Electric furnace water-cooling furnace cover structure facilitating lining maintenance

Abstract

The utility model relates to the field of metal smelting and the field of unshaped refractory materials, in particular to an electric furnace water-cooling furnace cover structure facilitating lining maintenance, which is characterized in that a plurality of rows of pouring holes penetrating into a hearth are reserved at the top of a cover plate of a furnace cover, and a space is reserved between every two adjacent pouring holes; the plurality of pouring holes form a pouring channel for online maintenance of the lining; the electric furnace water-cooling furnace cover structure facilitating lining maintenance is further provided with a template located at the bottom of the furnace cover, and a space used for pouring the lining is formed between the template and the furnace cover. The castable can be used for construction during on-line maintenance, and the refractory castable lining after on-line maintenance can achieve the same quality and service life as a lining material during new construction of a project; by adopting the design structure provided by the utility model, the disassembly of the cover plate of the water-cooled furnace cover is avoided, the on-line pouring maintenance of the refractory lining of the furnace cover is realized, the construction is convenient and fast, the construction period is short, and the construction quality is good.

Description

Technical Field

[0001] The utility model belongs to the field of metal smelting and the technical field of amorphous refractory materials, and in particular relates to a water-cooled furnace cover structure of an electric furnace which is convenient for lining maintenance. Background Art

[0002] Electric furnaces are important equipment in high-temperature industries, especially in the metal smelting industry, where electric furnaces are key equipment for producing products; electric furnace covers are divided into dry-type hanging covers and water-cooled covers; dry-type covers tend to be replaced by water-cooled covers due to their poor sealing and relatively short life; water-cooled covers are increasingly favored by manufacturers due to their good sealing, good production site operating conditions and long service life. Many manufacturers have replaced their original dry-type hanging covers with water-cooled covers.

[0003] The water-cooled furnace cover plate uses double-layer steel plates as the skeleton, and the middle of the steel plates on both sides is made into grids for water cooling; or it uses single-layer steel plates and steel sections as the skeleton, and the lower part of the steel plates is made into water-cooling coils; at the bottom of the water-cooled furnace cover steel cover plate, amorphous refractory materials are used to cast a refractory lining, which is connected to the furnace cover plate through metal anchors; the refractory lining blocks the high-temperature flue gas and arc heat radiation in the electric furnace, and protects the furnace cover plate.

[0004] The refractory lining of the furnace cover must not only withstand the high temperature in the furnace, but also resist slag erosion; therefore, the life of the refractory lining of the furnace cover determines the overhaul period of the furnace cover.

[0005] When overhauling the existing water-cooled furnace cover, refractory castables cannot be used because the refractory lining is at the bottom and the cover is at the top. Only refractory coatings or spray coatings can be used. However, the service life of coatings and spray coatings is less than 1 / 5 of the service life of refractory castables. In order to obtain a long service life, the furnace cover can only be removed as a whole and turned over and placed on the workshop platform before refractory castables can be constructed. The removal of the furnace cover is labor-intensive and time-consuming, and some production plants are not designed to take into account the removal and replacement of the furnace cover, so it is actually impossible to completely remove it. Summary of the invention

[0006] The purpose of the utility model is to provide an electric furnace water-cooled furnace cover structure that is easy to repair the lining, so that it can overcome the defect that the existing electric furnace water-cooled furnace cover cannot be repaired using refractory castables, and solve the construction difficulties when the water-cooled furnace cover is repaired using refractory castables.

[0007] The utility model adopts the following technical solutions to achieve the above purpose:

[0008] A water-cooled furnace cover structure for an electric furnace that is convenient for lining maintenance, wherein a plurality of rows of pouring holes penetrating into the interior of a furnace are reserved on the top of the furnace cover plate, with a spacing between two adjacent pouring holes; the plurality of pouring holes form a pouring channel for online maintenance of the lining; the water-cooled furnace cover structure for an electric furnace that is convenient for lining maintenance also has a template located at the bottom of the furnace cover, and a space for pouring the lining is formed between the template and the furnace cover.

[0009] The shape of the pouring hole is circular or square.

[0010] The utility model provides an electric furnace water-cooled furnace cover structure that is convenient for lining maintenance. The above technical solution is adopted to solve the problem that refractory castables cannot be used for online construction when the lining of the electric furnace water-cooled furnace cover is repaired, and the problem of adding materials and vibrating when the refractory castables are used for online maintenance on the top of the furnace water-cooled furnace cover; and the refractory castable lining after online maintenance can achieve the same quality and life as the lining material during new construction of the project; the design structure provided by the utility model avoids the removal of the furnace cover plate, and the construction is convenient, the construction period is short, and the construction quality is good; during maintenance, the template is supported at the bottom of the furnace cover, and then the refractory castable is poured into the top pouring hole, and the vibrating rod is used to vibrate and shape it. This design can realize the online maintenance of the lining of the electric furnace water-cooled furnace cover using refractory castables, eliminating the work of disassembling and assembling the furnace cover plate; the temperature increase and the reduction of heat dissipation caused by the reduction of the total area of ​​the water-cooled area can be solved by increasing the flow rate of water in the water-cooled channel or the water-cooled coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a schematic diagram of the pouring hole arrangement of the utility model.

[0013] In the figure: 1-furnace cover plate, 2-pouring hole, 3-refractory castable lining, 4-construction template. DETAILED DESCRIPTION

[0014] The utility model is described in detail with reference to the accompanying drawings and specific embodiments:

[0015] like Figure 1 , Figure 2As shown, an electric furnace water-cooled furnace cover structure that is convenient for lining maintenance, multiple rows of multiple pouring holes 2 that penetrate into the interior of the furnace are reserved on the top of the furnace cover plate 1, and there is a spacing between two adjacent pouring holes 2; the arrangement spacing can be adjusted according to the installation situation of the upper equipment of the electric furnace water-cooled furnace cover plate, and can be arranged equidistantly or unequally; the multiple pouring holes 2 form a pouring channel for online maintenance of the lining; the electric furnace water-cooled furnace cover structure that is convenient for lining maintenance also has a template 4 located at the bottom of the furnace cover, and a space for pouring the lining 3 is formed between the template and the furnace cover.

[0016] The shape of the pouring hole 2 is circular or square.

[0017] During online maintenance, the template 4 is set up at the bottom, and then the refractory castable 3 is poured into the top pouring hole 2. The vibrating rod also penetrates into the lining layer from the top pouring hole to vibrate, and the refractory lining of the furnace cover is formed. This design can conveniently cast the refractory lining directly from the top pouring hole, realizing online maintenance of the water-cooled furnace cover lining.

Claims

1. A water-cooled furnace cover structure for an electric furnace that facilitates lining maintenance, characterized in that: A plurality of rows of pouring holes penetrating into the furnace are reserved on the top of the furnace cover plate, with a spacing between two adjacent pouring holes; the plurality of pouring holes form a pouring channel for online maintenance of the lining; the water-cooled furnace cover structure of the electric furnace that is convenient for lining maintenance also has a template located at the bottom of the furnace cover, and a space for pouring the lining is formed between the template and the furnace cover.

2. The water-cooled furnace cover structure of an electric furnace that is convenient for lining maintenance as claimed in claim 1, characterized in that: The shape of the pouring hole is round or square.

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