CN105219916B - High-precision control is molded composite tapping hole pipe brick and its manufacture method - Google Patents
High-precision control is molded composite tapping hole pipe brick and its manufacture method Download PDFInfo
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- CN105219916B CN105219916B CN201510683162.4A CN201510683162A CN105219916B CN 105219916 B CN105219916 B CN 105219916B CN 201510683162 A CN201510683162 A CN 201510683162A CN 105219916 B CN105219916 B CN 105219916B
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- tapping hole
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- hole pipe
- mixed
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- 239000011449 brick Substances 0.000 title claims abstract description 52
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 50
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 42
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 42
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 42
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 42
- 239000002994 raw material Substances 0.000 claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000010439 graphite Substances 0.000 claims abstract description 27
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000007493 shaping process Methods 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000007767 bonding agent Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical group [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 38
- 238000002156 mixing Methods 0.000 claims description 30
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 25
- 239000005011 phenolic resin Substances 0.000 claims description 25
- 229920001568 phenolic resin Polymers 0.000 claims description 25
- 239000000395 magnesium oxide Substances 0.000 claims description 19
- 235000012245 magnesium oxide Nutrition 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 239000004615 ingredient Substances 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910052580 B4C Inorganic materials 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 235000013339 cereals Nutrition 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 21
- 239000010959 steel Substances 0.000 abstract description 21
- 239000011819 refractory material Substances 0.000 abstract description 5
- 235000019580 granularity Nutrition 0.000 description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000462 isostatic pressing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of high-precision control shaping composite tapping hole pipe brick and its manufacture method, composite tapping hole pipe brick include inwall, outer wall and its between thin cylinder, its primary raw material includes highly-purity magnesite, fused magnesite, graphite, antioxidant and bonding agent, and manufacturing process comprises the following steps：In dispensing, mixed grind, green compact shaping, heat treatment and assembling, mixed grind step, inwall raw material and outer wall raw material separate mixed grind.The high-precision control shaping composite tapping hole pipe brick of the present invention can need design length according to steel mill, also small with post-production trim amount, save raw material, aesthetic in appearance, assembling, convenient transportation, the advantage such as globality is strong；The composite tapping hole pipe brick of the present invention is made up of diametric(al) using two kinds of material refractory materials, and according to the ratio of steel mill's two kinds of materials of actual adjustment, it can reach that whole pipe brick is stablized relatively using process producing steel velocity, the metastable advantage of steel quality under the premise of pipe brick bulk life time is ensured.
Description
Technical field
The invention belongs to metallurgical technical field of refractory materials, and in particular to a kind of high-precision control is molded composite tapping hole pipe
Brick and its manufacture method.
Background technology
Tapping hole is the unique passage that molten steel is entered ladle by converter.During tapping, the friction of high-temperature molten steel, clinker is born
Wash away and oxidative attack, in addition the effect of rapid heat cycle, cause the tapping hole life-span very low, it is necessary to constantly repair and change, no
Only influence production cycle, and influence steel quality and production stability.Tapping hole internal diameter size, directly influences producing steel velocity
Speed and tap the time length.Tapping hole is relatively small using internal diameter at initial stage, and speed of tapping a blast furnace is slower, and tapping duration is longer,
Influence rhythm of production.With the increase of tapping number of times, tapping hole internal diameter, which is washed away due to slag iron, corroded, etc. acts on and becoming larger, meeting
Cause the shortcomings of big steel flow velocity degree change, big turbulent flow, easy slag.Therefore, keep tapping hole internal diameter to stablize relatively, there is great meaning
Justice.
Current steel mill typically uses magnesium carbonaceous steel-tapping hole tube brick, uniform with pressure using equal pressing equipment global formation,
The advantage of good integrity.But isostatic pressing steel-tapping hole tube brick, often has the following disadvantages：First, because former is limited, no
The steel-tapping hole tube brick product beyond certain length can be molded；2nd, because hydrostatic pressure direction is from outside to inside, so as to cause
Steel mouthful pipe brick inside and outside wall performance is uneven；3rd, isostatic pressing steel-tapping hole tube brick precision is not high, and post-production trim amount is larger,
Cause raw material and waste of time；4th, because volume is larger, inconvenience is brought to transport and construction.
The content of the invention
Composite tapping hole pipe is molded it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of high-precision control
Brick and its manufacture method, using electric screw high-precision control be molded, length direction using multi-section type assemble or multi-section type with
The assembled mode of integral tube brick, diametric(al) reaches that length is unrestricted by changing inside and outside wall refractory material species, and tapping
Speed and the metastable purpose of steel quality.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of high-precision control is molded composite tapping hole pipe brick, is radially made up of inner and outer wall, between inner and outer wall
It is provided with thin wall metal cylinder；
The inwall is prepared from by following percentage by weight raw material：
Major ingredient：Highly-purity magnesite 80-90wt%
Auxiliary material：Graphite 6-15.5wt%
Bonding agent：Phenolic resin 3.5-4.5wt%；
The outer wall is prepared from by following percentage by weight raw material：
Major ingredient：Fused magnesite 75-85wt%
Auxiliary material：Graphite 4-16wt%
Antioxidant：One or more of mixture 5-11wt% in aluminium powder, silica flour, boron carbide
Bonding agent：Phenolic resin 3.5-4.5wt%.
In the above-mentioned technical solutions, the highly-purity magnesite purity is MgO >=97wt%, and by granularity D≤0.088mm,
0.088mm ＜ D ＜ 1mm, 1mm≤D≤3mm are mixed.
In the above-mentioned technical solutions, the fused magnesite is big crystallization magnesia, and purity is MgO >=98.2wt%, SiO2≤
0.6wt%, igloss≤0.25wt%, and by granularity D≤0.088mm, 0.088mm ＜ D ＜ 1mm, 1mm≤D≤3mm mixing and
Into.
In the above-mentioned technical solutions, the graphite is crystalline flake graphite, and its purity is C >=98wt%, and granularity is -100 mesh.
In the above-mentioned technical solutions, the particle mean size of the antioxidant is 10-100 μm.
In the above-mentioned technical solutions, the phenolic resin solid content >=72wt%, remaining carbon >=42wt%, moisture≤
5wt%.
Above-mentioned high-precision control is molded the manufacture method of composite tapping hole pipe brick, comprises the following steps：Dispensing, mixed grind, life
Base shaping, heat treatment and assemble, in the mixed grind step, inwall raw material and outer wall raw material separate mixed grind, inwall raw material mixed grind according to
It is secondary to be：The highly-purity magnesite that granularity is 0.088mm ＜ D ＜ 1mm and 1mm≤D≤3mm, dry-mixed 1-2 minutes → addition are added during low speed
Phenolic resin, wet mixing 2-3 minutes → addition graphite, 2-3 minutes → addition of wet mixing granularity for≤0.088mm highly-purity magnesite, it is wet
Mix the 10-15 minutes → discharging of 2-3 minutes → mixed at high speed；Outer wall raw material mixed grind is followed successively by：It is 0.088mm that granularity is added during low speed
＜ D ＜ 1mm and 1mm≤D≤3mm fused magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3 minutes → addition stone
Ink, 2-3 minutes → addition of wet mixing granularity is≤0.088mm highly-purity magnesite and antioxidant, 2-3 minutes → mixed at high speed of wet mixing
10-15 minutes → discharging；All pug requirements are well mixed, must not there is the raw material of granularity≤0.088mm in the dust that swims, pug
Control pug temperature during 28-40wt%, mixed grind must not exceed 70 DEG C.
In the above-mentioned technical solutions, in the green compact forming step, pug is packed into mould, former is electronic
Spiral brick press, briquetting pressure >=6300KN.
In the above-mentioned technical solutions, in the heat treatment step, semi-finished product adobe should be spontaneously dried 8 hours, then enter kiln
Dry, 210 DEG C are incubated 10-20 hours.
Beneficial effects of the present invention：
(1) high-precision control of the invention shaping composite tapping hole pipe brick is combined or multi-section type pipe using multi-section type pipe brick
Brick and isopipe brick combination, can need design length, and be precisely controlled to using electric screw press according to steel mill
The multi-section type pipe brick of type, it is also small with post-production trim amount, raw material is saved, aesthetic in appearance, assembling, convenient transportation, globality
The advantage such as strong.
(2) electric screw press that high-precision control of the invention shaping composite tapping hole pipe brick manufacturing process is used
It is a kind of extremely strong forging equipment of technique applicability, accurate with energy hole, the number of strokes is high, simple in construction, compact, transmission
Chain is short, operates easy to maintenance, saving labour and maintenance cost, and operation safety can adjust hitting power according to forging forming technique
And blow energy, forging forming precision is high, and mold stresses are small, many advantages, such as die life is long.With friction press phase
Than, also with without the intermediate gearings such as frictional disk, transverse axis and friction belt consumable accessory, parts are few, and reliability is high, and precision is good etc.
Feature.Compared with isostatic pressing machine, have the advantages that shaping speed is fast, efficiency high.Therefore, high-precision control electric screw can be used
Forcing press is molded multi-section type composite tapping hole pipe brick, has the advantages that precision is high, pressure is uniform, easy to assembly, good integrity, energy
Meet steel mill's tapping hole use requirement.
(3) high-precision control of the invention shaping composite tapping hole pipe brick diametric(al) is using two kinds of material refractory material groups
Into being mainly reflected in the following aspects：1) magnesia in outer wall section also has higher content of MgO so that periclase is directly tied
Conjunction degree strengthens, and the corrosion resistance of pipe brick is strong；2) the periclase crystal grain of outer wall section magnesia is bigger than inner-diameter portion, weightless under high temperature
Smaller, corrosion resistance is strong；3) outer wall section contains composite antioxidant, and inoxidizability is stronger than inner-diameter portion.Due to three above
The presence of factor, the high-precision control is molded composite tapping hole pipe brick outer wall section has more outstanding anti-slag compared with inner wall section
Iron washes away, corroded and antioxygenic property.The composite tapping hole uses initial stage, and internal diameter is smaller, but steel contacts material relatively
Difference, corrodes very fast, can guarantee that this period will not be slow due to reaming speed, causes molten steel flow speed slow, the tapping time is long, influence life
Produce rhythm.With the progress of erosion process, pipe brick internal diameter becomes big, when steel contacts to outer wall area, due to resistance in outer wall area
Inoxidizability, the corrosion resistance of fiery material are stronger, and erosion process is slack-off, can effectively prevent the quick change due to aperture from causing steel greatly
Water flow velocity is fast, and the tapping time is short, and turbulent flow is big, the shortcomings of slag is more.Therefore, by diametric(al) using two kinds of material refractory materials
Composition, and according to the ratio of steel mill's two kinds of materials of actual adjustment, whole pipe brick can be reached under the premise of pipe brick bulk life time is ensured
Stablized relatively using process producing steel velocity, the metastable advantage of steel quality.
Brief description of the drawings
Fig. 1 is that high-precision control is molded steel-tapping hole tube brick single-unit figure.
Fig. 2 is that high-precision control is molded steel-tapping hole tube brick assembling figure.
In figure：Inwall 1, thin cylinder 2, outer wall 3.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1：
A kind of high-precision control is molded composite tapping hole pipe brick, is radially made up of inwall 1 and outer wall 3, inner and outer wall
Between be provided with thin wall metal cylinder 2；
The raw material weight percentage of inwall 1 is as follows：
Major ingredient：Highly-purity magnesite 81wt%
Auxiliary material：Graphite 15.3wt%
Bonding agent：Phenolic resin 3.7wt%；
The raw material weight percentage of outer wall 3 is as follows：
Major ingredient：Fused magnesite 75wt%
Auxiliary material：Graphite 12.3wt%
Antioxidant：Metallic aluminium powder 9wt%
Bonding agent：Phenolic resin 3.7wt%.
The purity of described highly-purity magnesite is MgO >=97wt%, by D≤0.088mm, 0.088mm ＜ D ＜ 1mm and 1mm≤
Tri- kinds of granularities of D≤3mm are mixed, and ratio is 20wt%, 30wt%, 50wt% respectively；The fused magnesite is big Crystalline Magnesium
Sand, purity is MgO >=98.2wt%, SiO2≤0.6wt%, igloss≤0.25wt%, and by≤0.088mm, 0.088-1mm,
Tri- kinds of granularities of 1-3mm are mixed, and ratio is respectively 20wt%, 30wt%, 50wt%；The graphite is crystalline flake graphite, purity
For C >=98%, granularity is -100 mesh；The metallic aluminium powder granularity is -100 μm；Solid content >=72wt% of the phenolic resin,
Remaining carbon >=42wt%, moisture≤5wt%.
The manufacture method of the high-precision control shaping composite tapping hole pipe brick comprises the following steps：Dispensing, mixed grind, green compact
Shaping, heat treatment and assembling.In the mixed grind step, the raw material of inwall 1 and the raw material of outer wall 3 separate mixed grind, the raw material mixed grind of inwall 1 according to
It is secondary to be：The highly-purity magnesite that granularity is 0.088mm ＜ D ＜ 1mm and 1mm≤D≤3mm, dry-mixed 1-2 minutes → addition are added during low speed
Phenolic resin, wet mixing 2-3 minutes → addition graphite, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite, wet mixing
10-15 minutes → the discharging of 2-3 minutes → mixed at high speed；The raw material mixed grind of outer wall 3 is followed successively by：It is 0.088mm that granularity is added during low speed
＜ D ＜ 1mm and 1mm≤D≤3mm fused magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3 minutes → addition stone
Ink, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite and antioxidant, 2-3 minutes → mixed at high speed of wet mixing
10-15 minutes → discharging；All pug requirements are well mixed, must not there is the original of granularity D≤0.088mm in the dust that swims, pug
Material control pug temperature during 28-40wt%, mixed grind must not exceed 70 DEG C.In the green compact forming step, precise
The weight of pug, is packed into mould, and material is uniformly taken off during weighing, pug segregation is prevented, during cloth, inside and outside wall raw material it
Between separated using metal foil cylinder 2, uniform distribution, compacting respectively, former is electric screw brick press, briquetting pressure >=
6300KN, molding parameter is as shown in table 1 below.
Design parameter table when green compact are molded in the embodiment 1 of table 1
| Gear | Rotating speed | Highly, mm | Cycle | Whether aggravate | Whether it is vented |
| One grade | 1 (0 turn 0/ | 60 | 1 | Do not allow to aggravate | It is |
| Two grades | 1 point 6) 0 | 200 | 1 | Do not allow to aggravate | It is |
| Third gear | 250 | 100 | 5 | Allow to aggravate | It is no |
| Fourth gear | 300 | 100 | 6 | Allow to aggravate | It is no |
| Five grades | 350 | 100 | 3 | Allow to aggravate | It is no |
In the heat treatment step, semi-finished product adobe should be spontaneously dried 8 hours, and it is dry then to enter kiln drying, and 210 DEG C of insulations 12 are small
When.In the number of assembling steps, as needed by assembling after the processing of drawing precision optical machinery.
Embodiment 2：
A kind of high-precision control is molded composite tapping hole pipe brick, is radially made up of inwall 1 and outer wall 3, inner and outer wall
Between be provided with thin wall metal cylinder 2；
The raw material weight percentage of inwall 1 is as follows：
Major ingredient：Highly-purity magnesite 88wt%
Auxiliary material：Graphite 8.3wt%
Bonding agent：Phenolic resin 3.7wt%；
The raw material weight percentage of outer wall 3 is as follows：
Major ingredient：Fused magnesite 78wt%
Auxiliary material：Graphite 11wt%
Antioxidant：Metallic aluminium powder 7.3wt%
Bonding agent：Phenolic resin 3.7wt%.
The purity of described highly-purity magnesite is MgO >=97wt%, by≤0.088mm, 0.088-1mm, tri- kinds of granularities of 1-3mm
Mix, ratio is 20wt%, 30wt%, 50wt% respectively；The fused magnesite is big crystallization magnesia, purity be MgO >=
98.2wt%, SiO2≤0.6wt%, igloss≤0.25wt%, and by≤0.088mm, 0.088-1mm, tri- kinds of granularities of 1-3mm are mixed
Conjunction is formed, and ratio is respectively 20wt%, 30wt%, 50wt%；The graphite is crystalline flake graphite, and purity is C >=98%, granularity
For -100 mesh；The metallic aluminium powder granularity is -100 μm；Solid content >=72wt% of the phenolic resin, remaining carbon >=
42wt%, moisture≤5wt%.
The manufacture method of the high-precision control shaping composite tapping hole pipe brick comprises the following steps：Dispensing, mixed grind, green compact
Shaping, heat treatment and assembling.In the mixed grind step, the raw material of inwall 1 and the raw material of outer wall 3 separate mixed grind, the raw material mixed grind of inwall 1 according to
It is secondary to be：The highly-purity magnesite that granularity is 0.088mm ＜ D ＜ 1mm and 1mm≤D≤3mm, dry-mixed 1-2 minutes → addition are added during low speed
Phenolic resin, wet mixing 2-3 minutes → addition graphite, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite, wet mixing
10-15 minutes → the discharging of 2-3 minutes → mixed at high speed；The raw material mixed grind of outer wall 3 is followed successively by：It is 0.088mm that granularity is added during low speed
＜ D ＜ 1mm and 1mm≤D≤3mm fused magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3 minutes → addition stone
Ink, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite and antioxidant, 2-3 minutes → mixed at high speed of wet mixing
10-15 minutes → discharging；All pug requirements are well mixed, must not there is the original of granularity D≤0.088mm in the dust that swims, pug
Material control pug temperature during 28-40wt%, mixed grind must not exceed 70 DEG C.In the green compact forming step, precise
The weight of pug, is packed into mould, and material is uniformly taken off during weighing, pug segregation is prevented, during cloth, inside and outside wall raw material it
Between separated using metal foil cylinder 2, uniform distribution, compacting respectively, former is electric screw brick press, briquetting pressure >=
6300KN, molding parameter is as shown in table 2 below.
Design parameter table when green compact are molded in the embodiment 2 of table 2
| Gear | Rotating speed | Highly, mm | Cycle | Whether aggravate | Whether it is vented |
| One grade | 1 (0 turn 0/ | 60 | 2 | Do not allow to aggravate | It is |
| Two grades | 1 point 6) 0 | 200 | 2 | Do not allow to aggravate | It is |
| Third gear | 250 | 100 | 5 | Allow to aggravate | It is no |
| Fourth gear | 300 | 100 | 5 | Allow to aggravate | It is no |
| Five grades | 350 | 100 | 3 | Allow to aggravate | It is no |
In the heat treatment step, semi-finished product adobe should be spontaneously dried 8 hours, and it is dry then to enter kiln drying, and 210 DEG C of insulations 10 are small
When.In the number of assembling steps, as needed by assembling after the processing of drawing precision optical machinery.
Embodiment 3：
A kind of high-precision control is molded composite tapping hole pipe brick, is radially made up of inwall 1 and outer wall 3, inner and outer wall
Between be provided with thin wall metal cylinder 2；
The raw material weight percentage of inwall 1 is as follows：
Major ingredient：Highly-purity magnesite 90wt%
Auxiliary material：Graphite 6.3wt%
Bonding agent：Phenolic resin 3.7wt%；
The raw material weight percentage of outer wall 3 is as follows：
Major ingredient：Fused magnesite 85wt%
Auxiliary material：Graphite 6wt%
Antioxidant：Metallic aluminium powder 5.3wt%
Bonding agent：Phenolic resin 3.7wt%.
The purity of described highly-purity magnesite is MgO >=97wt%, by≤0.088mm, 0.088-1mm, tri- kinds of granularities of 1-3mm
Mix, ratio is 20wt%, 30wt%, 50wt% respectively；The fused magnesite is big crystallization magnesia, purity be MgO >=
98.2wt%, SiO2≤0.6wt%, igloss≤0.25wt%, and by≤0.088mm, 0.088-1mm, tri- kinds of granularities of 1-3mm are mixed
Conjunction is formed, and ratio is respectively 20wt%, 30wt%, 50wt%；The graphite is crystalline flake graphite, and purity is C >=98%, granularity
For -100 mesh；The metallic aluminium powder granularity is -100 μm；Solid content >=72wt% of the phenolic resin, remaining carbon >=
42wt%, moisture≤5wt%.
The manufacture method of the high-precision control shaping composite tapping hole pipe brick comprises the following steps：Dispensing, mixed grind, green compact
Shaping, heat treatment and assembling.In the mixed grind step, the raw material of inwall 1 and the raw material of outer wall 3 separate mixed grind, the raw material mixed grind of inwall 1 according to
It is secondary to be：The highly-purity magnesite that granularity is 0.088mm ＜ D ＜ 1mm and 1mm≤D≤3mm, dry-mixed 1-2 minutes → addition are added during low speed
Phenolic resin, wet mixing 2-3 minutes → addition graphite, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite, wet mixing
10-15 minutes → the discharging of 2-3 minutes → mixed at high speed；The raw material mixed grind of outer wall 3 is followed successively by：It is 0.088mm that granularity is added during low speed
＜ D ＜ 1mm and 1mm≤D≤3mm fused magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3 minutes → addition stone
Ink, wet mixing 2-3 minutes → addition granularity D≤0.088mm highly-purity magnesite and antioxidant, 2-3 minutes → mixed at high speed of wet mixing
10-15 minutes → discharging；All pug requirements are well mixed, must not there is the original of granularity D≤0.088mm in the dust that swims, pug
Material control pug temperature during 28-40wt%, mixed grind must not exceed 70 DEG C.In the green compact forming step, precise
The weight of pug, is packed into mould, and material is uniformly taken off during weighing, pug segregation is prevented, during cloth, inside and outside wall raw material it
Between separated using metal foil cylinder 2, uniform distribution, compacting respectively, former is electric screw brick press, briquetting pressure >=
6300KN, molding parameter is as shown in table 3 below.
Design parameter table when green compact are molded in the embodiment 3 of table 3
| Gear | Rotating speed | Highly, mm | Cycle | Whether aggravate | Whether it is vented |
| One grade | 1 (0 turn 0/ | 60 | 2 | Do not allow to aggravate | It is |
| Two grades | 1 point 6) 0 | 200 | 2 | Do not allow to aggravate | It is |
| Third gear | 250 | 100 | 6 | Allow to aggravate | It is no |
| Fourth gear | 300 | 100 | 8 | Allow to aggravate | It is no |
| Five grades | 350 | 100 | 4 | Allow to aggravate | It is no |
In the heat treatment step, semi-finished product adobe should be spontaneously dried 8 hours, and it is dry then to enter kiln drying, and 210 DEG C of insulations 18 are small
When.In the number of assembling steps, as needed by assembling after the processing of drawing precision optical machinery.
Claims (7)
1. a kind of high-precision control is molded composite tapping hole pipe brick, it is characterised in that：The composite tapping hole pipe brick radially by
Inwall (1) and outer wall (3) are constituted, and thin wall metal cylinder (2) is provided between the inwall (1) and outer wall (3)；
The inwall (1) is prepared from by following percentage by weight raw material：
Major ingredient：Highly-purity magnesite 80-90wt%
Auxiliary material：Graphite 6-15.5wt%
Bonding agent：Phenolic resin 3.5-4.5wt%；
The outer wall (3) is prepared from by following percentage by weight raw material：
Major ingredient：Fused magnesite 75-85wt%
Auxiliary material：Graphite 4-16wt%
Antioxidant：One or more of mixture 5-11wt% in aluminium powder, silica flour, boron carbide
Bonding agent：Phenolic resin 3.5-4.5wt%；
Wherein, the highly-purity magnesite purity is MgO >=97wt%, and by granularity D≤0.088mm, 0.088mm ＜ D ＜ 1mm, 1mm
≤ D≤3mm is mixed；
The fused magnesite is big crystallization magnesia, and purity is MgO >=98.2wt%, SiO2≤ 0.6wt%, igloss≤0.25wt%,
And mixed by granularity D≤0.088mm, 0.088mm ＜ D ＜ 1mm, 1mm≤D≤3mm.
2. high-precision control according to claim 1 is molded composite tapping hole pipe brick, it is characterised in that：The graphite is squama
Piece graphite, its purity is C >=98wt%, and granularity is -100 mesh.
3. high-precision control according to claim 1 is molded composite tapping hole pipe brick, it is characterised in that：The antioxidant
Particle mean size be 10-100 μm.
4. high-precision control according to claim 1 is molded composite tapping hole pipe brick, it is characterised in that：The phenolic resin
Solid content >=72wt%, remaining carbon >=42wt%, moisture≤5wt%.
5. the high-precision control described in a kind of claim 1 is molded the manufacture method of composite tapping hole pipe brick, comprise the following steps：
Dispensing, mixed grind, green compact shaping, heat treatment and assembling, it is characterised in that：
In the mixed grind step, inwall raw material and outer wall raw material separate mixed grind, and inwall raw material mixed grind is followed successively by：Grain is added during low speed
Spend for 0.088mm ＜ D ＜ 1mm and 1mm≤D≤3mm highly-purity magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3
Minute → addition graphite, 2-3 minutes → addition of wet mixing granularity is≤0.088mm highly-purity magnesite, wet mixing 2-3 minute → mix at a high speed
Close 10-15 minutes → discharging；Outer wall raw material mixed grind is followed successively by：It is 0.088mm ＜ D ＜ 1mm and 1mm≤D that granularity is added during low speed
≤ 3mm fused magnesite, dry-mixed 1-2 minutes → addition phenolic resin, wet mixing 2-3 minutes → addition graphite, wet mixing 2-3 minutes →
Add highly-purity magnesite and antioxidant of the granularity for≤0.088mm, wet mixing 10-15 minutes → discharging of 2-3 minutes → mixed at high speed；
All pug requirements are well mixed, and the raw material that must not have granularity≤0.088mm in the dust that swims, pug is controlled in 28-40wt%,
Pug temperature must not exceed 70 DEG C during mixed grind.
6. high-precision control according to claim 5 is molded the manufacture method of composite tapping hole pipe brick, it is characterised in that：Institute
State in green compact forming step, pug is packed into mould, former is electric screw brick press, briquetting pressure >=
6300KN。
7. high-precision control according to claim 5 is molded the manufacture method of composite tapping hole pipe brick, it is characterised in that：Institute
State in heat treatment step, semi-finished product adobe should be spontaneously dried 8 hours, it is dry then to enter kiln drying, 210 DEG C are incubated 10-20 hours.
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| CN106242601A (en) * | 2016-08-09 | 2016-12-21 | 宿州市威菱耐火材料有限责任公司 | A kind of resistant to elevated temperatures tapping hole brick cup and preparation method |
| CN109591158A (en) * | 2019-01-16 | 2019-04-09 | 山东钢铁股份有限公司 | Tundish current stabilizer and its manufacturing method |
| JP7256063B2 (en) * | 2019-04-17 | 2023-04-11 | 黒崎播磨株式会社 | Manufacturing method of tap sleeve |
| CN110003922A (en) * | 2019-04-30 | 2019-07-12 | 山东泰山钢铁集团有限公司 | A kind of method for repairing and mending of peephole brick cup down tube brick |
| CN110918970B (en) * | 2019-11-15 | 2021-06-25 | 中天钢铁集团有限公司 | Submerged nozzle lining material for reducing wire breakage rate in silicon-deoxidized steel processing process |
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| CN1218053C (en) * | 2003-07-23 | 2005-09-07 | 谢启荣 | Technology for making combined tapping hole |
| CN101591185A (en) * | 2009-03-19 | 2009-12-02 | 宜兴新威利成耐火材料有限公司 | Integral type steel tapping hole replacement brick and preparation method thereof |
| CN102249718B (en) * | 2011-06-10 | 2013-06-19 | 鞍山浦项特种耐火材料有限公司 | Aluminum magnesium carbon sliding plate brick for stopping slag at steel tapping hole of converter |
| CN103641498A (en) * | 2013-11-18 | 2014-03-19 | 安徽省萧县华龙耐火材料有限责任公司 | Integrated converter tapping hole ramming brick cup and production method thereof |
| CN104649694A (en) * | 2015-03-13 | 2015-05-27 | 河南省西保冶材集团有限公司 | Tapping hole brick for split assembled converter and production process of tapping hole brick |
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