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WO1997014760A1 - Procede de traitement de materiaux contenant du fer et produits ainsi obtenus - Google Patents

Procede de traitement de materiaux contenant du fer et produits ainsi obtenus Download PDF

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Publication number
WO1997014760A1
WO1997014760A1 PCT/US1996/016839 US9616839W WO9714760A1 WO 1997014760 A1 WO1997014760 A1 WO 1997014760A1 US 9616839 W US9616839 W US 9616839W WO 9714760 A1 WO9714760 A1 WO 9714760A1
Authority
WO
WIPO (PCT)
Prior art keywords
product
iron
sieve
metallic
slag
Prior art date
Application number
PCT/US1996/016839
Other languages
English (en)
Inventor
Don E. Sanchez
H. William Hitzrot
Original Assignee
Chesapeake Specialty Products
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 Chesapeake Specialty Products filed Critical Chesapeake Specialty Products
Publication of WO1997014760A1 publication Critical patent/WO1997014760A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • 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
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/32—Spheres
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Definitions

  • the present invention relates generally to the processing of iron-containing materials which may be formed during the manufacture of iron and steel. More particularly, the present invention relates to a new and useful composition and method for cutting and cleaning metals, metal alloys, stone, plastics and ceramics using water jetting, and methods for processing waste products formed during the manufacture of iron and steel to produce reusable metallic products.
  • High pressure water blasting (less than 20,000 psi) and ultra high pressure water blasting (greater than 20,000 psi) (collectively, water jetting) is an evolving process for cutting virtually any solid object including metals and metal alloys (e.g., steel).
  • the advantage of water jetting is that it does not generate dust and thus reduces the need for containment systems. Water jetting is also used when heat or flame cannot be tolerated when cutting metal surfaces, for example, when cutting a hole in a fuel storage tank.
  • Another advantage of water jetting steel is that it does not "heat treat" the steel being cut, as is the case of flame cutting methods.
  • silica sand Materials currently being used for water cutting and cleaning include silica sand, garnet, and coal slag. These products are typically used for dry blast cleaning of steel but do not have the density required to be an effective cutting media for water jetting. Also, because all three of these products are silica-based, there is the added potential for causing silicosis from the fine dust generated when these products break down during the water jetting process.
  • the synthetic iron oxide product of the present invention overcomes the problems cited above regarding density and silicosis. Due to their higher densities, synthetic iron oxides make a faster, more efficient cutting media compared to the silica-based products. Synthetic iron oxide is silica- free, thus presenting no potential silicosis hazard from dust generated during the water jetting/cutting operations. Moreover, by combining their increased cutting efficiency with their elimination of silicosis hazard and lower overall cost, synthetic iron oxides offer a major improvement to the abrasive injected water jetting/cutting industry.
  • Scarfer spittings generally comprise a waste product from steel mills. Scarfing itself a process for removing surface defects from steel ingots, billets or bars by means of a gas torch, while scarfer spittings are the spherical-like waste particles of such process. Such scarfer spittings ranged in size from less than a 100-mesh sieve size to more than two inches. In the past, scarfer spittings were recycled in steel mills to recover the iron they contained. A portion of the scarfer spittings would be mixed with mill scale, ore fines and the like for use as part of the charge to a sinter strand.
  • the invention described and claimed herein not only comprises a synthetic iron oxide material comprising generally spheroidal and/or granular particles suitable for use as an additive to high pressure and ultra high pressure cutting and cleaning systems, and a method for using said material, but also comprises methods for processing waste products formed during the manufacture of iron and steel to produce reusable metallic products, and the media produced thereby.
  • novel synthetic iron oxide materials according to the present invention to be a suitable additive to high pressure and ultra high pressure water jetting for cutting solids such as metals, metal alloys or ceramics, or to clean surfaces (e.g., steel surfaces) of mill scale, rust and surface preparations (e.g., paint) .
  • the novel materials produced by one method according to the present invention when introduced into a water stream, enhance cutting performance and thus makes water jetting more effective and more competitive with prior art methods.
  • the characteristic features of one presently preferred embodiment of the invention include greater than 70% iron content, a specific gravity of about 5 to 6, and bulk density of approximately 180 pounds per cubic foot. It is preferred to use particles within the range of -30 to +100 mesh ASTM standard sieve size, although particle sizes above and below these mesh sizes can be used in special applications.
  • the synthetic iron oxide according to the present invention is its low cost. It may be produced by refining and melting iron or steel scrap into steel (as in traditional steel making technology) or from by- products of various iron and steel manufacturing processes such as steel making and steel abrasive manufacture.
  • the synthetic iron oxide according to the present invention may also be produced from by-products which result from the casting steel or iron, crushing steel shot in the production process of producing steel grit, or scarfing steel ingots, billets or blooms. Thus, it has the additional advantage of recycling what would otherwise be waste products.
  • the synthetic iron oxide according to the present invention is also magnetic and, therefore, easily recovered by magnetic separation for recycling or reuse.
  • synthetic iron oxides according to the present invention When used for cutting or cleaning steel, synthetic iron oxides according to the present invention have the additional advantage that, other than oxygen content, their chemical composition is similar to the steel surface. Accordingly, there is a greatly reduced potential for contamination.
  • the novel additive has good flow characteristics, which is necessary not only for the water jetting equipment to effectively operate but also for ease of use in traditional ballast applications. Precise metering of the product improves productivity. The flow characteristics are maintained by its particle shape and size distribution.
  • An additional advantage for blast cleaning is the novel compound has a hardness of 6 on the mohs scale versus 6.5-7.5 for garnet, but it has a specific gravity of 6 as opposed to garnet which only has a specific gravity of 3.5-4.3.
  • the synthetic iron oxide according to the present invention has approximately 40% more mass than garnet and an even greater percent of mass than the other mineral abrasives typically used in blast cleaning and cutting.
  • the novel synthetic iron oxides according to the present invention are more productive than most mineral abrasives due to the greater mass of iron oxide compared to other mineral abrasives.
  • the novel structure disclosed herein confers the advantage of increased productivity in water jetting or dry blasting.
  • Naturally occurring iron oxides break down too readily, thus dissipating energy in fracture and reducing the energy available for doing useful work.
  • Iron oxide is superior to garnet in other respects, such as cost and environmental impact.
  • the recovered spent abrasive may be used as an ingredient in cement manufacture or may be used for the manufacture of sinter or pellets for iron and steel making.
  • Slags covered by this invention are slags usable for cement additive as the slag by-product of blast furnace slag resulting from iron making or slags from basic oxygen furnace (BOF) and open hearth steel making.
  • the cement industry typically recovers the complex calcium, magnesium, aluminum silicates from such slag and wastes the iron rejects or reverts them to iron/steel manufacture.
  • the slag is generally granulated by high pressure water striking the molten slag, although other processes may be utilized in producing the base granulated slag.
  • the cement companies then utilize a magnetic separator to pull off iron rejects before final grinding of the complex calcium, magnesium, aluminum silicates.
  • Such highly abrasive iron rejects would otherwise be destructive to the cement companies' grinding mills. Accordingly, the cement companies typically avoided use of the iron rejects and recycle them back to iron and steel making manufacturers.
  • Figure 1 is a schematic of the process of making the novel synthetic iron oxides according to one embodiment of the present invention
  • Figure 2a illustrates the structure of one alternative embodiment (spheroidal) of the synthetic iron oxide according to the present invention under 15x magnification which is especially suitable for cutting steel plate (JETgrain) ;
  • Figure 2b illustrates the structure of another alternative embodiment (granular) of the synthetic iron oxide according to the present invention under 15x magnification which is especially suitable for cleaning a steel surface (JETgrit) ;
  • Figure 3 illustrates the structure of prior art garnet abrasives
  • Figures 4a and 4b are schematics of alternative prior art air assisted induction systems suitable for use with the synthetic iron oxides according to the present invention.
  • Figure 5 is an illustration of a typical Venturi nozzle induction system suitable for drawing the novel synthetic iron oxides according to the present of the invention into the water stream of a water jetting system, for the purposes of cleaning or cutting;
  • FIG. 6 is a schematic of the method of processing granulated slag/iron rejects according to another embodiment of the present invention. Detailed Description of the Preferred Embodiments
  • the starting material is an iron-bearing compound (in the preferred embodiment, steel) .
  • Scrap steel has been found to be suitable and has the advantage of being inexpensive and recycling what might otherwise be a waste product.
  • the steel is melted (1) , then impacted by high pressure water (2) in the presence of oxygen to create a synthetic iron oxide (3), with or without a steel core, having an essentially spheroidal structure (10) as shown in Figure 2.
  • the invention may be produced by the recovery of scarfing scale as produced by automatic or hand scarfing of steel surfaces.
  • the resulting granular products are processed in accordance with the flow chart shown in Figure 1.
  • Figure 2a is derived from a
  • a compound so made and having the particle shape and size distribution described below has been found to provide a suitable material for surface cleaning and preparation.
  • (11) of the synthetic iron oxide particles (3) (11) of the synthetic iron oxide particles (3) .
  • a compound so made and having the particle shape and size distribution described below has been found to provide a suitable material for cutting.
  • the synthetic iron oxide (3) may be dried, heated (5) so as to produce dry particles, air quenched (6) and classified according to grit size (7) . Should the resulting size distribution not be satisfactory, the synthetic iron oxide (3) may be subjected to further grinding (8) and classifying (9) until a suitable size distribution is obtained.
  • the experimental abrasives and conventional garnet abrasive were respectively introduced into a conventional water jetting fluid under high pressure of 10,000 psi and ultra high pressure water blasting of greater than 20,000 plus psi.
  • Each abrasive material is placed into abrasive hopper (20) and passes through abrasive metering valve (21) into a line (22) leading to nozzle (23) ; optionally, compressed air may be introduced into line (22) to assist in moving the abrasive along line (22) .
  • High pressure water (24) is also fed to nozzle (23) .
  • the abrasive material may be introduced as a wet slurry as shown in Figure 4b, where water (25) is added to the abrasive in mixing hopper (26) to form a water/abrasive slurry before entering line (22) , and where a slurry pump (27) is added to line (22) to assist in pumping the slurry to nozzle (23) .
  • the abrasive is mixed with the high pressure water (24) at the nozzle (23) , as shown in greater detail in Figure 5, by means of a conventional Venturi induction chamber (28) .
  • the abrasive-laden high pressure water (29) was directed against the target material.
  • compositions according to this first embodiment of the present invention may be Used to blast clean steel bridges, water towers, standpipes, railcars, ship hulls, ship tanks, ship decks, pipelines and numerous other coated surfaces. They may also be used as an abrasive additive to cut steel pipe, steelplate, steel beams or steel fabricated structures using ultra high pressure water jetting systems (greater than 20,000 psi) .
  • ultra high pressure water jetting systems greater than 20,000 psi
  • FIG. 6 there is shown a schematic of the method of processing air-cooled, water-cooled and granulated slag or iron rejects according to another embodiment of the present invention.
  • Iron rejects of cement manufacturing using granulated iron slag is fed into a first holding means (e.g., the hopper of suitable pulverizing means) at step (100) .
  • the input may optionally be dried at step (102) .
  • Suitable pulverizing means may comprise any conventional slow-speed or medium-speed pulverizing means such as those described below.
  • High-speed pulverizing means e.g., hammer mills and comb crushers
  • Conventional slow-speed pulverizing means typically consist of a rotating drum with a tumbling charge of steel balls. They are, for example, used for all types of coal but are particularly adaptable to abrasive materials such as anthracite, iron slag, and steel slag.
  • Exemplary of such slow- speed pulverizing means are "ball mills" (i.e., pulverizers that consist of a horizontal rotating cylinder, up to three diameters in length, containing a charge of tumbling or cascading steel balls, pebbles, or rods) or "ball grinders".
  • Medium-speed pulverizing means are used, for example, for all grades of bituminous coal, and may suitably comprise the contrarotation ball-race type or the bowl and roller type.
  • One particularly suitable type of bowl and roller type is a "ring-roller mill" in which material is fed past spring-loaded rollers that apply force against the sides of a revolving bowl. While a vibratory ball mill is preferably used according to this second embodiment of the present invention, any mechanical conditioning enabling the production of metallic granules comprising a plurality of distinct sizes would be suitable.
  • the milled product output from step (104) is then air classified and mechanically sized at step (106) to separate metallic product contained within the milled product from a first fines revert product which may be suitably recycled at step (108) to a cement manufacturer.
  • the metallic product (which may still contain residual non-magnetic reverts) is then magnetically classified at step (110) to separate such non-magnetic reverts contained within the metallic product from a refined product.
  • a cyclone impactor may be optionally utilized at step (112) one or more times for further refinement of the refined product.
  • the refined product is again air classified at step (114) to separate metallic granules comprising a plurality of distinct sizes from a second fines revert product.
  • Such second fines revert product may then be recycled at step (116) to a cement manufacturer.
  • the metallic granules output from step (114) may then be screened as the market dictates to produce separate supplies of the plurality of distinct sizes. For example, a market grade #8 sieve is used at step (118) to segregate metallic granules of a first distinct size for use as bottom pour. The output from step (118) is then screened on a market grade #12 sieve at step (120) to segregate metallic granules of a second distinct (e.g., G-25) size. Next, the output from step (120) is screened on a market grade #18 sieve at step (122) to segregate metallic granules of a third distinct (e.g., G-40) size.
  • a market grade #8 sieve is used at step (118) to segregate metallic granules of a first distinct size for use as bottom pour.
  • the output from step (118) is then screened on a market grade #12 sieve at step (120) to segregate metallic granules of
  • step (122) is then screened on a market grade #24 sieve at step (124) to segregate metallic granules of a fourth distinct (e.g., G-50) size.
  • step (124) is screened on a market grade #35 sieve at step (126) to segregate metallic granules of a fifth distinct (e.g., G-80) size.
  • step (126) is finally screened on a market grade #50 sieve at step (128) to segregate metallic granules of a sixth distinct suitable for use as bottom pour, high density media (i.e., ballast media), or water jet abrasives.
  • high density media i.e., ballast media
  • any number of distinctly sized metallic granules may be segregated according to this embodiment of the present invention by substituting other or more market grade sieves.
  • the output from each sieve may suitably be stored in second and subsequent holding means such as those shown at steps (130) through (140) in Figure 5.
  • Such distinctly sized and segregated metallic granules may then be blended together, or with other media (e.g., METgrainTM) for use as abrasives, ballast, and bottom pour.
  • media e.g., METgrainTM
  • this novel media In use as an abrasive, for example, this novel media has been tested using a conventional Ervin Durability tester with a standard test procedure which is widely recognized for steel shot and grit. As shown in Table 7 on the following page, this novel media demonstrated a recyclability factor in excess of 100 cycles before 100% replacement. In actual field usage, it can be expected that this novel media will readily achieve a minimum of 20 reuses which, in turn, means a reduction of about 95% of the generated dust and waste versus conventional, single-use mineral abrasives such as garnet.
  • each product listed in Table 7 represents the iron rejects from different granulated iron making slags, as processed according to this second embodiment of the present invention. Moreover, such product was screened to the size Table 7 Test for Recyclability as an Abrasive for Blast Cleaning
  • the take out screen for spent abrasive was an ASTM standard #50 mesh.
  • the crushed or granulated slag generated by steel mills is composed of non-magnetic particles or magnetic particles containing a high percentage of non-ferrous product.
  • Granulated slag as an iron making by ⁇ product utilized by cement makers is of low iron content.
  • the iron fines (i.e., iron rejects) by ⁇ products typically contain about 30% to 70% or iron or more.
  • One distinct benefit of the methods according to this second embodiment of the present invention is the relative purity of the finished media.
  • novel media easily obtains a 90% iron purity, and preferably 95% or higher. This more highly concentrated product thereby yields a medium with high specific gravities, as demonstrated by the data set forth in Table 8 on the following page.
  • the novel media according to this second embodiment of the present invention preferably have a specific gravity of 6.0 or more, and even more preferably 7.0 or more. If desired, hematite and agnatite may be added to the novel media to achieve higher packing densities for use in ballast media.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Procédé de production d'oxyde de fer de structure essentiellement sphéroïdale. De la ferraille (1) est fondue puis percutée par de l'eau à haute pression (2) en présence d'oxygène pour former un oxyde de fer synthétique (3). Si l'on désire un matériau présentant une structure granulaire, on lui fait subir une nouvelle étape de concassage, de broyage ou de percussion (4). L'oxyde de fer synthétique est ensuite séché, chauffé (5), refroidi par air (6) et trié selon la taille des particules (7). Il peut ensuite être soumis à une nouvelle étape de broyage (8) et de triage (9) jusqu'à obtention d'une distribution granulométrique appropriée.
PCT/US1996/016839 1995-10-17 1996-10-17 Procede de traitement de materiaux contenant du fer et produits ainsi obtenus WO1997014760A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54403595A 1995-10-17 1995-10-17
US08/544,035 1995-10-17

Publications (1)

Publication Number Publication Date
WO1997014760A1 true WO1997014760A1 (fr) 1997-04-24

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0894571A1 (fr) * 1997-07-29 1999-02-03 JAPAN METALS & CHEMICALS CO., LTD. Matériau de grenaillage
DE10042806A1 (de) * 2000-08-30 2002-03-28 Wap Reinigungssysteme Reinigungsmittel für die Hoch- und Niederdruckreinigung
FR2959679A1 (fr) * 2010-05-05 2011-11-11 Fives Fcb Procede de broyage d'une matiere minerale contenant au moins du calcium et des impuretes metalliques, et installation convenant pour le broyage d'une matiere minerale contenant du calcium et des impuretes metalliques en tant que tels.
WO2012009925A1 (fr) * 2010-07-19 2012-01-26 北京科技大学 Procédé de réutilisation non polluant pour des déchets métalliques de meulage à base de fer
CN109202661A (zh) * 2018-08-02 2019-01-15 银川特种轴承有限公司 一种全自动轴承送料除锈清洗烘干生产线

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US2059915A (en) * 1934-05-21 1936-11-03 John E Ruch Method of cleaning metal and material therefor
US2563064A (en) * 1945-11-01 1951-08-07 American Wheelabrator & Equipm Process and apparatus for the production of metallic shot
US2895816A (en) * 1955-06-16 1959-07-21 Chalmer R Cline Steel grit and method for manufacturing same
US3885744A (en) * 1974-05-20 1975-05-27 Air Prod & Chem Method and apparatus for crushing and separating scrap material
US4115076A (en) * 1977-05-24 1978-09-19 Bethlehem Steel Corporation Abrasive material suitable for manually blast cleaning ferrous metals prior to painting
US4190422A (en) * 1977-05-24 1980-02-26 Bethlehem Steel Corporation Metallic abrasive produced from a steel mill waste material
US4666591A (en) * 1984-01-10 1987-05-19 Kawasaki Jukogyo Kabushiki Kaisha Slag disposal method
US4729770A (en) * 1986-04-11 1988-03-08 Pyrene Chemical Services Limited Processes and compositions for abrasive blast cleaning
US4747547A (en) * 1986-06-11 1988-05-31 Nippon Jiryoku Senko Co., Ltd. Process for the treatment of slag generated in an ironworks
US4817342A (en) * 1987-07-15 1989-04-04 Whitemetal Inc. Water/abrasive propulsion chamber
US5336421A (en) * 1990-11-22 1994-08-09 Toda Kogyo Corp. Spinel-type spherical, black iron oxide particles and process for the producing the same
US5462605A (en) * 1992-08-03 1995-10-31 Szuecs; Johann Apparatus and method for treating sensitive surface, in particular of sculpture
US5476411A (en) * 1993-07-16 1995-12-19 Henkel Corporation Aqueous composition for wet sanding of dried paint, plastics, and the like

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2059915A (en) * 1934-05-21 1936-11-03 John E Ruch Method of cleaning metal and material therefor
US2563064A (en) * 1945-11-01 1951-08-07 American Wheelabrator & Equipm Process and apparatus for the production of metallic shot
US2895816A (en) * 1955-06-16 1959-07-21 Chalmer R Cline Steel grit and method for manufacturing same
US3885744A (en) * 1974-05-20 1975-05-27 Air Prod & Chem Method and apparatus for crushing and separating scrap material
US4115076A (en) * 1977-05-24 1978-09-19 Bethlehem Steel Corporation Abrasive material suitable for manually blast cleaning ferrous metals prior to painting
US4190422A (en) * 1977-05-24 1980-02-26 Bethlehem Steel Corporation Metallic abrasive produced from a steel mill waste material
US4666591A (en) * 1984-01-10 1987-05-19 Kawasaki Jukogyo Kabushiki Kaisha Slag disposal method
US4729770A (en) * 1986-04-11 1988-03-08 Pyrene Chemical Services Limited Processes and compositions for abrasive blast cleaning
US4747547A (en) * 1986-06-11 1988-05-31 Nippon Jiryoku Senko Co., Ltd. Process for the treatment of slag generated in an ironworks
US4817342A (en) * 1987-07-15 1989-04-04 Whitemetal Inc. Water/abrasive propulsion chamber
US5336421A (en) * 1990-11-22 1994-08-09 Toda Kogyo Corp. Spinel-type spherical, black iron oxide particles and process for the producing the same
US5462605A (en) * 1992-08-03 1995-10-31 Szuecs; Johann Apparatus and method for treating sensitive surface, in particular of sculpture
US5476411A (en) * 1993-07-16 1995-12-19 Henkel Corporation Aqueous composition for wet sanding of dried paint, plastics, and the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0894571A1 (fr) * 1997-07-29 1999-02-03 JAPAN METALS & CHEMICALS CO., LTD. Matériau de grenaillage
DE10042806A1 (de) * 2000-08-30 2002-03-28 Wap Reinigungssysteme Reinigungsmittel für die Hoch- und Niederdruckreinigung
FR2959679A1 (fr) * 2010-05-05 2011-11-11 Fives Fcb Procede de broyage d'une matiere minerale contenant au moins du calcium et des impuretes metalliques, et installation convenant pour le broyage d'une matiere minerale contenant du calcium et des impuretes metalliques en tant que tels.
WO2011151534A1 (fr) 2010-05-05 2011-12-08 Fives Fcb Procede et installation de broyage d'une matiere minerale contenant au moins du calcium et des impuretes metalliques
CN102933305A (zh) * 2010-05-05 2013-02-13 菲弗斯有限公司 研磨至少含有钙和金属杂质的矿物材料的方法和适于研磨所述含钙和金属杂质的矿物材料的设备
RU2557593C2 (ru) * 2010-05-05 2015-07-27 Фив Фсб Способ измельчения минерального сырья, содержащего по меньшей мере кальций и металлические примеси, и установка для его осуществления
US10569277B2 (en) 2010-05-05 2020-02-25 Fives Fcb Method of grinding a mineral material containing at least calcium and metal impurities, and plant suitable for grinding a mineral material containing calcium and metal impurities as they stand
WO2012009925A1 (fr) * 2010-07-19 2012-01-26 北京科技大学 Procédé de réutilisation non polluant pour des déchets métalliques de meulage à base de fer
US9796022B2 (en) 2010-07-19 2017-10-24 University Of Science And Technology Beijing Pollution-free method for recycling iron-based grinding waste
CN109202661A (zh) * 2018-08-02 2019-01-15 银川特种轴承有限公司 一种全自动轴承送料除锈清洗烘干生产线

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