CN104152633B - Non-maintaining low-cost molten iron pretreatment spray lance and preparation method thereof - Google Patents
Non-maintaining low-cost molten iron pretreatment spray lance and preparation method thereof Download PDFInfo
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- CN104152633B CN104152633B CN201410373978.2A CN201410373978A CN104152633B CN 104152633 B CN104152633 B CN 104152633B CN 201410373978 A CN201410373978 A CN 201410373978A CN 104152633 B CN104152633 B CN 104152633B
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Abstract
The invention discloses a kind of non-maintaining low-cost molten iron pretreatment spray lance and preparation method thereof, the joint flange that this spray gun comprises composite wood spray gun core, covers the fire proofed wood spray gun of composite wood spray gun core periphery lining and arrange above composite wood spray gun core, described composite wood spray gun core comprises internal layer rifle core crab, is filled with plastic refractory in described rifle core crab.First the method prepares rifle core crab, plastic refractory is filled with in rifle core crab, prepare composite wood spray gun core, again V-arrangement anchoring piece and two V-arrangement anchoring piece to be misplaced welding on the surface at rifle core crab, at V-arrangement anchoring piece top welding annulus anchoring piece, then rifle core crab surface coverage fire proofed wood spray gun lining; Above-mentioned prefabricated Spray gun model is loaded in roaster and toasts; Namely spray gun is obtained.Spray gun prepared by the present invention, the making quality of the spray gun of the present invention of guarantee, simplifies spray gun manufacture craft and quality control, reduces and makes materials consumption and manpower consumption, reduces the comprehensive cost of manufacture of spray gun further.
Description
Technical field
The present invention relates to the outer pretreated winding-up preprocessing technical field of molten iron furnace before converter steelmaking, refer to a kind of non-maintaining low-cost molten iron pretreatment spray lance for fish torpedo ladle or iron ladle blowing desulfurization and preparation method thereof particularly.
Background technology
At present, before metallurgy industry converter steelmaking, molten iron furnace is jetted outward the spray gun that pre-treatment uses, mainly served as a contrast by metal gun core and fire proofed wood spray gun and form, wherein, metal gun core by being responsible for, reinforced pipe, stiffening web, riveting component and winding-up mouth form, fire proofed wood spray gun lining adopts mould material integrated poured shaping, weak point is service life of lance, and short to make material price with spray gun high, cause molten iron spraying desulfurization spraying pretreating spray gun consuming cost to remain high, seriously constrain the benefits of production and management of molten iron winding-up pretreatment process.For this reason, Chinese scholars has successively carried out series of studies work with the angle reducing spray gun cost of manufacture from extending spray gun work-ing life, as: Chinese patent " hot metal pretreatment spray gun " (patent No. ZL200320115797.7), " long life single spray mouth deactivating magnesium desulfurizing spray gun " (patent No. ZL03254739.0), " molten iron spraying desulfurization spraying gun " (patent No. is ZL200710051992.0), " self-cooling iron liquid pretreating spray gun " (patent No. ZL200610018623.7), " refractory castable for desulfurizing spray gun " (patent No. ZL03118869.9) etc., by the appropriate design of rifle cored structure, the raw-material optimized choice of refractory castable and improvement in performance, thermal expansion buffering etc. between metal gun core and fire proofed wood spray gun serve as a contrast, effectively contain the development process of lance damage, and obviously reduce rifle lining refractories cost, and achieve in production application and significantly extend spray gun work-ing life, reduce the excellent results of spray gun consuming cost.But from data at home and abroad report, although spray gun level in work-ing life achieves significantly progress at present, occur extending weak phenomenon once again, constrain the further reduction of molten iron spraying desulfurization spraying operation spray gun consuming cost.
For this reason, Chinese scholars pays close attention to the reduction of spray gun cost of manufacture gradually, especially iron and steel the situation is tense with market competition encourage domestic, carry out the research of spray gun cost degradation, as: Chinese patent " sectional type molten iron pretreatment spray gun " (patent No. ZL201020183502.X), " low-cost molten iron pretreatment spray lance " (patent No. ZL200920086152.2), " monoblock type hot metal pretreatment spray gun " (patent No. ZL201220139735.9), improved by spray gun structure one-piece construction, the optimized choice of metallic substance, the utilization of fire-resistant reworked material, the reparation utilization of metal gun core and rifle cored structure are optimized and lightweight etc., reach and reduce the object that spray gun makes materials consumption and cost, but by the restriction of the harsh working conditions of spray gun and the restriction of phase interior mechanics requirement of strength of being on active service, spray gun weight and materials consumption reduce slightly, fire-resistant reworked material uses region limited, meanwhile, the reparation for metal gun core utilizes, and due to expensive with warehousing costs with rear spray gun transport, and in dismounting repair process, manpower consumption is large, causes spray gun comprehensive cost to decline not obvious, in addition, in the actual application of spray gun, spray gun fire proofed wood spray gun serves as a contrast frequent breakage and causes online repair maintenance amount large, not only have impact on the operating rate of sweetener, simultaneously a large amount of repair material with safeguard that manpower consumption further increases desulfurizing iron cost.As can be seen here, under current service life of lance and cost of manufacture further improves the condition of difficulty, the frequent damaged online repair maintenance of spray gun is one of key factor affecting molten iron spraying desulfurization spraying preconditioning technique economic target, thus be necessary to carry out the non-maintaining technical study in spray gun lightweight, cost degradation, spray gun economy life-span and military service phase further, reach the object reducing molten iron spraying desulfurization spraying process cost, improve throughput.
Summary of the invention
The object of the invention is to be to provide a kind of non-maintaining low-cost molten iron pretreatment spray lance and preparation method thereof.
The structural analysis of this area molten iron spraying desulfurization spraying pre-treatment conventional lance:
Spray gun is in fact serve as a contrast two parts by metal gun core and fire proofed wood spray gun to form, and other parts are auxiliary interconnecting piece or winding-up passage component, and wherein, about metal gun core weight is about the half of spray gun gross weight, cost is a little more than the half of spray gun total cost.By the functional analysis of each building block of conventional lance, metal gun core mainly provides the strength and stiffness of spray gun, prevent the bending of spray gun and fracture, but metal gun core resistance to elevated temperatures is poor, temperature more than 500 DEG C after mechanical property sharply decline; Fire proofed wood spray gun lining mainly provides the function of the high temperature resistance of spray gun and iron-resistant water, slag corrosion, meet the use properties requirement of the severe pyroreaction operating mode of molten iron spraying desulfurization spraying, and by its heat-proof quality, in spray gun use procedure, prevent metal gun core overtemperature and affect the performance of its function, but refractory materials is typical hard brittle material, its tension and shear behavior are far below compressive property, because heat conductivility is low, Young's modulus is high, thermal shock resistance is poor, easily forms crack due to thermal stress damaged under the high temperature change condition of intermittent type molten iron spraying desulfurization spraying.
By the Tracking investigation of spray gun use procedure, dissect and analysis on Breakage Mechanism with rear spray gun, lance damage origin fire proofed wood spray gun lining, the process of (crack initiation), crack growth, penetration of cracks rifle lining is sprouted by rifle lining crackle, final high temperature liquid iron or slag penetration crackle and the fracture of corrode rifle core, wherein, rifle lining crackle is sprouted and is originated from rifle lining outside surface and the bonding surface (internal surface) with rifle core.
Think, cause rifle to serve as a contrast reason that surface crack sprouts is the alternating thermal stress under service intermittent mode, and the crackle of rifle lining internal surface is sprouted reason and is the structural stress that rifle core and rifle serve as a contrast thermal dilation difference and bring.
Based on above-mentioned conventional whisk structure, function and analysis on Breakage Mechanism, for the defect of conventional whisk, the non-maintaining low-cost molten iron pretreatment spray lance of one provided by the invention, comprise composite wood spray gun core, the fire proofed wood spray gun lining covering composite wood spray gun core periphery and the joint flange arranged above composite wood spray gun core, described composite wood spray gun core comprises internal layer rifle core crab, on described rifle core crab outer wall, Heterogeneous Permutation welding is provided with V-arrangement anchoring piece and two V-arrangement anchoring piece, described V-arrangement anchoring piece top is welded with annulus anchoring piece, described rifle core crab lower end sidewall is provided with lower cover, described rifle core crab comprises inner thin-walled internal lining pipe and is provided with multi-turn circumference steel loop along stir shaft direction with outside, multi-turn circumference steel loop is uniformly distributed vertically, outside described thin-walled internal lining pipe, centered by axis, line is evenly arranged many for connecting the axial steel bar of circumferential steel loop in emitting shape from inside to outside, plastic refractory is filled with in described rifle core crab.
Preferably, described plastic refractory is that commercially available phosphate-bonded aluminum silicon carbide carbonaceous is moldable.
The present invention is by the rifle core crab structure design of composite wood spray gun core, reduce rifle core metal material usage more than 1/2, thus reduce the thermal expansion amount of rifle core metal material, alleviate composite wood spray gun core and fire proofed wood spray gun and serve as a contrast thermal expansion structural stress on bonding surface, simultaneously, adopt low-quality metallic substance and easy welding preparation technology, significantly reduce the cost of manufacture of rifle core rifle core crab, by the employing of the plastic refractory of composite wood spray gun core, not only ensure that mechanical strength and the rigidity of composite wood spray gun core, enhance the heat-proof quality of composite wood spray gun core simultaneously, improve the high temperature resistant property of composite wood spray gun core, and in spray gun baking with use procedure, by the dry shrinkage of plastic refractory, serve as a contrast on bonding surface at composite wood spray gun core and fire proofed wood spray gun and form shrinkage joint, alleviate the thermal expansion structural stress of bonding surface further, the sprouting of containment fire proofed wood spray gun lining surface cracks, and by the heat-blocking action of shrinkage joint, the thermal insulation protection of reinforced composite material rifle core, increase the radial heat transfer resistance of fire proofed wood spray gun lining to composite wood spray gun core, reduce the radial temperature difference thermal stresses of fire proofed wood spray gun lining, slow down sprouting and the tempo of crackle.
In some embodiments, described fire proofed wood spray gun lining is included on rifle core crab outer wall and scribbles heat shield liner, mould material lining is also coated with outside described heat shield liner, when described mould material lining is jet, molten iron level is served as a contrast and the bottom section of slipping into rifle lining by the top revealed section rifle of unlike material for interface, described top revealed section rifle lining pours into rifle lining with the mould material that fire-resistant reworked material is main raw material(s), and the section of slipping into rifle lining in bottom serves as a contrast for refractory castable for desulfurizing spray gun pours into rifle.
The heat shield liner that the present invention is served as a contrast by fire proofed wood spray gun and the design of mould material lining bilayer structure, enhance fire proofed wood spray gun lining to the effect of composite wood spray gun core thermal insulation protection, further increase the high temperature resistant property of composite wood spray gun core, simultaneously, the disclosed spray material of refractory heat-insulating spray material and preparation method thereof and application (application publication number: CN102924099A) is adopted to prepare heat shield liner, not only ensure that heat shield liner use temperature >=1550 DEG C, and, by dry shrinkage and the stress deformation ability of himself of heat shield liner in spray gun baking and use procedure, alleviate the thermal expansion structural stress of bonding surface, the sprouting of containment fire proofed wood spray gun lining surface cracks, and by the heat-blocking action of shrinkage joint, the thermal insulation protection of reinforced composite material rifle core, increase the radial heat transfer resistance of fire proofed wood spray gun lining to composite wood spray gun core, reduce the radial temperature difference thermal stresses of mould material lining, slow down sprouting and the tempo of mould material lining crackle, the selection of the two-part structure design that the top revealed section rifle lining served as a contrast by mould material and the bottom section of slipping into rifle are served as a contrast and different product refractory casting material, ensure that the comprehensive use properties of spray gun, and considerably reduces the cost of manufacture of spray gun mould material lining.
In other embodiments, because when joint flange is connected with rifle core crab, because working strength is excessive, the stability between them can be affected, so in the present invention, in order to strengthen the stability between them, described joint flange lower end internal surface is provided with several and strengthens gusset, described rifle core crab top and joint flange with strengthen gusset and be welded and fixed.
Preferably, be provided with the winding-up mouth communicated with thin-walled internal lining pipe above described lower cover, described winding-up mouth is horizontally disposed with or the axis of mouth of jetting and thin-walled internal lining pipe axis angle are less than 90 °.
Preferably, the winding-up mouth communicated with thin-walled internal lining pipe is provided with bottom described composite wood spray gun core.
Preferably, described winding-up mouth is steel pipe or metal pedestal and the carbon element control multiple-unit tube for compound, described steel-pipe welding is fixed in rifle core crab and fire proofed wood spray gun lining, described metal pedestal is fixedly welded on rifle core crab, described carbon element pipe one end is fixed in metal pedestal by carbon mud, and the other end is fixed in fire proofed wood spray gun lining by carbon mud.
Present invention also offers a kind of preparation method of non-maintaining low-cost molten iron pretreatment spray lance, comprise the following steps:
1) metallic substance selecting above-mentioned parts to need, according to the structural parameter of the above-mentioned spray gun of preparation, each metal parts of processing and fabricating spray gun also eliminates rust for subsequent use;
2) chosen axis is to steel bar, and its line centered by axis is fixed in emitting shape uniform welding on thin-walled internal lining pipe outer wall from inside to outside, choose circumferential steel loop, be uniformly distributed vertically and be weldingly fixed on axial steel bar surface, if thin-walled internal lining pipe lower port not with winding-up mouth coaxial communication, then need the shutoff of welding lower cover; Namely rifle core crab is prepared;
3) at the Link Port that the processing of the lower end of thin-walled internal lining pipe is supporting with winding-up mouth, and welding is communicated with winding-up mouth steel pipe or metal pedestal;
4) joint flange is welded with rifle core crab upper end communicate, and weld polylith and strengthen gusset for reinforcement by connection;
5) welding slag and scum silica frost is cleared up, after, carrying out the resistance to air loss checking weldment blast pass passage, by floating for moldable for the phosphate-bonded aluminum silicon carbide carbonaceous ramming that carries out, dense packing effect in rifle core crab weldment space, and guarantees that ramming charge level height is identical with metal steel loop, namely prepares plastic refractory, naturally to dry in the shade again maintenance one day, namely obtain composite wood spray gun core;
6) dry in the shade maintenance after one day, choose V-arrangement anchoring piece, two V-arrangement anchoring piece and annulus anchoring piece, and these two kinds of anchoring pieces to be misplaced welding on the surface at rifle core crab, at V-arrangement anchoring piece top welding annulus anchoring piece;
7), after clearing up welding slag, the spraying of combination gun wicking surface or brushing refractory heat-insulating spray material prepare the heat shield liner that thickness is 3 ~ 10mm; After drying in the shade, load in casting mold, for refractory castable for desulfurizing spray gun pours into the bottom section of slipping into rifle lining, the mould material being main raw material(s) with fire-resistant reworked material again pours into top revealed section rifle lining, the demoulding after one day of mould internal oxidition, namely mould material lining is prepared, then natural curing 4 ~ 6 days, namely prepare fire proofed wood spray gun lining;
8) toast in above-mentioned prefabricated Spray gun model loading roaster 3 ~ 5 days under the condition of temperature 300 ~ 400 DEG C;
9) if winding-up mouth is the spray gun of steel pipe, spray gun baking is spray gun finished product and directly packs warehouse-in after coming out of the stove; If winding-up mouth is serve as a contrast bonding by carbon element pipe with metal pedestal and fire proofed wood spray gun with the multiple-unit tube carbon containing mud of carbon element pipe by metal pedestal, and local baking-curing, keep winding-up channels open, namely obtain spray gun finished product and pack warehouse-in.
Beneficial effect of the present invention is:
1, the present invention is by the optimization of spray gun preparation method, the making quality of the spray gun of the present invention of guarantee, and manufacture craft is easy, quality control is simple, process costs is cheap.
2, the present invention is by significantly reducing the comprehensive cost of manufacture of spray gun, is reduced to negative, reaches the low cost consumption-type object of spray gun by the recycling value of rear spray gun.The heat shield liner served as a contrast by the metallic substance of composite wood spray gun core and refractory materials compound and fire proofed wood spray gun and mould material serve as a contrast double-deck design; reduce the sprouting that fire proofed wood spray gun lining and composite wood spray gun core bonding surface thermal expansion structural stress and fire proofed wood spray gun serve as a contrast surface cracks; the thermal insulation protection of reinforced composite material rifle core and high temperature resistant property thereof; improve fire proofed wood spray gun and serve as a contrast radial thermal conduction resistance; reduce the radial temperature difference thermal stresses of mould material lining; slow down sprouting and the tempo of mould material lining crackle, object non-maintaining under reaching economical life condition.By the enforcement of spray gun preparation method of the present invention, the making quality of the spray gun of the present invention of guarantee, simplifies spray gun manufacture craft and quality control, reduces and makes materials consumption and manpower consumption, reduces the comprehensive cost of manufacture of spray gun further.By above-mentioned aggregate measures, finally realize the low cost of spray gun, consumption-type, non-maintaining target.
Accompanying drawing explanation
Fig. 1 is the two spout hot metal pretreatment spray gun structural representation of inverted T-shaped of the present invention
Fig. 2 is the two spout hot metal pretreatment spray gun B-B sectional view of inverted T-shaped of the present invention
Fig. 3 is hot metal pretreatment spray gun 1-1 partial enlarged drawing of the present invention
Fig. 4 is hot metal pretreatment spray gun metal spout 2-2 partial enlarged drawing of the present invention
Fig. 5 is hot metal pretreatment spray gun compound spout structure 2-2 partial enlarged drawing of the present invention
Fig. 6 is straight blowing-iron water pretreatment spray gun structure schematic diagram bottom the present invention
Fig. 7 is that the present invention falls Y shape three spout hot metal pretreatment spray gun structural representation
In figure, composite wood spray gun core 1, V-arrangement anchoring piece 2, annulus anchoring piece 3, fire proofed wood spray gun lining 4, heat shield liner 4.1, mould material lining 4.2, top revealed section rifle lining 4.21, the bottom section of slipping into rifle lining 4.22, joint flange 5, reinforcement gusset 6, rifle core crab 7, thin-walled internal lining pipe 7.1, axial steel bar 7.2, circumferential steel loop 7.3, lower cover 7.4, winding-up mouth 8, steel pipe 8.1, metal pedestal 8.2, carbon element pipe 8.3, plastic refractory 9, two V-arrangement anchoring piece 10.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
Embodiment 1:
As shown in figures 1-4: the two spout hot metal pretreatment spray gun of a kind of inverted T-shaped, comprise composite wood spray gun core 1, cover the fire proofed wood spray gun of composite wood spray gun core 1 periphery lining 4 and arrange above composite wood spray gun core 1 and be welded with joint flange 5, described joint flange 5 lower end internal surface is provided with several and strengthens gusset 6, and described rifle core crab 7 top is welded and fixed the connection for reinforced composite material rifle core 1 and joint flange 5 with reinforcement gusset 6.
Fire proofed wood spray gun lining 4 is included on rifle core crab 7 outer wall and scribbles heat shield liner 4.1, mould material lining 4.2 is also coated with outside described heat shield liner 4.1, when described mould material lining 4.2 is jet, molten iron level serves as a contrast 4.21 and the bottom section of slipping into rifle lining 4.22 by the top revealed section rifle of unlike material for interface, the mould material that described top revealed section rifle lining 4.21 is main raw material(s) with fire-resistant reworked material pours into rifle lining, and the bottom section of slipping into rifle lining 4.22 serves as a contrast for refractory castable for desulfurizing spray gun pours into rifle.
Described composite wood spray gun core 1 comprises internal layer rifle core crab 7, and on described rifle core crab 7 outer wall, Heterogeneous Permutation welding is provided with V-arrangement anchoring piece 2 and two V-arrangement anchoring piece 10, and described V-arrangement anchoring piece 2 top is welded with annulus anchoring piece 3,
Described rifle core crab 7 lower end sidewall is provided with lower cover 7.4, described rifle core crab 7 comprises inner thin-walled internal lining pipe 7.1 and is provided with multi-turn circumference steel loop 7.3 along stir shaft direction with outside, multi-turn circumference steel loop 7.3 is uniformly distributed vertically, and axial spacing is respectively 40 ~ 200mm and 10 ~ 100mm and distributes.
Outside described thin-walled internal lining pipe 7.1, centered by axis, line is evenly arranged many for connecting the axial steel bar 7.2 of circumferential steel loop 7.3 in emitting shape from inside to outside,
Thin-walled internal lining pipe 7.1 is plain carbon stool Thin-walled Straight seam welded tube or spiral welded tube, and wall thickness is 3 ~ 5mm, and internal diameter is responsible for equal with conventional lance metal gun core.
Axial steel bar 7.2 adopts steel plate shearing or the preparation of commercially available band iron or prepares, and its thickness is 3 ~ 8mm, is highly 5 ~ 15mm, and axial steel bar 7.2 adopts straight carbon steel Twisted Steel, wire rod, hand-drawn wire to prepare; Its external diameter is 4 ~ 15mm, and length is identical with thin-walled internal lining pipe 7.1.
Circumference steel loop 7.3 adopts thickness to be that 3 ~ 10mm steel plate makes, and axial height is 20 ~ 50mm, and straight carbon steel wire rod, hand-drawn wire also can be adopted to prepare, and its external diameter is 3 ~ 6mm;
Plastic refractory 9 is filled with in described rifle core crab 7.Wherein, plastic refractory 9 is that phosphate-bonded aluminum silicon carbide carbonaceous is moldable.
Described lower cover 7.4 upper horizontal is provided with two winding-up mouths 8 communicated with thin-walled internal lining pipe 7.1, and winding-up mouth 8 is steel pipe 8.1, and steel pipe 8.1 is fixedly welded in rifle core crab 7 and fire proofed wood spray gun lining 4.
The two spout hot metal pretreatment spray gun of inverted T-shaped comprises the following steps:
1) metallic substance selecting above-mentioned parts to need, according to the structural parameter of the above-mentioned spray gun of preparation, each metal parts of processing and fabricating spray gun also eliminates rust for subsequent use;
2) chosen axis is to steel bar 7.2, and its line centered by axis is fixed in emitting shape uniform welding on thin-walled internal lining pipe 7.1 outer wall from inside to outside, choose circumferential steel loop, be uniformly distributed vertically and be weldingly fixed on axial steel bar surface, if thin-walled internal lining pipe 7.1 lower port not with winding-up mouth 8 coaxial communication, then need the shutoff of welding lower cover 7.4; Namely rifle core crab 7 is prepared;
3) process in the lower end of thin-walled internal lining pipe 7.1 two with the supporting Link Port of winding-up mouth 8, and welding is communicated with winding-up mouth steel pipe 8.1;
4) joint flange 1 is welded with rifle core crab 7 upper end communicate, and weld polylith and strengthen gusset 6 for reinforcement by connection;
5) welding slag and scum silica frost is cleared up, after, carrying out the resistance to air loss checking weldment blast pass passage, by floating for moldable for the phosphate-bonded aluminum silicon carbide carbonaceous ramming that carries out, dense packing effect in rifle core crab 7 weldment space, and guarantees that ramming charge level height is identical with metal steel loop 7.3, namely prepares plastic refractory 9, naturally to dry in the shade again maintenance one day, namely obtain composite wood spray gun core 1;
6) dry in the shade maintenance after one day, choose V-arrangement anchoring piece 2, two V-arrangement anchoring piece 10 and annulus anchoring piece 3, and these two kinds of anchoring pieces to be misplaced welding on the surface at rifle core crab 7, at V-arrangement anchoring piece 2 top welding annulus anchoring piece 3;
7), after clearing up welding slag, rifle core crab 7 surface spraying or brushing refractory heat-insulating spray material prepare the heat shield liner 4.1 that thickness is 3 ~ 10mm; After drying in the shade, load in casting mold, for refractory castable for desulfurizing spray gun pours into the bottom section of slipping into rifle lining 4.22, the mould material being main raw material(s) with fire-resistant reworked material again pours into top revealed section rifle lining 4.21, the demoulding after one day of mould internal oxidition, namely mould material lining 4.2 is prepared, then natural curing 4 ~ 6 days, namely prepare fire proofed wood spray gun lining 4;
8) toast in above-mentioned prefabricated Spray gun model loading roaster 3 ~ 5 days under the condition of temperature 300 ~ 400 DEG C;
9) if winding-up mouth 8 is the spray gun of steel pipe 8.1, spray gun baking is spray gun finished product and directly packs warehouse-in after coming out of the stove.
All have a detailed description in the important step and raw material of preparing the two spout hot metal pretreatment spray gun of inverted T-shaped, other step and raw material belong to prior art.
Embodiment 2
As Fig. 1,2, shown in 3 with 5: the present embodiment is substantially identical with the structure of embodiment 1, and difference is:
Described winding-up mouth 8 is that metal pedestal 8.2 prepares the multiple-unit tube of compound with carbon element pipe 8.3, and metal pedestal is fixedly welded on rifle core crab 7, and described carbon element pipe 8.3 one end is fixed in metal pedestal by carbon mud, and the other end is fixed in fire proofed wood spray gun lining 4 by carbon mud.
Embodiment 3
As shown in Fig. 2,3 and 6: hot metal pretreatment spray gun is directly blown in a kind of bottom, and the present embodiment is substantially identical with the structure of embodiment 1, and difference is: arranging bottom described composite wood spray gun core 1 singlely has the winding-up mouth 8 communicated with thin-walled internal lining pipe 7.1.
Embodiment 4
As shown in Fig. 2,3 and 6: a kind of Y shape three spout hot metal pretreatment spray gun, the present embodiment is substantially identical with the structure of embodiment 1, difference is: winding-up mouth 8 is three and winding-up mouth 8, and axis and thin-walled internal lining pipe 7.1 axis angle of winding-up mouth 8 are less than 90 °.
Other unspecified part is prior art.Although above-described embodiment is to invention has been detailed description; but it is only the present invention's part embodiment; instead of whole embodiment, people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments all belong to scope.
Claims (3)
1. a non-maintaining low-cost molten iron pretreatment spray lance, comprise composite wood spray gun core (1), cover fire proofed wood spray gun lining (4) of composite wood spray gun core (1) periphery and the joint flange (5) of composite wood spray gun core (1) top is set, described composite wood spray gun core (1) comprises internal layer rifle core crab (7), on described rifle core crab (7) outer wall, Heterogeneous Permutation welding is provided with V-arrangement anchoring piece (2) and two V-arrangement anchoring piece (10), described V-arrangement anchoring piece (2) top is welded with annulus anchoring piece (3), described rifle core crab (7) lower end sidewall is provided with lower cover (7.4), it is characterized in that: described rifle core crab (7) comprises inner thin-walled internal lining pipe (7.1) and the outside axis direction along rifle core crab (7) is provided with multi-turn circumference steel loop (7.3), multi-turn circumference steel loop (7.3) is uniformly distributed vertically, described thin-walled internal lining pipe (7.1) outside line centered by axis is evenly arranged many for connecting the axial steel bar (7.2) of circumferential steel loop (7.3) in emitting shape from inside to outside, plastic refractory (9) is filled with in described rifle core crab (7),
Described fire proofed wood spray gun lining (4) is included on rifle core crab (7) outer wall and scribbles heat shield liner (4.1), described heat shield liner (4.1) outside is also coated with mould material lining (4.2), when described mould material lining (4.2) is to jet, molten iron level serves as a contrast (4.21) and the bottom section of slipping into rifle lining (4.22) by the top revealed section rifle of unlike material for interface, described top revealed section rifle lining (4.21) pours into rifle lining with the mould material that fire-resistant reworked material is main raw material(s), the bottom section of slipping into rifle lining (4.22) serves as a contrast for refractory castable for desulfurizing spray gun pours into rifle,
Described joint flange (5) lower end internal surface is provided with several and strengthens gusset (6), described rifle core crab (7) top and joint flange (5) and strengthen gusset (6) and be welded and fixed;
Described lower cover (7.4) top is provided with the winding-up mouth (8) communicated with thin-walled internal lining pipe (7.1), and described winding-up mouth (8) is horizontally disposed with or the axis of mouth of jetting (8) and thin-walled internal lining pipe (7.1) axis angle are less than 90 °;
Described composite wood spray gun core (1) bottom is provided with the winding-up mouth (8) communicated with thin-walled internal lining pipe (7.1);
Described winding-up mouth (8) prepares the multiple-unit tube of compound for steel pipe (8.1) or metal pedestal (8.2) and carbon element pipe (8.3), described steel pipe (8.1) is fixedly welded in rifle core crab (7) and fire proofed wood spray gun lining (4), described metal pedestal is fixedly welded on rifle core crab (7), described carbon element pipe (8.3) one end is fixed in metal pedestal by carbon mud, and the other end is fixed in fire proofed wood spray gun lining (4) by carbon mud.
2. non-maintaining low-cost molten iron pretreatment spray lance according to claim 1, is characterized in that: described plastic refractory (9) for phosphate-bonded aluminum silicon carbide carbonaceous moldable.
3. a preparation method for the non-maintaining low-cost molten iron pretreatment spray lance of claim 1, is characterized in that: comprise the following steps:
1) metallic substance selecting above-mentioned parts to need, according to the structural parameter of the above-mentioned spray gun of preparation, each metal parts of processing and fabricating spray gun also eliminates rust for subsequent use;
2) chosen axis is to steel bar (7.2), and its line centered by axis is fixed in emitting shape uniform welding on thin-walled internal lining pipe (7.1) outer wall from inside to outside, choose circumferential steel loop, be uniformly distributed vertically and be weldingly fixed on axial steel bar surface, if thin-walled internal lining pipe (7.1) lower port not with winding-up mouth (8) coaxial communication, then need weld lower cover (7.4) shutoff; Namely rifle core crab (7) is prepared;
3) at the Link Port that the processing of the lower end of thin-walled internal lining pipe (7.1) is supporting with winding-up mouth (8), and welding is communicated with winding-up mouth steel pipe (8.1) or metal pedestal (8.2);
4) joint flange (1) is welded with rifle core crab (7) upper end communicate, and weld polylith and strengthen gusset (6) for reinforcement by connection;
5) welding slag and scum silica frost is cleared up, after, carrying out the resistance to air loss checking weldment blast pass passage, by floating for moldable for the phosphate-bonded aluminum silicon carbide carbonaceous ramming that carries out, dense packing effect in rifle core crab (7) weldment space, and guarantees that ramming charge level height is identical with metal steel loop (7.3), namely prepares plastic refractory (9), naturally to dry in the shade again maintenance 1 day, namely obtain composite wood spray gun core (1);
6) maintenance is dried in the shade after 1 day, choose V-arrangement anchoring piece (2), two V-arrangement anchoring piece (10) and annulus anchoring piece (3), and these two kinds of anchoring pieces to be misplaced welding on the surface at rifle core crab (7), on V-arrangement anchoring piece (2) top welding annulus anchoring piece (3);
7), after clearing up welding slag, composite wood spray gun core (1) surface spraying or brushing refractory heat-insulating spray material prepare the heat shield liner (4.1) that thickness is 3 ~ 10mm; After drying in the shade, load in casting mold, for refractory castable for desulfurizing spray gun pours into the bottom section of slipping into rifle lining (4.22), the mould material being main raw material(s) with fire-resistant reworked material again pours into top revealed section rifle lining (4.21), the demoulding behind mould internal oxidition (1) sky, namely mould material lining (4.2) is prepared, then natural curing 4 ~ 6 days, namely prepare fire proofed wood spray gun lining (4);
8) toast in above-mentioned prefabricated Spray gun model loading roaster 3 ~ 5 days under the condition of temperature 300 ~ 400 DEG C;
9) if the spray gun that winding-up mouth (8) is steel pipe (8.1), spray gun baking is spray gun finished product and directly packs warehouse-in after coming out of the stove; If winding-up mouth is by the multiple-unit tube of metal pedestal (8.2) with carbon element pipe (8.3), with carbon containing mud, carbon element pipe (8.3) and metal pedestal (8.2) and fire proofed wood spray gun are served as a contrast (4) bonding, and local baking-curing, keep winding-up channels open, namely obtain spray gun finished product and pack warehouse-in.
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| CN107096913B (en) * | 2017-05-25 | 2019-06-18 | 武汉钢铁有限公司 | Hot-metal bottle dry slag cut off device and preparation method |
| CN107881288B (en) * | 2017-12-25 | 2024-03-15 | 武汉科技大学 | Converter sublance body based on double-layer refractory material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037717A (en) * | 2007-04-27 | 2007-09-19 | 武汉钢铁(集团)公司 | Molten iron spraying desulfurization spraying gun |
| CN101544504A (en) * | 2009-05-08 | 2009-09-30 | 巩义市金岭耐火材料有限公司 | Phosphate-bonded aluminum silicon carbide brick and preparation method thereof |
| CN202543238U (en) * | 2012-04-05 | 2012-11-21 | 武汉钢铁(集团)公司 | Integrated molten iron pre-treating spray gun |
| CN203096107U (en) * | 2013-02-07 | 2013-07-31 | 武汉钢铁(集团)公司 | Blowing desulfurization spray gun for torpedo ladle |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037717A (en) * | 2007-04-27 | 2007-09-19 | 武汉钢铁(集团)公司 | Molten iron spraying desulfurization spraying gun |
| CN101544504A (en) * | 2009-05-08 | 2009-09-30 | 巩义市金岭耐火材料有限公司 | Phosphate-bonded aluminum silicon carbide brick and preparation method thereof |
| CN202543238U (en) * | 2012-04-05 | 2012-11-21 | 武汉钢铁(集团)公司 | Integrated molten iron pre-treating spray gun |
| CN203096107U (en) * | 2013-02-07 | 2013-07-31 | 武汉钢铁(集团)公司 | Blowing desulfurization spray gun for torpedo ladle |
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Effective date of registration: 20170726 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |