CN102199678A - Method for quickly dismantling steel bricks of furnace throat of blast furnace - Google Patents
Method for quickly dismantling steel bricks of furnace throat of blast furnace Download PDFInfo
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- CN102199678A CN102199678A CN 201110116399 CN201110116399A CN102199678A CN 102199678 A CN102199678 A CN 102199678A CN 201110116399 CN201110116399 CN 201110116399 CN 201110116399 A CN201110116399 A CN 201110116399A CN 102199678 A CN102199678 A CN 102199678A
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- throat
- furnace
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- furnace shell
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Abstract
The invention discloses a method for quickly dismantling steel bricks of the furnace throat of a blast furnace, which comprises the following steps: 1) cutting off furnace throat steel brick fixing bolts; 2) fixedly mounting a supporting device on the outer wall of the furnace shell; 3) mounting a jack; and 4) ejecting the bolts out. The method has the advantages that: the furnace throat steel brick fixing bolts are pushed into the furnace shell from the outside of the furnace shell directly, the furnace throat steel bricks, under the influence of gravity, fall onto the bottom of the blast furnace directly, operators are not required to enter the furnace in the whole operation process, and thus, the efficiency of the dismantling of the steel bricks of the furnace throat of the blast furnace can be improved considerably; and taking the dismantling of 20 furnace throat steel bricks. For example, the dismantling of each furnace throat brick from the cutting of the bolts to the falling of the furnace throat steel brick requires only 40 minutes, and the dismantling of the 20 furnace throat steel bricks requires only about 14 hours, so the dismantling efficiency is improved effectively; and in the whole dismantling process, operators are not required to enter the furnace, so the safety risks of the operators are reduced.
Description
Technical field
The present invention relates to a kind of blast furnace quick maintenance method, particularly a kind of method of fast Demolition blast furnace throat steel brick.
Background technology
Throat armour is positioned at blast furnace stack top, and the present position is that furnace charge enters collision place in the stove.Refractory materials is adjacent in bottom and the stove, because temperature of living in is at 150 ~ 300 ℃, environment for use is abominable, has big thermal stresses, is easy to generate crackle, adds the friction of decline furnace charge and washing away of rising coal gas stream, damages very serious.Under the normal smelting state, just needed blowing out to change once in about 3 years.Throat armour generally adopts two-part, and impact that lower part is subjected to and wearing and tearing are bigger, and therefore the frequency of changing is often very high.General throat armour height overall is about 2 meters, and lower part height is in 800 millimeter.Throat armour is that four bolting by four jiaos are installed on the furnace shell, existing replacing method is that operator enter four standing bolts of dismounting in the State of Blast Furnace, not only efficient is low, the replacing time is long, and security risk is bigger, cause the blast furnace production capacity to reduce on the one hand, also be unfavorable for operator's Occupational health.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of fast Demolition blast furnace throat steel brick, and it can effectively improve throat armour and change efficient, the shortening time, improve the blast furnace production capacity, and can also avoid jeopardizing operator's personnel safety.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method of fast Demolition blast furnace throat steel brick may further comprise the steps:
1) cuts off the throat armour standing bolt; Cut off from the last furnace shell outside and to be used for throat armour is fixedly mounted on four bolts on the furnace shell;
2) fixedly mounting bracing or strutting arrangement on the furnace shell outer wall: corresponding cut bolt position fixed installation U-shaped support on the furnace shell outer wall; Described U-shaped support level is provided with;
3) screw block is installed; The screw block level is installed in described U-shaped support lateral part; The axis of described screw block push rod and the dead in line of described bolt; Described screw block bottom is slidingly matched with U-shaped support lateral part; The quantity of described screw block is identical with the quantity of described bolt;
4) liftout bolt: handle four screw block simultaneously described bolt is promoted in stove, described bolt is cut off when end inwardly breaks away from furnace shell and stops to promote, and four standing bolts of described throat armour all break away from furnace shell, and throat armour directly drops.
At first remove two relative rectangles throat armour that heals up in the described throat armour demolishing process, remove other throat armours then successively again.
The described shared U-shaped support of two bolts that is positioned on the same horizontal plane.
Described U type support comprises the channel-section steel of arranged transversely and vertically is welded on the steel plate at channel-section steel two ends.
Adopt the beneficial effect that technique scheme produced to be: directly the throat armour standing bolt to be pushed furnace shell from the furnace shell outside, throat armour can be subjected to influence of gravity directly to fall to the blast furnace bottom, the entire operation process need not operator and enters in the stove, improve throat armour to a great extent and remove efficient, removing with 20 throat armours is example, the dismounting of every throat armour begins to drop only 40 minutes time of need to throat armour from cutting off bolt, all torn 20 throat armours open and only needed about 14 hours, effectively improved and remove efficient; Whole demolishing process need not operator and enters in the stove reduction operator safety risk simultaneously.
Description of drawings
Fig. 1 is a screw block of the present invention installation site synoptic diagram;
1, throat armour; 2, furnace shell; 3, screw block; 4, U-shaped support; Further the present invention is described in detail below in conjunction with accompanying drawing.
Embodiment
A kind of method of fast Demolition blast furnace throat steel brick may further comprise the steps:
1) cut off throat armour 1) standing bolt; Cut off from last furnace shell 2 outsides and to be used for throat armour 1 is fixedly mounted on four bolts on the furnace shell 2;
2) fixedly mounting bracing or strutting arrangement on furnace shell 2 outer walls: corresponding cut bolt position fixed installation U-shaped support 4 on furnace shell 2 outer walls; Described U-shaped support 4 is horizontally disposed with;
3) screw block is installed; As shown in Figure 1, screw block 3 levels are installed in described U-shaped support 4 lateral parts; The axis of described screw block 3 push rods and the dead in line of described bolt; Described screw block 3 bottoms and U-shaped support 4 lateral parts are slidingly matched; The quantity of described screw block 3 is identical with the quantity of described bolt;
4) liftout bolt: handle four screw block 3 simultaneously described bolt is promoted in stove, described bolt is cut off when end inwardly breaks away from furnace shell 2 and stops to promote, and 1 four standing bolts of described throat armour all break away from furnace shell 2, and throat armour 1 directly drops.
At first remove two relative rectangles throat armour that heals up in described throat armour 1 demolishing process, remove other throat armours then successively again.
The described shared U-shaped support 4 of two bolts that is positioned on the same horizontal plane.
Described U-shaped support 4 comprises the channel-section steel of arranged transversely and vertically is welded on the steel plate at channel-section steel two ends.
In specific operation process, at first remove two orthogonal throat armour that heals up, removing other arc throat armours successively then, at first break from the neat undercut of furnace shell outer wall in the time of concrete operations and wait to remove four standing bolts of throat armour with gas cutting or other modes, throat armour still relies on bolt to make throat armour with the moment of flexure opposite with gravity direction that furnace shell produces after cutting off bolt, level is welded two U-shaped supports on the corresponding furnace shell outer wall of two rows bolt then, the lateral part of U-shaped support is a channel-section steel, the effect of being arranged to channel-section steel is to make things convenient for screw block laterally to slide, the channel-section steel opening direction is relative with the furnace shell outer wall when installing, and its two supporting leg is steel plate, and the open end of two block plates directly is welded on the furnace shell outer wall and gets final product; After having welded the U-shaped support screw jack is adjusted height, and the base of screw block is installed in the U-shaped support transverse channel steels, and the screw block that laterally slides, so that the axis of its push rod is respectively at the dead in line of bolt; Treat that after four screw block installation in position, the manual control screw block heads into bolt in the stove, after bolt was cut end disengaging furnace shell, throat armour fell to the blast furnace bottom naturally under action of gravity; So far, finish the dismounting of a throat armour; In demolishing process, need not operator and enter in the stove demounting bolt one by one, improve to a great extent and remove efficient, save time, improve the production capacity of blast furnace, can also guarantee operator's personnel safety.
Claims (4)
1. the method for a fast Demolition blast furnace throat steel brick may further comprise the steps:
1) cuts off throat armour (1) standing bolt; Cut off from last furnace shell (2) outside and to be used for throat armour (1) is fixedly mounted on four bolts on the furnace shell (2);
2) fixedly mounting bracing or strutting arrangement on furnace shell (2) outer wall: corresponding cut bolt position fixed installation U-shaped support (4) on furnace shell (2) outer wall; Described U-shaped support (4) is horizontally disposed with;
3) screw block is installed; Screw block (3) level is installed in described U-shaped support (4) lateral part; The axis of described screw block (3) push rod and the dead in line of described bolt; Described screw block (3) bottom is slidingly matched with U-shaped support (4) lateral part; The quantity of described screw block (3) is identical with the quantity of described bolt;
4) liftout bolt: handle four screw block (3) simultaneously described bolt is promoted in stove, described bolt is cut off when end inwardly breaks away from furnace shell (2) and stops to promote, (1) four standing bolt of described throat armour all breaks away from furnace shell (2), and throat armour (1) directly drops.
2. the method for a kind of fast Demolition blast furnace throat steel brick according to claim 1 is characterized in that: at first remove two relative rectangles throat armour that heals up in described throat armour (1) demolishing process, remove other throat armours then successively again.
3. the method for a kind of fast Demolition blast furnace throat steel brick according to claim 2 is characterized in that: the described shared U-shaped supports of two bolts (4) that are positioned on the same horizontal plane.
4. the method for a kind of fast Demolition blast furnace throat steel brick according to claim 3 is characterized in that: described U-shaped support (4) comprises the channel-section steel of arranged transversely and vertically is welded on the steel plate at channel-section steel two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116399 CN102199678B (en) | 2011-05-06 | 2011-05-06 | Method for quickly dismantling steel bricks of furnace throat of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110116399 CN102199678B (en) | 2011-05-06 | 2011-05-06 | Method for quickly dismantling steel bricks of furnace throat of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102199678A true CN102199678A (en) | 2011-09-28 |
| CN102199678B CN102199678B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110116399 Active CN102199678B (en) | 2011-05-06 | 2011-05-06 | Method for quickly dismantling steel bricks of furnace throat of blast furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832274A (en) * | 2021-09-17 | 2021-12-24 | 胡俊峰 | Blast furnace throat prefabricated part |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11189815A (en) * | 1997-12-24 | 1999-07-13 | Nkk Corp | Working method of exchanging of stave in blast furnace |
| CN201217663Y (en) * | 2008-05-23 | 2009-04-08 | 宝山钢铁股份有限公司 | Blast furnace throat steel brick |
| JP2010180022A (en) * | 2009-02-05 | 2010-08-19 | Nippon Steel Corp | Method of setting sole plate, and load monitor |
| CN101818222A (en) * | 2010-04-28 | 2010-09-01 | 北京首钢建设集团有限公司 | Construction method for replacing blast furnace shell shroud by 'furnace body suspension method' |
-
2011
- 2011-05-06 CN CN 201110116399 patent/CN102199678B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11189815A (en) * | 1997-12-24 | 1999-07-13 | Nkk Corp | Working method of exchanging of stave in blast furnace |
| CN201217663Y (en) * | 2008-05-23 | 2009-04-08 | 宝山钢铁股份有限公司 | Blast furnace throat steel brick |
| JP2010180022A (en) * | 2009-02-05 | 2010-08-19 | Nippon Steel Corp | Method of setting sole plate, and load monitor |
| CN101818222A (en) * | 2010-04-28 | 2010-09-01 | 北京首钢建设集团有限公司 | Construction method for replacing blast furnace shell shroud by 'furnace body suspension method' |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832274A (en) * | 2021-09-17 | 2021-12-24 | 胡俊峰 | Blast furnace throat prefabricated part |
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| Publication number | Publication date |
|---|---|
| CN102199678B (en) | 2013-04-17 |
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