CN217844739U - Refractory masonry structure of shaft furnace hot-blast stove - Google Patents
Refractory masonry structure of shaft furnace hot-blast stove Download PDFInfo
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- CN217844739U CN217844739U CN202221079624.3U CN202221079624U CN217844739U CN 217844739 U CN217844739 U CN 217844739U CN 202221079624 U CN202221079624 U CN 202221079624U CN 217844739 U CN217844739 U CN 217844739U
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Abstract
The utility model discloses a shaft furnace hot-blast furnace refractory masonry structure, this hot-blast furnace include the combustion chamber and with the air mixing chamber of combustion chamber intercommunication, the flame path mouth is seted up on air mixing chamber lateral wall upper portion, the air mixing chamber top is the vault structure, the vault structure is including locating the first special-shaped brick at air mixing chamber both sides wall top respectively and locating the second special-shaped brick in the middle of two first special-shaped bricks, two first special-shaped brick opposite face is inward hypotenuse respectively, and the upper portion of two hypotenuses is sunken formation overlap joint face to both sides respectively, second special-shaped brick both sides coincide with first special-shaped brick concatenation face respectively, realize seamless concatenation, and the bottom forms domes after the first special-shaped brick of both sides and the concatenation of middle second special-shaped brick. The utility model provides a common phenomenon such as shaft furnace hot-blast furnace high temperature area resistant material wearing and tearing, warp, hunch-up to hot-blast furnace heat storage capacity has been improved.
Description
Technical Field
The utility model belongs to the technical field of the metallurgical technology and specifically relates to a resistant material masonry structure of shaft furnace hot-blast furnace.
Background
In the production process of shaft furnace pellets, the whole process of pellet solid-phase consolidation is completed by 5 stages of drying, preheating, roasting, soaking and cooling after green pellets are put into a furnace. The hot blast stove is responsible for providing a heat source in the stove in the production process of the shaft furnace pellets, is a high-temperature area of the stove body, and has the temperature of 1000-1250 ℃.
At present, the construction process of the rectangular shaft furnace hot blast stove in the industry is mainly divided into two types, namely an integrated type and a two-section type. The hot blast stove of our factory is an integrated masonry process. In the past production practice, the phenomena of furnace body steel plate burnthrough and hot waste gas leakage are often caused, and the potential safety hazards of high-temperature scald and gas leakage exist. When the furnace is serious, the furnace body is deformed, and refractory materials in the furnace are shifted and arched, so that the production is interrupted.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the deficiency of the background art, the utility model discloses a refractory masonry structure of a shaft furnace hot blast stove.
The technical scheme is as follows: the utility model discloses a shaft furnace hot-blast furnace refractory masonry structure, this hot-blast furnace include the combustion chamber and with the air mixing chamber of combustion chamber intercommunication, the flame path mouth is seted up on air mixing chamber lateral wall upper portion, the air mixing chamber top is the vault structure, the vault structure is including locating the first special-shaped brick at air mixing chamber both sides wall top respectively and locating the second special-shaped brick in the middle of two first special-shaped bricks, two first special-shaped brick opposite face is inward hypotenuse respectively, and the upper portion of two hypotenuses is respectively to the sunken overlap joint face that forms in both sides, second special-shaped brick both sides coincide with first special-shaped brick concatenation face respectively, realize seamless concatenation, and the first special-shaped brick of both sides forms domes with middle second special-shaped brick concatenation back bottom.
Furthermore, the peripheries of the gas mixing chamber and the fire hole are made of corundum-mullite materials, and the technical requirements are as follows: AL 2 O 3 The percent is more than or equal to 80 percent; body density g/cm 3 Not less than 2.7; the refractoriness is more than or equal to 1790 ℃; the compressive strength is more than or equal to 80MPa; the softening starting temperature under 0.2MPa load is more than or equal to 1550 ℃.
Further, the masonry slurry is phosphate mullite, and the technical requirements are as follows: AL 2 O 3 More than or equal to 65 percent, more than or equal to 1.8 percent of bulk density, 110 ℃ of bond rupture strength, 24h more than or equal to 2.5Mpa,1500 ℃ of rupture strength, 3h more than or equal to 8Mpa, and 1450 ℃ of refractoriness under load.
Has the advantages that: compared with the prior art, the utility model has the advantages that: the common phenomena of abrasion, deformation, arching and the like of refractory materials in a high-temperature area of the shaft furnace hot blast stove are solved, and the heat storage capacity of the hot blast stove is improved; after the shaft furnace is tried out, the effect is obvious, and the use amount of coal gas per ton is reduced by 10 percent. Calculated according to 200 ten thousand tons of annual output of 3 shaft furnaces, the coal gas is saved by about 200 × 0.085=17 ten thousand GJ, and the direct benefit is 17 × 32 yuan/GJ =544 ten thousand yuan/year; the service life of the refractory in the high-temperature area is prolonged by 1 time, and the annual refractory spare part cost is about 120 ten thousand yuan (3 shaft furnaces); the refractory material in the high-temperature area is not subjected to production interruption and hot waste gas leakage caused by deformation, so that the potential safety hazards of high-temperature scalding and gas poisoning are avoided.
Drawings
Fig. 1 is a sectional view of the structure of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
The utility model provides a shaft furnace hot-blast furnace refractory masonry structure, this hot-blast furnace include combustion chamber 1 and with the air mixing chamber 2 of 1 intercommunication of combustion chamber, flame path mouth 3 is seted up on 2 lateral wall upper portions of air mixing chamber, 2 tops of air mixing chamber are the vault structure, the vault structure is including locating the first special-shaped brick 4 at 2 both sides wall tops of air mixing chamber respectively and locating the second special-shaped brick 5 in the middle of two first special-shaped bricks 4, two first special-shaped brick 4 opposite face is inwards hypotenuse respectively, and the upper portion of two hypotenuses is sunken formation overlap joint face respectively to both sides, 5 both sides of second special-shaped brick coincide with first special-shaped brick 4 concatenation face respectively, realize seamless concatenation, and the first special-shaped brick 4 of both sides forms domes with 5 concatenation back bottoms of middle second special-shaped brick and form domes.
The peripheries of the gas mixing chamber 2 and the fire hole 3 are both made of corundum-mullite materials. The technical requirements are as follows: AL 2 O 3 The percent is more than or equal to 80 percent; body density g/cm 3 Not less than 2.7; the refractoriness is more than or equal to 1790 ℃; the compressive strength is more than or equal to 80MPa; the softening starting temperature under 0.2MPa load is more than or equal to 1550 ℃.
The masonry slurry is phosphate mullite, and the technical requirements are as follows: AL 2 O 3 More than or equal to 65 percent, more than or equal to 1.8 percent of bulk density, 110 ℃ of bond rupture strength, 24h more than or equal to 2.5Mpa,1500 ℃ of rupture strength, 3h more than or equal to 8Mpa, and 1450 ℃ of refractoriness under load. After the refractory material is integrally built, the refractory material undergoes low-temperature and high-temperature stages by using wood and coal gasAnd (3) baking the furnace, solidifying and molding the refractory materials, performing grouting treatment in a high-temperature area of the shaft furnace body after the shaft furnace is subjected to heat load production for 72 hours, and further filling gaps among the refractory materials.
Claims (3)
1. The utility model provides a refractory masonry structure of shaft furnace hot-blast furnace, this hot-blast furnace include combustion chamber (1) and with gas mixing chamber (2) of combustion chamber (1) intercommunication, gas mixing chamber (2) lateral wall upper portion sets up flame path mouth (3), its characterized in that: the top of the gas mixing chamber (2) is of a vault structure, the vault structure comprises first special-shaped bricks (4) and second special-shaped bricks (5), the first special-shaped bricks (4) are arranged on the tops of two side walls of the gas mixing chamber (2) respectively, the second special-shaped bricks (5) are arranged in the middle of the two first special-shaped bricks (4), opposite surfaces of the first special-shaped bricks (4) are inwards inclined edges respectively, the upper portions of the two inclined edges are sunken to two sides respectively to form overlapping surfaces, the two sides of the second special-shaped bricks (5) are matched with the splicing surfaces of the first special-shaped bricks (4) respectively to realize seamless splicing, and the bottoms of the first special-shaped bricks (4) on two sides and the second special-shaped bricks (5) in the middle are spliced to form an arch structure.
2. The refractory masonry structure for a shaft furnace hot blast stove according to claim 1, characterized in that: the peripheries of the gas mixing chamber (2) and the fire hole (3) are made of corundum-mullite materials.
3. The refractory masonry structure for a shaft furnace hot blast stove according to claim 2, characterized in that: the masonry slurry is phosphate mullite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221079624.3U CN217844739U (en) | 2022-05-07 | 2022-05-07 | Refractory masonry structure of shaft furnace hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221079624.3U CN217844739U (en) | 2022-05-07 | 2022-05-07 | Refractory masonry structure of shaft furnace hot-blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217844739U true CN217844739U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221079624.3U Active CN217844739U (en) | 2022-05-07 | 2022-05-07 | Refractory masonry structure of shaft furnace hot-blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217844739U (en) |
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2022
- 2022-05-07 CN CN202221079624.3U patent/CN217844739U/en active Active
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