CN101935729B - Top loading process for iron-smelting process furnace - Google Patents
Top loading process for iron-smelting process furnace Download PDFInfo
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- CN101935729B CN101935729B CN2010102864467A CN201010286446A CN101935729B CN 101935729 B CN101935729 B CN 101935729B CN 2010102864467 A CN2010102864467 A CN 2010102864467A CN 201010286446 A CN201010286446 A CN 201010286446A CN 101935729 B CN101935729 B CN 101935729B
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Abstract
The invention relates to a top loading process for an iron-smelting process furnace. The iron-smelting process furnace comprises a furnace top loading system of a direct reduction furnace, a furnace top loading system of a melting furnace and a sponge iron conveying system, wherein the furnace top loading system of the direct reduction furnace is arranged in parallel with the furnace top loading system of the melting furnace; the top of the direct reduction furnace is provided with a raw material conveying device for conveying ore, fuel and auxiliary materials to the tops of the direct reduction furnace (1) and the melting furnace (10); after being distributed by a distributing device, the ore is added into the direct reduction furnace (1) through the furnace top loading system of the direct reduction furnace; and the fuel and the auxiliary materials are added into the smelting furnace (10) through the top loading system of the smelting furnace. The overall height of the loading system is reduced and construction is facilitated. Simultaneously, a process for generating the sponge iron by direct reduction is integrally combined with a process for producing molten iron by melting in the method, so that heat loss of hot-state sponge iron in a conveying process is reduced, production efficiency is improved and energy consumption is lowered.
Description
The application be that October 22, application number in 2009 are 200910191175.4 the applying date, denomination of invention divides an application for the application for a patent for invention of " a kind of ironmaking technical furnace top charging technology ".
Technical field
The present invention relates to a kind of ironmaking technical furnace top charging technology.
Background technology
The non-blast furnace ironmaking technology is worldwide extensively promoted as a kind of novel environment friendly iron-smelting process flow process.Raw material generates sponge iron through direct reduction furnace, and sponge iron passes through to get into the molten stove that divides behind e Foerderanlage, the briquetting, generates molten iron.Existing mode is reduction furnace and melts the branch stove for vertically being arranged in order; This mode causes the entire equipment overall height too high; It is inconvenient to construct, and what the sponge iron that simultaneously direct reduction furnace comes out can not be very fast is transported in the molten branch stove, has caused the loss of sponge iron heat.
Summary of the invention
The purpose of this invention is to provide the ironmaking technical furnace top charging technology that a kind of integral device height is low, be convenient to construct.
To achieve these goals, adopt following technical scheme: a kind of ironmaking technical furnace top charging technology, comprise direct reduction furnace top charging system, the molten stove top charging system that divides, the sponge iron delivery system,
Wherein directly reduction furnace top charging system comprises all pressures storehouse, intermediate bunker, the FlexbleJoint that connects successively through pipeline, distributor; The said top in storehouse of all pressing is provided with the top seal valve, and the said bottom in storehouse of all pressing is provided with the material lock, and the top of said intermediate bunker is provided with the lower seal valve, and the bottom of said intermediate bunker is provided with material flow gate;
The wherein molten stove top charging system that divides comprises that the bottom that connects successively through pipeline is provided with the receiver bin of material valve, all presses storehouse, intermediate bunker; The said top in storehouse of all pressing is provided with the top seal valve; The said bottom in storehouse of all pressing is provided with the material lock; The top of said intermediate bunker is provided with the lower seal valve, and the bottom of said intermediate bunker is provided with material flow gate;
It is characterized in that:
Said direct reduction furnace top charging system and said molten minute stove top charging system put side by side; The top of said direct reduction furnace is provided with raw material conveying device; Raw material conveying device is transported to direct reduction furnace and the molten furnace roof portion that divides with ore, fuel and auxiliary material, through behind at least one distribution device
Ore adds ore in the direct reduction furnace through direct reduction furnace top charging system;
Fuel and auxiliary material add molten the branch in the stove through the molten stove top charging system that divides with fuel and auxiliary material.
Said sponge iron delivery system comprises sponge iron is delivered to other technical process sponge iron delivery systems of other technical process and sponge iron is delivered to a molten molten minute stove sponge iron delivery system of dividing the stove furnace roof; Said raw material conveying device is an at least one rotary conveyor, and said distribution device is an oscillating chute.
Said other technical process sponge iron delivery systems comprise trip valve, sending warehouse, turning valve, nozzle and the Pneumatic conveying pipeline that is connected to the sponge iron outlet of direct reduction furnace bottom in turn.
Stove sponge iron delivery system can adopt structure in said molten minute: said molten minute stove sponge iron delivery system comprises the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all presses storehouse, sending warehouse, turning valve, nozzle and Pneumatic conveying pipeline; The Pneumatic conveying pipeline end is connected with material gas separating device, turning valve in turn, concentrates funnel and distributor; The material gas separating device also is connected with pipeline with the molten top of stove of dividing; Stove top charging system was connected to said concentrated funnel through hot blast valve in said molten minute;
Sponge iron gets into turning valve through trip valve, and the discharge velocity of control sponge iron gets into and all presses the storehouse; Get into sending warehouse after all pressing the back and sending warehouse pressure is consistent, through sending warehouse bottom turning valve, successive gets into nozzle; Be transferred medium-gas at the nozzle place and be transported to the molten stove furnace roof material gas separating device that divides through transport pipe, delivering gas separates the back and enters molten the branch in the stove through pipeline, and turning valve starts; Sponge iron is arranged in molten the branch in the stove uniformly through concentrating funnel and distributor.
Stove sponge iron delivery system also can adopt structure in said molten minute: comprise the trip valve, sending warehouse, turning valve, nozzle and the Pneumatic conveying pipeline that are connected to the sponge iron outlet of direct reduction furnace bottom in turn, the end of Pneumatic conveying pipeline be connected with in turn material gas separating device, turning valve, top seal valve, all press storehouse, material flow gate, lower seal valve, concentrate funnel and distributor; Stove top charging system was connected to said concentrated funnel through hot blast valve in said molten minute; Sponge iron gets into sending warehouse through trip valve, gets into nozzle through turning valve, is transferred medium-gas at the nozzle place through pipeline and is transported to the material gas separating device; All press the storehouse to unload to be depressed into and expect that gas separating device pressure is consistent, open upper sealing valve, sponge iron gets into through material gas separating device bottom turning valve and all presses the storehouse; Turning valve stops feed then, and upper sealing valve is closed, and begins inflation and all is depressed into consistent with the molten furnace pressure that divides; Open the lower seal valve; Open material flow gate then, sponge iron gets into concentrates funnel, gets into molten the branch in the stove through distributor.
Stove sponge iron delivery system also can adopt structure in said molten minute: comprise the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all press storehouse, sending warehouse, turning valve, nozzle and Pneumatic conveying pipeline; The Pneumatic conveying pipeline end is connected with divider, and said divider is located at molten upper of furnace body of dividing stove, and sponge iron to divider, is sent into molten the branch in the stove with sponge iron through pipe-line transportation from the molten outlet that divides the stove circumferential direction to be uniformly distributed with.
Stove top charging system was connected to said molten minute furnace roof portion through distributor in said molten minute;
Be provided with the heat insulation and wear resistance resist in the said Pneumatic conveying pipeline, said Pneumatic conveying pipeline is connected with an adapter bonnet at least, and said Pneumatic conveying pipeline is connected with a loop expansion pipe or expansion pipe at least.
Said all the pressure also is connected with equal row pressure system and sack cleaner in turn on the storehouse, when all pressing the storehouse row pressure, gas through equal row pressure system and sack cleaner after, directly the discharging.
The transport of sponge iron temperature is 500 ℃～700 ℃ in the said sponge iron delivery system.
Said distributor is connected with cooling gas through pipeline, and internal pressure is greater than the molten furnace pressure that divides.
Wherein the sponge iron delivery system also can adopt chapelet to carry; Said molten minute stove sponge iron delivery system comprises the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all presses storehouse, turning valve; The below of said turning valve is provided with chapelet; The below of the other end of chapelet is provided with the weigh with bottom material lock, and the below of weigh is provided with successively to have the top seal valve, all press the storehouse, material flow gate, lower seal valve, concentrate funnel and distributor; Stove top charging system was connected to said concentrated funnel through hot blast valve in said molten minute;
Hot sponge iron gets into through turning valve from reduction shaft furnace and all presses the storehouse, enters chapelet through turning valve after all pressing, and rises to weigh, all press the storehouse row pressure after; Open the top seal valve, open weigh bottom material lock then, sponge iron gets into all presses the storehouse; Close the top seal valve, all be depressed into consistent with the molten furnace pressure that divides, unlatching lower seal valve; Open material flow gate then, sponge iron gets into concentrates funnel, gets into molten the branch in the stove through distributor.
Said other technical process sponge iron delivery systems comprise the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all press storehouse, turning valve; The below of said turning valve is provided with chapelet, and sponge iron is delivered to other technical process through chapelet.
Said chapelet is provided with thermofin.
Be connected with rare gas element in the said chapelet.
Beneficial effect of the present invention is: the present invention is arranged side by side with the molten stove that divides with direct reduction furnace, has reduced the height of total system, is convenient to construction.This method will directly be reduced to generate sponge iron technology and melt and divided production molten iron technology to be coupled as one simultaneously, reduce the thermosteresis of hot sponge iron in course of conveying, improve productivity, reduce energy consumption.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1; Fig. 2 is the structural representation of embodiment 2; Fig. 3 is the structural representation of embodiment 3; Fig. 4 is the structural representation of embodiment 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
Embodiment 1: like Fig. 1; Raw material, fuel and auxiliary material are transported to direct reduction furnace 1 and divide stove 10 furnace roofs with molten, through an oscillating chute 26 in batches through a rotary conveyor 5; Raw material is sent into direct reduction furnace 1 top charging system, fuel and auxiliary material are sent into moltenly divided stove 10 top charging systems.
The molten stove top charging system that divides, by horizontal feed belt 37, receiver bin 7 is all pressed storehouse 13; Intermediate bunker 15, equal row pressure system 16, top seal valve 36, material lock 35; Lower seal valve 34, material lock 32, material flow gate 38, FlexbleJoint 51; Hot blast valve 24, material gas separating device 14 is concentrated funnel 12, and distributor 11 is formed.Fuel and auxiliary material get into horizontal feed belt 37 through oscillating chute 26, and fuel and auxiliary material are sent into receiver bin 7, all press storehouse 13 row pressures after; Open top seal valve 36 earlier, open material lock 32 then, fuel and auxiliary material get into and all press in the storehouse 13; Close top seal valve 36, charge into nitrogen and all press, pressure with molten divide stove 10 furnace pressures consistent after; Open lower seal valve 34 earlier, opening material lock 35 then, raw material gets into intermediate bunker 15.When molten branch stove 10 needs to add fuel and auxiliary material, open hot blast valve 24 earlier, open material flow gate 38 then, fuel and auxiliary material pass through to concentrate funnel 12 and distributor 11, are arranged in the stove uniformly.Turning valve 33 is arranged at sponge iron charge gas separating device 14 bottoms, and when needs added sponge iron, turning valve 33 started, and sponge iron is arranged in the stove through concentrating funnel 12 and distributor 11 uniformly.The isolated delivering gas of material gas separating device directly gets into molten the branch in the stove 10 through pipeline 40.
The output of reduction shaft furnace 1 hot sponge iron, the one tunnel is transported to other technical process 25, and another road is transported to molten branch stove 10 furnace roof material gas separating devices 14.Owing to be transported to other technical process 25 place's pressure less than reduction shaft furnace 1 pressure, therefore, sponge iron gets into sending warehouse 39 through trip valve 18, gets into nozzle 23 through turning valve 22, is transferred medium-gas at nozzle 23 places and is transported to other technical process 25.Because the molten stove 10 furnace roof material gas separating devices 14 place's pressure that divide are consistent with molten stove 10 internal pressures of dividing, greater than reduction shaft furnace 1 internal pressure, sponge iron gets into turning valve 19 through trip valve 18; The discharge velocity of control sponge iron; Get into again and all press storehouse 20, get into sending warehouse 21 after all pressing the back and sending warehouse 21 pressure are consistent, through sending warehouse bottom turning valve 22; Successive gets into nozzle 23, is transferred medium-gas at nozzle 23 places and is transported to molten branch stove 10 furnace roof material gas separating devices 14 through transport pipe 8.A whole set of strength transmitting apparatus is a high-temperature sponge iron owing to what send; Its turning valve 22, trip valve 18, all press storehouse 20, sending warehouse 21 enclosure interior that refractory protection is all arranged; Seal valve, turning valve motor element all have water-cooling system to guarantee the normal operation of mechanical mechanism at high temperature.
Transfer lime is formed through flange connection by the steel pipe of the inner matcoveredn of multistage.
Bend pipe is the most serious parts of wearing and tearing in the process of pneumatic transmission; Usually be employed in the turning and form the bank lamination naturally; When sponge iron particle is transported to the turning; Particle hits on the accumulation horizon rather than on the transfer lime resist, and the effective like this wearing and tearing that reduce bend pipe have prolonged work-ing life.
Because pipeline receives the influence of high-temperature sponge iron, causes distortion, therefore on a segment distance, arrange loop expansion pipe and expansion pipe, be out of shape the distortion that causes with extraction duct.
In the process of pneumatic transmission, along with the increase of fed distance, it is big that crushing becomes gradually; Pressure reduces gradually, and gas velocity strengthens gradually, in order to guarantee that delivering gas speed is in a suitable scope; To guarantee transport capacity and to reduce pipe wear; One place's adapter bonnet 9 is set at a certain distance, reduces gas, make it all the time all in a suitable scope in ducted speed.
After sponge iron was delivered to material gas separating device 14, the delivering gas that is separated directly got into molten the branch in the stove 10 through pipeline.Adopt air conveying mode can improve the speed that sponge iron is carried, reduce scattering and disappearing of heat, improved productivity, reduced energy consumption, and environmental protection in the course of conveying, can not produce airborne dust, waste gas can not spread yet.
All in the row pressure system, the body of all calming the anger is a nitrogen.Nitrogen directly enters atmosphere through furnace roof sack cleaner 6 during row pressure.The dust that the device of giving a dinner of welcome on rotary conveyor absorbs collects discharging through this sack cleaner equally.
Embodiment 2: like Fig. 2, the charging of this embodiment raw material, fuel and auxiliary material is consistent with embodiment 1 scheme, and its difference is the conveying of hot sponge iron.
The output of reduction shaft furnace 1 hot sponge iron, the one tunnel is transported to other technical process 25, and another road is transported to molten branch stove 10 furnace roof material gas separating devices 14.The pressure at other technical process 25 and molten branch stove 10 furnace roof material gas separating devices 14 places is all less than the pressure in the reduction shaft furnace 1; Therefore; Sponge iron gets into sending warehouse 39 through trip valve 18; Get into nozzle 23 through turning valve 22, be transferred medium-gas at nozzle 23 places through pipeline 8 and be transported to other technical process 25 and molten branch stove 10 furnace roof material gas separating devices 14.
The molten stove 10 furnace roof material gas separating devices 14 interior pressure that divide divide stove 10 internal pressures less than molten, could add after all pressing hot sponge iron.When filling with substance; All press storehouse 42 to unload to be depressed into and expect that gas separating device 14 pressure are consistent; Open upper sealing valve 41, sponge iron gets into through material gas separating device 14 bottom turning valves 33 and all presses storehouse 42, and turning valve 33 stops feed then; Upper sealing valve 41 is closed, and begins to charge into nitrogen and all is depressed into consistent with molten stove 10 internal pressures of dividing.Open lower seal valve 44, open material flow gate 43 then, sponge iron gets into concentrates funnel 12, gets into molten the branch in the stove 10 through distributor 11.
After delivering gas comes out from the material gas separating device, through recycling after dedusting, cooling, the pressurization.
Embodiment 3: like Fig. 3, the charging of this embodiment raw material, fuel and auxiliary material is consistent with scheme shown in the embodiment 1, and its difference is the conveying of hot sponge iron.
This scheme has been saved molten minute stove furnace roof material gas separating device 14, changes into sponge iron is directly sent into molten the branch in the stove 10.After hot sponge iron is discharged from reduction shaft furnace 1; Its send mode is sent to molten branch stove furnace roof material gas separating device 14 unanimities with scheme shown in Figure 1 with sponge iron; After sponge iron is delivered to divider 45 through pipeline 8, divide several roads pipeline that sponge iron is sent into molten the branch in the stove from the molten outlet that divides stove 10 circumferential directions to be uniformly distributed with.
Embodiment 4: like Fig. 4, the charging of this embodiment raw material, fuel and auxiliary material and the difference of embodiment 1 are the conveying of hot sponge iron.
The hot sponge iron of this scheme is carried and is adopted chapelet.Hot sponge iron gets into through turning valve 49 from reduction shaft furnace 1 and all presses storehouse 48, enters chapelet 46 after all pressing, and in the chapelet 46 thermofin is arranged; And feed the oxidation that nitrogen prevents sponge iron, be transported to the molten stove furnace roof weigh 47 of dividing, all press storehouse 42 row pressures after; Open top seal valve 41, open weigh bottom material lock 50 then, sponge iron gets into all presses storehouse 42; Close top seal valve 41, all be depressed into consistent with the molten furnace pressure that divides, unlatching lower seal valve 44; Open material flow gate 43 then, sponge iron gets into concentrates funnel 12, gets into molten the branch in the stove 10 through distributor 11.
Other technical process sponge iron delivery systems comprise the trip valve 18 that is connected to the 1 bottom sponge iron outlet of direct reduction furnace in turn, turning valve 49, all press storehouse 48, turning valve 22; The below of said turning valve 22 is provided with chapelet 46 ', and sponge iron is delivered to other technical process 25 through chapelet 46 '.
Certainly some equipment among the present invention are done conventional replacement, replace with screw feeder like turning valve, material valve similarly changes, and all drops within protection scope of the present invention.
Claims (5)
1. ironmaking technical furnace top charging technology comprises direct reduction furnace top charging system, a molten stove top charging system, the sponge iron delivery system of dividing;
Wherein directly reduction furnace top charging system comprises through what pipeline connected successively and first all presses storehouse (4), first intermediate bunker (3), FlexbleJoint (31), first distributor (2); Said first all presses the top in storehouse (4) to be provided with the first top seal valve (27); Said first all presses the bottom in storehouse (4) to be provided with the first material lock (28); The top of said first intermediate bunker (3) is provided with the first lower seal valve (29), and the bottom of said first intermediate bunker (3) is provided with first material flow gate (30);
The wherein molten receiver bin (7), second that divides stove top charging system to comprise that the bottom that connects successively through pipeline is provided with the 3rd material valve (32) is all pressed storehouse (13), second intermediate bunker (15); Said second all presses the top in storehouse (13) to be provided with the second top seal valve (36); Said second all presses the bottom in storehouse (13) to be provided with the second material lock (35); The top of said second intermediate bunker (15) is provided with the second lower seal valve (34), and the bottom of said second intermediate bunker (15) is provided with second material flow gate (38);
It is characterized in that:
Said direct reduction furnace top charging system and said molten minute stove top charging system put side by side; The top of said direct reduction furnace is provided with raw material conveying device; Raw material conveying device is transported to direct reduction furnace (1) and molten stove (10) top of dividing with ore, fuel and auxiliary material; Through behind at least one distribution device
Ore adds ore in the direct reduction furnace (1) through direct reduction furnace top charging system;
Fuel and auxiliary material add molten the branch in the stove (10) through the molten stove top charging system that divides with fuel and auxiliary material;
Said sponge iron delivery system comprises sponge iron is delivered to other technical process sponge iron delivery systems of other technical process (25) and sponge iron is delivered to a molten molten minute stove sponge iron delivery system of dividing stove (10) furnace roof; Said raw material conveying device is at least one rotary conveyor (5), and said distribution device is oscillating chute (26);
Said molten minute stove sponge iron delivery system comprises that the trip valve (18), second turning valve (49), the 4th that are connected to the sponge iron outlet of direct reduction furnace (1) bottom in turn all press storehouse (48), first turning valve (22); The below of said first turning valve (22) is provided with first chapelet (46); The below of the other end of first chapelet (46) is provided with the weigh (47) with bottom material lock (50), and the below of weigh (47) is provided with successively to have the 3rd top seal valve (41), the 3rd and all press storehouse (42), the 3rd material flow gate (43), the 3rd lower seal valve (44), concentrate funnel (12) and second distributor (11);
Stove top charging system was connected to said concentrated funnel (12) through hot blast valve (24) in said molten minute;
Hot sponge iron gets into the 4th from direct reduction furnace (1) through second turning valve (49) and all presses storehouse (48); Enter first chapelet (46) through first turning valve (22) after all pressing, rise to weigh (47), the 3rd all press storehouse (42) row pressure after; Open the 3rd top seal valve (41); Open weigh bottom material lock (50) then, sponge iron gets into the 3rd and all presses storehouse (42), closes the 3rd top seal valve (41) and all is depressed into consistent with the molten furnace pressure that divides; Open the 3rd lower seal valve (44); Open the 3rd material flow gate (43) then, sponge iron gets into concentrates funnel (12), gets into molten the branch in the stove (10) through second distributor (11).
2. ironmaking technical furnace top charging technology as claimed in claim 1; It is characterized in that: said other technical process sponge iron delivery systems comprise that the trip valve (18), second turning valve (49), the 4th that are connected to the sponge iron outlet of direct reduction furnace (1) bottom in turn all press storehouse (48), first turning valve (22); The below of said first turning valve (22) is provided with second chapelet (46 '), and sponge iron is delivered to other technical process (25) through second chapelet (46 ').
3. ironmaking technical furnace top charging technology as claimed in claim 2 is characterized in that: said second chapelet (46 ') is provided with thermofin.
4. ironmaking technical furnace top charging technology as claimed in claim 3 is characterized in that: be connected with rare gas element in said second chapelet (46 ').
5. ironmaking technical furnace top charging technology as claimed in claim 4 is characterized in that: said second distributor (11) is connected with cooling gas through pipeline, and internal pressure is greater than molten stove (10) internal pressure of dividing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102864467A CN101935729B (en) | 2009-10-22 | 2009-10-22 | Top loading process for iron-smelting process furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102864467A CN101935729B (en) | 2009-10-22 | 2009-10-22 | Top loading process for iron-smelting process furnace |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101911754A Division CN101693933B (en) | 2009-10-22 | 2009-10-22 | Ironmaking technical furnace top charging technology |
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| CN101935729A CN101935729A (en) | 2011-01-05 |
| CN101935729B true CN101935729B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102864467A Active CN101935729B (en) | 2009-10-22 | 2009-10-22 | Top loading process for iron-smelting process furnace |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123330A (en) * | 1995-09-19 | 1996-05-29 | 冶金工业部重庆钢铁设计研究院 | Composite furnace device |
| CN101386897A (en) * | 2007-09-14 | 2009-03-18 | 中冶赛迪工程技术股份有限公司 | Iron-smelting technology of SDRF furnace |
-
2009
- 2009-10-22 CN CN2010102864467A patent/CN101935729B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123330A (en) * | 1995-09-19 | 1996-05-29 | 冶金工业部重庆钢铁设计研究院 | Composite furnace device |
| CN101386897A (en) * | 2007-09-14 | 2009-03-18 | 中冶赛迪工程技术股份有限公司 | Iron-smelting technology of SDRF furnace |
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| CN101935729A (en) | 2011-01-05 |
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