CN107354259A - A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace - Google Patents
A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace Download PDFInfo
- Publication number
- CN107354259A CN107354259A CN201710655159.0A CN201710655159A CN107354259A CN 107354259 A CN107354259 A CN 107354259A CN 201710655159 A CN201710655159 A CN 201710655159A CN 107354259 A CN107354259 A CN 107354259A
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- CN
- China
- Prior art keywords
- shaft furnace
- coal
- heater
- direct reduction
- based direct
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- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
Abstract
A kind of method smelted the invention discloses coal-based direct reduction shaft furnace and using the shaft furnace, shaft furnace includes body of heater, the charging aperture located at body of heater upper end and the discharging opening located at body of heater lower end, distributing device is provided with the body of heater, close to feed inlet end, the side wall of the body of heater is provided with combustion chamber, and gas inlet and air inlet are respectively equipped with the combustion chamber.The method smelted using the shaft furnace, is comprised the following steps：In mass ratio 100:5~20:After ore, reducing agent and solvent are mixed and made into carbonaceous pelletizing by 5~15, it is placed in shaft furnace, regulation coal gas, air mass flow and in-furnace temperature, makes the carbon reducing metal oxide in pelletizing, produce metallized pellet.Advantage is that the shaft furnace is static device, is not required to drive device, substantially reduces power consumption, while cloth full with substance in stove, and stove usage factor is high, and equipment capacity is big.
Description
Technical field
The invention belongs to non-blast furnace ironmaking field, more particularly to a kind of coal-based direct reduction shaft furnace and use shaft furnace progress
The method of smelting.
Background technology
Metallized pellet is that iron ore is reduced directly to metallic iron under solid conditions, because metallized pellet is without superfusion
Refining, forms microporous structure, shape is like sponge, therefore also known as sponge iron in deoxidation process.The alternative steel scrap conduct of sponge iron
Electric furnace raw material, but the also raw material of other melting and reducings.
Direct-reduction can be divided into coal-based direct reduction, gas base directly reducing and electric heating according to the main body energy and be reduced directly.Pass
The coal-based direct reduction equipment of system mainly has rotary kiln, tunnel cave etc., and its maximum is characterised by that equipment body is to move, material
Moved with together with equipment, stove usage factor is low, while power consumption is higher.
The content of the invention
Goal of the invention：The first object of the present invention is to provide a kind of melting electric consumption that can reduce coal base reduction device, carried
The reduction shaft furnace of high equipment capacity；
The second object of the present invention is to provide the method smelted using the shaft furnace.
Technical scheme：The direct-reduction shaft furnace of the present invention, including body of heater, the charging aperture located at body of heater upper end and located at body of heater
The discharging opening of lower end, the body of heater is interior, is provided with distributing device close to feed inlet end, and the side wall of the body of heater is provided with combustion chamber, the combustion
Burn and be respectively equipped with gas inlet and air inlet on room, waste gas outlet is set on the body of heater.
Furtherly, body of heater is provided with 1~8 discharging opening；Combustion chamber is located at the middle part or middle and lower part of body of heater.
Further say, distributing device of the invention is equally distributed some cloth tube clothes or revolving top.
The method that the present invention is smelted using direct-reduction shaft furnace, comprises the following steps：In mass ratio 100:5~20:5
After ore, reducing agent and solvent are mixed and made into carbonaceous pelletizing by~15, be placed in shaft furnace, regulation coal gas, air mass flow and
In-furnace temperature, make the carbon reducing metal oxide in pelletizing, produce metallized pellet.
Furtherly, ore includes iron ore concentrate, vanadium titano-magnetite, vanadium titanium sea sand, lateritic nickel ore or chromite；Reducing agent
Including anthracite, blue carbon, semicoke；Solvent includes lime stone, dolomite, silica；In-furnace temperature is 600~1400 DEG C.
Beneficial effect：Compared with prior art, remarkable advantage of the invention is：With traditional coal base reduction rotary kiln, tunnel
The equipment such as kiln are compared, and the shaft furnace is static device, is not required to drive device, substantially reduces power consumption, while cloth full with substance in stove, stove
Usage factor is high, and equipment capacity is big.Compared with existing acid pellet shaft furnace, existing gas-based shaft kiln, the coal-based direct reduction shaft furnace,
It uses carbon-burdened pellet as raw material, and the DRI containing valuable metal with high added value is smelted by coal base reduction,
It can effectively solve the problem that the drawbacks of existing gas-based shaft kiln is to reducing gas requirement harshness.
Brief description of the drawings
Fig. 1 is the structural representation of present invention direct-reduction shaft furnace.
Embodiment
Technical scheme is described in further details with reference to embodiment and accompanying drawing.
As shown in figure 1, the present invention coal-based direct reduction shaft furnace, including body of heater 1, the charging aperture 2 located at the upper end of body of heater 1 and
Discharging opening 3 located at the lower end of body of heater 1, the discharging opening 3 can be 1~8.Cloth is provided with the body of heater 1, close to the end of charging aperture 2
Device 4, the side wall at the middle part of body of heater 1 or middle and lower part are provided with combustion chamber 5, gas inlet 6 and sky are respectively equipped with the combustion chamber 5
Gas air inlet 7, waste gas outlet 8 is additionally provided with the body of heater 1.Wherein, distributing device 4 is equally distributed some cloth tube clothes or rotation
Turn distributing device.
Operation principle：Carbonaceous pelletizing is distributed into stove from charging aperture 2 through distributing device 4, coal gas, air respectively through gas inlet 6,
Air intlet 7, which enters in combustion chamber 5, to burn, and the high-temperature gas of production enters in stove, there is provided needed for carbonaceous pelletizing direct-reduction
Heat.Pelletizing carbon direct-reduction metal oxide, generates metallized pellet, from bottom discharge mouth at a temperature of 600~1400 DEG C
3 discharges, waste gas flow out from waste gas outlet 8.
The method that the present invention is smelted using direct-reduction shaft furnace, comprises the following steps：
(1) material such as ore, reducing agent, flux is prepared into carbonaceous pelletizing through levigate mixed pelletizing, by adjust flux,
Reducing agent amount of allocating, regulation ore, reducing agent, flux granularity, adjusts reduction reaction effect, wherein, ore, reducing agent, flux
Mass ratio be 100:5~20:5~15；
(2) carbonaceous pelletizing, by controlling coal gas, air mass flow, adjusts in-furnace temperature, made in pelletizing in shaft furnace device
Carbon reducing metal oxide, produce metallized pellet.
Embodiment 1
Setting handles 300,000 tons of iron ore concentrate coal base reduction shaft furnaces year, using blast furnace gas as combustion gas, in mass ratio 100:
15:After iron ore concentrate, blue carbon and lime stone are mixed and made into carbonaceous pelletizing by 10, it is placed in shaft furnace, adjusts gas flow 22000
~25000Nm3/ h, 70000~80000Nm of air mass flow3850 DEG C of/h and in-furnace temperature, aoxidize the carbon reducing metal in pelletizing
Thing, produce metallized pellet.
Embodiment 2
Setting handles 500,000 tons of lateritic nickel ore coal base reduction shaft furnaces year, using coke-stove gas as combustion gas, in mass ratio
100:10:After lateritic nickel ore, anthracite and dolomite are mixed and made into carbonaceous pelletizing by 5, it is placed in shaft furnace, adjusts Gas Flow
Measure 5000~6000Nm3/ h, 32000~40000Nm of air mass flow3800 DEG C of/h and in-furnace temperature, the carbon in pelletizing is set to reduce gold
Belong to oxide, produce metallized pellet.
Embodiment 3
Setting handles 800,000 tons of chromite coal base reduction shaft furnaces year, using natural gas as combustion gas, in mass ratio 100:20:
After chromite, blue carbon and lime stone, silica are mixed and made into carbonaceous pelletizing by 10, it is placed in shaft furnace, adjusts natural gas 8000
~9000Nm3/ h, 60000~70000Nm of air mass flow31200 DEG C of/h and in-furnace temperature, aoxidize the carbon reducing metal in pelletizing
Thing, produce metallized pellet.
Wherein, vanadium titanium sea sand can be replaced vanadium titano-magnetite or vanadium titanium sea sand ore deposit in the embodiment.
Claims (9)
1. a kind of coal-based direct reduction shaft furnace, including body of heater (1), the charging aperture (2) located at body of heater (1) upper end and located at body of heater
(1) discharging opening (3) of lower end, it is characterised in that：Distributing device (4) is provided with the body of heater (1), close to charging aperture (2) end, it is described
The side wall of body of heater (1) is provided with combustion chamber (5), and gas inlet (6) and air inlet (7) are respectively equipped with the combustion chamber (5),
Waste gas outlet (8) is set on the body of heater (1).
2. coal-based direct reduction shaft furnace according to claim 1, it is characterised in that：The distributing device (4) is to be uniformly distributed
Some cloth tube clothes or revolving top.
3. coal-based direct reduction shaft furnace according to claim 1, it is characterised in that：The discharging opening (3) is 1~8.
4. coal-based direct reduction shaft furnace according to claim 1, it is characterised in that：The combustion chamber (5) is located at body of heater (1)
Middle part or middle and lower part.
5. a kind of method that coal-based direct reduction shaft furnace using described in claim any one of 1-4 is smelted, its feature exist
In comprising the following steps：In mass ratio 100:5~20:After ore, reducing agent and solvent are mixed and made into carbonaceous pelletizing by 5~15,
It is placed in the shaft furnace, regulation coal gas, air mass flow and in-furnace temperature, makes the carbon reducing metal oxide in pelletizing, produce
Metallized pellet.
6. the method according to claim 5 smelted using coal-based direct reduction shaft furnace, it is characterised in that：The ore deposit
Stone includes iron ore concentrate, vanadium titano-magnetite, vanadium titanium sea sand, lateritic nickel ore or chromite.
7. the method according to claim 5 smelted using coal-based direct reduction shaft furnace, it is characterised in that：It is described to go back
Former agent includes anthracite, blue carbon or semicoke.
8. the method according to claim 5 smelted using coal-based direct reduction shaft furnace, it is characterised in that：It is described molten
Agent includes lime stone, dolomite or silica.
9. the method according to claim 5 smelted using coal-based direct reduction shaft furnace, it is characterised in that：The stove
Interior temperature is 600~1400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655159.0A CN107354259A (en) | 2017-08-03 | 2017-08-03 | A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655159.0A CN107354259A (en) | 2017-08-03 | 2017-08-03 | A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107354259A true CN107354259A (en) | 2017-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710655159.0A Pending CN107354259A (en) | 2017-08-03 | 2017-08-03 | A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace |
Country Status (1)
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| CN (1) | CN107354259A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410990A (en) * | 2022-01-20 | 2022-04-29 | 石棉蓝翔冶金材料有限公司 | Device and method for reducing vanadium by using submerged arc furnace |
| CN115305304A (en) * | 2022-08-14 | 2022-11-08 | 新疆八一钢铁股份有限公司 | Multi-element furnace burden structure iron-making method of Europe smelting furnace |
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| CN1102215A (en) * | 1993-10-29 | 1995-05-03 | 鞍山钢铁学院 | Method for producing direct reduced iron |
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| CN1109911A (en) * | 1995-03-11 | 1995-10-11 | 宝山钢铁(集团)公司 | Method for producing spongy iron by coal-base gas-making in vertical furnace |
| CN1435500A (en) * | 2002-01-31 | 2003-08-13 | 宝山钢铁股份有限公司 | Method for smelting chromium-contg. melted iron with powder ore cooled agglomerated pellet |
| CN201589515U (en) * | 2009-11-25 | 2010-09-22 | 杨光 | Roasting reduction shaft furnace |
| CN103205561A (en) * | 2013-03-18 | 2013-07-17 | 酒泉钢铁(集团)有限责任公司 | Coal-based magnetic roasting method for powdery refractory low-grade iron ore carbon-bearing pellets by pellet shaft furnace |
| CN103849760A (en) * | 2014-01-28 | 2014-06-11 | 酒泉钢铁(集团)有限责任公司 | Shaft furnace of efficiently controlling iron ores to be magnetized and roasting method thereof |
| CN104278147A (en) * | 2013-07-03 | 2015-01-14 | 中冶东方工程技术有限公司秦皇岛研究设计院 | Method for producing direct reduced iron by adopting carbon-containing pellets |
| CN204661791U (en) * | 2015-03-25 | 2015-09-23 | 许柏宁 | Two-stage calcination method ore reduction volatilization interlock production system |
-
2017
- 2017-08-03 CN CN201710655159.0A patent/CN107354259A/en active Pending
Patent Citations (10)
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| CN1102215A (en) * | 1993-10-29 | 1995-05-03 | 鞍山钢铁学院 | Method for producing direct reduced iron |
| CN1099418A (en) * | 1994-08-02 | 1995-03-01 | 冶金工业部钢铁研究总院 | Method and device of reduction iron-smelting for cold-coagulated carboniferous briquet |
| CN1102440A (en) * | 1994-08-27 | 1995-05-10 | 冶金工业部钢铁研究总院 | Fusion reducing iron smelting method and its equipment |
| CN1109911A (en) * | 1995-03-11 | 1995-10-11 | 宝山钢铁(集团)公司 | Method for producing spongy iron by coal-base gas-making in vertical furnace |
| CN1435500A (en) * | 2002-01-31 | 2003-08-13 | 宝山钢铁股份有限公司 | Method for smelting chromium-contg. melted iron with powder ore cooled agglomerated pellet |
| CN201589515U (en) * | 2009-11-25 | 2010-09-22 | 杨光 | Roasting reduction shaft furnace |
| CN103205561A (en) * | 2013-03-18 | 2013-07-17 | 酒泉钢铁(集团)有限责任公司 | Coal-based magnetic roasting method for powdery refractory low-grade iron ore carbon-bearing pellets by pellet shaft furnace |
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| CN204661791U (en) * | 2015-03-25 | 2015-09-23 | 许柏宁 | Two-stage calcination method ore reduction volatilization interlock production system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410990A (en) * | 2022-01-20 | 2022-04-29 | 石棉蓝翔冶金材料有限公司 | Device and method for reducing vanadium by using submerged arc furnace |
| CN115305304A (en) * | 2022-08-14 | 2022-11-08 | 新疆八一钢铁股份有限公司 | Multi-element furnace burden structure iron-making method of Europe smelting furnace |
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