CN202279831U - High blast temperature swirl injection perturbation smelting reduction and pre-reduction integrated device - Google Patents

Abstract

A high blast temperature swirl injection perturbation smelting reduction and pre-reduction integrated device belongs to the technical field of smelting reduction. The device comprises a raw material system, a furnace top charging and distributing system, a smelting reduction furnace, a furnace top high-temperature coal gas system, a pre-reduction furnace, a carbocoal gas recycling system, a powder coal preparation and coal injection system, a molten iron desulfurization agent preparation and injection device, an oxygen and nitrogen supplying system, an iron scrap treatment system, a high blast temperature air heating furnace, a smelting reduction furnace blower, a furnace top coal gas dust removing and recovering system, and a coal gas cogeneration device. High-temperature coal gas produced by the high blast temperature swirl injection perturbation smelting reduction furnace is guided into the pre-reduction furnace, so that ferriferous raw material in a solid phase state is directly reduced into pre-reduction furnace charge with a certain metallization ratio; and after being cooled, the pre-reduction furnace material and carbocoal, which respectively serve as furnace charge and fuel, are added into the smelting reduction furnace, and the pre-reduction furnace material is finally reduced to produce molten iron. The device has the advantages of high production efficiency, low energy consumption, easiness in operation, and realization of industrialization.

Description

High wind-warm syndrome swirl injection disturbance melting and reducing and prereduction machinery

Technical field

The utility model belongs to the melting and reducing technical field, and a kind of high wind-warm syndrome swirl injection disturbance melting and reducing and prereduction machinery particularly are provided.

Background technology

Along with the fast development of China's Iron And Steel Industry, to the also constantly increase of demand of coking coal, to the later stage in this century, China's coking coal resource will can't bear the heavy load, and can't satisfy the requirement of iron and steel production capacity.The blast furnace ironmaking that relies on coke production can't be realized Sustainable development.Therefore the iron-smelting process flow process of development and utilization mill coal is the inexorable trend of sustainable development of iron and steel industry.

The mill coal ironmaking technology is meant and does not use coke to carry out the various process methodes of metallurgical production process, by product type and purposes, can be divided into direct-reduction process and smelting reduction process.

Direct-reduction process is meant uses gas, liquid and mill coal to be reductive agent, at raw materials such as solid-state down reducing iron ore, pellets, obtains the spongy dri that porous contains impurity such as gangue.This dri can substitute steel scrap; As the Electric furnace steel making raw material; Its main method that realizes suitability for industrialized production dri iron is: the HYL-ZR shaft furnace process of the MIDREX shaft furnace process of the U.S. and the research and development of Mexico Xi Ersa (HYLSA) company, these two kinds of methods all adopt Sweet natural gas as the reducing gas raw material.

Smelting reduction process is meant with the mill coal to be the reductive agent and the energy, and reduction iron production raw material under the condition of high temperature obtains the method for liquid molten iron and slag.

Have only COREX and FINEX smelting reduction process to realize suitability for industrialized production at present, other technology also is in commerical test or semipilot stage.

Ironmaking technique of fusion and reduction mainly is " two step method ": promptly the first step is prereduction, is main with the indirect reduction reaction; Second step was whole reduction, directly to be reduced to main reducing process.Based on the effect of prereduction, the ironmaking technique of fusion and reduction of research and development can be divided into following two big types at present: (1) prereduction degree height and the low technology of post-combustion rate serve as typical case's representative with COREX technology.COREX process using top shaft furnace carries out prereduction, produces (CO+H with the fusion and gasification furnace final reduction ₂The coal gas of high temperature of)>=95% adds part and purifies cooled coal gas, and this mixed gas temperature is adjusted to about 850 ℃; And deliver to the top shaft furnace; Carry out lump ore or pelletizing prereduction, reach after the dri of degree of metalization＞90%, get into melter-gasifier melts again and be reduced into molten iron.(2) technology that the prereduction degree is low and post-combustion rate is high serves as typical case's representative with the Hismelt process method.Technology is simple, belongs to iron and bathes " single stage method " ironmaking technique of fusion and reduction.With fine ore and fine coal is crude fuel; Adopt oxygen enrichment preheated air (oxygen enrichment 30%～40%, 1200 ℃ of air preheating temperatures) to carry out secondary combustion; Post-combustion rate reaches 50%～70%.

Summary of the invention

The purpose of the utility model provides a kind of high wind-warm syndrome swirl injection disturbance melting and reducing and prereduction machinery, is beneficial to sustainable development of iron and steel industry; Be particularly suitable for by traditional blast furnace iron-making process technology, to the device of the transition and the development of non-blast furnace ironmaking Technology.The utility model does not rely on coke; Use mill coal and various iron-bearing material (agglomerate, pellet, lump ore) through the pre-reducing furnace reduction; Iron-bearing material reduced under solid state shape becomes the prereduced burden material with certain degree of metalization; Prereduced burden material and mill coal are joined simultaneously again and carry out fusion reduction eventually in a kind of high wind-warm syndrome swirl injection disturbance fusion reducing furnace, final production goes out molten iron.

The utility model uses iron-smelting raw material through the pre-reducing furnace reduction; The prereduction temperature is 850～950 ℃, and iron-bearing material reduced under solid state shape becomes the iron-bearing material with 40%～60% degree of metalization, after overcooling, obtains drop temperature and be 100～150 ℃ prereduced burden material; Again prereduced burden material and semicoke are passed through adhesive tape conveyor and top charging equipment; By batch joining in the fusion reducing furnace, adopt oxygen-enriched coal spray and high wind-warm syndrome air blast (total oxygen enrichment percentage is 5%～14%, and blast temperature is 1250～1350 ℃); The post-combustion rate of cupola well coal gas is 10%～20%, adopts the swirl injection disturbance ^{[note 1]}The iron-smelting process method is gone back original production molten iron and slag eventually.900～1000 ℃ the high temperature stock gas that pre-reducing furnace produces with fusion reducing furnace mixes with the semicoke coal gas of adding through half purified gas after the high temperature cyclone dust removal, uses reducing gas as pre-reducing furnace.Dust by high-temperature cyclone dust extractor is collected through recycling system, sprays into cupola well with the protection furnace lining by the multifunction spray gun that is arranged on fusion reducing furnace cupola well top.The utility model belongs to the two-step approach ironmaking technique of fusion and reduction.

The high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction machinery; Its main technique device is: the one, and high wind-warm syndrome swirl injection disturbance fusion reducing furnace; It is characterized in that fixed shaft furnace and adopt high wind-warm syndrome swirl injection perturbation scheme to carry out the iron-bearing material melting and reducing, be designated hereinafter simply as fusion reducing furnace; The 2nd, high wind-warm syndrome swirl injection disturbance melting and reducing pre-reducing furnace; It is characterized in that fixed shaft furnace, and the coal gas of high temperature that adopts high wind-warm syndrome swirl injection disturbance fusion reducing furnace to produce, iron-bearing material is directly reduced at solid state shape; Become prereduced burden material with 40%～60% degree of metalization; After overcooling,, thereby be called high wind-warm syndrome swirl injection disturbance melting and reducing and go back stove in advance, be designated hereinafter simply as pre-reducing furnace as the fusion reducing furnace furnace charge.

The high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction machinery comprise: feed circuit; Top charging and cloth system; Fusion reducing furnace; Furnace roof coal gas of high temperature system; Pre-reducing furnace; Semicoke coal gas recycling system; Pulverized coal preparation and coal injection system; Iron melt desulfurizing agent preparation and blowing device; Oxygen and nitrogen supply (NS) system; Slag iron treatment system; High-blast-temperature hot-blast stove; The fusion reducing furnace gas blower; Stock gas dedusting and recovery system; The coal gas cogeneration system.Feed circuit links to each other with fusion reducing furnace and pre-reducing furnace respectively through top charging and distribution device; Furnace roof coal gas of high temperature system links to each other with fusion reducing furnace through the coal gas of high temperature pipeline; Pre-reducing furnace links to each other with furnace roof coal gas of high temperature system through the coal gas of high temperature pipeline; Semicoke coal gas pressurization recycling system links to each other with pre-reducing furnace through pipeline; Pulverized coal preparation and coal injection system link to each other with fusion reducing furnace through pipeline, and iron melt desulfurizing agent preparation and blowing device link to each other with fusion reducing furnace through pipeline, and oxygen links to each other with fusion reducing furnace through pipeline with the nitrogen supply (NS) system; Slag iron treatment system links to each other with fusion reducing furnace through the slag iron runner; High-blast-temperature hot-blast stove links to each other with fusion reducing furnace through hot air duct, and the fusion reducing furnace gas blower links to each other with high-blast-temperature hot-blast stove through cold air duct, and the stock gas dedusting links to each other with pre-reducing furnace through gas line with recovery system; The coal gas cogeneration system links to each other with stock gas dedusting and recovery system through gas line, and the fusion reducing furnace gas blower links to each other with the coal gas cogeneration system through the high voltage supply cable.

Feed circuit comprises adhesive tape conveyor, materials flow reversing valve, No. 1 material loading conveyor drive, No. 2 material loading conveyor drives under sinter machine, pellet-roasting machine, stock yard stacker-reclaimer, conveyor drive, fuel coal drying, semicoke preparation facilities, storage ore deposit groove loading and unloading material car and conveyor drive, crude fuel storage ore deposit groove and gate, feeding machine, vibratory screening apparatus, weighing jar, the storage ore deposit groove.

Sinter machine links to each other with storage ore deposit groove loading and unloading material car and conveyor drive through conveyor drive; The pellet-roasting machine links to each other with storage ore deposit groove loading and unloading material car and conveyor drive through conveyor drive; The stock yard stacker-reclaimer links to each other with storage ore deposit groove loading and unloading material car and conveyor drive through conveyor drive; Fuel coal is dry, the semicoke preparation facilities links to each other with storage ore deposit groove loading and unloading material car and conveyor drive through conveyor drive; Storage ore deposit groove loading and unloading material car and conveyor drive link to each other with each conveyor drive with rubber seal through chute; Crude fuel storage ore deposit groove and gate link to each other with groove loading and unloading material car and conveyor drive with rubber seal through chute, and feeding machine links to each other with crude fuel storage ore deposit groove and gate with rubber seal through chute, and vibratory screening apparatus links to each other with feeding machine with rubber seal through erection bolt; The weighing jar links to each other with vibratory screening apparatus with rubber seal through chute; Conveyor drive links to each other with the weighing jar with rubber seal through chute under the storage ore deposit groove, and conveyor drive linked to each other under the materials flow reversing valve passed through chute and rubber seal and stores the ore deposit groove, and No. 1 the material loading conveyor drive links to each other with the materials flow reversing valve with rubber seal through chute with No. 2 material loading conveyor drives.

Top charging and cloth system comprise No. 1 materials flow reversing valve and left and right batch can, No. 2 materials flow reversing valves and left and right batch can, No. 1 bellless distributor and distributor chute, No. 2 high temperature resistant bellless distributors and distributor chute, pipe network low temperature coal gas pressure cooling system, fan-shaped heat insulation gate, top charging equipment trip valve.No. 1 materials flow reversing valve and left and right batch can thereof link to each other with No. 1 material loading conveyor drive with rubber seal through chute; No. 2 materials flow reversing valves and left and right batch can thereof link to each other with No. 2 material loading conveyor drives with rubber seal through chute; No. 1 bellless distributor and distributor chute link to each other with No. 1 materials flow reversing valve and left and right batch can through bellow expander flange and bolt, and No. 1 bellless distributor and distributor chute pass through bolt and link to each other with the lip ring flange of pre-reducing furnace body; No. 2 high temperature resistant bellless distributors and distributor chute link to each other with No. 2 materials flow reversing valves and left and right batch can through bellow expander flange and bolt; Pipe network low temperature coal gas pressure cooling system links to each other with No. 2 high temperature resistant bellless distributors and distributor chute through pipeline; Fan-shaped heat insulation gate links to each other with No. 2 high temperature resistant bellless distributors and distributor chute through bolt; Top charging equipment trip valve one end links to each other with fan-shaped heat insulation gate through bolt, and the other end links to each other with the lip ring flange of melting and reducing furnace body through bolt.

Fusion reducing furnace comprises melting and reducing furnace body, stock gas delivery line, air-supply bustle pipe, air-supply arrangement, upward spout, dust recycle device, iron mouth frame, the air port infrared rays of exhaust outlet, following exhaust outlet, stopper formula volume adjusting apparatus, oxygen coal spray gun and multifunction spray gun are spied on appearance, the furnace roof radar is surveyed charge level appearance, furnace roof infrared pick-up appearance and thermal technology's proofing unit.The stock gas delivery line links to each other with the melting and reducing furnace body by pipeline welding; The air-supply bustle pipe links to each other with high-blast-temperature hot-blast stove by pipeline; Air-supply arrangement links to each other with the air-supply bustle pipe with bolt by flange; Last row, following exhaust outlet link to each other with the melting and reducing furnace body with bolt by flange, and the melting and reducing furnace body links to each other with top charging and distribution device by lip ring; Stopper formula volume adjusting apparatus links to each other with following exhaust outlet by air-supply arrangement; The spout of oxygen coal spray gun and multifunction spray gun links to each other with the melting and reducing furnace body with bolt by flange; The dust recycle device links to each other with multifunction spray gun with flange by pipeline; Iron mouth frame links to each other with the melting and reducing furnace body by welding; The air port infrared ray is spied on appearance and is linked to each other with air-supply arrangement with pipeline by flange, and the furnace roof radar is surveyed charge level appearance, furnace roof infrared pick-up appearance and thermal technology's checkout gear and linked to each other with the melting and reducing furnace body with pipeline by flange.

The melting and reducing furnace body is made up of furnace bottom, cupola well, tuyere zone, shaft, burner, furnace roof shrouding, lip ring, furnace top flange, refractory lining, cooling apparatus, furnace shell.Furnace bottom links to each other with the nfrastructure and the drop-bottom of shaft furnace, for cylindrical or truncated cone-shaped, builds by laying bricks or stones through refractory lining, and the cooling apparatus pipeline is connected with the furnace shell base plate with welding process; Cupola well is above furnace bottom, and profile is cylindrical or truncated cone-shaped, and the center is a cylindrical space; Cupola well is provided with iron notch; Cupola well top also is provided with the spout that oxygen coal spray gun and multifunction spray gun are installed, and builds by laying bricks or stones through refractory lining, and the cooling apparatus pipeline is connected with furnace bottom place furnace shell with welding process; Tuyere zone is above cupola well, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, and tuyere zone is provided with the two rows air port, builds by laying bricks or stones through refractory lining, and the cooling apparatus pipeline is connected with cupola well place furnace shell with welding process; Shaft is above tuyere zone, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, builds by laying bricks or stones through refractory lining, and the cooling apparatus pipeline is connected with tuyere zone place furnace shell with welding process; Burner is above shaft, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, and burner is provided with the stock gas delivery line, builds by laying bricks or stones through refractory lining, and the cooling apparatus pipeline is connected with shaft place furnace shell with welding process; The furnace roof shrouding is above burner, and profile is cylindrical, and the center is a cylindrical space; Build by laying bricks or stones through refractory lining, the cooling apparatus pipeline is connected with burner place furnace shell with welding process; Lip ring is built by laying bricks or stones with welding process through refractory lining and to be connected with furnace roof shrouding place furnace shell above the furnace roof shrouding; Furnace top flange links to each other with lip ring through bolt connection mode above lip ring.

Furnace roof coal gas of high temperature system is made up of coal gas high-temperature trip valve, high-temperature cyclone dust extractor, heating gas pipeline and refractory lining.The coal gas high-temperature trip valve links to each other with fusion reducing furnace stock gas delivery line through the welding of bellow expander connecting tube; High-temperature cyclone dust extractor links to each other with the coal gas high-temperature trip valve through the heating gas pipeline, and high-temperature cyclone dust extractor links to each other with the gas dust recycle device through pipeline.

Pre-reducing furnace comprises that pre-reducing furnace body, stock gas delivery line, distributor chute access opening, prereduced burden material cool off with circulating gas system, discharge system, bin stock system, haul system.The stock gas delivery line links to each other with the pre-reducing furnace body by pipeline welding; The distributor chute manhole links to each other with the pre-reducing furnace body by welding; The prereduced burden material cooling links to each other with the pre-reducing furnace body by the gas piping welding with the circulating gas system; Discharge system links to each other with the pre-reducing furnace body by welding, and the bin stock system connects the pipeline welding manner by bellow expander and links to each other with the valve of pre-reducing furnace discharge system, and the haul system links to each other with the bin stock system with rubber seal by chute.

The pre-reducing furnace body is made up of furnace top flange, lip ring, furnace roof shrouding, burner, gas export control, distributor chute access opening, furnace throat, shaft, furnace bosh, bosh, cupola well, refractory lining and furnace shell.Furnace top flange links to each other with lip ring through bolt connection mode; Lip ring is connected with furnace roof shrouding place furnace shell through welding process below furnace top flange; The furnace roof shrouding is below lip ring, and profile is cylindrical, and the center is a cylindrical space, builds by laying bricks or stones and welding process is connected with burner place furnace shell through refractory lining; Burner is below the furnace roof shrouding, and burner is provided with stock gas delivery line and distributor chute access opening.The burner profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with furnace throat place furnace shell through refractory lining; The stock gas delivery line is built by laying bricks or stones and welding process is connected with burner place furnace shell through refractory lining above burner.The distributor chute access opening is connected with burner place furnace shell through welding process; Furnace throat is below burner, and profile is cylindrical, and the center is a cylindrical space, builds by laying bricks or stones and welding process is connected with shaft place furnace shell through refractory lining; Shaft is below furnace throat, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with furnace bosh place furnace shell through refractory lining; Furnace bosh is provided with high temperature reduction gas entry pipe below shaft, build by laying bricks or stones and welding process links to each other with high-temperature cyclone dust extractor through refractory lining; The furnace bosh profile is cylindrical; The centre is provided with the hollow ring casing, and ring casing is built by laying bricks or stones through refractory lining and welding process links to each other with high temperature reduction gas entry pipe, and the ring casing bottom evenly is provided with a plurality of ducts; The duct medullary ray is arranged along pre-reducing furnace furnace bosh cross-section radial; Duct medullary ray and horizontal plane are 45～60 ° of angles downwards, and the duct can be shapes such as circular, square, rectangle, and the duct communicates with the central cylindrical space.Furnace bosh is built by laying bricks or stones through refractory lining and welding process is connected with bosh place furnace shell; Bosh is below furnace bosh, and profile is up big and down small truncated cone-shaped, and the center is up big and down small truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with cupola well place furnace shell through refractory lining.The bosh middle and upper part is provided with the cooling of bosh furnace charge and uses the circulating gas fairlead, and the bosh bottom is provided with the circulating gas inlet tube, and each gas line links to each other with bosh place furnace shell through welding.Be provided with the access mouth of pipe of smashing glassware, nitrogen big gun in the middle and lower part, bosh area, link to each other with bosh place furnace shell through flange and pipeline welding mode; Cupola well is below bosh, and profile is cylindrical, and the center is a cylindrical space.Cupola well section bottom is provided with discharge gate, links to each other with the valve of discharge system through pipeline welding mode and flange.

Prereduced burden material cools off with the circulating gas system by coal gas heat exchanger, low temperature purified gas input system, coal gas desulfurization device, CO ₂Transformation adsorbing and removing device, coal gas refrigeration cycle press are formed.The coal gas heat exchanger has four pipe joints; Link to each other with the import and export pipe of high and low temperature end with flange with pipeline welding respectively: the temperature end inlet tube links to each other with the bosh gas export control; The temperature end outlet pipe links to each other with coal gas desulfurization device portal pipe; The low-temperature end inlet tube links to each other with the purified gas pipeline of stock gas dedusting and recovery system, and the low-temperature end outlet pipe links to each other with the gas line of high-blast-temperature hot-blast stove system; The coal gas desulfurization device links to each other CO with flange with coal gas heat exchanger outlet pipe flange through pipeline welding ₂Transformation adsorbing and removing device links to each other with coal gas desulfurization device outlet pipe flange with flange through pipeline welding, and the gas compressor inlet tube is through pipeline welding and flange and CO ₂Transformation adsorbing and removing device outlet pipe links to each other, and the gas compressor outlet pipe links to each other with pre-reducing furnace bosh gas entry pipe with flange through pipeline welding.

The pre-reducing furnace discharge system is formed by smashing glassware, nitrogen big gun, fork-shaped shutting off valve, quadrant valve, threeway material distributing valve, coal gas sealed butterfly valve.Smashing glassware smashes glassware access port pipeline through pipeline welding and flange with the pre-reducing furnace bosh and links to each other; The nitrogen big gun links to each other with pre-reducing furnace bosh nitrogen big gun access port pipeline through pipeline welding and flange; The fork-shaped shutting off valve links to each other with pre-reducing furnace cupola well discharge gate through pipeline welding and flange; Quadrant valve links to each other with the fork-shaped shutting off valve through pipeline welding and flange; The threeway material distributing valve links to each other with quadrant valve through pipeline welding and flange, and the coal gas sealed butterfly valve links to each other with the threeway material distributing valve through pipeline welding and flange.

Pre-reducing furnace bin stock system is by adapting pipe, upper sealing valve, material-storage jar and weighing device thereof, all pressure and purge valve, the equal pressing system of nitrogen, fan-shaped blow-off valve, lower seal valve are formed.Adapting pipe links to each other with the coal gas sealed butterfly valve through bellow expander pipeline welding and flange; Upper sealing valve links to each other with adapting pipe through pipeline welding and flange; Material-storage jar links to each other with upper sealing valve through pipeline welding and flange; The material-storage jar weighing device links to each other with electronic scale through pipeline welding and flange, and pressure-balance valve and purge valve link to each other with the material-storage jar housing through pipeline welding and flange, and the equal pressing system of nitrogen links to each other with pressure-balance valve through pipeline and flange; Fan-shaped blow-off valve links to each other with material-storage jar through pipeline welding and flange, and the lower seal valve links to each other with fan-shaped blow-off valve through pipeline welding and flange.

Pre-reducing furnace haul system is made up of weighing funnel, materials flow gate, adhesive tape conveyor.Weighing funnel links to each other with the lower seal valve with rubber seal through chute, and the materials flow gate links to each other with weighing funnel through pipeline welding and flange, and adhesive tape conveyor links to each other with the materials flow gate with rubber seal through chute.

Semicoke coal gas recycling system is become by gas stop valve, gas flow variable valve, flow measurement device, nitrogen purging device, gas bleeding valve, semicoke coal gas Pressure Unit.Gas stop valve links to each other with the semicoke preparation facilities of feed circuit through pipeline welding and flange; The gas flow variable valve links to each other with gas stop valve through pipeline welding and flange; Flow measurement device links to each other with the gas flow variable valve through pipeline welding and flange; Nitrogen purging device links to each other with the semicoke feed channel through pipeline welding and flange; Gas bleeding valve links to each other with the semicoke feed channel through pipeline welding and flange, and semicoke gas compressor inlet links to each other with flow measurement device through pipeline welding and flange, and the outlet of semicoke gas compressor links to each other with pre-reducing furnace bosh gas entry pipeline through pipeline welding and flange.

Coal dust system respectively reaches coal injection system and is made up of indoor coal storage yard, clamshell-equipped crane, coal blending bucket, Weighing type adhesive tape feeder, adhesive tape conveyor, electric magnetic iron remover, run coal bin, feeder, medium-speed pulverizer, waste gas trip valve, waste gas regulating valve, waste gas induced draft fan, mixed wind process furnace, coal gas system and burner blower, coal dust bag collector, Powder discharging fan, Pulverized Coal Bin, winding-up jar, mixing tank, divider, pulverized coal gun and oxygen coal spray gun, nitrogen pot and nitrogen valve.Indoor coal storage yard links to each other with stock yard through raw coal haulage system, and clamshell-equipped crane links to each other with power supply system through cable, and the coal blending bucket links to each other with the basis through steelwork; Weighing type adhesive tape feeder links to each other with the coal blending bucket with seal closure through chute; Adhesive tape conveyor links to each other with Weighing type adhesive tape feeder with seal closure through chute, and electric magnetic iron remover links to each other with adhesive tape conveyor through steel structure platform, and run coal bin links to each other with adhesive tape conveyor with seal closure through chute; Feeder links to each other with run coal bin through pipeline; Medium-speed pulverizer links to each other with feeder with seal closure through chute, and the waste gas trip valve links to each other with the hot-blast stove flue pipe through pipeline, and links to each other with waste gas regulating valve, waste gas induced draft fan, mixed wind process furnace, medium-speed pulverizer successively through pipeline; Coal gas system links to each other with mixed wind process furnace through pipeline with burner blower; The coal dust bag collector links to each other with medium-speed pulverizer through pipeline, and Powder discharging fan links to each other with the coal dust bag collector through pipeline, and Pulverized Coal Bin links to each other with the coal dust bag collector through pipeline; And link to each other with winding-up jar, mixing tank, divider, pulverized coal gun and oxygen coal spray gun successively through pipeline, nitrogen pot nitrogen valve gate open piping links to each other with pulverized coal preparation and coal injection system.

Iron melt desulfurizing agent preparation and blowing device are made up of apparatus for preparing desulphurizing agent, sweetening agent bin, sweetening agent winding-up jar, equal row pressure device, divider, multifunction spray gun, nitrogen pot and nitrogen valve.Apparatus for preparing desulphurizing agent links to each other with transportation system; The desulfurizing agent bin links to each other with apparatus for preparing desulphurizing agent by lifting device; Desulfurizing agent winding-up jar links to each other with the desulfurizing agent bin by pipeline, and all the row pressure device links to each other by pipeline and desulfurizing agent winding-up jar, and distributor links to each other with desulfurizing agent winding-up jar by pipeline; Multifunction spray gun links to each other with distributor by pipeline, and nitrogen pot and nitrogen valve gate open piping link to each other with blowing device.

Oxygen and nitrogen supply (NS) system diffuse valve, oxygen nitrogen blow down valve, oxygen nitrogen pipeline and oxygen nitrogen valve by oxygenerator, oxygen compressor, nitrogen compressor, oxygen spherical tank, nitrogen spherical tank, oxygen nitrogen trip valve, oxygen nitrogen variable valve, oxygen nitrogen repid cut-off valve, oxygen nitrogen reducing valve, oxygen nitrogen and form.Oxygenerator links to each other with atmosphere through air filter; And link to each other with oxygen compressor, nitrogen compressor, oxygen spherical tank, nitrogen spherical tank, oxygen nitrogen trip valve, oxygen nitrogen variable valve, oxygen nitrogen repid cut-off valve, oxygen nitrogen reducing valve successively with valve through pipeline, oxygen nitrogen diffuses valve, oxygen nitrogen blow down valve passes through pipeline and links to each other with the nitrogen supply (NS) system with oxygen.

Slag iron treatment system is made up of slag iron runner, clay gun, iron perforater, swing chute, iron ladle transport trolley, slag granulation device, the conveyor drive of mucking haulage, grain slag stockyard.The slag iron runner links to each other with the fusion reducing furnace tapping hole by civil engineering structure; Clay gun links to each other with foundation of civil work with nut by foundation bolt; Iron notch drill links to each other with foundation of civil work with nut by foundation bolt, and clay gun and iron notch drill link to each other with tapping hole respectively when tapping a blast furnace operation; The swing chute flows by molten iron and links to each other with the slag iron runner; The hot-metal bottle transport vehicle links to each other with the swing chute by hot-metal bottle splendid attire molten iron, and the slag granulation device links to each other with tapping hole by the slag iron runner, and links to each other with the sealing-tape machine of mucking haulage, grain slag stockyard successively.

High-blast-temperature hot-blast stove is made up of hot-blast furnace body and valve thereof, combustion air preheater, gas preheating device, chimney heat exchanger, burner blower, wind mixed chamber, cold wind snorting valve, cold-air duct, gas pipe, combustion-supporting airduct, hot air duct.Hot-blast furnace body and valve thereof link to each other with the cold wind snorting valve through cold-air duct; The combustion air preheater links to each other with hot-blast furnace body and valve thereof through combustion-supporting airduct; The gas preheating device links to each other with hot-blast furnace body and valve thereof through gas pipe, and chimney heat exchanger links to each other with combustion air preheater, gas preheating device through heat-transfer medium, and burner blower links to each other with the combustion air preheater through combustion-supporting airduct; Wind mixed chamber's one end links to each other with hot-blast furnace body and valve thereof through heating duct; And link to each other with cold-air duct through pipeline and valve, wind mixed chamber's the other end links to each other with bustle pipe through heating duct, and the cold wind snorting valve passes through cold air duct and links to each other with the fusion reducing furnace gas blower; And, link to each other with the oxygen supply system pipeline through oxygen channel and valve in gas blower one side near the cold wind snorting valve.

The fusion reducing furnace gas blower by air filter, stator blade adjustable shaft streaming motor fan, snorting valve, diffuse valve, variable valve, reverse checkvalve, trip valve fast and form.Air filter links to each other with atmosphere through pipeline, and through pipeline successively with trip valve, variable valve, stator blade adjustable shaft streaming motor fan, snorting valve, diffuse valve, variable valve, reverse checkvalve, trip valve fast and link to each other.

Stock gas dedusting and recovery system are by coal gas tornado dust collector, coal gas heating and cooling device, gas dry method pocket type dust-removal system, low temperature pressing gas CO ₂Remove device and fusion reducing furnace furnace roof air cooling system, stock gas pressure regulating device, coal gas differential pressure power generation device (TRT) composition.The coal gas tornado dust collector link to each other with pre-reducing furnace stock gas delivery line through pipeline; And link to each other low temperature pressing gas CO with coal gas heating and cooling device, gas dry method pocket type dust-removal system, stock gas pressure regulating device and coal gas differential pressure power generation device (TRT) successively through pipeline ₂Removing device and fusion reducing furnace furnace roof air cooling system links to each other with fusion reducing furnace through pipeline and valve.

The coal gas cogeneration system is made up of gas chamber, boiler, steam turbine generation machine, high voltage power distributing cabinet, high-tension transformer.Gas chamber links to each other with stock gas dedusting and recovery system with valve by pipeline; Boiler links to each other with gas chamber with valve by gas piping; The steam turbine generation machine links to each other with boiler with valve by jet chimney, and links to each other with high voltage power distributing cabinet, high-tension transformer by high-tension cable.

In sum, compared with prior art, the high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction device and method have following advantage:

1) melting and reducing and prereduction machinery and method can be under the condition of main fuel disobeying the coke of relying, and carry out suitability for industrialized production;

2) the crude fuel use range is extensive: in the iron-bearing material, agglomerate, pellet, natural ore deposit are used alone or in combination; Be the comprehensive utilization coal resources, the scale operation device is advisable to use semicoke; The production equipment of small scale can use dried lump coal to be fuel;

3) adopt the non-bell furnace top charging equipment charging, help the control of materials flow distribution and charge level, help the high top pressure operation;

4) adopt high wind-warm syndrome oxygen enriched blast and coal injection, help combustion reactions to carry out, produce high temperature and reducing gas, for the ferriferous oxide reduction provides great amount of heat energy and reducing gas at crucible zone; The setting of two outlet opening, the division of labor and cooperation for the reduction of crucible zone ferriferous oxide, provide thermodynamics and dynamic conditions; With oxygen coal spray gun prereduced burden material is sprayed disturbance ^{[note 1]}Acting in conjunction under, on slag, iron liquid interface, accomplish the direct reduction reactor process, form slag and molten iron.Need based on production operation, can regulate the blast energy in each air port;

5) cupola well top also is provided with the spout that oxygen coal spray gun and multifunction spray gun are installed; Oxygen coal spray gun through inserting can be regulated cupola well furnace temperature, carbon, oxygen quantity and ratio; Can further improve into the stove amount of oxygen; Can make the average oxygen concentration of air that gets in the cupola well reach 26%～35%, can improve coal powder injection ratio in the cupola well, to regulate and to control slag iron place in the cupola well; Physical Chemistry of Metallurgy reaction conditions and strengthening smelting operation, the post-combustion rate of cupola well coal gas is 10%～20%;

6) the multifunctional furnace dirt spray gun through inserting can increase this place's slag viscosity, reduces cupola well furnace lining surface temperature, to improve the brick lining life-span; Multi-functional sweetening agent spray gun through inserting can lower sulfur content of hot metal fast;

7) whole fusion process is divided into solid state shape prereduction and molten state two steps of whole reduction, in two reactor drums, accomplishes respectively; This two-step process has lower energy consumption and higher production efficiency; Can also make full use of the flexibly linking that requires of existing traditional process equipment and new process and device;

8) melting and reducing and prereduction machinery have flexible operation, safe and reliable characteristics; The method of operation and maintenance and experience all can be used for reference in the novel process device and method in traditional process equipment, help this The Application of Technology and popularization; Spy on appearance and the fiber optic conduction The Application of Technology can be reflected to the picture of production status in the stove on the TV screen of watch-keeping cubicle timely and accurately by means of furnace roof infrared pick-up appearance, air port infrared rays, make smelting process visual.

9) this melting and reducing and prereduction machinery and method are applicable to the requirement of all size smelting ability, have energy-saving and emission-reduction, effectively control the characteristics of the generation of pollutent; The device that maximizes has bigger throughput, higher energy end-use performance, and better economic benefit, the generation of pollutent still less and discharging help the Iron industry Sustainable development.

Description of drawings

Fig. 1 is the schema of the high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction machinery.Wherein, fusion reducing furnace and pre-reducing furnace crude fuel bunker 1, fusion reducing furnace feeding system adhesive tape conveyor 2, fusion reducing furnace top charging device (containing low temperature pressing gas furnace roof air cooling equipment) 3, fusion reducing furnace top distributing gear (containing fan-shaped heat insulation valve, water-cooled trip valve) 4, fusion reducing furnace (containing the upper and lower exhaust outlet of air-supply bustle pipe, band coal spouting gun and air-supply arrangement, oxygen coal spray gun, multifunction spray gun, the iron notch of band volume damper) 5, coal gas high-temperature trip valve 6, high-temperature cyclone dust extractor and stove dirt recovery injection system 7, pre-reducing furnace feeding system adhesive tape conveyor 8, pre-reducing furnace top charging and distribution device 9, pre-reducing furnace (containing pre-reducing furnace discharge system, bin stock system, haul system) 10, fusion reducing furnace gas blower 11, high-blast-temperature hot-blast stove 12, pulverized coal preparation and oxygen-enriched coal spray system 13, sweetening agent preparation and injection system 14, slag iron treatment system 15, pre-reducing furnace coal gas heat exchanger 16, pre-reducing furnace cool off with S in the coal gas and CO ₂Remove device 17, pre-reducing furnace cools off with circulating gas press 18, coal gas tornado dust collector 19, coal gas heating and cooling device 20, gas dry method pocket type dust-removal system 21, low temperature pressing gas CO ₂Remove device and furnace roof air cooling system 22, stock gas pressure regulating device 23, coal gas differential pressure power generation device (TRT) 24, coal gas cogeneration system 25, fuel with semicoke preparation facilities and gas pressure system 26, oxygen and nitrogen supply (NS) system 27, agglomerate production and supply system 28, pellet production and supply system 29, stock yard and auxiliary material supply system 30.

Fig. 2 is the synoptic diagram of the utility model pre-reducing furnace (containing the pre-reducing furnace discharge system) 10.

Fig. 3 is the synoptic diagram of the fusion reducing furnace (containing the upper and lower exhaust outlet of air-supply bustle pipe, band coal spouting gun and air-supply arrangement, oxygen coal spray gun, multifunction spray gun, the iron notch of band volume damper) 5 of the utility model.

Embodiment

High wind-warm syndrome swirl injection disturbance melting and reducing and prereduction device by the utility model builds up must pass through baker and start-up of the furnace.The main effect of baker is the moisture of removing lentamente in the inner lining of furnace, improves the consolidation strength of furnace lining.Baker wants strictness to be undertaken by drying out curve and throat temperature should not be above 400 ℃.Start-up of the furnace is carried out with reference to the iron-smelting blast furnace with the cupola well diameter; Pack furnace charge to furnace bosh top in the pre-reducing furnace 10 this moment, logical steam and nitrogen, and the open valve that looses, system draws coal gas operation with reference blast furnace ironmaking and carries out; When the wind-warm syndrome of hotblast stove 12 reaches more than 800 ℃, when the working of a furnace phases out into the melting and reducing working order, will there be some amount slag and molten iron in the cupola well of fusion reducing furnace 5; When the throat temperature of fusion reducing furnace 5 reaches 600 ℃; Be stored in the iron-bearing material of fusion reducing furnace and pre-reducing furnace crude fuel bunker 1; Through adhesive tape conveyor 8; Pack into by reduction shaft furnace top loading equipment 9 and distributor chute thereof, and progressively reach the regulation stockline position, furnace throat place of pre-reducing furnace 10.Under the normal circumstances, when stockline is lower than specified altitude, begins to feed and, furnace charge is evenly arranged in pre-reducing furnace 10, on the furnace throat surface with the distributor chute of top loading equipment 9.Furnace charge relies on gravity to move from top to bottom and high temperature reduction coal gas from bottom to top carries out heat exchange, and behind the shaft and furnace bosh operation of furnace charge through pre-reducing furnace 10, can carry out preheating and reduction respectively to furnace charge; Furnace charge volume after the reduction reduces, and during through pre-reducing furnace 10 bosh, with low temperature coal gas furnace charge is cooled off; Get into the cupola well material discharge region of pre-reducing furnace 10 through cooled furnace charge.Be provided with in the bottom, bosh area of pre-reducing furnace 10 and smash glassware, nitrogen big gun in order to the mediation blanking channel; Be provided with fork-shaped shutting off valve, quadrant valve, threeway material distributing valve, coal gas seal valve at the crucible zone of pre-reducing furnace 10 and be used for coal gas sealing in discharge and the stove; Wherein the reducing gas of pre-reducing furnace 10 uses is about 950 ℃ of high temperature reduction coal gas of being derived by the gas export control of fusion reducing furnace 5.Get into the furnace bosh district air intake endless belt of pre-reducing furnace 10 behind high temperature reduction coal gas process coal gas high-temperature trip valve 6, high-temperature cyclone dust extractor 7, heating gas pipeline, the gas entry, regional through the furnace bosh that the even many little blast inlet that is provided with of annulus belt area gets into pre-reducing furnace 10.Little blast inlet medullary ray is to become 45～60 ° of angles to arrange downwards along the furnace bosh cross-section radial of pre-reducing furnace 10 and with horizontal plane, and little blast inlet can be shapes such as circular, square, rectangle.After high temperature reduction coal gas gets into prereduction; With at first the bosh top furnace charge of pre-reducing furnace 10 being reduced; The circuitous then furnace charge that upwards gets into furnace bosh, shaft, furnace throat and the decline of pre-reducing furnace 10 carries out transmission of heat by convection and reduction; Make the reduction zone temperature of furnace charge remain on 900 ℃, indirect reduction optimal temperature scope ^{[note 2]}And the throat temperature that makes pre-reducing furnace 10 is controlled at 200 ℃, and the top pressure of pre-reducing furnace 10 is progressively brought up to pressure 0.2MPa by normal pressure 0.03MPa.Wherein, from middle and upper part, the bosh area extension coal gas of pre-reducing furnace 10, be used for the furnace charge cooling zone coal gas circulation of pre-reducing furnace 10.This part gas temperature is about 550 ℃, and high temperature rough gas in this is introduced coal gas heat exchanger 16, and with inlet end 23, about 100 ℃ of low temperature purified gas carry out heat exchange, and the middle temperature purified gas that makes the purified gas output temperature reach 350 ℃ is used for hotblast stove 12 and burns stove; The raw gas that is come out by heat exchanger 16 passes through the system that removes, the CO that further dedusting gets into sulphur in the coal gas circulation ₂After transformation absorption and the gathering system 17, through gas compressor 18, cool off furnace charge the bottom, bosh area that gets into pre-reducing furnace 10; And with the semicoke coal gas that produces in semicoke preparation facilities and the gas pressure system 26, the gas compressor pressurization through 26 also adds the pre-reducing furnace 10 cooling zone coal gas recycle systems, helps the bottom furnace charge cooling of pre-reducing furnace 10 and the reduction of top furnace charge; Add part semicoke coal gas in the bottom of pre-reducing furnace 10, to improve the reductant concentration of reducing gas; The reducing gas composition of pre-reducing furnace 10, its volume percent is: CO 38%, CO ₂5.5%, H ₂7.5%, CH ₄3%, N ₂46%; After the coal gas process dedusting through pre-reducing furnace 10, caloric power of gas is about 3500～4000kJ/m ³

During pre-reducing furnace 10 discharges, the temperature in prereduction ore deposit is 120 ℃.Furnace charge total residence time in pre-reducing furnace 10 is 6 hours.The degree of metalization of pre-reducing furnace 10 exit furnace charges is 50%.

According to the requirement of raw material variety and the throughput coupling requirement of pre-reducing furnace 10, each fusion reducing furnace 5 can be provided with 2 pre-reducing furnaces 10.

The furnace charge of being discharged by the cupola well of pre-reducing furnace 10 and discharge system is through adapting pipe, seal valve, material-storage jar and weighing device, equal entering bin stock systems such as pressure and purge valve, fan-shaped blow-off valve; Form the haul system through weighing funnel, materials flow gate, adhesive tape conveyor and electric control gear again; Furnace charge is transported on the fusion reducing furnace feeding system adhesive tape conveyor 2; Again by feeding system adhesive tape conveyor 2; Be transported in the loading device 3 of furnace roof of fusion reducing furnace 5, press operational order to furnace charge.

The trip valve of the top distributing gear 4 of fusion reducing furnace 5 is opened, ironmaking with fuel, iron-bearing material, flux by proportioning, weigh, batch, through the top loading equipment 3 of fusion reducing furnace 5, the distributor chute of top distributing gear 4 is packed into; Furnace charge batch can be by per hour being provided with for 7 times.The furnace roof sector gate of top distributing gear 4 was opened before every batch of material added, and the top distributor chute is dispensed onto furnace charge by operational order the specified location of crucible zone; Adopt low temperature pressing gas CO ₂Remove the coal gas of device and furnace roof air cooling system 22, it is too high to be unlikely to temperature with protection top distributing gear 4, satisfies the requirement of 350 ℃ of equipment works better; The fuel of packing into from furnace roof is the semicoke that is provided by semicoke preparation facilities 26, should satisfy as the needed reductive agent quantity of the direct reduction of this charge ferriferous oxide; The various iron-smelting raw materials that iron-bearing material should be an exsiccant, ferrous grade is high, harmful element is low of packing into from furnace roof: the natural ore deposit of the pellet of the agglomerate of agglomerate production and supply system 28, pellet production and supply system 29, stock yard and auxiliary material supply system 30 and flux etc.; The quantity of the flux of packing into from furnace roof should satisfy this batch of material and directly reduce the slag that the back generates, and its basicity of slag and composition reach smelts required requirement, and the sulfur content of hot metal that satisfies generation meets the requirements.

The tuyere zone of fusion reducing furnace 5 is provided with the two rows air port, and the air port links to each other with air-supply arrangement and air-supply bustle pipe, and the hot-blast pressure of fusion reducing furnace 5 is 0.34MPa; The wind pushing temperature of high-blast-temperature hot-blast stove 12 is 1300 ℃; By the oxygen that oxygen and nitrogen supply (NS) system 27 provide, make that oxygen concentration reaches 4% in the air-supply; By the coal dust that pulverized coal preparation and oxygen-enriched coal spray system 13 provide, be connected on the pulverized coal gun that is provided with on the blowpipe; Through two exhaust outlets of fusion reducing furnace 5, the coal dust amount that sprays into can reach 160kg/t; The quantity of exhaust outlet up and down of fusion reducing furnace 5 can equate or be unequal that the medullary ray of every exhaust outlet still will be evenly distributed on the circumference separately on same absolute altitude; The following exhaust outlet air quantity of fusion reducing furnace 5 can be regulated air quantity through the refractory materials stopper device on the air-supply arrangement arm; On the refractory materials of tuyere zone and cooling apparatus, be provided with the many places thermopair; The air port infrared rays all is installed on the arm of each air-supply arrangement is spied on appearance, can working of a furnace camera picture in time be sent to the watch-keeping cubicle.

The last exhaust outlet of fusion reducing furnace 5 mainly is that the furnace charge that adds cupola well is carried out preheating, part prereduction, makes furnace charge generate soft nascent slag and the sponge iron that melts state.The following exhaust outlet of fusion reducing furnace 5 mainly is to provide direct reduction required heat energy to becoming the soft shape furnace charge that melts, and it is pushed in the slag iron liquation, through liquid motion modes such as floating, upset, eddy flows, with the disturbance of oxygen coal lance ejection ^{[note 1]}Under the acting in conjunction of combustion reactions, on slag, iron liquid interface, accomplish the direct reduction reactor process, form slag and molten iron.

Oxygen coal spray gun through regulating fusion reducing furnace 5 is in the angle of horizontal projection direction; The recycle stream that forms behind high wind-warm syndrome oxygen-rich air that spray in the combustion gases that make oxygen coal lance ejection eddy flow and following air port and the coal dust firing crosses, thereby to the local gas generation disturbance of circulation ^{[note 1]}, form local eddy currents, will produce the high temperature more than 2500 ℃ in the vortex cavity; The decomposition of coal will take place in this regional area, the gasification of carbon, and produce a large amount of reducing gas as media; Make the direct reduction reactor speed sharp increase of contacted furnace charge to be restored with it, form slag and molten iron, the hole that after furnace charge edge reduction reaction, forms; With the contact area of further promoting furnace charge and slag iron, quicken direct reduction reactor and desulphurization reaction and carry out.

For abundant heat is arranged in the cupola well that makes fusion reducing furnace 5; Can add excess of fuel during operation, particularly at the blow-on initial stage, the semicoke that has neither part nor lot in gasification reaction will be trapped in the cupola well; Form dead stock column; The edge is influenced by air blast and gasifies, and there is a spike at the center, and dead stock column is immersed in the molten iron and suspends.In production operation, dead stock column can play shock absorption to the furnace charge of furnace roof spreading, reduces the impact to bottom brick; Every batch of furnace charge will be evenly distributed on the dead stock column, and the pyritous air blast will have bigger contact area and more contact time with furnace charge, be the favourable condition that provides of reduction reaction; Dead stock column provides carbon source for the molten iron carburizing, and it is stable to keep the molten iron carbon content.Dead stock column is the semicoke particle that voidage is arranged, and enough liquid permeabilities are arranged, and can stop that when tapping a blast furnace not reducing furnace charge goes out with slag iron flow; Dead stock column is brought in constant renewal in, and its cycle is about 7～10 days.

The height of the crucible zone of fusion reducing furnace 5: the requirement that should satisfy twice amount of tapping a blast furnace and go out the quantity of slag; For effectively utilizing heat energy, also should hold in the cupola well and be no less than 3～5 batches furnace charge.Crucible zone at fusion reducing furnace 5 also is provided with oxygen coal spray gun and multi-functional injection hole: the coal dust that is provided by pulverized coal preparation and oxygen-enriched coal spray system 13 reaches the oxygen that is provided by oxygen and nitrogen supply (NS) system 27; Oxygen coal spray gun through fusion reducing furnace 5 inserts can be regulated cupola well furnace temperature, carbon, oxygen quantity and ratio; The amount of oxygen of bringing into by oxygen coal spray gun; Can account for 5% of air blast oxygen-rich concentration, the coal dust amount that is sprayed into by oxygen coal spray gun can reach 80kg/t; Can make the average oxygen concentration of air that gets in the stove reach 30%, post-combustion rate is 15% in the fusion reducing furnace 5.Can control and regulate by operational requirement.

When going into the comprehensive grade of stove ore when being Fe 58%, the stove fuel quantity iron per ton of going into of fusion reducing furnace 5 is about 650kg/t, for satisfying the carbon amount requirement of smelting, goes into stove semicoke carbon content and is not less than 83%, and the carbon content that sprays into the coal dust of fusion reducing furnace 5 is 65%; Molten iron air blast air quantity per ton is about 1100Nm ³/ t, when fusion reducing furnace 5 go into the average oxygen concentration of air in the stove when reaching 30%, molten iron oxygen-consumption per ton is about 130Nm ³/ t; The coal dust amount that iron per ton sprays into is 240kg/t, can reach into 36.9% of stove total amount of fuel; Molten iron coal gas generating capacity per ton is about 1540Nm ³/ t; Fusion reducing furnace cupola well diameter is 11.5m, and the cupola well unit surface amount of tapping a blast furnace every day is about 60t/ (m ².d).

BSIETMELT ^{[note 3]}The use characteristics significant parameter is following:

Reclaim the stove dirt that injection system 7 provides by high-temperature cyclone dust extractor and stove dirt,, can increase this place's slag viscosity, lower cupola well furnace lining surface temperature, to improve the 5 brick lining life-spans of fusion reducing furnace through inserting the multifunction spray gun of fusion reducing furnace 5; By the medium that sweetening agent preparation and injection system 14 provide, the multifunction spray gun through inserting can lower sulfur content of hot metal fast.

Divide furnace charge that charge adds under the effect of high temperature reduction gas by fusion reducing furnace 5 furnace roofs, through preheating, part prereduction, soft melting, with molten slag in the cupola well with carry out iron-bath process after molten iron contacts and directly reduce generation slag and molten iron.Its recrement iron will be regularly by the iron notch deslagging with tap a blast furnace, molten iron temperature is about 1500 ℃, handles through slag iron treatment system 15, molten iron is sent to steel-making.Slag can be used for the punching out grain slag.

When the maintenance of the equipment claimed of fusion reducing furnace 5, get into the damping down state: should change fusion reducing furnace 5 furnace roofs over to atmospheric operation by the high pressure of 0.34MPa; During damping down, fusion reducing furnace 5 furnace roofs need lead to nitrogen and steam, close high-temperature cyclone dust extractor 7 preceding raw gas trip valves 6, and open fusion reducing furnace 5 stock gases and diffuse valve.When damping down, need fusion reducing furnace 5 top charging equipment trip valves cut out.

Behind the multiple wind, fusion reducing furnace 5 roof material distributings batch and air-supply air quantity slowly increase, and after progressively increasing with the air-supply total amount, should constantly increase exhaust outlet air quantity down, improve the air port blast energy; Following exhaust outlet air quantity can be regulated also through the refractory materials stopper of volume damper and this device on the air-supply arrangement arm can cut off air quantity; When air-supply total amount, roof pressure, reinforced batch when reaching normal value, make fusion reducing furnace about in the of 5 the exhaust air rate ratio get back to normal range.

For guaranteeing 5 furnace lining work-ing lifes of fusion reducing furnace, should select the refractory materials that adapts with smelting condition for use at different sites, between refractory materials and furnace shell, also be provided with cooling apparatus.Be equipped with water cooling system with high temperature air, the contacted valve of coal gas and tuyere device.

Fusion reducing furnace 5 furnace roofs are provided with radar and survey charge level and infrared pick-up appearance; The air port belly pipe is provided with infrared rays and spies on appearance; Can use in the camera head Real Time Observation stove and change.

Coal gas of high temperature by the discharge of fusion reducing furnace 5 furnace roof delivery lines; Carry out thick dedusting through high-temperature cyclone dust extractor 7, can get into tornado dust collector 19 with behind its chemical energy and the waste heat energy Preliminary Exploitation through pre-reducing furnace 10; Coal gas heating and cooling device 20, gas dry method pocket type dust-removal system 21 are carried out smart dedusting; Through stock gas pressure regulating device 23 regulation system pressure or through coal gas differential pressure power generation device (TRT) 24, its pressure can be reclaimed, then part coal gas is supplied with hotblast stove 12 and burn stove; Residual gas is supplied with cogeneration system 25 and is used, for the gas blower 11 of fusion reducing furnace provides power.Gas blower 11 by fusion reducing furnace provides high pressure cold wind to hotblast stove 12, and on cold air duct, passes through the oxygen valve group, adds part oxygen by operational requirement.This part oxygen will be provided by oxygen and nitrogen supply (NS) system 27.

The high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction machinery and method are applicable to that metallurgical technology field is to various metallurgical technology flow processs; Various operating modes can both flexible adaptation; Particularly; In the face of the deficient day by day situation of coking coal resource, the non-blast furnace ironmaking technology is the inexorable trend of ferrous metallurgy Sustainable development.

The high wind-warm syndrome swirl injection of the utility model disturbance melting and reducing and prereduction machinery and method have multiple embodiments, and the accompanying drawing explanation usefulness that only lays down a definition not is the restriction to the utility model.Any the utility model mentality of designing that do not break away from does to the utility model that unsubstantiality changes, and all still belongs to the scope of the utility model.

Note 1: disturbance one speech is widely used in the science and technology in modern times, and its basic meaning is: the various operational conditionss in the production system receive ectocine, and various influence factors are often to change; Safeguard that production system normally carries out towards intended target; Must coordinate the influence of the mutual relationship and the extraneous factor of each production factors; Direction and scope according to scientific forecasting are carried out, these in succession the production system formed of incident can carry out in the self-regulating running balance a kind of; If one of them actor can not adapt to this disturbance, then running balance is destroyed, and begins a new event procedure.This event procedure possibly make a certain actor hold the variation of can't stand excessive energy and matter taking place, and with the energy that discharges, acts on next actor, makes it that new variation take place; Therefore the variation of extraneous factor will influence the operation of production system; Make system produce a kind of fluctuation in normal range; It often has certain rules to follow; And have predictability, and the variation of this influence factor to external world of production system is called as disturbance (Perturbation), and disturbance will act on the main body person who causes the incident behavior.For fluid reaction medium, the factor that is exactly externally certain sparging gases is disturbed down, and segment fluid flow departs from proper flow track and reaction trajectory, i.e. " derailing "; Utilize the air-flow of this part derailing, increase the medium touch opportunity, carry out with accelerated reaction.

Note 2: the middle temperature reduction zone of pre-reducing furnace furnace charge, definite foundation that the indirect reduction optimal temperature is 850～950 ℃:

Press the ferriferous oxide reduction thermodynamics, with reducing gas CO, H ₂Reduction is called indirect reduction; Reduction temperature is during greater than 570 ℃, and the high price ferriferous oxide reduces to the low price ferriferous oxide successively; When greater than 810 ℃, H ₂Reducing power much larger than the reducing power of CO; For accelerating reduction rate, performance H ₂Reductive action, battery limit (BL) under the middle temperature reduction zone of pre-reducing furnace furnace charge is confirmed as 850 ℃.Improve reduction temperature and help accelerating reduction rate, according to knowhow, when reduction temperature surpasses 1000 ℃; Some iron-smelting furnace charge begins softening adhesion; Be unfavorable for production operation, battery limit (BL) general requirement on the middle temperature reduction zone of pre-reducing furnace furnace charge should be lower than 50～100 ℃ of ore softening temperatures.Because iron-smelting raw material is various in style, can not give an example one by one, with a representational iron-smelting raw material reductibility testing data above problem is described at present.

The test of prereduced burden material metallurgical performance

Superfluxed sinter and acid burden material (pellet and lump ore) are reasonably combined, have become the basic model that the stove burden structure is gone in ironmaking; Through the test of furnace charge metallurgical performance, the technical economical analysis for production operation provides theoretical foundation.The battery of tests data of giving an example are following:

(1) agglomerate chemical ingredients

Agglomerate chemical component table 1

Test number	TFe	FeO	CaO	S	SiO 2	MgO	CaO/SiO 2
								SH-1.4	55.90	10.56	9.45	0.028	6.96	3.06	1.358
SH-1.5	55.70	10.74	10.30	0.024	6.81	2.85	1.512
								SH-1.6	54.60	10.92	10.90	0.024	6.96	3.17	1.566
SH-1.7	53.60	9.84	11.50	0.035	6.86	3.24	1.676
								SH-1.8	53.60	9.84	12.50	0.030	6.86	3.02	1.822
SH-1.9	53.40	9.70	12.40	0.031	6.66	3.02	1.862
								SH-2.0	52.10	9.02	13.85	0.047	6.96	3.15	1.990
SH-2.1	50.60	8.62	14.30	0.041	6.76	3.38	2.115

(2) reductibility and low-temperature reduction disintegration can measuring methods

Reductibility: ore reduction method for testing performance: reductibility is meant that a kind of of complexity who from iron ore, gets rid of with iron phase bonded oxygen with reducing gas measures, and is most important metallurgical performance index.

Reduction degree: with the ferric iron state is that benchmark (supposes that promptly iron in the iron ore is all with Fe ₂O ₃Form exists, and these Fe ₂O ₃In oxygen can be regarded as 100%), the deoxidation degree that reduction is reached behind the certain hour is represented with mass percent.

Adopt standard GB/T13241-91 method of inspection, verifying attachment is identical with ISO-4695, (being applicable to the detection of ore, agglomerate, pellet) sample granularity 10～12.5mm; Weight 500g; 900 ℃ of reduction temperatures, reducing gas flow 15NL/min, composition are (CO 30%+N ₂70%), recovery time 180min is calculated as follows reduction degree.

$\mathrm{RI}=(\frac{0.11\mathrm{FeO}}{0.43\mathrm{TFe}}+\frac{m_1-m_t}{0.43\mathrm{TFe}}\×100)\×100\%$

In the formula: m1, mt are respectively before the reduction beginning and the sample weight (g) behind the reduction 180min.

The ore reduction performance is good and poor, and RI representes with reduction degree: RI＜60% o'clock is poor: RI >=65% o'clock is for well.

Low temperature reduction degradation index: adopt national standard GB/T13242-91 testing apparatus and TP, identical with ISO-4696.Sample granularity 10～12.5mm, weight 500g, 500 ℃ of reduction temperatures, reducing gas flow 15NL/min, reducing gas composition are (20%CO+20%CO ₂+ 60%N ₂), recovery time 60min, the sample after the reduction are placed on rotary drum and (in the Φ 130 * 200mm), rotate 10min with rotating speed 30rpm, test.Sample after the check sieves with the 0.5mm square hole sieve with 6.3,3.15, with+6.3mm ,+3.15mm, the weight percentage of-0.5mm is as the low-temperature reduction disintegration index.Respectively with RDI+6.3, RDI+3.15, RDI-0.5 representes.

(3) different alkalinity sintered ore reductibilities and low-temperature reduction disintegration ability

Different alkalinity sintered ore reductibilities and low-temperature reduction disintegration can tables 2

RVI-rate of reduction index; With the ferric iron is benchmark, and the rate of reduction when the O/Fe atomic ratio is 0.9 (being equivalent to reduction degree is 40%) is represented with the mass percent PM.

(4) pellet chemical ingredients

Pellet chemical component table 3

Test number	TFe	FeO	CaO	SiO 2	MgO	CaO/SiO 2
							QT-0.12	65.26	0.72	0.48	3.99	1.09	0.12

(5) the pellet metallurgical performance is measured

The pellet metallurgical performance is measured table 4

The pellet ore reduction swellability performance: free expansion in the isothermal reduction process, the relative value of volume growth is represented with percent by volume before and after the reduction.Adopt standard GB/T13240-91 testing apparatus and TP.Pellet sample granularity 10～12.5mm takes out 18 balls at random from sample, with the diameter of 3 different axial each balls of measurement, calculate the mean diameter and the volume of each protocorm.Sample is put into the reduction swellability porose disc, divide 3 layers of layout, every layer of 6 ball make it can free expansion in reduction process; Put into reduction reaction furnace, reducing gas flow 15NL/min, reducing gas composition are (30%CO+70%N ₂), under 900 ℃ of constant temperature of reduction temperature, recovery time 60min; After the sample reduction, at N ₂Be cooled to room temperature under the protection; Take out by the method for measuring protocorm and measure the diameter after each ball expands, calculate the mean diameter and the volume of each ball.Mean diameter and volume according to before and after the reduction swellability calculate the volumetric expansion and the polar expansion of pellet.

(6) under the proportioning of different alkalinity sintered ores and pellet, the test of the melt-dropping property of comprehensive furnace charge

The melt-dropping property TP: sample granularity 10～12.5mm, with the sample plumbago crucible of packing into, the high 62 ± 2mm of the bed of material; Crucible bottom and sample upper surface are put 15g and 20g coke respectively; Crucible is put into the molten drop stove; Loading is 9.8N/cm ²At reducing atmosphere (CO 30%+N ₂70%) under, through reducing gas flow 15NL/min; During from 400 ℃, begin ventilation; Heating schedule is set:＜900 ℃ of 8 ℃/min,＞900 ℃ of 4～5 ℃/min; Significant parameter has:

T _10%, T _50%: represent that respectively volume of sample shrinks 10% o'clock temperature, to represent softening beginning temperature; The expression volume of sample shrinks 50% o'clock temperature, to represent softening finishing temperature;

T _s, T _d: be respectively sample and begin melt temperature and begin to drip temperature;

Δ P _m: the maximum differential pressure during the sample molten state;

Δ P _s: the pressure reduction when sample begins fusion

Δ T _Soft: softening temperature is interval;

Δ H: fusion zone thickness; Δ H=Δ H _d-Δ H _s

Δ T: droplet temperature is interval; Δ T=T _d-T _s

S: melt-dropping property overall characteristic value; S=(Δ P _m-Δ P _s) * Δ T

The melt-dropping property table 5 of comprehensive furnace charge

The melt-dropping property of comprehensive furnace charge

(7) conclusion (of pressure testing):

1) visible by table 2, this test, different alkalinity sintered ore reductibilities and low-temperature reduction disintegration can have notable difference.General requirement agglomerate (RI>=65%, RDI _{+ 3.15}>=60%), sample SH-1.7 and SH-1.9, corresponding basicity is 1.7～1.9 o'clock, agglomerate reductibility and low-temperature reduction disintegration can be good, and can keep optimum regime, should be best use range;

2) visible by table 4, this test can be found out, general requirement pellet (TFe>=63%, RI>=65%, RDI _-3.15≤15%, RSI≤17%), this pellet ferrous grade is higher, but reducing property is lower, and low temperature reduction degradation is few, and cubical expansivity is not high; This pellet has metallurgical performance preferably;

3) visible by table 5, this test, the agglomerate of corresponding different basicity and pellet can have multiple proportioning, and (TFe 53.6%, CaO/SiO with SH-1.7 in these proportionings ₂1.676), allocate 27.08% pellet into; (TFe 53.6%, CaO/SiO for SH-1.8 ₂1.822), allocate 36.19% pellet into; (TFe 53.4%, CaO/SiO for SH-1.9 ₂1.862), allocate 37.59% pellet into; Be best proportioning more than, be characterized in: though comprehensive furnace charge has the lower slightly and interval slightly wide deficiency of softening temperature of beginning softening temperature; But comprehensive furnace charge droplet temperature interval is narrower, the fusion zone thinner thickness, and melt-dropping property overall characteristic value is lower; The comprehensive furnace charge of this proportioning has metallurgical performance preferably than single variety furnace charge;

4) visible by table 5, this test, (TFe 55.9%, CaO/SiO to use SH-1.4 ₂1.358) during 100% agglomerate, the softening beginning temperature (T of comprehensive furnace charge _10%) be 1101 ℃, softening finishing temperature (T _50%) be 1233 ℃; Use the SH-2.1 sample, when allocating 100% pellet into, the softening beginning temperature (T of comprehensive furnace charge _10%) be 1032 ℃, softening finishing temperature (T _50%) be 1207 ℃; This test, the softening beginning TR of various comprehensive furnace charges is 1032～1112 ℃; The softening finishing temperature scope of various comprehensive furnace charges is 1207～1278 ℃:

5) for preventing furnace charge adhesion in pre-reducing furnace, the pre-reducing furnace processing temperature should be lower than 50～100 ℃ of ore softening temperatures; In order to accelerate reduction rate, enhance productivity; And make the requirement of satisfying multiple charge composition as much as possible, test basis is arranged being defined as 950 ℃ on interval 850～950 ℃ of the reduction temperature of the pre-reducing furnace of BSIETMELT.

6) meet the raw material of blast furnace ironmaking production requirement, all can be used as BSIETMELT and smelt and use raw material;

7) BSIETMELT smelts and use raw material, should adopt superfluxed sinter and acid burden material (pellet and lump ore) reasonably combined, should carry out the melt-dropping property of comprehensive furnace charge and tests going into the stokehold, to obtain the technical economic benefit of the best;

Note 3: BSIETMELT (BSIETMELT in short)

Full name is BEIJING SHOUGANG INTERNATIONAL ENGINEERING TECHNOLOGYCO., and LTD MELT implied meaning is Beijing Shougang International Engineering Technology Co., Ltd's smelting device and method.

Claims (9)

1. one kind high wind-warm syndrome swirl injection disturbance melting and reducing and prereduction machinery is characterized in that: comprising: feed circuit, top charging and cloth system, fusion reducing furnace, furnace roof coal gas of high temperature system, pre-reducing furnace, semicoke coal gas recycling system, pulverized coal preparation and coal injection system, iron melt desulfurizing agent preparation and blowing device, oxygen and nitrogen supply (NS) system, slag iron treatment system, high-blast-temperature hot-blast stove, fusion reducing furnace gas blower, stock gas dedusting and recovery system, coal gas cogeneration system; Feed circuit links to each other with fusion reducing furnace and pre-reducing furnace respectively through top charging and distribution device; Furnace roof coal gas of high temperature system links to each other with fusion reducing furnace through the coal gas of high temperature pipeline; Pre-reducing furnace links to each other with furnace roof coal gas of high temperature system through the coal gas of high temperature pipeline; Semicoke coal gas pressurization recycling system links to each other with pre-reducing furnace through pipeline; Pulverized coal preparation and coal injection system link to each other with fusion reducing furnace through pipeline, and iron melt desulfurizing agent preparation and blowing device link to each other with fusion reducing furnace through pipeline, and oxygen links to each other with fusion reducing furnace through pipeline with the nitrogen supply (NS) system; Slag iron treatment system links to each other with fusion reducing furnace through the slag iron runner; High-blast-temperature hot-blast stove links to each other with fusion reducing furnace through hot air duct, and the fusion reducing furnace gas blower links to each other with high-blast-temperature hot-blast stove through cold air duct, and the stock gas dedusting links to each other with pre-reducing furnace through gas line with recovery system; The coal gas cogeneration system links to each other with stock gas dedusting and recovery system through gas line, and the fusion reducing furnace gas blower links to each other with the coal gas cogeneration system through the high voltage supply cable.

2. device according to claim 1 is characterized in that: fusion reducing furnace comprises melting and reducing furnace body, stock gas delivery line, air-supply bustle pipe, air-supply arrangement, upward spout, dust recycle device, iron mouth frame, the air port infrared rays of exhaust outlet, following exhaust outlet, stopper formula volume adjusting apparatus, oxygen coal spray gun and multifunction spray gun are spied on appearance, the furnace roof radar is surveyed charge level appearance, furnace roof infrared pick-up appearance and thermal technology's proofing unit; The stock gas delivery line links to each other with the melting and reducing furnace body through pipeline welding; The air-supply bustle pipe links to each other with high-blast-temperature hot-blast stove through pipeline; Air-supply arrangement links to each other with the air-supply bustle pipe with bolt through flange; Last row, following exhaust outlet link to each other with the melting and reducing furnace body with bolt through flange, and the melting and reducing furnace body links to each other with top charging and distribution device through lip ring; Stopper formula volume adjusting apparatus links to each other with following exhaust outlet through air-supply arrangement; The spout of oxygen coal spray gun and multifunction spray gun links to each other with the melting and reducing furnace body with bolt through flange; The dust recycle device links to each other with multifunction spray gun with flange through pipeline; Iron mouth frame links to each other with the melting and reducing furnace body through welding; The air port infrared rays is spied on appearance and is linked to each other with air-supply arrangement with pipeline through flange, and the furnace roof radar is surveyed charge level appearance, furnace roof infrared pick-up appearance and thermal technology's proofing unit and linked to each other with the melting and reducing furnace body with pipeline through flange.

3. device according to claim 1 is characterized in that: the melting and reducing furnace body is made up of furnace bottom, cupola well, tuyere zone, shaft, burner, furnace roof shrouding, lip ring, furnace top flange, refractory lining, cooling apparatus, furnace shell; Furnace bottom links to each other with the nfrastructure and the drop-bottom of shaft furnace, is cylindrical or truncated cone-shaped, and the cooling apparatus pipeline is connected with the furnace shell base plate with welding process; Cupola well is above furnace bottom, and profile is cylindrical or truncated cone-shaped, and the center is a cylindrical space, and cupola well is provided with iron notch, and cupola well top also is provided with the spout that oxygen coal spray gun and multifunction spray gun are installed, and the cooling apparatus pipeline is connected with furnace bottom place furnace shell with welding process; Tuyere zone is above cupola well, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, and tuyere zone is provided with the two rows air port, and the cooling apparatus pipeline is connected with cupola well place furnace shell with welding process; Shaft is above tuyere zone, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, and the cooling apparatus pipeline is connected with tuyere zone place furnace shell with welding process; Burner is above shaft, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, and burner is provided with the stock gas delivery line, and the cooling apparatus pipeline is connected with shaft place furnace shell with welding process; The furnace roof shrouding is above burner, and profile is cylindrical, and the center is a cylindrical space; The cooling apparatus pipeline is connected with burner place furnace shell with welding process; Lip ring is connected with furnace roof shrouding place furnace shell with welding process above the furnace roof shrouding; Furnace top flange links to each other with lip ring through bolt connection mode above lip ring.

4. device according to claim 1 is characterized in that: pre-reducing furnace comprises that pre-reducing furnace body, stock gas delivery line, distributor chute access opening, prereduced burden material cool off with circulating gas system, discharge system, bin stock system, haul system; The stock gas delivery line links to each other with the pre-reducing furnace body through pipeline welding; The distributor chute access opening links to each other with the pre-reducing furnace body through welding; The prereduced burden material cooling links to each other with the pre-reducing furnace body through the gas line welding with the circulating gas system; Discharge system links to each other with the pre-reducing furnace body through welding, and the bin stock system links to each other with the valve of pre-reducing furnace discharge system through bellow expander connecting tube welding process, and the haul system links to each other with the bin stock system with rubber seal through chute.

5. device according to claim 4 is characterized in that: the pre-reducing furnace body is made up of furnace top flange, lip ring, furnace roof shrouding, burner, gas export control, distributor chute access opening, furnace throat, shaft, furnace bosh, bosh, cupola well, refractory lining and furnace shell; Furnace top flange links to each other with lip ring through bolt connection mode; Lip ring is connected with furnace roof shrouding place furnace shell through welding process below furnace top flange; The furnace roof shrouding is below lip ring, and profile is cylindrical, and the center is a cylindrical space, builds by laying bricks or stones and welding process is connected with burner place furnace shell through refractory lining; Burner is below the furnace roof shrouding, and burner is provided with stock gas delivery line and distributor chute access opening; The burner profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with furnace throat place furnace shell through refractory lining; The stock gas delivery line is built by laying bricks or stones and welding process is connected with burner place furnace shell through refractory lining above burner; The distributor chute access opening is connected with burner place furnace shell through welding process; Furnace throat is below burner, and profile is cylindrical, and the center is a cylindrical space, builds by laying bricks or stones and welding process is connected with shaft place furnace shell through refractory lining; Shaft is below furnace throat, and profile is up-small and down-big truncated cone-shaped, and the center is up-small and down-big truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with furnace bosh place furnace shell through refractory lining; Furnace bosh is provided with high temperature reduction gas entry pipe below shaft, build by laying bricks or stones and welding process links to each other with high-temperature cyclone dust extractor through refractory lining; The furnace bosh profile is cylindrical; The centre is provided with the hollow ring casing, and ring casing is built by laying bricks or stones through refractory lining and welding process links to each other with high temperature reduction gas entry pipe, and the ring casing bottom evenly is provided with a plurality of ducts; The duct medullary ray is arranged along pre-reducing furnace furnace bosh cross-section radial; Duct medullary ray and horizontal plane are 45～60 ° of angles downwards, and the duct is circular, square or rectangle, and the duct communicates with the central cylindrical space; Furnace bosh is built by laying bricks or stones through refractory lining and welding process is connected with bosh place furnace shell; Bosh is below furnace bosh, and profile is up big and down small truncated cone-shaped, and the center is up big and down small truncated cone-shaped space, builds by laying bricks or stones and welding process is connected with cupola well place furnace shell through refractory lining; The bosh middle and upper part is provided with the cooling of bosh furnace charge and uses the circulating gas fairlead, and the bosh bottom is provided with the circulating gas inlet tube, and each gas line links to each other with bosh place furnace shell through welding; Be provided with the access mouth of pipe of smashing glassware, nitrogen big gun in the middle and lower part, bosh area, link to each other with bosh place furnace shell through flange and pipeline welding mode; Cupola well is below bosh, and profile is cylindrical, and the center is a cylindrical space; Cupola well section bottom is provided with discharge gate, links to each other with the valve of discharge system through pipeline welding mode and flange.

6. device according to claim 4 is characterized in that: prereduced burden material cools off with the circulating gas system by coal gas heat exchanger, low temperature purified gas input system, coal gas desulfurization device, CO ₂Transformation adsorbing and removing device, coal gas refrigeration cycle press are formed; The coal gas heat exchanger has four pipe joints; Link to each other with the import and export pipe of high and low temperature end with flange with pipeline welding respectively: the temperature end inlet tube links to each other with the bosh gas export control; The temperature end outlet pipe links to each other with coal gas desulfurization device portal pipe; The low-temperature end inlet tube links to each other with the purified gas pipeline of stock gas dedusting and recovery system, and the low-temperature end outlet pipe links to each other with the gas line of high-blast-temperature hot-blast stove system; The coal gas desulfurization device links to each other CO with flange with coal gas heat exchanger outlet pipe flange through pipeline welding ₂Transformation adsorbing and removing device links to each other with coal gas desulfurization device outlet pipe flange with flange through pipeline welding, and the gas compressor inlet tube is through pipeline welding and flange and CO ₂Transformation adsorbing and removing device outlet pipe links to each other, and the gas compressor outlet pipe links to each other with pre-reducing furnace bosh gas entry pipe with flange through pipeline welding.

7. device according to claim 4 is characterized in that: the pre-reducing furnace discharge system is formed by smashing glassware, nitrogen big gun, fork-shaped shutting off valve, quadrant valve, threeway material distributing valve, coal gas sealed butterfly valve; Smashing glassware smashes glassware access port pipeline through pipeline welding and flange with the pre-reducing furnace bosh and links to each other; The nitrogen big gun links to each other with pre-reducing furnace bosh nitrogen big gun access port pipeline through pipeline welding and flange; The fork-shaped shutting off valve links to each other with pre-reducing furnace cupola well discharge gate through pipeline welding and flange; Quadrant valve links to each other with the fork-shaped shutting off valve through pipeline welding and flange; The threeway material distributing valve links to each other with quadrant valve through pipeline welding and flange, and the coal gas sealed butterfly valve links to each other with the threeway material distributing valve through pipeline welding and flange.

8. device according to claim 4 is characterized in that: pre-reducing furnace bin stock system is by adapting pipe, upper sealing valve, material-storage jar and electronic weighting equipment thereof, all pressure and purge valve, the equal pressing system of nitrogen, fan-shaped blow-off valve, lower seal valve are formed; Adapting pipe links to each other with the coal gas sealed butterfly valve through bellow expander pipeline welding and flange; Upper sealing valve links to each other with adapting pipe through pipeline welding and flange; Material-storage jar links to each other with upper sealing valve through pipeline welding and flange; The material-storage jar electronic weighting equipment links to each other with electronic scale through pipeline welding and flange, and pressure-balance valve and purge valve link to each other with the material-storage jar housing through pipeline welding and flange, and the equal pressing system of nitrogen links to each other with pressure-balance valve through pipeline and flange; Fan-shaped blow-off valve links to each other with material-storage jar through pipeline welding and flange, and the lower seal valve links to each other with fan-shaped blow-off valve through pipeline welding and flange.

9. device according to claim 4 is characterized in that: pre-reducing furnace haul system is made up of weighing funnel, materials flow gate, adhesive tape conveyor; Weighing funnel links to each other with the lower seal valve with rubber seal through chute, and the materials flow gate links to each other with weighing funnel through pipeline welding and flange, and adhesive tape conveyor links to each other with the materials flow gate with rubber seal through chute.

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