CN103586960A - Repairing technology for in-situ pouring of tapholes of double-taphole blast furnace - Google Patents

Repairing technology for in-situ pouring of tapholes of double-taphole blast furnace Download PDF

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Publication number
CN103586960A
CN103586960A CN201310548777.7A CN201310548777A CN103586960A CN 103586960 A CN103586960 A CN 103586960A CN 201310548777 A CN201310548777 A CN 201310548777A CN 103586960 A CN103586960 A CN 103586960A
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CN
China
Prior art keywords
parts
blast furnace
castable
tapholes
schmigel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310548777.7A
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Chinese (zh)
Inventor
佘云锋
佘成其
吴建华
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CHANGXING FURNACE MATERIAL Co Ltd
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CHANGXING FURNACE MATERIAL Co Ltd
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Publication date
Application filed by CHANGXING FURNACE MATERIAL Co Ltd filed Critical CHANGXING FURNACE MATERIAL Co Ltd
Priority to CN201310548777.7A priority Critical patent/CN103586960A/en
Publication of CN103586960A publication Critical patent/CN103586960A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/08Producing shaped prefabricated articles from the material by vibrating or jolting
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay

Abstract

The invention discloses a repairing technology for in-situ pouring of tapholes of a double-taphole blast furnace. Firstly, corundum aggregate covered with bitumen, corundum powder, metallic aluminum powder and explosion-proof fibers are mixed to obtain pouring materials, then oxide and melts on the side walls of the tapholes are removed through drilling steel, the central scale height of each taphole is measured out so that the center lines of the two tapholes can be located on the same horizontal plane, pouring moulds are arranged in the tapholes in an erected mode, and finally the repairing technology is completed after pouring and baking. The repairing technology has the advantages that in-situ integrated pouring is performed on the tapholes instead of traditional ramming material repairing, the heat resistance and the anti-scouring property of the tapholes are improved, the service life of the tapholes can be effectively prolonged, maintenance cost is reduced, the tapholes can be continuously used for more than two years after being repaired, and therefore the production efficiency of the blast furnace can be effectively enhanced.

Description

The renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site
[technical field]
The present invention relates to technical field of blast furnace ironmaking, be specifically related to the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site.
[background technology]
Blast furnace ironmaking is to utilize reducing agent at high temperature iron ore or iron-bearing material to be reduced into the process of liquid pig iron, in whole production smelting process, blast-furnace body is nucleus equipment, and the efficiency of blast furnace body and the length in life-span will directly affect running efficiency and the production efficiency of whole ironmaking workshop system equipment, existing blast furnace taphole generally adopts brown corundum brick to build by laying bricks or stones, while needing to repair in use, adopt ramming mass ramming to repair, such tapping hole is exposed in air after tapping a blast furnace, be subject to rapid heat cycle and air oxidation serious, only have 1~15 day general service time, major part is all at 3~5 days, this be because the tapping hole refractory material of ramming generally just ditch basal surface one deck is relatively closely knit, and following position, top layer is all very loose, resistance to erosion not, and because ramming mass tapping hole is too short service life, cause tapping hole to repair frequent, increase maintenance and repair cost, reduce the production efficiency in whole workshop.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, the renovation technique that proposes a kind of pair of iron mouth blast furnace iron notch cast-in-site, the method can be strengthened the anti-strip of iron runner castable, increases the service life, guarantee that blast furnace is stable, safety in production, enhance productivity.
For achieving the above object, the present invention proposes the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site, comprise the steps:
A) by forced mixer, be dry mixed 4~7 minutes after the corundum aggregate being covered by pitch, schmigel, metallic aluminium powder and explosion-proof fiber are mixed together and make castable, in castable, the mass ratio of each component is: the corundum aggregate being covered by pitch: 55~65 parts; Schmigel: 25~35 parts; Metallic aluminium powder: 3~4 parts; Explosion-proof fiber: 0.03~0.05 part; Sodium phosphate trimer: 1~3 part;
B) with drill rod, remove oxide and the melt on tapping hole sidewall, it is smooth that the port area that makes to tap a blast furnace keeps; Measure tapping hole center absolute altitude, make 2 to tap a blast furnace stomatodeum centerline hole in same level;
C) in tapping hole, set up casting mold, the castable that step a) is obtained is injected in described casting mold;
D) to water filling in casting mold, and by the oscillating column pump castable of vibrating, bubble in castable is discharged to jolt ramming;
E) to be cast complete, solidify maintenance demoulding after 3~6 hours;
F) after being toasted, castable completes.
As preferably, in described step a), the particle diameter of schmigel is 0.05~0.1mm, by the particle diameter of the corundum aggregate being covered by pitch, is 5~8mm.
As preferably, the temperature of the baking in described step f) is 600 ℃~700 ℃, and the time of baking is 3~4 hours.
As preferably, in described step a), the mass ratio of each component of castable is: the mass percent of each component is: the corundum aggregate being covered by pitch: 55 parts~65 parts; Schmigel: 25 parts~35 parts; Metallic aluminium powder: 3 parts~4 parts; Explosion-proof fiber: 0.03 part~0.05 part; Sodium phosphate trimer: 1 part~3 parts.
As preferably, in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 60 parts; Schmigel: 30 parts; Metallic aluminium powder: 2.5 parts; Explosion-proof fiber: 0.04 part; Sodium phosphate trimer: 2 parts.
As preferably, in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 55 parts; Schmigel: 25 parts; Metallic aluminium powder: 2 parts; Explosion-proof fiber: 0.03 part; Sodium phosphate trimer: 1 part.
As preferably, in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 65 parts; Schmigel: 35 parts; Metallic aluminium powder: 3 parts; Explosion-proof fiber: 0.05 part; Sodium phosphate trimer: 3 parts.
Beneficial effect of the present invention: use on-the-spot one-piece casting to replace traditional ramming mass to repair at tapping hole, improve high-temperature capability and the scour resistance of tapping hole, can effectively extend tapping hole service life, reduce maintenance cost, through the tapping hole of again repairing, can use continuously more than 2 years, can effectively improve the production efficiency of blast furnace.
[specific embodiment]
The renovation technique that the present invention proposes a kind of pair of iron mouth blast furnace iron notch cast-in-site, comprises the steps:
A) by forced mixer, be dry mixed 4~7 minutes after the corundum aggregate being covered by pitch, schmigel, metallic aluminium powder and explosion-proof fiber are mixed together and make castable, in castable, the mass ratio of each component is: the corundum aggregate being covered by pitch: 55~65 parts; Schmigel: 25~35 parts; Metallic aluminium powder: 3~4 parts; Explosion-proof fiber: 0.03~0.05 part; Sodium phosphate trimer: 1~3 part; The particle diameter of schmigel is 0.05~0.1mm, by the particle diameter of the corundum aggregate being covered by pitch, is 5~8mm;
Explosion-proof fiber plays the effect of hydrophobic exhaust in amorphous refractory, the explosion-proof fiber that performance is good can shorten baking time, improves antistrip performance, reduce the loss causing because of explosion, although be that a kind of additive but the effect played can't neglect, in the present invention, adopt superhigh molecular weight polyethylene fibers (being called for short UHMWPE), be again high strength PE fiber.Its molecular weight is between 1,500,000 to 8,000,000, be the decades of times of general fibre, this is also the origin of its name, has extremely excellent performance, mainly comprise: compact structure has very strong chemical inertness, strong acid-base solution and organic solvent on its intensity without any impact; Density only has 0.97 gram/cc, the floating water surface of energy; Water absorption rate is very low, in processing and forming, needn't be dried processing as last; There is fabulous weatherability, uvioresistant, through Exposure to Sunlight, after 1500 hours, fibre strength conservation rate is still up to 80%; Radioactive ray are had to good screening effect, therefore can be used as the shield of nuclear power station; Low temperature resistant, under liquid helium temperature (269 ℃), be still ductile, and aramid fiber just loses shellproof usefulness to-30 ℃; In liquid nitrogen, (195 ℃) also can keep excellent impact strength, and this characteristic is that other plastics are unexistent, thereby can be as the low temperature resistant parts of nuclear industry; Ultra-high molecular weight polyethylene fine young wear-resisting resistance to bend(ing) energy, tension force fatigue behaviour are also the strongest in existing high-performance fiber, have outstanding shock resistance and anti-cutting toughness;
B) with drill rod, remove oxide and the melt on tapping hole sidewall, it is smooth that the port area that makes to tap a blast furnace keeps; Measure tapping hole center absolute altitude, make 2 to tap a blast furnace stomatodeum centerline hole in same level, if 2 tap a blast furnace stomatodeum centerline hole not on the same water surface, after the reparation of band tapping hole completes, by tapping hole of appearance time of tapping a blast furnace long, the phenomenon that another is short, brings difficulty to production;
C) in tapping hole, set up casting mold, the castable that step a) is obtained is injected in described casting mold;
D) to water filling in casting mold, and by the oscillating column pump castable of vibrating, bubble in castable is discharged to jolt ramming;
E) to be cast complete, solidify maintenance demoulding after 3~6 hours, the best is 5 hours;
F) complete after castable is toasted, the temperature of baking is 600 ℃~700 ℃, and the best is 650 ℃, and the time of baking is 3~4 hours, and the best is 3.6 hours.
Specific embodiments of the invention are:
Embodiment mono-:
In described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 60 parts; Schmigel: 30 parts; Metallic aluminium powder: 2.5 parts; Explosion-proof fiber: 0.04 part; Sodium phosphate trimer: 2 parts.
Embodiment bis-:
As preferably, in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 55 parts; Schmigel: 25 parts; Metallic aluminium powder: 2 parts; Explosion-proof fiber: 0.03 part; Sodium phosphate trimer: 1 part.
Embodiment tri-:
As preferably, in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 65 parts; Schmigel: 35 parts; Metallic aluminium powder: 3 parts; Explosion-proof fiber: 0.05 part; Sodium phosphate trimer: 3 parts.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, any scheme after simple transformation of the present invention is all belonged to protection scope of the present invention.

Claims (7)

1. a renovation technique for two iron mouth blast furnace iron notch cast-in-sites, is characterized in that: comprise the steps:
A) by forced mixer, be dry mixed 4~7 minutes after the corundum aggregate being covered by pitch, schmigel, metallic aluminium powder and explosion-proof fiber are mixed together and make castable, in castable, the mass ratio of each component is: the corundum aggregate being covered by pitch: 55~65 parts; Schmigel: 25~35 parts; Metallic aluminium powder: 3~4 parts; Explosion-proof fiber: 0.03~0.05 part; Sodium phosphate trimer: 1~3 part;
B) with drill rod, remove oxide and the melt on tapping hole sidewall, it is smooth that the port area that makes to tap a blast furnace keeps; Measure tapping hole center absolute altitude, make 2 to tap a blast furnace stomatodeum centerline hole in same level;
C) in tapping hole, set up casting mold, the castable that step a) is obtained is injected in described casting mold;
D) to water filling in casting mold, and by the oscillating column pump castable of vibrating, bubble in castable is discharged to jolt ramming;
E) to be cast complete, solidify maintenance demoulding after 3~6 hours;
F) after being toasted, castable completes.
2. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as claimed in claim 1, is characterized in that: in described step a), the particle diameter of schmigel is 0.05~0.1mm, by the particle diameter of the corundum aggregate being covered by pitch, is 5~8mm.
3. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as claimed in claim 1, is characterized in that: the temperature of the baking in described step f) is 600 ℃~700 ℃, and the time of baking is 3~4 hours.
4. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as described in any one in claims 1 to 3, is characterized in that: in described step a), the mass ratio of each component of castable is: the mass percent of each component is: the corundum aggregate being covered by pitch: 55 parts~65 parts; Schmigel: 25 parts~35 parts; Metallic aluminium powder: 3 parts~4 parts; Explosion-proof fiber: 0.03 part~0.05 part; Sodium phosphate trimer: 1 part~3 parts.
5. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as described in any one in claims 1 to 3, is characterized in that: in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 60 parts; Schmigel: 30 parts; Metallic aluminium powder: 2.5 parts; Explosion-proof fiber: 0.04 part; Sodium phosphate trimer: 2 parts.
6. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as described in any one in claims 1 to 3, is characterized in that: in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 55 parts; Schmigel: 25 parts; Metallic aluminium powder: 2 parts; Explosion-proof fiber: 0.03 part; Sodium phosphate trimer: 1 part.
7. the renovation technique of a kind of pair of iron mouth blast furnace iron notch cast-in-site as described in any one in claims 1 to 3, is characterized in that: in described step a), the mass ratio of each component of castable is: the corundum aggregate being covered by pitch: 65 parts; Schmigel: 35 parts; Metallic aluminium powder: 3 parts; Explosion-proof fiber: 0.05 part; Sodium phosphate trimer: 3 parts.
CN201310548777.7A 2013-11-07 2013-11-07 Repairing technology for in-situ pouring of tapholes of double-taphole blast furnace Pending CN103586960A (en)

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CN201310548777.7A CN103586960A (en) 2013-11-07 2013-11-07 Repairing technology for in-situ pouring of tapholes of double-taphole blast furnace

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105039619A (en) * 2015-08-25 2015-11-11 上海宝九和耐火材料有限公司 Semi-detachment type working method for iron tap channel
CN106435073A (en) * 2016-11-11 2017-02-22 武汉宏程冶金材料有限公司 Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks
CN108977603A (en) * 2018-08-23 2018-12-11 中国二十二冶集团有限公司 The restorative procedure that iron notch frame is burnt
CN110195137A (en) * 2019-05-14 2019-09-03 鞍钢股份有限公司 A kind of new masonry iron mouth pore passage preparation method
CN111216216A (en) * 2019-11-22 2020-06-02 安阳钢铁股份有限公司 Plastic pouring process for blast furnace taphole channel
CN114685174A (en) * 2022-04-27 2022-07-01 长兴明天炉料有限公司 High-strength light tapping channel and preparation method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105039619A (en) * 2015-08-25 2015-11-11 上海宝九和耐火材料有限公司 Semi-detachment type working method for iron tap channel
CN106435073A (en) * 2016-11-11 2017-02-22 武汉宏程冶金材料有限公司 Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks
CN106435073B (en) * 2016-11-11 2018-07-03 武汉宏程冶金材料有限公司 A kind of blast furnace lining monolithic casting construction method for substituting spray paint and refractory brick
CN108977603A (en) * 2018-08-23 2018-12-11 中国二十二冶集团有限公司 The restorative procedure that iron notch frame is burnt
CN110195137A (en) * 2019-05-14 2019-09-03 鞍钢股份有限公司 A kind of new masonry iron mouth pore passage preparation method
CN111216216A (en) * 2019-11-22 2020-06-02 安阳钢铁股份有限公司 Plastic pouring process for blast furnace taphole channel
CN114685174A (en) * 2022-04-27 2022-07-01 长兴明天炉料有限公司 High-strength light tapping channel and preparation method thereof
CN114685174B (en) * 2022-04-27 2023-07-14 长兴明天炉料有限公司 High-strength light iron runner and preparation method thereof

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Application publication date: 20140219