WO2001031073A1 - A process and apparatus for the removal of a contaminant from slag - Google Patents
A process and apparatus for the removal of a contaminant from slag Download PDFInfo
- Publication number
- WO2001031073A1 WO2001031073A1 PCT/GB2000/004096 GB0004096W WO0131073A1 WO 2001031073 A1 WO2001031073 A1 WO 2001031073A1 GB 0004096 W GB0004096 W GB 0004096W WO 0131073 A1 WO0131073 A1 WO 0131073A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slag
- decontamination
- fluids
- decontamination process
- contaminant
- Prior art date
Links
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
- 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
-
- 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
-
- 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
- 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
- C22B7/006—Wet processes
-
- 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
-
- 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 a process for the removal of a contaminant.
- the present invention relates a process for the removal of a contaminant from a by-product. More particularly, the present invention relates to a process for the removal of undesirable contaminants from slag produced during the smelting or refining of metals and like products. Additionally, the present invention provides an apparatus suitable for carrying out such process.
- a by-product molten material commonly known as slag, is produced from the various input constituents in the furnace when it reaches 1400-1600°C.
- the resultant slag is subsequently removed and quenched with water to produce a granulated solid material, which is then milled and classified.
- the current method utilised to treat the slag for the removal of the undesirable contaminants therefrom, for example, calcium and magnesium, is to weather the slag in windrows that are periodically turned and managed for a period of up to one year. Such treatment is necessary before being able to utilise the treated or decontaminated slag in any substantial quantity.
- a decontamination process for the treatment of slag including the steps of pre-treating the contaminated slag with a process fluid containing at least one chemical; and subjecting the mixture of contaminated slag and process fluid to ultrasound.
- a decontamination process in accordance with the present invention at least addresses the problems outlined above.
- the process in accordance with the present invention is able to handle the very large annual tonnage of slag produced as a by-product in the metal industry, it is energy efficient, it requires minimal man time input, it negates the contaminated run off water concerns and results in a decontaminated mineral or product that can be used in a wide range of important and value added applications, for example, in the production of acoustic panels, non-slip paints, fire retardant coatings, concrete block production etc.
- the recovered or reclaimed metals can be used.
- an apparatus for carrying out the decontamination process in accordance with the present invention including: a first tank into which the slag and process fluids are added; at least one ultrasonic processor through which the slag and process fluids are passed; means for transporting the slag and process fluids from the first tank through the at least one ultrasonic processor and means for separating the process fluids from the decontaminated slag.
- Figure 1 is a schematic illustration of a plant suitable for carrying out the process of the present invention.
- a plant in accordance with the present invention includes a conveyor 10 to load the slag piles 20 into a pre-mix and treatment tank 11 , which contains a chemical mixture, the choice of which is directly dependent on the intended use of the processed slag and the resultant form of the slag, such as colour.
- the chemical mixture may include any one of the following, namely, hydrochloric acid, a surfactant, preferably an ionic surfactant, sulphuric acid, brine, carbon dioxide and depending on the desired colour, may also include hydrogen peroxide, acetic acid, ammonia etc.
- the resultant mixture of slag and desired chemicals are then transported from the pre-mix tank 11 to a series of ultrasonic processors 13.
- such transportation is effected by the patented Tore ® system which is able to move very high-density materials, such as slag, with very high solid loadings, with high efficiency and low energy inputs.
- the mixture of slag and chemicals are subjected to a sonochemical reaction that results in the rapid dissolving and removal of the contaminant on the slag from both external and internal surfaces of the slag or base material.
- the action of the ultrasound processors 13 forces the chemicals into the inner pore structure of the by-product materials, thereby enabling a deep decontamination to take place.
- An ultrasonic processor suitable for this application is disclosed in our European Patent Application No 96922160.5, the contents of which are incorporated herein by reference.
- a dewatering screen 14 for example, a three deck separator sieve, whereby the now separate cleaned solids materials can be considered as ready for immediate use or may be size classified and dried depending on the chosen end use, for example, cement production, railway clinker, wall block production etc.
- the process chemicals which result from the sonochemical process, after sieving, can then be recycled back into the pre-mix vessel 11 and the necessary chemical levels, for example, pH or alkalinity, can be monitored and maintained as required.
- the recycled fluids can be centrifuged to recover, for example, calcium chloride and magnesium chloride, which subsequent to being dried can be sold back into the chemical industry for use.
- process and process plant of the present invention can be utilised to treat or decontaminate any type of slag or like product produced as a by-product during the smelting or refining or production of metals.
- process and apparatus in accordance with the present invention can be used to decontaminate any by-product of any metal production process.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20000971566 EP1224338A1 (en) | 1999-10-23 | 2000-10-23 | A process and apparatus for the removal of a contaminant from slag |
KR1020027005041A KR20020047254A (en) | 1999-10-23 | 2000-10-23 | A process and apparatus for the removal of a contaminant from slag |
AU10405/01A AU771045B2 (en) | 1999-10-23 | 2000-10-23 | A process and apparatus for the removal of a contaminant from slag |
CA 2388458 CA2388458A1 (en) | 1999-10-23 | 2000-10-23 | A process and apparatus for the removal of a contaminant from slag |
JP2001533206A JP2003512533A (en) | 1999-10-23 | 2000-10-23 | Method and apparatus for removing contaminants from slag |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9925018A GB9925018D0 (en) | 1999-10-23 | 1999-10-23 | A process for the removal of a contaminant |
GB9925018.5 | 1999-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001031073A1 true WO2001031073A1 (en) | 2001-05-03 |
Family
ID=10863192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/004096 WO2001031073A1 (en) | 1999-10-23 | 2000-10-23 | A process and apparatus for the removal of a contaminant from slag |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1224338A1 (en) |
JP (1) | JP2003512533A (en) |
KR (1) | KR20020047254A (en) |
CN (1) | CN1382225A (en) |
AU (1) | AU771045B2 (en) |
CA (1) | CA2388458A1 (en) |
GB (1) | GB9925018D0 (en) |
WO (1) | WO2001031073A1 (en) |
ZA (1) | ZA200203158B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI122348B (en) | 2008-05-30 | 2011-12-15 | Rautaruukki Oyj | A process for the production of calcium carbonate from waste and by-products |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53125295A (en) * | 1977-04-09 | 1978-11-01 | Kowa Seikou Kk | Method of treating slag and like |
JPS59133304A (en) * | 1983-01-19 | 1984-07-31 | Nippon Steel Corp | Method for accelerating aging of slag cooled slowly in blast furnace |
US5549811A (en) * | 1992-05-29 | 1996-08-27 | Unimetal Societe Francaise Des Aciers Longs | Process for decontamination soils polluted with metals |
DE19708411A1 (en) * | 1997-03-03 | 1998-09-17 | Muesing Anton Gmbh Co Kg | Method and device for processing material |
DE19723607A1 (en) * | 1997-06-05 | 1998-12-10 | Wolfgang Dr Ing Schuldes | Decontamination of soils, slurries, etc. with almost complete breakdown of contaminants |
-
1999
- 1999-10-23 GB GB9925018A patent/GB9925018D0/en not_active Ceased
-
2000
- 2000-10-23 AU AU10405/01A patent/AU771045B2/en not_active Ceased
- 2000-10-23 CN CN00814744A patent/CN1382225A/en active Pending
- 2000-10-23 WO PCT/GB2000/004096 patent/WO2001031073A1/en not_active Application Discontinuation
- 2000-10-23 CA CA 2388458 patent/CA2388458A1/en not_active Abandoned
- 2000-10-23 JP JP2001533206A patent/JP2003512533A/en active Pending
- 2000-10-23 EP EP20000971566 patent/EP1224338A1/en not_active Withdrawn
- 2000-10-23 KR KR1020027005041A patent/KR20020047254A/en not_active Application Discontinuation
-
2002
- 2002-04-22 ZA ZA200203158A patent/ZA200203158B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53125295A (en) * | 1977-04-09 | 1978-11-01 | Kowa Seikou Kk | Method of treating slag and like |
JPS59133304A (en) * | 1983-01-19 | 1984-07-31 | Nippon Steel Corp | Method for accelerating aging of slag cooled slowly in blast furnace |
US5549811A (en) * | 1992-05-29 | 1996-08-27 | Unimetal Societe Francaise Des Aciers Longs | Process for decontamination soils polluted with metals |
DE19708411A1 (en) * | 1997-03-03 | 1998-09-17 | Muesing Anton Gmbh Co Kg | Method and device for processing material |
DE19723607A1 (en) * | 1997-06-05 | 1998-12-10 | Wolfgang Dr Ing Schuldes | Decontamination of soils, slurries, etc. with almost complete breakdown of contaminants |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Week 197849, Derwent World Patents Index; AN 1978-88682A, XP002159141, "Reclaiming useful compounds from slag from iron or copper production" * |
DATABASE WPI Week 198436, Derwent World Patents Index; AN 1984-223108, XP002159142, "Acceleration of ageing treatment of slowly-cooled blast furnace slag" * |
Also Published As
Publication number | Publication date |
---|---|
ZA200203158B (en) | 2003-08-27 |
EP1224338A1 (en) | 2002-07-24 |
AU771045B2 (en) | 2004-03-11 |
CN1382225A (en) | 2002-11-27 |
KR20020047254A (en) | 2002-06-21 |
CA2388458A1 (en) | 2001-05-03 |
GB9925018D0 (en) | 1999-12-22 |
JP2003512533A (en) | 2003-04-02 |
AU1040501A (en) | 2001-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4305726A (en) | Method of treating coal to remove sulfur and ash | |
JP5149163B2 (en) | Processing process of dust and residue containing zinc oxide and zinc ferrite discharged from electric furnaces and other furnaces | |
US4889640A (en) | Method and mixture for treating hazardous wastes | |
US5268128A (en) | Method and apparatus for cleaning contaminated particulate material | |
Pong et al. | Spent potlining–a hazardous waste made safe | |
CA1216008A (en) | Treatment of scrap lining material from aluminium reduction cells | |
JP6989844B2 (en) | Friedel salt removal method and Friedel salt removal system | |
JP2006015190A (en) | Method for treating fly ash | |
CA2367544A1 (en) | Method for spent potliner processing, separating and recycling the products therefrom | |
Qi et al. | A review of blasting waste generation and management in the ship repair industry | |
EP1762309A2 (en) | Improvements in and relating to waste processing | |
AU771045B2 (en) | A process and apparatus for the removal of a contaminant from slag | |
JP5359197B2 (en) | Waste chromium removal method and chromium removal apparatus | |
JP3924981B2 (en) | Waste material processing method for cement | |
JP2004082100A (en) | Method and system for recycling incineration residue | |
RU2569133C2 (en) | Method for deoiling magnetoactive solid wastes | |
EP0060354B1 (en) | Method of treating coal to remove sulphur and ash | |
JP3851206B2 (en) | Fly ash treatment method | |
WO1998024938A1 (en) | Extraction of metals from heavy metal-bearing wastes | |
JPS58137497A (en) | Treatment of heavy metal-containing waste matter | |
Mulopo et al. | Recovery of calcium carbonate from waste gypsum and utilization for remediation of acid mine drainage from coal mines | |
JP3273316B2 (en) | Plastic mixed waste treatment method | |
US6696617B1 (en) | Process for treating complex cyanide | |
JPH11300310A (en) | Treatment of fly ash | |
JPH03169384A (en) | Method of disposing of used cell |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1020027005037 Country of ref document: KR Ref document number: 2388458 Country of ref document: CA Ref document number: 1020027005041 Country of ref document: KR |
|
ENP | Entry into the national phase |
Ref document number: 2001 533206 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 008147442 Country of ref document: CN Ref document number: IN/PCT/2002/596/CHE Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10405/01 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2000971566 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2002 2002113449 Country of ref document: RU Kind code of ref document: A |
|
WWP | Wipo information: published in national office |
Ref document number: 1020027005041 Country of ref document: KR |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1020027005037 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2000971566 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2000971566 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 10405/01 Country of ref document: AU |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1020027005041 Country of ref document: KR |