2014-08-06 日新製鋼株式会社 ブラスト処理用研削材およびその製造方法

Also Published As

Publication number Publication date
WO2022144671A1 (fr) 2022-07-07
CN116670303A (zh) 2023-08-29
US20240042577A1 (en) 2024-02-08

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