CN1730672A - Double layer fireproof linings branch blast tube of blast furnace - Google Patents
Double layer fireproof linings branch blast tube of blast furnace Download PDFInfo
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- CN1730672A CN1730672A CN 200410053542 CN200410053542A CN1730672A CN 1730672 A CN1730672 A CN 1730672A CN 200410053542 CN200410053542 CN 200410053542 CN 200410053542 A CN200410053542 A CN 200410053542A CN 1730672 A CN1730672 A CN 1730672A
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- thermofin
- blast
- blast furnace
- refractory lining
- anchor
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Abstract
Disclosed is a double layer fireproof linings branch blast tube of blast furnace comprising an outer steel housing, an heat-insulation layer, a working lining, the heat-insulation layer is lightweight casting material with an anchoring structure, whose height range is 3-12 mm, the working lining is casting material, the thickness of the heat-insulation layer is greater than 20mm, the thickness of the working lining is between 70-150mm.
Description
Technical field
The present invention relates to a kind of blast furnace refractory materials, blast furnace technology equipment, specifically a kind of double-deck refractory lining blast branch pipe of blast furnace.
Background technology
Existing blowpipe mainly contains 4 kinds, and first kind is that single refractory lining is set in the box hat, adopts unsetting refractory castable cast refractory lining, though that this kind refractory lining is made is simple and convenient, and box hat surface temperature height, for example certain 3200m
3About 400 ℃ of the box hat surface temperature of blast furnace, refractory lining is under the high temperature difference condition for a long time, 1000～1200 ℃ of working faces, 300～400 ℃ of outside surfaces are prone to ring-type and streak flaw, cause the rubescent damage of box hat; Second kind is that refractory fiber floor and refractory castable cast refractory lining are set in the outer box hat, the advantage of this blowpipe is that the box hat surface temperature is low, shortcoming is that the refractory lining steadiness is poor, in case cracking appears in refractory lining, refractory fibre can not guarantee for a long time that box hat is not rubescent; The third is that refractory castable and refractory brick are set in the outer box hat, advantage is for fixing refractory brick and prevents that the refractory brick brickwork joint from causing that box hat is rubescent, outer mould material generally adopts the compact high-strength mould material, and this structural stability is good, and the life-span is long, shortcoming is a refractory brick brick type complexity, process-cycle is long, and the refractory brick price is expensive, and arm is made complicated, the cost height, and the box hat surface temperature is higher; The 4th kind is in adopting outer box hat refractory fibre, refractory castable and refractory brick to be set, and advantage is that the box hat surface temperature is low, and shortcoming is that arm is made complexity more, and cost is higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of double-deck refractory lining blast branch pipe of blast furnace, to overcome the shortcoming of above-mentioned existing blowpipe, reduces the thermosteresis of blast-furnace hot-air, reduces the blast furnace energy consumption, prolongs the work-ing life of arm, improves site work environment.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of double-deck refractory lining blast branch pipe of blast furnace comprises outer box hat, thermofin, work liner, described thermofin by high temperature resistant, volume stability is good, the unsetting anti-material cast of adiabatic matter forms, and can adopt Al
2O
3Weight content is 40～55% lightening casting material, is the lightening casting material of QCI-14H as adopting the trade mark, Al
2O
3Weight content be 55%, maximum operation (service) temperature is 1400 ℃.Thermofin is provided with anchor structure, and the altitude range of anchor structure is 3～12mm, and it is 80～250mm at interval that anchoring distributes; Described work liner is formed by the unsetting anti-material cast that high temperature resistant, gasproof stream wash away, and can adopt Al
2O
3Weight content is 50～95% mould material, and for example can adopt the trade mark is the low cement deposit material of QCL-18S, wherein Al
2O
3Weight content is 95%; The thickness of thermofin is greater than 20mm, and less than 35% of refractory lining total thickness, scope is between 20～100mm; The thickness of work liner is between 70～150mm; The thermofin height is lower than box hat termination 20～40mm.
Described anchor structure can adopt a kind of in V-type, T type, Y type, the L type anchor nails, and the diameter range of anchor nails is 2～6mm, and the anchor nails material is a spheroidal graphite cast iron.
The anchor nails outside is provided with the anchoring net, and anchoring net materials diameter is at 0.3～1.5mm, and sizing grid is 8～20mm, and the anchored grid pattern is selected a kind of of square or prismatic for use, and the anchoring net materials is selected heat-resistance stainless steel for use.
Anchor structure can adopt modes such as welding to be fixed on enclosure.
Because thermal insulation layer of the present invention adopts unsetting anti-material, high temperature resistant, low thermal conductance, high volume stability, and owing at thermofin anchor structure is set, but therefore long term operation does not have tangible volume change at 1300 ℃.The work liner selects that several are high temperature resistant, the unsetting anti-material of high temperature resistant airflow scouring for use; Can stand high temperature and high speed air-flow wearing and tearing for a long time, and good volume stability is arranged, but and the erosion of refractory slag, but long term operation is 1200～1700 ℃ of hot environments.The invention has the beneficial effects as follows:
1. reduction thermosteresis: adopt the present invention, surface temperature on average reduces about 100 ℃ than traditional blowpipe between 260～300 ℃.Press surface-area: 248.69m
2, radiating mode is by the natural convection mode, 20 ℃ of meters of envrionment temperature; Heat dissipation capacity: 7*248.68*80=139266.4Kcal/Hr. per hour
2. prolong blowpipe work-ing life: adopt double-deck refractory lining, reduce of the safety temperature work of box hat temperature, improve the rigidity of box hat to common iron.Bilayer structure has reduced the temperature difference of work refractory lining, has reduced anti-material thermal stresses, has weakened the rimose of anti-material stress.And because be bilayer structure, when cracking appearred in working lining, that passes through thermofin stopped that box hat is not prone to rubescent phenomenon.Effectively prolonged work-ing life.
3. improve operating environment: because the box hat surface temperature reduces, the operator's of operation operating environment has had tangible improvement near arm.Life-span improves, and has reduced the replacing number of times, reduces labor intensity of operating personnel.
4. reduction operational cost:
Manufacturing cost; With same anti-material price, same seat 3200m
3High furnace gauge, because that weight reduces is about 20～25%, by 3.5 tons in every cover, blast furnace 32 covers add up to can save anti-material: 22.4 tons, about 200,000 yuan.
Energy-conservation: 258840.48m
3/ year coke-oven gas.
Description of drawings
Fig. 1: blast branch pipe of blast furnace cross-sectional view of the present invention;
Fig. 2: A-A sectional drawing among Fig. 1;
Fig. 3: L type anchor nails structure for amplifying synoptic diagram
Fig. 4: T type anchor nails structure for amplifying synoptic diagram
Embodiment
Further specify the present invention below in conjunction with accompanying drawing.
The present invention includes outer box hat 1 referring to Fig. 1, Fig. 2, thermofin 2, work liner 3, anchor nails 4, the anchor nails altitude range is 3～12mm, it is 80～250mm at interval that anchoring distributes; Work liner 3 is formed by the unsetting anti-material cast that high temperature resistant, gasproof stream wash away; The thickness of thermofin 2 is greater than 20mm, and less than 35% of refractory lining total thickness, scope is between 20～100mm; The thickness of work liner is between 70～150mm; The thermofin height is lower than box hat termination 20～40mm.
Specific embodiment
Insulating layer material is selected the QCI-135H lightening casting material, the thickness of thermofin is 35mm, the work inner lining material selects QCA-18S to contain the steel fiber corundum pouring material, the work thickness of inner lining is 80mm, and the height of thermofin is lower than box hat termination 20mm, and anchor nails adopts V-type, the diameter of anchor nails is 4mm, the anchor nails material is Q235-A, and the anchor nails height is 12mm, and anchor nails distributes and is spaced apart 100mm.With same 3200m
3Blast furnace with blowpipe relatively adopts first kind of blowpipe surface of prior art surface temperature between 360～400 ℃, adopts the present invention, and surface temperature on average reduces about 100 ℃ between 260～300 ℃.Press surface-area: 248.69m
2, radiating mode is by the natural convection mode, 20 ℃ of meters of envrionment temperature; Per hour heat dissipation capacity: 7*248.68*80=139266.4Kcal/Hr. so the present invention can reduce thermosteresis, improve thermo-efficiency.
Claims (3)
1. double-deck refractory lining blast branch pipe of blast furnace, comprise outer box hat, thermofin, work liner, it is characterized in that described thermofin is a lightening casting material, thermofin is provided with anchor structure, the altitude range of anchor structure is 3～12mm, and it is 80～250mm at interval that anchoring distributes; Described working lining is a mould material; The thickness of thermofin is greater than 20mm, and less than 35% of refractory lining total thickness, scope is between 20～100mm; The thickness of work liner is between 70～150mm; The thermofin height is lower than box hat termination 20～40mm.
2. double-deck refractory lining blast branch pipe of blast furnace according to claim 1 is characterized in that described anchor structure can adopt a kind of in V-type, T type, Y type, the L type anchor nails, and the diameter range of anchor nails is 2～6mm, and the anchor nails material is a straight carbon steel.
3. double-deck refractory lining blast branch pipe of blast furnace according to claim 1, it is characterized in that described anchor nails top is provided with the anchoring net, anchoring net materials diameter is at 0.3～1.5mm, sizing grid is 8～20mm, the anchored grid pattern is selected a kind of of square or prismatic for use, and the anchoring net materials is selected heat-resistance stainless steel for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053542 CN1730672A (en) | 2004-08-06 | 2004-08-06 | Double layer fireproof linings branch blast tube of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053542 CN1730672A (en) | 2004-08-06 | 2004-08-06 | Double layer fireproof linings branch blast tube of blast furnace |
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| CN1730672A true CN1730672A (en) | 2006-02-08 |
Family
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| CN 200410053542 Pending CN1730672A (en) | 2004-08-06 | 2004-08-06 | Double layer fireproof linings branch blast tube of blast furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964377A (en) * | 2013-02-01 | 2014-08-06 | 天津振普筑炉衬里工程有限公司 | Hydroequipment refractory furnace lining structure and preparation method thereof |
| CN106145965A (en) * | 2015-03-31 | 2016-11-23 | 中国科学院大连化学物理研究所 | A kind of lightweight, heat insulation, refractory castable composition and application thereof and preparation method |
-
2004
- 2004-08-06 CN CN 200410053542 patent/CN1730672A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964377A (en) * | 2013-02-01 | 2014-08-06 | 天津振普筑炉衬里工程有限公司 | Hydroequipment refractory furnace lining structure and preparation method thereof |
| CN103964377B (en) * | 2013-02-01 | 2016-02-10 | 天津振普筑炉衬里工程有限公司 | Hydrogen-contacting equipment refractorily lined structure and preparation method thereof |
| CN106145965A (en) * | 2015-03-31 | 2016-11-23 | 中国科学院大连化学物理研究所 | A kind of lightweight, heat insulation, refractory castable composition and application thereof and preparation method |
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