CN217393751U - Split type nozzle brick cup structure of ladle that can hot repair changed - Google Patents
Split type nozzle brick cup structure of ladle that can hot repair changed Download PDFInfo
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- CN217393751U CN217393751U CN202220544034.7U CN202220544034U CN217393751U CN 217393751 U CN217393751 U CN 217393751U CN 202220544034 U CN202220544034 U CN 202220544034U CN 217393751 U CN217393751 U CN 217393751U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model provides a split type mouth of a river brick cup structure of ladle that can hot repair was changed, the upper end of mouth of a river brick cup is split type structure, including outer cover brick, inner core brick, the inner core brick is whole cyclic annularly, and the one end of inner core brick is equipped with bellied outer edge, the hole of outer cover brick and the appearance phase-match of inner core brick, inner core brick pass through the chamotte and fix inside outer cover brick. The inner core brick is an integral inner core brick or a split inner core brick, and the split inner core brick is formed by averagely dividing the inner core brick into a plurality of petals by taking the central axis of an inner hole of the inner core brick as a base line. The utility model has the advantages that: so as to prolong the service life of the refractory material of the ladle, reduce the consumption of the refractory material and improve the economic benefit. The utility model can realize the thermal maintenance and replacement of the ladle nozzle pocket brick, reduce the heat loss during the maintenance of the ladle, reduce the consumption of refractory materials and improve the economic benefit; shorten ladle maintenance duration, improve ladle turnover efficiency, improve work efficiency.
Description
Technical Field
The utility model relates to a technical field is repaired to the refractory material hot state, especially relates to a split type mouth of a river brick cup structure of ladle that can hot repair and change.
Background
The ladle (as shown in figure 1) plays a main role of external refining in the process of smelting molten steel, along with the continuous improvement of the quality and performance of steel products, the working condition of the ladle is more and more rigorous, when the ladle is used to the middle and later stages, the ladle needs to be repaired or replaced by refractory materials to ensure the safe use of the ladle, particularly, a ladle nozzle brick seat is quite harsh in working environment, is corroded by the molten steel, is partially corroded and damaged when tapping, is washed by the molten steel flow for a long time, causes the inner side of a steel flow channel of the nozzle brick seat, is reamed and shortened by a sealing area (hereinafter referred to as a sealing area) contacted with an upper nozzle, and the like, when the sealing area is shortened to a specified length due to the corrosion and washing action of the molten steel, the nozzle brick seat needs to be repaired or replaced, otherwise, a steel leakage accident can occur, and the method which is commonly adopted at present is to repair or replace the ladle from a hot state (about 800 ℃ -1000 ℃), naturally cooled to room temperature (about 10-30 c) and then replaced with new nozzle brick and other damaged refractory materials, but this method has the following disadvantages:
1. the ladle needs to be cooled to room temperature (about 10 ℃ -30 ℃) from a hot state (about 800 ℃ -1000 ℃), then the nozzle brick is replaced, and after the nozzle brick is replaced, the ladle is baked to a hot state (about 800 ℃ -1000 ℃) so as to be able to reload molten steel.
2. At present, most of the time, because nozzle pocket brick has reached the life-span, need to change, make ladle stall, but the impaired degree of refractory material of this moment other positions is lighter than nozzle pocket brick, can also use a lot of times, there is the problem that nozzle pocket brick life-span and other positions (for example slag line position) refractory material life-span are asynchronous, after having traded nozzle pocket brick, other positions (for example slag line position) refractory material are changed or not, will be very tangled, if change, can be very extravagant, if do not trade, must not reach the minor repair cycle of next time, so finally still change, cause very big waste, according to the wooden cask principle, the life-span of nozzle pocket brick is the shortest plank on the wooden cask, improve the life-span of nozzle pocket brick and just improved the life-span of whole ladle.
The disadvantages of the above-mentioned methods can be overcome if a hot repair and replacement technique for the nozzle brick cup is used. After the hot repair is finished, molten steel can be directly filled, the steel ladle can normally operate until the whole steel ladle refractory material reaches the same service life, and the steel ladle refractory material is subjected to minor repair again, so that the waste can be reduced, and the economic benefit is improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a split type mouth of a river brick cup structure of ladle that can hot repair changed to improve the ladle life of resistant material, reduce resistant material consumption, improve economic benefits.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a split type nozzle pocket brick structure of ladle that can hot repair was changed, the upper end of nozzle pocket brick is split type structure, includes overcoat brick, inner core brick, the whole ring-type that is of inner core brick, and the one end of inner core brick is equipped with bellied outer edge, the hole of overcoat brick and the appearance phase-match of inner core brick, inner core brick and overcoat brick bonding are fixed.
The inner core brick is an integral inner core brick or a split inner core brick, and the split inner core brick is formed by averagely dividing the inner core brick into a plurality of petals by taking the central axis of an inner hole of the inner core brick as a base line.
The split inner core brick has more than three sections.
The gap between the core bricks in the split body is not more than 1 mm.
The clearance between the outer sleeve brick and the inner core brick is not more than 1 mm.
The nozzle pocket brick is an integrated pocket brick or a split type pocket brick consisting of an upper nozzle pocket brick and a lower nozzle pocket brick.
Compared with the prior art, the beneficial effects of the utility model are that:
a split ladle nozzle brick cup structure capable of being hot repaired and replaced is used for prolonging the service life of ladle refractory materials, reducing the consumption of the refractory materials and improving economic benefits.
The utility model can realize the thermal maintenance and replacement of the ladle nozzle pocket brick, reduce the heat loss during the maintenance of the ladle, reduce the consumption of refractory materials and improve the economic benefit; shorten ladle maintenance time, improve ladle turnover efficiency, improve work efficiency.
Drawings
FIG. 1 is a bottom sectional view of a ladle.
Fig. 2 is a cross-sectional view of a conventional nozzle shoe.
Fig. 3 is a sectional view of the split nozzle upper seat brick of the utility model.
Fig. 4 is a perspective view of the integral inner core brick of the utility model.
Fig. 5 is a perspective view of the outer casing brick of the utility model.
Fig. 6 is a perspective view of the middle split inner core brick of the present invention.
In the figure: 1-ladle iron shell, 2-nozzle lower seat brick, 3-nozzle upper seat brick, 4-upper nozzle brick, 5-inner core brick, 6-outer sleeve brick, 7-integral inner core brick and 8-split inner core brick.
Detailed Description
The following further illustrates the embodiments of the present invention:
as shown in fig. 1-6: the utility model provides a split type nozzle pocket brick structure of ladle that can hot repair was changed, the upper end of nozzle pocket brick is split type structure, includes overcoat brick 6, inner core brick 5 is whole to be cyclic annular, and the one end of inner core brick 5 is equipped with bellied outer edge, the hole of overcoat brick 6 and the appearance phase-match of inner core brick 5, inner core brick 5 and overcoat brick 6 bonding are fixed.
The inner core brick 5 is an integral inner core brick 7 or a split inner core brick 8, and the split inner core brick 8 is divided into a plurality of petals averagely by taking the central axis of an inner hole of the inner core brick as a base line.
The split inner core brick 8 has more than three petals.
The gap between the split inner core bricks 8 is not more than 1 mm.
The clearance between the outer sleeve brick 6 and the inner core brick 5 is not more than 1 mm.
The nozzle pocket brick is an integrated pocket brick or a split type pocket brick consisting of an upper nozzle pocket brick 3 and a lower nozzle pocket brick 2.
A hot repair and replacement method for a ladle nozzle pocket brick comprises the following steps:
1) the upper end of the nozzle pocket brick is designed into a split structure in which an outer sleeve brick 6 and an inner core brick 5 are sleeved, the upper end of the inner core brick 5 is provided with a convex outer edge, the outer sleeve brick 6 and the inner core brick 5 are bonded and sealed through sintering-resistant refractory mortar, and the initial inner core brick 5 is an integral inner core brick 7;
2) then a set of split internal core bricks 8 is manufactured for standby, the split internal core bricks 8 are divided into a plurality of parts on average by taking the central axis of the inner hole of the internal core brick 5 as a base line, and the parts are combined to form a complete internal core brick 5;
3) when in hot repair and replacement, placing a hot ladle on a ladle tilting machine, taking the ladle opening as the horizontal direction, opening a sliding plate mechanism, removing an upper nozzle, exposing a nozzle brick seat, knocking off a residual inner core brick 5 after use by an electric pick, only leaving an outer sleeve brick 6, sequentially installing standby split inner core bricks 8 on the outer sleeve bricks 6 from the lower holes of the nozzle brick seat, and before installation, respectively smearing refractory clay between the split inner core bricks 8 and on the outer side;
4) because the outer sleeve brick 6 is in a hot state, the split inner core brick 5 with the refractory mortar can be quickly adhered to the outer sleeve brick 6, and the hot repair and replacement of the split nozzle pocket brick are completed.
The raw material ratio of the sintering-resistant refractory mortar between the outer sleeve brick 6 and the integral inner core brick 7 in the step 1) is as follows: 45-55 parts of 0.5mm-0 sintered tabular corundum, 12-18 parts of 180 meshes of sintered tabular corundum powder, 12-16 parts of 325 meshes of sintered tabular corundum powder, 2-2 parts of carbon black N7740.5, 2-4 parts of 500 meshes of graphite, 0.5-1.5 parts of aluminum powder with 200 meshes, 3-5 parts of chromium oxide powder with 200 meshes, 1-5 parts of dextrin and 2-10 parts of water.
The refractory mortar coated between the inner core bricks 8 and outside in the step 3) comprises the following raw materials in proportion: 34-45 parts of 0.5mm-0 sintered tabular corundum, 8-15 parts of activated alumina micropowder, 3-6 parts of calcined alumina micropowder, 15-25 parts of 325-mesh sintered tabular corundum powder, 4-6 parts of 0.5mm-0AR78 magnesium aluminate spinel, 4-6 parts of AR78 magnesium aluminate spinel, 2-5 parts of 0.5mm-0 fused magnesia, 3-5 parts of 200-mesh chromium oxide powder, 2-4 parts of ball clay and 5-10 parts of phosphoric acid or aluminum dihydrogen phosphate.
When in hot repair and replacement, the temperature of the hot steel ladle is 800-1200 ℃.
Because of the restriction of the manufacturing mode, the nozzle pocket brick has two types, the integrally manufactured nozzle pocket brick and the nozzle pocket brick which is divided into the upper nozzle pocket brick 3 and the lower nozzle pocket brick 2 are respectively manufactured, the two types have respective advantages and disadvantages, the nozzle pocket brick which is suitable for the user can be selected according to the use environment of each steel mill, most steel mills select the mode of manufacturing the upper nozzle pocket brick 3 and the lower nozzle pocket brick 2 respectively, because the lower nozzle pocket brick does not need to be replaced during minor repair, the consumption of refractory materials can be reduced, the economic benefit is improved, the upper nozzle pocket brick 3 is contacted with molten steel, the upper nozzle is arranged in front of the lower nozzle pocket brick 2 and can not be corroded under the general condition, only the upper nozzle pocket brick 3 is corroded by the molten steel, the utility model takes the upper nozzle pocket brick 3 as an example for explanation, but the integral nozzle pocket brick is also suitable for the utility model, because the molten steel is corroded to the upper half part only, the lower half has not been replaced because of safety and lack of steel leakage.
According to the size of a normal nozzle pocket brick and the corrosion and damage condition of the ladle nozzle pocket brick used in a steel mill, the thickness and the reaming size of the corroded part of the nozzle pocket brick can be known, so that the nozzle pocket brick can be designed in a split mode and is decomposed into an outer sleeve brick 6 and an inner core brick 5, the outer sleeve brick 6 and the inner core brick 5 are respectively manufactured, the inner core brick 5 is prepared into two sets, one set is an integral inner core brick 7, and the other set is a split inner core brick 8. The initial nozzle pocket block was made by installing the integral core block 7 into the outer sleeve block 6 and the split core block 8 for hot repair and replacement.
The size of the split nozzle pocket brick is the same as that of a normal nozzle pocket brick, the size of each part of the inner core brick 5 of the split nozzle pocket brick is determined according to the erosion condition of the nozzle pocket brick after being used in a steel mill, the size of the inner core brick is subtracted from that of the normal nozzle pocket brick to obtain the size of each part of the outer sleeve brick 6, the sizes of the inner core brick 5 and the outer sleeve brick 6 are in clearance fit, the clearance is smaller than 1mm, the gap is sealed by refractory clay which is not easy to sinter and is convenient to clean, and the thermal repair and replacement of the inner core brick are convenient.
The end part of the inner core brick 5 is provided with a raised annular outer edge which can prevent molten steel from infiltrating into a longitudinal gap between the inner core brick and the outer sleeve brick.
The split inner core brick 8 cannot be smaller than three pieces because the inner core brick smaller than three pieces cannot be fed into the outer sleeve brick 6 from the bottom hole due to the existence of the outer edge during replacement.
When the split nozzle pocket brick is used on a ladle, the inner core brick 5 is hot-repaired and replaced when the inner core is preliminarily judged to be eroded by about 80 percent according to experience.
Example 1: taking a 180-ton ladle of a certain steel mill as an example, the nozzle pocket brick is a combination of an upper nozzle pocket brick 3 and a lower nozzle pocket brick 2.
According to the size of normal nozzle pocket brick and the erosion condition of steel mill back ladle nozzle pocket brick, can know normal nozzle pocket brick and be eroded thickness and reaming size of part to this is according to, can carry out split type design to last nozzle pocket brick 3, and the resolvable is overcoat brick 6 and inner core brick 5, makes respectively to overcoat brick 6 and inner core brick 5, then installs inner core brick 5 in overcoat brick 6.
In order to be hot-repairable and replaceable, a split core brick 8 is manufactured for standby. The split inner core brick 8 is divided into 4 parts on average by taking the central axis of the circular hole of the inner core brick 5 as a baseline, the 4 split inner core bricks are combined to form the annular inner core brick, and the gap between the split inner core bricks is smaller than 1 mm.
The thickness of the inner core brick 5 is determined to be 50mm according to the erosion condition of the nozzle pocket brick used in the steel mill, the sizes of the inner core brick 5 and the outer sleeve brick 6 are in clearance fit, the clearance is smaller than 1mm, the gap is sealed by refractory clay which is not easy to sinter and is convenient to clean after use, and the raw material ratio is shown in table 1.
Table 1 example 1 raw material ratio table of refractory mortar between integral inner core brick and outer sleeve brick
The relationship between carbon element and molten steel and steel slag is not wetted, and the molten steel is prevented from permeating into gaps, so that even if carbon is partially oxidized, chromium oxide and tabular corundum powder can generate solid solution, the molten steel erosion resistance is high, and the molten steel cannot permeate into the gaps, so that the refractory mortar does not sinter the sleeve brick and the inner core brick together and can resist the molten steel erosion.
When the split nozzle pocket brick is used on a ladle, according to experience, when the inner core is primarily judged to be eroded by about 80 percent, carrying out hot repair and replacement on the inner core brick 5, placing a hot ladle to be replaced on a ladle tumbler to enable a ladle opening to be in a horizontal direction, opening a sliding plate mechanism, removing a water feeding opening to expose a nozzle brick seat, knocking off the residual inner core brick 5 after use by using an electric pick, leaving only the outer sleeve brick 6, then sequentially installing the manufactured split inner core brick 8 on the outer sleeve brick 6 from the hole of the nozzle brick seat by using a tool, refractory mortar is respectively coated between the split inner core bricks 8 and on the outer sides of the inner core bricks, the raw material ratio of the refractory mortar is shown in table 2, at this time, because the outer sleeve brick 6 is in a hot state, the inner core brick components with the refractory mortar can be quickly adhered to the outer sleeve brick 6, and then cleaning the redundant fire clay between the split inner core bricks, thus finishing the hot repair and replacement of the split nozzle pocket brick.
Table 2 example 1 raw material ratio table of refractory mortar between and outside split core bricks
The refractory mortar has strong bonding effect and high-temperature erosion resistance.
Claims (6)
1. The utility model provides a split type nozzle pocket brick structure of ladle that can hot repair was changed which characterized in that, the upper end of nozzle pocket brick is split type structure, includes overcoat brick, inner core brick, the whole ring-type that is of inner core brick, the one end of inner core brick is equipped with bellied outer edge, the hole of overcoat brick and the appearance phase-match of inner core brick, inner core brick and overcoat brick bonding are fixed.
2. The split ladle shroud pocket block structure capable of being hot-repaired and replaced according to claim 1, wherein the inner core block is an integral inner core block or a split inner core block, and the split inner core block is formed by equally dividing the inner core block into a plurality of segments by taking the central axis of the inner hole of the inner core block as a baseline.
3. The ladle split nozzle pocket brick structure capable of being hot-repaired and replaced according to claim 2, characterized in that the inner core brick of the split body has more than three segments.
4. The ladle split nozzle pocket brick structure capable of being hot repaired and replaced according to claim 2 or 3, wherein the gap between the split inner core bricks is not more than 1 mm.
5. The split ladle shroud block configuration of claim 1, wherein the gap between said outer jacket brick and said inner core brick is no greater than 1 mm.
6. The split ladle shroud block construction of claim 1, wherein the shroud block is an integral block or a split block comprising an upper shroud block and a lower shroud block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220544034.7U CN217393751U (en) | 2022-03-14 | 2022-03-14 | Split type nozzle brick cup structure of ladle that can hot repair changed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220544034.7U CN217393751U (en) | 2022-03-14 | 2022-03-14 | Split type nozzle brick cup structure of ladle that can hot repair changed |
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| CN217393751U true CN217393751U (en) | 2022-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734029A (en) * | 2022-03-14 | 2022-07-12 | 鞍山钢铁冶金炉材科技有限公司 | Hot repair replacement method for ladle nozzle pocket brick and nozzle pocket brick structure |
| CN116283249A (en) * | 2022-12-22 | 2023-06-23 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
-
2022
- 2022-03-14 CN CN202220544034.7U patent/CN217393751U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734029A (en) * | 2022-03-14 | 2022-07-12 | 鞍山钢铁冶金炉材科技有限公司 | Hot repair replacement method for ladle nozzle pocket brick and nozzle pocket brick structure |
| CN114734029B (en) * | 2022-03-14 | 2024-04-05 | 鞍山钢铁冶金炉材科技有限公司 | Hot repair replacement method for ladle nozzle pocket brick and nozzle pocket brick structure |
| CN116283249A (en) * | 2022-12-22 | 2023-06-23 | 鞍山钢铁冶金炉材科技有限公司 | Ladle nozzle pocket brick thermal state repairing material and preparation and use methods thereof |
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