CN103261445B - Apparatus for manufacturing molten steel, and method for manufacturing molten steel using same - Google Patents
Apparatus for manufacturing molten steel, and method for manufacturing molten steel using same Download PDFInfo
- Publication number
- CN103261445B CN103261445B CN201180060164.8A CN201180060164A CN103261445B CN 103261445 B CN103261445 B CN 103261445B CN 201180060164 A CN201180060164 A CN 201180060164A CN 103261445 B CN103261445 B CN 103261445B
- Authority
- CN
- China
- Prior art keywords
- iron
- main part
- molten iron
- coal
- rotary kiln
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/06—Making pig-iron other than in blast furnaces in rotary kilns
-
- 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
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/33—Arrangement of devices for discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Provided are an apparatus for manufacturing molten steel and a method for manufacturing molten steel using same. The apparatus for manufacturing molten steel includes a rotary kiln configured to reduce iron ore to form reduced iron, and an electric furnace receiving the reduced iron manufactured in the rotary kiln in order to manufacture the molten steel. The rotary kiln includes a body part into which the iron ore is moved and a in which the iron ore is reduced. A loading hole through which raw material and fuel are loaded, and a gas discharge hole for discharging gas, are defined in one side of the body part; and a discharge hole for discharging the reduced iron, and a combustion part in which pulverized coal injection and combustion are performed, are disposed in the other side of the body part. Also, the body part has a plurality of air inflow holes through which air is introduced.
Description
Technical field
The present invention relates to a kind of molten iron preparation method who prepares the molten iron preparation facilities of molten iron and use this device, in more detail, be a kind of by the reduced iron of preparing at rotary kiln electric furnace melting and reduction, prepare thus the molten iron preparation facilities of molten iron and use the molten iron preparation method of this device.
Background technology
In the preparation of existing molten iron, also do not develop aspect efficiency or productivity aspect can surmount the iron-smelting process of blast furnace technology.
In this blast furnace technology, as mainly depending on as the carbon source of fuel and reductive agent the coke that specified raw material carbon is carried out to processing treatment, and mainly depend on the agglomerate through a series of consolidated block technique as source of iron.
Therefore, existing blast furnace technology must possess the raw material preliminary treatment equipment of coke Preparation equipment and agglomerating plant etc. simultaneously, owing to needing to append except blast-furnace equipment, other attendant equipments is set, and therefore this can need the cost of certain degree on equipment.
In addition, in raw material preliminary treatment equipment as above, considerable as SO owing to producing
x, NO
xor the environmental pollutants of dust etc., therefore need other equipment to carry out purifying treatment to it, particularly, because the specification of current whole world environmental pollution is more and more stricter, overcoming environmental pollution needs the investment cost of huge treatment facility, therefore in the molten iron production based on existing blast furnace technology, its competitive power reduces gradually.
Therefore,, for solve the problem occurring in this blast furnace technology, just carrying out the research and development of other kinds of processes.
Summary of the invention
The problem that invention will solve
The object of the invention is to, provide a kind of can with low cost and environmental protection use rudimentary raw material and prepare the molten iron preparation facilities of molten iron and use the molten iron preparation method of this device.
Solve the method for problem
Below, the present invention will be described.
An aspect of of the present present invention provides a kind of molten iron preparation facilities, comprising: rotary kiln, and its mode of preparing reduced iron with reducing iron ore forms; Electric furnace, it is received in the reduced iron of preparing by reduction in this rotary kiln and is prepared into molten iron, described rotary kiln comprises main part, this main part so that the mode that iron ore is reduced when moving therein form; Be provided with for raw material and fuel are loaded to inner loading port and the gas discharge outlet for Exhaust Gas in a side of this main part, and be provided with the relief outlet for discharging reduced iron in its opposition side and can implement the burning portion that coal dust sprays and burns, and be provided with for the multiple air introducing ports to its inner importing air at this main part.
Another aspect of the present invention provides a kind of molten iron preparation method, prepares the step of reduced iron in rotary kiln by reducing iron ore; And the reduced iron of so preparation is supplied to electric furnace and prepares the step of molten iron, in the described step of preparing reduced iron, from a side direction internal feed iron ore, coal and the Wingdale of the main part of rotary kiln and it is moved to opposition side, and carry out coal dust injection and burning in opposition side, and to the internal feed air of main part, thereby when making thus iron ore move, be reduced and be formed as reduced iron, it is discharged from afterwards.
Invention effect
According to the present invention, can with low cost and environmental protection use rudimentary raw material and prepare molten iron.
Brief description of the drawings
Fig. 1 is the sketch chart that represents an example of molten iron preparation facilities according to the invention.
Fig. 2 is the sketch chart that represents an example of the rotary kiln of molten iron preparation facilities of the present invention.
Embodiment
Below, the present invention will be described in detail.
The present invention relates to a kind of molten iron preparation facilities and use the molten iron preparation method of this device, this molten iron preparation facilities comprises: rotary kiln, and its mode of preparing reduced iron with reducing iron ore forms; Electric furnace, it is received in the reduced iron of preparing by reduction in this rotary kiln and prepares molten iron.
Below, by brief description of the drawings the present invention.
Fig. 1 represents an example of molten iron preparation facilities according to the invention.
As shown in Figure 1, molten iron preparation facilities 1 of the present invention comprises: rotary kiln 10, and its mode of preparing reduced iron with reducing iron ore forms; Electric furnace 20, it is received in the reduced iron of preparing by reduction in rotary kiln 10 and prepares molten iron.
Fig. 2 represents an example of rotary kiln of the present invention, as shown in Figure 2, rotary kiln 20 of the present invention comprises main part 11, the mode that this main part 11 is reduced when movement therein with iron ore forms, be provided with the gas discharge outlet 112 that raw material and fuel is loaded to inner loading port 111 and Exhaust Gas, the burning portion 114 that is provided with the reduced iron relief outlet 113 for discharging reduced iron in its opposition side and can carries out coal dust injection and burning in a side of this main part 11.
At the main part 11 of above-mentioned rotary kiln, be provided with to its inner multiple air introducing ports 115 that import air.
In the substantial middle portion of the length direction of the main part 11 of above-mentioned rotary kiln, be provided with the coal loading port 1111 for packing coal into.
Above-mentioned coal loading port 1111 is for supplying with reducing gas between the central part in main part and top ends.
More than the length of above-mentioned rotary kiln is preferably set to 130m.
In the case of the length of above-mentioned rotary kiln is short, that is, in the time that the coal by supplying with from above-mentioned loading port 111 can provide reducing gas fully, coal loading port 1111 can be set.
Above-mentioned molten iron preparation facilities 1 comprises the iron ore funnel 30 that holds and supply with iron ore, above-mentioned iron ore funnel 30 via raw material supplying pipe 31 so that the mode of iron ore dredging be connected with loading port 111.
Except above-mentioned iron ore funnel 30, be connected with at above-mentioned raw materials supply-pipe 31: Wingdale supply-pipe 41, itself so that the mode of Wingdale dredging be connected with limestone storage source (not shown); And coal supply-pipe 51, it is so that the mode of coal dredging is stored funnel 50 with the coal of storage coal is connected.
Coal supply-pipe 51 between above-mentioned coal storage funnel 50 and raw material supplying pipe 31, is provided with the block gasifying device 511 of coal.
At above-mentioned gas relief outlet 112 so that the mode of gas dredging be connected with for the gas outlet pipe 131 to outside combustion gas, can be provided with the first gas blower 1311, the first particle collector 1312, nitrogen and desulfurization device 1313, the second particle collector 1314 and the second gas blower 1315 etc. at this gas outlet pipe 131, can remove thus as the impurity of impure gas or dust etc. and make gas discharge transfiguration easy.
The end of above-mentioned gas relief outlet 131 is connected with chimney 1316.
Be provided with electrode bar 21 and electric furnace exhaust emission tube 22 at above-mentioned electric furnace 20.
For example can use three pairs of electrode bars as above-mentioned electrode bar 21.
Above-mentioned electric furnace exhaust emission tube 22 is connected with iron ore funnel 30, and the electric furnace exhaust emission tube 22 between above-mentioned electric furnace 20 and iron ore funnel 30 is provided with the 3rd particle collector 221.
Be provided with slag notch for discharging slag and for discharging the iron notch of molten iron at above-mentioned electric furnace 20, for example, preferably each two top slag notches and bottom iron notch of arranging respectively.
Above-mentioned rotary kiln 10 can, so that the mode of reduced iron dredging is connected via reduced iron supply-pipe 116, in this case, can be provided with reduced iron consolidated block device 1161 at above-mentioned reduced iron supply-pipe 116 with electric furnace 20.
Below, with reference to figure 1 and Fig. 2, the method for preparing molten iron of the present invention is described.
As shown in Figure 1, in the present invention, first prepare reduced iron at rotary kiln 10 reducing iron ores for preparing molten iron.
; via the loading port 111 of the main part 11 of above-mentioned rotary kiln 10; move to internal feed iron ore, coal and Wingdale; carry out coal dust injection and burning in burning portion 114; internal feed air via from air introducing port 115 to main part, is prepared into reduced iron thereby make thus iron ore move and be reduced.
Now, in the case of the length of above-mentioned rotary kiln is long, in the substantial middle portion of the length direction of main part 11, coal loading port 1111 is set, and packs coal into via this coal loading port 1111.
As mentioned above, in the situation that packing coal into via coal loading port 1111, between the central part in main part and top ends, supply with the reducing gas producing by coal, therefore can improve reduction ratio.
As above-mentioned iron ore, can use powder iron ore or lump ore or these mixing ore deposit.
For example, can use the iron ore that granularity is 8-22mm, preferably use the iron ore that granularity is 8-12mm, now can make degree of metalization reach more than 94%.
As above-mentioned iron ore, for example, can use and comprise T.Fe:66.3 % by weight, SiO
2: 3.15 % by weight, Al
2o
3: 1.20 % by weight, K
2the iron ore of O:0.09 % by weight, P:0.06 % by weight and S:0.019 % by weight.
Above-mentioned coal plays the effect as carbon supply source such as ore reduction, and its granularity is preferably roughly 6-16mm left and right, and it mixes and pack into ore at rotary kiln entrance.
Above-mentioned coal dust is blown in the lower end of rotary kiln, thus for maintaining the temperature in freeboard region (Free Space Zone) of rotary kiln, its granularity is preferably below 6mm, and what more preferably granularity was 2-6mm accounts for 70-80%, and granularity is accounting for about 20-30% below 2mm.
Coal dust usage quantity in above-mentioned burning portion can change according to the temperature in freeboard region.
Above-mentioned Wingdale is supplied with for the desulfurization of coal, for example, at rotary kiln inlet side, the dolomite of 1-3mm is mixed and is packed into ore, coal.
Above-mentioned Wingdale is converted to unslaked lime (CaCO
3+ heat → CaO+CO
2), in the melting process of electric furnace, play thus the effect that reduces the S in molten iron.
Main reflection mechanism (Mechanism) in ore+coal bed (Coal Bed) in the main part of above-mentioned rotary kiln is as follows.
C+CO
2→2CO
3Fe
2O
3+CO→2Fe
3O
4+CO
2
Fe
3O
4+CO→3FeO+CO
2
FeO+CO→Fe+CO
2
(Free Space Zone) is as lower area in freeboard region: make CO gaseous combustion by dropping into air (Air), simultaneously by exothermic reaction heat supply; Temperature is maintained to 900-1200 DEG C, thereby maintain the indirect reduction atmosphere of the iron ore forming by CO gas.
The temperature in the freeboard region of the rearward end of combustion gas preferably maintains 900-1000 DEG C, and the temperature of supplying with the freeboard region of the top ends of coal dust is preferably 900-1200 DEG C.
For the reduction of ore in above-mentioned coal bed, atmosphere temperature distribution, compared with direct-reduction based on carbon, mainly there is the indirect reduction based on CO gas, in order to make C+CO
2the reaction of → 2CO is active, atmosphere temperature is preferably maintained to 1,000-1,100 DEG C of left and right.
The waste gas producing time prepared by above-mentioned reduced iron, discharge in atmosphere via gas discharge outlet 112, gas outlet pipe 113, the first gas blowers 1311, the first particle collector 1312, nitrogen and desulfurization device 1313, the second particle collector 1314, the second gas blower 1315 and chimney 1316.
Then, the reduced iron of preparing in mode as above, for example, be supplied to electric furnace 20 and be prepared into molten iron via reduced iron supply-pipe 116.Now, reduced iron, it can become bulk by reduced iron consolidated block device 1161, is loaded to electric furnace 20.
Above-mentioned electric furnace 20 receive 950-1000 DEG C of degree high temperature reduction iron and by its melting, thereby and append reduction and prepare molten iron.
Be immersed in the electrode bar 21 of the slag layer of electric furnace 20, for example, by three pairs of electrode bar melting and reducing iron, with melting time, a certain amount of coal by reduced iron inside makes residual reduction of ferrous oxide, removes the S (CaO+FeS+C → CaS+Fe+CO) in molten iron by being included in the CaO of reduced iron.
Description of reference numerals
1: molten iron preparation facilities
10: rotary kiln
20: electric furnace
30: iron ore funnel
50: coal storage funnel
11: main part
111: loading port
112: gas discharge outlet
113: reduced iron relief outlet
114: burning portion
115: air introducing port
21: electrode bar
22: electric furnace exhaust emission tube
Claims (9)
1. a molten iron preparation facilities, comprising: rotary kiln, and its mode of preparing reduced iron with reducing iron ore forms; Electric furnace, it is received in the reduced iron of preparing by reduction in this rotary kiln and is prepared into molten iron,
Described rotary kiln comprises main part, this main part so that the mode that iron ore is reduced when moving therein form; Be provided with for raw material and fuel are loaded to inner loading port and the gas discharge outlet for Exhaust Gas in a side of this main part, and be provided with the relief outlet for discharging reduced iron in its opposition side and can implement the burning portion that coal dust sprays and burns, and be provided with for the multiple air introducing ports to its inner importing air at this main part.
2. molten iron preparation facilities claimed in claim 1, is characterized in that,
At the central part of the length direction of described main part, be provided with the coal loading port for packing coal into.
3. a molten iron preparation method, it comprises: the step of preparing reduced iron in rotary kiln by reducing iron ore; And the reduced iron of so preparation is supplied to electric furnace and prepares the step of molten iron,
In the described step of preparing reduced iron, from a side direction internal feed iron ore, coal and the Wingdale of the main part of rotary kiln and it is moved to opposition side, and carry out coal dust injection and burning in opposition side, and to the internal feed air of main part, thereby when making thus iron ore move, be reduced and be formed as reduced iron, it is discharged from afterwards.
4. molten iron preparation method claimed in claim 3, is characterized in that,
Central part at the length direction of described main part is supplied with coal.
5. molten iron preparation method claimed in claim 3, is characterized in that,
Described iron ore is powder iron ore, lump ore or these mixing ore deposit.
6. molten iron preparation method claimed in claim 3, is characterized in that,
The granularity of described iron ore is 8-22mm, and the granularity of described coal is 6-16mm, and the granularity of described coal dust is below 6mm.
7. molten iron preparation method claimed in claim 3, is characterized in that,
Described main part comprises freeboard region, and described freeboard region is to make CO gaseous combustion by dropping into air, and by the region of exothermic reaction heat supply, the temperature in described freeboard region is 900-1200 DEG C simultaneously.
8. molten iron preparation method claimed in claim 7, is characterized in that,
The temperature in the freeboard region of the rearward end of the main part of combustion gas is 900-1000 DEG C, and the freeboard region temperature of the top ends of the main part of supply coal dust is 900-1200 DEG C.
9. any one molten iron preparation method described in claim 3-8, is characterized in that,
The temperature that is supplied to the reduced iron of described electric furnace is 950-1000 DEG C.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100137282A KR101220554B1 (en) | 2010-12-28 | 2010-12-28 | Apparatus for Manufacturing Molten Iron and Method for Manufacturing Molten Iron Using the Apparatus |
| KR10-2010-0137282 | 2010-12-28 | ||
| PCT/KR2011/010151 WO2012091407A2 (en) | 2010-12-28 | 2011-12-27 | Apparatus for manufacturing molten steel, and method for manufacturing molten steel using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103261445A CN103261445A (en) | 2013-08-21 |
| CN103261445B true CN103261445B (en) | 2014-10-15 |
Family
ID=46383684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180060164.8A Expired - Fee Related CN103261445B (en) | 2010-12-28 | 2011-12-27 | Apparatus for manufacturing molten steel, and method for manufacturing molten steel using same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2014505169A (en) |
| KR (1) | KR101220554B1 (en) |
| CN (1) | CN103261445B (en) |
| WO (1) | WO2012091407A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101442920B1 (en) * | 2012-12-18 | 2014-09-22 | 주식회사 포스코 | Manufacturing method and apparatus for reduced iron |
| US9795141B2 (en) | 2013-01-14 | 2017-10-24 | Dmr International, Inc. | Antimicrobial polymer systems using multifunctional organometallic additives for polyurethane hosts |
| US10455831B2 (en) | 2013-03-15 | 2019-10-29 | Dmr International, Inc. | Liquid material systems with multifunctional organometallic additives |
| US20190017745A1 (en) * | 2017-07-11 | 2019-01-17 | Air Products And Chemicals, Inc. | Systems and Methods for Preheating Metal-Containing Pellets |
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| KR890001441B1 (en) * | 1981-11-03 | 1989-05-03 | 알 엔 영거 | Method and system for supplying reducing agent for rotary kiln |
| CN1641045A (en) * | 2005-01-07 | 2005-07-20 | 四川龙蟒集团有限责任公司 | Method for separating and extracting metal element from varadium-titanium magnetite |
| CN1753843A (en) * | 2003-02-24 | 2006-03-29 | Posco公司 | Method and burner apparatus for injecting a pulverized coal into rotary kilns, method and apparatus for producing cao using them |
| CN101134985A (en) * | 2007-03-15 | 2008-03-05 | 大连熔融还原设备制造有限公司 | Smelting-separating furnace iron-smelting method for coal radical metallized pellet reduction |
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| US3912501A (en) * | 1971-05-11 | 1975-10-14 | Castejon Javier Gonzalez De | Method for the production of iron and steel |
| US3938987A (en) * | 1973-04-23 | 1976-02-17 | Mcdowell-Wellman Engineering Company | Process for preparing a smelter furnace charge composition |
| AT327253B (en) * | 1974-02-22 | 1976-01-26 | Voest Ag | METHOD AND DEVICE FOR THE PREVENTION OF IRON ORES |
| JPS5262103A (en) | 1975-11-19 | 1977-05-23 | Showa Denko Kk | Method of reduction roasting of ores |
| FR2338994A1 (en) * | 1976-01-20 | 1977-08-19 | Renault | STEEL PROCESSING PROCESS FROM PRE-REDUCED ORES |
| JPS5849615B2 (en) * | 1981-06-03 | 1983-11-05 | 中外炉工業株式会社 | Method and equipment for producing reduced iron |
| JPS57203707A (en) * | 1981-06-09 | 1982-12-14 | Sumitomo Heavy Ind Ltd | Charging method for carbon material into reducing furnace |
| JPS6044368B2 (en) * | 1983-06-07 | 1985-10-03 | 強 上山 | Direct steel manufacturing method |
| JPS6169944A (en) | 1984-09-13 | 1986-04-10 | Nippon Steel Corp | Manufacture by melting and reducing of ferrochrome |
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| JPH1172211A (en) | 1997-08-28 | 1999-03-16 | Chisaki:Kk | Burning furnace of powdery grain material |
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-
2010
- 2010-12-28 KR KR1020100137282A patent/KR101220554B1/en active IP Right Grant
-
2011
- 2011-12-27 WO PCT/KR2011/010151 patent/WO2012091407A2/en active Application Filing
- 2011-12-27 JP JP2013547331A patent/JP2014505169A/en active Pending
- 2011-12-27 CN CN201180060164.8A patent/CN103261445B/en not_active Expired - Fee Related
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| KR890001441B1 (en) * | 1981-11-03 | 1989-05-03 | 알 엔 영거 | Method and system for supplying reducing agent for rotary kiln |
| CN1753843A (en) * | 2003-02-24 | 2006-03-29 | Posco公司 | Method and burner apparatus for injecting a pulverized coal into rotary kilns, method and apparatus for producing cao using them |
| CN1641045A (en) * | 2005-01-07 | 2005-07-20 | 四川龙蟒集团有限责任公司 | Method for separating and extracting metal element from varadium-titanium magnetite |
| CN101134985A (en) * | 2007-03-15 | 2008-03-05 | 大连熔融还原设备制造有限公司 | Smelting-separating furnace iron-smelting method for coal radical metallized pellet reduction |
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| JP昭61-069944A 1986.04.10 |
| JP特开平11-72211A 1999.03.16 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101220554B1 (en) | 2013-01-10 |
| WO2012091407A3 (en) | 2012-09-13 |
| CN103261445A (en) | 2013-08-21 |
| WO2012091407A2 (en) | 2012-07-05 |
| KR20120075226A (en) | 2012-07-06 |
| JP2014505169A (en) | 2014-02-27 |
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