CN201438079U - Vault structure of iron-making smelting reduction gasification furnace - Google Patents
Vault structure of iron-making smelting reduction gasification furnace Download PDFInfo
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- CN201438079U CN201438079U CN2009200697161U CN200920069716U CN201438079U CN 201438079 U CN201438079 U CN 201438079U CN 2009200697161 U CN2009200697161 U CN 2009200697161U CN 200920069716 U CN200920069716 U CN 200920069716U CN 201438079 U CN201438079 U CN 201438079U
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- vault
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- anchoring piece
- refractory
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Abstract
The utility model relates to a vault structure of an iron-making smelting reduction gasification furnace. The vault structure is divided into an upper part and a lower part, between which a transitional belt is arranged; the spherical surface of a vault is provided with a coal feed inlet, a direct-reduced iron feed inlet, a produced gas pipe port, a safe pipe and a manhole; a furnace shell of the upper part of the vault is provided with short and long anchoring elements, and light insulating unshaped refractory is sprayed on the short anchoring element layer to serve as an upper-part permanent insulating layer; the long anchoring elements penetrate the light refractory of the permanent layer, dense unshaped refractory is sprayed on the long anchoring elements and the insulating layer to serve as an upper-part work layer; light insulating bricks are masoned on the inner surface of a furnace shell of the lower part of the vault to serve as a lower-part permanent layer; high-strength heavy dense refractory bricks are masoned on the upper inner work surface of the lower-part permanent layer to serve as a lower-part work layer; and a circular compressible ceramic fiber mat is arranged at the junction between the unshaped material-sprayed area of the upper part of the vault and the shaped refractory brick area of the lower part to serve as an expansion gap.
Description
Technical field
The utility model belongs to the metallurgical industry furnace technical field of structures, the reduction and gaseous chimney arch roof construction of particularly a kind of fused during iron making.
Background technology
Short flow process iron-smelting process technology has become the development trend of world's iron-smelting process advanced technology because advantages such as its environmental protection, energy-conservation, small investments.Wherein the two step method ironmaking technique of fusion and reduction is one of iron-smelting process technology that can realize suitability for industrialized production, and the capital equipment of this iron-smelting process is made up of reduction shaft furnace, melting gasification furnace, hot cyclone dust collectors, pipe-line system and relevant accessory system.Wherein the melting and reducing gasification furnace is the equipment of this iron-smelting process most critical, from furnace binding, is divided into vault district, semicoke bed district, cupola well and furnace bottom four parts.Iron ore is directly become sponge iron by gas reduction in reduction shaft furnace, join in the melting gasification furnace, and coal also directly joins in the melting gasification furnace, and the heat that coal combustion produces is used to melt sponge iron, produces liquid molten iron.Good reduction effect is arranged in order to guarantee to smelt iron, the reducing gas temperature need maintain about 850 ℃, and at the gasification furnace vault, in order to guarantee the lytic effect of coal fugitive constituent, dome temperature need maintain about 1050 ℃.And use 99.5% pure oxygen and coal generation chemical reaction, realize the melting reduction of molten iron.So the working environment that vault bears is very harsh.The application of melting and reducing gasification furnace vault construction and anti-material thereof is the key factor of restriction stove longevity.According to investigation, the fused reduction iron-smelting device of South Africa Sa Erdana, Korea S's Pu item, India Jin Daer all has similar vault, but well damage in producing, life-span are short.
The fused reduction iron-smelting device of South Africa Sa Erdana, Korea S's Pu item, India Jin Daer belongs to older generation's fused reduction iron-smelting device, and not only the volume of melting gasification furnace is little, yield poorly, and great changes has taken place for operating mode and smelting condition.From external actual production, gasification furnace vault construction and anti-material are the key factors that influences furnace life, production operational availability.
The whole hemisphere of older generation's fused reduction iron-smelting device vault all is to be furnished with anchoring piece, the overall structure that sprays unshape refractory on anchoring piece again forms, the bottom erosion damage of vault hemisphere is very serious during production, and top refractory material working lining comes off, peels off, cracking phenomena is obvious, therefore whole vault zone stop production to overhaul frequency is very high, the life-span is not long yet after repairing, the material configuration existing problems are not only in this explanation, and structural design is unreasonable also to be to cause one of reason that vault damages.
At the similar problem that exists of melting and reducing gasification furnace in the world, a new generation's fused reduction iron-smelting device has been done to optimize and improve to the structure of gasification vault and the refractory material of application, make it to be more suitable for the needs of high temperature, hyperoxia, high pressure smelting condition, realized that vault construction is stable, the target that serviceability is good.Melting and reducing gasification furnace vault construction is compared different fully with blast furnace, shape and structure is different, and working condition is more complicated.The gasification furnace dome temperature is 1000 ℃, also contains a large amount of dust.Therefore, melting and reducing gasification furnace vault need stand high temperature, high pressure, contain washing away, corroding of a large amount of dust coal gas.
Summary of the invention
The purpose of this utility model is to design the reduction and gaseous chimney arch roof construction of a kind of fused during iron making, by to vault construction and material configuration technology, guarantees the target call of production direct motion and gasification furnace longevity.
For achieving the above object, the technical solution of the utility model is,
The reduction and gaseous chimney arch roof construction of a kind of fused during iron making is characterized in that this vault construction is divided into the upper and lower, is provided with intermediate zone between the upper and lower part; Coal filling hole, DRI charge door are set on the vault sphere, gas pipe road junction, safety corridor and man-hole opening and platform installing hole take place; Short, long anchoring piece are set on the furnace shell of vault top, and spraying light thermal-insulation unshape refractory on the short anchoring piece layer of laying is as the permanent thermal insulation layer in top; Long anchoring piece passes through the lightweight refracrory of permanent layer, and the fine and close unshape refractory of spraying on long anchoring piece and permanent thermal insulation layer is as the top working lining; Two-double spray coating material vault construction is formed at vault top; Vault bottom furnace shell inner surface is built light-weight insulating brick by laying bricks or stones, as the bottom permanent layer; The stove inner working face is built high-strength heavy dense firebrick by laying bricks or stones on the permanent layer of bottom, as the bottom working lining; The double-decker of shaped refractory brick is formed at the vault bottom; What the intersection that vault top sprays unsetting material sections and shaped refractory brick zone, bottom was provided with annular has compressible ceramic fibre mat as dilatation joint.
Because melting and reducing gasification furnace vault is different fully with the State of Blast Furnace roof construction, and compares with other melting and reducing gasification furnace vault, its diameter is big, and working condition is more complicated.The utility model is designed to two zones with melting and reducing gasification furnace vault hemisphere, disposes different refractory linings.And vault is an overall structure in the prior art, all adopts the sprayed on material construction.
Vault hemisphere top is two-double spray coating material vault construction, and short anchoring piece is set on the furnace shell, and the vault anchoring piece requires that higher high-temperature oxidation resistance and high temperature creep property are arranged, and guarantees not oxidation distortion under high temperature and long-time service condition.Spraying light thermal-insulation unshape refractory as the top permanent layer, can reduce the loss of furnace heat on the anchoring piece layer of laying, and another fixed heat insulating function protects furnace shell that suitable operating temperature is arranged simultaneously; Long anchoring piece is set on the furnace shell, pass through the lightweight refracrory of permanent layer, the permanent thermal insulation layer in top and top working lining anchoring piece keep the interval of 200-300mm, and permanent layer is staggeredly arranged with the working lining anchoring piece, and gasification furnace furnace roof anchoring piece is intensive layout at this moment.On long anchoring piece and top permanent layer, spray fine and close unshape refractory again, as the top working lining.This fine and close unshape refractory adds the part heat-resistant steel fiber, to increase the intensity and the anti-thermal shock stability of vault working lining.
Vault hemisphere bottom is that bilayer is built firebrick structure by laying bricks or stones.Bilayer is built the scope that firebrick structure reduces the upper part of double spray paint by laying bricks or stones, helps stablizing of structure and increasing substantially of performance.Because the anti-material of gasification furnace vault is when blow-on and damping down, dome temperature changes greatly, will stand high temperature, high pressure in addition, contain washing away, corroding of a large amount of dust coal gas, so the vault working lining must have good thermal shock resistance, intensity, toughness and wear-resisting performance.Can avoid working lining to come off, peel off or cracking phenomena like this.
What this intersection that vault top sprays unsetting material sections and shaped refractory brick zone, bottom was provided with annular has compressible ceramic fibre mat as dilatation joint, eliminates structural stress and the hot swelling stress of material down, in order to avoid cause the vault construction damage.And structural dilatation joint is not set in the prior art.
DRI (DRI) charge door and vault junction are damaged the most severe, because sponge iron enters in the gasification furnace from this mouthful, to tremie pipe junction serious wear, if also adopt original spray paint, intensity is obviously not enough.So in vault and DRI tremie pipe junction, impact greatly in order to adapt to its friction, the temperature height corrodes serious problem, local working lining adopts compact high-strength to water material feeding.Change employing sprayable refractory in the past, guarantee the integrality of vault construction.
The beneficial effects of the utility model
The utility model is divided into two zones up and down with melting and reducing gasification furnace vault, has different structure and material configurations, is fit to different conditions of work respectively, can keep the synchronism in this two-part structure life-span, has brought advantageous effect for the production direct motion.
The selection of the intersection in vault top employing unsetting material area of spraying and bottom employing setting material refractory brick zone is stable significant to vault construction, what annular was set at this place has compressible ceramic fibre mat as dilatation joint, eliminate structural stress and the hot swelling stress of different materials down, avoided the vault construction damage.
Adopt Lightweight Spray Refractory and light-weight insulating brick near the furnace shell face, reduce the loss of vault heat, protected furnace shell again; Working face has adopted the fine and close spray paint and the high-strength heavy refractory brick of steel fibre enhancing, not only meets the convenience of construction, has also satisfied the condition of work of vault harshness better; Adopt compact high-strength to water material feeding again in vault DRI blanking junction.Overcome the problem of this position serious wear.
Version that the utility model technology adopts and material configuration can satisfy the working condition demand of large diameter vault design and melting and reducing gasification furnace complexity, and vault easy construction, material configuration are more reasonable, realized each position life-span equilibrium well, the target that the vault bulk life time prolongs.
Description of drawings
Fig. 1 is the structural representation of the utility model melting and reducing vault;
Fig. 2 is the structural representation of the utility model DRI charge door and vault junction.
The specific embodiment
Referring to Fig. 1, the reduction and gaseous chimney arch roof construction of fused during iron making of the present utility model is divided into top I and bottom II, is provided with intermediate zone between the upper and lower part; Coal filling hole 16, DRI DRI charge door 15 are set on vault 1 sphere, gas pipe road junction 18, safety corridor 17, man-hole opening 19 take place;
Vault bottom II furnace shell 1 inner surface is built light-weight insulating brick 9 by laying bricks or stones, as bottom permanent layer 4; The stove inner working face is built high-strength heavy dense firebrick 10 by laying bricks or stones on the permanent layer 4, as bottom working lining 5; The double-decker of shaped refractory brick is formed at the vault bottom;
What the intersection that vault top sprays unsetting material sections and shaped refractory brick zone, bottom was provided with annular has compressible ceramic fibre mat as dilatation joint 6.
The described permanent thermal insulation layer 2 in vault top is staggeredly arranged with the anchoring piece 13,14 of working lining 3.Permanent thermal insulation layer in described top and top working lining anchoring piece keep the interval of 200～300mm.Add heat-resistant steel fiber in the fine and close unshape refractory of described top working lining.
Referring to Fig. 2, DRI DRI charge door 15 adopts compact high-strength to water material feeding 11 with the top working lining 3 of vault junction.
Adopt iron-smelting furnace vault of the present utility model zone to use and the peeling phenomenon of anti-the material do not occur, vault furnace shell hull-skin temperature maintains 120～130 ℃.
Claims (4)
1. the reduction and gaseous chimney arch roof construction of fused during iron making is characterized in that this vault construction is divided into the upper and lower, is provided with intermediate zone between the upper and lower part; Coal filling hole, DRI charge door are set on the vault sphere, gas pipe road junction, safety corridor and man-hole opening take place;
Short, long anchoring piece are set on the furnace shell of vault top, and spraying light thermal-insulation unshape refractory on the short anchoring piece layer of laying is as the permanent thermal insulation layer in top; Long anchoring piece passes through the lightweight refracrory of permanent layer, and the fine and close unshape refractory of spraying on long anchoring piece and permanent thermal insulation layer is as the top working lining; Two-double spray coating material vault construction is formed at vault top;
Vault bottom furnace shell inner surface is built light-weight insulating brick by laying bricks or stones, as the bottom permanent layer; The stove inner working face is built dense firebrick by laying bricks or stones on the permanent layer, as the bottom working lining; The double-decker of shaped refractory brick is formed at the vault bottom;
What the intersection that vault top sprays unsetting material sections and shaped refractory brick zone, bottom was provided with annular has compressible ceramic fibre mat as dilatation joint.
2. the reduction and gaseous chimney arch roof construction of fused during iron making as claimed in claim 1 is characterized in that the anchoring piece of permanent thermal insulation layer in described top and top working lining is staggeredly arranged.
3. the reduction and gaseous chimney arch roof construction of fused during iron making as claimed in claim 1 or 2 is characterized in that, permanent thermal insulation layer in described top and top working lining anchoring piece keep the interval of 200～300mm.
4. the reduction and gaseous chimney arch roof construction of fused during iron making as claimed in claim 1 is characterized in that, the top working lining of DRI charge door and vault junction adopts compact high-strength to water material feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200697161U CN201438079U (en) | 2009-03-31 | 2009-03-31 | Vault structure of iron-making smelting reduction gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200697161U CN201438079U (en) | 2009-03-31 | 2009-03-31 | Vault structure of iron-making smelting reduction gasification furnace |
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| Publication Number | Publication Date |
|---|---|
| CN201438079U true CN201438079U (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200697161U Expired - Lifetime CN201438079U (en) | 2009-03-31 | 2009-03-31 | Vault structure of iron-making smelting reduction gasification furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618683A (en) * | 2012-03-30 | 2012-08-01 | 宝山钢铁股份有限公司 | Method for controlling temperature of vault of fusion gasification furnace |
| CN103608304A (en) * | 2012-05-30 | 2014-02-26 | 旭硝子陶瓷株式会社 | Crown structure |
| CN104748549A (en) * | 2015-04-03 | 2015-07-01 | 沈阳鑫博工业技术股份有限公司 | Top cover structure of industrial kiln |
-
2009
- 2009-03-31 CN CN2009200697161U patent/CN201438079U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618683A (en) * | 2012-03-30 | 2012-08-01 | 宝山钢铁股份有限公司 | Method for controlling temperature of vault of fusion gasification furnace |
| CN102618683B (en) * | 2012-03-30 | 2013-12-25 | 宝钢集团有限公司 | Method for controlling temperature of vault of fusion gasification furnace |
| CN103608304A (en) * | 2012-05-30 | 2014-02-26 | 旭硝子陶瓷株式会社 | Crown structure |
| CN103608304B (en) * | 2012-05-30 | 2016-03-09 | 旭硝子陶瓷株式会社 | Large vault canopy structure |
| CN104748549A (en) * | 2015-04-03 | 2015-07-01 | 沈阳鑫博工业技术股份有限公司 | Top cover structure of industrial kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOGANG GROUP CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20121231 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200122 PUDONG NEW AREA, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121231 Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: Baosteel Group Corporation Address before: 201900 Shanghai City, Mudanjiang Road No. 1813 South Patentee before: Baoshan Iron & Steel Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100414 |
|
| CX01 | Expiry of patent term |