CN104099442B - A kind of method for arranging of bottom blowing gun for converter and top and bottom combined blown converter - Google Patents
A kind of method for arranging of bottom blowing gun for converter and top and bottom combined blown converter Download PDFInfo
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- CN104099442B CN104099442B CN201410338945.4A CN201410338945A CN104099442B CN 104099442 B CN104099442 B CN 104099442B CN 201410338945 A CN201410338945 A CN 201410338945A CN 104099442 B CN104099442 B CN 104099442B
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Abstract
The invention discloses a kind of method for arranging and top and bottom combined blown converter of bottom blowing gun for converter, obtain N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer, adopt this method for arranging, Simplified flowsheet can be achieved, improve converter output, and the technique effect of good bottom blowing effect can be realized.
Description
Technical field
The present invention relates to converter steeling technology field, be specifically related to a kind of method for arranging and top and bottom combined blown converter of bottom blowing gun for converter.
Background technology
Along with smelting iron and steel technology development, in the process of converter steelmaking, bottom blowing gun for converter assigns in the middle of the furnace lining of converter bottom, in converter steelmaking process, be blown into high pressure gas from bottom blowing gun, molten steel is stirred, to ensure good chemical reaction effect, thus improve the quality of steel.
But, prior art is in order to ensure the bottom blowing effect in the full stove labour phase, what adopt is the technique of quick change bottom blowing brick, in the process of building stove, building by laying bricks or stones of bottom blowing brick adopts chamotte to seal with furnace lining part, when the air permeable effect of bottom blowing brick is difficult to ensure, the technique of boring is adopted to take out bottom blowing brick, the bottom blowing brick more renewed, and seal with chamotte, it is respond well that this technique can reach bottom blowing within a stove labour phase, but before replacing bottom blowing brick, need to adopt the technique of boring to remove old bottom blowing gun, due to the residual steel in old bottom blowing gun and stove, residue is closely linked with mechanism, therefore to hole difficulty, waste time and energy, change inconvenient, and need blowing out in replacing bottom blowing, affect the converter producing time, cause the problem of the output reducing converter.
Summary of the invention
The embodiment of the present application is by providing a kind of method for arranging and top and bottom combined blown converter of bottom blowing gun for converter, bottom blowing gun difficulty is changed during for solving in prior art and existing and adopt the technique of quick change bottom blowing brick, the technical problem that converter output reduces, and good bottom blowing effect can be realized.
The embodiment of the present application provides a kind of method for arranging of bottom blowing gun for converter, obtain N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer.
Optionally, obtain 3 groups of bottom blowing guns, each the group bottom blowing gun in described 3 groups of bottom blowing guns comprises the identical bottom blowing gun of 4 length.
Optionally, described 3 groups of bottom blowing guns comprise first group of bottom blowing gun, second group of bottom blowing gun and the 3rd group of bottom blowing gun, the length of each bottom blowing gun of described first group of bottom blowing gun is 900-1200mm, the length of each bottom blowing gun of described second group of bottom blowing gun is 500-1000mm, and the length of each bottom blowing gun of described 3rd group of bottom blowing gun is 250-800mm.
Optionally, the length of the bottom blowing gun in described first group of bottom blowing gun is greater than the length of the bottom blowing gun in described second group of bottom blowing gun, and the length of the bottom blowing gun in described second group of bottom blowing gun is greater than the length of the bottom blowing gun in described 3rd group of bottom blowing gun.
Optionally, the top of each the bottom blowing chamber rifle in described second group of bottom blowing gun and described 3rd group of bottom blowing gun is provided with the aluminium flake for covering end muzzle.
Optionally, each bottom blowing gun in described 3 groups of bottom blowing guns is arranged on on described converter bottom mid-point two concentric(al) circless that are the center of circle.
Optionally, the first concentrically ringed diameter in described two concentric(al) circless is 1500-2000mm and second concentrically ringed diameter is 1900-2800mm.
Optionally, described first concentric(al) circles is provided with a bottom blowing gun in described first group of bottom blowing gun, two bottom blowing guns in a bottom blowing gun in described second group of bottom blowing gun and described 3rd group of bottom blowing gun, and three bottom blowing guns described second concentric(al) circles is provided with in described first group of bottom blowing gun, two bottom blowing guns in three bottom blowing guns in described second group of bottom blowing gun and described 3rd group of bottom blowing gun.
Optionally, all bottom blowing guns in described three groups of bottom blowing guns are symmetrically distributed in the both sides of tap hole and described converter bottom mid-point line.
The application another embodiment still provides a kind of top and bottom combined blown converter, comprising: converter body; Converter bottom, comprises the bottom blowing brick be arranged in described converter bottom; N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged in described bottom blowing brick, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer.
Beneficial effect of the present invention is as follows:
In the embodiment of the present invention, technical scheme obtains N group bottom blowing gun, and each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, because each the group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, make the converter lining life initial stage, one group of bottom blowing gun that in described N group bottom blowing gun, length is longer plays bottom blowing effect, the remaining at least one group of shorter bottom blowing gun of length is also embedded in bottom blowing brick, do not start to play bottom blowing effect, along with furnace life increases, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, one group of bottom blowing gun that now length is longer is damaged gradually, lose bottom blowing effect, but the remaining at least one group of shorter bottom blowing gun of length exposes edge on bottom blowing brick, start to play bottom blowing effect, so along with furnace life increases, described N group bottom blowing gun plays bottom blowing effect successively, thus make before rear, to keep bottom blowing effect better at the converter lining life initial stage, and compared with prior art, do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, thus replacing bottom blowing gun difficulty when solving in prior art the technique existing and adopt quick change bottom blowing brick, the technical problem that converter output reduces, achieve Simplified flowsheet, improve converter output, and good bottom blowing effect can be realized.
Accompanying drawing explanation
Fig. 1 is the arrangement figure of bottom blowing gun for converter in the embodiment of the present invention;
Fig. 2 is the johning knot composition of bottom blowing gun A1 and refractory brick in the embodiment of the present invention;
Fig. 3 is the johning knot composition of bottom blowing gun B1 and refractory brick in the embodiment of the present invention;
Fig. 4 is the johning knot composition of bottom blowing gun C1 and refractory brick in the embodiment of the present invention.
Embodiment
Bottom blowing gun difficulty is changed for when there is the technique adopting quick change bottom blowing brick in prior art, the technical problem that converter output reduces, in the technical scheme that the embodiment of the present invention proposes, technical scheme obtains N group bottom blowing gun, and each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, because each the group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, make the converter lining life initial stage, one group of bottom blowing gun that in described N group bottom blowing gun, length is longer plays bottom blowing effect, the remaining at least one group of shorter bottom blowing gun of length is also embedded in bottom blowing brick, do not start to play bottom blowing effect, along with furnace life increases, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, one group of bottom blowing gun that now length is longer is damaged gradually, lose bottom blowing effect, but the remaining at least one group of shorter bottom blowing gun of length exposes edge on bottom blowing brick, start to play bottom blowing effect, so along with furnace life increases, described N group bottom blowing gun plays bottom blowing effect successively, thus make before rear, to keep bottom blowing effect better at the converter lining life initial stage, and compared with prior art, do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, achieve Simplified flowsheet, improve converter output, and good bottom blowing effect can be realized.
Below in conjunction with each accompanying drawing, the main of embodiment of the present invention technical scheme is realized principle, embodiment and set forth in detail the beneficial effect that should be able to reach.
One embodiment of the invention proposes the method for arranging of bottom blowing gun for converter, specifically can be applied in 180-250t top and bottom combined blown converter, and also can be applied in the top and bottom combined blown converter of more than 250t, the concrete treating processes of the method is as follows:
Obtain N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer.
Lower mask body is with N=3, the bottom blowing gun that each group bottom blowing gun includes 4 length identical is example, see Fig. 1, adopt 12 bottom blowing guns, 3 groups are divided into comprise A group bottom blowing gun, B group bottom blowing gun and C group bottom blowing gun, A, bottom blowing gun of often organizing in B with C group bottom blowing gun all comprises the identical bottom blowing gun of 4 length, wherein, A group bottom blowing gun comprises 4 bottom blowing guns and is respectively A1, A2, A3 and A4, B group bottom blowing gun comprises 4 bottom blowing guns and is respectively B1, B2, B3 and B4, and C group bottom blowing gun comprises 4 bottom blowing guns and is respectively C1, C2, C3 and C4, certainly, A, B, the quantity of the bottom blowing gun that each the group bottom blowing gun in C group bottom blowing gun comprises can be identical, different or part is identical, such as A group bottom blowing gun can comprise 3 bottom blowing guns, B group bottom blowing gun can comprise 4 bottom blowing guns and C group bottom blowing gun can comprise 6 bottom blowing guns, and A and B group bottom blowing gun includes 5 bottom blowing guns, and C group bottom blowing gun can comprise 8 bottom blowing guns, the application does not do concrete restriction.
In specific implementation process, A, B are different with the length of the every two groups of bottom blowing guns in C group bottom blowing gun, wherein, the length of each bottom blowing gun of A group bottom blowing gun can be any one numerical value in 900mm and 1200mm and 900mm ~ 1200mm, the length of each bottom blowing gun in B group bottom blowing gun can be any one numerical value in 500mm and 1000mm and 500mm ~ 1000mm, and the length of each bottom blowing gun in C group bottom blowing gun can be any one numerical value in 250mm and 800mm and 250mm ~ 800mm.
Specifically, in order to make to keep bottom blowing effect better at the converter lining life initial stage before rear, the length of the bottom blowing gun in A group bottom blowing gun can be made to be greater than the length of the bottom blowing gun in B group bottom blowing gun, and the length of bottom blowing gun in B group bottom blowing gun is greater than the length of the bottom blowing gun in C group bottom blowing gun, by arranging 3 groups of bottom blowing guns of different lengths, bottom blowing effect can be kept better before rear at the converter lining life initial stage, this is because converter current all adopts the design that bottom blowing gun is identical with furnace bottom lining thickness, in the production process of converter, along with the increase in furnace life, the resistance to material of furnace bottom corrodes aggravation, furnace bottom is thinning, A group bottom blowing gun is made first to start to play bottom blowing effect, after furnace bottom is thinning, B group bottom blowing gun then starts to play bottom blowing effect, and when furnace bottom becomes thinner, the bottom blowing of C group is robbed and is again started to play bottom blowing effect, and then can realize before rear, keeping bottom blowing effect better at the converter lining life initial stage.
Concrete, see Fig. 2, for the A1 in A group bottom blowing gun, the length of A1 is 1170mm, and the periphery of A1 is provided with refractory brick 20, the length of refractory brick 20 is all 1170mm mutually with the length of A1, for preventing the too fast damage of A1, improve the work-ing life of A1, make the bottom blowing effect of A1 keep good, further, the length of A2, A3 and A4 is 1170mm, and being provided with refractory brick in the periphery of A2, A3 and A4, concrete structure is see Fig. 2.
Concrete, see Fig. 3, for the B1 in B group bottom blowing gun, the length of B1 is 900mm, and be provided with refractory brick 21 in the periphery of A1 and top, the length of refractory brick 21 is all 1170mm mutually with the length of A1, for preventing the too fast damage of B1, improve the work-ing life of B1, and the aluminium flake 22 be provided with on the top of B1 for covering end muzzle, the thickness of aluminium flake is 1mm-4mm, specifically 2.5mm can be set to, 2.4mm equal length, further, B2, the length of B3 and B4 is 900mm, and at B2, the periphery of B3 and B4 is provided with refractory brick, and B2, the top of B3 and B4 is provided with the aluminium flake for covering end muzzle, concrete structure is see Fig. 3.
Wherein, along with furnace life increases, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, now A group bottom blowing gun is damaged gradually, lose bottom blowing effect, make B group bottom blowing gun expose edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, makes B group bottom blowing gun start to play bottom blowing effect.
Concrete, see Fig. 4, for the C1 in C group bottom blowing gun, the length of C1 is 600mm, and be provided with refractory brick 23 in the periphery of C1 and top, the length of refractory brick 23 is all 1170mm mutually with the length of A1, for preventing the too fast damage of C1, improve the work-ing life of C1, and the aluminium flake 24 be provided with on the top of C1 for covering end muzzle, the thickness of aluminium flake is 1mm-4mm, specifically 2.5mm can be set to, 2.4mm equal length, further, C2, the length of C3 and C4 is 600mm, and at C2, the periphery of C3 and C4 is provided with refractory brick, and C2, the top of C3 and C4 is provided with the aluminium flake for covering end muzzle, concrete structure is see Fig. 4.
Wherein, along with furnace life increases, the resistance to material of furnace bottom corrodes aggravation further and makes furnace bottom thinning, now B group bottom blowing gun is damaged gradually, lose bottom blowing effect, make C group bottom blowing gun expose edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, makes C group bottom blowing gun start to play bottom blowing effect.
Concrete, see Fig. 1, each bottom blowing gun in A, B and C group bottom blowing gun can be arranged on on described converter bottom mid-point two concentric(al) circless that are the center of circle, also can be arranged on a concentric(al) circles, ellipse, a rectangle etc. on described converter bottom can also be set certainly in shape, can certainly present irregular distribution, lower mask body can be arranged on each bottom blowing gun in A, B and C group bottom blowing gun on described converter bottom mid-point two concentric(al) circless that are the center of circle.
Wherein, the first concentric(al) circles in described two concentric(al) circless is concentric(al) circles 10 and the second concentric(al) circles is concentric(al) circles 11, the diameter of concentric(al) circles 10 can be the diameter of 1500-2000mm and concentric(al) circles 11 can be 1900-2800mm, wherein, the diameter of concentric(al) circles 10 is different with the diameter of concentric(al) circles 11, the diameter of such as 10 is 1900mm, the diameter of concentric(al) circles 11 can get the 2000mm different from 1900mm, 2400mm etc., lower mask body is with the diameter of concentric(al) circles 10 for 1600mm, and the diameter of concentric(al) circles 11 is 2300mm is example.
See Fig. 1, bottom blowing gun concentric(al) circles 10 is provided with in A group bottom blowing gun is such as A4, a bottom blowing gun in B group bottom blowing gun is such as two bottom blowing guns in B4 and C group bottom blowing gun is such as C3 and C4, and three bottom blowing guns concentric(al) circles 11 is provided with in A group bottom blowing gun are such as A1, A2 and A3, three bottom blowing guns in B group bottom blowing gun are such as B1, two bottom blowing guns in B2 and BC and C group bottom blowing gun are such as C1 and C2, in actual application, a bottom blowing gun in the A group bottom blowing gun that concentric(al) circles 10 is arranged can for arbitrary bottom blowing gun in A group bottom blowing gun, the application does not do concrete restriction, arbitrary bottom blowing gun can be arranged on concentric(al) circles 10 and concentric(al) circles 11 by B group and C group bottom blowing gun equally.
Further, see Fig. 1, in order to make bottom blowing gun can evenly carry out bottom blowing molten steel, can by A, all bottom blowing guns in B and C group bottom blowing gun are symmetrically distributed in the both sides of the line 13 of tap hole 12 and described converter bottom mid-point, wherein, on concentric(al) circles 11 from tap hole 12, bottom blowing gun order of placement is along clockwise direction: A1, A2, B1, B2, A3, C1, B3 and C2, and the angle of A1 and tap hole 12 is 30 °, the angle of A2 and tap hole 12 is 60 °, the angle of B1 and tap hole 12 is 120 °, the angle of B2 and tap hole 12 is 150 °, the angle of A3 and tap hole 12 is 210 °, the angle of C1 and tap hole 12 is 240 °, the angle of B3 and tap hole 12 is 300 °, and the angle of C2 and tap hole 12 is 330 °, make A1 and A3, A2 and C1, B1 and B3 and B2 and C2 is symmetrically distributed in the both sides of line 13.
Further, on concentric(al) circles 10 from tap hole 12, bottom blowing gun order of placement is equally along clockwise direction: C4, C3, A4 and B4, wherein, the angle of C4 and tap hole 12 is 45 °, the angle of C3 and tap hole 12 is 135 °, the angle of A4 and tap hole 12 is 225 °, and the angle of B4 and tap hole 12 is 315 °, make C4 and A4, C3 and B4 is symmetrically distributed in the both sides of line 13, make A, B, 2 bottom blowing guns in each group bottom blowing gun in C group bottom blowing gun are distributed in the left side of line 13, 2 remaining bottom blowing guns are distributed in the right side of line 13, make bottom blowing gun can evenly carry out bottom blowing molten steel, make bottom blowing better effects if, certainly it can also be 40 ° by the angle of C4 and tap hole 12, the angle of C3 and tap hole 12 is 130 °, the angle of A4 and tap hole 12 is 220 °, and the angle of B4 and tap hole 12 is 310 °, make C4 and A4, C3 and B4 also can be symmetrically distributed in the both sides of line 13.
Concrete, the technical scheme of the application is that 3 groups of bottom blowing guns are arranged converter bottom, wherein, A group bottom blowing gun is the longest, for 900-1200mm, B group bottom blowing gun secondly, C group bottom blowing gun is the shortest, make the converter lining life initial stage, A group bottom blowing gun plays bottom blowing effect, B and C group bottom blowing gun is also embedded in bottom blowing brick, muzzle is covered by aluminium flake, do not start to play bottom blowing effect, and along with furnace life increase, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, now A group bottom blowing gun is damaged gradually, lose bottom blowing effect, but B group bottom blowing gun exposes edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, B group bottom blowing gun starts to play bottom blowing effect, so along with furnace life increases, B group, C group bottom blowing gun plays bottom blowing effect successively to be terminated to final stove labour.
In actual application, adopt above-mentioned bottom blowing gun for converter method for arranging to test, within 3000 stoves in furnace life, A group bottom blowing gun can play good bottom blowing effect; Within the 3000-5000 stove in furnace life, B group bottom blowing gun can play good bottom blowing effect; When furnace life >=5000 heats after, C group bottom blowing gun can play good bottom blowing effect, and in the campaign reaching 7100 heats, the average carbon oxygen of converter terminal long-pending≤0.0024, can stability contorting converter terminal phosphorus content≤0.0090%, achieve the target that bottom blowing effect is synchronous with furnace life.
Compared with existing bottom blowing gun for converter method for arranging, the deterioration that effectively can improve later stage in furnace life bottom blowing effect of the bottom blowing gun for converter method for arranging of the application, meets the target that bottom blowing effect is synchronous with furnace life; And do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, can Simplified flowsheet, enhance productivity; And existing stove bottom blowing gun method for arranging is in latter stage in furnace life, substantially there is no bottom blowing effect, in this case, the chemical reaction deleterious of molten steel, the carbon oxygen of converter terminal is long-pending higher, carbon oxygen is long-pending even reaches more than 0.0035, and causing deoxygenated alloy consumption to increase, is the principal element affecting converter producing cost; Dephosphorization effect is deteriorated, converter terminal phosphorus content is difficult to control≤0.010%, and the bottom blowing gun for converter method for arranging of the application can terminate in initial stage in furnace life to final stove labour, A, B and C group bottom blowing gun can play bottom blowing effect successively, thus it is long-pending effectively can to reduce converter terminal carbon oxygen, reduce the oxygen consumption of converter tapping terminal, reduce production cost.
In another embodiment, 2 groups of bottom blowing guns can also be chosen, each group bottom blowing gun includes the identical bottom blowing gun of 2 length, 4 bottom blowing guns in 2 groups of bottom blowing guns can be distributed in described converter bottom, wherein, in 2 groups of bottom blowing chambeies, the length of first group of bottom blowing gun is 1100mm, the length of second group of bottom blowing gun is 850mm, make the converter lining life initial stage, described first group of bottom blowing gun plays bottom blowing effect, described second group of bottom blowing gun is also embedded in bottom blowing brick, muzzle is covered by aluminium flake, do not start to play bottom blowing effect, and along with furnace life increase, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, now described first group of bottom blowing gun is damaged gradually, lose bottom blowing effect, but described second group of bottom blowing gun exposes edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, described second group of bottom blowing gun is made to start to play bottom blowing effect, equally can at stove at the initial stage in furnace life to the later stage, still good bottom blowing effect can be kept, and compared with prior art, do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, achieve Simplified flowsheet, improve converter output, and good bottom blowing effect can be realized.
Certainly, can also 4 be chosen, 5, 6 bottom blowing guns such as group such as grade, and each group bottom blowing gun includes at least 2 bottom blowing guns, then by described 4, 5, in 6 bottom blowing guns such as group such as grade, all bottom blowing guns are all arranged in described converter bottom, because the length of the every two groups of bottom blowing guns in described N group bottom blowing gun is different, so, can at the initial stage in furnace life to the later stage, still good bottom blowing effect can be kept, and compared with prior art, do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, achieve Simplified flowsheet, improve converter output, and good bottom blowing effect can be realized.
The application another embodiment still provides a kind of top and bottom combined blown converter, comprising: converter body; Converter bottom, comprises the bottom blowing brick be arranged in described converter bottom; N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged in described bottom blowing brick, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer.
Wherein, described top and bottom combined blown converter can be such as 180-250t top and bottom combined blown converter, also can the top and bottom combined blown converter of more than 250t.
In specific implementation process, described N group bottom blowing gun such as 4, 5, 6 bottom blowing guns such as group such as grade, and each group bottom blowing gun includes at least 2 bottom blowing guns, then by described 4, 5, in 6 bottom blowing guns such as group such as grade, all bottom blowing guns are all arranged in described bottom blowing brick, because the length of the every two groups of bottom blowing guns in described N group bottom blowing gun is different, so, can at stove at the initial stage in furnace life to the later stage, still good bottom blowing effect can be kept, and compared with prior art, do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, achieve Simplified flowsheet, improve converter output, and good bottom blowing effect can be realized, lower mask body is with 3 groups of bottom blowing guns, and the bottom blowing gun that each group bottom blowing gun includes 4 length identical is example, specific as follows:
See Fig. 1, adopt 12 bottom blowing guns, 3 groups are divided into comprise A group bottom blowing gun, B group bottom blowing gun and C group bottom blowing gun, A, bottom blowing gun of often organizing in B with C group bottom blowing gun all comprises the identical bottom blowing gun of 4 length, wherein, A group bottom blowing gun comprises 4 bottom blowing guns and is respectively A1, A2, A3 and A4, B group bottom blowing gun comprises 4 bottom blowing guns and is respectively B1, B2, B3 and B4, and C group bottom blowing gun comprises 4 bottom blowing guns and is respectively C1, C2, C3 and C4, certainly, A, B, the quantity of the bottom blowing gun that each the group bottom blowing gun in C group bottom blowing gun comprises can be identical, different or part is identical, such as A group bottom blowing gun can comprise 3 bottom blowing guns, B group bottom blowing gun can comprise 4 bottom blowing guns and C group bottom blowing gun can comprise 6 bottom blowing guns, and A and B group bottom blowing gun includes 5 bottom blowing guns, and C group bottom blowing gun can comprise 8 bottom blowing guns, the application does not do concrete restriction.
Preferably, described N group bottom blowing gun is 3 groups of bottom blowing guns, and each the group bottom blowing gun in described 3 groups of bottom blowing guns comprises the identical bottom blowing gun of 4 length.
Further, described 3 groups of bottom blowing guns such as can comprise first group of bottom blowing gun, second group of bottom blowing gun and the 3rd group of bottom blowing gun, the length of each bottom blowing gun of described first group of bottom blowing gun is 900-1200mm, the length of each bottom blowing gun of described second group of bottom blowing gun is 500-1000mm, and the length of each bottom blowing gun of described 3rd group of bottom blowing gun is 250-800mm.
In specific implementation process, see Fig. 1, described first group of bottom blowing gun is A group bottom blowing gun, described second group of bottom blowing gun is B group bottom blowing gun, described 3rd group of bottom blowing gun is C group bottom blowing gun, A, the length of the every two groups of bottom blowing guns in B with C group bottom blowing gun is different, wherein, the length of each bottom blowing gun of A group bottom blowing gun can be any one numerical value in 900mm and 1200mm and 900mm ~ 1200mm, the length of each bottom blowing gun in B group bottom blowing gun can be any one numerical value in 500mm and 1000mm and 500mm ~ 1000mm, the length of each bottom blowing gun in C group bottom blowing gun can be any one numerical value in 250mm and 800mm and 250mm ~ 800mm.
Further, make before rear, to keep bottom blowing effect better at converter lining life initial stage, the length of the bottom blowing gun in described first group of bottom blowing gun can be made to be greater than the length of the bottom blowing gun in described second group of bottom blowing gun, the length of the bottom blowing gun in described second group of bottom blowing gun is greater than the length of the bottom blowing gun in described 3rd group of bottom blowing gun, by arranging 3 groups of bottom blowing guns of different lengths, bottom blowing effect can be kept better before rear at the converter lining life initial stage, this is because converter current all adopts the design that bottom blowing gun is identical with furnace bottom lining thickness, in the production process of converter, along with the increase in furnace life, the resistance to material of furnace bottom corrodes aggravation, furnace bottom is thinning, described first group of bottom blowing gun is made first to start to play bottom blowing effect, after furnace bottom is thinning, described second group of bottom blowing gun then starts to play bottom blowing effect, and when furnace bottom becomes thinner, described 3rd group of bottom blowing is robbed and is again started to play bottom blowing effect, and then can realize before rear, keeping bottom blowing effect better at the converter lining life initial stage.
Preferably, the top of each the bottom blowing chamber rifle in described second group of bottom blowing gun and described 3rd group of bottom blowing gun is provided with the aluminium flake for covering end muzzle.
Specifically, along with furnace life increases, the resistance to material of furnace bottom corrodes aggravation and makes furnace bottom thinning, now described first group of bottom blowing gun is damaged gradually, lose bottom blowing effect, make described second group of bottom blowing gun expose edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, makes described second group of bottom blowing gun start to play bottom blowing effect; Along with furnace life increases further, the resistance to material of furnace bottom corrodes aggravation further and makes furnace bottom thinning, now described second group of bottom blowing gun is damaged gradually, lose bottom blowing effect, described 3rd group of bottom blowing gun is made to expose edge on bottom blowing brick, under the effect of bottom blown gas pressure, the aluminium flake being placed on rifle top, the end leaves end muzzle and melts with molten steel, makes described 3rd group of bottom blowing gun start to play bottom blowing effect.
Preferably, each bottom blowing gun in described 3 groups of bottom blowing guns is arranged on on described converter bottom mid-point two concentric(al) circless that are the center of circle.
Wherein, the first concentrically ringed diameter in described two concentric(al) circless is 1500-2000mm and second concentrically ringed diameter is 1900-2800mm.
Further, described first concentric(al) circles is provided with a bottom blowing gun in described first group of bottom blowing gun, two bottom blowing guns in a bottom blowing gun in described second group of bottom blowing gun and described 3rd group of bottom blowing gun, and three bottom blowing guns described second concentric(al) circles is provided with in described first group of bottom blowing gun, two bottom blowing guns in three bottom blowing guns in described second group of bottom blowing gun and described 3rd group of bottom blowing gun.
Specifically, see Fig. 1, each bottom blowing gun in A, B and C group bottom blowing gun can be arranged on on described converter bottom mid-point two concentric(al) circless that are the center of circle, also can be arranged on a concentric(al) circles, ellipse, a rectangle etc. on described converter bottom can also be set certainly in shape, can certainly present irregular distribution, lower mask body can be arranged on each bottom blowing gun in A, B and C group bottom blowing gun on described converter bottom mid-point two concentric(al) circless that are the center of circle.
Wherein, the first concentric(al) circles in described two concentric(al) circless is concentric(al) circles 10 and the second concentric(al) circles is concentric(al) circles 11, the diameter of concentric(al) circles 10 can be the diameter of 1500-2000mm and concentric(al) circles 11 can be 1900-2800mm, wherein, the diameter of concentric(al) circles 10 is different with the diameter of concentric(al) circles 11, the diameter of such as 10 is 1900mm, the diameter of concentric(al) circles 11 can get the 2000mm different from 1900mm, 2400mm etc., lower mask body is with the diameter of concentric(al) circles 10 for 1600mm, and the diameter of concentric(al) circles 11 is 2300mm is example.
Preferably, all bottom blowing guns in described three groups of bottom blowing guns are symmetrically distributed in the both sides of tap hole and described converter bottom mid-point line.
Compared with existing top and bottom combined blown converter, the top and bottom combined blown converter of the application effectively can improve the deterioration of later stage in furnace life bottom blowing effect, meets the target that bottom blowing effect is synchronous with furnace life; And do not need to carry out the techniques such as bottom blowing gun replacing, do not affect normal production, can Simplified flowsheet, enhance productivity; And existing stove bottom blowing gun method for arranging is in latter stage in furnace life, substantially there is no bottom blowing effect, in this case, the chemical reaction deleterious of molten steel, the carbon oxygen of converter terminal is long-pending higher, carbon oxygen is long-pending even reaches more than 0.0035, and causing deoxygenated alloy consumption to increase, is the principal element affecting converter producing cost; Dephosphorization effect is deteriorated, converter terminal phosphorus content is difficult to control≤0.010%, and the bottom blowing gun for converter method for arranging of the application can terminate in initial stage in furnace life to final stove labour, A, B and C group bottom blowing gun can play bottom blowing effect successively, thus it is long-pending effectively can to reduce converter terminal carbon oxygen, reduce the oxygen consumption of converter tapping terminal, reduce production cost.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the method for arranging of a bottom blowing gun for converter, it is characterized in that, obtain N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged on converter bottom, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun difference, N be not less than 2 integer.
2. method for arranging as claimed in claim 1, is characterized in that, obtain 3 groups of bottom blowing guns, and each the group bottom blowing gun in described 3 groups of bottom blowing guns comprises the identical bottom blowing gun of 4 length.
3. method for arranging as claimed in claim 2, it is characterized in that, described 3 groups of bottom blowing guns comprise first group of bottom blowing gun, second group of bottom blowing gun and the 3rd group of bottom blowing gun, the length of each bottom blowing gun of described first group of bottom blowing gun is 900-1200mm, the length of each bottom blowing gun of described second group of bottom blowing gun is 500-1000mm, and the length of each bottom blowing gun of described 3rd group of bottom blowing gun is 250-800mm.
4. method for arranging as claimed in claim 3, it is characterized in that, the length of the bottom blowing gun in described first group of bottom blowing gun is greater than the length of the bottom blowing gun in described second group of bottom blowing gun, and the length of the bottom blowing gun in described second group of bottom blowing gun is greater than the length of the bottom blowing gun in described 3rd group of bottom blowing gun.
5. method for arranging as claimed in claim 4, is characterized in that, the top of each the bottom blowing chamber rifle in described second group of bottom blowing gun and described 3rd group of bottom blowing gun is provided with the aluminium flake for covering end muzzle.
6. the method for arranging as described in any one of claim 2 ~ 5, is characterized in that, each bottom blowing gun in described 3 groups of bottom blowing guns is arranged on on described converter bottom mid-point two concentric(al) circless that are the center of circle.
7. method for arranging as claimed in claim 6, it is characterized in that, the first concentrically ringed diameter in described two concentric(al) circless is 1500-2000mm and the second concentrically ringed diameter is 1900-2800mm.
8. method for arranging as claimed in claim 7, it is characterized in that, described first concentric(al) circles is provided with a bottom blowing gun in described first group of bottom blowing gun, two bottom blowing guns in a bottom blowing gun in described second group of bottom blowing gun and described 3rd group of bottom blowing gun, and three bottom blowing guns described second concentric(al) circles is provided with in described first group of bottom blowing gun, two bottom blowing guns in three bottom blowing guns in described second group of bottom blowing gun and described 3rd group of bottom blowing gun.
9. method for arranging as claimed in claim 8, it is characterized in that, all bottom blowing guns in described three groups of bottom blowing guns are symmetrically distributed in the both sides of tap hole and described converter bottom mid-point line.
10. a top and bottom combined blown converter, is characterized in that, comprising:
Converter body;
Converter bottom, comprises the bottom blowing brick be arranged in described converter bottom;
N group bottom blowing gun, each bottom blowing gun in described N group bottom blowing gun is arranged in described bottom blowing brick, wherein, each group bottom blowing gun in described N group bottom blowing gun at least comprises the identical bottom blowing gun of 2 length, and the length of every two groups of bottom blowing guns in described N group bottom blowing gun is different, N be not less than 2 integer.
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| CN104762437B (en) * | 2015-04-14 | 2016-07-06 | 四川西南不锈钢有限责任公司 | A kind of modified model GOR converter |
| CN106702072B (en) * | 2015-11-17 | 2018-08-31 | 鞍钢股份有限公司 | Converter combined blowing method with full-furnace-service bottom gun visible |
| CN105603146A (en) * | 2016-02-25 | 2016-05-25 | 钢铁研究总院 | Converter bottom blowing element air-supply method conducting grouping, timing and rotary switching according to intensity |
| CN106017070A (en) * | 2016-06-20 | 2016-10-12 | 宜兴曜源科技发展有限公司 | Top-bottom combined blowing furnace |
| WO2018150858A1 (en) * | 2017-02-15 | 2018-08-23 | 新日鐵住金株式会社 | Dephosphorization device and dephosphorization method for hot metal using same |
| CN107099640B (en) * | 2017-04-10 | 2019-04-23 | 首钢集团有限公司 | A kind of top and bottom combined blown converter and bottom blowing method |
| CN109371195B (en) * | 2018-10-29 | 2020-11-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Manufacturing and assembling method of converter bottom powder spray gun synchronous with furnace service |
| CN110343800B (en) * | 2019-07-03 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | Converter bottom blowing process for bottom blowing brick grouping blowing control |
| CN110396567B (en) * | 2019-08-23 | 2023-04-14 | 鞍山市和丰耐火材料有限公司 | Layout structure of furnace bottom gas supply bricks for reducing carbon-oxygen deposit at converter end point and bottom blowing process |
| CN111321268A (en) * | 2020-03-16 | 2020-06-23 | 中天钢铁集团有限公司 | Method for finding circle center at converter building bottom |
| CN114045375B (en) * | 2021-10-15 | 2023-03-17 | 首钢集团有限公司 | Arrangement method of bottom blowing tuyere and bottom blowing converter |
| CN115637307B (en) * | 2022-09-30 | 2024-04-09 | 首钢集团有限公司 | Converter and control method of converter bottom blowing |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |