WO2008098525A1 - The sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys - Google Patents

The sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys Download PDF

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Publication number
WO2008098525A1
WO2008098525A1 PCT/CZ2007/000100 CZ2007000100W WO2008098525A1 WO 2008098525 A1 WO2008098525 A1 WO 2008098525A1 CZ 2007000100 W CZ2007000100 W CZ 2007000100W WO 2008098525 A1 WO2008098525 A1 WO 2008098525A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
percent
production
granulate
sand mixture
Prior art date
Application number
PCT/CZ2007/000100
Other languages
French (fr)
Inventor
Ladislav Hanecka
Original Assignee
Bxb Group S.R.O.
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 Bxb Group S.R.O. filed Critical Bxb Group S.R.O.
Publication of WO2008098525A1 publication Critical patent/WO2008098525A1/en

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Classifications

    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F8/00—Manufacture of articles from scrap or waste metal particles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/0038—Obtaining aluminium by other processes
    • C22B21/0069—Obtaining aluminium by other processes from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F2009/001—Making metallic powder or suspensions thereof from scrap particles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
    • 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 technical solution concerns the composition of sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys, used mainly as deoxidizing addition into the melt at production of the steel.
  • the above mentioned target is reached through technical solution of sand mixture for the production of the shaped pieces on the basis of fine granulated aluminum or its alloys, wherein the essence of the solution consists in fact that the mixture contains 85 to 99 percent by weight of granulate with grain size in the range of values from 0.001 to 4.5mm and 1 to 15 percent by weight of bond, where bond consists of water dilution of hardener and binder, completed eventually with linseed oil.
  • the hardener is chosen form the group of materials including sodium silicate and potassium silicate and that the binder is created by glucose high molecular polymer preferably with modified starch.
  • the components of the bond are created by the mixture of 0.01 to 7 percent by weight of hardener, 0.01 to 7 percent by weight of binder, 1 to 10 percent by weight of water, eventually completed with 0.01 to 5 percent by weight of the linseed oil.
  • the preparation of the mixture runs in mixing device, into which are dosed, in strictly set order, its particular ingredients; mean granulate, the hardener and the binder with the water and eventually the linseed oil.
  • the hardener and the binder are mixed with the water in given rates and sprayed into mixing device on aluminum granulate.
  • This forms compact viscosity sufficient material, which is ready for stamping on matrices of cylinder rotary press.
  • the whole process is continual with precise setting of dosing of each component.
  • the technical solution can be advantageously used at the production of granulates, used especially as deoxidizing additions into steels smelt, but also of granulates used for another industry fields, for example in chemical production.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The sand mixture for the production of shaped pieces on the basis of fine grain aluminum granulate or its alloys. The subject matter of the invention consists in the fact that the mixture contains 85 to 99 percent by weight of granulate with the grain size in the range of values from 0.001 to 4.5 mm and 1 to 15 percent by weight of the bond, where the bond consists of water solution of the hardener and the binder, eventually completed with the linseed oil.

Description

The sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys
Art Domain
The technical solution concerns the composition of sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys, used mainly as deoxidizing addition into the melt at production of the steel.
Present prior art
For the production of granulates from aluminum scrap, used as deoxidizing additions into the melt at steel production, are being used several methods. The oldest and the most frequent method is re-melting of aluminum scrap in gas or electric smelting furnaces. The granulate is produced by dispersion and fast cooling of liquid metal with irregular shape of the particles. At sudden cooling rises on the surface of the granules oxidized crust, which is only mildly disadvantageous at final use of granulate, because does not have any vital influence on final quality of produced steel, into whose molten mass is added. Among the disadvantages of this method of production belongs high energy demand factor of the production process where furthermore rise dangerous wastes as slags and scrapings and which is also associated with the rise of emissions from smelting furnaces.
Further known method of production of aluminum granulate is multiple grinding of sheet metal in hammer grinders with different perimeters of sieves. Arisen grit is then sorted on the separators, which separate particular particles according to their weight into different fractions, only some of these can be used for the purposes of steel deoxidizing. The fractions with small specified weight of the particles would by sucked into suction pipes or would burn immediately at infilling into smelting on the surface of the smelt and would not have any deoxidizing effect. The disadvantage of this method of the production is apart from arise of different fractions also high energy demand factor.
This severity is also characteristic for the method of aluminum scrap grinding on adjusted hammer grinder without sieves or even with them, where comes to gradual palletizing of particular aluminum pieces. Rising pellets have different dimensions, shapes and sizes and for the use of steel deoxidizing must be consequently sorted on sieves with meshes according to relevant norms or claims of the customer. This is also labour intensive and complicated, whereas the non-disintegration of pellets at longer time storage is not guaranteed.
Likewise it is known the way of processing of aluminum scrap according to CZ patent 297501 , where the entering material is after sorting into particular material classes in first phase adjusted in order to reach the straight and flat pieces, which are then sorted according to the width into different categories from thinnest to thickest, and in the second phase is this way sorted material shaped into sheet metals or straight wires, which are then cut and after sorting according to the weight stamped in matrices into desired shape and size of the granulate. At this way of processing of the aluminum scrap arises certain part of particles with granulity in the range of values from 0.001 mm to 4.5mm, whose stamping into shaped pieces by the use of classical methods is practically impossible because it is not possible to guarantee their non-disintegration and further parameters, which are normative given and required for following processing of the shaped pieces.
The introduced solution is proposed to put forward to use such composition of sand mixture for the production of shaped pieces which would enable processing of the fractions of fine grained aluminum granulate or its alloys at keep of normative required conditions of the shaped pieces for further use. The essence of the technical solution
The above mentioned target is reached through technical solution of sand mixture for the production of the shaped pieces on the basis of fine granulated aluminum or its alloys, wherein the essence of the solution consists in fact that the mixture contains 85 to 99 percent by weight of granulate with grain size in the range of values from 0.001 to 4.5mm and 1 to 15 percent by weight of bond, where bond consists of water dilution of hardener and binder, completed eventually with linseed oil.
The further essence of the solution is that the hardener is chosen form the group of materials including sodium silicate and potassium silicate and that the binder is created by glucose high molecular polymer preferably with modified starch.
In advantageous carry out the components of the bond are created by the mixture of 0.01 to 7 percent by weight of hardener, 0.01 to 7 percent by weight of binder, 1 to 10 percent by weight of water, eventually completed with 0.01 to 5 percent by weight of the linseed oil.
At the use of given mixture for stamping of fine grained granulate is guaranteed creation of compact product in the form of shaped piece, which is possible to trouble free use in further processing in the steel works at the production of steel.
The examples of carry out of the solution
The particular examples of the mixture composition according to the technical solution are these:
Example 1 :
- Aluminum granulate with grain size in the range of values from 0.5 to 1.5mm 90 percent by weight
- Sodium water glass [Na2O. nSiO2] 5 percent by weight
- Modified starch 2.5 percent by weight
- Water 2.5 percent by weight
Example 2:
- Aluminum granulate with grain size in the range of values from 0.001 to 0.5mm 95 percent by weight
- Potassium water glass [K2O. nSiO2] 2 percent by weight
- Modified starch 1 percent by weight
-Water 2 percent by weight
Example 3:
- Aluminum granulate with grain size in the range of values from 1.5 to 4.5mm 85 percent by weight
- Sodium water glass [Na2O. nSiO2] 6 percent by weight
- Modified starch 4 percent by weight
- Linseed oil 1 percent by weight
-Water 4 percent by weight
The preparation of the mixture runs in mixing device, into which are dosed, in strictly set order, its particular ingredients; mean granulate, the hardener and the binder with the water and eventually the linseed oil. The hardener and the binder are mixed with the water in given rates and sprayed into mixing device on aluminum granulate. Herewith forms compact viscosity sufficient material, which is ready for stamping on matrices of cylinder rotary press. The whole process is continual with precise setting of dosing of each component.
The industrial utility
The technical solution can be advantageously used at the production of granulates, used especially as deoxidizing additions into steels smelt, but also of granulates used for another industry fields, for example in chemical production.

Claims

C L A I M S
1. The sand mixture for the production of shaped pieces on the basis of fine grain aluminum granulate or its alloys, wherein the mixture contains 85 to 99 percent by weight of granulate with the grain size in the range of values from 0.001 to 4.5 mm and 1 to 15 percent by weight of the bond, where the bond consists of water solution of the hardener and the binder, eventually completed with the linseed oil.
2. The sand mixture according to the claim 1 , wherein the hardener is chosen from the group of materials including sodium silicate and potassium silicate.
3. The sand mixture according to the claim 1 , wherein the binder is created by high molecular glucose polymer, preferably by modified starch.
4. The sand mixture according to the claims 1 to 3, wherein the bond components are created by the mixture of 0.01 to 7 percent by weight of the hardener, 0.01 to 7 percent by weight of the binder, 1 to 10 percent by weight of the water, eventually completed with 0.01 to 5 percent by weight of linseed oil.
PCT/CZ2007/000100 2007-02-14 2007-11-07 The sand mixture for the production of shaped pieces on the basis of fine grained aluminum granulate or its alloys WO2008098525A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPUV2007-18555 2007-02-14
CZ200718555U CZ17399U1 (en) 2007-02-14 2007-02-14 Sand mixture for manufacture of shaped products based on fine-grain granulate of aluminium or alloys thereof

Publications (1)

Publication Number Publication Date
WO2008098525A1 true WO2008098525A1 (en) 2008-08-21

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CZ (1) CZ17399U1 (en)
WO (1) WO2008098525A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115011794A (en) * 2022-06-27 2022-09-06 中南大学 Binder for forming silica fume, and preparation method and application thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934353A (en) * 1960-04-07 1963-08-14 F H Lloyd & Company Ltd Improvements in or relating to cores and moulds for use in casting
GB1377071A (en) * 1972-07-12 1974-12-11 Foseco Int Foundry moulding sand compositions
GB1418381A (en) * 1972-05-29 1975-12-17 Cashew Co Ltd Method of making casting moulds
JPS5536094A (en) * 1978-09-08 1980-03-13 Yoshiyo Hatano Molding sand of good disintegrating quality
US4505750A (en) * 1983-11-25 1985-03-19 Venture Chemicals, Inc. Foundry mold and core sands
WO2003018850A1 (en) * 2001-08-30 2003-03-06 Avestapolarit Aktiebolag (Publ) Method in the manufacture of steel
EP1726666A1 (en) * 2004-02-25 2006-11-29 JTEKT Corporation Briquette as steelmaking raw material and process for producing the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934353A (en) * 1960-04-07 1963-08-14 F H Lloyd & Company Ltd Improvements in or relating to cores and moulds for use in casting
GB1418381A (en) * 1972-05-29 1975-12-17 Cashew Co Ltd Method of making casting moulds
GB1377071A (en) * 1972-07-12 1974-12-11 Foseco Int Foundry moulding sand compositions
JPS5536094A (en) * 1978-09-08 1980-03-13 Yoshiyo Hatano Molding sand of good disintegrating quality
US4505750A (en) * 1983-11-25 1985-03-19 Venture Chemicals, Inc. Foundry mold and core sands
WO2003018850A1 (en) * 2001-08-30 2003-03-06 Avestapolarit Aktiebolag (Publ) Method in the manufacture of steel
EP1726666A1 (en) * 2004-02-25 2006-11-29 JTEKT Corporation Briquette as steelmaking raw material and process for producing the same

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
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CHANDRAPA K G ET AL: "PROPRIETES PHYSIQUES ET THERMIQUES DES SABLES AUTODURCISSANTS LIES AU SILICATE DE SOUDE", FONDERIE, FONDEUR D'AUJOURD'HUI, EDITIONS TECHNIQUES DES INDUSTRIES DE LA FONDERIE, SEVRES, FR, no. 83, 1 March 1989 (1989-03-01), pages 25 - 34, XP000026695, ISSN: 0249-3136 *
ELLINGHAUS W: "KERNHERSTELLUNGSVERFAHREN DER NEUNZIGER JAHRE", GIESSEREI, GIESSEREI VERLAG, DUSSELDORF, DE, vol. 80, no. 5, 8 March 1993 (1993-03-08), pages 142 - 146, XP000360587, ISSN: 0016-9765 *
LEMON P: "MODERN SAND BINDERS -A REVIEW", FOUNDRY TRADE JOURNAL, INSTITUTE OF CAST METALS ENGINEERS, WEST BROMWICH, GB, vol. 163, no. 3403, 8 December 1989 (1989-12-08), pages 922 - 924,926, XP000103750, ISSN: 0015-9042 *
SAMUEL M: "A new technique for recycling aluminium scrap", J MATER PROCESS TECHNOL; JOURNAL OF MATERIALS PROCESSING TECHNOLOGY APR 1 2003, vol. 135, no. 1, 1 April 2003 (2003-04-01), pages 117 - 124, XP002482905 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115011794A (en) * 2022-06-27 2022-09-06 中南大学 Binder for forming silica fume, and preparation method and application thereof

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