CN113388705A - Blast furnace taphole cooling wall burning loss treatment method - Google Patents
Blast furnace taphole cooling wall burning loss treatment method Download PDFInfo
- Publication number
- CN113388705A CN113388705A CN202110538045.4A CN202110538045A CN113388705A CN 113388705 A CN113388705 A CN 113388705A CN 202110538045 A CN202110538045 A CN 202110538045A CN 113388705 A CN113388705 A CN 113388705A
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- CN
- China
- Prior art keywords
- taphole
- frame
- blast furnace
- taphole frame
- cooling wall
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 239000011449 brick Substances 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000013016 damping Methods 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 15
- 239000000498 cooling water Substances 0.000 abstract description 10
- 230000008595 infiltration Effects 0.000 abstract description 4
- 238000001764 infiltration Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000010079 rubber tapping Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to the technical field of metallurgical equipment, in particular to a method for treating burning loss of a blast furnace taphole cooling wall, which comprises the steps of utilizing long-term blast furnace damping down, dismantling a taphole frame, dismantling refractory materials in the taphole frame, finding out a specific iron infiltration part, cleaning iron slag, cleaning a cooling water pipe without burning loss, burning a small amount of parent body of the cooling wall, tamping the burning loss part and the iron infiltration part of the cooling wall parent body by adopting refractory materials of corresponding materials, repairing the cooling water pipe by surfacing if the local part of the cooling water pipe is burnt, pouring the refractory materials for pouring if the burning loss of the water pipe is serious, tamping the corresponding refractory materials for treating, then installing the taphole frame, and pouring and integrally pouring between the taphole frame and carbon bricks.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a method for treating burning loss of a blast furnace taphole cooling wall.
Background
The hearth is the most important part of the blast furnace, the working of the hearth is directly related to the first-generation furnace life of the blast furnace, and the taphole is the most key part in the hearth, but due to construction quality and daily operation reasons, the burning loss condition of the taphole cooling wall occurs, the yield and index of the blast furnace are seriously influenced, and the blast furnace is stopped in serious cases. The reason for the burning loss of the taphole cooling wall is as follows: firstly, blast furnace body situation is relatively poor, and cooling arrangement and wind gap damage are frequent, and the blast furnace leaks for a long time and leads to the charcoal to smash the layer loose, appears the gap. Secondly, in the process of blocking the opening in the tapping operation of the blast furnace, the taphole part is subjected to mechanical impact of a mud gun for a long time, so that refractory materials in the taphole frame are loosened and gaps appear. Molten iron flows down along the gap between the iron notch combined brick and the carbon brick, burns and damages the lower part of the iron notch frame, and directly contacts the cooling wall below the iron notch frame to burn and damage the cooling wall.
The burning loss of the taphole cooling wall, the water cut-off treatment of the burning loss cooling water pipe, the cooling intensity of the taphole part is reduced, the taphole stops tapping for ensuring the safe operation of the hearth, the tuyere above the northern iron is blocked, the activity degree of the hearth at the position is reduced, the smelting intensity is controlled, the output and the economic index of the blast furnace are influenced, the erosion of carbon bricks in the furnace at the later stage of the furnace service seriously leads to the overhaul of the furnace, the taphole tapping or the furnace blowing-out treatment burning loss cooling wall is stopped at the earlier stage in the furnace service, the first-generation furnace service of the blast furnace is influenced, and great potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a method for treating the burning loss of a blast furnace taphole cooling wall, which is suitable for the iron leakage of a blast furnace taphole channel or the burning loss of an external main channel iron leakage cooling wall, the taphole frame is dismantled by utilizing overhaul, the damaged cooling wall is repaired, the iron leakage part adopts the ramming pouring treatment of refractory materials with the same material, the taphole frame is reinstalled, the refractory materials in the taphole frame are poured again, and the service life of a furnace hearth is further effectively prolonged.
In order to solve the technical problem, the invention provides a blast furnace taphole cooling wall burning loss treatment method, wherein the blast furnace comprises a taphole, a taphole frame, a furnace shell, a cooling wall, carbon bricks and castable, and the blast furnace taphole cooling wall burning loss treatment method comprises the following steps:
s1, after damping down, dismantling the taphole frame;
s2, cleaning the iron notch frame and the carbon bricks;
s3, overlaying the burned part of the cooling wall;
s4, ramming the lower part of the taphole frame by adopting a castable;
s5, reinstalling the taphole frame;
s6, integral casting;
s6.1, adopting pouring materials to integrally pour the iron notch frame and the carbon bricks;
s6.2, pre-embedding a steel pipe in the taphole channel to reserve the taphole channel, and grouting the taphole frame after pouring to further block gaps;
s7, blowing air to produce after construction is finished, and temporarily stopping tapping at the taphole;
s8, after twenty-four hours of pouring, baking by using coke oven gas, and simultaneously opening exhaust holes in the upper part of the taphole frame for exhausting;
s9, the iron notch is recovered to be cast after one week.
Further, the step S1 includes the following steps:
s1.1, before damping down, removing the main runner and the outer mold of the main runner of the taphole, damping down the blast furnace, and after igniting the furnace top, removing the taphole frame;
s1.2, hanging the taphole frame above the taphole frame when the taphole frame is disassembled, and cutting the welded part of the taphole frame and the furnace shell by gas welding;
s1.3, dismantling the fixing bolts for connecting the periphery of the taphole frame and the furnace shell;
s1.4, slowly pulling out the taphole frame.
Further, the step S2 includes the following steps:
s2.1, cleaning the taphole frame and the castable in the taphole frame;
s2.2, cleaning up accumulated slag and accumulated iron between the taphole frame and the carbon bricks.
Further, the step S5 includes the following steps:
s5.1, hanging the taphole frame above the taphole frame, and slowly knocking the taphole in by using a sledge hammer until the taphole frame is installed in place;
s5.2, fastening bolts around the taphole frame;
and S5.3, welding the periphery of the taphole frame with the furnace shell.
The invention has the beneficial effects that: the method is simple, the burning loss of the taphole cooling wall is repaired, and the service life of the furnace hearth is effectively prolonged, the method comprises the steps of utilizing the blast furnace to blow down for a long time, removing the taphole frame 2, removing the refractory material in the taphole frame 2, finding out a specific iron infiltration part, cleaning iron slag, enabling a cooling water pipe not to be burnt, enabling a small amount of parent bodies of the cooling wall 4 to be burnt, tamping the burnt part of the parent bodies of the cooling wall 4 and the iron infiltration part by adopting the refractory material of corresponding materials, repairing the cooling water pipe by overlaying welding if the local small amount of burning loss of the cooling water pipe is serious, adopting the refractory material to pour, then using the corresponding refractory material to stamp, installing the taphole frame 2, and pouring and integrally pouring between the taphole frame 2 and the carbon brick 5.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1. tapping; 2. a taphole frame; 3. a furnace shell; 4. a stave; 5. carbon bricks; 6. and (5) pouring a material.
Detailed Description
As shown in fig. 1, the blast furnace of the present invention includes a taphole 1, a taphole frame 2, a furnace shell 3, a cooling wall 4, carbon bricks 5 and castable 6, and a method for treating the burning loss of the cooling wall of the taphole of the blast furnace includes the following steps:
s1, after damping down, dismantling the taphole frame 2;
s2, cleaning the space between the inside of the taphole frame 2 and the carbon bricks 5;
s3, overlaying the burnt part of the cooling wall 4;
s4, ramming the lower part of the taphole frame 2 by adopting a castable 6;
s5, reinstalling the taphole frame 2;
s6, integral casting;
s6.1, adopting a pouring material 6 to perform integral pouring treatment between the interior of the taphole frame 2 and the carbon brick 5;
s6.2, pre-burying a steel pipe in the taphole channel to reserve the taphole channel, and grouting in the taphole frame 2 after pouring to further block gaps;
s7, blowing air to produce after construction is finished, and temporarily stopping tapping of the taphole 1;
s8, after twenty-four hours of pouring, baking by using coke oven gas, and simultaneously opening exhaust holes in the upper part of the taphole frame 2 for exhausting;
s9, the iron notch is recovered to be cast after one week.
Further, the step S1 includes the following steps:
s1.1, before damping down, the main runner and the outer mold of the main runner are removed, the blast furnace is damped down, and after the furnace top is ignited, the taphole frame 2 is removed;
s1.2, hanging the taphole frame 2 above the taphole frame 2 when the taphole frame 2 is disassembled, and cutting the welding part of the taphole frame 2 and the furnace shell 3 by gas welding;
s1.3, dismantling the fixing bolts for connecting the periphery of the taphole frame 2 and the furnace shell 3;
s1.4, slowly pulling out the taphole frame.
Further, the step S2 includes the following steps:
s2.1, cleaning the taphole frame 2 and the castable 6 in the taphole frame 2;
s2.2, cleaning up the accumulated slag and accumulated iron between the taphole frame 2 and the carbon brick 5.
Further, the step S5 includes the following steps:
s5.1, hanging the taphole frame 2 above the taphole frame 2, and slowly knocking in the taphole by a sledge hammer until the taphole is installed in place;
s5.2, fastening bolts around the taphole frame 2;
s5.3, welding the periphery of the taphole frame 2 with the furnace shell 3.
The method is mainly suitable for iron leakage of the taphole channel, burning loss of the wall of the taphole frame 2 or iron leakage of a main channel of a blast furnace to cool 4, utilizing long-term blast furnace blowing-down to remove the taphole frame 2, removing refractory materials in the taphole frame 2, finding out a specific iron-seeping part, cleaning iron slag, not burning loss of a cooling water pipe, burning loss of a small amount of parent materials of the cooling wall 4, tamping the matrix burning loss part and the iron-seeping part of the cooling wall 4 by using refractory materials of corresponding materials, such as local small amount of burning loss of the cooling water pipe, repairing the cooling water pipe by overlaying welding, pouring the refractory materials if the burning loss of the water pipe is serious, tamping the corresponding refractory materials, and then installing the taphole frame 2, and pouring the whole pouring treatment between the taphole frame 2 and the carbon bricks 5.
Claims (4)
1. The utility model provides a blast furnace taphole cooling wall burning loss processing method, the blast furnace includes taphole (1), taphole frame (2), stove outer covering (3), stave (4), carbon brick (5) and castable (6), its characterized in that: the method comprises the following steps:
s1, after damping down, dismantling the taphole frame (2);
s2, cleaning the iron notch frame (2) and the carbon bricks (5);
s3, overlaying the burnt part of the cooling wall (4);
s4, ramming the lower part of the taphole frame (2) by adopting a castable (6);
s5, reinstalling the taphole frame (2);
s6, integral casting;
s6.1, integrally pouring the casting material (6) between the interior of the taphole frame (2) and the carbon brick (5);
s6.2, pre-burying a steel pipe in the taphole channel to reserve the taphole channel, and grouting in the taphole frame (2) after pouring to further block gaps;
s7, blowing air for production after construction is finished, wherein the taphole (1) is temporarily not tapped;
s8, after twenty-four hours of pouring, baking by using coke oven gas, and simultaneously opening exhaust holes in the upper part of the taphole frame (2) for exhausting;
s9, the iron notch is recovered to be cast after one week.
2. The method for treating the burning loss of the cooling wall of the blast furnace taphole according to claim 1, characterized in that: the step S1 includes the following steps:
s1.1, before damping down, the outer mold of the main channel and the main channel of the taphole are removed, the blast furnace is damped down, and after the furnace top is ignited, the taphole frame (2) is removed;
s1.2, hanging the taphole frame (2) above the taphole frame (2) when the taphole frame (2) is disassembled, and cutting the welding part of the taphole frame (2) and the furnace shell (3) by gas welding;
s1.3, dismantling the fixing bolts connecting the periphery of the taphole frame (2) and the furnace shell (3);
s1.4, slowly pulling out the taphole frame.
3. The method for treating the burning loss of the cooling wall of the blast furnace taphole according to claim 1, characterized in that: the step S2 includes the following steps:
s2.1, cleaning the taphole frame (2) and the castable (6) in the taphole frame (2);
s2.2, cleaning up accumulated slag and accumulated iron between the taphole frame (2) and the carbon brick (5).
4. The method for treating the burning loss of the cooling wall of the blast furnace taphole according to claim 1, characterized in that: the step S5 includes the following steps:
s5.1, hanging the taphole frame (2) above the taphole frame (2), and slowly knocking the taphole in by a sledge hammer until the taphole is installed in place;
s5.2, fastening bolts around the taphole frame (2);
s5.3, welding the periphery of the taphole frame (2) with the furnace shell (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538045.4A CN113388705A (en) | 2021-05-18 | 2021-05-18 | Blast furnace taphole cooling wall burning loss treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110538045.4A CN113388705A (en) | 2021-05-18 | 2021-05-18 | Blast furnace taphole cooling wall burning loss treatment method |
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| Publication Number | Publication Date |
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| CN113388705A true CN113388705A (en) | 2021-09-14 |
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| CN202110538045.4A Pending CN113388705A (en) | 2021-05-18 | 2021-05-18 | Blast furnace taphole cooling wall burning loss treatment method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912051A (en) * | 2012-10-26 | 2013-02-06 | 莱芜钢铁集团有限公司 | Method for exchanging cooling wall of blast furnace taphole online |
| JP2013036052A (en) * | 2011-08-03 | 2013-02-21 | Jfe Steel Corp | Method for repairing damaged part of blast furnace body |
| CN108342532A (en) * | 2018-05-02 | 2018-07-31 | 安徽马钢设备检修有限公司 | A kind of device and its replacing options for not destroying furnace shell and replacing blast furnace cooling stave |
-
2021
- 2021-05-18 CN CN202110538045.4A patent/CN113388705A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013036052A (en) * | 2011-08-03 | 2013-02-21 | Jfe Steel Corp | Method for repairing damaged part of blast furnace body |
| CN102912051A (en) * | 2012-10-26 | 2013-02-06 | 莱芜钢铁集团有限公司 | Method for exchanging cooling wall of blast furnace taphole online |
| CN108342532A (en) * | 2018-05-02 | 2018-07-31 | 安徽马钢设备检修有限公司 | A kind of device and its replacing options for not destroying furnace shell and replacing blast furnace cooling stave |
Non-Patent Citations (2)
| Title |
|---|
| 李汉祥: "高炉冷却壁更换新技术应用", 《武钢技术》 * |
| 胡海波等: "酒钢7号高炉冷却壁破损后的修复", 《炼铁》 * |
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Application publication date: 20210914 |