CN101337210A - Angle-inserting type hot metal pretreatment spray gun - Google Patents
Angle-inserting type hot metal pretreatment spray gun Download PDFInfo
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- CN101337210A CN101337210A CNA2008100485863A CN200810048586A CN101337210A CN 101337210 A CN101337210 A CN 101337210A CN A2008100485863 A CNA2008100485863 A CN A2008100485863A CN 200810048586 A CN200810048586 A CN 200810048586A CN 101337210 A CN101337210 A CN 101337210A
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Abstract
The invention discloses an inclined-inserting hot metal pretreatment spraying gun, which is used for jetting treatment for hot metal on a mixing bogie with torpedo retort. The spraying gun comprises a gun core steel pipe, a gun lining made of refractory material, and a plurality of rivet clasping pieces; the lower end of the gun core steel pipe tilts and forms an included angle of 120 to 140 degrees with the longitudinal axial line of the gun core steel pipe; the outer surface of the gun core steel pipe is covered with the gun lining made of the refractory material; each rivet clasping piece is composed of a V-shaped rivet clasping piece, a double-V butterfly-shaped rivet clasping piece and an annular rivet clasping piece, wherein the V-shaped rivet clasping piece and the double-V butterfly-shaped rivet clasping piece are respectively arranged in a working lining made of the refractory material at intervals along the circumferential direction and the axial direction of the gun core steel pipe, and welded with the external circumference surface of the gun core steel pipe; the annular rivet clasping piece is welded at the outer end of the V-shaped rivet clasping piece; the outer surface of the gun core steel pipe is coated with a burning weight-loss coating layer formed by mechanical lubricating oil and polypropylene powder, wherein the weight percentage of the mechanical lubricating oil is 90 to 99 percent, and the weight percentage of the polypropylene powder is 1 to 10 percent. Finally, the purposes of prolonging the service life of the spray gun and improving the service performance of the spray gun are achieved.
Description
Technical field
The present invention relates to a kind of angle-inserting type hot metal pretreatment spray gun, specifically a kind of molten iron winding-up preliminary treatment spray gun that is used on the torpedo jar torpedo hot metal mixer car.
Background technology
The ATH method of having used was studied successfully and dropped in former West Germany Thyssen Aktiengesellschaft in 1970, it is gone into the spray gun of an outer lining refractories in the torpedo jar torpedo hot metal mixer car from the horizontal by 60 ° of angle oblique cuttings, it is composite desulfurizing agent that per minute is blown into 108 kilograms of CaC, processing time is about 8 minutes, the conveying gas pressure is 6atm, and pulvis concentration is 40-60kg/Nm3.China's Baosteel has also adopted this spray gun angle-inserting type hot metal winding-up pretreating process on torpedo jar torpedo hot metal mixer car.
On spray gun angle-inserting type hot metal winding-up pretreatment system, the spray gun of early stage design is a cylindrical straight rifle structure, and the rifle core is a steel pipe, and outer wall of steel pipe welding V-type anchoring piece is wrapped up in fire proofed wood spray gun lining outward.When the winding-up preliminary treatment, spray gun is gone in the torpedo jar torpedo hot metal mixer car from the horizontal by 60 ° of angle oblique cuttings, by carrier gas the solid pretreating agent is sprayed into the molten iron depths, finishes the molten iron preliminary treatment.In actual applications, there is the short problem of badly broken, service life in spray gun, shows as mainly that spray gun bending, the wearing and tearing of rifle lining, rifle lining thermal shock be full of cracks are peeled off, spray gun burns, the wearing and tearing of rifle head, the ablation of steel pipe spout etc.At above-mentioned deficiency, Chinese patent: " hot metal pretreatment spray gun, the patent No.: ZL99227640.3 " provides a kind of hot metal pretreatment spray gun, wrapped up in refractory masses outward and constituted by steel pipe, and the cross section that it is characterized in that spray gun is a convex polygon.Bind the layer of steel wire net between steel pipe and the refractory masses.The winding-up end is bending, and the winding-up end is 100～145 degree with the span of the bending angle of spray gun.Winding-up mouthful be the flat elliptic structure, and this patent is by spray gun cross section employing convex polygon, and practicable horizontal moulding by casting has reduced the manufacture difficulty and the cost of cylindrical spray gun vertical pouring significantly; By the design in convex polygon spray gun cross section, by the increase of the strong eroded area rifle lining of spray gun local thickness, improve the antiscour wearing and tearing ability of spray gun, reduce spray gun weight (weight has only 80 kilograms), reach the purpose that reduces the spray gun refractory consumption rate; The mode of arranging the layer of steel wire net outward by the cancellation and the steel pipe of V-arrangement riveting component, avoided the V-arrangement riveting component to expand to the harm of fire proofed wood spray gun lining, strengthened adhering to of fire proofed wood spray gun lining, and, alleviated steel pipe and expanded the destruction of fire proofed wood spray gun lining by relatively moving between steel pipe and the steel wire; Winding-up end is the structure of bending, is convenient to the circle round formation of eddy current of molten iron, and it is abundant and even that the pulvis that sprays into is mixed with molten iron.Design by flat elliptic structure winding-up mouth has prevented that molten iron pours in down a chimney the steel pipe spout scaling loss that causes under the little winding-up amount condition.Thereby this patent is compared with former design spray gun has the advantage that alleviates spray gun weight, reduction cost of manufacture, increases the service life, improves pretreating effect.In addition, Chinese patent " slag line elasticity gasket ring molten iron preliminary treatment oxygen blast spray gun; the patent No.: ZL200620048341.7 " proposes a kind of slag line elasticity gasket ring molten iron preliminary treatment oxygen blast spray gun, be prone to the annular crack of anti-the material, the shortcoming of the melting loss of anti-material the, cracking and spray gun core perforating steel pipe with the slag lining that overcomes existing spray gun.Its technical scheme is on the basis of above-mentioned patent, thicken the refractory masses of slag lining, and arrange one section elasticity iron wire gasket ring between the steel pipe of slag lining outside steel pipe rifle core and extension site, both sides thereof and the iron wire bag net, this iron wire gasket ring internal diameter is slightly larger than diameter of steel tube.The iron wire diameter of elasticity iron wire gasket ring is 2.5～3.5mm, and the number of turns is 8～15 circles, and width is 500～1000mm.By thickening the refractory masses of slag lining, the raising slag line is anti-to melt the damage ability, by the setting of elasticity iron wire gasket ring, alleviates the thermal stress between steel pipe and the anti-material, finally reaches to prolong the spray gun purpose in service life.
At actual process condition and the damaged situation of torpedo jar torpedo hot metal mixer car molten iron winding-up preliminary treatment with angle-inserting type spray gun spray gun service intermittent, above-mentioned two utility model patents winding-up end is the bending structure and has played the effect of improving preliminary treatment pulvis and molten iron mixed effect; Steel wire integument and elasticity iron wire gasket ring have been alleviated the thermal stress between steel pipe and the anti-material to a certain extent, have played the certain effect that delays the spray gun breakage; Thickening of slag lining refractory masses improved the anti-melting loss ability of slag line.But problems such as bending, the wearing and tearing of rifle head, spray gun about spray gun wear and tear, thermal shock is chapped and peel off do not propose concrete otherwise effective technique measure, simultaneously, the convex polygon structure of spray gun cross section will cause that the localized heat stress of fire proofed wood spray gun lining is concentrated, cause the breakage of rifle lining thermal stress and peel off.
Summary of the invention
Technical problem to be solved by this invention is to solve spray gun low, the bad problem of winding-up pretreating effect in service life.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of angle-inserting type hot metal pretreatment spray gun, comprise rifle core steel pipe, fire proofed wood spray gun lining and some riveting components, the lower end of rifle core steel pipe tilts and is 120～140 degree with the longitudinal axis angle of rifle core steel pipe, described fire proofed wood spray gun lining covers on the outer surface of rifle core steel pipe, be coated with the burning of forming by machine oil and polypropylene powder on the outer surface of described rifle core steel pipe and lose coating, wherein, the percentage by weight of machine oil is 90～99%, and the percentage by weight of polypropylene powder is 1～10%.
In the such scheme, described riveting component is made up of V-arrangement riveting component, two V butterfly riveting component and annulus riveting component, little 3～the 4mm of thickness of the aspect ratio fire proofed wood spray gun lining of V-arrangement riveting component, the height of two V butterfly riveting components is 1/2～2/3 of the thickness of fire proofed wood spray gun lining, V-arrangement riveting component and two V butterfly riveting components respectively along rifle core steel pipe circumferentially be arranged in the refractory material working lining with axially spaced-apart and with the outer circumference surface welding of rifle core steel pipe, little 3～4mm of thickness that annulus riveting component internal diameter serves as a contrast than fire proofed wood spray gun and the outer end that is welded on the V-arrangement riveting component.
The material of described V-arrangement riveting component, two V butterfly riveting component and annulus riveting component is a heat-resistant alloy wire.
Described V-arrangement riveting component, two V butterfly riveting component are welded on the outer surface of rifle core steel pipe by rifle core steel pipe axial spacing 40～80mm, circumferential 60 ° of intervals of angle.
Described rifle core steel pipe is a pipe, and material is the ordinary carbon steel seamless pipe.
The present invention is according to the characteristics of spray gun metal material and castable refractory complex structure and the use of spray gun batch (-type), from the harm that reduces structural stress, prolong the spray gun angle in service life, the formation of the hot state under the spray gun service condition and thermal stress alternation process, complex structure stress, the many-sides such as spray gun preparation technology of rifle core recycling are studied, thought that spray gun complex structure stress is to cause that the spray gun crackle peels off, burns, major cause of failure; Rifle lining refractories thermal shock resistance can be the main cause that causes that the be full of cracks of rifle lining is peeled off; The structure of rifle core riveting component and arrangement are the main causes that causes that spray gun refractory casting spray gun lining structure peels off; The comprehensive strength of spray gun and rigidity are to cause spray gun bending, the main cause that fractures.The contour structures of rifle head is to cause the lining wearing and tearing of rifle head fire proofed wood spray gun, peel off the main cause with steel pipe spout scaling loss.For this reason, the present invention has taked to burn the measure of losing coating in the brushing of rifle core steel tube surface, burn the residual slight gap of mistake by spray gun bake process floating coat, thermal expansion between buffering rifle core steel pipe and the fire proofed wood spray gun lining is asynchronous, reduce the harm of spray gun complex structure stress, and the function of heat insulation by slight gap, reduce the integrated temperature of rifle core steel pipe under the service condition, improve the intensity and the rigidity of rifle core steel pipe.Lose coating by the burning that machine oil and polypropylene powder are formed, even brushing and the burning under the normal baking temperature of spray gun of being convenient to coating are lost.Take highly different V-arrangements and two V butterfly riveting components, strengthen the bond strength between rifle core steel pipe and the fire proofed wood spray gun lining, improve the comprehensive strength and the rigidity of spray gun, prevent spray gun flexural deformation; Take the annular riveting component, strengthen the globality of rifle lining, improve the abrasion resistance on rifle lining top layer, and induce and peptizaiton, improve the thermal shock resistance of rifle lining by the crackle of annular riveting component; Make the riveting component of different structure form by taking heat-resistant alloy wire, the heat resistance and the high-temperature oxidation resistance of riveting component have been strengthened, prolonged the action time that riveting component strengthens, the sintering process that serves as a contrast ecto-entad for the fire proofed wood spray gun provides time enough, has strengthened the improvement and the resisting breakage ability of rifle lining refractories institutional framework.Circular spray gun cross section has been avoided the thermal stress concentrated rifle lining that causes in irregular section to peel off and has been chapped.The outer surface rounding off of the sloping portion of spray gun lower end and the vertical component of spray gun induces the circle round eddy current and winding-up carrier gas and pulvis of molten iron to float, and has slowed down rifle end surface erosive wear process; Rifle head center line is the warp architecture of level, has increased the operating distance and the stirring region of winding-up jet, has improved the mixed effect of winding-up carrier gas and pulvis and molten iron.Spray gun rifle lining is taked the vertical integrated poured molding mode of " refractory castable for desulfurizing spray gun, the patent No.: ZL03118869.9 " patented product, has improved the performance uniformity and the resisting breakage ability of spray gun cross section fire proofed wood spray gun lining.By above-mentioned measure, finally reach the purpose that prolongs spray gun service life, improves the winding-up pretreating effect.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A portion enlarged drawing of Fig. 1;
Fig. 3 is two V butterfly riveting component perspective view.
The specific embodiment
Below in conjunction with specific embodiment the present invention is made detailed explanation.
Embodiment one,
As shown in Figure 1 and Figure 2, the present invention includes rifle core steel pipe 1, fire proofed wood spray gun lining 6 and some riveting components, rifle core steel pipe 1 is seamless pipe, material is an ordinary carbon steel, its lower end tilt and with the longitudinal axis angle α of rifle core steel pipe 1 be 120 degree, described fire proofed wood spray gun lining 6 covers on the outer surface of rifle core steel pipe 1, and being coated with on the outer surface of described rifle core steel pipe 1 by percentage by weight is that the burning that 98% machine oil and 2% polypropylene powder are formed is lost coating 2.Described riveting component is made up of V-arrangement riveting component 3, two V butterfly riveting component 4 and annulus riveting component 5, the little 4mm of thickness of the aspect ratio fire proofed wood spray gun lining 6 of V-arrangement riveting component 3, the height of two V butterfly riveting components 4 is 2/3 of the thickness of fire proofed wood spray gun lining 6, annulus riveting component 5 internal diameters are than the little 3.5mm of thickness of fire proofed wood spray gun lining 6, V-arrangement riveting component 3, two V butterfly riveting component 4 are by rifle core steel pipe axial spacing 40mm, 60mm or 80mm, circumferentially 60 ° of intervals of angle are welded on the outer surface of rifle core steel pipe, and annulus riveting component 5 is welded on the outer end of V-arrangement riveting component 3.The material of V-arrangement riveting component 3, two V butterfly riveting component 4 and annulus riveting component 5 is a heat-resistant alloy wire, and diameter is 3mm.The outer surface rounding off of the sloping portion of spray gun lower end and the vertical component of spray gun.Spray gun fire proofed wood spray gun lining 6 is taked the vertical integrated poured moulding of " refractory castable for desulfurizing spray gun, the patent No.: ZL03118869.9 " patented product, and the spray gun cross section is a circular configuration.
Wherein, two V butterfly riveting components 4 are to be welded to each other by two V font summits that are positioned at the V-arrangement riveting component on orthogonal plane to form.
Embodiment two,
The difference of present embodiment and embodiment one is that the longitudinal axis angle α of rifle core steel pipe 1 lower end sloping portion and rifle core steel pipe 1 is 140 degree; It is that 92% machine oil and 8% polypropylene powder are formed by percentage by weight that described burning is lost coating 2; The little 3mm of thickness of the aspect ratio fire proofed wood spray gun lining 6 of V-arrangement riveting component 3, the height of two V butterfly riveting components 4 is 1/2 of the thickness of fire proofed wood spray gun lining 6, annulus riveting component 5 internal diameters are than the little 3mm of thickness of fire proofed wood spray gun lining 6, the diameter of V-arrangement riveting component 3, two V butterfly riveting component 4 and annulus riveting component 5 is 2.5mm, and V-arrangement riveting component 3, two V butterfly riveting component 4 are welded on the outer wall of rifle core steel pipe 1 by rifle core steel pipe axial spacing 40mm, 60mm or 80mm.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (5)
1, a kind of angle-inserting type hot metal pretreatment spray gun, comprise rifle core steel pipe (1), fire proofed wood spray gun lining (6) and some riveting components, the lower end of rifle core steel pipe (1) tilts and is 120～140 degree with the longitudinal axis angle of rifle core steel pipe (1), described fire proofed wood spray gun lining (6) covers on the outer surface of rifle core steel pipe (1), it is characterized in that: be coated with the burning of forming by machine oil and polypropylene powder on the outer surface of described rifle core steel pipe (1) and lose coating (2), wherein, the percentage by weight of machine oil is 90～99%, and the percentage by weight of polypropylene powder is 1～10%.
2, angle-inserting type hot metal pretreatment spray gun as claimed in claim 1, it is characterized in that described riveting component is by V-arrangement riveting component (3), two V butterfly riveting components (4) and annulus riveting component (5) are formed, little 3～the 4mm of thickness of the aspect ratio fire proofed wood spray gun lining (6) of V-arrangement riveting component (3), the height of two V butterfly riveting components (4) is 1/2～2/3 of the thickness of fire proofed wood spray gun lining (6), V-arrangement riveting component (3) and two V butterfly riveting component respectively along rifle core steel pipe (1) circumferentially be arranged in the refractory material working lining (7) with axially spaced-apart and with the outer circumference surface welding of rifle core steel pipe (1), annulus riveting component (5) internal diameter serves as a contrast the little 2～4mm of thickness of (6) than fire proofed wood spray gun and is welded on the outer end of V-arrangement riveting component (3).
3, angle-inserting type hot metal pretreatment spray gun as claimed in claim 2 is characterized in that the material of V-arrangement riveting component (3), two V butterfly riveting components (4) and annulus riveting component (5) is a heat-resistant alloy wire.
4,, it is characterized in that described V-arrangement riveting component (3), two V butterfly riveting components (4) are welded on the outer surface of rifle core steel pipe (1) by rifle core steel pipe (1) axial spacing 40～80mm, circumferential 60 ° of intervals of angle as claim 2 or 3 described angle-inserting type hot metal pretreatment spray guns.
5, angle-inserting type hot metal pretreatment spray gun as claimed in claim 1 is characterized in that described rifle core steel pipe (1) is a pipe, and material is the ordinary carbon steel seamless pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100485863A CN101337210B (en) | 2008-07-28 | 2008-07-28 | Angle-inserting type hot metal pretreatment spray gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100485863A CN101337210B (en) | 2008-07-28 | 2008-07-28 | Angle-inserting type hot metal pretreatment spray gun |
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| CN101337210A true CN101337210A (en) | 2009-01-07 |
| CN101337210B CN101337210B (en) | 2011-05-25 |
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| CN2008100485863A Expired - Fee Related CN101337210B (en) | 2008-07-28 | 2008-07-28 | Angle-inserting type hot metal pretreatment spray gun |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786159A (en) * | 2010-03-30 | 2010-07-28 | 武汉钢铁(集团)公司 | Slant-insert type molten iron pretreatment lance and manufacturing method thereof |
| CN101824509A (en) * | 2010-05-18 | 2010-09-08 | 上海彭浦特种耐火材料厂 | Improvement on spray gun core structure for molten iron pretreatment |
| 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 |
| CN102676719A (en) * | 2012-04-30 | 2012-09-19 | 莱芜钢铁集团有限公司 | Novel blast furnace oxygen coal lance |
| CN103114174A (en) * | 2013-03-07 | 2013-05-22 | 武汉钢铁(集团)公司 | Blowing desulfurization method for molten iron of torpedo ladle |
| CN103388055A (en) * | 2013-08-07 | 2013-11-13 | 武汉钢铁(集团)公司 | Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure |
-
2008
- 2008-07-28 CN CN2008100485863A patent/CN101337210B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786159A (en) * | 2010-03-30 | 2010-07-28 | 武汉钢铁(集团)公司 | Slant-insert type molten iron pretreatment lance and manufacturing method thereof |
| CN101824509A (en) * | 2010-05-18 | 2010-09-08 | 上海彭浦特种耐火材料厂 | Improvement on spray gun core structure for molten iron pretreatment |
| 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 |
| CN102154533B (en) * | 2011-05-09 | 2012-07-25 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| CN102676719A (en) * | 2012-04-30 | 2012-09-19 | 莱芜钢铁集团有限公司 | Novel blast furnace oxygen coal lance |
| CN103114174A (en) * | 2013-03-07 | 2013-05-22 | 武汉钢铁(集团)公司 | Blowing desulfurization method for molten iron of torpedo ladle |
| CN103114174B (en) * | 2013-03-07 | 2015-02-18 | 武汉钢铁(集团)公司 | Blowing desulfurization method for molten iron of torpedo ladle |
| CN103388055A (en) * | 2013-08-07 | 2013-11-13 | 武汉钢铁(集团)公司 | Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure |
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| CN101337210B (en) | 2011-05-25 |
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