Furnace lining building structure of refining electric furnace

Abstract

The utility model belongs to the technical field of refining electric furnaces, and particularly relates to a lining building structure of a refining electric furnace, which comprises an isolating layer adhered to a furnace bottom and a furnace wall, a leveling layer arranged on the upper surface of the isolating layer of the furnace bottom, a heat insulation layer arranged on the upper surface of the leveling layer, two layers of bottom magnesia bricks built on the upper surface of the heat insulation layer, and a lining layer arranged on the lower surface of the bottom magnesia bricks. A medium-temperature magnesian ramming material layer is arranged on the upper surface of the bottom magnesite brick, and a low-temperature magnesian ramming material layer is arranged on the upper surface of the medium-temperature magnesian ramming material layer. The medium-temperature magnesian ramming material layer and the low-temperature magnesian ramming material layer are arranged at the bottom of the furnace, and the medium-temperature magnesian ramming material layer and the low-temperature magnesian ramming material layer can form a compact crystal network without gaps after being heated. And the anti-scouring capability of molten iron and slag is strong, and the anti-scouring agent has relatively strong resistance to alkaline slag and iron oxide.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of refining electric furnace, concretely relates to a refining electric furnace furnace lining masonry structure. BACKGROUND

[0002] The refining electric furnace is the main equipment of smelting ferroalloy, and the furnace lining is an important component of the refining electric furnace, which is used for bearing extreme working conditions such as high temperature, high pressure and chemical corrosion. It not only can prolong the service life of the refining electric furnace, but also can improve the smelting efficiency and product quality. The traditional furnace lining is built by brick lining or casted by single whole, which is easy to appear problems such as falling off and collapsing, fast erosion, difficult routine maintenance, low safety factor and resource waste, which seriously hinders and restricts the improvement of the output and benefit of the steel enterprise. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a refining electric furnace furnace lining masonry structure for above problems.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of refining electric furnace furnace lining masonry structure, including the isolation layer being bonded in furnace bottom and furnace wall, the upper surface of the isolation layer in the furnace bottom is provided with leveling layer, the upper surface of the leveling layer is provided with heat insulation layer, two layers of bottom magnesium brick are built in the upper surface of the heat insulation layer, the upper surface of the bottom magnesium brick is provided with middle temperature magnesium ramming material layer, the upper surface of the middle temperature magnesium ramming material layer is provided with low temperature magnesium ramming material layer, the inner side of the isolation layer on the furnace wall is provided with multilayer vertical masonry magnesium brick, and the vertical masonry magnesium brick is located on the upper surface of low temperature magnesium ramming material layer, the upper surface of the low temperature magnesium ramming material layer is also built with tapping channel, the inner side of the vertical masonry magnesium brick is built with ladder type structure by magnesium brick, the lower part between the vertical masonry magnesium brick of the ladder type structure is filled with high temperature magnesium ramming material layer, the height of the high temperature magnesium ramming material layer is the height of four layers of magnesium brick, multilayer vertical masonry firebrick is provided above the vertical masonry magnesium brick, upper magnesium brick is provided in the inner side of the vertical masonry firebrick, plugging magnesium brick is jointly built above the vertical masonry firebrick and upper magnesium brick, the upper surface of the plugging magnesium brick is flush with the upper end surface of the refining electric furnace.

[0006] Further, the material of the isolation layer is stone wool board.

[0007] Further, the material of the leveling layer is magnesia.

[0008] Further, the heat insulation layer is light weight mullite insulating brick.

[0009] Further, the tapping channel is arranged in an inclined manner, and the inclination angle is 5°.

[0010] Further, the tapping channel is built by magnesia-chromite spinel bricks.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses a middle temperature magnesium quality ramming material layer and low temperature magnesium quality ramming material layer are set up at the furnace bottom, and the middle temperature magnesium quality ramming material layer and low temperature magnesium quality ramming material layer can form the dense crystal network after being heated, and have no gap. The ability of resisting molten iron and slag erosion is strong, and the resistance to alkaline slag and iron oxide is strong.

[0013] The utility model discloses a high temperature magnesium quality ramming material layer is filled between the lower part of the stepped structure and the vertical built magnesium brick, and the part is the molten iron storage area. The high temperature molten iron has great erosion effect on the refractory material. The long time high temperature can make the high temperature magnesium quality ramming material layer sinter into ceramic phase, and has good high temperature resistance and slag iron erosion resistance.

[0014] The utility model discloses a tapping channel is built by magnesia-chromite spinel bricks, and the high temperature resistance and erosion resistance are good, and the service life of the tapping channel can be prolonged.

[0015] The utility model discloses a tapping channel is built by magnesia-chromite spinel bricks, and the high temperature resistance and erosion resistance are good, and the service life of the tapping channel can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the utility model Figure 1 It is the partial close -up drawing of middle circle A;

[0018] Figure 3 It is the utility model Figure 1 It is the partial close -up drawing of middle frame B;

[0019] In the drawing, the isolation layer 1, the leveling layer 2, the heat insulation layer 3, the bottom magnesium brick 4, the middle temperature magnesium quality ramming material layer 5, the low temperature magnesium quality ramming material layer 6, the vertical built magnesium brick 7, the tapping channel 8, the stepped structure 9, the high temperature magnesium quality ramming material layer 10, the vertical built refractory brick 11, the upper magnesium brick 12, the plugging magnesium brick 13, the magnesia-chromite spinel brick 14. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical scheme of the utility model, the utility model will be further illustrated by the following examples.

[0021] AsFigures 1 to 3 As shown in the figure, a refining electric furnace lining structure comprises an isolation layer 1 bonded to the furnace bottom and furnace wall, the isolation layer 1 is made of asbestos board, a leveling layer 2 is arranged on the upper surface of the isolation layer 1 of the furnace bottom, the leveling layer 2 is made of magnesia, a heat insulation layer 3 is arranged on the upper surface of the leveling layer 2, the heat insulation layer 3 is light-weight mullite insulating brick, two layers of bottom magnesium brick 4 are built on the upper surface of the heat insulation layer 3, a medium-temperature magnesium ramming material layer 5 is arranged on the upper surface of the bottom magnesium brick 4, a low-temperature magnesium ramming material layer 6 is arranged on the upper surface of the medium-temperature magnesium ramming material layer 5, a plurality of layers of vertical magnesium brick 7 are arranged on the inner side of the isolation layer 1 on the furnace wall, and the vertical magnesium brick 7 is located on the upper surface of the low-temperature magnesium ramming material layer 6, a tapping channel 8 is also built on the upper surface of the low-temperature magnesium ramming material layer 6, the tapping channel 8 is arranged in an inclined manner, the inclination angle is 5°, and the tapping channel 8 is built by magnesium-chrom spinel brick 14, a ladder-shaped structure 9 is built by magnesium brick on the inner side of the vertical magnesium brick 7, the lower part of the ladder-shaped structure 9 is filled with a high-temperature magnesium ramming material layer 10 between the vertical magnesium brick 7, the height of the high-temperature magnesium ramming material layer 10 is the height of four layers of magnesium brick, a plurality of layers of vertical refractory brick 11 are arranged above the vertical magnesium brick 7, upper magnesium brick 12 is arranged on the inner side of the vertical refractory brick 11, and blocking magnesium brick 13 is jointly built above the vertical refractory brick 11 and the upper magnesium brick 12, the upper surface of the blocking magnesium brick 13 is flush with the upper end surface of the refining electric furnace.

[0022] The main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0023] In addition, it should be understood that although the present application is described in the form of embodiments, each embodiment does not contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A refining electric furnace lining construction, characterized by: The application relates to a furnace bottom and furnace wall isolation layer (1), wherein a leveling layer (2) is arranged on the upper surface of the furnace bottom isolation layer (1), a heat insulation layer (3) is arranged on the upper surface of the leveling layer (2), two layers of bottom magnesium bricks (4) are built on the upper surface of the heat insulation layer (3), a medium-temperature magnesium ramming material layer (5) is arranged on the upper surface of the bottom magnesium bricks (4), a low-temperature magnesium ramming material layer (6) is arranged on the upper surface of the medium-temperature magnesium ramming material layer (5), a plurality of layers of vertical magnesium bricks (7) are arranged on the inner side of the furnace wall isolation layer (1), the vertical magnesium bricks (7) are located on the upper surface of the low-temperature magnesium ramming material layer (6), a tapping channel (8) is built on the upper surface of the low-temperature magnesium ramming material layer (6), a ladder-shaped structure (9) is built on the inner side of the vertical magnesium bricks (7) through magnesium bricks, a high-temperature magnesium ramming material layer (10) is filled between the lower part of the ladder-shaped structure (9) and the vertical magnesium bricks (7), the height of the high-temperature magnesium ramming material layer (10) is equal to the height of four layers of magnesium bricks, a plurality of layers of vertical refractory bricks (11) are arranged above the vertical magnesium bricks (7), upper magnesium bricks (12) are arranged on the inner side of the vertical refractory bricks (11), and blocking magnesium bricks (13) are jointly built above the vertical refractory bricks (11) and the upper magnesium bricks (12), the upper surface of the blocking magnesium bricks (13) is flush with the upper end surface of the refining electric furnace.

2. A refining electric furnace lining construction according to claim 1, characterized in that: The material of the isolation layer (1) is stone wool board.

3. A refining electric furnace lining construction according to claim 1, characterized in that: The material of the leveling layer (2) is magnesia.

4. A refining electric furnace lining construction according to claim 1, characterized in that: The heat insulation layer (3) is light-weight mullite insulation brick.

5. A refining electric furnace lining construction according to claim 1, characterized in that: The tapping channel (8) is arranged in an inclined manner, and the inclination angle is 5 degrees.

6. A refining electric furnace lining construction according to claim 5, characterized in that: The tapping channel (8) is built by magnesiochromite bricks (14).

Images