CN101906501A - Direct steelmaking process by using fine ores, coal and oxygen - Google Patents
Direct steelmaking process by using fine ores, coal and oxygen Download PDFInfo
- Publication number
- CN101906501A CN101906501A CN 201010242934 CN201010242934A CN101906501A CN 101906501 A CN101906501 A CN 101906501A CN 201010242934 CN201010242934 CN 201010242934 CN 201010242934 A CN201010242934 A CN 201010242934A CN 101906501 A CN101906501 A CN 101906501A
- Authority
- CN
- China
- Prior art keywords
- direct steelmaking
- gas
- stove
- oxygen
- direct
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a direct steelmaking process by using fine ores, coal and oxygen. Coal dust and oxygen are blown into a high-temperature melt to produce reducing gas; by utilizing the advantages of gas phase suspension preheating of fine iron ore and high speed and high efficiency of gas phase reduction, the fine iron ore is preheated and reduced respectively in a cyclonic preheater and a recirculating fluidized bed; and the obtained pre-reduced fine iron ore with the metallization rate of over 90 percent is blown into the high-temperature melt to form molten steel. Due to the reduction at lower temperature, the generated pre-reduced fine iron ore achieves less carburization, and less decarbonization is achieved when the finished product molten steel is obtained. The direct steelmaking process simplifies the steelmaking production flow essentially. The direct steelmaking process has the advantages of high productivity, low energy consumption for each ton of steel, equipment and capital investment conservation, full simplification of physical distribution, no temperature loss in the molten iron transporting process, and easy implementation of production continuity and automatic control.
Description
Technical field
The present invention relates to the production technique of steel, relate in particular to a kind of technology with fine ore and coal oxygen direct production molten steel.
Background technology
Current most important Steel Production Flow Chart (long flow process) obtains molten steel from iron ore, needs to also have numerous auxiliary process links through sintering (or pelletizing), coking, blast furnace ironmaking, four main technique links of converter steelmaking.The reduction of iron ore is indirect reduction more than 70% in the blast furnace ironmaking, belong to gas-solid reaction, require blast furnace to keep air permeability and good, so the fine iron breeze that obtains after the lean ore ore dressing and rich ore lump ore powder all must could be for the blast furnace uses, promptly through oversintering (or pelletizing) technological process through agglomeration.The material treatment capacity of sintering (or pelletizing) accounts for second of Steel Complex (being only second to ironmaking produces), and energy consumption is only second to ironmaking and steel rolling and occupies the 3rd.The purposes of coke in blast furnace, be fuel and the ferriferous oxide reductive agent of smelting institute's heat requirement as providing on the one hand, this effect now part is replaced by coal powder injection, the coke more important role is after the softening fusion of ore, as the skeleton that supports stock column, be again the coal gas path simultaneously up to tens of meters.The ratio of coking coal in raw coal is less, and reserves are limited, and this brings sense of crisis certainly will for the development of the long flow process that relies on coking coal.The long flow process of tradition has developed into the peak, but the characteristics of blast furnace ironmaking have determined that traditional long flow process is in large scale, and investment is high, and the production cycle is long, the energy consumption per ton steel height, and environmental pollution is serious.
Directly reduction-electric furnace flow process also can obtain molten steel from iron ore, do not need coke, but the direct-reduced iron major part is produced with shaft furnace, still need the iron mineral powder agglomeration operation, and the natural gas source that need enrich, coal-based rotary kiln method production efficiency is low, and the rotary hearth furnace method is because the thin scale of the bed of material is difficult to expansion.Therefore directly reduction-electric furnace flow process still is difficult to and the long flow process competition of tradition, and the output of steel share in worldwide only accounts for 5%, and China then seldom.
Melting and reducing-bof process has changed the degree of dependence of traditional long flow process STRENGTH ON COKE, for example COREX fused reduction iron-smelting-bof process only needs a spot of coke, it only is divided into two the function of blast furnace on the principle, fusing separates after elder generation's gaseous state indirect reduction, and shortcoming also is conspicuous: the big (500m of oxygen-consumption
3/ t), the long flow process of output investment ratio tradition is high by 10%～20%, and tempo is slow.Melting and reducing-bof process is the change to operation before the long flow process iron of tradition.
Also have some patents to propose direct steelmaking or step steel-making, CN87101210A inventor makes reductive agent and fuel simultaneously with carbon in converter, and a large amount of CO of generation only do preheating and use, reclaim its physics heat, this is uneconomic, also is in theory to run counter to the ironmaking principle, can not be accomplished.He mention with intermediate frequency furnace or electric arc furnace direct steelmaking, do not utilize a large amount of CO of generation equally, power consumption will be very big, can not be used for producing.Patent CN1116240A and patent CN87101210A, author are same people, and the know-why basically identical increases and refinement on the content a little.
Patent CN1087951A obtains the technology of sponge iron, is equivalent to coal-based shaft furnace process in theory, and the ironmaking circle generally acknowledges that this technology is immature, and production cost is higher.Fatal shortcoming of this patent is that to enter superior part holding chamber up when the pore of high temperature reduction gas by sponge iron chute bottom, and during with the pre-thermal reduction of ore, the chute pore blocks easily, as changes the side-blown reducing gas into and then realize easily.This patent is not mentioned iron ore yet must agglomeration.Fine ore can not pass through reduction shaft furnace.The raw material that patent CN1348013A uses is a pellet, and the know-why that obtains sponge iron also is equivalent to coal-based shaft furnace process, compares infeasible economically with traditional process.
Patent CN1223301A produces sponge iron with the complex mechanism of tunnel furnace, charging ram and ploughshare plate, and its reaction mechanism is similar to coal-based rotary kiln technology, and patent CN1818082A reaction mechanism also is similar to coal-based rotary kiln technology, and production efficiency can not be high.
Patent CN1850997A proposes to use the induction furnace direct steelmaking, adding powdered iron ore, coal, flux obtain molten iron earlier in same induction furnace, oxygen blast and adding flux obtain molten steel in molten iron then, be feasible on know-why, but induction furnace small scale, power consumption is big, and is uneconomical, can not scale operation.
Patent CN1851000A proposes to utilize the converter direct steelmaking with the mixture block of powdered iron ore and pulverized anthracite, this method top BOTTOM OXYGEN simultaneously in the mixture block.BOTTOM OXYGEN only can be with the continuous oxidation of the Fe that restores, and the essence of this reaction is exactly the continuous oxidation of coal.Correct method should be to reduce with coal in the slag district, also can blow a spot of oxygen in the slag district to increase the heat of reaction, the amount of being blown into by control oxygen realizes coal reduced iron mineral, in gas phase zone oxygen blast secondary combustion, the heat of secondary combustion offers the heat absorption of slag district reduction reaction, but BOTTOM OXYGEN ferric oxide liquid never again.So the method coal consumption height of this patent proposition, and productivity is not necessarily high, big production gone up very difficult realization.
The iron smelting method that patent CN1073212A proposes, on the principle and the Huo Gewen Iron And Steel Company of Holland in 1988, British Steel Corporation consistent with the cyclone furnace formula melting and reducing flow process that gondola Yi Waer company develops.Cyclone furnace formula melting and reducing has only carried out interim test, so far without any progress.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of with fine ore and coal oxygen direct steelmaking technology.
The invention provides a kind of direct steelmaking technology, comprise the following steps:
1) be pre-formed a molten steel molten bath in the direct steelmaking stove, or slag blended molten bath, temperature is more than 1600 ℃;
2) in the direct steelmaking stove, be blown into coal dust and oxygen and flux, produce CO+H
2Content is the reducing gas of 85%～100% (volume ratio);
Reducing gas is opposite with the flow direction of breeze; Reducing gas is successively by reducing circulating fluidized bed, prereduction circulating fluidized bed, multistage cyclone preheater eventually, with the heat exchange of reverse direction mobile breeze; Reducing gas is cooled to 770 ℃～850 ℃ after heat exchange;
The tail gas that goes out cyclone preheater need remove CO wherein
2And water vapor, with the high temperature reduction gas heat exchange that goes out the direct steelmaking stove, be warming up to 770 ℃～850 ℃ again, and then feed circulating fluidized bed;
3) iron ore is finely ground to 100 orders～325 orders, gets the iron ore micro mist; This iron ore micro mist is promoted to the opening for feed of multistage cyclone preheater with the fine ore lift technique, flows through multistage cyclone preheater and prereduction circulating fluidized bed, reduction circulating fluidized bed eventually in turn; The iron ore micro mist is reduced gas preheating and reduction in fluidized-bed, obtains the powdered iron ore of degree of metalization 80%～100%;
4) in the direct steelmaking stove, be blown into through the powdered iron ore of preheating with reduction back degree of metalization 80%～100%, continue in the direct steelmaking stove, to be blown into coal dust and oxygen and flux simultaneously, by adjusting the ratio of powdered iron ore, coal dust, oxygen, flux, the carbon content that obtains molten steel remains on 0%～0.4%, remove most phosphorus simultaneously and a spot of sulphur obtains P＜0.05%, the molten steel of S＜0.1%, molten steel and slag constantly increase in the molten bath, flow out by siphon tapping mouth and slag notch.
Preferably, the ratio of coal dust, oxygen, flux is 100: 100～130: 5～20 step 2).
Preferably, step 2) and 4) described flux is lime, rhombspar or the mixture of the two, uses N
2Doing carrier gas is blown into by spray gun.Lime and rhombspar can mix with arbitrary proportion.
Preferably, step 2) described coal dust and oxygen are blown into telescopic coaloust-oxygen gun, and oxygen is by interior pipe, and coal dust is used N by outer tube
2Do carrier gas.
Preferably, step 2) tail gas in, temperature is 300～400 ℃.
Preferably, the described iron ore micro mist of step 3) will mix 1%～5% MgO or CaO or MgCO in ore grinding stage or circulating fluidized bed reduction process
3
Preferably, the ratio of the described powdered iron ore of step 4), coal dust, oxygen, flux is: 100: 20～50: 24～70: 5～10, and weight ratio.
Preferably, can reclaim direct steelmaking stove reducing gas, the exit gas of circulating fluidized beds at different levels and the sensible heat of cyclone preheater exit gas with the waste heat boiler cooling generates electricity.
The present invention also provides a kind of direct steelmaking equipment, comprises successively: multistage cyclone preheater (3), prereduction circulating fluidized bed (4), whole reduction circulating fluidized bed (5), direct steelmaking stove (6); Direct steelmaking stove (6) is barrel-shaped stove, comprises molten steel district (C), slag district (B) and gas phase zone (A) from bottom to top; Have fine ore blowing device (7), bottom blowing or side-blown coaloust-oxygen gun (8), direct steelmaking stove tap hole (9) and direct steelmaking stove slag notch (10) on the direct steelmaking stove (6); Reduction circulating fluidized bed (5) links to each other with direct steelmaking stove (6) by fine ore blowing device (7) eventually, and fine ore blowing device (7) is inserted in the molten steel district of direct steelmaking stove (6); The direct steelmaking furnace bottom blows or the coaloust-oxygen gun that blows side (8) is inserted in the bottom or lateral molten steel district of direct steelmaking stove (6), direct steelmaking stove slag notch (10) is positioned at furnace wall middle part, the direct steelmaking stove outside, has direct steelmaking stove tap hole (9) on the furnace wall of the direct steelmaking stove outside.
Preferably, described direct steelmaking equipment also comprises ore grinding powder equipment (1), fine ore lift technique (2), and ore grinding powder equipment (1) links to each other with multistage cyclone preheater (3) through fine ore lift technique (2).
Preferably, described direct steelmaking equipment also comprises gas heat exchanger, gas boosting equipment (12), gas purifying equipment (15), gas removal CO
2And H
2O equipment (17), the position is between interchanger and the outlet of direct steelmaking furnace gases.
The reducing gas that the direct steelmaking stove produces flows through reduction circulating fluidized bed (5), prereduction circulating fluidized bed (4), cyclone preheater (3) eventually successively; Pass through gas purifying equipment (15), gas heat exchanger (16) and gas removal CO then successively
2And H
2The gas that O equipment (17) and direct steelmaking stove come out mixes does reducing gas, enters reduction circulating fluidized bed eventually.
Described direct steelmaking stove tap hole is siphon tapping mouth (9).
Preferably, direct steelmaking stove (6) comprises anti-material system, water-cooling system, and waste-gas cleaning is handled and residual neat recovering system.
Advantage of the present invention is embodied in:
(1) the present invention is blown into high-temperature fusant with coal dust and oxygen and makes reducing gas, utilize gaseous suspension preheating of particulate powdered iron ore and the gas phase reduction rate is fast, efficient is high advantage, in cyclone preheater and circulating fluidized bed,, the pre-reduced iron breeze of the 90% above degree of metalization that obtains is blown into obtains molten steel in the high-temperature fusant respectively with powdered iron ore preheating, reduction.Because reduction under lower temperature (comparing with the direct reduction of blast furnace ironmaking), the prereduction iron powder carburizing of generation is few, and decarburization is few when obtaining the finished product molten steel; Blast furnace-the converter process of the production crude steel of existing main flow is followed from the operational path of iron ore → molten iron → molten steel, is the process of decarburization after the first carburetting.The present invention makes the STEELMAKING PRODUCTION flow process obtain in essence simplification.
(2) the present invention has realized from fine ore, coal, oxygen direct production molten steel, without agglomeration of fine ore, coking, also without the converter decarburization, compare with existing steelmaking process, equipment and initial cost are saved in a large number, and conservative calculating can be saved equipment and initial cost more than 30%; Logistics is fully simplified, in traditional Steel Plant, the logistics of each process procedure is very busy, and intensification cooling is for several times gone through in the iron content logistics, lose a large amount of physics heat, new direct steelmaking technology is very compact, and logistics is simply orderly, and has avoided the temperature loss of molten iron in transportation, be easy to realize directization of producing and control automatically, be intelligent Steel Plant of new generation, behind employing the present invention, great change takes place in the looks of Steel Plant.
Description of drawings
Device letter of the present invention shows that schema sees accompanying drawing 1.The 1st, the ore grinding powder equipment.The 2nd, the fine ore lift technique.The 3rd, the multistage cyclone preheater.The 4th, the prereduction circulating fluidized bed.The 5th, whole reduction circulating fluidized bed.The 6th, the direct steelmaking stove.In 6, the zone of A representative is a gas phase zone, and the zone of B representative is the slag district, and the zone of C representative is the molten steel district.The 7th, fine ore blowing device, the 8th, bottom blowing coaloust-oxygen gun, the 9th, direct steelmaking stove tap hole.The 10th, direct steelmaking stove slag notch.11, the 13,14, the 16th, gas heat exchanger, the 12nd, gas boosting equipment, the 15th, gas purifying equipment, the 17th, gas removal CO
2And H
2O equipment.On behalf of breeze, the line that has arrow: D flow to, and E represents gas flow, F represent pulverized coal flow to, G represents flow of oxygen to.
Embodiment
Following examples are to further specify of the present invention, but the present invention is not limited thereto.
Embodiment 1:
Direct steelmaking equipment of the present invention comprises: ore grinding powder equipment (1), fine ore lift technique (2), multistage cyclone preheater (3), prereduction circulating fluidized bed (4), reduction circulating fluidized bed (5) eventually, direct steelmaking stove (6), fine ore blowing device (7), bottom blowing or side-blown coaloust-oxygen gun (8), direct steelmaking stove tap hole (9), direct steelmaking stove slag notch (10), gas heat exchanger (11), (13), (14), (16), gas boosting equipment (12), gas purifying equipment (15), gas removal CO
2And H
2O equipment (17).
Direct steelmaking stove (6) is barrel-shaped stove, comprises slag district B, molten steel district C and gas phase zone A, and the longitudinal section as shown in Figure 1.
Reduction circulating fluidized bed (5) links to each other with direct steelmaking stove (6) by fine ore blowing device (7) eventually, and fine ore blowing device (7) is inserted in the molten steel molten bath of direct steelmaking stove (6); The direct steelmaking furnace bottom blows or the coaloust-oxygen gun that blows side (8) is inserted in the bottom or lateral molten steel molten bath of direct steelmaking stove (6), and the reducing gas that the direct steelmaking stove produces flows through reduction circulating fluidized bed (5), prereduction circulating fluidized bed (4), cyclone preheater (3) eventually successively.Direct steelmaking stove slag notch (10) is positioned at furnace wall middle part, the direct steelmaking stove outside, has direct steelmaking stove tap hole (9) on the furnace wall of the direct steelmaking stove outside.
Described direct steelmaking stove tap hole is siphon tapping mouth (9).
Direct steelmaking stove (6) also is provided with anti-material system, water-cooling system, and waste-gas cleaning is handled and residual neat recovering system.
In the direct steelmaking stove, be pre-formed a molten steel molten bath, or slag blended molten bath, temperature is at 1600 ℃; Be blown into coal dust and oxygen and CaO in the direct steelmaking stove, the ratio of coal dust, oxygen, CaO is: 100: 100: 5, produce CO+H
285%～100% reducing gas; Iron ore is finely ground to below 100 orders more than 325 orders, this micro mist is promoted to the opening for feed of multistage cyclone preheater with the fine ore lift technique, flow through multistage cyclone preheater and 2 grades of circulating fluidized beds in turn.Inlet at circulating fluidized bed mixes 1% MgO in breeze stream.The high temperature reduction gas that the direct steelmaking stove produces with remove CO
2Recycled offgas and circulating fluidized bed exit gas at different levels heat exchange after be cooled to 770 ℃～850 ℃, reducing gas is opposite with the flow direction of breeze, by 2 grades of circulating fluidized beds and multistage cyclone preheater.The reducing gas temperature of every grade of circulating fluidized bed outlet reduces, and the high temperature reduction gas that therefore need and go out the direct steelmaking stove carries out heat exchange to improve temperature.The recycled offgas that goes out cyclone preheater need remove CO wherein
2And water vapor, with the high temperature reduction gas heat exchange that goes out the direct steelmaking stove, be warming up to 850 ℃ again, feed circulating fluidized bed then; The degree of metalization that goes out the powdered iron ore of last step circulating fluidized bed reaches more than 90%;
In the direct steelmaking stove, be blown into the powdered iron ore more than 90% through preheating and reduction back degree of metalization with nitrogen, continue in the direct steelmaking stove, to be blown into coal dust and oxygen and CaO simultaneously, the weight ratio of powdered iron ore, coal dust, oxygen, CaO 100: 20: 24: 5, can be so that the carbon content of molten steel remains on below 0.4%, while phosphorus 0～0.03% and sulphur 0.1%, molten steel and slag constantly increase in the molten bath, flow out by siphon tapping mouth and slag notch.
The crude molten steel composition C 0.8% that obtains, Si, Mn:0～0.05% can obtain qualified molten steel through follow-up external refining and deoxidation alloying operation.
Embodiment 2:
The CaO of iron ore and 5% is mixed, enter ball mill grinding, miscellaneous equipment is with embodiment 1.
In the direct steelmaking stove, be pre-formed a molten steel molten bath, or slag blended molten bath, temperature is at 1600 ℃; Be blown into coal dust and oxygen and CaO in the direct steelmaking stove, the ratio of coal dust, oxygen, CaO is: 100: 130: 20, produce CO+H
285%～100% reducing gas; Iron ore is finely ground to below 100 orders more than 325 orders, this micro mist is promoted to the opening for feed of multistage cyclone preheater with the fine ore lift technique, flow through multistage cyclone preheater and 2 grades of circulating fluidized beds in turn.The high temperature reduction gas that the direct steelmaking stove produces with remove CO
2Recycled offgas and circulating fluidized bed exit gas at different levels heat exchange after be cooled to 770 ℃～850 ℃, reducing gas is opposite with the flow direction of breeze, by 2 grades of circulating fluidized beds and multistage cyclone preheater.The reducing gas temperature of every grade of circulating fluidized bed outlet reduces, and the high temperature reduction gas that therefore need and go out the direct steelmaking stove carries out heat exchange to improve temperature.The recycled offgas that goes out cyclone preheater need remove CO wherein
2And water vapor, with the high temperature reduction gas heat exchange that goes out the direct steelmaking stove, be warming up to 850 ℃ again, feed circulating fluidized bed then; The degree of metalization that goes out the powdered iron ore of last step circulating fluidized bed reaches more than 90%;
In the direct steelmaking stove, be blown into the powdered iron ore more than 90% through preheating and reduction back degree of metalization with nitrogen, continue in the direct steelmaking stove, to be blown into coal dust and oxygen, CaO simultaneously, the weight ratio of powdered iron ore, coal dust, oxygen, CaO 100: 50: 70: 10, can be so that the carbon content of molten steel remains on below 0.4%, while phosphorus 0～0.03% and sulphur 0.1%, molten steel and slag constantly increase in the molten bath, flow out by siphon tapping mouth and slag notch.
The crude molten steel composition C 0.1% that obtains, Si, Mn 0～0.04% can obtain qualified molten steel through follow-up external refining and deoxidation alloying operation.
The waste heat that will go out the tail gas of cyclone preheater is used for generating.Other is with embodiment 1.
Claims (10)
1. a direct steelmaking technology comprises the following steps:
1) be pre-formed a molten steel molten bath in the direct steelmaking stove, or slag blended molten bath, temperature is more than 1600 ℃;
2) in the direct steelmaking stove, be blown into coal dust and oxygen and flux, produce CO+H
2Content is the reducing gas of 85%～100% (volume ratio);
Reducing gas is opposite with the flow direction of breeze; Reducing gas is successively by reducing circulating fluidized bed, prereduction circulating fluidized bed, multistage cyclone preheater eventually, with the heat exchange of reverse direction mobile breeze; Reducing gas is cooled to 770 ℃～850 ℃ after heat exchange;
The tail gas that goes out cyclone preheater need remove CO wherein
2And water vapor, with the high temperature reduction gas heat exchange that goes out the direct steelmaking stove, be warming up to 770 ℃～850 ℃ again, and then feed circulating fluidized bed;
3) iron ore is finely ground to 100 orders～325 orders, gets the iron ore micro mist; This iron ore micro mist is promoted to the opening for feed of multistage cyclone preheater with the fine ore lift technique, flows through multistage cyclone preheater and prereduction circulating fluidized bed, reduction circulating fluidized bed eventually in turn; The iron ore micro mist is reduced gas preheating and reduction in fluidized-bed, obtains the powdered iron ore of degree of metalization 80%～100%;
4) in the direct steelmaking stove, be blown into through the powdered iron ore of preheating with reduction back degree of metalization 80%～100%, continue in the direct steelmaking stove, to be blown into coal dust and oxygen and flux simultaneously, by adjusting the ratio of powdered iron ore, coal dust, oxygen, flux, the carbon content that obtains molten steel remains on 0%～0.4%, remove most phosphorus simultaneously and a spot of sulphur obtains P＜0.05%, the molten steel of S＜0.1%, molten steel and slag constantly increase in the molten bath, flow out by siphon tapping mouth and slag notch.
2. direct steelmaking technology as claimed in claim 1 is characterized in that step 2) in the ratio of coal dust, oxygen, flux be 100: 100～130: 5～20.
3. direct steelmaking technology as claimed in claim 1 is characterized in that step 2) and 4) described flux is lime, rhombspar or the mixture of the two, uses N
2Do carrier gas and be blown into by spray gun, lime and rhombspar can mix with arbitrary proportion.
4. direct steelmaking technology as claimed in claim 1 is characterized in that step 2) described coal dust and oxygen is blown into telescopic coaloust-oxygen gun, and oxygen is by interior pipe, and coal dust is used N by outer tube
2Do carrier gas.
5. direct steelmaking technology as claimed in claim 1 is characterized in that, the described iron ore micro mist of step 3) will mix 1%～5% MgO or CaO or MgCO in ore grinding stage or circulating fluidized bed reduction process
3
6. direct steelmaking technology as claimed in claim 1 is characterized in that, the ratio of the described powdered iron ore of step 4), coal dust, oxygen, flux is: 100: 20～50: 24～70: 5～10, and weight ratio.
7. a direct steelmaking equipment comprises: multistage cyclone preheater (3), prereduction circulating fluidized bed (4), whole reduction circulating fluidized bed (5), direct steelmaking stove (6) successively; Direct steelmaking stove (6) is barrel-shaped stove, comprises molten steel district (C), slag district (B) and gas phase zone (A) from bottom to top; Have fine ore blowing device (7), bottom blowing or side-blown coaloust-oxygen gun (8), direct steelmaking stove tap hole (9) and direct steelmaking stove slag notch (10) on the direct steelmaking stove (6); Reduction circulating fluidized bed (5) links to each other with direct steelmaking stove (6) by fine ore blowing device (7) eventually, and fine ore blowing device (7) is inserted in the molten steel district of direct steelmaking stove (6); The direct steelmaking furnace bottom blows or the coaloust-oxygen gun that blows side (8) is inserted in the bottom or lateral molten steel district of direct steelmaking stove (6), direct steelmaking stove slag notch (10) is positioned at furnace wall middle part, the direct steelmaking stove outside, has direct steelmaking stove tap hole (9) on the furnace wall of the direct steelmaking stove outside.
8. direct steelmaking equipment as claimed in claim 7 is characterized in that, described direct steelmaking equipment also comprises ore grinding powder equipment (1), fine ore lift technique (2), and ore grinding powder equipment (1) links to each other with multistage cyclone preheater (3) through fine ore lift technique (2).
9. direct steelmaking equipment as claimed in claim 7 is characterized in that, described direct steelmaking equipment also comprises gas heat exchanger, gas boosting equipment (12), gas purifying equipment (15), gas removal CO
2And H
2O equipment (17), the position is between interchanger and the outlet of direct steelmaking furnace gases.
The reducing gas that the direct steelmaking stove produces flows through reduction circulating fluidized bed (5), prereduction circulating fluidized bed (4), cyclone preheater (3) eventually successively; Pass through gas purifying equipment (15), gas heat exchanger (16) and gas removal CO then successively
2And H
2The gas that O equipment (17) and direct steelmaking stove come out mixes does reducing gas, enters reduction circulating fluidized bed eventually.
10. direct steelmaking equipment as claimed in claim 7 is characterized in that, described direct steelmaking stove tap hole is siphon tapping mouth (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242934 CN101906501A (en) | 2010-08-03 | 2010-08-03 | Direct steelmaking process by using fine ores, coal and oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242934 CN101906501A (en) | 2010-08-03 | 2010-08-03 | Direct steelmaking process by using fine ores, coal and oxygen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101906501A true CN101906501A (en) | 2010-12-08 |
Family
ID=43262085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010242934 Pending CN101906501A (en) | 2010-08-03 | 2010-08-03 | Direct steelmaking process by using fine ores, coal and oxygen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101906501A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443668A (en) * | 2011-11-28 | 2012-05-09 | 莱芜钢铁集团有限公司 | Method and equipment for producing steel |
| CN102703635A (en) * | 2012-07-02 | 2012-10-03 | 昆明理工大学 | Direct reduction ironmaking method by electric furnace |
| CN103060505A (en) * | 2013-01-09 | 2013-04-24 | 莱芜钢铁集团有限公司 | Equipment for directly making steel by using fine ore and coal oxygen |
| CN105648134A (en) * | 2016-03-11 | 2016-06-08 | 太原理工大学 | Gas base and coal base co-reduction iron ore powder method |
| CN106766683A (en) * | 2016-12-29 | 2017-05-31 | 安徽今朝环保科技有限公司 | A kind of floated abraum salt annealing device |
| CN107299177A (en) * | 2017-05-25 | 2017-10-27 | 北京大学 | A kind of reduction of iron ore fines device and method of fluid structurecoupling |
| CN107760809A (en) * | 2017-09-21 | 2018-03-06 | 江苏省冶金设计院有限公司 | A kind of ore smelting device and its smelting process |
| CN108220519A (en) * | 2016-12-22 | 2018-06-29 | 株式会社Posco | Molten iron manufacturing device and process for producing molten iron |
| CN113789420A (en) * | 2021-08-10 | 2021-12-14 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and use method |
| CN114561504A (en) * | 2022-04-28 | 2022-05-31 | 中国恩菲工程技术有限公司 | Melting device and melting method based on fluidization prereduction |
| CN114729406A (en) * | 2019-11-29 | 2022-07-08 | 杰富意钢铁株式会社 | Method for operating a blast furnace and associated installation |
| CN114846159A (en) * | 2020-01-23 | 2022-08-02 | 杰富意钢铁株式会社 | Method for operating a blast furnace and associated installation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166861A (en) * | 1995-10-10 | 1997-12-03 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Method of producing molten crude iron or molten crude steel, and plant for carrying out the method |
| CN101519707A (en) * | 2008-02-28 | 2009-09-02 | 宝山钢铁股份有限公司 | Hematite prereduction process and multistage fluidized bed thereby |
-
2010
- 2010-08-03 CN CN 201010242934 patent/CN101906501A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166861A (en) * | 1995-10-10 | 1997-12-03 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Method of producing molten crude iron or molten crude steel, and plant for carrying out the method |
| CN101519707A (en) * | 2008-02-28 | 2009-09-02 | 宝山钢铁股份有限公司 | Hematite prereduction process and multistage fluidized bed thereby |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443668A (en) * | 2011-11-28 | 2012-05-09 | 莱芜钢铁集团有限公司 | Method and equipment for producing steel |
| CN102703635A (en) * | 2012-07-02 | 2012-10-03 | 昆明理工大学 | Direct reduction ironmaking method by electric furnace |
| CN103060505A (en) * | 2013-01-09 | 2013-04-24 | 莱芜钢铁集团有限公司 | Equipment for directly making steel by using fine ore and coal oxygen |
| CN105648134A (en) * | 2016-03-11 | 2016-06-08 | 太原理工大学 | Gas base and coal base co-reduction iron ore powder method |
| CN105648134B (en) * | 2016-03-11 | 2017-08-15 | 太原理工大学 | A kind of method of gas base and coal base coreduction Iron Ore Powder |
| CN108220519A (en) * | 2016-12-22 | 2018-06-29 | 株式会社Posco | Molten iron manufacturing device and process for producing molten iron |
| CN115261541A (en) * | 2016-12-22 | 2022-11-01 | 株式会社Posco | Molten iron manufacturing apparatus and molten iron manufacturing method |
| CN106766683A (en) * | 2016-12-29 | 2017-05-31 | 安徽今朝环保科技有限公司 | A kind of floated abraum salt annealing device |
| CN107299177A (en) * | 2017-05-25 | 2017-10-27 | 北京大学 | A kind of reduction of iron ore fines device and method of fluid structurecoupling |
| CN107760809A (en) * | 2017-09-21 | 2018-03-06 | 江苏省冶金设计院有限公司 | A kind of ore smelting device and its smelting process |
| CN114729406A (en) * | 2019-11-29 | 2022-07-08 | 杰富意钢铁株式会社 | Method for operating a blast furnace and associated installation |
| CN114846159A (en) * | 2020-01-23 | 2022-08-02 | 杰富意钢铁株式会社 | Method for operating a blast furnace and associated installation |
| CN113789420A (en) * | 2021-08-10 | 2021-12-14 | 赵晓 | Direct steelmaking device for iron-containing powder in reducing atmosphere and use method |
| WO2023015752A1 (en) * | 2021-08-10 | 2023-02-16 | 赵晓 | Iron-containing powder direct steelmaking device in reducing atmosphere and method for using same |
| CN114561504A (en) * | 2022-04-28 | 2022-05-31 | 中国恩菲工程技术有限公司 | Melting device and melting method based on fluidization prereduction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101906501A (en) | Direct steelmaking process by using fine ores, coal and oxygen | |
| CN110423854B (en) | Electric energy full-hydrogen flash reduction direct steelmaking system and process | |
| CN101775451B (en) | Blast-furnace smelting method for vanadium titano-magnetite | |
| CN104212930B (en) | A kind of BAOSHEREX iron-smelting process of two-step smelting molten iron | |
| US6986800B2 (en) | Method and apparatus for improved use of primary energy sources in integrated steel plants | |
| CN101445848B (en) | Process and device for continuous steelmaking from ferriferous material | |
| CN101665848B (en) | Direct steel making process for iron ore | |
| CN108374067B (en) | A kind of device and method of reduction direct steelmaking at full speed | |
| CN101386897B (en) | Iron-smelting technology of SDRF furnace | |
| CN101684507B (en) | Direct steel making technique by reducing iron ore with gas | |
| CN210215430U (en) | Zero-carbon-emission steelmaking equipment | |
| CN101935732B (en) | Charging method of reducing coal gas for gas-based reduction shaft furnace | |
| CN101665849B (en) | Continuous steel making process for iron ore | |
| CN105838838B (en) | Method for preparing pure steel by coal gas direct reduction one-step method | |
| CN112410494B (en) | Iron-making device and method capable of applying suspension melting reduction of fine-grained fine ores | |
| WO2021035821A1 (en) | Cyclone flashing-speed reduction direct steelmaking system and process | |
| CN101260448A (en) | Fusion reduction iron-smelting method for directly using concentrate powder | |
| CN105219907A (en) | The iron-smelting process of high-phosphor oolitic hematite gas base directly reducing-mill ore magnetic selection | |
| CN114672602B (en) | Method for smelting vanadium titanium ore by coke oven gas-based shaft furnace and smelting vanadium titanium ore by electric furnace in deep reduction mode | |
| CN101696460B (en) | Process and device for dual continuous steel making with iron-containing material rotary hearth furnace | |
| CN102443668A (en) | Method and equipment for producing steel | |
| CN201351168Y (en) | Iron-contained material continuous steelmaking device | |
| CN101956038B (en) | Process method and device for performing lower-carbon ironmaking and steelmaking through melting reduction of iron ore | |
| CN101956035B (en) | Iron-containing material slag bath smelting reduction steelmaking technical method and device | |
| CN102127610B (en) | Ironmaking equipment and process for direct smelting reduction of iron ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101208 |