WO2006085712A1 - Materiau abrasif realise en scories atomisees, installation et procede de fabrication - Google Patents

Materiau abrasif realise en scories atomisees, installation et procede de fabrication Download PDF

Info

Publication number
WO2006085712A1
WO2006085712A1 PCT/KR2005/003295 KR2005003295W WO2006085712A1 WO 2006085712 A1 WO2006085712 A1 WO 2006085712A1 KR 2005003295 W KR2005003295 W KR 2005003295W WO 2006085712 A1 WO2006085712 A1 WO 2006085712A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
abrasive material
gas
balls
weight
Prior art date
Application number
PCT/KR2005/003295
Other languages
English (en)
Inventor
Ok-Soo Oh
Sang-Yoon Oh
Original Assignee
Ecomaister Co., Ltd.
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36793264&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2006085712(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ecomaister Co., Ltd. filed Critical Ecomaister Co., Ltd.
Publication of WO2006085712A1 publication Critical patent/WO2006085712A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1409—Abrasive particles per se
    • C09K3/1427—Abrasive particles per se obtained by division of a mass agglomerated by melting, at least partially, e.g. with a binder
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the present invention relates to slag balls for abrasive material, and a facility and method for manufacturing the same. More specifically, the present invention relates to slag ballswhich can be utilized as an abrasive material for blast cleaning and are prepared by atomizing waste steel-making slag (converter slag or electric furnace slag) remaining after steel-making in steel making processes in iron mills.
  • Blast cleaning refers to surface cleaning involving abrading a work surface or removing an aged paint or rust scales from the work surface via kinetic energy of collided particles generated by high-speed injection of a hard abrasive such as sand or steel balls into the surface.
  • blast cleaning is broadly divided into 1) power blast using high-pressure air, 2) wet blast using water and the abrasive materials in liquid phase (also called liquid honing ), 3) centrifugal blast using centrifugal force of a rapidly revolving wheel, and 4) vacuum blast involving injecting the abrasive materials while simultaneously recovering the abrasive materials and dust via use of vacuum.
  • the abrasive materials currently utilized in blast cleaning may be classified into metal abrasive materials employed in shot blasting and non-metal abrasive materials employed in sand blasting.
  • Metal abrasive materials advantageously exhibit excellent durability and abrasion efficiency, as compared to non-metal abrasive materials.
  • the metal abrasive materials suffer from disadvantages such as significantly expensive product unit costs, i.e., 10 to 70 times higher than non-metal abrasives, and need for special fabrication of blast machines suited for properties of respective materials, thus narrow ranges of uses and applications thereof, and restricted uses in abrasion products requiring special surface-processing.
  • Publication Laid-open No. 2003-0080207 has proposed a method utilizing copper slag as the abrasive. This technique is substantially encouraging and promising from a standpoint of waste material recycling, but attracts little attention as application of the abrasive, due to problems such as high unit costs of products, weak hardness, poor roughness of a workpiece after blasting, corrosiveness of copper slag, production of large quantities of dust after blasting and incapability to re-use.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a non-metal abrasive material which has sufficient hardness and roughness, thus exhibiting abrasion efficiency comparable to metal abrasive materials, does not cause corrosion of a workpiece, does not produce dust and is reusable and a facility and method for manufacturing the same.
  • an abrasive material prepared by atomizing converter or electric furnace slag, and having a particle diameter of 0.1 to 2.0 mm and Mohs hardness of 6.5 to 8.0.
  • the converter or electric furnace slag preferably contains 14 to 63% by weight of CaO, 22 to 45% by weight of Fe O , 10 to 20%by weight of SiO , 6 to 10% by weight of MgO, less than 3% by weight of FeO, less than 5.5% by weight of Al O and the balance of other inevitable impurities.
  • the abrasive material preferably has a uniformity coefficient of less than 1.3, as expressed by the following equation:
  • P represents a mesh size through which 10% of a sample has passed.
  • the abrasive material is effective at a particle diameter of 0.4 to 2.0 mm.
  • a fa- cilityfor manufacturing an abrasive material comprising a slag pot for receiving and discharging meltedslag, a tundish for storing transiently and discharging the melted slag discharged from the slag pot, and a gas nozzle for injecting gas forward, such that the melted slag discharged from the tundish can be injected and transported by kinetic energy of gas.
  • the facility may further include a cooling fence for injecting water or water vapor, in order to cool the slag that is transported forward by the gas injected from the gas nozzle.
  • a cooling fence for injecting water or water vapor, in order to cool the slag that is transported forward by the gas injected from the gas nozzle.
  • the facility may further include a carrier for transferring the transported slag and a particle size-screening device for grading the slag into the particle size necessary for the abrasive material.
  • the gas injection nozzle of the manufacturing facility is a two- stage nozzle composed of upper and lower nozzles.
  • a method of manufacturing an abrasive material comprising discharging melted slag; atomizing the discharged slag into fine droplets by a high-speedgas stream; cooling the pulverized fine droplets into solid slag balls; and screening the cooled slag balls into an abrasive material having a particle size of 0.1 to 2.0 mm.
  • the abrasive material obtained by special processing of melted steel-making slag in accordance with the present invention and the manufacturing method thereof provide various advantages such as no need for a breakingstep as needed in conventional methods using slag, high hardness, improved surface roughness of the workpiece to be abraded due to uniform particle size, easy recovery and re-usability due to magnetism, and remarkably reduced dust.
  • Fig. 1 is a facility for manufacturing an abrasive material in accordance with the present invention.
  • An abrasive materialin accordance with the present invention is prepared by atomizing converter slag or electric furnace slag and such slag generally has the following composition as set forth in Table 1 below, even though there may be some difference depending upon kinds of steel prepared.
  • Slag balls having such a composition may include various kinds of composite phases such as 2CaO Fe O , 3CaO Fe O , MgO Al O and 3CaO SiO therein.
  • phase MgO-Al O among the composite phases takes a very stable phase called a spinel, and thereby greatly contributes to improved hardness of slag balls. Therefore, slag balls utilized in the present invention exhibit very high hardness values, i.e., Mohs hardness of 6.5 to 8.0 and Vickers hardness of 500 to 700. Thus, where the slag balls are blasted to the workpiece of interest, it is possible to abradethe surface of the workpiece or it is possible to easily remove impurities such as rust or paint films present on the surface of the workpiece, due to their high hardness.
  • slag balls for use as the abrasive material of the present invention needs to have auniformity coefficient of less than 1.3, as expressed by the following equation 1:
  • P represents a mesh size through which 10% of a sample has passed. If the entire
  • the slag balls in order to achieve collision between the workpiece and slag balls with suitable kinetic energy, preferably have a density of 3.2 to 4.0 g/cm and a diameter of 0.1 to 2.0 mm. More preferably, diameter distribution of slag balls is between 0.4 and 2.0 mm, in order to obtain a more regular abrasive surface.
  • the slag balls prepared to meet the above-mentioned requirements, 1) have high hardness, 2) contain no substantial dust and exhibit no fragility, leading to no substantial production of dust, 3) thus can be used multiple times, 4) are capable of improving roughness of the workpiece due to a uniform particle diameter, and 5) are made up of waste materials, thereby being advantageous from a standpoint of environmental protection.
  • melted slag discharged from a converter or electric furnace, is received in a slag pot 1, a container to accommodate the slag.
  • the melted slag 2 received in the slag pot 1 is then poured intoa tundish 3, which renders flow of the melted slag uniform and at the same time, serves to maintain a constant flow rate thereof, and serves such that the melted slag can be fallen in a widely spread state at a pouring side of the tundish 3.
  • a discharge angle of a discharge port of the tundish 3 is preferably 10 to 60°downward relative to the horizontal.
  • the nozzle for injecting the gas or gas/water mixture is preferably a two-stage nozzle composed of upper and lower nozzles 4 and 5.
  • the upper nozzle 4 serves to pulverize the falling melted slag into fine droplets by kinetic energy of the injected gas or gas/water mixture while at the same time, transporting the resulting fine droplets to a piling yard site.
  • the lower nozzle 5 serves to assist the upper nozzle 4 and thus pulverizes the slag, which is falling without being transported to the piling yard site by the gas or gas/water mixture injected from the upper nozzle 4, into a final size while at the same time, transporting the pulverized slag to the piling yard site.
  • the present inventors have confirmed that installation of the gas nozzles to inject the gas at an angle of 0 to 45°upward with respect to the horizontal is effective for size control of slag ball and smooth transportation thereof. Therefore, the two-stage nozzle is preferably installed to inject gas at an angle of 0 to 45°, respectively.
  • the gas injected from the two-stage nozzle is injected at a blast pressure of 100 to 1050 mmAg for effective control of the particle size of slag balls and smooth transportation thereof.
  • Water injection nozzles may be further included at both sides of the two-stage nozzle.
  • the water injection nozzles serve to quench atomized slag droplets by supplying water in admixture with gas injected from the two-stage nozzle.
  • the transported slag pot was moved again directly over a tundish by an overhead crane and was tilt at a suitable angle so as to discharge melted slag into the tundish.
  • a discharge rate of the melted slag was set at 1,000 to 1,500 kg/min.
  • the pot was tilted such that the tilt angle of the slag pot becomes gradually sharp, depending upon residual mass of the slag.
  • An angle of a discharge port of the tundish was fixed to 30° downward with respect to the horizontal.
  • Gas injection angles of the two-stage nozzle were fixed to 24° (for the upper nozzle) and 30° (for the lower nozzle), respectively, upward with respect to the horizontal.
  • UC uniformity coefficient
  • results of X-ray diffraction (XRD) analysis of the abrasive material show that the abrasive material contains no substantial free lime. Therefore, it was confirmed that there was no differentiation of the abrasive material due to hydration even with prolonged storage thereof.
  • XRD X-ray diffraction
  • Table 3 shows results of comparison on properties between the abrasive material in accordance with the present invention and conventional abrasive materials.
  • slag balls in accordance with the present invention have true specific density (3.54 g/cm ) lower than that of steel balls(about 7.2 g/cm ), but it can be seen that slag balls of the present invention have excellent properties to serve as the abrasive material, considering that natural sand, widely used as sand blast materials, has true specific density of 2.62.
  • slag balls of the present invention did not exhibit significant difference in hardness, as compared with steel balls, and had post- blasting roughness of workpiece similar to the level of steel balls. Further, as can be seen from results of Table 2, slag balls of the present invention do not leach harmful heavy metals at all and thus can be easily reclaimed as general waste.
  • slag abrasive material employed in the present invention is substantially free from limitations associated with blasting equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Details (AREA)

Abstract

La présente invention a trait à des billes de scories pour un matériau abrasif, et à une installation et un procédé pour la fabrication d'un tel matériau. De manière plus spécifique, la présente invention a trait à des billes de scories qui peuvent être utilisées sous la forme d'un matériau abrasif pour le décapage au jet et sont préparées par l'atomisation de scories sidérurgiques excédentaires (scories de convertisseur ou scories de four électrique) résiduelles suite à la fabrication d'acier provenant de procédés sidérurgiques dans des usines sidérurgiques. Ledit matériau peut être obtenu par la fourniture d'un matériau abrasif préparé par l'atomisation de scories de convertisseur ou de four électrique, et présentant un diamètre de particules de 0,1 à 2,0 mm et de dureté Mohs de 6,6 à 8,0. Le matériau abrasif préparé par traitement spécial de scories sidérurgiques fondues selon la présente invention procure divers avantages tels que l'élimination d'une étape de broyage utilisée dans procédés classiques mettant en oeuvre des scories, une dureté élevée, une rugosité de surface améliorée de la pièce à abraser due à une dimension de particules uniforme, une récupération et une réutilisation faciles dues au magnétisme, et une réduction de génération de poussières notable.
PCT/KR2005/003295 2004-11-23 2005-10-06 Materiau abrasif realise en scories atomisees, installation et procede de fabrication WO2006085712A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2004-0096074 2004-11-23
KR20040096074 2004-11-23

Publications (1)

Publication Number Publication Date
WO2006085712A1 true WO2006085712A1 (fr) 2006-08-17

Family

ID=36793264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/003295 WO2006085712A1 (fr) 2004-11-23 2005-10-06 Materiau abrasif realise en scories atomisees, installation et procede de fabrication

Country Status (4)

Country Link
KR (1) KR101194277B1 (fr)
CN (1) CN101065505A (fr)
TW (1) TWI390025B (fr)
WO (1) WO2006085712A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2615157A1 (es) * 2017-03-16 2017-06-05 Endesa Generacion, S.A. Procedimiento de preparación de producto abrasivo
RU2779194C1 (ru) * 2021-04-19 2022-09-05 Публичное Акционерное Общество "Новолипецкий металлургический комбинат" Абразивный материал и способ его изготовления из жидкого шлака доменного производства
US20220332994A1 (en) * 2021-04-14 2022-10-20 Harsco Technologies LLC Demetallized slag for abrasives and/or roofing granules and related methods

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101014400B1 (ko) * 2006-06-14 2011-02-15 주식회사 에코마이스터 슬래그의 안정화 방법 및 이를 통해 생성된 물품
US20090193849A1 (en) * 2006-06-14 2009-08-06 Ecomaister Co., Ltd. Method for stabilizing slag and novel materials produced thereby
CN101298551B (zh) * 2008-06-13 2011-11-16 中冶宝钢技术服务有限公司 一种钢渣除锈磨料的制备方法
KR101355460B1 (ko) * 2011-12-27 2014-01-29 주식회사 에코마이스터 실리콘망간 슬래그 볼 및 그 제조방법
KR101379453B1 (ko) * 2012-06-28 2014-03-31 주식회사 에코마이스터 슬래그 처리장치용 분사장치의 분사노즐 경사각도 조절에 따른 슬래그 볼의 입도 제어방법
KR101379452B1 (ko) * 2012-06-28 2014-04-04 주식회사 에코마이스터 제강공정의 2차 정련 환원 슬래그 처리장치
WO2014061950A1 (fr) * 2012-10-19 2014-04-24 주식회사 에코마이스터 Système d'atomisation de laitier d'aciérie à l'aide de chaleur résiduaire
KR20140065562A (ko) * 2012-11-16 2014-05-30 주식회사 에코마이스터 탄소강과 망간 합금철 및 스테인레스강의 환원 탈린공정에서 생성되는 탈린 슬래그의 안정화 방법
CN103707204B (zh) * 2013-12-10 2016-04-13 安徽工业大学 一种利用炼钢转炉渣对工件表面进行喷砂处理的方法
CN104141027B (zh) * 2014-07-25 2016-08-17 马钢(集团)控股有限公司 一种综合利用炼钢转炉风淬渣的方法
CN104384176B (zh) * 2014-11-19 2016-09-14 晋江市冠兴建材有限责任公司 一种环保型煤渣回收处理系统
CN105670563B (zh) * 2016-01-07 2018-06-12 上海亚都塑料有限公司 一种高抗磨耐腐蚀复合研磨材料的制备方法
CN113046025A (zh) * 2021-03-31 2021-06-29 成渝钒钛科技有限公司 一种高钛高炉渣非金属磨料及制备方法
CN115044349A (zh) * 2022-04-18 2022-09-13 江汉大学 一种喷射清理用非金属磨料及其制备方法
CN115584239B (zh) * 2022-09-29 2024-03-26 浙江申联环保集团有限公司 一种利用工业废渣生产非金属磨料的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337085A (en) * 1980-09-30 1982-06-29 Kennecott Corporation Recovery of precious metals from spent alumina-containing catalysts
US5462570A (en) * 1993-01-26 1995-10-31 Dunkirk International Glass And Ceramics Corporation Process for producing an environmentally acceptable abrasive product from hazardous wastes
US5496392A (en) * 1990-12-21 1996-03-05 Enviroscience Method of recycling industrial waste

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549059A (en) * 1994-08-26 1996-08-27 Minergy Corp. Converting paper mill sludge or the like
JP3793261B2 (ja) * 1995-10-18 2006-07-05 Ｊｆｅマテリアル株式会社 研掃材の製造方法およびその装置
KR19980084280A (ko) * 1997-05-22 1998-12-05 오옥수 제강슬레그를 주원료로 한 시멘트
JP3720622B2 (ja) * 1999-04-09 2005-11-30 株式会社星野産商 ショットブラスト用粒体
KR20010046369A (ko) * 1999-11-12 2001-06-15 이구택 생콘크리트의 유동성 증진방법
KR20020033008A (ko) * 2000-05-19 2002-05-04 오옥수 제강 슬래그로부터의 지금회수 및 슬래그 처리방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337085A (en) * 1980-09-30 1982-06-29 Kennecott Corporation Recovery of precious metals from spent alumina-containing catalysts
US5496392A (en) * 1990-12-21 1996-03-05 Enviroscience Method of recycling industrial waste
US5462570A (en) * 1993-01-26 1995-10-31 Dunkirk International Glass And Ceramics Corporation Process for producing an environmentally acceptable abrasive product from hazardous wastes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2615157A1 (es) * 2017-03-16 2017-06-05 Endesa Generacion, S.A. Procedimiento de preparación de producto abrasivo
US20220332994A1 (en) * 2021-04-14 2022-10-20 Harsco Technologies LLC Demetallized slag for abrasives and/or roofing granules and related methods
RU2779194C1 (ru) * 2021-04-19 2022-09-05 Публичное Акционерное Общество "Новолипецкий металлургический комбинат" Абразивный материал и способ его изготовления из жидкого шлака доменного производства

Also Published As

Publication number Publication date
KR101194277B1 (ko) 2012-10-29
TW200621962A (en) 2006-07-01
CN101065505A (zh) 2007-10-31
TWI390025B (zh) 2013-03-21
KR20060057497A (ko) 2006-05-26

Similar Documents

Publication Publication Date Title
WO2006085712A1 (fr) Materiau abrasif realise en scories atomisees, installation et procede de fabrication
TWI574791B (zh) Blasting material for blasting and its manufacturing method
US3716947A (en) Abrasive blast cleaning system
CN103707204B (zh) 一种利用炼钢转炉渣对工件表面进行喷砂处理的方法
CN201046415Y (zh) 水渣渣铁分离及回收利用装置
CN101927422B (zh) 一种钢丝切丸的制作工艺
KR20070105017A (ko) 스틸슬래그를 이용하는 연마재 및 그 제조방법
US3883997A (en) Process for producing high-grade metallic products from solid slags and high-grade metallic products
JP5565826B2 (ja) ブラスト処理用研削材およびその製造方法
JPH1015523A (ja) 重量骨材
KR101406666B1 (ko) 슬래그 연마재 제조장치 및 열연강대의 스케일 제거방법
JP3746962B2 (ja) 研磨材及び該研磨材を用いた研磨方法
US4044459A (en) High-grade metallic products
US20240042577A1 (en) Steel slag abrasive materials for blasting
WO1997014760A1 (fr) Procede de traitement de materiaux contenant du fer et produits ainsi obtenus
KR101015805B1 (ko) 금형 및 정밀부품의 클리닝에 사용되는 연마재의 제조방법
KR20220022270A (ko) 폐내화물을가공 처리한 연마재, 그 제조장치 및 제조방법
CN101161848A (zh) 耐腐蚀合金砂及其制备方法
CN1307954A (zh) 气动砂洗方法及其装置
JP4049848B2 (ja) 研削材
CA1119822A (fr) Methode d'enrichissement de rejets, et matiere metallique abrasive obtenu par ladite methode
Meneghel et al. Recycling carbon-steel waste from blast cleaning by powder metallurgy employing the augmented simplex lattice design
JP2004067396A (ja) 高炉スラグ細骨材の製造方法
KR100815143B1 (ko) 다이캐스팅 금형 물품 표면 연마재
KR101199890B1 (ko) 커팅 스테인레스 스크랩을 이용한 연마재의 가공장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 200580040108.2

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 05856448

Country of ref document: EP

Kind code of ref document: A1