CN111172350A - Converter material throwing fast repairing method - Google Patents
Converter material throwing fast repairing method Download PDFInfo
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- CN111172350A CN111172350A CN202010038938.8A CN202010038938A CN111172350A CN 111172350 A CN111172350 A CN 111172350A CN 202010038938 A CN202010038938 A CN 202010038938A CN 111172350 A CN111172350 A CN 111172350A
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- converter
- furnace
- repairing
- hollow
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
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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 a converter throwing material quick repairing method, which adopts the main technical scheme that a fixed-point furnace repairing is carried out on a lining of a furnace body by utilizing bagged repairing materials.
Description
Technical Field
The invention belongs to the technical field of converter steelmaking, and particularly relates to a converter throwing fast repairing method.
Background
When the furnace body of the existing converter is maintained, the weak position of the middle lower part of the furnace body is usually carried out in a spray repair or pouring mode, but the production organization needs to be adjusted when the method is adopted to process a small hollow part, the open fettling time is about 50-60 minutes, wherein the fettling operation is about 30 minutes, the fettling time after fettling is about 20-30 minutes, and simultaneously, because the fettling material amount is large, at least 1 ton of fettling material is used for fettling each time.
The traditional fettling mode has the following problems: a large amount of repairing materials are poured no matter the size of the depression, the depression is filled and leveled by using a furnace swinging method, but the spreading is uneven, so that the height of the furnace lining is uneven, the shape of the furnace lining of the converter is damaged, and the stable operation of the converter is difficult; in addition, due to the fact that the condition of uneven material thickness exists in part of fettling areas, the problem of poor sintering possibly exists in an excessively thick place, the fettling material is prone to collapsing caused by excessively thick local fettling material, hidden dangers are brought to production safety, fettling effect is affected, a large amount of fettling material is wasted, production time is occupied, and working efficiency is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a converter material throwing quick-repairing method which is simple to operate, convenient to execute and good in using effect.
The method comprises the steps of measuring by using a furnace body thickness gauge with laser as a carrier, reflecting the laser when the laser is shot into a furnace body, receiving the laser reflection wave through the instrument, comparing the laser reflection wave with furnace body data recorded in advance, confirming the thickness value of each part of the furnace body, summarizing the data and displaying the data to an operator in the form of pictures, periodically and comprehensively measuring for about 30 minutes each time, obtaining the data of the whole furnace body, forming a database for reference, comprehensively judging the weak point in the furnace body, and supplementing the furnace by adopting the method disclosed by the invention when the depth of the hollow part is more than 20 cm; if the size of the hollow part is less than 20cm, furnace supplement is not needed.
The invention adopts cheap plastic woven bags, when each bag is filled with 5kg, the bag is thrown into a pot hole of a converter lining, so that the materials can be melted and combusted at high temperature, the filled repairing materials just fall into the pot hole when being scattered, when the repairing materials fall onto the converter lining, a part of the materials are continuously flushed out under the action of inertia and bulk material characteristics, and are quickly decelerated and fixed after meeting slag adhered to the converter lining, so that the repairing of the bagged materials is finished, and the repairing materials at the pot hole are quickly sintered after being roasted for 5-10 minutes under the action of high temperature in the converter.
The converter is a water container for steelmaking and steelmaking.
The technical scheme of the invention
A converter material throwing fast repairing method comprises the following specific steps:
step 1) detecting the whole furnace body data of the converter without hollow areas by using a furnace body thickness gauge;
step 2) detecting the used converter data by using a furnace body thickness gauge, comparing the converter data with the data in the step 1), determining the depth of the hollow part of the converter, determining furnace repairing when the depth of the hollow part is more than 20cm, and recording the position of the hollow part;
step 3) confirming the position of a to-be-supplemented furnace lining hollow spot from the position of a furnace opening according to data measured by a furnace body thickness gauge, and transferring the to-be-supplemented furnace lining hollow spot to the bottom;
and 4) putting the bagged repairing mass into the pot hole in the furnace to fill and level the pot hole, baking for 5-10 minutes under the action of high temperature of more than 1000 ℃ in the furnace, and performing subsequent smelting.
The repairing mass is a high-temperature repairing mass commonly used in a commercial steel mill.
According to the invention, the furnace body thickness gauge is preferably a converter laser thickness gauge.
According to the invention, the step 1) for determining the depth of the converter hollow is preferably to subtract the thickness data of the converter body of the hollow at the same position detected in the step 2) from the thickness data of the converter body in the step 1).
According to the present invention, the charge amount of the bagged mending material in the step 4) is preferably 5 kg/bag.
The high temperature of more than 1000 ℃ in the furnace in the step 4) is generated by smelting molten steel, and after the molten steel is poured out, the residual temperature in the furnace is maintained.
As the converter lining is very large, taking a 120-ton converter as an example, the converter has the advantages of about 9 meters in height, about 5 meters in diameter, about 125M of cylindrical ball type internal volume3In contrast, the pothole does not need too high precision, and the pothole is basically level with the periphery after being filled, so that the feeding is considered to be finished.
The invention has the advantages of
1. The furnace repairing method avoids the phenomenon that the conventional furnace repairing method changes the 'universal care' of the furnace lining, namely the excessive feeding furnace repairing, into the 'fixed point' furnace repairing, and has the advantages of short time, quick response, strong flexibility, good pertinence, less added materials, difficult collapse after sintering, high stability, effective cost reduction and the like.
2. The fettling method can rapidly fill the hollow parts of the lining of the furnace body in a short time (generally not more than 1/2 of the normal fettling time) by using the least fettling material, avoid deepening and expanding the hollow parts, effectively avoid deterioration of weak points of the hollow parts, and better maintain the shape of the lining of the furnace body.
Detailed Description
The invention is explained in more detail below with reference to examples, without limiting the scope of protection.
Converter: a water container for smelting steel and making steel.
Bagging repairing materials: 5 kg/bag, wherein the bag is a common commercially available plastic woven bag; the furnace burden is bulk high-temperature repairing burden commonly used in a steel mill in the market; the high-temperature repairing mass manufacturer is Anshan city and Feng refractory company, and the product name is as follows: repairing mass of converter.
Forklift (2 ton load): used for lifting the bagged repairing mass.
Example 1
A method for quickly supplementing the thrown material of converter, for example, 120-ton converter in mountain-steel group-type steel-making plant
The specific operation steps are as follows:
step 1), determining the size of the depression by using a converter laser thickness gauge: determining three adjacent hollow parts with the depths of 28cm, 31cm and 37cm respectively, and determining furnace repairing;
step 2) conveying the bagged repairing materials to the front of the converter by using a forklift, and unloading the bagged repairing materials to an appointed position;
step 3) tilting the converter to an angle of 90 degrees (the furnace mouth faces upwards to be 0 degree, the furnace front is generally 90 degrees, the furnace rear is-90 degrees, and the angle can be adjusted according to the situation), and visually confirming that the depression of the furnace lining to be supplemented is rotated to the bottom from the position of the furnace mouth according to the data measured by the converter laser thickness gauge;
step 4), 5kg of bag mending material is put into the pit to be mended in the furnace in the step 3), 4 bags of mending material are put into the pit to fill and level the pit with the pit depth of 28 cm;
step 5) after the hollow points are completely filled, filling another two positions, adjusting the inclination angle of the converter, adjusting the angle to be 10 degrees, conveniently throwing bagged repairing materials, throwing 5 bags of repairing materials to fill the hollow points with the depth of 31cm, throwing 7 bags of repairing materials to fill the hollow points with the depth of 37cm, keeping the inclination angle of the converter unchanged, baking for 10 minutes by utilizing high temperature in the converter, finishing a furnace repairing period and starting smelting; the whole fettling period is 25 minutes, and 16 bags of fettling material are used in total, namely 80kg fettling material.
And 6) transporting the residual bagged repairing materials in the ton bags to a storage position by using a forklift.
Example 2
A method for quickly supplementing the thrown material of converter, for example, 120-ton converter in mountain-steel group-type steel-making plant
The specific operation steps are as follows:
step 1), determining the size of the depression by using a converter laser thickness gauge: determining a depression part with the depth of 33cm, and determining furnace repairing;
step 2) conveying the bagged repairing materials to the front of the converter by using a forklift, and unloading the bagged repairing materials to an appointed position;
step 3) tilting the converter to an angle of 90 degrees (the furnace mouth faces upwards to be 0 degree, the furnace front is generally 90 degrees, the furnace rear is 270 degrees, and the angle can be adjusted according to conditions), and visually confirming that the depression of the furnace lining to be supplemented is rotated to the bottom from the position of the furnace mouth according to data measured by a converter laser thickness gauge;
step 4), 5kg of bag-mending material is put into the pot hole to be mended in the furnace in the step 3), 6 bags of mending material are put into the pot hole to fill and level the pot hole with the depth of 33 cm; keeping the inclination angle of the converter unchanged, baking for 10 minutes by utilizing the high temperature in the converter to finish a fettling period, and starting smelting; the whole fettling period is 17 minutes, and 6 bags of fettling material are used, namely 30kg of fettling material.
And 5) transporting the residual bagged repairing materials in the ton bags to a storage position by using a forklift.
Comparative example 1
When the traditional repairing method is used for repairing, the furnace is repaired by adopting a material pouring mode, and the specific operation steps are as follows:
(1) determining the size of the depression according to the measurement data of the converter laser thickness gauge: determining three adjacent hollow parts with the depths of 23cm, 27cm and 35cm respectively, and determining furnace repairing;
(2) the method comprises the following steps of (1) hanging a waste steel bucket by a traveling crane, dropping the waste steel bucket to a converter operation platform, conveying 1 ton of repairing material into the waste steel bucket by a forklift, swinging a converter mouth to 45 degrees, hanging the waste steel bucket by the traveling crane, pouring the repairing material into the converter from the converter mouth, swinging the converter to a 110-degree position when a hollow position is in front of the converter, allowing the material to be repaired to flow to the hollow position under the influence of gravity, swinging the converter to 90 degrees after the hollow position is completely filled, and baking for 30 minutes; after sintering, smelting can be started, the whole fettling period is 58 minutes, and 1 ton of fettling material is used.
Analysis of results
Compared with the traditional method, the converter throwing fast supplement method shortens the time of supplementing the converter by more than half, and the supplemented material after sintering is not easy to collapse and has good stability; the usage amount of the repairing mass can be reduced to 1/5 of the original usage amount obviously; fixed-point furnace repairing can be realized, and pertinence is strong; the pot-shaped furnace body lining pot-hole can be filled quickly, and the flexibility is good; effectively avoids the deterioration of weak points and better maintains the shape of the furnace body lining.
Claims (4)
1. A converter material throwing fast repairing method is characterized by comprising the following specific steps:
step 1) detecting the whole furnace body data of the converter without hollow areas by using a furnace body thickness gauge;
step 2) detecting the used converter data by using a furnace body thickness gauge, comparing the converter data with the data in the step 1), determining the depth of the hollow part of the converter, determining furnace repairing when the depth of the hollow part is more than 20cm, and recording the position of the hollow part;
step 3) confirming the position of a to-be-supplemented furnace lining hollow spot from the position of a furnace opening according to data measured by a furnace body thickness gauge, and transferring the to-be-supplemented furnace lining hollow spot to the bottom;
and 4) putting the bagged repairing mass into the pot hole in the furnace to fill and level the pot hole, baking for 5-10 minutes under the action of high temperature of more than 1000 ℃ in the furnace, and performing subsequent smelting.
2. The converter throwing quick repairing method according to claim 1, wherein the furnace body thickness gauge is a converter laser thickness gauge.
3. The method for quickly supplementing thrown material to a converter according to claim 1, wherein the step 1) of determining the depth of the converter hollow is to subtract the thickness data of the converter body in the step 1) of the converter body from the thickness data of the converter body in the hollow at the same position detected in the step 2).
4. The converter throwing material fast repairing method according to claim 1, wherein the charge amount of the bagged repairing mass in the step 4) is 5 kg/bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038938.8A CN111172350A (en) | 2020-01-14 | 2020-01-14 | Converter material throwing fast repairing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038938.8A CN111172350A (en) | 2020-01-14 | 2020-01-14 | Converter material throwing fast repairing method |
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| CN111172350A true CN111172350A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010038938.8A Pending CN111172350A (en) | 2020-01-14 | 2020-01-14 | Converter material throwing fast repairing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115679033A (en) * | 2022-11-03 | 2023-02-03 | 石横特钢集团有限公司 | Method for repairing inner wall of trunnion part of converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514896A (en) * | 2008-09-02 | 2009-08-26 | 中冶华天工程技术有限公司 | Convertor lining thickness online testing method and device thereof |
| CN103397138A (en) * | 2013-08-08 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Patching method for furnace lining of revolving furnace steel tapping hole part |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
-
2020
- 2020-01-14 CN CN202010038938.8A patent/CN111172350A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514896A (en) * | 2008-09-02 | 2009-08-26 | 中冶华天工程技术有限公司 | Convertor lining thickness online testing method and device thereof |
| CN103397138A (en) * | 2013-08-08 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Patching method for furnace lining of revolving furnace steel tapping hole part |
| CN107828933A (en) * | 2017-10-31 | 2018-03-23 | 日照钢铁控股集团有限公司 | The method for controlling convertor lining thickness |
Non-Patent Citations (1)
| Title |
|---|
| 于春强等: "激光测厚仪在宣钢150t转炉上的应用实践", 《2013钢铁用耐火材料生产、研发和应用技术交流会论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115679033A (en) * | 2022-11-03 | 2023-02-03 | 石横特钢集团有限公司 | Method for repairing inner wall of trunnion part of converter |
| CN115679033B (en) * | 2022-11-03 | 2023-06-16 | 石横特钢集团有限公司 | Repair method for inner wall of trunnion part of converter |
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Application publication date: 20200519 |