CN105907913B - Combined blender for molten iron mechanical agitation desulfuration and preparation method thereof - Google Patents
Combined blender for molten iron mechanical agitation desulfuration and preparation method thereof Download PDFInfo
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- CN105907913B CN105907913B CN201610404834.8A CN201610404834A CN105907913B CN 105907913 B CN105907913 B CN 105907913B CN 201610404834 A CN201610404834 A CN 201610404834A CN 105907913 B CN105907913 B CN 105907913B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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Abstract
The invention discloses a kind of combined blender for molten iron mechanical agitation desulfuration and preparation method thereof, it includes agitating shaft and the adpting flange being arranged on above agitating shaft, the agitating shaft is from top to bottom made up of shaft part and blade sections, multiple composite stirring blades are symmetrically arranged with the blade sections outer wall, each composite stirring blade includes metallic framework, the agitating shaft includes forced air cooled tube and agitating shaft is metal-cored, the metal-cored inwall bottom of agitating shaft is provided with metal plug, the agitating shaft metal outer core last week of the blade sections is metal-cored to the multiple connections of welding are uniformly distributed, each connect metal-cored along agitating shaft radial outside and metallic framework welding.Combined blender structure and preparation method thereof of the present invention, can reach that agitator structure is simple, prepares simple and effective, with rear agitator recycling rate is high, cost is cheap, desulfurization is stirred characteristic good etc. and integrates purpose.
Description
Technical field
The present invention relates to molten iron preprocessing technical field, is stirred in particular to a kind of combined type for molten iron mechanical agitation desulfuration
Device and preparation method thereof.
Background technology
" external desulfurzation of molten iron, Shanxi is metallurgical, 2007, and No1 " reports, molten iron is as the substantially former of smelting molten steel for document
Material, its chemical composition and physical property decide the quality of steel products and the benefit of enterprise to a certain extent, therefore, from 20
Century 70 starts, and people start to pay attention to the development of Liquid Iron Pretreatment Technology, and update its technique and method, remove iron
Harmful element in water.In addition to sulfur-bearing steel grade, sulphur is one of main harmful element in steel grade, but is removed during blast furnace ironmaking,
The basicity and furnace temperature of slag must be just improved, and this will decline blast-furnace technique economic indicator, simultaneously as converter steelmaking process
Thermodynamic condition restricts, converter desulfurization degree only 40% or so.Substantial amounts of research shows that molten iron pretreatment desulfurizing has been accepted as being blast furnace
Converter-continuous casting flow reduces the most economical technique of sulfur nutrient in steel, be improve blast furnace and converter operation important means it
One, played an important role in steel-making, and develop to the direction that comprehensive molten iron pre-processes.
According to document announcement, in modern steel metallurgical process, the molten iron mechanical agitation desulfuration technique of actual popularization and application is
KR mechanical agitation desulfuration methods.This sulfur method is stirred with the individual layer arrangement cross leaf structure of an outer lining refractories
Mix device and immerse progress rotational agitation molten iron in hot-metal bottle, molten iron level is produced vortex, the desulfurizing agent by weighing is by dispenser
Molten iron surface is added to, and is involved in by vortex in molten iron, mixes, react with high temperature liquid iron, reaches the purpose of desulfurizing iron.This is de-
Sulphur method has desulfuration efficiency high, and sorbent consumption is few, and the activity duration is short, the spies such as metal depletion is low and refractory consumption rate is low
Point.As can be seen here, in the desulphurization reaction system of hot-metal bottle and agitator composition, agitator is that molten iron is stirred with desulfurizing agent
Unique stirring power source of reaction and rotating moving part, high-temperature heating, molten iron infiltration, the slag for being not only subjected to molten iron are invaded
The frequently alternately effect such as change of erosion, high/low temperature, but also is subjected to washing away for high temperature liquid iron, condition of work and its severe, thus
Agitator cracky, service life are short, belong to the expendable device in molten iron mechanical agitation desulfuration system.
It is visible with the architectural feature of agitator according to molten iron KR mechanical agitation desulfurations technical process, in agitator rotary course
In, with the increase of the radial outward expansion distance of stirring vane, the linear velocity of stirring vane increases, and stirring vane is born
Molten iron eroding velocity and its surface reaction forces of molten iron constantly increase, molten iron erosive wear also increases with molten iron osmotic pressure,
Damaged process is constantly aggravated caused by molten iron is washed away with infiltration；Meanwhile strong molten iron turbulent flow and vortex between stirring vane, add
The turbulence in flow field, the impact for increasing stirring vane are damaged between acute stirring vane；Thus, the breakage of molten iron KR desulfurization agitators
The radial outside position of stirring vane is concentrated mainly on, often the termination of agitator active time is stirring vane refractory material
The serious peeling of lining, the even metal-cored ablation of stirring vane, and agitating shaft position is complete.The longevity is used in order to extend agitator
Life, domestic and foreign scholars are in agitator material and structure, preparation technology and agitator is metal-cored and refractory material serves as a contrast complex knot
Structure, agitator on-line maintenance etc. have carried out substantial amounts of research, and achieve in actual production agitator service life into
The excellent results extended again, such as：The Chinese invention patent of Application No. 200910060770.4 discloses a kind of desulfurizing iron and used
Agitator, it is the three leaf agitators on inclined-plane of leaning forward with back iron face that it, which is that a kind of paddle meets untouchable, is leaned forward structure by three leaves,
Enhancing stirring volume with volume inhales circular flow between being emptied, and reaching improves desulfurization kinetics condition purpose, and increases the angle between leaf
Greatly to 120 °, dry slag speed between leaf is reduced, the cleaning of dry slag is facilitated, improves the stability of stirring intensity, and in reality
Popularization and application in production, service life extends 1.5 times compared with conventional whisk；But agitator terminates because stirring vane is damaged
The result used does not have change, simultaneously as the integral structure of agitator, thus terminates the agitator used and must return to and stir
Mix device and prepare unit, after whole dismountings of refractory material lining, only reservation agitating shaft is metal-cored is carried out outside repairing and reusing, remaining
It is all discarded, prepare again.Not only need to expend substantial amounts of human and material resources, financial resources to only having being stirred after for stirring vane breakage
Device is mixed to be removed, but also to expend substantial amounts of human and material resources, financial resources are stirred the metal-cored reparation of axle, it is metal-cored its
The preparation of its part and refractory material lining, when taking the substantial amounts of working time with equipment availability platform, agitator is caused to prepare cost
It is high, it have impact on agitator and prepare the profitability of unit, while the agitator consuming cost of desulfurizing iron is also exacerbated,
Influence the profitability of steel mill；Made an uproar in addition, the stacking for largely removing heels is discarded with demolishing process dust from flying, high-decibel
Sound, disintegrating slag splashing etc., bring serious environmental pollution and potential safety hazard.As can be seen here, appeared in based on damaged concentrate of agitator
The essential characteristic of stirring vane, for routine with rear agitator only retain existing for the metal-cored preparation technology of agitating shaft it is a variety of not
Foot, how reducing agitator and preparing cost, improve with rear agitator reparation value and agitator reparation preparation efficiency is to realize to stir
Mix device preparation manufacturer and the key technology of profit space is lifted with user both sides, however, do not carry out correlative study both at home and abroad at present,
Also without Patents and the document announcement of technical literature.
The content of the invention
It is an object of the invention to provide a kind of combined blender for molten iron mechanical agitation desulfuration and its preparation side
Method, the agitator have it is simple in construction, prepare simple and effective, with rear agitator recycling rate is high, cost is cheap, desulfurization is stirred
The features such as mixed characteristic is excellent is mixed, which solves and mixes device because the monoblock type agitator that stirring vane damage is brought terminates use and gives up
Abandon the loss brought.
To achieve the above object, a kind of combined blender for molten iron mechanical agitation desulfuration provided by the invention, it
Including agitating shaft and the adpting flange being arranged on above agitating shaft, the agitating shaft is from top to bottom made up of shaft part and blade sections,
Multiple composite stirring blades are symmetrically arranged with the blade sections outer wall, each composite stirring blade includes metallic framework, institute
It is metal-cored comprising forced air cooled tube and agitating shaft to state agitating shaft, the metal-cored inwall bottom of agitating shaft is provided with metal plug, described
The metal-cored inside of forced air cooled tube insertion agitating shaft, the forced air cooled tube, metal plug and metal-cored formed of agitating shaft cool down cavity, described
The agitating shaft metal outer core last week of blade sections is metal-cored to the multiple connections of welding are uniformly distributed, and each connects metal-cored along stirring
Welded on the outside of Axial and radial with metallic framework, agitating shaft metal core outer surface, metallic framework outer surface, the agitating shaft gold of the shaft part
Category core bottom and metal plug bottom surface uniform welding have V-arrangement anchoring piece, and the agitating shaft is metal-cored, metallic framework and metal plug
Outer surface is cast with refractory material lining.
Further, the connection is metal-cored with the gap of the solder side of metallic framework and agitating shaft refractory material lining and multiple
Close between stirring vane refractory material serves as a contrast faying face and be filled with filler, and agitating shaft refractory material lining and stirring vane fire proofed wood
Packed layer is formed between material lining faying face.
Yet further, the filling between agitating shaft refractory material lining and composite stirring blade refractory material the lining faying face
Slice width degree is 2~4cm.
Yet further, the connection is metal-cored is prepared using thick-walled metal plate, the metal-cored stretching agitating shaft of connection
The length of refractory material lining is 1~2cm.
Yet further, metallic framework is prepared using spiral or steel bar welding, described metallic framework radially inner side
The length for stretching out composite stirring blade refractory material lining is 1~2cm.
Yet further, the composite stirring blade quantity is 2~4, described to connect metal-cored quantity and composite stirring
Blade quantity is identical.
The invention provides a kind of preparation method of the combined blender for molten iron mechanical agitation desulfuration, including it is following
Step：
1) preparation of casting mold：
According to agitator design drawing and metal-cored, metallic framework protruded length is connected, prepares the fire proofed wood of agitating shaft
Expect the refractory material liner in pouring mould of liner in pouring mould and composite stirring blade；
2) preparation of agitating shaft
A. customary preparation methods are used, welding prepares that forced air cooled tube, agitating shaft be metal-cored and metal plug；Set according to agitator
Meter drawing prepares 2~4 connection metals with being connected metal-cored protruded length requirement, using the cutting of suitable metal material, welding
Core, and by around the circumferentially equally distributed requirement in the metal-cored bottom of agitating shaft, metal-cored and agitating axle leaf fragment stirring will be connected
The metal-cored surface soldered of axle；
B. the refractory material liner in pouring mould for connecting the metal-cored placement agitating shaft of metal-cored agitating shaft will be welded with
Interior, control connects metal-cored 1~2cm of protruded length, and the refractory material that cast prepares agitating shaft is carried out using castable refractory
Lining；
C. after the shaping of agitating shaft refractory material liner in pouring, maintenance is stripped for 24 hours in mould, then natural curing 1 week outside film；This
Afterwards, place in oven and carry out baking drying according to conventional baking process, after coming out of the stove, that is, obtain agitating shaft；
(3) preparation of composite stirring blade
A. according to agitator design drawing and the requirement of metallic framework protruded length, cut using suitable metal material
Cut, welding prepares metallic framework；
B. the metallic framework prepared is placed in the refractory material liner in pouring mould of composite stirring blade, controls metal
The protruded length of skeleton is 1~2cm, using castable refractory carry out cast prepare stirring vane refractory material serve as a contrast；
C. after the refractory material lining of composite stirring blade, maintenance is stripped for 24 hours in mould, then film outer natural curing week；This
Afterwards, place in oven and according to conventional baking process carries out baking drying, after coming out of the stove, obtained composite stirring blade.
(4) prepared by the combination of agitator
A. it is the exposed metal skeleton of the composite stirring blade of above-mentioned preparation and the exposed connection of agitating shaft of preparation is metal-cored
Composite stirring blade is adjusted along agitating shaft radially aligned, and according to design drawing, ensures that agitator structure size is accurate, then welds
Connect fixation；
B. then, the refractory material padding of the refractory material lining and composite stirring blade of cleaning welding welding slag and agitating shaft
Faying face is filled, and a small amount of water or aluminium dihydrogen phosphate aqueous solution or silicon-aluminum sol or water-soluble organic silicon idol are sprayed on faying face
Join agent, then using Chinese patent " molten iron desulphurization stirring device castable refractory, the patent No.：What ZL200510019721.8 " was provided
Castable refractory to agitating shaft refractory material serve as a contrast and blade refractory material lining between filling gap be filled, it is closely knit with it is flat
It is whole, form packed layer；
C. natural curing one week after filling, then local baking 24~48 hours, the molten iron machine of acquisition are carried out to filling position
Tool stirring desulphurization combined blender.
7th, the restorative procedure of a kind of combined blender for molten iron mechanical agitation desulfuration, it is characterised in that：Including with
Lower step：
(1) preparation of casting mold
According to agitator design drawing and metal-cored, metallic framework protruded length is connected, prepares agitating shaft refractory material
Liner in pouring mould and blade refractory material liner in pouring mould；
(2) prepared by the reparation of agitating shaft
After combined blender for molten iron mechanical agitation desulfuration uses termination, it is transported to reparation and prepares place；Using
The dry slag and solidifying iron on pneumatic pick and/or coaloust-oxygen gun cleaning agitating shaft refractory material lining surface, do not damage agitating shaft refractory material as far as possible
Lining；
Packed layer between the refractory material lining of agitating shaft and the refractory material lining of composite stirring blade is peeled off using pneumatic pick
Castable refractory, the metallic framework reinforcing bar for making to be welded to connect expose；Metallic framework is cut off using coaloust-oxygen gun and is welded to connect reinforcing bar,
Composite stirring blade is beaten, composite stirring blade is departed from agitating shaft.
Using the exposed metal-cored surface residual overlap of connection of coaloust-oxygen gun cleaning；Using steel brush and pressure-air cleaning agitating shaft
Refractory material lining and its filling faying face disintegrating slag and floating dust.
On the basis of above-mentioned cleaning, the refractory material lining girth of agitating shaft is measured, calculates agitating shaft fire proofed wood
Material lining residual thickness；
When agitating shaft refractory material, which serves as a contrast reserved thickness, is not more than 25mm with original thickness difference, " it is used for using Chinese patent
The fast repairing material of flush type desulfurized for molten iron, the patent No.：The refractory patching mixture that ZL200510019693.X " is provided is to stirring
Axle refractory material lining face crack, corrode pit, mechanical damage carry out repairing with it is smooth, serve as a contrast agitator refractory material and return to
Original thickness, then carry out 200~400 DEG C and toast 1~2 hour, obtain the agitating shaft needed for this patent.When agitating shaft refractory material
When the reserved thickness of lining is more than 25mm with original thickness difference, agitating shaft refractory material need to be served as a contrast and carry out cast reparation, i.e. first will be above-mentioned
The agitating shaft for having carried out remaining refractory material lining removing surface is placed in agitating shaft refractory material liner in pouring mould, then is used
Chinese patent " molten iron desulphurization stirring device castable refractory, the patent No.：The castable refractory that ZL200510019721.8 " is provided
Poured into a mould, the gap between the remaining refractory material lining of dense packing effect agitating shaft and mould, recover agitator refractory material lining
To original thickness, hereafter, according to agitator preparation method, the interior maintenance of moulding by casting, mould is carried out, the outer natural curing of mould is done with baking
It is dry, complete the agitating shaft of required reparation.
(3) preparation of composite stirring blade
The composite stirring blade preparation method that agitator is repaired in preparation method is stirred with compound in agitator preparation method
It is identical to mix blade preparation method.
(4) prepared by the combination of agitator
Agitator repairs the compositions, process of the agitator in preparation method and the agitator in agitator preparation method
Compositions, process it is identical.It is prepared by the reparation for being finally completed agitator.
The beneficial effects of the present invention are：
The present invention is existing because stirring vane is tight with conventional cross leaf agitator based on molten iron KR mechanical agitation desulfurations
Weight is damaged and terminates the present situation used, meanwhile, because agitator is stirring vane and agitating shaft integral structure, work as stirring vane
When seriously damaging and losing agitating function, agitator is integrally scrapped, and the agitating shaft of little damage, which also follows, to be scrapped, and causes agitating shaft
The significant wastage of function, by agitator structure and agitator Reasons for Damage, verified stirring vane linear velocity with
Radially outwardly extending increase is the main reason for causing agitator breakage to concentrate on stirring vane, especially the outside of stirring vane,
However, agitator structure feature and its each part；In order to contain that agitator damages the monoblock type agitator brought because of stirring vane
Terminate and use and the discarded loss brought, spy has invented a kind of combined blender used for molten iron mechanical stirring desulfuration and its preparation side
Method.The agitator structure being made up of agitating shaft and the combination of composite stirring blade designs, and realizes to be damaged with rear agitator and stirs
The direct replacing of blade, retain remaining agitating shaft use value, reduce agitator and prepare cost and use cost；Pass through stirring
The structure design of axle and composite stirring blade, realizes the combination of agitating shaft and composite stirring blade, ensure that making for agitator
With function and it is stirred characteristic.Pass through a kind of brand-new stirring of combined blender used for molten iron mechanical stirring desulfuration of the present invention
Device prepare and the reparation preparation method with rear agitator, realize brand-new combined blender with it is smooth with rear combined blender
Prepare, ensure that the preparation quality and performance of agitator.As can be seen here, by the present invention combined blender structure and
Its preparation method, can reach that agitator structure is simple, prepare simple and effective, with rear agitator recycling rate is high, cost
Cheap, desulfurization is stirred characteristic good etc. and integrates purpose.
Brief description of the drawings
Fig. 1 faces B-B diagrammatic cross-sections for a kind of combined blender used for molten iron mechanical stirring desulfuration of the present invention；
Fig. 2 is the A-A profiles of Fig. 12 composite stirring blades；
Fig. 3 is the A-A profiles of Fig. 13 composite stirring blades；
Fig. 4 is the A-A profiles of Fig. 14 composite stirring blades；.
In figure, agitating shaft 1, shaft part 1.a, blade sections 1.b, forced air cooled tube 1.1, agitating shaft are metal-cored 1.2, metal plug 1.3,
Connect metal-cored 1.4, adpting flange 2, composite stirring blade 3, metallic framework 3.1, cooling cavity 4, V-arrangement anchoring piece 5, fire proofed wood
Material lining 6, packed layer 7.
Embodiment
In order to preferably explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
Present disclosure is not limited solely to following examples.
Embodiment 1：
As shown in Fig. 1~2：A kind of combined blender for molten iron mechanical agitation desulfuration, it includes agitating shaft and set
The adpting flange 2 above agitating shaft 1 is put, agitating shaft 1 is from top to bottom made up of shaft part 1.a and blade sections 1.b, blade sections 1.b
2 composite stirring blades 3 are symmetrically arranged with outer wall, each composite stirring blade includes metallic framework 3.1, and agitating shaft 1 wraps
Forced air cooled tube 1.1 and agitating shaft metal-cored 1.2 are included, the metal-cored 1.2 inwall bottom of agitating shaft is provided with metal plug 1.3, forced air cooled tube
Inside 1.1 insertion agitating shafts metal-cored 1.2, forced air cooled tube 1.1, metal plug 1.3 and agitating shaft metal-cored 1.2 form cooling cavity
The multiple connections metal-cored 1.4 of welding, each connection are circumferentially uniformly distributed on 4, blade sections 1.b metal-cored 1.2 outer wall of agitating shaft
Metal-cored 1.4 weld along agitating shaft radial outside and metallic framework 3.1, shaft part 1.a metal-cored 1.2 outer surface of agitating shaft, gold
Category skeleton 3.1 outer surface, metal-cored 1.2 bottom of agitating shaft and the bottom surface uniform welding of metal plug 1.3 have V-arrangement anchoring piece 5, stir
Axle is metal-cored 1.2, metallic framework 3.1 and the outer surface of metal plug 1.3 have poured refractory material working lining 6.
Metal-cored 1.4 are connected to stir with compound with the gap of the solder side of metallic framework 3.1 and the refractory material of agitating shaft 1 lining 6
Mix between the refractory material of blade 3 serves as a contrast 6 faying faces and be filled with filler, and the refractory material of agitating shaft 1 lining 6 and composite stirring blade 3
Refractory material forms packed layer 7 between serving as a contrast 6 faying faces.The width of packed layer 7 is 2~4cm.
Connect metal-cored 1.5 to prepare using thick-walled metal plate, the refractory material of agitating shaft 1 lining 6 is stretched out in connection metal-cored 1.5
Length is 1~2cm.
Metallic framework 3.1 is prepared using spiral or steel bar welding, the radially inner side of metallic framework 3.1 stretch out and compound stir
The length for mixing blade refractory material lining 6 is 1~2cm.
The preparation method of the above-mentioned combined blender for molten iron mechanical agitation desulfuration, comprises the following steps：
1) preparation of casting mold：
According to agitator design drawing and the metal-cored 1.4, protruded length of metallic framework 3.1 is connected, prepares agitating shaft 1
Refractory material serves as a contrast 6 casting molds and the refractory material of composite stirring blade 3 serves as a contrast 6 casting molds；
2) preparation of agitating shaft
A. customary preparation methods are used, welding prepares forced air cooled tube 1.1, agitating shaft metal-cored 1.2 and metal plug 1.3；Root
According to agitator design drawing with being connected metal-cored 1.4 protruded length requirement, 2 are prepared using the cutting of suitable metal material, welding
~4 connections metal-cored 1.4, and by around the circumferentially equally distributed requirement in the metal-cored bottom of agitating shaft, will connect metal-cored 1.4 and
The blade sections 1.b of agitating shaft 1 metal-cored 1.2 surface soldered of agitating shaft；
B. by the cast of refractory material lining 6 of the metal-cored 1.2 placement agitating shaft 1 of the agitating shaft for being welded with connection metal-cored 1.4
In mould, 1~2cm of protruded length of control connection metal-cored 1.2, cast is carried out using castable refractory and prepares agitating shaft
1 refractory material lining 6；
C. after the refractory material of agitating shaft 1 lining pours 6 injection formings, maintenance is stripped for 24 hours in mould, then natural curing 1 week outside film；
Hereafter, place in oven and carry out baking drying according to conventional baking process, after coming out of the stove, that is, obtain agitating shaft；
(3) preparation of composite stirring blade
A. according to agitator design drawing and the requirement of the protruded length of metallic framework 3.1, carried out using suitable metal material
Cutting, welding prepare metallic framework 3.1；
B. the metallic framework 3.1 prepared is placed in the refractory material liner in pouring mould of composite stirring blade 3, controlled
The protruded length of metallic framework 3.1 is 1~2cm, using castable refractory carry out cast prepare stirring vane 3 refractory material serve as a contrast
6；
C. after the refractory material lining 6 of composite stirring blade 3, maintenance is stripped for 24 hours in mould, then natural curing 1 week outside film；
Hereafter, place in oven and according to conventional baking process carries out baking drying, after coming out of the stove, obtained composite stirring blade 3.
(4) prepared by the combination of agitator
A. by the exposed metal skeleton 3.1 of the composite stirring blade 3 of above-mentioned preparation and the exposed connection gold of agitating shaft 1 of preparation
Belong to core 1.5 along the radially aligned of agitating shaft 1, and composite stirring blade 2 is adjusted according to design drawing, ensure that agitator structure size is accurate
Really, then it is welded and fixed；
B. then, the refractory material of the refractory material lining 6 and composite stirring blade 3 of cleaning welding welding slag and agitating shaft 1
6 filling faying faces are served as a contrast, and spray a small amount of water or aluminium dihydrogen phosphate aqueous solution or silicon-aluminum sol or water solubility on faying face to have
Machine silicone couplet, then using Chinese patent " molten iron desulphurization stirring device castable refractory, the patent No.：ZL200510019721.8”
The filling gap that the castable refractory of offer is served as a contrast to agitating shaft refractory material between blade refractory material lining is filled, is closely knit
With smooth, formation packed layer 7；
C. natural curing one week after filling, then local baking 24~48 hours, the molten iron machine of acquisition are carried out to filling position
Tool stirring desulphurization combined blender.
The restorative procedure of the above-mentioned combined blender for molten iron mechanical agitation desulfuration, it is characterised in that：Including following
Step：
(1) preparation of casting mold
According to agitator design drawing and the metal-cored 1.4, protruded length of metallic framework 3.1 is connected, it is resistance to prepare agitating shaft 1
Fiery material lining pours 6 injection forming moulds and the refractory material of composite stirring blade 3 serves as a contrast 6 casting molds；
(2) prepared by the reparation of agitating shaft
After combined blender for molten iron mechanical agitation desulfuration uses termination, it is transported to reparation and prepares place；Using
Pneumatic pick and/or coaloust-oxygen gun cleaning agitating shaft refractory material serve as a contrast the dry slag on 6 surfaces and solidifying iron, do not damage agitating shaft refractory material as far as possible
Lining 6；
Packed layer 7 between the refractory material of agitating shaft 1 lining 6 and the refractory material of composite stirring blade 3 lining 6 is peeled off using pneumatic pick
Castable refractory, the reinforcing bar of metallic framework 3.1 for making to be welded to connect expose；Metallic framework 3.1 is cut off using coaloust-oxygen gun to be welded to connect
Reinforcing bar, composite stirring blade 3 is being beaten, composite stirring blade 3 is departed from agitating shaft 1.
Using the exposed metal-cored 1.4 surface residual overlap of connection of coaloust-oxygen gun cleaning；Stirred using steel brush and pressure-air cleaning
Mix the refractory material lining 6 and its filling faying face disintegrating slag and floating dust of axle 1.
On the basis of above-mentioned cleaning, refractory material 6 girths of lining of agitating shaft 1 are measured, calculate agitating shaft fire resisting
Material 6 serves as a contrast residual thickness；
When the refractory material of agitating shaft 1, which serves as a contrast 6 residual thickness, is not more than 25mm with original thickness difference, using refractory patching mixture pair
The refractory material of agitating shaft 1 serve as a contrast 6 face cracks, corrode pit, mechanical damage carry out repairing with it is smooth, make the refractory material of agitator 1
Lining 6 returns to original thickness, then carries out 200~400 DEG C and toast 1~2 hour, obtains agitating shaft；
When 6 reserved thickness of agitating shaft refractory material lining is more than 25mm with original thickness difference, " it is used to dive using Chinese patent
Enter the fast repairing material of formula desulfurizing iron utensil, the patent No.：The refractory patching mixture that ZL200510019693.X " is provided is to agitating shaft
Refractory material lining face crack, corrode pit, mechanical damage carry out repairing with it is smooth, serve as a contrast agitator refractory material and return to original
Beginning thickness, then carry out 200~400 DEG C and toast 1~2 hour, obtain the agitating shaft needed for this patent.When agitating shaft refractory material serves as a contrast
When reserved thickness is more than 25mm with original thickness difference, cast reparation need to be carried out to agitating shaft refractory material lining, i.e. first by it is above-mentioned enter
The agitating shaft 1 that remaining refractory material of having gone serves as a contrast 6 removing surfaces is placed in agitating shaft refractory material liner in pouring mould, then is used
Chinese patent " molten iron desulphurization stirring device castable refractory, the patent No.：The castable refractory that ZL200510019721.8 " is provided
Poured into a mould, the gap between 1 remaining refractory material of dense packing effect agitating shaft lining 6 and mould, make agitator refractory material lining 6 extensive
Original thickness is arrived again, hereafter, according to agitator preparation method, carries out the interior maintenance of moulding by casting, mould, the outer natural curing of mould and baking
Dry, complete the agitating shaft 1 of required reparation.
(3) preparation of composite stirring blade 3
The preparation method of composite stirring blade 3 that agitator is repaired in preparation method is stirred with compound in agitator preparation method
It is identical to mix the preparation method of blade 3.
(4) prepared by the combination of agitator
Agitator repairs the compositions, process of the agitator in preparation method and the agitator in agitator preparation method
Compositions, process it is identical.It is prepared by the reparation for being finally completed agitator.
Embodiment 2
As shown in figs. 1 and 3, the agitator structure of the present embodiment is substantially the same manner as Example 1, and difference is：
The quantity of composite stirring blade 3 is 3.
Embodiment 3
As shown in figs. 1 and 4, the agitator structure of the present embodiment is substantially the same manner as Example 1, and difference is：
The quantity of composite stirring blade 3 is 3.
Other unspecified parts are prior art.Although above-described embodiment is made that to the present invention and retouched in detail
State, but it is only part of the embodiment of the present invention, rather than whole embodiments, people can also according to the present embodiment without
Other embodiment is obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.
Claims (7)
1. a kind of combined blender for molten iron mechanical agitation desulfuration, it includes agitating shaft and is arranged on agitating shaft (1)
The adpting flange (2) of side, it is characterised in that：The agitating shaft (1) is from top to bottom made up of shaft part (1.a) and blade sections (1.b),
Multiple composite stirring blades (3) are symmetrically arranged with blade sections (1.b) outer wall, each composite stirring blade includes metal
Skeleton (3.1), the agitating shaft (1) includes forced air cooled tube (1.1) and agitating shaft is metal-cored (1.2), and the agitating shaft is metal-cored
(1.2) inwall bottom is provided with metal plug (1.3), and forced air cooled tube (1.1) the insertion agitating shaft metal-cored (1.2) is internal, institute
State forced air cooled tube (1.1), metal plug (1.3) and agitating shaft metal-cored (1.2) and form cooling cavity (4), the blade sections (1.b)
Metal-cored (1.2) outer wall of agitating shaft on be circumferentially uniformly distributed welding it is multiple connect metal-cored (1.4), each connect metal-cored
(1.4) welded along agitating shaft radial outside and metallic framework (3.1), metal-cored (1.2) appearance of agitating shaft of the shaft part (1.a)
Face, metallic framework (3.1) outer surface, metal-cored (1.2) bottom of agitating shaft and metal plug (1.3) bottom surface uniform welding have V-arrangement
Anchoring piece (5), the agitating shaft metal-cored (1.2), metallic framework (3.1) and metal plug (1.3) outer surface are cast with fire resisting
Material serves as a contrast (6)；The gap for connecting metal-cored (1.4) and the solder side of metallic framework (3.1) and agitating shaft (1) refractory material
Filler, and agitating shaft (1) fire proofed wood are filled between the refractory material of lining (6) and composite stirring blade (3) lining (6) faying face
Packed layer (7) is formed between the refractory material of material lining (6) and composite stirring blade (3) lining (6) faying face.
2. it is used for the combined blender of molten iron mechanical agitation desulfuration according to claim 1, it is characterised in that：The stirring
Packed layer (7) width that axle (1) refractory material is served as a contrast between refractory material lining (6) faying face of (6) and composite stirring blade (3) is 2
~4cm.
3. it is used for the combined blender of molten iron mechanical agitation desulfuration according to claim 1, it is characterised in that：The connection
Metal-cored (1.4) are prepared using thick-walled metal plate, and described metal-cored (1.5) stretching agitating shaft (1) refractory material that connects serves as a contrast (6)
Length is 1~2cm.
4. it is used for the combined blender of molten iron mechanical agitation desulfuration according to claim 1, it is characterised in that：The metal
Skeleton (3.1) is prepared using spiral or steel bar welding, and described metallic framework (3.1) radially inner side stretches out composite stirring leaf
The length of piece refractory material lining (6) is 1~2cm.
5. it is used for the combined blender of molten iron mechanical agitation desulfuration according to claim 1, it is characterised in that：It is described compound
Stirring vane (3) quantity is 2~4, and metal-cored (1.4) quantity of connection is identical with composite stirring blade (3) quantity.
6. being used for the preparation method of the combined blender of molten iron mechanical agitation desulfuration described in a kind of claim 1, its feature exists
In：Comprise the following steps：
1) preparation of casting mold：
According to agitator design drawing and metal-cored (1.4), metallic framework (3.1) protruded length are connected, prepares agitating shaft (1)
Refractory material lining (6) casting mold and composite stirring blade (3) refractory material lining (6) casting mold；
2) preparation of agitating shaft
A. customary preparation methods are used, welding prepares forced air cooled tube (1.1), agitating shaft metal-cored (1.2) and metal plug (1.3)；
According to agitator design drawing with being connected metal-cored (1.4) protruded length requirement, made using the cutting of suitable metal material, welding
Standby 2~4 connections are metal-cored (1.4), and by around the circumferentially equally distributed requirement in the metal-cored bottom of agitating shaft, will connect metal-cored
With metal-cored (1.2) surface soldered of agitating shaft of agitating shaft (1) blade sections (1.b)；
B. the refractory material lining (6) for agitating shaft metal-cored (1.2) the placement agitating shaft (1) for connecting metal-cored (1.4) will be welded with
In casting mold, control connects the 1~2cm of protruded length of metal-cored (1.2), and cast preparation is carried out using castable refractory
The refractory material lining (6) of agitating shaft (1)；
C. after the shaping of agitating shaft refractory material liner in pouring, maintenance is stripped for 24 hours in mould, then natural curing 1 week outside film；Hereafter, put
Put in oven and carry out baking drying according to conventional baking process, after coming out of the stove, that is, obtain agitating shaft；
3) preparation of composite stirring blade
A. according to agitator design drawing and the requirement of metallic framework (3.1) protruded length, cut using suitable metal material
Cut, welding prepares metallic framework (3.1)；
B. the metallic framework prepared (3.1) is placed in the refractory material liner in pouring mould of composite stirring blade (3), controlled
The protruded length of metallic framework (3.1) is 1~2cm, and the fire proofed wood that cast prepares stirring vane (3) is carried out using castable refractory
Material lining (6)；
C. after the refractory material lining (6) of composite stirring blade (3), maintenance is stripped for 24 hours in mould, then natural curing 1 week outside film；
Hereafter, place in oven and according to conventional baking process carries out baking drying, after coming out of the stove, obtained composite stirring blade (3)；
4) prepared by the combination of agitator
A. by the exposed metal skeleton (3.1) of the composite stirring blade (3) of above-mentioned preparation and the exposed connection gold of agitating shaft of preparation
Belong to core (1.4) along agitating shaft (1) radially aligned, and composite stirring blade is adjusted according to design drawing, ensure agitator structure chi
It is very little accurate, then it is welded and fixed；
B. then, the fire proofed wood of the refractory material lining (6) and composite stirring blade (3) of cleaning welding welding slag and agitating shaft (1)
Material lining (6) filling faying face, and a small amount of water or aluminium dihydrogen phosphate aqueous solution or silicon-aluminum sol or water-soluble are sprayed on faying face
Property organo-silicon coupling agent, using fire resisting of the castable refractory to agitating shaft (1) refractory material lining (6) and composite stirring blade (3)
Filling gap between material lining (6) is filled, is closely knit with smooth, formation packed layer (7)；
C. natural curing one week after filling, then local baking 24~48 hours is carried out to filling position, the molten iron machinery of acquisition stirs
Mix desulfurization combined blender.
7. a kind of restorative procedure of the combined blender for molten iron mechanical agitation desulfuration prepared by claim 6, its feature
It is：Comprise the following steps：
1) preparation of casting mold
According to agitator design drawing and metal-cored (1.4), metallic framework (3.1) protruded length are connected, prepares agitating shaft (1)
Refractory material serves as a contrast (6) casting mold and composite stirring blade (3) refractory material lining (6) casting mold；
2) prepared by the reparation of agitating shaft (1)
A. after the combined blender for molten iron mechanical agitation desulfuration uses termination, it is transported to reparation and prepares place；Using wind
The dry slag and solidifying iron on pick and/or coaloust-oxygen gun cleaning agitating shaft refractory material lining (6) surface, do not damage agitating shaft refractory material as far as possible
Serve as a contrast (6)；
B. peeled off using pneumatic pick refractory material lining (6) and the composite stirring blade (3) of agitating shaft (1) refractory material lining (6) it
Between packed layer (7) castable refractory, metallic framework (3.1) reinforcing bar for making to be welded to connect exposes；Metal is cut off using coaloust-oxygen gun
Skeleton (3.1) is welded to connect reinforcing bar, is beating composite stirring blade (3), composite stirring blade (3) is departed from agitating shaft (1)；
C. using exposed metal-cored (1.4) the surface residual overlap of connection of coaloust-oxygen gun cleaning；Stirred using steel brush and pressure-air cleaning
Mix the refractory material lining (6) and its filling faying face disintegrating slag and floating dust of axle (1)；
D. on the basis of above-mentioned cleaning, refractory material lining (6) girth of agitating shaft (1) is measured, calculates agitating shaft (1)
Refractory material (6) serves as a contrast residual thickness；
, need to be to agitating shaft (1) when the refractory material lining (6) of agitating shaft (1), which reserves thickness, is more than 25mm with original thickness difference
Refractory material lining (6) carries out cast reparation, i.e. first by the above-mentioned agitating shaft for having carried out remaining refractory material and having served as a contrast (6) removing surface
(1) place in agitating shaft (1) refractory material lining (6) casting mold, then poured into a mould using castable refractory, dense packing effect
Gap between the remaining refractory material lining of agitating shaft and mould, makes agitator refractory material lining (6) return to original thickness, this
Afterwards, according to agitator preparation method, the interior maintenance of moulding by casting, mould, the outer natural curing of mould and baking drying is carried out, is completed required
The agitating shaft (1) of reparation；
3) preparation of composite stirring blade (3)
Composite stirring blade (3) preparation method that agitator is repaired in preparation method is prepared with the agitator described in claim 6
Composite stirring blade (3) preparation method in method is identical；
4) prepared by the combination of agitator
Agitator repairs the compositions, process of the agitator in preparation method and the agitator preparation method described in claim 6
In agitator compositions, process it is identical, be finally completed agitator reparation prepare.
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| CN107435085B (en) * | 2017-07-17 | 2019-03-15 | 武汉钢铁有限公司 | The efficient mixing agitator of desulfurizing iron |
| CN110055369B (en) * | 2019-05-21 | 2020-11-20 | 武汉钢铁有限公司 | Method for quickly cleaning sticky slag of KR desulfurization stirrer for molten iron |
| CN112892264B (en) * | 2021-01-21 | 2022-06-03 | 武汉钢铁有限公司 | Efficient and stable mixing stirrer in full-service process |
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| CN102154533A (en) * | 2011-05-09 | 2011-08-17 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| CN202543251U (en) * | 2012-03-20 | 2012-11-21 | 武汉钢铁(集团)公司 | Fatigue, fracture and breakage resistant stirrer for desulfurization of molten iron |
| CN202968591U (en) * | 2012-12-18 | 2013-06-05 | 营口东邦冶金设备耐材有限公司 | Molten iron desulfurization mixer |
| CN104212932A (en) * | 2014-07-30 | 2014-12-17 | 武汉钢铁(集团)公司 | Low-cost consumable molten iron desulphurization mixer and preparation method thereof |
| CN204385225U (en) * | 2014-12-23 | 2015-06-10 | 北京利尔高温材料股份有限公司 | A kind of desulfur agitator |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154533A (en) * | 2011-05-09 | 2011-08-17 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| CN202543251U (en) * | 2012-03-20 | 2012-11-21 | 武汉钢铁(集团)公司 | Fatigue, fracture and breakage resistant stirrer for desulfurization of molten iron |
| CN202968591U (en) * | 2012-12-18 | 2013-06-05 | 营口东邦冶金设备耐材有限公司 | Molten iron desulfurization mixer |
| CN104212932A (en) * | 2014-07-30 | 2014-12-17 | 武汉钢铁(集团)公司 | Low-cost consumable molten iron desulphurization mixer and preparation method thereof |
| CN204385225U (en) * | 2014-12-23 | 2015-06-10 | 北京利尔高温材料股份有限公司 | A kind of desulfur agitator |
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