CN210104000U - Novel RH refining furnace lower part groove hearth structure - Google Patents
Novel RH refining furnace lower part groove hearth structure Download PDFInfo
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- CN210104000U CN210104000U CN201920756895.XU CN201920756895U CN210104000U CN 210104000 U CN210104000 U CN 210104000U CN 201920756895 U CN201920756895 U CN 201920756895U CN 210104000 U CN210104000 U CN 210104000U
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Abstract
The utility model discloses a novel RH refining furnace lower groove furnace bottom structure, which comprises a furnace body, a working layer brick, a permanent layer brick, a heat preservation layer brick, a heat insulation layer brick, a clapboard, corundum castable and ramming mass; the outer shell at the bottom of the furnace body is of a concave arc structure, bottom bricks are built in the bottom of the furnace body, working layer bricks, permanent layer bricks, heat insulation layer bricks and heat insulation layer bricks are sequentially built on the furnace walls at the left side and the right side of the furnace body from inside to outside, a partition board concentric with the furnace body is arranged below the joint of the working layer bricks and the permanent layer bricks, and the partition board is arranged at the lower position inside the furnace body; the annular region intussuseption that forms at baffle and furnace body inner wall is filled with the corundum pouring material, the utility model discloses a metal partition falls into two regions with stove bottom ramming material to replace the ramming material that is close to the regional usefulness of barrel with the corundum pouring material, increase resistant material intensity, thereby solve the ramming material and move down, intensity reduces the scheduling problem.
Description
Technical Field
The utility model belongs to the technical field of the RH refining furnace is made, concretely relates to novel RH refining furnace lower part groove bottom construction.
Background
At present, most of steel mills in China adopt an RH refining method. Before molten steel is treated, the inserting pipes are immersed into molten steel in a ladle to be treated, and two inserting pipes, namely an ascending pipe and a descending pipe, are communicated with a vacuum furnace.
In a vacuum state, argon, hydrogen, carbon monoxide and other gases in molten steel flowing through the vacuum chamber are pumped away in the molten steel circulation process. Meanwhile, the molten steel also carries out a series of metallurgical reactions, and the molten steel is purified by circularly degassing and refining. Because the refining process is harsh, the RH refining furnace is constantly impacted by high-temperature molten steel and is acted by intermittent large temperature difference in the using process, particularly, the lower groove bottom refractory material of the RH refining furnace, which is directly contacted with the molten steel, is used as a key part of the RH refining furnace, and the service life of the position directly influences the using condition of the RH refining furnace.
At present, a universal RH refining furnace lower groove furnace bottom steel shell is of a concave arc structure, so that the furnace bottom refractory material needs to be paved at the furnace bottom by adopting a ramming material when being built, and an upper layer refractory material is built after the furnace bottom is horizontal. The method is characterized in that after the vacuum refining furnace is used for a certain period, the bottom refractory material needs to be dug and repaired for reuse, the ramming material close to the center of the bottom of the furnace needs to be removed and dug and repaired in each period, and the ramming material close to the steel shell around the groove barrel at the lower part of the RH refining furnace is not dug and repaired generally. The existing furnace bottom refractory structure has the following problems in the use process: 1. after the ramming material close to the center of the furnace bottom is demolished and excavated, because the radian of the steel shell position around the groove barrel body at the lower part of the RH refining furnace is large, the ramming material which is not demolished and excavated often has the problems of downward movement along the center of the steel shell furnace bottom, great reduction of the intensity of the ramming material and the like; 2. after the ramming material moves downwards at the position of the steel shell around the cylinder body and the strength is reduced, the lower groove permanent layer, the heat insulation layer and the heat insulation layer built on the upper layer all move downwards, so that accidents of serious corrosion of refractory materials, even steel penetration and steel leakage are often caused, and the whole service life of the RH refining furnace is directly influenced.
Disclosure of Invention
The utility model provides a novel RH refining furnace lower groove furnace bottom structure for solving the technical problems, which has simple design structure and convenient operation; can effectively solve the problems of downward movement, strength reduction and the like of the ramming material and eliminate the accident risk caused by the sinking of the lower groove permanent layer, the heat insulation layer and the heat insulation layer, thereby improving the whole service life and the operation efficiency of the RH refining furnace.
The utility model adopts the technical proposal that: a novel RH refining furnace lower groove furnace bottom structure comprises a furnace body, a working layer brick, a permanent layer brick, a heat insulation layer brick, a partition plate, corundum castable and ramming mass; the outer shell at the bottom of the furnace body is of a concave arc structure, bottom bricks are built in the bottom of the furnace body, working layer bricks, permanent layer bricks, heat insulation layer bricks and heat insulation layer bricks are sequentially built on the furnace walls at the left side and the right side of the furnace body from inside to outside, a partition board concentric with the furnace body is arranged below the joint of the working layer bricks and the permanent layer bricks, and the partition board is arranged at the lower position inside the furnace body; and corundum castable is filled in an annular area formed by the partition plate and the inner wall of the furnace body, and ramming mass is filled in an annular area formed by the partition plate and the bottom brick.
The baffle is made of metal and has the brand number of 45# or Q235.
The baffle is of an annular structure, and the lower end of the baffle is welded at the bottom of the furnace body.
Corundum castable is filled in an annular area formed by the partition plate and the inner wall of the furnace body; the purpose of this is: the corundum castable is a refractory castable prepared by using corundum as an aggregate and adding a plurality of bonding agents to powder, has higher mechanical strength, abrasion resistance and other properties than common castable, and can solve the problems of downward movement, strength reduction and the like of ramming mass.
The utility model discloses beneficial effect that technical scheme brought as follows:
1. the steel shell position radian is big all around of RH refining furnace lower part groove barrel among the prior art, and this position does not demolish, dig the ramming material of repairing often appears along moving down, ramming material intensity reduces the scheduling problem by a wide margin at steel shell stove bottom center, and the utility model discloses a metal partition falls into two regions with stove bottom ramming material to replace the corundum pouring material for the ramming material that is close to the regional usefulness of barrel, increase refractory strength, thereby solve the ramming material and move down, intensity reduces the scheduling problem.
2. In the prior art, after ramming materials move downwards at the position of a steel shell around a cylinder body and the strength is reduced, a lower groove permanent layer, a heat insulation layer and a heat insulation layer built on the upper layer all move downwards, so that accidents of serious corrosion of refractory materials, even steel penetration and steel leakage are often caused. Adopt the utility model discloses above-mentioned shortcoming can avoid completely afterwards.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
fig. 3 is a partial enlarged view of the present invention.
The labels in the figure are: 1. a furnace body; 2. working layer bricks; 3. permanent layer bricks; 4. insulating layer bricks; 5. a thermal insulation layer brick; 6. a partition plate; 7. corundum castable; 8. ramming the material; 9. a furnace bottom brick.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in the figure, the novel RH refining furnace lower groove furnace bottom structure comprises a furnace body 1, working layer bricks 2, permanent layer bricks 3, heat insulation layer bricks 4, heat insulation layer bricks 5, partition plates 6, corundum castable 7, ramming mass 8 and furnace bottom bricks 9;
the shell at the bottom of the furnace body 1 is of a concave arc structure, wherein the joint of the furnace wall and the furnace bottom is arc-shaped, the furnace bottom is horizontal, furnace bottom bricks 9 are built in the bottom of the furnace body 1, the furnace bottom bricks 9 mainly adopt high-purity and micro-porous magnesia-alumina spinel machine pressed bricks, the content of magnesium in the bricks is more than or equal to 90 percent, the flexural strength is 10-15MPa, and the compressive strength is 60-80 MPa; the furnace wall at the inner side of the furnace body 1 is sequentially built with a working layer brick 2, a permanent layer brick 3, a heat insulation layer brick 4 and a heat insulation layer brick 5 from inside to outside,
a partition plate 6 concentric with the furnace body 1 is arranged at the lower position of the joint of the working layer bricks 2 and the permanent layer bricks 3, and the partition plate 6 is arranged at the lower position inside the furnace body 1;
the annular area formed by the partition board 6 and the inner wall of the furnace body 1 is filled with corundum castable 7, the corundum castable 7 is a refractory castable prepared by taking corundum as aggregate, adding some bonding agents into powder, and specifically adopting Al2O3The corundum refractory castable is used as a main component, and the volume density of the corundum refractory castable is more than 3g/cm3The rupture strength is 8-15MPa, the compressive strength is 60-90MPa, and the anti-scouring and anti-corrosion properties and the refractoriness under load (1700 ℃) are high;
the annular area formed by the partition plate 6 and the hearth bricks 9 is filled with ramming mass 8, the ramming mass 8 is an unshaped refractory material which is constructed by adopting a ramming (manual or mechanical) method and is hardened under the heating action, magnesia is taken as a main raw material, and various powder materials are added to combine to prepare a bulk material.
The partition board 6 is made of metal and has the brand number of Q235 or Q345.
The baffle 6 is of an annular structure, and the lower end of the baffle 6 is welded at the bottom of the furnace body 1.
In the prior art, the radian of the steel shell position around the groove cylinder body at the lower part of the RH refining furnace is large, the ramming material 8 which is not dismantled and excavated and repaired at the position often has the problems of downward movement along the center of the bottom of the steel shell furnace, great reduction of the strength of the ramming material 8 and the like, but the utility model adopts the metal partition plate 6 to divide the furnace bottom ramming material 8 into two areas, the two ends of the metal partition plate 6 are rigidly welded with the furnace body 1, and the situation that the ramming material 8 sinks before can be effectively avoided; and the ramming material 8 close to the cylinder area is replaced by the corundum castable 7, and the corundum castable 7 has higher mechanical strength, erosion resistance and other properties, and can increase the strength of refractory material, thereby solving the problems of downward movement, strength reduction and the like of the ramming material 8.
In the prior art, after ramming materials 8 are moved downwards at the positions of steel shells around a furnace body 1 and the strength is reduced, a lower groove permanent layer, a heat insulation layer and a heat insulation layer built on the upper layer all move downwards, so that accidents of serious corrosion of refractory materials, even steel penetration and steel leakage are often caused; the utility model provides a metal baffle 6 and corundum pouring material 7 can avoid ramming material 8 to move down, the condition that intensity reduces appears to make permanent layer of lower part groove, heat preservation, the insulating layer that RH refining furnace lower part groove furnace body upper strata was built by laying bricks or stones can not appear moving down the condition, can effectively avoid resistant material to corrode the occurence of failure that seriously causes wearing steel, bleed-out.
Claims (3)
1. The utility model provides a novel RH refining furnace lower part groove hearth structure which characterized in that: comprises a furnace body, a working layer brick, a permanent layer brick, a heat insulation layer brick, a partition board, corundum castable and ramming mass; the outer shell at the bottom of the furnace body is of a concave arc structure, bottom bricks are built in the bottom of the furnace body, working layer bricks, permanent layer bricks, heat insulation layer bricks and heat insulation layer bricks are sequentially built on the furnace walls at the left side and the right side of the furnace body from inside to outside, a partition board concentric with the furnace body is arranged below the joint of the working layer bricks and the permanent layer bricks, and the partition board is arranged at the lower position inside the furnace body; and corundum castable is filled in an annular area formed by the partition plate and the inner wall of the furnace body, and ramming mass is filled in an annular area formed by the partition plate and the bottom brick.
2. The novel RH refining furnace lower tank furnace bottom structure of claim 1, wherein: the partition plate is made of metal and has the brand number of 45# or Q235.
3. The novel RH refining furnace lower tank furnace bottom structure of claim 1, wherein: the baffle is the loop configuration, and the baffle lower extreme welds in furnace body bottom position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756895.XU CN210104000U (en) | 2019-05-24 | 2019-05-24 | Novel RH refining furnace lower part groove hearth structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756895.XU CN210104000U (en) | 2019-05-24 | 2019-05-24 | Novel RH refining furnace lower part groove hearth structure |
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| Publication Number | Publication Date |
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| CN210104000U true CN210104000U (en) | 2020-02-21 |
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| CN201920756895.XU Active CN210104000U (en) | 2019-05-24 | 2019-05-24 | Novel RH refining furnace lower part groove hearth structure |
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- 2019-05-24 CN CN201920756895.XU patent/CN210104000U/en active Active
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Effective date of registration: 20210220 Address after: 471322 Baisha Town Industrial Agglomeration Area, Yichuan County, Luoyang City, Henan Province Patentee after: Luoyang Lier Functional Materials Co.,Ltd. Address before: 471000 Luolong science and Technology Park, Luoyang hi tech Industrial Development Zone, Henan Province Patentee before: LUOYANG LIER REFRACTORY MATERIAL Co.,Ltd. |
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| TR01 | Transfer of patent right |