CN2310768Y

CN2310768Y - Direct steelmaking connection device for blast furnace

Info

Publication number: CN2310768Y
Application number: CN 97227255
Authority: CN
Inventors: 李安宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-26
Filing date: 1997-09-26
Publication date: 1999-03-17
Anticipated expiration: 2007-09-26

Abstract

The utility model discloses a connection device used for improving the furnace body structure of a blast furnace, which is suitable for a main body frame structure blast furnace and converts the main body frame structure blast furnace into blast furnace direct steelmaking. An upper opening of the upper segment and a lower opening of the lower segment of the utility model are used for hermetically jointing with the furnace body above the slag hole of the blast furnace and below the air outlet of the blast furnace respectively. An upper and a lower cavities are communicated with a gas conduit, the lower cavity is provided with a muzzle which provides blowing powder or an oxygen supply muzzle, so the utility model can implement the direct steelmaking for the blast furnace liquid iron after the liquid iron flows into the lower cavity through a flat hopper so as to improve the traditional production technique for steel. The utility model has the characteristics of energy saving, less pollution, high recovery rate of the metal and strong adaptability, implements the replacement of coke by coal, improves the quality of the pig iron and gives full play to the multifunction of the blast furnace. In addition, the utility model also changes the traditional technique concept of people.

Description

The coupling device of blast furnace direct steelmaking

The utility model relates to a kind of body of heater coupling device that is used for the blast furnace texture improvement, particularly relates to the blast furnace with main frame structure, transform the coupling device of blast furnace direct steelmaking as, belongs to the Metal smelting technical equipment.

At present, blast furnace mostly is the traditional technology equipment, can only be in order to ironmaking, furnace charge (as: agglomerate or pellet add coke) is distributed into by furnace roof, progressively descending through the shaft furnace bosh, high-pressure hot wind is blown into from the air port, cause stove inner high voltage and high temperature, make iron oxide reduction, furnace charge is through lump zone, cohesive zone and dropping zone in the stove, be reduced into molten iron, fall into cupola well, slag tap via cinder notch, the iron mouth taps a blast furnace, and furnace roof goes out coal gas, and blast furnace so circulates, turnover is worked continuously repeatedly, fulfils its traditional ironmaking mission.Because people not only need the pig iron, more needing a large amount of is steel, is about to the molten iron that obtains from blast furnace is produced, further is smelted into carbon content again and is lower than 1.70% steel, usually the practice is that molten iron is transported to steelworks, goes through storing, handles, enters open hearth or converter, electric furnace refining Cheng Gang.This traditional processing technology relates to blast furnace and open hearth or converter, electric furnace two cover technical equipments, main deficiency is: energy dissipation is big, metal recovery rate is low, the dust flue dust pollutes environment, for example say: Steel Complex, ironmaking is near more apart with steelshop, although take multiple measure in the storing, the molten iron temperature of sending into steel melting furnace reduces by 200 ℃ at least, and process for making adds fuel again, waste energy, blast furnace is to the molten iron storing of steel melting furnace, oxygen blast, many places metal loss such as deslagging are big, and the rate of recovery is low, therefore, people study again, utilize blast-furnace smelting adaptability strong, smelt the many characteristics of function, can produce foundry iron, ferromanganese, ferrosilicon, and non-ferrous metal lead is also smelted out as by product.Can accomplish that so also ferric oxide is reduced into after the iron in blast furnace, control other element reduction on the one hand, create oxidizing atmosphere on the other hand in cupola well, make the impurity in molten steel decarburization and the eliminating iron, the molten iron with after the blast furnace reduction continues to be refined into steel.For this reason, need to solve, molten iron and solid coke after the blast furnace reduction disengage, and create oxidizing atmosphere in the iron bath of no coke contact, create the steel-making operational condition, just can make the blast furnace direct steelmaking.

The purpose of this utility model, be to overcome existing blast furnace and can only smelt iron the deficiency that to make steel, a kind of coupling device of blast furnace direct steelmaking is provided, make this install cupola well section under the butt joint blast-furnace tuyere suitable for reading, end opening docks the above cupola well epimere of former blast furnace cinder notch, in order to improve the blast furnace structure, make blast furnace become direct steelmaking.

The purpose of this utility model is to realize by such measure:

On the blast furnace of main frame structure, folding removes more than the former blast furnace cinder notch, and to this section body of heater below the shaft middle part, with the coupling device of a blast furnace direct steelmaking that is made of stove skin, water cooler and refractory materials, two-port is docked with improved blast furnace.The end opening of this device epimere 1 and flat funnel 3 connect and compose epicoele, epicoele has the suitable for reading of the arbitrary cross section of the butt joint following cupola well section of blast-furnace tuyere, the suitable for reading of device hypomere 4 has stove to stare at the dome-shaped structure to connect into cavity of resorption with it, cavity of resorption has the end opening in the above arbitrary cross section of butt joint blast furnace hearth cinder notch, two sections are cylindric, have rectangular cavity to be connected at epicoele with stage casing between cavity of resorption.Have two gas conduits to communicate between the upper and lower chamber, and have the gusset of reinforcement to be connected, cavity of resorption has two directly spray oxygen-blowing gun or powder supply muzzle at least, and the water cooler in each chamber is connected in blast furnace cooling system, and water cooling is provided.

The purpose of this utility model, can also take such measure to realize:

Flat mouthful of length and former blast furnace hearth equal diameters in the stage casing rectangular cavity that epicoele is connected with cavity of resorption, flat mouthful width 〉=former blast furnace iron notch diameter or be 2 times to 3 times of this diameter, flat open height 300-800mm, the flat mouthful of cooling stick filtration solid coke that width distributes and has the fire grate bar effect.

The utility model contrast prior art has following advantage:

1, but the improved blast furnace direct steelmaking of the utility model provides the molten iron temperature height, and is higher at least 200 ℃ than converter, open hearth, the steely iron water temp of prior art.

2, the improved blast furnace direct steelmaking of the utility model, the metal recovery rate height, oxygen blast purified FeO slag can continue to restore after tapping; needn't discharge, thereby the metal recovery rate raising, the flue dust of generation is recycled on blast furnace top; be beneficial to reduce and pollute, the protection environment.

3, the improved blast furnace of the utility model, purifying reaction heat energy and chemical energy can enter blast furnace top, can also recycle, the thermo-efficiency height, the energy makes full use of.

4, the improved blast furnace direct steelmaking of the utility model, because 4% carbon is in the stove internal combustion in the pig iron, this just can reduce to energy consumption per ton steel ton below the iron energy consumption, and energy-conservation new way is provided.

5, the blast furnace direct steelmaking of the utility model transformation, body of heater is water cooling, than existing open hearth, converter or electric furnace body life-span height.

6, owing to energy-conservation and molten iron directly are smelt steel, a ton steel saves burnt 40Kg, and the ton steel is saved 300 yuan of costs, with a heat size 633m ³Blast furnace reformation after two save 1.8 hundred million yuan of year benefits, if newly-built iron and steel enterprise, blast furnace direct steelmaking, the investment that can save newly-built steelworks.

7, the blast furnace of the utility model transformation can be realized briquet replacing coke, can improve iron quality, can be used as the processing of giving before making steel.

The accompanying drawing drawing is described as follows:

Fig. 1 is the diagrammatic cross-section of a kind of embodiment of the coupling device of the utility model blast furnace direct steelmaking

Fig. 2 is the sectional drawing that Fig. 1 analyses and observe along A one A

Fig. 3 is the sectional drawing that Fig. 1 analyses and observe along C-C

Fig. 4, be Fig. 2 along B to looking synoptic diagram

Below in conjunction with drawings and Examples, the utility model is described in detail:

In conjunction with Fig. 1, Fig. 2 is a kind of embodiment of coupling device of blast furnace direct steelmaking, suitable for reading and the blast furnace of being transformed of device epimere 1 docks, the body of heater of butt joint should be on the arbitrary cross section below the medullary ray of air port, the end opening of device hypomere 4 docks with a cross section of the above cupola well section of being transformed of blast furnace cinder notch, device epimere 1 is cylinder-like structure with hypomere 4, internal layer has refractory materials 7, skin has stove skin 9, there is water cooler 8 in middle level between the ectonexine, end opening and the flat funnel 3 of flat-shaped funnel shaped coke filtration of device epimere 1 connect into epicoele, suitable for reading and structure with burner hearth dome-shaped of device hypomere 4 connects into cavity of resorption, be connected with a rectangular cavity between epicoele and the cavity of resorption, the cooling stick that the fire grate bar effect of lateral distribution is arranged in the rectangular cavity, there are two gas conduits 2 to communicate up and down between two chambeies, and there is the gusset 6 of reinforcement to be connected, cavity of resorption has two powder preparation spray guns or heat supply at least, the winding-up oxygen muzzle 5 of oxygen supply, water cooler 8 and original blast-furnace cooled water system connection in each chamber, the cooling of supplying water.

The rectangular cavity that this device epicoele is connected with cavity of resorption, flat mouth length and blast furnace hearth equal diameters, flat mouthful of width and former blast furnace iron notch equal diameters, or to choose flat open height for 2 times to 3 times of this diameter according to the furnace volume size be between the 300-800mm, flat mouthful of width is evenly equipped with the cooling stick of not shown fire grate bar effect, stops solid coke to flow through.

The flat funnel 3 of this device filters the funnel shaped of coke, 38 ° of funnel inclination angle of inclined plane≤coke angle of repose.

Fig. 3 is that Fig. 1 analyses and observe sectional drawing along C-C, and chamber inner lining refractory 7 has stove skin 9 outward, and the middle level is a water cooler 8, passes through cross current between each section water cooler.

Fig. 4 be the B of Fig. 2 to view, the gas conduit between two chambeies 2 is communicated with up and down, the 5th, for powder agent, fuel or oxygen supply muzzle.

Claims

1, a kind of blast furnace reformation that is used for main frame structure is the coupling device of blast furnace direct steelmaking, it is by the stove skin, water cooler and refractory materials constitute, it is characterized in that device epimere (1) have one suitable for reading, it can connect with the arbitrary cross section of the following cupola well section of blast-furnace tuyere, device hypomere (4) has the end opening in the above arbitrary cross section of butt joint blast furnace hearth cinder notch, device epimere and hypomere are cylinder-like structure, internal layer has refractory materials (7), skin has stove skin (9), there is water cooler (8) in middle level between the ectonexine, device epimere (a 1) end opening and a flat funnel (3) connect and compose epicoele, device hypomere (4) suitable for reading with have burner hearth dome-shaped structure and connect into cavity of resorption, be connected with a rectangular cavity between epicoele and the cavity of resorption, there are two gas conduits (2) to communicate up and down between two chambeies, and having reinforcement gusset (6) to connect, cavity of resorption has two direct heatings at least, the spray oxygen-blowing gun of oxygen supply or powder supply muzzle (5), the water cooler in each chamber (8) holds system connection water supply cooling with the blast furnace cooling.

2, the coupling device of blast furnace direct steelmaking according to claim 1, it is characterized in that the rectangular cavity that is connected between described device epicoele and the cavity of resorption, its flat mouthful of length and former blast cylinder equal diameters, its flat mouthful width and former blast furnace iron notch equal diameters or be 2 times to 3 times of this diameter, choosing flat open height according to the blast furnace size is 300-800mm, flat mouthful of width has been distributed with the cooling stick of fire grate bar effect, passes through to stop solid coke.

3, the coupling device of blast furnace direct steelmaking according to claim 1 is characterized in that the shape of described flat funnel (3), 38 ° of funnel inclination angle of inclined plane≤coke angle of repose.