CN208701113U - Continuous oven is used in a kind of steel-making - Google Patents

Abstract

The utility model creation provides a kind of steel-making continuous oven, including furnace body, and the intracorporal room that smelts of the furnace includes the blanking chamber above the molten bath and molten bath of bottom；The flue and at least one unit that feeds intake being connected to blanking chamber are equipped at the top of the furnace body；Furnace body is equipped at least one molten iron pan feeding chute corresponding with fused reduction iron-smelting device tapping hole, is additionally provided at least one blowing unit；The position that molten bath is corresponded on the side wall of the furnace body is equipped at least one slag-drip opening and at least one tapping hole.The utility model creates the steel-making continuous oven provided, does not need molten iron transhipment, topples over, land occupation and construction scale of projects are greatly decreased, and the feature of environmental protection is good.

Description

Continuous oven is used in a kind of steel-making

Technical field

The invention belongs to industrial furnace technical field, more particularly, to a kind of steel-making continuous oven.

Background technique

Steelmaking process generally requires the processes such as blast furnace process, molten iron pretreatment, pneumatic steelmaking, needs to utilize after blast furnace process Molten iron is transported to converter by the means of transports such as torpedo tank car, overhead traveling crane, in transport process, it is also necessary to be taken off in specific position Sulphur, dephosphorization and the operation such as skim.The pretreatment process and transport process of this dispersion have as following drawbacks: (1) repeatedly transporting Journey makes the molten iron heat being transported be dissipated in vain, and energy consumption is high；(2) transport process needs to be equipped with special means of transport, moves Power and manpower, production efficiency is low, increases production cost；(3) transhipment and preprocessing process will cause gas and dust pollution, no Conducive to environmental protection and human health.(4) transport process can not thoroughly prevent the generation of safety accident.In addition, converter grate goes out When slag, tapping, charging plus auxiliary material, because fire door shakes from flue collector, movable fire door lifts, and internal layer flue collector can not trap cigarette Gas, uncontrollable discharge can occur for flue gas at this time, even if being equipped with environmentally friendly petticoat pipe in workshop outer layer, but usually trap ineffective, meeting Keep partial fume excessive, causes a degree of low vacancy pollution.

Summary of the invention

In view of this, the invention is intended to overcome above-mentioned defect existing in the prior art, a kind of steel-making company is proposed Continuous furnace.

In order to achieve the above objectives, the technical solution of the invention is achieved in that

A kind of steel-making continuous oven, including furnace body, the intracorporal smelting room of the furnace includes above the molten bath and molten bath of bottom Blanking chamber；The flue and at least one unit that feeds intake being connected to blanking chamber are equipped at the top of the furnace body；Furnace body is equipped at least One molten iron pan feeding chute corresponding with fused reduction iron-smelting device tapping hole is additionally provided at least one blowing unit；The furnace The position that molten bath is corresponded on the side wall of body is equipped at least one slag-drip opening and at least one tapping hole.

Further, the unit that feeds intake includes feeding port, chute, feed bin, vibrating feeder, nozzle, one in jet pipe Or it is multiple.

Further, the blowing unit includes one of bottom-blowing device, side-blown device, top blast device or a variety of, each Device includes jet pipe, spray gun, one or more in nozzle.

Further, the furnace body is arranged in fused reduction iron-smelting device downstream, using the difference in height of melt liquid level, makes to melt The molten iron of reduction iron production device tapping hole outflow flow to furnace body through pan feeding chute and smelts interior.

Further, the fused reduction iron-smelting device is blast furnace, Corex technique furnace, HIsmelt technique furnace, Finex technique Furnace, Flash Smelting Furnace, day dodge furnace or dodge iron furnace.

Compared with the existing technology, the invention has the advantage that

The continuous oven that the invention provides does not need molten iron transhipment, toppling process, relative to traditional pneumatic steelmaking vehicle Between, land occupation and construction scale of projects are greatly decreased；Meanwhile in continuous oven from the entire technical process for entering to expect blowing, system Totally-enclosed, all flue gases are handled by flue collection, and without uncontrollable discharge, the feature of environmental protection is good.

Detailed description of the invention

The attached drawing for constituting a part of the invention is used to provide to further understand the invention, present invention wound The illustrative embodiments and their description made are used to explain the present invention creation, do not constitute the improper restriction to the invention.? In attached drawing:

Fig. 1 is the structural schematic diagram of the invention；

Fig. 2 is structural schematic diagram when the invention embodiment is equipped with the double-deck flashboard feed opening.

In attached drawing: 1- furnace body；The molten bath 2-；3- blanking chamber；4- flue；5- feeds intake unit；6- molten iron pan feeding chute；7- blowing Unit；8- slag-drip opening；9- tapping hole；10- feed opening；The upper layer 11- flashboard；12- lower layer flashboard.

Specific embodiment

It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can To be combined with each other.

In the description of the invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand For the limitation to the invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result, Feature can explicitly or implicitly include one or more of the features.In the description of the invention, unless separately It is described, the meaning of " plurality " is two or more.

In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition State concrete meaning of the term in the invention.

Below with reference to embodiment come the present invention will be described in detail create.

A kind of steel-making continuous oven, including furnace body 1, the intracorporal room that smelts of the furnace includes above the molten bath 2 and molten bath of bottom Blanking chamber 3；The Hot Metal Pretreatment (desulfurization, dephosphorization, desiliconization) of traditional steelmaking process concentrates in continuous oven process for making The smelting interior progress of continuous oven provided by the invention, both improves production efficiency, in turn avoids environmental pollution.

The flue 4 and at least one unit 5 that feeds intake being connected to blanking chamber are equipped at the top of above-mentioned furnace body；Furnace body is equipped with extremely A few molten iron pan feeding chute 6 corresponding with fused reduction iron-smelting device tapping hole is additionally provided at least one blowing unit 7；Institute The position that molten bath is corresponded on the side wall of furnace body is stated equipped at least one slag-drip opening 8 and at least one tapping hole 9.It is set at the top of furnace body Set the flue being connected to blanking chamber, continuous oven whole system is closed in steelmaking process, the flue gas of generation by flue collection at Reason, avoids converter during grate, the uncontrollable discharge of flue gas and flue dust, pollution substantially reduces.

The above-mentioned unit that feeds intake includes one or more of feeding port, chute, feed bin, vibrating feeder, nozzle, jet pipe. Above-mentioned blowing unit includes one of bottom-blowing device, side-blown device, top blast device or a variety of, each device include jet pipe, It is one or more in spray gun, nozzle.

Above-mentioned furnace body, which is arranged in fused reduction iron-smelting device downstream, makes iron making by smelting reduction using the difference in height of melt liquid level The molten iron of iron device tapping hole outflow flow to furnace body through pan feeding chute and smelts interior.In general, the invention is provided continuous Furnace is arranged near the side-lower of fused reduction iron-smelting device, avoids in traditional pneumatic steelmaking process caused by the transhipment of molten iron Thermal loss and drain on manpower and material resources, reduce comprehensive energy consumption.In general, above-mentioned fused reduction iron-smelting device be blast furnace, Corex technique furnace, HIsmelt technique furnace, Finex technique furnace, Flash Smelting Furnace, day dodge furnace or dodge iron furnace.

A kind of process made steel using steel-making continuous oven in the invention is provided below:

1. charging:

The molten iron that fused reduction iron-smelting device is smelted flows into continuous oven by molten iron pan feeding chute, according to production needs, It can shift to an earlier date and be put into steel scrap in continuous oven as a part of raw material；

2. three is de-:

The desulfurization such as quick lime, fluorite, soda ash and Dephosphorising agent are added into furnace by charging device, molten iron is carried out simultaneously Dephosphorization and and desulfurization, according to smelt steel grade needs, desiliconization agent such as high basicity sinter, iron scale, iron ore can also be added Deng carrying out desiliconization to molten iron, the slag for reacting generation discharged out of the furnace by slag-drip opening；

3. blowing:

After suitable sludging flux (lime, calcined magnesite ball etc.) is added into furnace by charging device, pass through blowing device Oxygen blast in melt into molten bath makes oxygen that oxidation reaction directly occur with the molten iron of high temperature, removes the C of molten iron and other are miscellaneous Matter.When the ingredient of molten steel and temperature all reach requirement, that is, stop blowing；

4. deoxidation:

During preparing tapping, while deoxidier (such as silicomangan adds a small amount of aluminium, aluminum killed steel) progress is added Deoxidation and adjusting molten steel composition；

5. discharging:

It smelts the molten steel completed and molten steel apparatus for placing is put by molten steel outlet, slag is excluded outside furnace by slag-drip opening.Separately Outside, the flue gas generated in above process all discharges out of the furnace by flue, by subsequent flue gas processing device carry out UTILIZATION OF VESIDUAL HEAT IN, It the processing such as gathers dust.

It should be understood that the de- process of above-mentioned three is combinable to be entered in feed process, i.e., according to the needs of actual production Desulfurization, dephosphorization or desiliconization agent are added when molten iron enters molten iron pan feeding chute or during flowing, thus in the mistake of pan feeding The slag making work of most desulfurization, dephosphorization or desiliconization is completed in journey.

In addition, in the production technology of certain steel-making, it is convenient to omit deoxidation step, i.e. deoxidation operation not in continuous oven into Row carries out in molten steel apparatus for placing (such as ladle) completely；Silicomangan and aluminium (or ferro-aluminum) can also be added pre- in continuous oven Deoxidation, manganese addition iron etc. supplements deoxidation in ladle.

In an alternative embodiment, as shown in Fig. 2, the unit that feeds intake is designed as the form of feeding port, in feeding port 10 The double-deck flashboard structure of interior setting.Specifically, upper layer flashboard and lower layer's flashboard are designed as the structure type (ability that cannot be opened simultaneously Field technique personnel can according to need, and be designed as the structure type of linkage, be also possible to mutually self-locking structure type, as long as real It is both existing to open simultaneously).When lower layer's flashboard close, by upper layer flashboard open when, material be added to two laminated planks it Between intermediate bin；Later, upper layer flashboard is closed, opens lower layer's flashboard, blanking；So far, it once feeds to the indoor completion of smelting. Lower layer's flashboard is closed later, repeats to open upper layer flashboard and its postorder sequence of operations, be fed next time, added every time Doses is controllable.

It should be noted that due to intermediate bin constant volume, the amount controllable precise to be added materials avoids and adds Material is excessively very few to cause raw material proportioning stability poor, and influences product quality.In the present embodiment, since upper and lower flashboard can not be same When open, so will not to be directly circulated into smelting indoor for material, close lower layer's flashboard, just openable upper layer flashboard, it is ensured that material After filling up intermediate bin, upper layer flashboard is closed, then opens the charging of lower layer's flashboard.

The steel-making continuous oven that the invention provides does not need molten iron transhipment, toppling process, refines relative to traditional converter Steel workshop, land occupation and construction scale of projects are greatly decreased；Meanwhile in continuous oven from the entire technical process for entering to expect blowing, System totally-enclosed, all flue gases are handled by flue collection, and without uncontrollable discharge, the feature of environmental protection is good.

The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention Protection scope within.

Claims (5)

1. a kind of steel-making continuous oven, it is characterised in that: including furnace body, the furnace is intracorporal to smelt the molten bath and melt that room includes bottom Blanking chamber above pond；The flue and at least one unit that feeds intake being connected to blanking chamber are equipped at the top of the furnace body；On furnace body Equipped at least one molten iron pan feeding chute corresponding with fused reduction iron-smelting device tapping hole, it is single to be additionally provided at least one blowing Member；The position that molten bath is corresponded on the side wall of the furnace body is equipped at least one slag-drip opening and at least one tapping hole.

2. it is according to claim 1 it is a kind of steel-making use continuous oven, it is characterised in that: the unit that feeds intake include feeding port, One or more of chute, feed bin, vibrating feeder, nozzle, jet pipe.

3. a kind of steel-making continuous oven according to claim 1, it is characterised in that: the blowing unit includes bottom blowing dress It sets, one of side-blown device, top blast device or a variety of, each device includes jet pipe, spray gun, one or more in nozzle.

4. a kind of steel-making continuous oven according to claim 1, it is characterised in that: the furnace body is arranged in iron making by smelting reduction Iron device downstream, using the difference in height of melt liquid level, the molten iron for flowing out fused reduction iron-smelting device tapping hole is through pan feeding chute It flow to furnace body and smelts interior.

5. a kind of steel-making continuous oven according to claim 1, it is characterised in that: the fused reduction iron-smelting device is height Furnace, Corex technique furnace, HIsmelt technique furnace, Finex technique furnace, Flash Smelting Furnace, day dodge furnace or dodge iron furnace.