Primary and secondary cover plate of blast furnace casting house

Abstract

The utility model belongs to the technical field of blast furnace smelting, and particularly relates to a primary and secondary cover plate for a blast furnace casting house, which is characterized by comprising a primary plate and a secondary plate and structurally comprising an upper cover plate, a plate seat, a hoisting box, a heat insulation layer, castable and anchoring nails, a thermal insulation layer and a castable are arranged in the plate seat from top to bottom, and an anchoring nail is arranged in the castable; the two sides of the upper cover plate of the mother plate symmetrically shrink inwards in the laying length direction to form seam allowances; the upper cover plates of the daughter boards symmetrically extend outwards along the two sides of the laying length direction; the daughter board and the mother board are adjacently arranged, an upper cover plate extending outwards on the daughter board is matched with a spigot on the adjacent mother board, and a staggered lap joint sealing structure is formed in the laying direction of the daughter board on a branch ditch of a blast furnace casting house. The staggered tooth structure has the advantages that the staggered tooth structure is formed after the adjacent mother plate and daughter plate are spliced, and a novel, reasonable, convenient and effective solution is provided for smoke dust treatment of a blast furnace casting house.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace smelting, and in particular relates to a mother-and-child cover plate for a blast furnace iron-making site. Background Art

[0002] In the iron and steel metallurgical production, a large amount of smoke and dust will be produced during the iron-making process of the blast furnace, which will pollute the environment around the iron-making site and affect the health of front-line operators. Based on this situation, the main ditch of the iron-making site has been equipped with dust hoods or fully enclosed dust removal bins, and the dust removal effect of the main ditch has been significantly improved. However, in the branch iron ditch and slag ditch area, the dust removal method of the main ditch cannot be directly used due to factors such as the flatness of the iron-making site. At present, traditional cover plates are generally used to remove dust in the branch iron ditch and slag ditch area of ​​the iron-making site. The traditional cover plate not only has poor thermal insulation effect, but also has a gap of about 20mm between the cover plates, and some smoke and dust still float out of the gap. With the improvement of technology, some steel companies have sealed the gaps between traditional cover plates with refractory fiber felt or other refractory materials. Although this has solved the sealing problem and improved the environment around the iron-making site, the cover plate needs to be moved for maintenance of the slag and iron ditch, and the sealing material between the cover plate gaps must be removed, which increases the workload of maintenance. Therefore, many steel companies are troubled by the problem that the cover can be effectively sealed and can be moved quickly and conveniently during maintenance.

[0003] The Chinese utility model patent with application number 202320617191.0 discloses an environmentally friendly and long-life blast furnace slag iron trench cover, which includes a plurality of cover plate monomers spliced ​​together, the cover plate monomers include a cover plate shell, the bottom of the cover plate shell is provided with a long strip opening, the inner cavity of the cover plate shell is provided with a grid-like rib plate, the surface of the grid-like rib plate and the inner surface of the top of the cover plate shell are provided with anchor nails, the space separated by the grid-like rib plate is filled with refractory material, a support net is provided at the long strip opening, and heat insulation cotton is provided between the support net and the refractory material, and a groove is provided on the upper surface of the joint of two adjacent cover plate monomers, and a sealing strip is provided in the groove. The utility model seals between the two cover plates through a sealing strip to reduce smoke and dust spillage and achieve environmental protection, but during the maintenance process, the sealing strip is easily displaced or lost, and the long-term sealing effect cannot be guaranteed. Utility Model Content

[0004] The utility model aims to provide a mother-and-child cover plate for a blast furnace iron-making yard, which overcomes the shortcomings of the prior art, forms a staggered tooth structure after adjacent mother plates and child plates are spliced, and plays a sealing role by relying on the staggered teeth at the connection, meets the application needs of the iron-making yard, can ensure safety and environmental protection during use, and the slag and iron groove of the blast furnace iron-making yard are tightly sealed; and can realize rapid movement and replacement of the cover plate during maintenance, thereby achieving the effect of convenient maintenance.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A mother-and-child cover plate for a blast furnace iron-casting yard, characterized in that it comprises a mother plate and a child plate, and the structure comprises an upper cover plate, a plate seat, a hoisting box, a thermal insulation layer, a castable and anchor nails. The top of the plate seat welded by channel steel is connected to the upper cover plate, and the plate seat is provided with a thermal insulation layer and a castable from top to bottom, and the castable is provided with anchor nails. The plate seat is provided with 2 or 4 hoisting boxes, and the hoisting box is opened at the upper cover plate, and the opening is provided with round steel for tying a steel wire rope; the upper cover plate of the mother plate is symmetrically inwardly contracted on both sides along the laying length direction to form a stop; the upper cover plate of the child plate is symmetrically outwardly extended on both sides along the laying length direction; the child plate and the mother plate are arranged adjacent to each other, and the outwardly extended upper cover plate on the child plate matches the stop on the adjacent mother plate, forming a staggered overlapping sealing structure along its laying direction on the branch ditch of the blast furnace iron-casting yard.

[0007] Furthermore, the sub-plate and the main plate are respectively steel components of standard sizes.

[0008] Furthermore, the hoisting box is a box body with an open top, and a notch matching the round steel is provided in the center of the top. After the round steel is welded to the notch, the round steel is completely sunk into the hoisting box, and the upper surface of the hoisting box is flush.

[0009] Furthermore, the thermal insulation layer is ceramic fiber wool, glass wool or rock wool.

[0010] Furthermore, the thickness of the castable is not less than 30 mm.

[0011] Furthermore, the overlap width of the stop is not less than 20 mm.

[0012] Furthermore, a graphite layer is pasted on the bottom of the upper cover plate of the externally protruding part, and the thickness of the graphite layer is not less than 3 mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1) Adjacent sub-plates and mother plates are spliced ​​to form a staggered structure, which relies on the staggered teeth at the connection to play a sealing role and meet the application needs of the iron-making field. The combined structure of the two insulation materials has excellent insulation effect while ensuring strength, and does not increase costs.

[0015] 2) It can ensure safety and environmental protection during use, and the slag and iron groove of the blast furnace iron-making yard are tightly sealed; it can also achieve rapid movement and replacement of the cover during maintenance, achieving the effect of convenient maintenance, and providing a new, reasonable, convenient and effective solution for the smoke control of the blast furnace iron-making yard. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the splicing of the daughter board B and the mother board A in the embodiment of the utility model;

[0017] Figure 2This is a schematic diagram of the motherboard structure in the embodiment of the utility model;

[0018] Figure 3 yes Figure 2 Sectional view along CC line;

[0019] Figure 4 This is a schematic diagram of the structure of the daughter board in the embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the hoisting box in the embodiment of the utility model.

[0021] In the figure: 1-upper cover plate, 2-plate seat, 3-hoisting box, 4-insulation layer, 5-casting material, 6-anchor nails, 7-round steel, 8-notch, 9-external protrusion part, 10-graphite layer. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0024] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0025] See Figure 1-Figure 3, is a schematic structural diagram of an embodiment of a mother-and-child cover plate of a blast furnace iron-casting yard of the utility model, comprising a mother plate A and a child plate B, both of which structures include an upper cover plate 1, a plate seat 2, a hoisting box 3, an insulation layer 4, a castable 5 and an anchor nail 6. The plate seat 2, which is welded by a channel steel, is connected to the upper cover plate 1 at the top, and the plate seat 2 is provided with an insulation layer 4 and a castable 5 from top to bottom, and the castable 5 is provided with an anchor nail 6. Four hoisting boxes 3 are provided in the plate seat 2, and the hoisting box 3 is opened at the upper cover plate 1, and a round steel 7 for tying a steel wire rope is provided in the opening; the upper cover plate of the mother plate A is symmetrically inwardly contracted on both sides along the laying length direction to form a stop; the upper cover plate of the child plate B is symmetrically outwardly extended on both sides along the laying length direction; when the child plate B and the mother plate A are arranged adjacent to each other, the outwardly extended upper cover plate on the child plate B matches the stop on the adjacent mother plate A, and a staggered overlapping sealing structure is formed along the laying direction on the branch ditch of the blast furnace iron-casting yard.

[0026] The overlap width of the stopper is not less than 20mm. A graphite layer 10 is pasted on the bottom of the upper cover plate 1 of the external probe part 9, and the thickness of the graphite layer is not less than 3mm, so as to improve the sealing performance. In terms of thermal insulation, the inside of the plate seat 2 is filled with ceramic fiber wool, and the bottom of the plate seat 2 is filled with castables, which combine two thermal insulation materials to ensure good thermal insulation effect. In terms of sealing, the cover plates are staggered at the joints without gaps.

[0027] See Figure 4 , is a schematic diagram of the sub-board structure in an embodiment of the utility model, where the sub-board B is configured with two hanging boxes 3.

[0028] See Figure 5 The hoisting box 3 is a box body with an open top, and a notch 8 matching the round steel 7 is arranged in the center of the top. After the round steel 7 is welded with the notch 8, the round steel 7 is completely sunk into the hoisting box 3, and the upper surface of the hoisting box 3 is flush, ensuring that the surface of the upper cover plate 1 is flat and does not affect the stacking and storage of the cover plate. When the cover plate needs to be hoisted, a steel wire rope is passed through the hoisting box 3, and the round steel is used as a lifting fulcrum.

[0029] In the embodiment, the sub-plate B and the mother plate A of the utility model are both standard-sized steel components, which have the advantage that they can be used and installed at will without considering the size matching problem, so that the disassembly and assembly efficiency is high and the maintenance workload is not increased. The specific size of the cover plate must be consistent with the width of the blast furnace slag and the iron ditch. The insulation layer 4 is any one of ceramic fiber wool, glass wool or rock wool, and ceramic fiber wool is preferred. In order to ensure the durability, the thickness of the castable 5 is not less than 30mm.

[0030] During construction, the cover plates should be installed along the length of the branch trench of the blast furnace iron-making yard. During normal working conditions, all cover plates are closed. When inspecting the slag trench and iron trench, it is only necessary to use a crane to move the corresponding sub-plates above the slag trench and iron trench.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mother-and-child cover plate for a blast furnace casting house, characterized in that: It includes a mother plate and a sub-plate, and the structure includes an upper cover plate, a plate seat, a lifting box, an insulation layer, a castable and anchor nails. The top of the plate seat welded by channel steel is connected to the upper cover plate, and the plate seat is provided with an insulation layer and castable from top to bottom, and the castable is provided with anchor nails. There are 2 or 4 lifting boxes in the plate seat, and the lifting box is opened at the upper cover plate, and round steel for tying steel wire ropes is provided in the opening; the upper cover plate of the mother plate is symmetrically retracted on both sides along the laying length direction to form a stop; the upper cover plate of the sub-plate is symmetrically extended outward on both sides along the laying length direction; the sub-plate and the mother plate are arranged adjacent to each other, and the outward-extending upper cover plate on the sub-plate matches the stop on the adjacent mother plate, and a staggered overlap sealing structure is formed along its laying direction on the branch ditch of the blast furnace iron-making yard.

2. The blast furnace casting house mother and child cover according to claim 1, characterized in that: The sub-plate and the main plate are respectively steel components of standard sizes.

3. The blast furnace casting house mother and child cover according to claim 1, characterized in that: The hoisting box is a box body with an open top, and a notch matching the round steel is provided in the center of the top. After the round steel is welded to the notch, the round steel is completely sunk into the hoisting box, and the upper surface of the hoisting box is flush.

4. The blast furnace casting house mother and child cover according to claim 1, characterized in that: The thermal insulation layer is ceramic fiber wool, glass wool or rock wool.

5. The blast furnace casting house mother and child cover according to claim 1, characterized in that: The thickness of the castable is not less than 30 mm.

6. The blast furnace casting house mother and child cover according to claim 1, characterized in that: The overlapping width of the stop is not less than 20 mm.

7. The mother-and-child cover plate for a blast furnace casting house according to claim 1, characterized in that: A graphite layer is pasted on the bottom of the upper cover plate of the externally protruding part, and the thickness of the graphite layer is not less than 3 mm.

Images