CA2954697A1 - Method and device for processing iron silicate rock - Google Patents
Method and device for processing iron silicate rock Download PDFInfo
- Publication number
- CA2954697A1 CA2954697A1 CA2954697A CA2954697A CA2954697A1 CA 2954697 A1 CA2954697 A1 CA 2954697A1 CA 2954697 A CA2954697 A CA 2954697A CA 2954697 A CA2954697 A CA 2954697A CA 2954697 A1 CA2954697 A1 CA 2954697A1
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- CA
- Canada
- Prior art keywords
- iron
- silicate rock
- iron silicate
- slag
- rock
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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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
- C22B1/005—Preliminary treatment of scrap
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/567—Manufacture of steel by other methods operating in a continuous way
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
-
- 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
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- 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
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- 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)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Processing Of Solid Wastes (AREA)
- Revetment (AREA)
Abstract
The method is used to process iron silicate rock. At least one component is at least partially removed from the iron silicate rock. At least one component that is different from iron is thus removed from the iron silicate rock. The processed iron silicate rock is used for the production of pig iron or steel. The device for utilizing the processed silicate rock is designed as a device for producing pig iron or steel.
Description
----- --------- ------ ----------------Method and device for processing iron silicate rock The invention relates to a process for treating iron silicate rock in which at least one constituent is at least partly removed from the iron silicate rock.
The invention also relates to an apparatus for processing treated iron silicate rock.
Iron silicate rock is at present virtually exclusively mechanically utilized.
The iron silicate rock is formed as slag in the smelting of copper ores.
The iron silicate rock is at present poured, for example, into molds and the moldings obtained are used for water frontage stabilization. Granulation of the iron silicate rock is likewise already known. Coarse granulated material is used, for example, as gravel for railroad embankments. Finer granulated material is used in sandblasting.
In terms of its proportions by weight, iron silicate rock consists essentially of iron, silicon and oxygen. Apart from the iron content, the iron silicate rock also contains secondary elements, for example copper, lead, arsenic, nickel and/or zinc.
In the smelting of copper ores (predominantly chalcopyrite), large amounts of slag are formed. Based on the amount of starting material containing metal of value, the copper industry produces 600 kg of slag/t of ore concentrate, which is about three times the amount of slag compared to the iron and steel industry.
The invention also relates to an apparatus for processing treated iron silicate rock.
Iron silicate rock is at present virtually exclusively mechanically utilized.
The iron silicate rock is formed as slag in the smelting of copper ores.
The iron silicate rock is at present poured, for example, into molds and the moldings obtained are used for water frontage stabilization. Granulation of the iron silicate rock is likewise already known. Coarse granulated material is used, for example, as gravel for railroad embankments. Finer granulated material is used in sandblasting.
In terms of its proportions by weight, iron silicate rock consists essentially of iron, silicon and oxygen. Apart from the iron content, the iron silicate rock also contains secondary elements, for example copper, lead, arsenic, nickel and/or zinc.
In the smelting of copper ores (predominantly chalcopyrite), large amounts of slag are formed. Based on the amount of starting material containing metal of value, the copper industry produces 600 kg of slag/t of ore concentrate, which is about three times the amount of slag compared to the iron and steel industry.
2 Slag purification is already carried out worldwide with the main goal of increasing/maximizing the copper yield. There are ultimately two process approaches:
a) Pyrometallurgical ¨ in an electric furnace or in an oil-/gas-fired Teniente furnace. Here, the molten slag is treated by phase gravimetric separation of the slag/copper matte mixture. A covering of coke (reducing agent) has the main task of avoiding contact of the melt with oxygen.
b) Hydrometallurgical ¨ slag flotation. After solidification of the slag, a milling process is carried out, followed by flotation of the suffidic copper particles. A concentrate is formed and this can be recirculated to the primary process.
The residual copper contents in these processes are about 0.4-0.8% and both processes are not designed for the metallurgical removal of further impurities. The slag product formed (regardless of whether from a pyrometallurgical or hydrometallurgical process) has a problem: there is virtually no economical use and the available uses have little added value.
The greatest part of the copper slag produced worldwide (about 15 million t/a) is therefore dumped.
It is an object of the present invention to improve a process of the type mentioned at the outset in such a way that improved economics are provided.
This object is achieved according to the invention by at least one constituent other than iron being at least partly removed and by the treated iron silicate rock being used for the production of steel or pig iron.
A further object of the present invention is to construct an apparatus of the type mentioned at the outset in such a way that improved economics are achieved.
a) Pyrometallurgical ¨ in an electric furnace or in an oil-/gas-fired Teniente furnace. Here, the molten slag is treated by phase gravimetric separation of the slag/copper matte mixture. A covering of coke (reducing agent) has the main task of avoiding contact of the melt with oxygen.
b) Hydrometallurgical ¨ slag flotation. After solidification of the slag, a milling process is carried out, followed by flotation of the suffidic copper particles. A concentrate is formed and this can be recirculated to the primary process.
The residual copper contents in these processes are about 0.4-0.8% and both processes are not designed for the metallurgical removal of further impurities. The slag product formed (regardless of whether from a pyrometallurgical or hydrometallurgical process) has a problem: there is virtually no economical use and the available uses have little added value.
The greatest part of the copper slag produced worldwide (about 15 million t/a) is therefore dumped.
It is an object of the present invention to improve a process of the type mentioned at the outset in such a way that improved economics are provided.
This object is achieved according to the invention by at least one constituent other than iron being at least partly removed and by the treated iron silicate rock being used for the production of steel or pig iron.
A further object of the present invention is to construct an apparatus of the type mentioned at the outset in such a way that improved economics are achieved.
3 PCT/DE2015/000314 This object is achieved according to the invention by the apparatus being configured as a facility for producing pig iron or steel.
The metal content of copper slags has hitherto not been utilized (neither the nonferrous metals nor the iron content). At an amount of slag of 700 kt/a, this corresponds to an iron content of 280 kt/a. The slag is already liquid and comparatively little additional energy therefore has to be employed in order to carry out the process. The present invention is therefore based on the approach of removing the nonferrous metals from the slag product and using the remaining slag product (contains slag formers Si, Ca, Mg, Al and Fe as oxides) and raw material for producing pig iron or steel.
This downstream process allows the preceding process steps more flexibility in the processing of the copper raw materials. The complexity of these raw materials in respect of their composition will increase further in future, due to the available copper ore deposits becoming poorer. Apart from impurities of economic interest (processing smelters receive a reimbursement from the mines for the processing of concentrates having increased contents), e.g. As, Pb, in the steel industry other important parameters are especially, for example, Zn and steel contaminants such as S and P. In addition, the copper yield is naturally critical. The newly developed process of the invention covers these challenges and pursues the objective of "zero-waste metallurgy", i.e. all products formed in the production process are processed further.
A key-point-type description of the essential process steps for carrying out the treatment according to the invention of iron silicate rock is given below.
Process description Starting materials:
The metal content of copper slags has hitherto not been utilized (neither the nonferrous metals nor the iron content). At an amount of slag of 700 kt/a, this corresponds to an iron content of 280 kt/a. The slag is already liquid and comparatively little additional energy therefore has to be employed in order to carry out the process. The present invention is therefore based on the approach of removing the nonferrous metals from the slag product and using the remaining slag product (contains slag formers Si, Ca, Mg, Al and Fe as oxides) and raw material for producing pig iron or steel.
This downstream process allows the preceding process steps more flexibility in the processing of the copper raw materials. The complexity of these raw materials in respect of their composition will increase further in future, due to the available copper ore deposits becoming poorer. Apart from impurities of economic interest (processing smelters receive a reimbursement from the mines for the processing of concentrates having increased contents), e.g. As, Pb, in the steel industry other important parameters are especially, for example, Zn and steel contaminants such as S and P. In addition, the copper yield is naturally critical. The newly developed process of the invention covers these challenges and pursues the objective of "zero-waste metallurgy", i.e. all products formed in the production process are processed further.
A key-point-type description of the essential process steps for carrying out the treatment according to the invention of iron silicate rock is given below.
Process description Starting materials:
4 = Iron silicate rock, fayalite ¨ (Cu slag from primary copper production) I Reducing agent (solid ¨ coke, coal; gaseous ¨ CO, H2, Fe) = Collector metals (Cu, Fe) = Electric energy = Natural gas or natural gas decomposition products = Air/oxygen = Circulation products from the copper and steel industry (i.e.
dross, litharges, fly dusts, speise, metal phases) or slags Process temperature:
= 1300-1600 C (optimal process temperature hitherto 1400 C) Plant:
= Electric furnace (rectangular, treatment zone, calming zone, tapping points configured as overflow, input via channel system, gas introduction by means of bottom flushing) = Closed AOD converter with bottom flushing Process operation:
= Discontinuous = Continuous (preferred, but whether it is actually implementable depends on ongoing studies) = Multistage ¨ necessary!
Energy introduction:
= Electric furnace 9 electric (very low oxygen potentials can be set) = AOD converter 9 gas-fired (substoichiometric combustion necessary (0 < 1; preferably 0.8-0.9; disadvantage ¨ oxygen potential is increased compared to an electric furnace) Residence time:
= . Not yet finally determined; about 2-6 h Products:
= Slag product(s) ¨ fayalite product, magnetite product = Fly dust = Metal alloy Illustrative embodiments of the invention are schematically depicted in the drawings. The drawings show:
Fig. 1: a schematic flow diagram of the process, Fig. 2: a table showing the specification of the starting material, Fig. 3: a table showing the specification for the slag product from the process.
Fig. 1 shows a schematic depiction for carrying out the individual process steps. In particular, the process sequence in the deep reduction of iron silicate rock to give a fayalite or magnetite product as raw material for use in the iron and steel industry is depicted.
The slag from the primary copper process is preferably introduced in liquid form into the deep reduction process. The liquid slag preferably has a temperature in the range from 1200 C to 1350 C. A temperature value of about 1260 C is typical.
As an alternative, working up slag heaps by the process of the invention is also envisaged. However, compared to processing of liquid slag, this involves a higher energy consumption since melting of the solid material is firstly required. A typical analysis of the starting material is shown in the table in Fig. 2.
The objective of the process is to separate the more noble metals of value present from the iron by selective reduction. The iron remains, bound to silicon and/or to oxygen as fayalite product (Fe2SiO4) or magnetite product (Fe304), for further use as starting material in the iron and steel industry.
This product contains further oxides of Ca, Mg or Cr as impurities. The specification for the product is shown in the table in Fig. 3.
During heating to the preferred process temperature of 1400 C, the residual sulfur present has to be removed from the system by introduction of oxygen in order for the subsequent reduction period to be able to be carried out efficiently. The melt bath is covered and protected from further contact with oxygen by addition of not more than 7% of solid carbon, based on the amount of slag. The CO/CO2 ratio of the process atmosphere should be set so that an oxygen potential of 10-12 atm is not exceeded. In this phase, the volatile constituents of the slag vaporize and leave the process together with the offgas. In the course of the offgas treatment, these constituents are obtained in the form of their oxides as fly dust. The fly dust obtained has a composition of about 40-60% of Zn, 10-20% of Pb and <10% of As and can be used as raw material for zinc production, e.g. in the rolling process. In the example shown here with an annual tonnage of 700 000 t, an amount of fly dust of about 20 000 t is to be expected.
The copper content after this process step is still about 0.2-0.3% of Cu. To separate copper and iron selectively, carbon monoxide is introduced as reducing agent via flushing bricks arranged at the bottom. The advantage of bottom flushing is the significantly lower gas velocity required compared to flushing by means of a lance. This leads to intensive mixing between slag, metal and gas phase. The reduction takes place at the gas/slag phase interface according to the reaction equation Cu20 + CO ¨> 2Cu +
CO2. The metal droplets formed are very fine (max. 20 pm) and have to be separated from the slag phase by density separation in a calming zone.
Depending on the further processing route, the mineralogy of the slag product can be matched to the respective use. If the product is, for example, to be used directly in a blast furnace, the fayalite phase obtained is satisfactory. For introduction via the blast furnace charger, pretreatment in the sintering plant is necessary. The melting range of fayalite (about 1180 ) is too low for this and would lead to problems in processing. It is therefore necessary to set the magnetite content in the finished product.
This ratio can be adjusted according to the requirements of the customer by addition of a defined amount of oxygen. The oxygen can be added not only in the form of oxygen gas but also in the form of intermediates which serve as oxygen donors, e.g. Fe203 dust from the steel industry.
dross, litharges, fly dusts, speise, metal phases) or slags Process temperature:
= 1300-1600 C (optimal process temperature hitherto 1400 C) Plant:
= Electric furnace (rectangular, treatment zone, calming zone, tapping points configured as overflow, input via channel system, gas introduction by means of bottom flushing) = Closed AOD converter with bottom flushing Process operation:
= Discontinuous = Continuous (preferred, but whether it is actually implementable depends on ongoing studies) = Multistage ¨ necessary!
Energy introduction:
= Electric furnace 9 electric (very low oxygen potentials can be set) = AOD converter 9 gas-fired (substoichiometric combustion necessary (0 < 1; preferably 0.8-0.9; disadvantage ¨ oxygen potential is increased compared to an electric furnace) Residence time:
= . Not yet finally determined; about 2-6 h Products:
= Slag product(s) ¨ fayalite product, magnetite product = Fly dust = Metal alloy Illustrative embodiments of the invention are schematically depicted in the drawings. The drawings show:
Fig. 1: a schematic flow diagram of the process, Fig. 2: a table showing the specification of the starting material, Fig. 3: a table showing the specification for the slag product from the process.
Fig. 1 shows a schematic depiction for carrying out the individual process steps. In particular, the process sequence in the deep reduction of iron silicate rock to give a fayalite or magnetite product as raw material for use in the iron and steel industry is depicted.
The slag from the primary copper process is preferably introduced in liquid form into the deep reduction process. The liquid slag preferably has a temperature in the range from 1200 C to 1350 C. A temperature value of about 1260 C is typical.
As an alternative, working up slag heaps by the process of the invention is also envisaged. However, compared to processing of liquid slag, this involves a higher energy consumption since melting of the solid material is firstly required. A typical analysis of the starting material is shown in the table in Fig. 2.
The objective of the process is to separate the more noble metals of value present from the iron by selective reduction. The iron remains, bound to silicon and/or to oxygen as fayalite product (Fe2SiO4) or magnetite product (Fe304), for further use as starting material in the iron and steel industry.
This product contains further oxides of Ca, Mg or Cr as impurities. The specification for the product is shown in the table in Fig. 3.
During heating to the preferred process temperature of 1400 C, the residual sulfur present has to be removed from the system by introduction of oxygen in order for the subsequent reduction period to be able to be carried out efficiently. The melt bath is covered and protected from further contact with oxygen by addition of not more than 7% of solid carbon, based on the amount of slag. The CO/CO2 ratio of the process atmosphere should be set so that an oxygen potential of 10-12 atm is not exceeded. In this phase, the volatile constituents of the slag vaporize and leave the process together with the offgas. In the course of the offgas treatment, these constituents are obtained in the form of their oxides as fly dust. The fly dust obtained has a composition of about 40-60% of Zn, 10-20% of Pb and <10% of As and can be used as raw material for zinc production, e.g. in the rolling process. In the example shown here with an annual tonnage of 700 000 t, an amount of fly dust of about 20 000 t is to be expected.
The copper content after this process step is still about 0.2-0.3% of Cu. To separate copper and iron selectively, carbon monoxide is introduced as reducing agent via flushing bricks arranged at the bottom. The advantage of bottom flushing is the significantly lower gas velocity required compared to flushing by means of a lance. This leads to intensive mixing between slag, metal and gas phase. The reduction takes place at the gas/slag phase interface according to the reaction equation Cu20 + CO ¨> 2Cu +
CO2. The metal droplets formed are very fine (max. 20 pm) and have to be separated from the slag phase by density separation in a calming zone.
Depending on the further processing route, the mineralogy of the slag product can be matched to the respective use. If the product is, for example, to be used directly in a blast furnace, the fayalite phase obtained is satisfactory. For introduction via the blast furnace charger, pretreatment in the sintering plant is necessary. The melting range of fayalite (about 1180 ) is too low for this and would lead to problems in processing. It is therefore necessary to set the magnetite content in the finished product.
This ratio can be adjusted according to the requirements of the customer by addition of a defined amount of oxygen. The oxygen can be added not only in the form of oxygen gas but also in the form of intermediates which serve as oxygen donors, e.g. Fe203 dust from the steel industry.
Claims (11)
1. A process for treating iron silicate rock, in which at least one constituent is at least partly removed from the iron silicate rock, characterized in that at least one constituent other than iron is at least partly removed and in that the treated iron silicate rock is used for producing pig iron or steel.
2. The process as claimed in claim 1, characterized in that the iron silicate rock is treated in a liquid state.
3. The process as claimed in claim 1 or 2, characterized in that the iron silicate rock is treated at a temperature of from about 1300°C to 1600°C.
4. The process as claimed in any of claims 1 to 3, characterized in that a reducing agent is introduced during the treatment.
5. The process as claimed in any of claims 1 to 4, characterized in that the treatment is carried out in a plurality of stages.
6. The process as claimed in any of claims 1 to 5, characterized in that oxygen is introduced for at least part of the time during the treatment.
7. The process as claimed in any of claims 1 to 6, characterized in that the treatment is carried out within an electric furnace with bottom flushing.
8. The process as claimed in any of claims 1 to 7, characterized in that a reducing agent is introduced during the treatment.
9. An apparatus for treating iron silicate rock, characterized in that the iron silicate rock is treated in a furnace which has a feed facility for a gas.
10. An apparatus for processing treated iron silicate rock, characterized in that the apparatus is configured as a facility for producing pig iron or steel.
11. The apparatus as claimed in claim 10, characterized in that it is configured as a blast furnace.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014010442.7 | 2014-07-11 | ||
| DE102014010442.7A DE102014010442A1 (en) | 2014-07-11 | 2014-07-11 | Method and device for processing iron silicate stone |
| PCT/DE2015/000314 WO2016004913A1 (en) | 2014-07-11 | 2015-06-18 | Method and device for processing iron silicate rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2954697A1 true CA2954697A1 (en) | 2016-01-14 |
Family
ID=53835842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2954697A Abandoned CA2954697A1 (en) | 2014-07-11 | 2015-06-18 | Method and device for processing iron silicate rock |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US20170183748A1 (en) |
| EP (1) | EP3167084A1 (en) |
| JP (1) | JP2017528594A (en) |
| KR (1) | KR20170047227A (en) |
| CN (1) | CN107075606A (en) |
| AU (1) | AU2015285988A1 (en) |
| CA (1) | CA2954697A1 (en) |
| CL (1) | CL2017000062A1 (en) |
| DE (1) | DE102014010442A1 (en) |
| EA (1) | EA201790172A1 (en) |
| PE (1) | PE20170513A1 (en) |
| PH (1) | PH12016502597A1 (en) |
| WO (1) | WO2016004913A1 (en) |
| ZA (1) | ZA201700109B (en) |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB652814A (en) * | 1947-05-02 | 1951-05-02 | Petri Baldur Bryk | Process for the production of iron and iron alloys |
| US2986458A (en) * | 1958-09-05 | 1961-05-30 | Strategic Materials Corp | Production of iron from ferrous slag materials |
| US3032411A (en) * | 1959-02-24 | 1962-05-01 | Strategic Materials Corp | Metallurgical process |
| US3361557A (en) * | 1965-03-22 | 1968-01-02 | R N Corp | Processes for direct reduction of ironbearing ores, slags and the like |
| US4036636A (en) * | 1975-12-22 | 1977-07-19 | Kennecott Copper Corporation | Pyrometallurgical process for smelting nickel and nickel-copper concentrates including slag treatment |
| AT403294B (en) * | 1994-10-10 | 1997-12-29 | Holderbank Financ Glarus | METHOD FOR PROCESSING WASTE OR METAL OXIDE-CONTAINING WASTE COMBUSTION RESIDUES AND DEVICE FOR CARRYING OUT THIS METHOD |
| AT405944B (en) * | 1996-04-19 | 1999-12-27 | Holderbank Financ Glarus | METHOD FOR REDUCING OXIDIC SLAGS |
| AT406474B (en) * | 1998-03-17 | 2000-05-25 | Holderbank Financ Glarus | METHOD FOR CONVERTING SLAG FROM NON-IRON METALLURGY |
| DE102006022779A1 (en) * | 2005-06-08 | 2006-12-21 | Sms Demag Ag | Method and apparatus for recovering a metal from a slag containing the metal |
| CA2632530A1 (en) * | 2005-12-09 | 2007-06-14 | Council Of Scientific And Industrial Research | A process for recovery of iron from copper slag |
| JP5180438B2 (en) * | 2006-01-18 | 2013-04-10 | 新日鐵住金株式会社 | Method for producing charcoal-containing pellets |
| EP2053137A1 (en) * | 2007-10-19 | 2009-04-29 | Paul Wurth S.A. | Recovery of waste containing copper and other valuable metals |
| JP5308711B2 (en) * | 2008-05-16 | 2013-10-09 | 新日鐵住金株式会社 | Granulation method for sintered raw materials for iron making |
| JP5326475B2 (en) * | 2008-10-07 | 2013-10-30 | 新日鐵住金株式会社 | Method for recovering chromium from chromium-containing slag |
| JP5049311B2 (en) * | 2009-03-31 | 2012-10-17 | パンパシフィック・カッパー株式会社 | Method and system for dry treatment of converter slag in copper smelting |
| JP2012067375A (en) * | 2010-09-27 | 2012-04-05 | Pan Pacific Copper Co Ltd | Dry processing method and system for converter slag in copper smelting |
| JP2012012707A (en) * | 2011-09-22 | 2012-01-19 | Pan Pacific Copper Co Ltd | Dry-type treating method and system for converter slag in copper refining |
| CN102851513A (en) * | 2012-09-14 | 2013-01-02 | 金川集团股份有限公司 | Method for recovering valuable metals from nickel-copper molten slag through selective reduction |
| CN102952952B (en) * | 2012-09-26 | 2014-08-20 | 东北大学 | Method for directly restoring and recovering copper iron from smelting copper slag |
| CN103060502B (en) * | 2013-01-14 | 2014-03-26 | 白银龙家丰金属渣综合利用有限公司 | Process for one-time reduction melting of ferric silicate by using waste copper residue |
-
2014
- 2014-07-11 DE DE102014010442.7A patent/DE102014010442A1/en not_active Withdrawn
-
2015
- 2015-06-18 CN CN201580037641.7A patent/CN107075606A/en active Pending
- 2015-06-18 EA EA201790172A patent/EA201790172A1/en unknown
- 2015-06-18 EP EP15749967.4A patent/EP3167084A1/en not_active Withdrawn
- 2015-06-18 AU AU2015285988A patent/AU2015285988A1/en not_active Abandoned
- 2015-06-18 CA CA2954697A patent/CA2954697A1/en not_active Abandoned
- 2015-06-18 PE PE2017000039A patent/PE20170513A1/en unknown
- 2015-06-18 JP JP2017501384A patent/JP2017528594A/en active Pending
- 2015-06-18 WO PCT/DE2015/000314 patent/WO2016004913A1/en active Application Filing
- 2015-06-18 US US15/325,281 patent/US20170183748A1/en not_active Abandoned
- 2015-06-18 KR KR1020177003683A patent/KR20170047227A/en unknown
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2016
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| US20170183748A1 (en) | 2017-06-29 |
| PE20170513A1 (en) | 2017-05-06 |
| JP2017528594A (en) | 2017-09-28 |
| CN107075606A (en) | 2017-08-18 |
| EP3167084A1 (en) | 2017-05-17 |
| PH12016502597A1 (en) | 2017-04-24 |
| AU2015285988A1 (en) | 2017-02-02 |
| CL2017000062A1 (en) | 2017-08-11 |
| KR20170047227A (en) | 2017-05-04 |
| DE102014010442A1 (en) | 2016-01-14 |
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