CN101875985A - Energy-saving emission-reducing intensive blast furnace technology - Google Patents

Energy-saving emission-reducing intensive blast furnace technology Download PDF

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CN101875985A
CN101875985A CN2009101405201A CN200910140520A CN101875985A CN 101875985 A CN101875985 A CN 101875985A CN 2009101405201 A CN2009101405201 A CN 2009101405201A CN 200910140520 A CN200910140520 A CN 200910140520A CN 101875985 A CN101875985 A CN 101875985A
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furnace
oxygen
blast
steel
blast furnace
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冯虎林
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The invention relates to a novel metallurgy steel blast furnace which comprises a short and stout high-pressure bell-less top, a hearth with a graphite carbon furnace wall and an insulating layer. Oxygen spray guns, coal spray guns and fine ore spray guns are inserted into a belly pipe of an air supply device of a hot blast looping pipe, an air inlet tilts downward, the side bottom of the oxygen spray guns tilt upward, and the oxygen spray guns are uniformly distributed on the hearth. The blast furnace is controlled by a thermocouple and a computer, the blast furnace is provided with two steel tapping holes and two slag holes, and four pillars are uniformly distributed. An upturned pipe of the blast furnace is connected with a heavy-removal bag-type electrostatic precipitation suspended ball furnace, and a high-pressure blower is communicated with a cold air preheater, a hot blast heater and the looping pipe. The steel tapping holes are connected with a large runner, slag removers, a cushion kit and a hot metal runner through continuous casting and rolling and cover a heat absorber. The invention has the characteristics of one-time iron and steel smelting, direct melting reduction; energy saving by 36%, emission reduction by 90% and water saving by 95%.

Description

Energy-saving and emission-reduction, intensive blast furnace technology
Technical field the present invention is novel to be that the iron and steel system is formed in a kind of ironmaking, the direct melting and reducing integrated side bottom blowing blast furnace of steel-making and continuous casting and rolling energy-conservation, that emission reduction efficiency is high.
Its whole production technical process is: by fine ore---belt 1---ball dish 2---oven dry spiral tunnel 3---sieve 4---belt 5---feed bin 7---vibratory screening apparatus 8---weighing bucket 10---charging belt 11---no bell furnace roof 12---burner 13---distributor 14---furnace throat 15---ironmaking, the direct melting and reducing of steel-making thermal insulation side bottom blowing blast furnace 55---gravitational dust collection 44---bag-type dust removal system 39---electrostatic precipitator 38---stretched wire type pebble stoves 41; Ironmaking, the adiabatic side bottom blowing of the direct melting and reducing of steel-making blast furnace 55---major groove 56---worn-out slag device 57---buffers packet 58---molten steel dragon ditch 59---continuous casting and continuous rolling mill condenser 60---vibrator 61---secondary cooling 62---straightener 63---cutting machine 64; Molten steel, slag bath heat absorber 53 and 65----cold wind pre-heating system 51 is formed.
Background technology tradition metallurgical technology weak point is that ironmaking, steel-making, direct melting and reducing are divided into independent smelting, cause energy to disperse, source of pollution increase, and particularly the blast-furnace cooled water large usage quantity is polluted and sintering pollution maximum in steel-making, heat waste is the highest, manpower and materials, the energy all can not focus utilizations like this, and productivity is low, and energy consumption is big, seriously polluted, influence climate change.
Summary of the invention the present invention is novel, be energy-conservation, reduction of discharging, recycle heat energy, the shortest iron and steel technical process of the omnidistance adiabatic heat-insulation of the focus utilization energy, save the heat of oxidation and carbon monoxide and water cooling thereof in the converter steelmaking, save physics waste heat and equipment thereof in the direct melting and reducing, save the blast furnace ironmaking cooling heat loss, physics heat is used for preheating cold wind in recovery molten steel, the slag, improve wind-warm syndrome, and eliminate steel-making and pollute, directly melting and reducing pollutes, sintering pollutes, and is the Iron And Steel Industry system of omnibearing energy-saving and emission-reduction.The purpose that the present invention is novel, may realize by following measure: fine ore+coal dust+bath of glass enters belt l and makes φ 20-φ 30 to ball dish 2 and contain coal dust 15%, contain bath of glass 8%-10%, limy stone flour 15% contain briquet, enter flue gas drying spiral tunnel 3, after oven dry, be connected with feed bin 7 to belt 5 through sieve 4, contain briquet and drop to vibratory screening apparatus 8 by feed bin 7, behind the powder that sieves, enter weighing bucket 10, drop to charging belt 11 again, be transported to no bell furnace roof 12, descend and enter burner 13, enter furnace throat 15 through distributor 14, pelletizing progressively drops to cohesive zone 18 tops with coal gas rising preheating, contain briquet and become the porous ferric oxide pellet, change into molten iron again and enter cupola well 31, and a plurality of and positive and negative oxygen rifle 37 common oxygen blast 34 and the calcium oxide powders in furnace bottom center of oxygen rifle at the bottom of the molten iron 32 process sides are 60m by molten iron 32 oxygen blast 34 per ton 3Adiabatic side bottom blowing blast-furnace body 55 aspect ratio are between 2.7-1.63,---bosh---furnace bosh---shaft 16 is by the brick one-tenth of graphite carbon by cupola well 31 for adiabatic side bottom blowing blast furnace 55,3500 ℃ of its refractorinesss under load, the siliceous brick one-tenth furnace wall 16 of carbon is adopted on shaft 16 tops, and furnace wall 16 and outer heat transfer are broken off with 10-15cm thermal insulation layer 17 in its outside.Adiabatic side bottom blowing blast furnace furnace wall 16 fits with thermal insulation layer 17, thermal insulation layer 17 outermost layers are by box hat 69 sealings, heat insulating ability bustle pipe 20 is equipped with in the furnace bosh outside, a bustle pipe 20 and a cover air-supply dress system as: air-supply elbow 21---bellow expander belly pipe 22 is connected with small water sleeve 35 greatly, and downward-sloping 15 °-18 ° be connected with cupola well 31, and oxygen, coal, fine ore spray gun are divided into two independent systems and intersect to be connected with air port 35 and cupola well 31 high-temperature zones with belly pipe 22 and communicate simultaneously.Oxygen, coal, fine ore spray gun are the key equipments of direct melting and reducing.
Oxygen cathete 19 is housed on bustle pipe 20 contains calcium oxide powder, and be connected respectively with 20-48 thread oxygen rifle 25, and thread oxygen rifle 25 is inclined upwardly 27 ° at the bottom of cupola well 31 sides and inserts sum 1/4 number oxygen rifle, in addition 1/4 number oxygen rifle 25 at the bottom of cupola well 31 sides along the circumferential direction in upwards 27 ° insert and stagger respectively with the air port; And thread oxygen rifle 25 adopts the rotation porous nozzles and with hydro carbons vaporization cooling; And cupola well 31 bottom centre adorn positive and negative oxygen rifle 37, and promptly the 1/4+1/4 number equals 1/2 total oxygen rifle and designs for the first line of defence, and 1/2 total oxygen rifle is the design of defence line, second road in addition, and is uniform equally.Two tap holes 29 are on cupola well 31 bottom level circumference, between two air ports and with two cinder notch 33 on the cupola well circumference, 90 ° of its angles, cinder notch 33 exceeds between the furnace bottom 1.33-2.05m, air port 35 exceeds between the furnace bottom 2.3-3.42m between the number 20-48, and 31 1 weeks of uniform cupola well, between the spacing 0.8-1.0m, a week outside restoration of lower stack has 4 pillars, 36 uniform stoves.Blast furnace is merged into two towards sky pipe 46 by four delivery lines 45, puts the valve 47 that looses on it, and---stretched wire type pebble stove system of sack cleaner system 39---electrostatic precipitation 38---41 is connected with downtake 48 and gravitational precipitator 44 in valve 47 belows.High pressure blower is by 4 cold wind preheaters 51---stretched wire type pebble stove 41 is connected with bustle pipe 20, and bustle pipe 20 is communicated with respectively with cupola well 31 with the big small water sleeve 35 of elbow 21---belly pipe 22---respectively.
---worn-out slag device 57---buffering ladle 58---molten steel dragon ditch 59 is connected, and------1 cooling zone 62---straightener 63---cutting machine 64 is connected vibrating mechanism 61 molten steel dragon ditch 59 with continuous casting and continuous rolling mill condenser 60 for outer technology blast furnace tap hole 31 of stove and major groove 56.Energy cycle is utilized technology: major groove 5---and gasification is cooled off and is connected with cold wind preheater 51 respectively in buffering ladle 58 employing circulation heat absorbers 53 covering sealing absorption molten steel physics heat, the continuous casting and continuous rolling mill condenser 60, is used for circulating energy-saving.Slag pond physics thermal recovery slag bath heat absorber 65 is connected with cold wind preheater 51, forms the circulating energy-saving system.Adiabatic side bottom blowing blast furnace point for measuring temperature is connected with computer 70 respectively with outstanding even type pebble stove vault point for measuring temperature thermopair and the machinery control of feed bin below.Whole blast furnace operating is through the probe computer monitor; Combine with circuit automatic control.
Description of drawings Fig. 1 is novel briquet making, the drying system synoptic diagram 1-belt of containing of the present invention; 2-ball dish; 3-is dried spiral tunnel; The 4-sieve; The 5-belt; 6-refractory materials thermal insulation layer; 1 '-belt;
Fig. 2 is the novel feed bin of the present invention, sieve powder, weighing, charging belt structure 7-feed bin; The 8-vibratory screening apparatus; 9-contains the powder storehouse; The 10-weighing bucket; The 11-belt
The novel no bell furnace roof 11-charging belt of Fig. 3 the present invention; 12-does not have the bell furnace roof; The 13-burner; The 14-distributor.
Fig. 4 is the novel steel-making of the present invention, ironmaking, the adiabatic side bottom blowing of direct melting and reducing blast-furnace body synoptic diagram:
The 13-burner; The 15-furnace throat; The 16-furnace wall; The 17-thermal insulation layer; The 18-cohesive zone; 19-oxygen cathete oxygen carrier calcium powder; The 20-bustle pipe; The 21-elbow; 22-belly pipe and expander; 23-oxygen, coal, fine ore spray gun; 24-nitrogen transfer lime; 25-thread oxygen rifle; 26-furnace bottom graphite carbon brick; The 27-furnace foundation; The 28-thermopair; 29-steel mouth; The 30-major groove; The 31-cupola well; The 32-molten steel; The 33-cinder notch; The 34-oxygen blast; The big small water sleeve of 35-air port dress system; The 36-pillar; 37-central oxygen rifle; The 69-furnace shell; The 71-slag.
Fig. 5 is the novel iron and steel process system of a present invention 39-bag-type dust removal system; 40-steel-making, the adiabatic side bottom blowing of the direct melting and reducing of ironmaking blast furnace; 41-stretched wire type pebble stove system; The 42-heating duct; The 43-cold-air duct.
Fig. 6 is the novel iron and steel gas process of the present invention Figure 44-gravitational precipitator; The 45-delivery line; 46-rises towards the sky pipe; 47-diffuses valve; The 48-downtake; 49-heavily removes and cloth bag coal gas pipe connecting; 50-clean coal tracheae; The 39-bag-type dust removal system
Fig. 7 is that the novel cold wind preheater of the present invention synoptic diagram 51-cold wind preheater A-A cuts open and shows view
Fig. 8 is New Cycle heat absorber synoptic diagram 52-circulation heat absorber support of the present invention and thermal insulation layer; 53-circulation heat absorber
Fig. 9 is the novel stretched wire type of the present invention pebble stove synoptic diagram 54-catenarian arch top; 65-magnesia chrome brick lining and furnace wall; The outer thermal insulation layer of 67-furnace wall; 68-vault thermal insulation layer; 66-silica fire resistant ball
Figure 10 is the outer process schematic representation 55-steel-making of the novel stove of the present invention, smelt iron direct melting and reducing, adiabatic side bottom blowing blast furnace; 56-molten steel major groove; The worn-out slag device of 57-; 58-molten steel buffers packet; 59-molten steel Long Gou; The 60-condenser; The 61-vibrator; The 62-secondary cooling zone; The 63-straightener; The 64-cutting machine
Figure 11 is the novel slag bath heat absorber of a present invention synoptic diagram 65-circulation heat absorber; 70-computer (summary)
Embodiment is described in further detail the novel embodiment of the present invention below in conjunction with accompanying drawing: elder generation is with lime powder+8% bath of glass belt 1 goal dish 2 of coal dust+20% of fine ore+15% of grade about 65%, be rolled onto φ 20-φ 30 and contain briquet through the 3 first preheatings of belt 1 ' enter oven dry spiral tunnel, heat up, insulation again, temperature-fall period, along sliding into sieve 4 under 20 ° of the ramp angles, deliver to feed bin 7 to belt 5 again, drop to vibratory screening apparatus 8, behind the sieve powder, enter weighing bucket 10, drop to charging belt 11 again, enter no bell furnace roof 12 by charging belt 11, descend again and enter burner 13, be distributed into furnace throat 15 by distributor 14, enter ironmaking, make steel in the high furnace chamber of the adiabatic side bottom blowing of direct melting and reducing, containing briquet+a small amount of coke moves from top to bottom, being subjected to from bottom to top, gas preheating heats up, be preheating to and contain briquet about 600 ℃ and begin self to take place the indirect reduction reaction, finish the indirect reduction reaction during to 1000 ℃, and become netted ferric oxide pellet, intensity is very big, when dropping to 1200 ℃ of left and right sides, when having arrived cohesive zone 18 positions, ferric oxide pellet fusing slagging iron liquid state falls to passing dynamic slag blanket 71 by cohesive zone 18 and enters steel-making district 32 cupola wells 31.
High pressure blower is by cold wind preheater 51, enter stretched wire type pebble stove system and vault 54 and siliceous ball bed 66 heat-shifts become hot blast more than 1250 ℃, enter corrugated tube belly pipe 22 from bustle pipe 20 through a plurality of hot blast elbows 21, enter big small water sleeve air port dress system 35, it has a down dip 15 °-18 °, the top of the slag 71 in cupola well 31 is blown away the hot blast about 1250 ℃, hot blast is carried secretly by oxygen simultaneously, coal, the fine ore spray gun blows into oxygen about 20%, coal dust 250kg/ ton steel, fine ore 250kg/ ton steel, coal dust obtains burning to the place ahead, air port, fine ore obtains direct melting and reducing iron and slag on cupola well slag blanket 71, molten iron passes slag blanket 71 and enters steel-making district 32, slag liquid floats over 71 li of slag blankets, slag blanket is regularly emitted from cinder notch 33, hot blast stirs slag blanket 71 and the expansion of molten steel contact surface from the air port with 15 ° of-18 ° of angles that have a down dip simultaneously, thereby raising dephosphorization, the desulfurization coefficient, simultaneously, 1250 ℃ hot blast is at cupola well 31 combustion-supporting decline coke and the coal dust that is blown into from the air port, form carbon monoxide and fine ore direct fusion reduction reaction takes place, omnibearing direct reduction reactor takes place with cohesive zone 18 porous ferric oxide pellets, generate slag, iron enters cupola well 31, the generation molten iron passes slag blanket 71 and enters steel-making district 32, slag liquid floats in the slag blanket 71, regularly discharges from cinder notch 33.
The hot blast combusting coal fines, coke produces carbon monoxide and produces direct fusion reduction reaction at cupola well 31 and fine ore, carbon monoxide rises in the cohesive zone 18 and porous ferric oxide pellet generation direct reduction reactor, produce slag 71 and molten iron respectively and drop to steel-making district 32, it produces carbonic acid gas and remaining carbon monoxide moves upward with the gas pressure in the stove, process cohesive zone 18 and stock column thereof are to furnace throat 15 tops, be raised to delivery line 45-towards sky pipe 46-downtake 48-gravitational precipitator 44-bag-type dust removal system 39-clean coal tracheae 50-electrostatic precipitation 38-stretched wire type pebble stove burner and combustion chamber 72, burning produces high-temperature flue gas, with heat transferred stretched wire type pebble stove ball bed 66 and vault 54, transfer of heat is become 1250 ℃ to cold wind, and hot blast is sent into bustle pipe 20 and is connected each air port 35 respectively and enter cupola well 31.
Being blown into 27 ° of thread oxygen rifle updips respectively from oxygen-supply general pipe 19 inserts the Raoul reworked and rotates three hole thread oxygen rifles 25 and be 1/4 of total oxygen rifle quantity, stagger in the air port that is separated by, another 1/4 number oxygen rifles intersect with fore portion oxygen rifle 25 and air port 35 and misplace to tilt in circumferential direction again for 27 ° to updip, in cupola well, produce and rotatablely move to promote molten steel 32, simultaneously, cupola well 31 bottom centre bloom in the oxygen blast of cupola well center in positive and negative oxygen rifle mode, thoroughly eliminate remaining coke and coal dust, this is the designs of cupola well 31 graphite carbon bricking the first line of defences, more than arranges with 1/2 oxygen rifle number; 1/2 oxygen rifle number is used in the same defence line, second road of arranging the oxygen rifle in cupola well 31 second layer cupola well furnace linings in addition; so this cupola well is designed to the double insurance design; oxygen rifle refrigerant cools off with gasification of hydrocarbons; its rifle head top produces mushroom-shaped protective layer; can make oxygen rifle longevity, defence line, second road increases the long-lived index of cupola well again.And the oxygen rifle is not established in steel mouth 29 both sides, each uses the oxygen rifle to blow up the oxygen amount by calculated amount and rate of flow meter, and the calcium oxide powder about load φ 1mm, be inclined upwardly at the bottom of the cupola well side and be blown into molten steel, make steel-making district 32, molten steel decarburization, dephosphorization, desulfurization [c]+[o]=[co] reaction improves greatly, circumference and the comprehensive oxygen blast in center, 31 end of cupola well at the bottom of the cupola well side, the oxygen blast calcium powder, to guarantee that the steel-making quality reaches GB, guarantee that carbon monoxide is fully utilized in direct reduction to slag liquid 71 tops, the heat of oxidation that the side BOTTOM OXYGEN produces is made full use of by the top of the slag 71 tops, and it is burnt energy-conservation to reach joint, eliminate steel-making and pollute, simultaneously by oxygen, coal, the fine ore spray gun sprays into the place ahead, cupola well air port, the pollution that produces direct melting and reducing is eliminated at cupola well, its residue heat energy is fully utilized, and fully combines bottom blowing, the common advantage of side end-blown converter steel-making simultaneously, the advantage that also comprehensive directly fusion reducing furnace is smelted, and the side BOTTOM OXYGEN is when robbing the steel-making of 25 years lime powders, dephosphorization in advance, decarburization, desulfurization is carried out simultaneously.
Producing coal gas of high temperature by cupola well 31 moves upward when containing briquet and coke constantly heat-shift makes coal gas stream reach no bell high pressure furnace roof 12 in moving downward, gas temperature drops to below 300 ℃, at last by manage a downtake one gravitational dust collection one bag-type dust one electrostatic precipitation towards the sky, become purified gas and enter 54 internal-combustions of hotblast stove vault, its ball bed is burnt heat, 1550 ℃ of stretched wire type hot blast furnace roof design temperatures, whole height first half furnace lining uses magnesium chromium founding brick, refractoriness under load is 1750 ℃-1800 ℃, 1600 ℃ of high alumina brick refractorinesss under load of Lower Half liner tile, obtain hot blast and deliver to bustle pipe 20 and high pressure blower carries out heat exchange with cold wind by cold wind preheater 51 1 stretched wire type pebble stove ball beds 66 and vault 54, be blown into cupola well by each inclination air port 35 again, the whole adiabatic that forms closure, the cold wind heating wind process flow process of energy-saving preheating, hotblast stove vault 54 top thermopairs, each point for measuring temperature thermopair 28 of blast furnace all is connected with computer 70, measures each position temperature of control blast furnace.
Adopt oxygen, coal, the breeze spray gun identical with the air port number, wherein 1/2 spray gun with the first layer cupola well side at the bottom of and the center blow layout, another 1/2 oxygen, coal, breeze spray gun standby at the bottom of the 2nd layer of cupola well, side and the center blow layout, the design's cupola well designs for double insurance.Oxygen, coal, breeze spray are robbed 23 and are inserted from belly pipe 22 and to enter air port 35, the hot blast oxygen concentration reaches about 40% before making the air port, more than the 35 the place ahead injecting coal quantity 250kg/ ton steel of air port, more than the spray breeze 200kg/ ton steel, in cupola well 31, produce direct melting and reducing, account for whole reductive 33%, make fuel drop to 320-270kg/ ton steel, utilization coefficient rises between the 4.0-5.01, high like this oxygen enrichment 20% helps with coal powder injection for coke, directly reduces with spray breeze, the direct melting and reducing instead of coke of coal dust, thereby replace direct fusion reducing furnace, and eliminate its pollution.
By once/2 hour tapping, output is pressed utilization coefficient 4.0 and is calculated from the steel mouth, must not tap by decompression operation, prevents the stifled steel quality safety of robbing and destroy, or destroys air port and cinder notch, and calculates oxygen blast rate: m with formula Vu/6 * n rifle 3/ branch prepares corresponding calcium oxide powder and is blown into molten steel from thread oxygen rifle, and oxygen is pressed and equaled blast ten molten steel top of the slag rising * 7.8kg/cm 3/ be 10-12kg/cm 2More than, oxygen rifle 32 is a kind of dynamic operation pressure, being increases with the molten steel amount, to guarantee molten steel oxygen blast 60m per ton 3About.
With 1250 ℃ of hot blasts, the stable briquet composition that contains, stable fine ore grade about 65% and go into the calcium oxide powder of molten steel 32 and alloy powder and inclined to one side silicon methodology with thread oxygen rifle from cupola well 31 side bottom blowings and control low-alloy molten steel composition, the assurance steel quality.Oxygen enrichment pressure and coal powder injection, fine ore pressure equal thermal air pressure ten Xkg/cm 2, to guarantee furnace top pressure 2.5kg/cm 2Thread oxygen rifle 25 pressure should be at blast+slag molten steel pressure kg/cm 2More than.When damping down, change the oxygen rifle earlier and blow with N 2Behind the gas, slowly frustrate material again, guarantee the unimpeded safety of oxygen rifle.
After last molten steel is up to standard, from steel mouth-major groove-worn-out slag device-buffers packet-continuous casting and rolling phase condenser-vibrator-primary cooling zone-straightener-cutting machine-finished steel.
Energy-conservation aspect major groove buffers packet, slag bath are carried out respectively and are covered heat absorber 53 and 65 and the cooling of rolling mill condenser 60 and air port 35 gasification of hydrocarbonss, be connected with the cold wind preheater respectively, form the circulation preheating and replace the comprehensive water saving 95% of water cooling with the heat absorption separation system, energy-conservation 36% heat i.e. 36% coke ratio.
Novel and the modern dispersion smelting of the present invention method is compared and is truly had following advantage:
To make steel, ironmaking, directly the melting and reducing decentralized is smelted intensive integrated, make each concentration of energy utilization, making coal dust is that main coke is secondary comprehensive smelting mode, effectively eliminate steel-making, directly melting and reducing and sintering pollute, strengthen simultaneously dust collection capacity and Combustion of Hot Air Furnace coal gas ability, iron and steel is polluted eliminate about 95%, usage factor is brought up between the 4.0-5.01 by existing 3.2, and water saving is more than 95%, it is energy-conservation to be that the recovery of slag physical thermal accounts for net quantity of heat 36%, namely joint Jiao 36%, is easy to utilize steel plant to transform, and it is novel to reconfigure the present invention during resettlement, small investment, the invention of instant effect is novel.

Claims (11)

  1. The present invention is novel to be that energy-saving and emission-reduction, intensive blast furnace technology system do not have the bell furnace roof by high pressure, and adiabatic blast-furnace body liner is by the brick one-tenth of graphite carbon, and there is bustle pipe at the furnace bosh place, aerobic, coal, breeze winding-up dress system on the belly pipe; Have at the bottom of the side that blowing on inclining inclines with circumferential direction goes up oxygen-blowing gun, the positive and negative oxygen rifle in furnace bottom center, supply air system stretched wire type pebble stove is with cold wind pre-heating system and worktable tap hole, cinder notch, major groove, buffers packet and continuous casting, rolling production steel and be characterised in that:
    1. fine ore contains the bath of glass bonding balling-up of coal and lime powder by pelletizing dish system, through the spiral flue, sends into feed bin with belt behind oven dry, the sieve powder and drops to vibratory screening apparatus and weighing bucket and enter charging belt and be transported to no bell furnace roof.
  2. 2. blast-furnace body belongs to the brick one-tenth of graphite carbon, and high temperature resistant 3500 ℃, its liner skin is not a water coolant, but the above thermal insulating warm-keeping layer of 10cm, and supply air system is that 15 ° of-18 ° of air ports that have a down dip enter cupola well.Belly pipe connecting bend behind the air port, elbow connects bustle pipe, and oxygen enrichment oxygen blast house steward is arranged on the bustle pipe, and slotting oxygen, coal, breeze spray gun are direct melting and reducing peripheral equipments on the belly pipe, two coal dusts, the breeze mixing tank that uses that intersect is connected, and forms two injection systems.
  3. 3. remove steel mouth place and do not establish the oxygen rifle, all establish the oxygen rifle between other air port at the bottom of the side, but 1/2 oxygen rifle the first layer cupola well, 1/2 oxygen rifle is standby at second layer cupola well, furnace bottom central oxygen rifle divides also that the first layer and second layer oxygen rifle are standby to be called cupola well and oxygen rifle double insurance design, wherein an oxygen rifle part tilts 27 ° to the center, and a part of oxygen rifle slopes inwardly 27 ° to circumferential direction, to promote the motion of slag liquid in rotation.
  4. 4. generally design two tap holes, two cinder notch, Shang Xia branch slightly, angle is 90 ° respectively on horizontal plane, and the air port number is determined apart from 0.8-1.0m indirectly by circumference, exceeds cupola well bottom surface 2.3-3.4m, and uniform one week of cupola well, and downward-sloping 15 °-18 °, 4 pillars are arranged, an outer week of uniform stove outside stove.
  5. 5. blast furnace is put two on diffusing valve on the sky pipe, also has worktable, and---sack cleaner---electrostatic precipitator---stretched wire type pebble stove system is connected for effective downtake and gravitational precipitator towards the sky.
  6. 6. adopt high pressure blower 6.5--9kg/cm 2Blast, blower fan is a plurality of by preheater in the cold-air duct, is connected with bustle pipe with the pebble stove system, and the hotblast stove first half is built into magnesia chrome brick, and the bottom is built into high alumina brick, the siliceous ball of ball bed.
  7. 7. the heat absorber on the condenser of major groove, worn-out slag device, buffers packet, slag bath, continuous casting and continuous rolling mill all is connected with preheater in the cold-air duct respectively, and the slag steel is reclaimed in formation, air port physics heat accounts for total heat 36%.
  8. 8. be connected with blast furnace system point for measuring temperature thermopair with computer 70, and be connected with mechanical control device under the feed bin, control feeding system with computer.Whole blast furnace operating combines with circuit automatic control with the computer probe monitors.
  9. 9. this blast furnace is only used oxygen-enriched coal spray and fine ore spray gun, replaces direct melting and reducing equipment, and adopts and to contain coal 15%, and limy powder 15%, bath of glass 8% bonding pelletizing are made blast furnace raw material after drying with the flue spiral tunnel, and coke is only joined 200kg/ ton steel.
  10. 10. steel-making is not polluted, and does not have direct melting and reducing to pollute, and does not have sintering to pollute, and does not have blast-furnace cooled water, have only air port hydro carbons circulation cooling to replace water cooling, thereby the cancellation air port is to the threat of cupola well.
  11. ---11. continuous casting and continuous rolling mill is connected worn-out slag device---buffering ladle---the outer technology of stove: energy-saving and emission-reduction, intensification blast furnace and major groove.
CN2009101405201A 2009-05-02 2009-05-02 Energy-saving emission-reducing intensive blast furnace technology Pending CN101875985A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102485917A (en) * 2010-12-01 2012-06-06 张昭贵 Oblique air supply device
CN102816885A (en) * 2011-06-08 2012-12-12 冯虎林 Iron-making, steel-making and direct fusing reduction integrated blast furnace technology
CN103697696A (en) * 2013-12-27 2014-04-02 钢铁研究总院 Experimental device and experimental method for simulating solid, liquid and gas three-phase running of blast furnaces
CN104164521A (en) * 2014-08-19 2014-11-26 山西太钢不锈钢股份有限公司 Method for detecting blast pressure in blast furnace belly pipe
CN111733309A (en) * 2020-07-13 2020-10-02 首钢集团有限公司 Cooling method and cooling system for converter lining
CN113278747A (en) * 2020-02-20 2021-08-20 宝山钢铁股份有限公司 Method for preventing ash emission from top of blast furnace
CN114350869A (en) * 2022-01-12 2022-04-15 新疆八一钢铁股份有限公司 Oxygen blast furnace type structure with furnace body blowing reducing gas

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102485917A (en) * 2010-12-01 2012-06-06 张昭贵 Oblique air supply device
CN102816885A (en) * 2011-06-08 2012-12-12 冯虎林 Iron-making, steel-making and direct fusing reduction integrated blast furnace technology
CN103697696A (en) * 2013-12-27 2014-04-02 钢铁研究总院 Experimental device and experimental method for simulating solid, liquid and gas three-phase running of blast furnaces
CN103697696B (en) * 2013-12-27 2015-11-25 钢铁研究总院 Analog blast furnace solid-liquid-gas three phase running experiment device and method
CN104164521A (en) * 2014-08-19 2014-11-26 山西太钢不锈钢股份有限公司 Method for detecting blast pressure in blast furnace belly pipe
CN104164521B (en) * 2014-08-19 2016-01-27 山西太钢不锈钢股份有限公司 A kind of method checking straight blowing pipe of blast furnace inner blower pressure
CN113278747A (en) * 2020-02-20 2021-08-20 宝山钢铁股份有限公司 Method for preventing ash emission from top of blast furnace
CN111733309A (en) * 2020-07-13 2020-10-02 首钢集团有限公司 Cooling method and cooling system for converter lining
CN111733309B (en) * 2020-07-13 2022-04-19 首钢集团有限公司 Cooling method and cooling system for converter lining
CN114350869A (en) * 2022-01-12 2022-04-15 新疆八一钢铁股份有限公司 Oxygen blast furnace type structure with furnace body blowing reducing gas
CN114350869B (en) * 2022-01-12 2023-02-14 新疆八一钢铁股份有限公司 Oxygen blast furnace type structure with furnace body blowing reducing gas

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