CN103451344A - CEO compound smelting reduction ironmaking plant and technology - Google Patents
CEO compound smelting reduction ironmaking plant and technology Download PDFInfo
- Publication number
- CN103451344A CN103451344A CN2013103924897A CN201310392489A CN103451344A CN 103451344 A CN103451344 A CN 103451344A CN 2013103924897 A CN2013103924897 A CN 2013103924897A CN 201310392489 A CN201310392489 A CN 201310392489A CN 103451344 A CN103451344 A CN 103451344A
- Authority
- CN
- China
- Prior art keywords
- furnace
- reduction
- temperature
- iron
- electric arc
- 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.)
- Granted
Links
Images
Abstract
The invention relates to a CEO compound smelting reduction ironmaking plant and technology. The CEO compound smelting reduction ironmaking plant comprises combination of a vertical furnace, a pre-reduction furnace, an electric furnace, and a cyclone furnace which is arranged on the lateral wall of the electric furnace, wherein an outlet of the vertical furnace is directly connected with an inlet of the pre-reduction furnace; the pre-reduction furnace is connected with the electric furnace through a pipeline; the cyclone furnace is connected with the electric furnace through a pipeline. The technology comprises the following processes: firstly, preparing phi 10-40mm of carbon-containing pellets from iron ore powder, pulverized coal, lime and a binder; drying the carbon-containing pellets by using flue gas of 160-500 DEG C inside the vertical furnace and then feeding the dried carbon-containing pellets to the pre-reduction furnace connected with the vertical furnace; carrying out pre-reduction at the temperature of 300-1450 DEG C of the flue gas discharged from the inside of the electric furnace, and feeding the pre-reduced carbon-containing pellets to the electric furnace; and carrying out reduction and smelting separation at the temperature of 1500-1800 DEG C, wherein the cyclone furnace supplies a high-temperature gas of about 1000-1500 DEG C to the electric furnace by taking coal, air and oxygen as raw materials. The process disclosed by the invention has the characteristics of high energy efficiency, and high recovery rate of iron; kinds of coals and iron ores are used.
Description
technical field:
The invention belongs to fused reduction iron-smelting equipment and technique, be specifically related to the compound fused reduction iron-smelting device of a kind of CEO and technique thereof.
background technology:
Blast furnace iron-making process, through the development of last 100 years, has reached quite perfect stage.But the defect that its Production Flow Chart has it to be difficult to overcome, be at first iron ore raw material and the high grade coke that blast furnace need of production grade is higher, next sintering and coke making process that coordinates that blast furnace production is carried out is the high pollution flow process.In order to overcome the variety of problems of blast furnace ironmaking, people have researched and developed multiple non-blast furnace ironmaking method, and they have saved sintering and coking process.At present press the product form difference, non-blast furnace ironmaking is divided into direct-reduction and two kinds of modes of melting and reducing.
Direct reduction iron making technique is one of main method of non-blast furnace ironmaking, and it is to take geseous fuel, liquid fuel or mill coal as the energy and reductive agent, in the infusible situation of iron ore, is reduced the method that obtains solid state reduction iron.Direct Reducing Iron Process is divided into again the reduction of gas base and coal base reduction.The gas base directly reducing method dominates in direct reduction iron making technique, but because the method is subject to the restriction of regional condition and material condition, develop very uneven, it only is suitable for the place that natural gas source is comparatively sufficient and utilizes high-grade iron ore to be reduced, and take the direct reduction iron making that cheap mill coal is main reductive agent, can effectively avoid this regional limits.The coal base reduction method be take rotary kiln as main, but a lot of problems are also arranged, and at first the ring formation problem is all perplexing the development of this technique all the time, and efficiency is low in addition, and reduction rate is slow, and energy consumption is also higher, and this has all limited further developing of this technique.
Fused reduction iron-smelting is one of technology of modern Iron industry forefront, also in the development phase.Ripe method has the FINEX of COREX method, Korea S POSCO Co., Ltd. all to enter and commercially produce at present, and all the other method and technologies are not yet ripe.In two kinds of relatively ripe methods, the smelting cost of COREX method can't be compared with blast furnace at present, therefore promotes and is restricted; And, in the FINEX method of POSCO Co., Ltd., in the situation of ton iron with coal 1000Kg, also need to use pure oxygen 500Nm
3above, this just needs supporting one (to annotate: be generally 50 Nm by the oxygen-consumption of molten iron-steelmaking than the oxyen manutactory of large 10 times of identical steel-making production scale
3/ ton steel), for a medium scale iron and steel enterprise that produces 5000000 tons of iron and steel per year, calculated according to 8000 hours activity durations in year, per hour 625 tons of steel and iron, it be 31250 Nm that steel-making needs supporting oxygen unit
3/ h, and general oxygen unit 6000 Nm
3the investment of/h is 3,000 ten thousand yuans, with the investment of the supporting oxygen of steel-making be 1.6 hundred million left and right Renminbi, and if use the FINEX method of POSCO Co., Ltd.'s exploitation, need the investment of 1,600,000,000 Renminbi with the supporting oxygen of ironmaking.This is a very large numeral, if this Investment calculation is entered, can the FINEX method of POSCO Co., Ltd. compete with blast furnace process in the investment of ironmaking, also needs research.In addition, from the angle of energy conversion, each conversion has certain utilization ratio.Oxygen is that electricity consumption makes, and the efficiency of electricity consumption oxygen is also just arranged.Electricity that can be used oxygen directly uses in the flow process of direct-reduction, so not only can save oxygen investment, also may save the loss that the energy conversion of electricity consumption oxygen link causes.If consider the reasonable utilization of the energy and investment, replace oxygen with the part electricity, also than the full oxygen reduce cost of using.
The present invention is directed to the relative merits of existing iron-smelting process and the practical situation of China's Energy resources, develop a kind of shaft furnace, pre-reducing furnace, three equipment couplings of electric arc furnace, without coke and make the energy obtain efficient and rational utilization, investment significantly reduces a kind of three-step approach ironmaking technique of fusion and reduction with coal, part electric weight and a small amount of oxygen.
Be below published melting and reducing iron related invention patent:
[should equality application number: 200710148673.1] discloses a kind of molten stove iron smelting method technological process of dividing of coal base reduction metallized pellet, comprise by powdered iron ore, coal dust and caking agent be mixed in proportion, pressure ball, oven dry and become the step of metallized pellet through rotary hearth furnace melting reduction, and the thermometal pellet of solid phase is packed into and melted the step that minute stove carries out whole reduction, be also a kind of two step method deoxy iron-smelting technique.This technique is characterised in that a molten minute stove consists of shaft furnace and forehearth, forehearth is combustion chamber, by two natural gas combustion nozzles tangentially, spray Sweet natural gas in combustion chamber, mesopore by burner will be heated to the oxygen-rich air that the oxygen level of 1000 ℃ is 30% and spray into combustion-supporting, make the temperature of combustion chamber reach 1800～2000 ℃, high temperature hot gas is entered in shaft furnace by combustion chamber, continue the heating pelletizing, make it finally to be reduced into liquid pig iron, slag iron separates, and molten iron enters iron ladle and/or pig-casting machine is cast plate iron, and the slag of sub-department enters in slag ladle.The high-temperature flue gas that rotary hearth furnace and molten minute fire grate are put is 1100 ℃, and a part is dried pelletizing to stoving oven, and rest part is utilized after entering waste heat boiler.
[Qin Ting is permitted application number: 201010204541.8] discloses a kind of method and apparatus of rotary hearth furnace heat supply, the fume afterheat that the method utilizes rotary hearth furnace self to produce, first through after-burner, be warming up to 1300 ℃, introduce respectively again pebble stove and the fire-tube type rotary dryer be connected in parallel, pebble stove by mutual linking, the co-ordination of the combination such as hot tube heat exchanger and fire-tube type rotary dryer residual heat using device, two preheatings and the classification heat exchange of producer gas fuel and combustion air have been realized, guarantee rotary hearth furnace burner place burned flame temperature >=2200 ℃, when high temperature reduction is achieved, realized the drying treatment of powdered iron ore.
[Wan Tianji etc. 200510104882.7] disclose a kind of fuse reducing iron-smelting process for rotating furnace, and this technique is a kind of two step method ironmaking technique of fusion and reduction that autoreduction pelletizing that powdered iron ore and coal dust be mixed is raw material of take.The first step is with the reduction of rotary hearth furnace To Implement Pre, thus the metallized pellet of acquisition degree of metalization>80%, and second step metallized pellet hot charging enters the melting Gas-making Furnace, realize that reduction separates with slag iron eventually, obtain liquid iron, produce coal gas simultaneously, as self hotblast stove and rotary hearth furnace combustion gas use.The maximum characteristics of this technique are the comprehensive utilizations of the energy, and his rotary hearth furnace prereduction process does not need outer for fuel, are that the byproduct coal gas that utilizes the melting Gas-making Furnace to produce is fuel fully.
[application number such as Dong Jie: 200910015461.5] discloses a kind of dual continuous steel making with iron-containing material rotary hearth furnace processing method and device, this technique is a kind of technique of by ferrous material rotary hearth furnace duplex, producing continuously molten steel, be pre-formed molten bath in smelting furnace, ejection carbonaceous material and oxygen, form foamy slag, ferrous material becomes degree of metalization 90～97% by rotary hearth furnace reduction, the ferrous material that temperature is 900～1200 ℃, join in smelting furnace and be melted reduction by the high temperature charging system, add the flux slag making simultaneously in smelting furnace, to molten steel desulfurizing, dephosphorization, be blown into high-temperature oxygen or the oxygen-rich air of 1200～1250 ℃, the CO produced with smelting furnace burns, the high temperature that burning produces reaches the top of the slag, accelerate the fusing of ferrous material and flux, and use the argon gas rifle to be blown into rare gas element in the smelting furnace molten bath, the agitation molten pool molten steel, be blown into oxygen by smelting furnace BOTTOM OXYGEN gas permeable brick to the smelting furnace molten bath, molten steel is carried out to decarburization, promote liquid steel temperature and agitation molten pool.Molten steel continuously flows into the oxygen blast stove by siphon port, and adds a small amount of flux to the interior slag making desulfurization of oxygen blast stove, dephosphorization, with the insert oxygen gun blowing, further adjusts C content and the temperature in molten steel, to obtain molten steel, directly supplies LF or RH refining furnace.
Because blast-furnace smelting exists the problems such as harsh to ingredient requirement, that energy consumption is higher and environmental pollution is serious, actively develop the research work of non-blast furnace ironmaking aspect, the iron smelting method that searching can substitute blast furnace is the direction of countries in the world effort always in recent years.These methods mainly concentrate on direct reduction iron making and two aspects of fused reduction iron-smelting, and existing many technique puts into production or plans and puts into production at present.
Summary of the invention
In order to address the above problem, the purpose of this invention is to provide a kind of processing unit and comprise the shaft furnace for pelletizing feed preheating, drying and dehydrating, the pre-reducing furnace that pelletizing feed is carried out to prereduction reaches CEO compound fused reduction iron-smelting device and the technique thereof molten for slag iron.
Technical scheme of the present invention is the compound fused reduction iron-smelting device of a kind of CEO, and this device comprises that induced draft fan, shaft furnace, reduction furnace, electric arc furnace and some cyclone furnaces form.
Wherein, described reduction furnace is straight way type reduction furnace, in described body of heater, is provided with chain device; Described induced draft fan is connected with an end of described shaft furnace by pipeline one, the discharge port of described shaft furnace bottom is connected with the opening for feed of described reduction furnace by pipeline two, the discharge port of described reduction furnace is connected with the opening for feed of described electric arc furnace by pipeline five, and described cyclone furnace is connected with described electric arc furnace by pipeline six; Described induced draft fan is connected with the opening for feed of described shaft furnace, for the high-temperature flue gas by described electric arc furnace, is incorporated into successively in straight way type reduction furnace and shaft furnace.
Further, described pipeline six is the pipeline of water-cooled steel pipe inner lining refractory.
Another object of the present invention is to provide the technique that the compound fused reduction iron-smelting device of above-mentioned CEO is reduced, and specifically comprises the following steps:
At first, add according to a certain percentage mixer mixing process to add 8～14% water of total amount raw material, then be pressed into diameter
the pelletizing of 10～40mm;
Secondly, open cyclone furnace, electric arc furnace and induced draft fan, described cyclone furnace coal dust and air are raw material, take flow as 100 ~ 1800Nm
3/ tFe, the high-temperature gas that is 1000～1500 ℃ by temperature is blown in described electric arc furnace, described electric arc furnace is interior under the acting in conjunction of described high-temperature gas and electrode, in stove, temperature is 1500-1800 ℃, the induced draft fan that is installed on described shaft furnace opening for feed is incorporated into the high-temperature flue gas of discharging in described electric arc furnace in straight way type reduction furnace and shaft furnace successively, respectively straight way type reduction furnace is heated to 300～1450 ℃, temperature in shaft furnace is heated to 160～500 ℃ from top to bottom, the pelletizing batch mixing that above-mentioned steps 1 is suppressed is sent in described shaft furnace, dehydration is dried in the process that described pelletizing batch mixing falls in described shaft furnace, wherein, in described cyclone furnace, consumption of coal is 300～500kg/tFe, described electric furnace electrode is Graphite Electrodes or self baking electrode, and current consumption is 100～1000kwh/tFe.
Dried pelletizing is imported in described straight way type pre-reducing furnace, pelletizing is the speed operation with 1～20m/min with the furnace bottom chain device, be 300～1450 ℃ in temperature and carry out prereduction, make pelletizing batch mixing degree of metalization reach 20～90%, after prereduction finishes, the temperature of pelletizing is 600～1450 ℃, and direct heat is packed in the electric arc furnace be connected with described reduction furnace, is 1500～1800 ℃ in temperature and is reduced-melt and divide, and finally forming liquid molten iron, the rate of recovery of iron reaches 98%.
Principle of the present invention is:
Shaft furnace is for the carbonaceous pelletizing drying and dehydrating, and the outlet of shaft furnace ball material is connected with the pre-reducing furnace ingress, pelletizing is passed through dehydrate preheating directly to enter pre-reducing furnace and carries out prereduction; Pre-reducing furnace is equivalent to, through the transformation rotary hearth furnace, be about to round rotary hearth furnace and change the straight way type into, although floor space has increased slightly, the investment of mechanical part can greatly reduce; Furnace bottom is chain-belt type structure transport unit easily.Pelletizing is from the pre-reducing furnace exit direct heat electric furnace of packing into after prereduction, and the electric furnace entrance is connected with the pre-reducing furnace outlet; Pelletizing is reduced-melts in electric furnace to be divided.Electric furnace is by electrode power supply, and electrode can be with Graphite Electrodes also available self baking electrode; For alleviating electric energy pressure, with cyclone furnace, for electric furnace, provide the high-temperature gas heat supply; Cyclone furnace is arranged on the electric furnace sidewall, and cyclone furnace is with air (or oxygen-rich air) by the burning of coal dust, and the pipeline by water-cooled steel pipe inner lining refractory provides the high-temperature gas heat supply for electric furnace.
Owing to the objective of the invention is to optimize also Utilization of Coal, electricity, three kinds of energy of oxygen, therefore shaft furnace, pre-reducing furnace all carry out heat supply by remaining high-temperature residual heat in electric furnace, high-temperature gas is produced and is supplied with electric furnace by cyclone furnace, waste heat gas is carried through straight way type pre-reducing furnace by pipeline, pass through again shaft furnace, the flue-gas temperature of shaft furnace is by how many adjusting that adds of its pelletizing, all the time be controlled at 160 ℃, this reaches maximization with regard to the utilising efficiency that makes the energy, also optimized the structure of the energy, reduce the oxygen investment, reached the comprehensive utilization of the energy.Both solve shaft furnace, pre-reducing furnace for heat problem, also for the high-temperature residual heat discharge, found outlet simultaneously.
The present invention has following characteristics aspect the optimization of the energy and comprehensive utilization:
1, be the increase with the scale of investment produced with oxygen of steel making working procedure of 10 times of the direct reduction iron making flow processs of avoiding current maturation, oxygen, electric energy used is directly used in molten minute, can save the oxygen investment, also can save the energy conversion loss of electricity consumption oxygen link.
2, the sidewall locations configuration 1-4 platform that is positioned at electric furnace has been used ripe coal-fired cyclone stove in electricity power enterprise, for electric furnace provides the high-temperature gas of 1000～1500 ℃, to obtain the consumption of part electric energy in electric furnace, the high-temperature flue gas that the energy in molten minute furnace device is provided by electric energy and coal-fired cyclone stove provides jointly.Cyclone furnace is equivalent to the hotblast stove of blast furnace, according to the temperature to the molten minute needed high-temperature gas of stove of electric furnace, at fire coal in required air with addition of a certain amount of oxygen.
3, the high-temperature gas more than needed of molten minute furnace device all enters pre-reducing furnace, for the pelletizing feed in pre-reducing furnace provides the highest approximately temperature of 1400 ℃, to meet the prereduction process of pelletizing feed.
4, after the pre-reducing furnace reduction, the temperature of remaining high-temperature gas at least contains more than 400 ℃, and this portion of energy continues to offer shaft furnace, in order to the pelletizing in drying, preheating shaft furnace.In shaft furnace, flue-gas temperature is 160～500 ℃.The add-on of the pelletizing by the shaft furnace top is regulated, and makes shaft furnace top gas exit temperature be not less than all the time the dew point of 160 ℃, thereby makes the utilization ratio of the heat of whole system reach maximization.
The high-temperature gas that the required energy of the preheating of pelletizing feed of the present invention and prereduction is produced by molten minute furnace device fully provides, without any need for extra fuel, because the portion of energy that melts minute electric furnace is that the high-temperature gas produced through the coal-fired cyclone stove replaces, so power consumption is less, the scope of application of technique own is wider.
Advantage of the present invention is:
1, the pelletizing degree of metalization that pelletizing feed obtains after pre-reducing furnace prereduction is high, has greatly alleviated the molten minute electric furnace pressure of reduction eventually, has accelerated the sepn process of slag iron, has also extended the work-ing life of molten minute resistant material of electric furnace.
2, take coal fully as reductive agent, meet the trend of current Iron industry development.
3, install the coal-fired cyclone furnace apparatus additional on molten minute electric furnace and provide portion of energy for electric furnace, greatly reduce the consumption of electric furnace electric energy, because cyclone furnace is connected to the electric furnace outside, the ash content of coal dust can not be brought in electric furnace simultaneously, reduce the quantity of slag in molten minute electric furnace, alleviated the burden of molten minute process.
4, preheating shaft furnace, pre-reducing furnace, molten minute electric furnace through effectively being connected, when reasonable, effectively optimizing utilize coal, electricity, three kinds of energy of oxygen, are brought into play the function of whole deoxy iron-smelting equipment with cyclone furnace substantially.Moreover coal, electricity, three kinds of energy of oxygen also can be according to the ironmaking motor-driven configurations in region, enterprise place, local coal few or transport inconvenient the other side can multiplex electricity; The ground of the aboundresources of coal, price cheapness can multiplex coal; The place that Sweet natural gas is abundant, the fire coal of cyclone furnace can replace with Sweet natural gas.
5, slag iron good separating effect, wherein the yield of iron can reach 98%.
The accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
The structural representation that Fig. 2 is device of the present invention.
In figure:
1, shaft furnace; 2, pre-reducing furnace; 3, electric arc furnace; 4, pipeline four; 5, chain device; 6, electric furnace cover; 7, electrode; 8, refractory masses in electric furnace; 9, molten iron; 10, slag; 11, cyclone furnace; 12, iron, slag outlet; 13, pelletizing; 14, induced draft fan; 15, pipeline three.
Embodiment
below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described further.
As shown in Figure 2, the compound fused reduction iron-smelting device of a kind of CEO of the present invention, this device comprises that induced draft fan, shaft furnace, reduction furnace, electric arc furnace and some cyclone furnaces form, described reduction furnace is straight way type reduction furnace, in described body of heater, is provided with chain device; Described induced draft fan is connected with an end of described shaft furnace by pipeline one, the discharge port of described shaft furnace bottom is connected with the opening for feed of described reduction furnace by pipeline two, the discharge port of described reduction furnace is connected with the opening for feed of described electric arc furnace by pipeline five, and described cyclone furnace is connected with described electric arc furnace by pipeline six; Described induced draft fan is connected with the opening for feed of described shaft furnace, for the high-temperature flue gas by described electric arc furnace, is incorporated into successively in straight way type reduction furnace and shaft furnace.
Embodiment 1:
By 72%(weight, lower with) sea sand ilmenite powder (all iron content 52-56%, TiO
26-8%, other elements are slightly), 16% coal dust (ash 20-25%, sulphur 0.65-0.75%), 9% lime (containing more than CaO90%), 3% caking agent mixes and adds pelletizing after suitable quantity of water.
Adopt the direct current electric arc furnace of 200KW, connect the pre-reducing furnace of the bottom linked transmission of 4 meters long on electric arc furnace top, another of pre-reducing furnace section is connected with the shaft furnace of 1 meter high; In the high position of bottom 200mm from electric arc furnace, open the tapping a blast furnace an of Φ 100, cinder hole.When not going out scum, the coal-fired cyclone stove is blown into the hot blast of 1400 degrees centigrade by the cinder hole that taps a blast furnace to electric arc furnace.The Coal-fired capacity of cyclone furnace is 100Kg/h, gives in the air of cyclone furnace air blast and mixes the oxygen that adds 2-4%, and the purity of oxygen is 99%.
By the ball of making, add continuously in shaft furnace, the pelletizing before added after 20 minutes enters pre-reducing furnace, by chain device, pelletizing feed ran to by 30 minutes the high temperature section that is connected with electric furnace from the low-temperature zone of pre-reducing furnace gradually, and the degree of metalization that reducting pellet has reaches 80%.After reducting pellet enters electric furnace, finally reduce and melt minutes approximately 20 minutes, per hour produce pig iron 400Kg, the hot metal composition obtained is Fe:98.56%, C:0.52-0.66 %, S:0.11-0.21%, P:0.01-0.2%, Si:0.025-0.3%, Mn:0.02-0.03%.This has been in fact steel, and just sulphur content exceeds standard.
The raw material consumption of ton steel is: 2 tons of iron ores, the coal of 1100Kg (comprising coal and cyclone furnace coal for reduction), oxygen consumption 200 Nm
3, power consumption 500 degree.
?
Embodiment 2:
Proportion scheme is with case study on implementation 1.
Adopt the direct current electric arc furnace of 400KW, connect the pre-reducing furnace of the bottom linked transmission of 4 meters long on electric arc furnace top, another of pre-reducing furnace section is connected with the shaft furnace of 1 meter high; In the high position of bottom 200mm from electric arc furnace, open the tapping a blast furnace an of Φ 100, cinder hole.
Cyclone furnace is thrown away need not.
By the ball of making, add continuously in shaft furnace, the pelletizing before added after 20 minutes enters pre-reducing furnace, by chain device, pelletizing feed ran to by 30 minutes the high temperature section that is connected with electric furnace from the low-temperature zone of pre-reducing furnace gradually, and the degree of metalization that reducting pellet has reaches 40%.After reducting pellet enters electric furnace, finally reduce and melt minutes approximately 20 minutes, per hour producing pig iron 400Kg.
The hot metal composition obtained is with case study on implementation 1.
The raw material consumption of ton steel is: 2 tons of iron ores, the coal of 320Kg (reduction coal), power consumption 1000 degree.
Claims (3)
1. the compound fused reduction iron-smelting device of CEO, this device comprises that induced draft fan (14), shaft furnace (1), reduction furnace (2), electric arc furnace (3) and some cyclone furnaces (11) stove form, it is characterized in that, described reduction furnace (2) is straight way type reduction furnace, is provided with chain device (5) in the body of heater of described reduction furnace (2); Described induced draft fan (14) is connected with an end of described shaft furnace (1) by pipeline, the discharge port of described shaft furnace (1) bottom is connected with the opening for feed of described reduction furnace (2), the discharge port of described reduction furnace (2) is connected with the opening for feed of described electric arc furnace (3) by pipeline three (15), described cyclone furnace (11) is arranged on described electric arc furnace (3) one sides, the UNICOM by pipeline four (4) with described electric arc furnace (3).
2. the compound fused reduction iron-smelting device of CEO according to claim 1, is characterized in that, the pipeline that described pipeline three (15) is water-cooled steel pipe inner lining refractory.
3. the technique that the compound fused reduction iron-smelting device of CEO according to claim 1 and 2 is reduced, is characterized in that, specifically comprises the following steps:
At first, add according to a certain percentage mixer mixing process to add 8～14% water of total amount raw material, then be pressed into diameter
the pelletizing of 10～40mm;
Secondly, open cyclone furnace, electric arc furnace and induced draft fan, described cyclone furnace coal dust and air are raw material, take flow as 100 ~ 1800Nm
3/ tFe, the high-temperature gas that is 1000～1500 ℃ by temperature is blown in described electric arc furnace, described electric arc furnace is interior under the acting in conjunction of described high-temperature gas and electrode, in stove, temperature is 1500-1800 ℃, the induced draft fan that is installed on described shaft furnace opening for feed is incorporated into the high-temperature flue gas of discharging in described electric arc furnace in straight way type reduction furnace and shaft furnace successively, respectively straight way type reduction furnace is heated to 300～1450 ℃, temperature in shaft furnace is heated to 160～500 ℃ from top to bottom, the pelletizing batch mixing that above-mentioned steps 1 is suppressed is sent in described shaft furnace, dehydration is dried in the process that described pelletizing batch mixing falls in described shaft furnace, wherein, in described cyclone furnace, consumption of coal is 300～500kg/tFe, mix the oxygen that adds 2-4% in described air, the purity of oxygen is 99%, described arc furnace electrode is Graphite Electrodes or self baking electrode, and current consumption is 100～1000kwh/tFe,
Dried pelletizing is imported in described straight way type pre-reducing furnace, pelletizing is the speed operation with 1～20m/min with the furnace bottom chain device, be 300～1450 ℃ in temperature and carry out prereduction, make pelletizing batch mixing degree of metalization reach 20～90%, after prereduction finishes, the temperature of pelletizing is 600～1450 ℃, and direct heat is packed in the electric arc furnace be connected with described reduction furnace, is 1500～1800 ℃ in temperature and is reduced-melt and divide, and finally forming liquid molten iron, the rate of recovery of iron reaches 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392489.7A CN103451344B (en) | 2013-09-02 | 2013-09-02 | CEO compound smelting reduction ironmaking plant and technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310392489.7A CN103451344B (en) | 2013-09-02 | 2013-09-02 | CEO compound smelting reduction ironmaking plant and technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103451344A true CN103451344A (en) | 2013-12-18 |
| CN103451344B CN103451344B (en) | 2015-04-29 |
Family
ID=49734177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310392489.7A Expired - Fee Related CN103451344B (en) | 2013-09-02 | 2013-09-02 | CEO compound smelting reduction ironmaking plant and technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103451344B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627836A (en) * | 2013-12-20 | 2014-03-12 | 中冶赛迪工程技术股份有限公司 | Steelmaking device and steelmaking method |
| CN105039627A (en) * | 2015-09-24 | 2015-11-11 | 重庆大学 | Coal-based direct reduction-melt separation furnace smelting reduction iron-making process using external heating mode |
| CN107849622A (en) * | 2015-07-23 | 2018-03-27 | 纳荣·利马斯蒂安 | Utilize the method for waste gas from smelting furnace reducing iron oxides pelletizing |
| CN108007201A (en) * | 2017-11-03 | 2018-05-08 | 林福增 | A kind of cast raw material and the energy-saving environment-friendly furnace of coke segregated combustion |
| CN105940120B (en) * | 2013-12-30 | 2019-02-05 | G·A·多罗费夫 | The method and electric arc furnaces of steel processed in electric arc furnaces |
| CN110016532A (en) * | 2018-12-25 | 2019-07-16 | 武汉桂坤科技有限公司 | A kind of carbon and the reduction of natural gas joint and molten point of integrated process for making |
| CN112280972A (en) * | 2020-09-29 | 2021-01-29 | 新疆吉泰低阶煤利用研究有限责任公司 | Process method for preparing metallized hot pellets by waste heat of submerged arc furnace |
| CN112410548A (en) * | 2020-09-29 | 2021-02-26 | 新疆吉泰低阶煤利用研究有限责任公司 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
| CN113897530A (en) * | 2021-09-16 | 2022-01-07 | 北京科技大学 | Process for continuously smelting ferrotitanium alloy |
| CN115354115A (en) * | 2022-10-18 | 2022-11-18 | 北京科技大学 | Ultra-short-flow low-carbon steel-making system based on cold bonded pellets and use method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628091A (en) * | 2011-07-12 | 2012-08-08 | 刘元生 | Technology for producing molten iron by three-step method |
| CN203007299U (en) * | 2013-01-09 | 2013-06-19 | 谢慧清 | Electric arc furnace for metallurgy |
| CN103266194A (en) * | 2013-04-25 | 2013-08-28 | 中冶赛迪工程技术股份有限公司 | Shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device and feeding control method |
-
2013
- 2013-09-02 CN CN201310392489.7A patent/CN103451344B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628091A (en) * | 2011-07-12 | 2012-08-08 | 刘元生 | Technology for producing molten iron by three-step method |
| CN203007299U (en) * | 2013-01-09 | 2013-06-19 | 谢慧清 | Electric arc furnace for metallurgy |
| CN103266194A (en) * | 2013-04-25 | 2013-08-28 | 中冶赛迪工程技术股份有限公司 | Shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device and feeding control method |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627836A (en) * | 2013-12-20 | 2014-03-12 | 中冶赛迪工程技术股份有限公司 | Steelmaking device and steelmaking method |
| CN103627836B (en) * | 2013-12-20 | 2015-09-09 | 中冶赛迪工程技术股份有限公司 | A kind of steel-smelting device and method |
| CN105940120B (en) * | 2013-12-30 | 2019-02-05 | G·A·多罗费夫 | The method and electric arc furnaces of steel processed in electric arc furnaces |
| CN107849622A (en) * | 2015-07-23 | 2018-03-27 | 纳荣·利马斯蒂安 | Utilize the method for waste gas from smelting furnace reducing iron oxides pelletizing |
| CN107849622B (en) * | 2015-07-23 | 2020-07-03 | 纳荣·利马斯蒂安 | Method for reducing iron oxide pellets by utilizing waste gas of smelting furnace |
| CN105039627A (en) * | 2015-09-24 | 2015-11-11 | 重庆大学 | Coal-based direct reduction-melt separation furnace smelting reduction iron-making process using external heating mode |
| CN108007201A (en) * | 2017-11-03 | 2018-05-08 | 林福增 | A kind of cast raw material and the energy-saving environment-friendly furnace of coke segregated combustion |
| CN110016532A (en) * | 2018-12-25 | 2019-07-16 | 武汉桂坤科技有限公司 | A kind of carbon and the reduction of natural gas joint and molten point of integrated process for making |
| CN112280972A (en) * | 2020-09-29 | 2021-01-29 | 新疆吉泰低阶煤利用研究有限责任公司 | Process method for preparing metallized hot pellets by waste heat of submerged arc furnace |
| CN112410548A (en) * | 2020-09-29 | 2021-02-26 | 新疆吉泰低阶煤利用研究有限责任公司 | Process for preparing metallized hot pellets by using waste heat of electric arc furnace |
| CN113897530A (en) * | 2021-09-16 | 2022-01-07 | 北京科技大学 | Process for continuously smelting ferrotitanium alloy |
| CN115354115A (en) * | 2022-10-18 | 2022-11-18 | 北京科技大学 | Ultra-short-flow low-carbon steel-making system based on cold bonded pellets and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103451344B (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103451344B (en) | CEO compound smelting reduction ironmaking plant and technology | |
| CN101445848B (en) | Process and device for continuous steelmaking from ferriferous material | |
| CN105838838B (en) | Method for preparing pure steel by coal gas direct reduction one-step method | |
| CN102409124A (en) | Continued ironmaking device based on melting reduction | |
| CN101538634A (en) | Smelting process and device of pure iron | |
| CN104894322B (en) | The method and its device of a kind of multilayer slag fused reduction iron-smelting | |
| CN102399994A (en) | Titanium slag smelting method | |
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN101538631A (en) | Process and device for smelting ferronickel and nickel-containing molten iron by using lower-nickel materials | |
| CN101665871A (en) | Method for producing titanium carbide slag | |
| CN101265510B (en) | Fusion reduction reaction furnace and fusion smelting method for metal | |
| US10661340B2 (en) | Method and apparatus for producing metallic iron from iron oxide fines | |
| CN103451451A (en) | Ferro-nickel alloy production technology with laterite nickel ore processed through oxygen enrichment hot air shaft furnace | |
| US5431710A (en) | Method for continuously producing iron, steel or semi-steel and energy | |
| CN107299175A (en) | A kind of system and method for fluid bed gas, gas-based reduction and electric furnace steel making coupling | |
| CN106868245A (en) | A kind of molten iron making processes of two-step method | |
| CN101956038B (en) | Process method and device for performing lower-carbon ironmaking and steelmaking through melting reduction of iron ore | |
| CN102409126B (en) | Integrated reduction ironmaking furnace and integrated reduction ironmaking process | |
| CN101956035B (en) | Iron-containing material slag bath smelting reduction steelmaking technical method and device | |
| CN102191348B (en) | Technological method and device for producing high-grade nickel and stainless steel by using oxidized pellet method | |
| CN103352097A (en) | Reducing furnace, and technology for directly reducing coal-containing pellets through preheating outside coal base | |
| CN102127610B (en) | Ironmaking equipment and process for direct smelting reduction of iron ore | |
| CN102181776B (en) | Technique and device for producing high-grade nickel and stainless steel by reduction pelletization | |
| CN100336915C (en) | One and half step melting deacidizing iron-smelting method | |
| KR101607254B1 (en) | Combiner Ironmaking facilities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20210902 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |