Blast furnace structure capable of preventing blast furnace bottom plate from upwarping
The blast furnace design, featuring arc-shaped connections and a multi-layered refractory structure, solved the problem of the blast furnace bottom plate tilting, enhanced the stability of the furnace bottom and sidewalls, reduced the risk of gas leakage, and extended the service life of the blast furnace.
Patent Information
- Application Number
- CN202423171986.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-23
AI Technical Summary
After blast furnaces are put into operation, the bottom plate is prone to warping, which can cause the bottom sealing plate to be separated from the furnace shell, resulting in gas leakage and deformation of carbon bricks. In severe cases, it may crack, affecting the normal operation of the blast furnace.
The furnace bottom sealing plate and furnace hearth and shell are connected by an arc shape, combined with a multi-layer refractory structure and buffer layer, including furnace bottom carbon bricks, semi-thermal conductive castable, side wall carbon bricks, buffer layer and labyrinth connection, to enhance the strength and stability of the furnace bottom and side walls and reduce the effects of thermal expansion and contraction.
It effectively prevents the furnace bottom plate from warping, reduces the risk of gas leakage, extends the service life of the blast furnace, and reduces the possibility of carbon brick deformation and cracking.
Smart Images
Figure CN223576520U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to blast furnace design technical field especially relates to a blast furnace structure of preventing blast furnace bottom plate from warping. BACKGROUND
[0002] In recent years, many blast furnaces have the phenomenon of serious warping of the bottom sealing plate and abnormal rising of the furnace shell after being put into production for a short time. The warping of the bottom sealing plate of the blast furnace has become a problem recognized by the domestic iron-making industry. After the furnace shell rises, the edge outer ring part of the bottom plate warps, and the bottom water pipe is isolated. The width of the isolation is related to the degree of warping, and the serious one is up to 2.5 meters. When the welding strength of the bottom plate and the furnace shell is not enough, the ring gap will be completely cracked, causing the bottom to leak gas, and the bottom carbon brick will also be deformed. The horizontal gap of the ring carbon increases, and after the vertical transmission, it can cause the deformation of the middle sleeve and the leakage of gas between the middle sleeve and the large sleeve. In severe cases, the large sleeve will also be cracked, and sometimes the corrugated pipe of the furnace top gas riser will also be extruded and deformed.
[0003] At present, there are three kinds of reasons for the warping of the bottom plate: the effect of blind plate force, harmful impurities causing the rising of the brick lining refractory, and insufficient strength of the bottom plate. After research, it is found that the main reason for the warping of the bottom plate is more related to the refractory of the hearth and the structure of the furnace shell. Therefore, it is necessary to provide a blast furnace structure for preventing the warping of the bottom plate of the blast furnace to solve the above problems. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a blast furnace structure for preventing the warping of the bottom plate of the blast furnace to solve the problem of the warping of the bottom plate of the blast furnace.
[0005] The utility model provides a blast furnace structure for preventing the warping of the bottom plate of the blast furnace, which comprises a bottom sealing plate and a hearth furnace shell; the bottom sealing plate is located at the bottom of the hearth furnace shell, the hearth furnace shell is in a straight cylinder type, and the connection between the bottom sealing plate and the hearth furnace shell adopts an arc connection; a bottom refractory is arranged above the bottom sealing plate, the bottom refractory comprises bottom carbon bricks and two layers of bottom semi-thermal castable poured on the bottom carbon bricks; a side wall refractory is arranged on the inner side of the hearth furnace shell and above the bottom refractory, the side wall refractory comprises side wall carbon bricks, side wall semi-thermal castable located on the inner side of the side wall carbon bricks, and high-thermal castable located on the outer side of the side wall carbon bricks; a side wall ring carbon and a middle sleeve are arranged above the hearth furnace shell, and a buffer layer is laid on the upper surface of the side wall ring carbon and the lower half of the middle sleeve.
[0006] Further, the volume of the side wall carbon bricks is greater than that of the bottom carbon bricks.
[0007] Further, the buffer layer is fiber cotton.
[0008] Further, the pouring of the hearth refractory and the side wall refractory adopts a labyrinth connection.
[0009] The utility model discloses a following beneficial effect: the utility model discloses a prevent high furnace bottom plate from warping high furnace structure, include: furnace bottom sealing plate and furnace hearth shell, furnace bottom sealing plate is located furnace hearth shell bottom, furnace hearth shell is straight cylinder type, and the connection of furnace bottom sealing plate and furnace hearth shell adopts arc connection, and the top of furnace bottom sealing plate is provided with furnace bottom refractory, and furnace bottom refractory includes furnace bottom carbon brick and two layers of furnace bottom semi -thermal pouring material that pours on the furnace bottom carbon brick, and the inboard of furnace hearth shell and the top of furnace bottom refractory is provided with side wall refractory, and side wall refractory includes side wall carbon brick, the side wall semi -thermal pouring material that is located side wall carbon brick inboard and the high thermal conductivity pouring material that is located side wall carbon brick outboard, and the top of side wall ring carbon and the middle sleeve of furnace hearth shell is provided with, and the upper surface of side wall ring carbon and the lower half ring of middle sleeve are laid with buffer layer, can effectively solve the problem that high furnace bottom plate warps. BRIEF DESCRIPTION OF DRAWINGS
[0010] In order to more clearly illustrate the technical scheme of the utility model, the following will be to the embodiment needed to use the drawing briefly introduced, obviously, for those of ordinary skill in the art, without the premise of paying the creative labor, can also obtain other drawings according to these drawings.
[0011] Figure 1 The utility model provides a prevent high furnace bottom plate from warping high furnace structure section view schematic diagram for the utility model.
[0012] Figure 2 It is the arc connection area schematic diagram for furnace bottom sealing plate and furnace hearth shell.
[0013] Illustration: 1-furnace bottom sealing plate;2-furnth hearth shell;3-furnace bottom semi -thermal pouring material;4-side wall semi -thermal pouring material;5-buffer layer;6-furnace bottom carbon brick;7-side wall carbon brick;8-high thermal conductivity pouring material;9-side wall ring carbon;10-middle sleeve. DETAILED DESCRIPTION
[0014] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments. It should be pointed out that the following detailed description is exemplary and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art.
[0015] For purposes of the description hereinafter, spatial relative terms, such as "on", "above", "at", "below", "down", "up", "top", "bottom", and the like, can be used to describe an element's relationship to another element as illustrated in the figures. It is to be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if an element in the figures is oriented vertically, it will be understood that this element can also be oriented horizontally or at other orientations, unless the context clearly dictates otherwise. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated at 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.
[0016] Example embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These Example embodiments may, however, be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these Example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art, and, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same reference numerals are used in different drawings to designate the same elements, and thus the description will not be repeated.
[0017] Referring to Figure 1 The embodiment of the utility model provides a high furnace structure of preventing the furnace bottom plate of high furnace from warping, which comprises: furnace bottom sealing plate 1 and furnace shell 2 of furnace chamber.
[0018] The furnace bottom sealing plate 1 is located at the bottom of the furnace shell 2 of the furnace chamber, and the furnace shell 2 of the furnace chamber is in a straight cylinder type. The straight cylinder type furnace shell design avoids the downward pressure of the inclined furnace shell on the sidewall refractory in the traditional structure, reduces the lifting influence of the upward expansion of the sidewall refractory of the furnace chamber on the furnace shell, and only the friction force applied to the furnace shell by the furnace remains, which can reduce the upward pulling force applied by the upward expansion of the sidewall refractory of the furnace chamber, and further can reduce the possibility of warping of the furnace bottom plate. Figure 2 For Figure 1 The connection between the furnace bottom sealing plate 1 and the furnace shell 2 of the furnace chamber is arc-shaped, which can effectively alleviate the excessive concentration of the blind plate force at the joint between the furnace bottom plate and the sidewall furnace shell, and prevent cracking.
[0019] The furnace bottom refractory is arranged above the furnace bottom sealing plate 1, and the furnace bottom refractory comprises furnace bottom carbon bricks 6 and two layers of furnace bottom semi-thermal pouring materials 3 poured on the furnace bottom carbon bricks 6. On the basis of the traditional furnace bottom carbon bricks, two layers of pouring materials are poured to enhance the strength of the furnace bottom and reduce the warping of the furnace bottom plate.
[0020] The side wall refractory is arranged above the furnace bottom refractory in the furnace shell 2, and comprises side wall carbon bricks 7, side wall semi-heat-conducting castable 4 arranged inside the side wall carbon bricks 7, and high-heat-conducting castable 8 arranged outside the side wall carbon bricks 7; the volume of the side wall carbon bricks 7 is greater than that of the furnace bottom carbon bricks 6. The side wall refractory adopts the form of large bricks plus integral casting, which can prevent harmful substances such as alkali metals, lead and zinc from invading the side wall carbon bricks, ensure the volume stability of the carbon bricks, reduce the upward lifting force on the furnace shell, and thus solve the problem of the upward warping of the furnace bottom plate.
[0021] The side wall ring carbon 9 and the middle sleeve 10 are arranged above the furnace shell 2, and the upper surface of the side wall ring carbon 9 and the lower half of the middle sleeve 10 are paved with the buffer layer 5. The structure of two layers of buffer layers, the upper surface of the side wall ring carbon being paved with fiber cotton and the lower half of the middle sleeve being paved with fiber cotton, can buffer the expansion of the side wall refractory and the upward lifting force on the tuyere.
[0022] The furnace bottom refractory and the side wall refractory are cast by means of a labyrinth connection, which can ensure that the furnace hearth is cast into a more truly integral whole, effectively block the invasion of harmful impurities such as alkali metals, lead and zinc into the carbon bricks, reduce the degree of expansion and upward rising of the side wall carbon bricks, and eliminate the main upward pulling force. The integral casting technology has another good feature that the temperature of the hot surface of the carbon bricks can be reduced to below 650 DEG C, so as to further reduce the upward expansion amount caused by the thermal expansion and contraction of the carbon bricks themselves and the upward pulling force transmitted to the furnace shell.
[0023] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0024] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0025] The preferred embodiments of the present application have been described above with the preferred embodiments; however, all the changes and variations that can be made on the basis of the principles of the present application without departing from the spirit and principles thereof shall fall within the scope of the present application.
Claims
1. A blast furnace structure for preventing the bottom plate of a blast furnace from warping, characterized in that, include: The furnace bottom sealing plate (1) and the furnace shell (2) are provided; the furnace bottom sealing plate (1) is located at the bottom of the furnace shell (2), the furnace shell (2) is cylindrical, and the connection between the furnace bottom sealing plate (1) and the furnace shell (2) is an arc connection; a furnace bottom refractory material is provided above the furnace bottom sealing plate (1), the furnace bottom refractory material includes furnace bottom carbon bricks (6) and two layers of furnace bottom semi-conductive castable refractory (3) cast on the furnace bottom carbon bricks (6); the furnace shell (2) is located at the bottom of the furnace shell (2), the furnace bottom refractory material is located at the bottom of the furnace shell (2), the furnace shell (2) is a cylindrical shape, and the connection between the furnace bottom sealing plate (1) and the furnace shell (2) is an arc connection; a furnace bottom refractory material is provided above the furnace bottom sealing plate (1), the furnace bottom refractory material includes furnace bottom carbon bricks (6) and two layers of furnace bottom semi-conductive castable refractory (3) cast on the furnace bottom carbon bricks (6); the furnace shell (2) is a cylindrical shape, ... Sidewall refractory is provided on the inner side of the shell (2) and above the furnace bottom refractory. The sidewall refractory includes sidewall carbon brick (7), sidewall semi-thermal conductive castable (4) located inside the sidewall carbon brick (7), and high thermal conductivity castable (8) located outside the sidewall carbon brick (7). A sidewall ring carbon (9) and a middle sleeve (10) are provided above the furnace shell (2). A buffer layer (5) is laid on the upper surface of the sidewall ring carbon (9) and the lower half of the middle sleeve (10).
2. The blast furnace structure for preventing the bottom plate of the blast furnace from warping as described in claim 1, characterized in that, The volume of the sidewall carbon brick (7) is larger than the volume of the furnace bottom carbon brick (6).
3. A blast furnace structure for preventing the bottom plate of a blast furnace from warping as described in claim 1, characterized in that, The buffer layer (5) is made of fiber cotton.
4. A blast furnace structure for preventing the bottom plate of a blast furnace from warping as described in claim 1, characterized in that, The casting of the furnace bottom refractory and the sidewall refractory adopts a labyrinth connection.