CN117587183A - Cooling wall of smelting reduction furnace - Google Patents
Cooling wall of smelting reduction furnace Download PDFInfo
- Publication number
- CN117587183A CN117587183A CN202311843043.1A CN202311843043A CN117587183A CN 117587183 A CN117587183 A CN 117587183A CN 202311843043 A CN202311843043 A CN 202311843043A CN 117587183 A CN117587183 A CN 117587183A
- Authority
- CN
- China
- Prior art keywords
- reduction furnace
- smelting reduction
- cooling wall
- slag
- cooling
- 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
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 44
- 238000001816 cooling Methods 0.000 title claims abstract description 43
- 239000002893 slag Substances 0.000 claims abstract description 46
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 10
- 239000003245 coal Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 36
- 229910052742 iron Inorganic materials 0.000 abstract description 18
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000006722 reduction reaction Methods 0.000 description 37
- 239000000843 powder Substances 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 235000013980 iron oxide Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention relates to the technical field of smelting reduction iron making, in particular to a cooling wall of a smelting reduction furnace. The slag hanging groove opening of the cooling wall of the smelting reduction furnace is obliquely upwards and forms an included angle of 30-60 degrees with the horizontal line, and the opening which is obliquely upwards is filled with splashed slag; the cooling wall of the smelting reduction furnace is provided with a cooling water channel which is S-shaped and is provided with a water inlet and a water outlet; the cooling wall of the melting reduction furnace is made of copper-steel composite, the hot surface and the slag hanging groove are made of copper, and the cold surface is made of steel. The cooling wall has high cooling strength and good cooling wall slag hanging effect, and reduces the heat taken away by cooling water.
Description
Technical Field
The invention relates to the technical field of smelting reduction iron making, in particular to a cooling wall of a smelting reduction furnace.
Background
The smelting reduction furnace directly adopts iron ore powder and coal powder for iron making, and the procedures of coking and sintering are omitted. The smelting reduction ironmaking directly sprays mineral powder and coal powder into a slag iron melting pool, reduction reaction occurs in the melting pool to generate CO, and the CO rising from the melting pool and the carrier gas of the mineral powder are sprayed to bring slag iron drops into an upper space to form 'fountain' -shaped slag iron drops; the rising CO gas and the hot air sprayed by the top hot air spray gun undergo secondary combustion reaction to generate a large amount of heat, and the slag iron drops in the 'fountain' -type slag iron drops are heated and then brought back to the molten pool. Slag drops entering the upper part are splashed on the furnace wall to form a slag shell to protect the furnace wall. Because of the film water-cooled wall of the melting reduction furnace which is arranged on the furnace wall, gaps are reserved among cooling water pipes, slag hanging effect is poor, heat taken away by cooling water is large, the temperature of a furnace shell outside the film water-cooled wall is high, and the film water-cooled wall can redly when serious.
The brick-inlaid grooves of the similar blast furnace cooling wall are dovetail grooves, and the opening direction of the brick-inlaid grooves is perpendicular to the cooling wall body, so that the problem of slag hanging of the cooling wall of the smelting reduction furnace cannot be solved.
Disclosure of Invention
Technical problem to be solved
The slag hanging effect is poor, and the heat taken away by cooling water is large.
Method for solving technical problems
In production, hot air is sprayed into a smelting reduction furnace through a hot air spray gun, mineral powder and coal powder are sprayed into a slag and molten iron molten pool through a mineral and coal spray gun, iron oxide in the mineral powder and carbon in the coal powder react in the molten pool to generate CO, part of slag and part of molten iron are brought into an upper space by rising CO air flow to form a slag fountain, CO is combusted in a secondary combustion zone to release a large amount of heat, the temperature of the secondary combustion zone reaches more than 1600 ℃, heated slag and molten iron fall back into the molten pool to heat the molten pool, and molten iron generated by reaction is discharged through a forehearth.
The cooling wall of the smelting reduction furnace is provided, an opening of a slag hanging groove of the cooling wall of the smelting reduction furnace is obliquely upwards, an included angle between the cooling wall and a horizontal line is 30-60 degrees, and splashed slag is filled in the obliquely upwards opening to form a stable slag shell. The cooling wall of the smelting reduction furnace is arranged on the inner side of the furnace shell of the smelting reduction furnace.
The cooling wall of the smelting reduction furnace is provided with a cooling water channel which is S-shaped and is provided with a water inlet and a water outlet, wherein the cooling wall is provided with one water inlet and one water outlet, and can also be provided with more than 2 water inlets and more than 2 water outlets.
The cooling wall of the melting reduction furnace is made of copper-steel composite materials, the hot surface and the slag hanging groove are made of copper, and the cold surface is made of steel.
The cooling wall of the smelting reduction furnace has the advantages of high cooling strength, stable slag hanging, good heat insulation effect, reduction of heat taken away by cooling water, effective prevention of redness of the furnace shell and reduction of heat loss.
Drawings
FIG. 1 shows a cooling wall of a smelting reduction furnace
FIG. 2 shows a smelting reduction furnace
FIG. 3 is a schematic view of a cooling wall water passage of a smelting reduction furnace
FIG. 4 is a schematic view of cooling wall-mounted slag of a smelting reduction furnace
Legend mark
1 a smelting reduction furnace, 2 a hot air spray gun, 3 ore and coal spray guns, 4 a cooling wall of the smelting reduction furnace, 5 a secondary combustion zone, 6 a slag fountain, 7 slag, 8 molten iron, 9 a cooling wall body of the smelting reduction furnace, 10 a water inlet pipe, 11 a water outlet pipe, 12 a slag hanging groove, 13 a slag hanging groove wall, 14 a cooling water channel, 15 a slag shell, 16 a forehearth and 17 a furnace shell
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following detailed description of the invention, with reference to the accompanying drawings, is provided so that those skilled in the art to which the invention pertains will readily implement the invention, and the invention may be embodied in many different forms and is not limited to this description.
In production, hot air is sprayed into a smelting reduction furnace 1 from a hot air spray gun 2, mineral powder and coal dust are sprayed into slag 7 and molten iron 8 through a mineral and coal spray gun 3, iron oxides in the mineral powder and carbon in the coal dust react in a molten pool to generate CO, ascending CO airflow brings part of slag 7 and part of molten iron 8 into an upper space to form a slag fountain 6, CO is combusted in a secondary combustion zone 5 to release a large amount of heat, the temperature of the secondary combustion zone 5 reaches over 1600 ℃, the heated slag 7 and molten iron 8 fall back into the molten pool to heat the molten pool, and molten iron 8 generated by the reaction is discharged through a forehearth 16. The slag drops of the slag fountain 6 are splashed into the slag hanging groove 12 of the cooling wall 4 of the smelting reduction furnace, the opening of the slag hanging groove of the cooling wall 4 of the smelting reduction furnace is inclined upwards, the included angle between the slag hanging groove and the horizontal line is 45 degrees, the slag hanging groove 12 which is inclined upwards is filled with slag, and slag shells 15 are solidified after cooling.
The cooling wall 4 of the smelting reduction furnace comprises a cooling wall body 9 of the smelting reduction furnace, a cooling water channel 14, a water inlet pipe 10, a water outlet pipe 11, a slag bath 12 and a slag bath wall 13.
The material of the cooling wall 4 of the melting reduction furnace is copper-steel composite material, the hot surface and the slag hanging groove are copper, the cold surface is steel, the copper plate and the steel plate are firstly composited together when the cooling wall 4 of the melting reduction furnace is manufactured, and then an S-shaped cooling water channel 14 is opened on the cold surface, wherein the cooling water channel penetrates into the copper for 10mm, and the width of the cooling water channel is 80mm, and the height of the cooling water channel is 30mm; after the cooling water channel 14 is opened, the cooling water channel is sealed by welding a steel plate, and then the water inlet and outlet pipes are installed. The specifications of each block of the cooling wall 4 of the smelting reduction furnace are mainly as follows: length x width: 1500 x 1000;1000×800;800 x 600, etc.
Fig. 2 shows a smelting reduction furnace in which a stave 4 is attached to the inside of a furnace shell 17. 10 to 28 cooling walls 4 of the smelting reduction furnace are arranged in the circumferential direction of the smelting reduction furnace 1, and 6 to 15 rows of cooling walls 4 of the smelting reduction furnace are vertically arranged.
Claims (3)
1. A stave for a smelting reduction furnace, which is installed inside the smelting reduction furnace, the smelting reduction furnace comprising: the furnace shell of the smelting reduction furnace, the hot air spray gun, the ore and coal spray gun, the cooling wall, the forehearth and the like are characterized in that the opening of a slag hanging groove of the cooling wall of the smelting reduction furnace is inclined upwards.
2. The cooling wall of a smelting reduction furnace according to claim 1, wherein the cooling water passage of the cooling wall of the smelting reduction furnace is S-shaped and is provided with a water inlet and a water outlet.
3. The cooling wall of the smelting reduction furnace according to claim 1, wherein the cooling wall of the smelting reduction furnace is made of copper-steel composite materials, the hot surface and the slag bath are made of copper, and the cold surface is made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311843043.1A CN117587183A (en) | 2023-12-29 | 2023-12-29 | Cooling wall of smelting reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311843043.1A CN117587183A (en) | 2023-12-29 | 2023-12-29 | Cooling wall of smelting reduction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117587183A true CN117587183A (en) | 2024-02-23 |
Family
ID=89911746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311843043.1A Pending CN117587183A (en) | 2023-12-29 | 2023-12-29 | Cooling wall of smelting reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117587183A (en) |
-
2023
- 2023-12-29 CN CN202311843043.1A patent/CN117587183A/en active Pending
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |