CN201434593Y - Alloy furnace throat steel brick with water cooling - Google Patents
Alloy furnace throat steel brick with water cooling Download PDFInfo
- Publication number
- CN201434593Y CN201434593Y CN2009200437910U CN200920043791U CN201434593Y CN 201434593 Y CN201434593 Y CN 201434593Y CN 2009200437910 U CN2009200437910 U CN 2009200437910U CN 200920043791 U CN200920043791 U CN 200920043791U CN 201434593 Y CN201434593 Y CN 201434593Y
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- steel brick
- alloy
- water pipe
- cooling water
- steel
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Abstract
The utility model discloses an alloy furnace throat steel brick with water cooling, which comprises a steel brick basal body and a cooling water pipe. The brick is characterized in that the steel brick basal body is made of alloy material; the cooling water pipe is made of casting steel; the steel brick basal body is in a shape of U; the cooling water pipe is positioned in the steel brick basal body, and is tightly appressed with the steel brick basal body; and both ends of the cooling water pipe extend out of both ends of the U-shaped steel brick basal body. The utility model uses the alloy material to replace the materials of prior casting steel and the like to manufacture the alloy furnace throat steel brick basal body with water cooling, thereby the capability of the furnace throat steel brick resisting high-temperature erosion can be further enhanced, the generation of air gap between the steel brick basal body and the cooling water pipe can be effectively avoided, and the servicelife of the furnace throat steel brick is prolonged, furthermore the service life of metallurgical high-temperature kiln furnace is prolonged, and the production cost is saved; simultaneously, as thecooling water pipe is directly cast in the steel brick basal body, the combination of the cooling water pipe and the steel brick basal body in a surface micro-melting method is tight, and the coolingeffect and the mechanical property of the alloy furnace throat steel brick with water cooling are enhanced.
Description
Technical field
The utility model relates to a kind of high temperature cooling device, specifically relates to a kind of alloy throat armour that is used for the band water-cooled of metallurgy high temperature stove, belongs to metallurgical ironmaking technology field.
Background technology
Throat armour is the device that cooling and protection are provided for the metallurgy high temperature stove; can protect the metallurgy high temperature stove to avoid the erosion and the mechanical wear of high temperature fluid in the body of heater; prolong the metallurgy high temperature stove life-span; guarantee its safety and stability production; so; the life-span of life-span of throat armour decision metallurgy high temperature stove is metallurgy high temperature stove longevity, efficient, energy-conservation important assurance.
The material of the throat armour that current domestic and international metallurgical industry is generally adopted is based on cast iron, but, there are many deficiencies in the cast iron throat armour, with most popular spheroidal graphite cast-iron throat armour is example: (1) spheroidal graphite cast-iron throat armour must add anti-carburization coating outside the cooling duct, make between passage and the matrix and form air gap, and air gap makes the throat armour heat transmission resistance significantly increase, worsened the heat-transfer effect of throat armour, increase the working face temperature of throat armour, quickened the breakage of throat armour; (2) be covered with the globular graphite (particle diameter 0.025～0.150mm) that varies in size on the spheroidal graphite cast-iron matrix, countless small holes have been equivalent to form after globular graphite is oxidized, constituted the cradle that crack and crackle take place, quickened the expansion of crack and crackle, thereby cause throat armour to shorten service life, increase resource consumption, be unfavorable for throat armour longevity, energy-conservation; (3) when the large-scale spheroidal graphite casting of casting, C, S, P are pushed to liquid zone easily in the column crystallization process, form a segregation thing enrichment region in center equiax crystal district, the percentage elongation at cast(ing) surface and center is existed than big-difference, the surface percentage elongation is greater than the centre more than one times, promote the generation and the expansion of spheroidal graphite cast-iron crack or crackle, be unfavorable for throat armour longevity; (4) linear expansion coefficient of spheroidal graphite cast-iron is more steady in variation below 600 ℃, but more than 600 ℃ then the rising with temperature rapid irreversible " growth " takes place, when temperature during greater than 709 ℃ matrix phase transformation has taken place, the coefficient of expansion and internal stress sharp increase, its breakage speeds up; (5) spheroidal graphite cast-iron thermal conductivity and thermal shock resistance are all relatively poor, and its thermal conductivity factor only is 30wm
-2K
-1, be unfavorable for the efficient cooling of throat armour.
From domestic and international research situation to throat armour, less in the application problem research of metallurgical industry abroad to the alloy throat armour of band water-cooled, and it is domestic because metallurgical industry is very big to the throat armour demand, therefore the alloy throat armour to the band water-cooled has carried out Primary Study, domestic indivedual enterprise puts into practice the production of the alloy throat armour of band water-cooled, but the result is not satisfactory, main cause comprises five aspects, first, in cast cooling wall process, cooling water pipe is very easily by the high-temperature molten steel burn through, the percent defective height; The second, in casting process, weld a large amount of chills at the cooling water pipe outer surface, the chill fusing not exclusively destroys the overall mechanical properties of cooling water pipe and cooling wall matrix, and impels air gap to produce severe exacerbation cooling wall heat transfer property; The 3rd, in casting process, cooling duct inner easily generation oxidation, product quality reduces greatly; The 4th, molten steel cleaningization technology lacks system research in cast steel cooling wall one-time cast-forming process, the properties of product instability; The 5th, the cooling wall of metallurgical industry belongs to thick and large casting, and mass defects such as the pore of thick and large casting, loose, segregation solve at casting industry always as yet fully.In addition, the Technology for Heating Processing shortage system research at cast steel cooling wall does not propose specification of heat treatment as yet.Therefore, the alloy throat armour yield rate of band water-cooled is not high, and performance is not good, and the life-span is not long.
The utility model content
In order to overcome the problem that prior art exists, the purpose of this utility model is to provide the alloy throat armour of a kind of long service life, efficient, energy-conservation band water-cooled, and the realization room temperature tensile strength is 650N/mm
2More than, Hs hardness is greater than 35, and ballistic work is greater than 18J/cm
2, reach 15 years service life.
For achieving the above object, the utility model is to realize by following technical scheme:
A kind of alloy throat armour with water-cooled, comprise steel brick matrix, cooling water pipe, it is characterized in that described steel brick matrix is an alloy material, the cooling water pipe material is a cast steel, steel brick matrix is a U-shaped, cooling water pipe is positioned at steel brick matrix, combines closely in the little molten mode in surface with steel brick matrix, and stretch out from two ends of U-shaped steel brick matrix at its two ends.
The alloy throat armour of aforesaid band water-cooled, the cross section that it is characterized in that described cooling water pipe is for oval.
The alloy throat armour of aforesaid band water-cooled, the length ratio that it is characterized in that described cooling water pipe minor axis and major axis is 0.5～0.7.
The alloy throat armour of aforesaid band water-cooled is characterized in that also being provided with protective casing on the outer surface of described cooling water pipe end.
The alloy throat armour of aforesaid band water-cooled is characterized in that described cooling water pipe is many, only shows little melting in casting process, and remelting and crystallization more do not take place substantially, is keeping the original good rolling performance of cooling water pipe.
The alloy throat armour of aforesaid band water-cooled is characterized in that also comprising positioning bolt hole and cross temperature hole.
The alloy throat armour of aforesaid band water-cooled is characterized in that described positioning bolt hole is a plurality of, is convenient to firmly contact with High-temp. kiln.
The alloy throat armour of aforesaid band water-cooled is characterized in that the essential element of described alloy material is: C%:0.1%-0.5%, and Mn:5-15%, Cr:15-20%, Ni:2-8%, Mo:0.1-1%, all the other are Fe.
The beneficial effects of the utility model are: materials such as the alternative existing cast iron of the utility model employing alloy material are made the alloy throat armour matrix of band water-cooled, adopt cast steel material to make cooling water pipe, can strengthen the ability of throat armour opposing high temperature erosion, can effectively avoid producing air gap between steel brick matrix and cooling water pipe, strengthened the cooling performance of throat armour, prolonged the service life of the alloy throat armour of band water-cooled, and then prolonged life-span of metallurgy high temperature kiln, saved production cost; Simultaneously because cooling water pipe is cast directly in the steel brick matrix, so its very tight with steel brick matrix bond has improved cooling effect and the mechanical performance of being with the alloy throat armour of water-cooled.
Description of drawings
Fig. 1 is the structural representation of the alloy throat armour of band water-cooled of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view.
Main mark implication among the figure:
1, steel brick matrix 2 cooling water pipes 3, protective casing 4, cross temperature hole 5, positioning bolt hole
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
Fig. 1 is the structural representation of the alloy throat armour of band water-cooled of the present utility model; Fig. 2 is that the A of Fig. 1 is to view.
As depicted in figs. 1 and 2: a kind of alloy throat armour with water-cooled; comprise steel brick matrix 1, cooling water pipe 2, protective casing 3, cross temperature hole 4 and positioning bolt hole 5; the material of steel brick matrix 1 is an alloy material; the essential element of alloy material is: C%:0.1%-0.5%; Mn:5-15%, Cr:15-20%, Ni:2-8%; Mo:0.1-1%, all the other are Fe.The material of cooling water pipe 2 is a cast steel; steel brick matrix 1 is a U-shaped; cooling water pipe 2 is positioned at steel brick matrix 1; fit tightly with steel brick matrix 1; stretch out from two ends of U-shaped steel brick matrix 1 at its two ends; the cross section of cooling water pipe 2 is oval; major axis is 0.5～0.7 with the length ratio of minor axis; in order to improve cooling effect; cooling water pipe 2 can adopt many; what present embodiment adopted is 4, is arranged on abreast in the steel brick body 1, and protection pipe box 3 is enclosed within on the outer surface of cooling water pipe 2 ends; and cross temperature hole 4 and positioning bolt hole 5 lay respectively at U-shaped steel brick matrix 1 two ends on; wherein positioning bolt hole 5 is a plurality of, is convenient to firmly contact with High-temp. kiln, and what present embodiment adopted is 4.
Embodiment 1: the cross section of aforementioned cooling water pipe 2 is oval, and minor axis is 0.5 with the length ratio of major axis.
Embodiment 2: the cross section of aforementioned cooling water pipe 2 is oval, and minor axis is 0.6 with the length ratio of major axis.
Embodiment 3: the cross section of aforementioned cooling water pipe 2 is oval, and minor axis is 0.7 with the length ratio of major axis.
The utility model is chosen to be cast steel and alloy material respectively with the material of cooling water pipe 2 and the basic material of steel brick matrix 1, has effectively avoided a series of problems of using anti-carburization coating and bringing; Cooling water pipe 2 is cast directly over steel brick matrix 1 inside; in casting process; utilize composite solid cooling medium to pass through cooling water pipe 2 with fluid; protection cooling water pipe 2 melts and does not change; impel cooling water pipe 2 surface in casting process little molten; fit tightly with steel brick matrix 1; do not produce air gap; remelting and crystallization more do not take place substantially; keeping the original good rolling performance of cooling water pipe; and the process of setting of control steel brick matrix 1, the condition of formation consecutive solidification, the performance of the alloy throat armour of raising band water-cooled.
The cardinal principle that the alloy throat armour of band water-cooled of the present utility model is applied to the metallurgy high temperature stove is: will place the high-temperature area inboard of metallurgy high temperature stove with the alloy throat armour of water-cooled, cooling medium (such as: water) press certain flow velocity passes through the band water-cooled from the lower port of the cooling water pipe 2 of the alloy throat armour of band water-cooled alloy throat armour inside, by this way, heat is passed to the steel brick matrix 1 of the alloy throat armour of band water-cooled from metallurgy high temperature stove inside, cooling medium is taken heat out of the metallurgy high temperature stove from steel brick matrix 1 again, make the furnace shell of metallurgy high temperature stove avoid high temperature erosion, thereby prolong the service life of metallurgy high temperature stove.By regulating the cooling performance that cooling water flow and flow velocity come the alloy throat armour of accommodation zone water-cooled.
The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection domain of the present utility model.
Claims (8)
1, a kind of alloy throat armour with water-cooled, comprise steel brick matrix, cooling water pipe, it is characterized in that described steel brick matrix is an alloy material, the cooling water pipe material is a cast steel, steel brick matrix is a U-shaped, cooling water pipe is positioned at steel brick matrix, combines closely in the little molten mode in surface with steel brick matrix, and stretch out from two ends of U-shaped steel brick matrix at its two ends.
2, the alloy throat armour of band water-cooled according to claim 1, the cross section that it is characterized in that described cooling water pipe is for oval.
3, the alloy throat armour of band water-cooled according to claim 2, the length ratio that it is characterized in that described cooling water pipe minor axis and major axis is 0.5～0.7.
4, the alloy throat armour of band water-cooled according to claim 1 is characterized in that also being provided with protective casing on the outer surface of described cooling water pipe end.
5,, it is characterized in that described cooling water pipe is many according to the alloy throat armour of each described band water-cooled of claim 1 to 4.
6, the alloy throat armour of band water-cooled according to claim 1 is characterized in that also comprising positioning bolt hole and cross temperature hole.
7, the alloy throat armour of band water-cooled according to claim 6 is characterized in that described positioning bolt hole is a plurality of.
8, the alloy throat armour of band water-cooled according to claim 1 is characterized in that the essential element of described alloy material is: C%:0.1%-0.5%, and Mn:5-15%, Cr:15-20%, Ni:2-8%, Mo:0.1-1%, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200437910U CN201434593Y (en) | 2009-05-31 | 2009-05-31 | Alloy furnace throat steel brick with water cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200437910U CN201434593Y (en) | 2009-05-31 | 2009-05-31 | Alloy furnace throat steel brick with water cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201434593Y true CN201434593Y (en) | 2010-03-31 |
Family
ID=42053403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200437910U Expired - Fee Related CN201434593Y (en) | 2009-05-31 | 2009-05-31 | Alloy furnace throat steel brick with water cooling |
Country Status (1)
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|---|---|
| CN (1) | CN201434593Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526128A (en) * | 2012-07-06 | 2014-01-22 | 江苏耐尔冶电集团有限公司 | Formula of blast furnace throat steel brick |
-
2009
- 2009-05-31 CN CN2009200437910U patent/CN201434593Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526128A (en) * | 2012-07-06 | 2014-01-22 | 江苏耐尔冶电集团有限公司 | Formula of blast furnace throat steel brick |
| CN103526128B (en) * | 2012-07-06 | 2015-12-09 | 江苏耐尔冶电集团有限公司 | The formula of blast furnace throat steel brick |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20140531 |