WO2005017216A2 - Recycling process for sludges and dusts from blast furnace and steel works - Google Patents
Recycling process for sludges and dusts from blast furnace and steel works Download PDFInfo
- Publication number
- WO2005017216A2 WO2005017216A2 PCT/BR2004/000152 BR2004000152W WO2005017216A2 WO 2005017216 A2 WO2005017216 A2 WO 2005017216A2 BR 2004000152 W BR2004000152 W BR 2004000152W WO 2005017216 A2 WO2005017216 A2 WO 2005017216A2
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- WO
- WIPO (PCT)
- Prior art keywords
- recycling process
- process according
- hydro
- processed
- pulp
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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
- 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
- C22B7/02—Working-up flue dust
-
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
-
- 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
Definitions
- the present invention refers to a recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes through the combination of the process steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration, hydro-cycloning, magnetic separation, flotation and drying, for the recovery of carbon, that can be in the form of coke, mineral coal or charcoal, and metallic iron (Fe), iron oxides (Fe x O y ), silica (Si0 2 ), calcium oxide (CaO) and zinc oxide (ZnO).
- Blast furnace sludge, fines and coarse steel works sludge, in the presently available state-of-art production techniques of pig iron and steel, is deposited in landfills, resulting in a great environmental impact due to the decrease of the available oxygen in the soil, directly affecting the biota existing in that environment and so hindering the proliferation of the essential organisms for the continuation of the life cycle.
- This dust or sludge presently considered to be industrial waste, has a tangible storage and handling cost and an enormous intangible value as a substitution for "scrap", when used in the production of steel.
- the present invention results in an considerable advantage to the recuperation of the degraded environment.
- the present invention describes a recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes, the process having the steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration in spiral concentrators, hydro-cycloning, magnetic separation, flotation and drying.
- Figure 1 a general diagram of the different process steps
- Figure 2 an elevated schematic view of the processing plant corresponding to the general diagram shown in figure 1 , with three primary spiral separator levels where the more dense materials are separated from the lighter ones
- Figure 3 a general diagram of the operational system, exemplifying the processing of the sludge of two blast furnaces.
- the present recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes consists of the process steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration, hydro-cycloning, magnetic separation, flotation and drying.
- the sludge is collected in the terminals of vacuum filters 1 , and/or at terminal of thickeners 2, or by dredging the floor of decanting pools 3 or the backfills of the steel works or recycling plant 4, from which it is fed into the recycling plant via land transport 5 or by pumping 6.
- the sludge When feeding via land transport, the sludge is transferred into a silo through a feeding screw 7 or a vibrating feeder or a conveyor belt 8. This equipment is below-floor level in order to facilitate the outlet of the material that feeds a mechanical agitation tank.
- a ultrasound step 9 associated to the mechanical agitation facilitates the dissociation and cleaning of the particles.
- the ultrasound treatment is intended to disassociate the iron concretions, since metallic iron has a high level of reactivity when coming from the ladle. The separation of the metallic iron from the lime, silica, and iron oxides during the gravimetric concentration step will be facilitated. With the addition of water 10 an homogeneous pulp is created.
- the pulp with a percentage of solids which lies between 15% to 35 %, is poured over a vibratory screen 11 with a supplementary addition of water 12 to remove agglomerated parts or foreign materials with a size greater than 2 mm, but, preferentially greater than 1 mm.
- the pulp is pumped 14 to a conditioning tank provided with mechanical agitation 13, which may contain additives to neutralize pH, hydrophobic or hydrophilic properties, or other properties that may hinder the recycling process.
- the pulp is prepared to undergo an optimized separation in the gravimetric concentration process step. Once duly conditioned, the sludge is fed to the series of primary spiral concentrators in three levels 15, one set up over the other and having a supplementary conditioning tank at each level.
- the denser minerals are concentrated (iron oxides and other iron components) and separated from the other, lighter components (silica, lime, carbon and zinc oxides), progressively, in each of these levels.
- the lighter pulp, before passing though each level is newly conditioned with more additives and by mechanical agitation.
- the denser minerals (iron oxides, and other metallic iron components), which form the concentrate C are pumped, through a third pump 16 to at least two series of hydro-cyclones 17, so as to increase the percentage of solids, the remainder (“under flow") falls into a rotating dryer 18.
- the middling M are then pumped through a fourth pump 19 to a second series with two levels of secondary spiral concentrators 20, one constructed over the other.
- the denser minerals are concentrated (iron oxides and other iron components) and separated from the other, lighter components (silica, lime, carbon and zinc oxides), progressively, in each of these levels.
- the lighter pulp, before passing through each level is possibly newly conditioned with a new addition of additives and by mechanical agitation.
- the middling M resulting from the secondary spiral concentrators is recycled in the same spiral series.
- the light middling M that results from the primary 15 and secondary 20 spiral concentrators, containing silica, lime, and coke or charcoal are taken through a fifth pump 21 to a third series with two levels of tertiary spiral concentrators 22, one over the other, projected especially for the separation of minerals with lower density and those with small granulometry, allowing for the separation, due to the density of silica mineral and lime, from the carbon minerals.
- a sixth pump 23 takes the denser sludge containing silica and lime to the hydro-cyclone series 24.
- the hydro-cyclone "under flow” C 3 is collected in a silo or skip 25, especially a skip of the Brook type.
- the hydro-cyclone "over flow” C 4 is taken via a seventh pump 26 to the thickener 2.
- the less dense pulp, containing coke or charcoal, is taken through an eight pump 27 to a series of hydro-cyclones 28.
- the "over flow” of the hydro-cyclone series, containing coke or charcoal having a higher zinc content, is taken through a ninth pump 29 to a second series of hydro-cyclones 30,
- the "over flow” of the hydro-cyclone series having coke or charcoal with a high level of zinc, is pressed in a filter press 31 , creating a pressed cake with coke or charcoal with a high level of zinc T-i.
- the "under flows” of the hydro-cyclone series 28 and 30 are pumped through the tenth pump 32 to a magnetic separator 33, which can be an electromagnetic separator or a wet rare earth magnetic separator with adjustable magnetic intensity, that aims removing iron oxides residue or other iron-containing components.
- the magnetic separator performs so the separation of the magnetic mineral (iron oxide) from the non-magnetic mineral (coke or charcoal).
- the non-magnetic fraction, rich in coke or charcoal and free from iron oxides is directed to a flotation cell 34 with the addition of foaming agents and additives that allows the coke or charcoal to float and the silica (SiO 2 ), lime (CaCOs), and zinc oxides to decant.
- the floated material, a final coke or charcoal concentrate is taken to a filter press or vacuum rotatory filter 35 to create a pressed coke or charcoal cake with low zinc levels T 2 .
- the recycled products obtained from the process of the present invention may be reused economically in the steel making industry besides contributing to the preservation of the environment.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention concerns to a recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes through the combination of the process steps of ore pulp formation (10), ultrasound treatment (9), conditioning (13), gravimetric concentration (15, 20, 22), hydro-cycloning (28, 30), magnetic separation (33), flotation (34) and drying (18) for the recovery of carbon, that can be in the form of coke, mineral coal or charcoal, and metallic iron (Fe), iron oxides (FexOy), silica (SiO2), calcium oxide (CaO) and zinc oxide (ZnO).
Description
Title: "RECYCLING PROCESS FOR BLAST FURNACE SLUDGE OR STEEL WORKS FINE SLUDGE" The present invention refers to a recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes through the combination of the process steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration, hydro-cycloning, magnetic separation, flotation and drying, for the recovery of carbon, that can be in the form of coke, mineral coal or charcoal, and metallic iron (Fe), iron oxides (FexOy), silica (Si02), calcium oxide (CaO) and zinc oxide (ZnO).
Description of the state-of-the-art During the manufacturing process of pig iron, ore fines, carbon fines (coke, mineral coal or charcoal), calcium oxide fines and silica fines are produced. During the manufacturing process of steel, especially in the step of oxygen injection through a lance, which occurs in the LD converter, the carbon of the metallic bath reacts with the oxygen generating a great quantity of carbon monoxide, resulting in a considerable elevation of the temperature. The oxygen injection result, also, in the projection of the liquid iron into the oxidizing atmosphere of the converter, solidifying there into small spheres. These small spheres of metallic iron and iron oxide and the fines in the above mentioned production processes are collected by special filters. These filters are regularly cleaned. When the cleaning is performed with the use of water, a sludge is formed. These steel works wastes cause a high degree of environmental degradation, since the same, when reaching the soil and the groundwater level, will remove oxygen, causing immeasurable harm.
Blast furnace sludge, fines and coarse steel works sludge, in the presently available state-of-art production techniques of pig iron and steel, is deposited in landfills, resulting in a great environmental impact due to the decrease of the available oxygen in the soil, directly affecting the biota existing
in that environment and so hindering the proliferation of the essential organisms for the continuation of the life cycle.
This dust or sludge, presently considered to be industrial waste, has a tangible storage and handling cost and an enormous intangible value as a substitution for "scrap", when used in the production of steel. The present invention results in an considerable advantage to the recuperation of the degraded environment.
Brief description of the invention The present invention describes a recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes, the process having the steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration in spiral concentrators, hydro-cycloning, magnetic separation, flotation and drying.
Description of the drawings The process, which is object of the present invention, allows the recycling of steel works sludge or dust in a feasible, efficient, and economical way, which can be better understood upon referral to the annexed figures.
The figures together with the description allow for a complete comprehension of the process. The figures show:
Figure 1 - a general diagram of the different process steps; Figure 2 - an elevated schematic view of the processing plant corresponding to the general diagram shown in figure 1 , with three primary spiral separator levels where the more dense materials are separated from the lighter ones; and Figure 3 - a general diagram of the operational system, exemplifying the processing of the sludge of two blast furnaces.
Detailed description of the invention According to these figures and their numeric references, the present recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes consists of the process steps of pulp formation, ultrasound treatment, conditioning, gravimetric concentration, hydro-cycloning, magnetic separation, flotation and drying. The sludge is collected in the terminals of vacuum filters 1 , and/or at terminal of thickeners 2, or by dredging the floor of decanting pools 3 or the backfills of the steel works or recycling plant 4, from which it is fed into the recycling plant via land transport 5 or by pumping 6.
When feeding via land transport, the sludge is transferred into a silo through a feeding screw 7 or a vibrating feeder or a conveyor belt 8. This equipment is below-floor level in order to facilitate the outlet of the material that feeds a mechanical agitation tank. A ultrasound step 9 associated to the mechanical agitation facilitates the dissociation and cleaning of the particles. The ultrasound treatment is intended to disassociate the iron concretions, since metallic iron has a high level of reactivity when coming from the ladle. The separation of the metallic iron from the lime, silica, and iron oxides during the gravimetric concentration step will be facilitated. With the addition of water 10 an homogeneous pulp is created.
The pulp, with a percentage of solids which lies between 15% to 35 %, is poured over a vibratory screen 11 with a supplementary addition of water 12 to remove agglomerated parts or foreign materials with a size greater than 2 mm, but, preferentially greater than 1 mm. The pulp is pumped 14 to a conditioning tank provided with mechanical agitation 13, which may contain additives to neutralize pH, hydrophobic or hydrophilic properties, or other properties that may hinder the recycling process. After the conditioning, the pulp is prepared to undergo an optimized separation in the gravimetric concentration process step.
Once duly conditioned, the sludge is fed to the series of primary spiral concentrators in three levels 15, one set up over the other and having a supplementary conditioning tank at each level. It is in these spiral concentrators that the denser minerals are concentrated (iron oxides and other iron components) and separated from the other, lighter components (silica, lime, carbon and zinc oxides), progressively, in each of these levels. The lighter pulp, before passing though each level is newly conditioned with more additives and by mechanical agitation. The denser minerals (iron oxides, and other metallic iron components), which form the concentrate C, are pumped, through a third pump 16 to at least two series of hydro-cyclones 17, so as to increase the percentage of solids, the remainder ("under flow") falls into a rotating dryer 18. The middling M are then pumped through a fourth pump 19 to a second series with two levels of secondary spiral concentrators 20, one constructed over the other. It is in these spiral concentrators, that the denser minerals are concentrated (iron oxides and other iron components) and separated from the other, lighter components (silica, lime, carbon and zinc oxides), progressively, in each of these levels. The lighter pulp, before passing through each level is possibly newly conditioned with a new addition of additives and by mechanical agitation.
The middling M resulting from the secondary spiral concentrators is recycled in the same spiral series. The light middling M that results from the primary 15 and secondary 20 spiral concentrators, containing silica, lime, and coke or charcoal are taken through a fifth pump 21 to a third series with two levels of tertiary spiral concentrators 22, one over the other, projected especially for the separation of minerals with lower density and those with small granulometry, allowing for the separation, due to the density of silica mineral and lime, from the carbon minerals.
A sixth pump 23 takes the denser sludge containing silica and lime to the hydro-cyclone series 24. The hydro-cyclone "under flow" C3 is collected in a silo or skip 25, especially a skip of the Brook type. The hydro-cyclone "over flow" C4 is taken via a seventh pump 26 to the thickener 2.
The less dense pulp, containing coke or charcoal, is taken through an eight pump 27 to a series of hydro-cyclones 28.
The "over flow" of the hydro-cyclone series, containing coke or charcoal having a higher zinc content, is taken through a ninth pump 29 to a second series of hydro-cyclones 30, The "over flow" of the hydro-cyclone series having coke or charcoal with a high level of zinc, is pressed in a filter press 31 , creating a pressed cake with coke or charcoal with a high level of zinc T-i. The "under flows" of the hydro-cyclone series 28 and 30 are pumped through the tenth pump 32 to a magnetic separator 33, which can be an electromagnetic separator or a wet rare earth magnetic separator with adjustable magnetic intensity, that aims removing iron oxides residue or other iron-containing components. The magnetic separator performs so the separation of the magnetic mineral (iron oxide) from the non-magnetic mineral (coke or charcoal).
The non-magnetic fraction, rich in coke or charcoal and free from iron oxides is directed to a flotation cell 34 with the addition of foaming agents and additives that allows the coke or charcoal to float and the silica (SiO2), lime (CaCOs), and zinc oxides to decant. The floated material, a final coke or charcoal concentrate, is taken to a filter press or vacuum rotatory filter 35 to create a pressed coke or charcoal cake with low zinc levels T2. The recycled products obtained from the process of the present invention may be reused economically in the steel making industry besides contributing to the preservation of the environment.
Having been described an example of a preferred embodiment, it should be understood that the scope of the present invention encompasses other possible variations, being limited only by the claims, thereby including equivalent configurations.
Claims
CLAIMS 1. Recycling process for blast furnace sludge, or powder from dry dust catcher, or steel works fine and coarse sludge, or industrial or metallurgical wastes, the process being characterized by the combination of the process steps of: - pulp formation (10), - ultrasound treatment (9), - conditioning (13), - gravimetric concentration in spiral concentrators (15, 20, 22), - hydro-cycloning (17, 24, 28, 30), - magnetic separation (33), - flotation (34), and - drying (18).
2. Recycling process according to claim 1 , characterized by the pulp formation, being realized with the addition of water (10) up to a solid content between 15% to 35 %.
3. Recycling process according to claim 1 , characterized by the fact that between the steps of ultrasound treatment (9) and conditioning (13) the pulp is screened (11 ) with a supplementary addition of water (12).
4. Recycling process according to claim 3, characterized by the fact that in the screening step (11 ) agglomerated parts and foreign materials with a size greater than 2 mm, bub preferentially greater than 1 mm, are removed.
5. Recycling process according to claim 1 , characterized by the conditioning step, (13) being realized under mechanical stirring and mixing of additives with the pulp.
6. Recycling process according to claim 5, characterized by the additives neutralizing the pH, hydrophobic or hydrophilic properties, or other properties of the pulp that may hinder the recycling process.
7. Recycling process according to claim 1 , characterized by the gravimetric concentration step in spiral concentrators, (15) being realized initially in three levels.
8. Recycling process according to claim 7, characterized by the fact that between each initial concentration step (15) a supplementary conditioning is performed.
9. Recycling process according to anyone of the claims 1 to 8, characterized by a concentrate (C) and a middling (M), being produced after the primary concentration step (15).
10. Recycling process according to claim 9, characterized by the middling (M) of the primary concentration (15), being processed in a second series with two levels of secondary spiral concentrators (20).
11. Recycling process according to claim 9 or 10, characterized by the middling (M) produced in the primary concentration (15) and in the secondary concentration (20), being processed in a third series with two levels of tertiary spiral concentrators (22).
12. Recycling process according to claim 1 , characterized by the concentrate (C), being processed in a hydro-cyclone (17) to increase the solids percentage.
13. Recycling process according to anyone of the claims 1 , 10 or 11 , characterized by the sludge containing silica and lime from the gravimetric concentration steps (15, 20, 22), being processed in a hydro-cyclone (24).
14. Recycling process according to claim 1 , characterized by the less dense pulp containing coke and charcoal, being processed in a hydro-cyclone series (28, 30).
15. Recycling process according to claim 1 or 14, characterized by the under flow of the hydro-cyclone series (28, 30), processed in a magnetic separator (33).
16. Recycling process according to claim 15, characterized by the magnetic separator (33), being an electromagnetic separator or a wet rare earth magnetic separator with adjustable magnetic intensity.
17. Recycling process according to claim 1 or 16, characterized by the non-magnetic mineral after the magnetic separation (33), being processed in a flotation cell (34).
18. Recycling process according to claim 17, characterized by the fact that in the flotation cell (34) foaming agents and additives are added to allow a decantation of silica (SiO2), lime (CaCo3) and zinc oxides.
19. Recycling process according to claim 17, characterized by the floated material being taken from the flotation cell (34) to a filter press or rotatory filter (35).
20. Recycling process according to claim 1 , characterized by the concentrate after the hydro-cyclones (17), being dried in rotating dryer (18).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR0302809-7A BR0302809A (en) | 2003-08-14 | 2003-08-14 | Recycling process of blast furnace sludge or steelmaking sludge and industrial or metallurgical tailings by combining the following processes: conditioning, gravimetric concentration, cycloning, magnetic separation and flotation |
| BRPI0302809-7 | 2003-08-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005017216A2 true WO2005017216A2 (en) | 2005-02-24 |
| WO2005017216A3 WO2005017216A3 (en) | 2005-03-24 |
Family
ID=34140322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2004/000152 Ceased WO2005017216A2 (en) | 2003-08-14 | 2004-08-13 | Recycling process for sludges and dusts from blast furnace and steel works |
Country Status (2)
| Country | Link |
|---|---|
| BR (1) | BR0302809A (en) |
| WO (1) | WO2005017216A2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321078C (en) * | 2005-09-14 | 2007-06-13 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| WO2010146596A1 (en) * | 2009-06-16 | 2010-12-23 | Tata Steel Limited | A process for producing high grade blast furnace feed from poor grade iron ore ultra fines |
| CN102069036A (en) * | 2010-11-12 | 2011-05-25 | 山东乾舜矿冶科技股份有限公司 | Method for recycling waste magnesia carbon brick |
| CN102747228A (en) * | 2012-07-18 | 2012-10-24 | 云南昆欧科技有限责任公司 | Method for recycling valuable elements from blast furnace gas mud |
| WO2012093280A3 (en) * | 2011-01-04 | 2012-11-15 | Gomes Guilherme Santana Lopes | Systems and methods for recycling steelmaking converter exhaust residue and products made thereby |
| CN103551244A (en) * | 2013-11-21 | 2014-02-05 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
| CN116441059A (en) * | 2023-03-24 | 2023-07-18 | 浙江大学 | A fly ash flotation method coupled with ultrasonic emulsification and ultrasonic enhanced adsorption decarbonization |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0901149A2 (en) * | 2009-01-09 | 2010-11-16 | Minesteel Ltda | process of implementation and improvement of the pellet feed by the use of steel mill fines |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5282616A (en) * | 1975-12-30 | 1977-07-11 | Nippon Steel Corp | Treatment of iron-containing powdery material |
| FR2416269A1 (en) * | 1978-01-31 | 1979-08-31 | Anvar | PROCESS FOR RECOVERING THE LEAD AND ZINC CONTAINED IN THE SECONDARY PURIFICATION SLUDGE OF TOP-FURNACE GASES |
| DE3109448A1 (en) * | 1981-03-12 | 1982-11-04 | Klöckner-Humboldt-Deutz AG, 5000 Köln | METHOD AND SYSTEM FOR OBTAINING PLASTIC-FREE LEAD PRODUCTS FROM OLD ACCUMULATORS |
| US4416768A (en) * | 1982-04-02 | 1983-11-22 | Quebec Cartier Mining Company | Ore beneficiation |
| US4696353A (en) * | 1986-05-16 | 1987-09-29 | W. S. Tyler, Incorporated | Drilling mud cleaning system |
-
2003
- 2003-08-14 BR BR0302809-7A patent/BR0302809A/en not_active Application Discontinuation
-
2004
- 2004-08-13 WO PCT/BR2004/000152 patent/WO2005017216A2/en not_active Ceased
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321078C (en) * | 2005-09-14 | 2007-06-13 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| WO2010146596A1 (en) * | 2009-06-16 | 2010-12-23 | Tata Steel Limited | A process for producing high grade blast furnace feed from poor grade iron ore ultra fines |
| AU2009311053B2 (en) * | 2009-06-16 | 2015-05-21 | Tata Steel Limited | A process for producing high grade blast furnace feed from poor grade iron ore ultra fines |
| CN102069036A (en) * | 2010-11-12 | 2011-05-25 | 山东乾舜矿冶科技股份有限公司 | Method for recycling waste magnesia carbon brick |
| JP2014508853A (en) * | 2011-01-04 | 2014-04-10 | サンタナ ロペス ゴメス，ギリェルメ | System and method for reclaiming steelmaking converter exhaust residue and product produced thereby |
| US8540798B2 (en) | 2011-01-04 | 2013-09-24 | Guilherme Santana Lopes Gomes | Systems and methods for recycling steelmaking converter sludge |
| CN103328659A (en) * | 2011-01-04 | 2013-09-25 | 吉列尔梅·桑塔纳·洛佩斯·戈梅斯 | System and method for recycling steelmaking converter slag and products made therefrom |
| WO2012093280A3 (en) * | 2011-01-04 | 2012-11-15 | Gomes Guilherme Santana Lopes | Systems and methods for recycling steelmaking converter exhaust residue and products made thereby |
| CN103328659B (en) * | 2011-01-04 | 2016-08-17 | 吉列尔梅·桑塔纳·洛佩斯·戈梅斯 | System and method for recycling steelmaking converter slag and products made therefrom |
| US9493853B2 (en) | 2011-01-04 | 2016-11-15 | Guilherme Santana Lopes Gomes | Cleaning tool for cleaning particles contained in a slurry |
| RU2605409C2 (en) * | 2011-01-04 | 2016-12-20 | Гилерме Сантана Лопес ГОМЕС | Systems and methods for recycling steelmaking converter exhaust residue and products made thereby |
| EP3640351A1 (en) * | 2011-01-04 | 2020-04-22 | Hephaestus Metals Projetos e Equipamentos Ltda. | Systems and methods for recycling steelmaking converter exhaust residue and products made thereby |
| CN102747228A (en) * | 2012-07-18 | 2012-10-24 | 云南昆欧科技有限责任公司 | Method for recycling valuable elements from blast furnace gas mud |
| CN103551244A (en) * | 2013-11-21 | 2014-02-05 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
| CN116441059A (en) * | 2023-03-24 | 2023-07-18 | 浙江大学 | A fly ash flotation method coupled with ultrasonic emulsification and ultrasonic enhanced adsorption decarbonization |
| CN116441059B (en) * | 2023-03-24 | 2024-02-09 | 浙江大学 | Fly ash flotation method for coupling ultrasonic emulsification and ultrasonic intensified adsorption decarburization |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005017216A3 (en) | 2005-03-24 |
| BR0302809A (en) | 2005-03-29 |
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