Ruhrstahl-Heraeus (RH) refining furnace upper groove masonry structure

Abstract

The utility model belongs to the technical field of RH refining furnace masonry structures, and particularly discloses an RH refining furnace upper groove masonry structure which is characterized in that a pouring layer prepared in a pouring mode is arranged in a furnace shell, a plurality of anchoring parts are evenly distributed in the pouring layer, one end of each anchoring part is connected with the inner wall of the furnace shell in a welded mode, and the other end of each anchoring part is connected with the outer wall of the furnace shell in a welded mode. The nanometer composite board is further arranged between the inner wall of the furnace shell and the pouring layer, the heat conductivity coefficient of the nanometer composite board is extremely small, the heat preservation effect is good, due to the fact that the whole furnace wall adopts the pouring layer formed through pouring, the overall effect is good, the possibility of brick structure through joints is greatly reduced, the risk that steel penetrates through the furnace wall is reduced, and the service life of the upper groove is prolonged. And the masonry workload is greatly reduced, the labor intensity of workers is relieved, the construction period of masonry maintenance of the upper groove is shortened, and therefore the operation efficiency of the RH refining furnace is improved, meanwhile, compared with a brick structure, the refractory material cost is saved, and the cost can be greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to RH refining furnace masonry structure technical field, specifically disclose a kind of RH refining furnace upper tank masonry structure. BACKGROUND

[0002] RH vacuum refining furnace is one of important smelting containers of clean steel, and its main structure is divided into upper tank, middle tank, bottom tank, circulation pipe and immersion tube, etc., in the RH vacuum refining process, molten steel is extracted into vacuum chamber under the action of vacuum pressure, and molten steel liquid surface is usually in the middle part of lower tank, and upper tank is located in upper part compared with lower tank, so upper tank does not directly contact molten steel, and is mainly subjected to molten steel splashing and heat radiation.

[0003] The existing RH refining furnace upper tank refractory structure is as shown in the accompanying drawings Figure 1 As shown, the refractory used for the RH refining furnace upper tank includes working layer brick 1, secondary working layer brick 2, heat preservation layer brick 3 and calcium silicate board 4 arranged in sequence from inside to outside. Each time of masonry needs to be masonry according to the requirements of drawing, firstly, a layer of calcium silicate board 4 is pasted on the inner wall of furnace shell, then heat preservation layer brick 3 is masonry, then secondary working layer brick 2 is masonry, and finally working layer brick 1 is masonry. This method has the following defects: 1. Large masonry workload not only increases the cost of refractory, but also shortens the use efficiency of RH furnace; 2. Because the refractory of each layer of upper tank is a relatively independent brick masonry structure, it is inevitable that through joint or close through joint will appear, which increases the risk of steel penetration; 3. In the process of masonry of upper tank, triangular gap will inevitably appear between adjacent two layers due to different number of bricks required for masonry of different layers, and these gaps need to be filled with dry powder or mud, so that weak link appears, which affects the use effect of upper tank, and further limits the overall service life of upper tank. SUMMARY

[0004] In order to solve the problems in the background art, the utility model discloses a kind of RH refining furnace upper tank masonry structure, including nanometer composite board layer and pouring layer, pouring layer is closed circular ring structure, overall effect is good, reduce the possibility of brick masonry structure through joint, reduce the risk of furnace wall steel penetration, and heat preservation effect is good, service life is long.

[0005] To achieve the above-mentioned purposes, the utility model adopts the following technical solutions:

[0006] A kind of RH refining furnace upper tank masonry structure, including furnace shell, pouring layer prepared by pouring is provided in the furnace shell, a plurality of anchoring members are uniformly distributed in the pouring layer, one end of the anchoring member is welded and connected with the inner wall of furnace shell, and a heat preservation layer is further provided between the inner wall of furnace shell and pouring layer.

[0007] Further, the RH refining furnace upper tank masonry structure, the pouring layer is closed circular ring structure.

[0008] Further, the RH refining furnace upper tank masonry structure, the heat preservation layer is a nano composite board, and the thickness of the nano composite board is 20-40mm.

[0009] Further, the RH refining furnace upper tank masonry structure, the pouring layer comprises a plurality of sub-pouring layers arranged in the axial direction of the RH refining furnace upper tank, and a letter buckle is arranged between adjacent sub-pouring layers.

[0010] Further, the RH refining furnace upper tank masonry structure, the nano composite board is pasted and connected with the inner wall of the furnace shell.

[0011] Compared with the prior art, the RH refining furnace upper tank masonry structure has the advantages that:

[0012] The RH refining furnace upper tank masonry structure disclosed by the utility model has a pouring layer prepared by pouring in the furnace shell, a plurality of anchoring members are uniformly distributed in the pouring layer, one end of the anchoring member is welded and connected with the inner wall of the furnace shell, and a nano composite board is further arranged between the inner wall of the furnace shell and the pouring layer. The nano composite board has extremely small thermal conductivity and good heat preservation effect. Since the whole furnace wall adopts the pouring layer formed by pouring, the overall effect is good, the possibility of joint leakage of the brick masonry structure is greatly reduced, the risk of furnace wall penetration is greatly reduced, and the service life of the upper tank is improved. Since the upper tank adopts the pouring layer formed by pouring the castable, the masonry workload is greatly reduced, which not only reduces the labor intensity of workers, but also shortens the construction period of the upper tank masonry maintenance, thereby improving the operation efficiency of the RH refining furnace. Meanwhile, compared with the brick masonry structure, the pouring layer castable saves refractory material cost and greatly reduces the cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional structure schematic view of the RH refining furnace upper tank refractory structure in the background art;

[0014] Figure 2 is a sectional structure schematic view of the RH refining furnace upper tank masonry structure of the utility model;

[0015] In the above drawings: 1 is a working layer brick, 2 is a secondary working layer brick, 3 is a heat preservation layer brick, 4 is a calcium silicate board, 5 is a pouring layer, 6 is a nano composite board, 7 is an anchoring member, and 8 is a letter buckle. DETAILED DESCRIPTION

[0016] In order to better understand the utility model, the contents of the utility model will be further illustrated below in combination with embodiments, but the contents of the utility model are not limited to the following embodiments.

[0017] In combination with the drawings, Figure 2This invention details a masonry structure for the upper trough of an RH refining furnace. The outermost layer is the furnace shell, and a casting layer 5, prepared by casting, is provided inside the furnace shell. Several anchors 7 are evenly distributed within the casting layer 5, with one end of each anchor welded to the inner wall of the furnace shell. An insulation layer is also provided between the inner wall of the furnace shell and the casting layer 5. Because the entire furnace wall is constructed using a cast-in-place casting layer 5, the overall effect is excellent, significantly reducing the possibility of through-joints in brick masonry and greatly reducing the risk of steel penetration through the furnace wall. It solves the problem of triangular gaps between adjacent brick layers in traditional brick masonry, greatly reducing weak points in the upper trough construction and improving the service life of the upper trough. Since the upper trough uses a cast-in-place casting layer 5, the amount of masonry work is greatly reduced, not only alleviating the labor intensity of workers but also shortening the construction cycle for upper trough construction and maintenance, thereby improving the operating efficiency of the RH refining furnace. Simultaneously, the cost of the cast-in-place casting layer 5 is significantly lower than that of brick masonry, saving on refractory material costs.

[0018] As an optional design, the preferred upper trough masonry structure of the RH refining furnace is a closed ring structure, which has a good overall effect and greatly reduces the possibility of through joints in the brick masonry structure, thus greatly reducing the risk of steel penetration through the furnace wall.

[0019] As an optional design, the preferred upper trough construction structure of the RH refining furnace is a nanocomposite board 6 with a thickness of 20-40mm. The nanocomposite board has a very low thermal conductivity and good insulation effect.

[0020] As an optional design, the preferred masonry structure of the upper trough of the RH refining furnace is that the casting layer 5 includes several sub-casting layers arranged in layers along the axial direction of the upper trough of the RH refining furnace, and letter buckles 8 are provided between adjacent sub-casting layers to improve the stability of the casting layer 5 structure and avoid the formation of through joints.

[0021] As an optional design, the upper trough masonry structure of the RH refining furnace is preferred, in which the nanocomposite plate 6 is bonded to the inner wall of the furnace shell, and the anchor 7 passes through the nanocomposite plate 6. The casting layer 5 is in close contact with the nanocomposite plate 6, thereby improving the overall effect and heat preservation effect of the entire furnace wall.

[0022] The construction process of the upper trough masonry structure of the RH refining furnace of this utility model is as follows:

[0023] First, several anchors 7 are welded to the inner wall of the furnace shell. Then, the nanocomposite plate 6 is bonded to the inner wall of the furnace shell. Finally, multiple layers of sub-casting layers are poured from bottom to top. During pouring, a semi-circular auxiliary support membrane is set at the position corresponding to the letter buckle 8 on the top of the lower sub-casting layer. After the lower sub-casting layer is poured, the auxiliary support membrane is removed. Then, the remaining sub-casting layers are poured in a similar manner from bottom to top. Finally, the construction of the casting layer 5 that matches the shell is completed. Because the entire furnace wall uses the cast-in-place casting layer 5, the overall effect is good, greatly reducing the possibility of through joints in the brick masonry structure, greatly reducing the risk of steel penetration in the furnace wall, solving the problem of triangular gaps between adjacent brick layers in traditional brick masonry structures, greatly reducing weak points in the upper trough masonry, improving the service life of the upper trough, and shortening the masonry cycle to improve the operating efficiency of the RH refining furnace. At the same time, the cost of the casting material of the casting layer 5 is greatly reduced compared with the brick masonry structure, saving refractory material costs.

[0024] The above description is only an application implementation of this utility model, but the protection scope of this utility model is not limited thereto and cannot be used to limit the scope of rights of this utility model. Any equivalent changes made according to the technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. A lining structure for the upper tank of an RH refining furnace, including a furnace shell, characterized in that: The furnace shell contains a casting layer prepared by casting. The casting layer is a closed circular structure. The casting layer includes several sub-casting layers arranged axially along the upper groove of the RH refining furnace. Letter buckles are provided between adjacent sub-casting layers. Several anchors are evenly distributed in the casting layer. One end of the anchors is welded to the inner wall of the furnace shell. An insulation layer is also provided between the inner wall of the furnace shell and the casting layer. The insulation layer is a nanocomposite board and is bonded to the inner wall of the furnace shell.

2. The upper trough construction structure of the RH refining furnace according to claim 1, characterized in that: The thickness of the nanocomposite plate is 20-40 mm.

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