A casting mold for preparing a burner block for a steel rolling heating furnace

Abstract

The utility model discloses a kind of pouring mould for preparing rolling steel heating furnace burner brick, mould is used to from outside to inside stretch into the position of the burner of rolling steel heating furnace, and then make pouring material from the inside of rolling steel heating furnace pours, and then form burner;The pouring mould of the utility model is simple in structure, and the error of the containing area of regenerative chamber blocking brick and honeycomb body is small, and then the heat storage capacity is enhanced in the later use process, the spacing between each nozzle is accurate in the pouring process, and it can be used directly without further correction.

Description

Technical Field

[0001] This utility model belongs to the field of burner preparation for steel rolling heating furnaces, and particularly relates to a casting mold for preparing burner bricks for steel rolling heating furnaces. Background Technology

[0002] The steel rolling heating furnace is a heating device used before steel billet rolling. The combustion medium is usually coal gas, with air as the combustion aid. The burners inside the furnace are arranged in an alternating coal gas-air configuration, constructed with explosion-proof, quick-drying castable refractory. A heat storage tank is connected after the burners, containing heat-recovering baffle bricks and honeycomb structures to recover heat energy and reduce energy consumption. During furnace operation, large temperature fluctuations and thermal expansion and contraction cause cracks and spalling in the burner refractory. During major overhauls of the steel rolling heating furnace, the burners are removed and recast.

[0003] The existing technology is difficult to use for formwork during the burner casting process due to the complexity of the burner structure. The formwork is assembled by a carpentry team, which takes about 20 hours and 4 people. In addition, due to the fluidity of the refractory castable, the angle deviation occurs during grouting due to the influence of gravity, and the expected effect is not achieved after drying and molding. Utility Model Content

[0004] The purpose of this invention is to provide a casting mold for preparing burner bricks for steel rolling heating furnaces, in order to solve the problems of complex burner structure leading to difficulty in formwork support, and angle deviation caused by gravity during grouting due to the fluidity of refractory castable, resulting in the failure to achieve the expected effect after drying and molding.

[0005] The present invention adopts the following technical solution: a casting mold for preparing burner bricks for steel rolling heating furnace, the mold being used to extend from the outside to the inside of the burner position of the steel rolling heating furnace, thereby allowing the casting material to be cast from the inside of the steel rolling heating furnace, thereby forming the burner; The mold includes: The support base is vertically positioned and is block-shaped; it is located away from the steel rolling heating furnace. The heat storage chamber baffle mold is located inside the support base and is integrally connected to the support base; The nozzle mold is cylindrical and located near the steel rolling heating furnace; the nozzle mold is located inside the heat storage chamber baffle mold and is integrally connected with the heat storage chamber baffle mold; the direction of the nozzle mold is perpendicular to the plane of the heat storage chamber baffle mold.

[0006] The beneficial effects of this utility model are: The casting mold of this utility model has a simple structure and small error in the accommodating area of ​​the heat storage chamber baffle brick and honeycomb body, thereby enhancing the heat storage capacity in the later use. The spacing between each nozzle is accurate during the casting process, and no further correction is required in the later stage, so it can be used directly. This invention significantly reduces the requirements for workers because the molds are all prefabricated in advance, eliminating the need for temporary construction at the pouring gate. This reduces pouring time while also improving the dimensional accuracy of the burners. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model.

[0008] Among them: 10, support base; 11, heat storage chamber baffle mold; 12, nozzle mold; 13, groove. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0011] This utility model discloses a casting mold for preparing burner bricks for steel rolling heating furnaces, such as... Figure 1 As shown, the mold is used to extend from the outside to the inside of the burner position in the steel rolling heating furnace, so that the casting material is poured from the inside of the steel rolling heating furnace to form the burner.

[0012] The mold includes: a support base 10, a heat storage chamber baffle mold 11, and a nozzle mold 12.

[0013] The support base 10 is set vertically and is block-shaped; the support base 10 is set away from the steel rolling heating furnace.

[0014] The heat storage chamber baffle mold 11 is located inside the support base 10 and is integrally connected with the support base 10.

[0015] The nozzle mold 12 is columnar, and the nozzle mold 12 is arranged close to the steel rolling heating furnace; the nozzle mold 12 is located on the inner side of the regenerator brick retaining mold 11 and is integrally connected with the regenerator brick retaining mold 11; the extending direction of the nozzle mold 12 is perpendicular to the plane where the regenerator brick retaining mold 11 is located.

[0016] The support base 10 is a cube or a cuboid, there are four regenerator brick retaining molds 11, which are respectively arranged at the corners of the support base 10; the edges of the four regenerator brick retaining molds 11 shrink from outside to inside, so that the periphery of the four regenerator brick retaining molds 11 after cooperating with each other forms a square-shaped accommodating area, and at the same time, a cross-shaped groove 13 is formed between the four regenerator brick retaining molds 11. The groove 13 is for pouring material to enter, so that a cross-shaped partition frame is formed after pouring is completed; the accommodating area is for pouring material to enter, so that a square-shaped frame is formed after pouring is completed, and the space between the frame and the partition frame is for accommodating regenerator retaining bricks.

[0017] A plurality of nozzle molds 12 are provided.

[0018] The method for pouring burner bricks of a steel rolling heating furnace of the present utility model is as follows: Step 1: Break the cracked and spalled burner to form a pouring opening; Step 2: Place the pouring mold into the pouring opening from the outer side of the steel rolling heating furnace, and ensure that the nozzle mold 12 is placed toward the inner side of the steel rolling heating furnace when placing the mold; Step 3: Pour into the pouring opening from the inner side of the steel rolling heating furnace to obtain the frame and the partition frame; Step 4: Break the pouring mold; Step 5: Lay regenerator retaining bricks in the frame and the partition frame, and lay honeycomb bodies on the outer side of the regenerator retaining bricks, thereby obtaining a new burner. Example

[0019] In the burner pouring process of a certain steel rolling mill, since each burner is composed of 20 small nozzles and 4 brick retaining frames, such a complex burner structure leads to high difficulty in formwork supporting. The formwork is spliced by a carpentry team, with a working time of about 20h*4 people. Moreover, due to the fluidity of refractory castable, angular deviation occurs under the influence of gravity during grouting, and the expected effect cannot be achieved after drying and molding.

[0020] Foam is used to make the pouring mold, and pouring is carried out by using the pouring mold, and the pouring steps are as follows: By measuring the burner orifice size, nozzle size, regenerator baffle brick size and angle, a solid foam casting mold of the same size is cut out at a 1:1 scale. After the furnace is shut down, the old burner orifice is broken to form a casting port. The casting mold is placed in the casting port, and refractory material is poured into the gap between the casting port and the mold from the inside of the steel rolling heating furnace. The gap is then sealed with a wooden board of the same size. After the slurry solidifies, a frame and partition are formed. The casting mold is then removed. Regenerator baffle bricks are laid inside the frame and partition, and honeycomb structure is laid on the outside of the regenerator baffle bricks to obtain a new burner.

[0021] The pouring method in this embodiment is simple and greatly improves the work efficiency of personnel, reducing the formwork support time from 20 hours * 4 people to 6 hours * 1 person.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A casting mold for preparing burner bricks for steel rolling heating furnaces, characterized in that, The mold is used at the position of the burner extending from the outside to the inside of the steel rolling heating furnace, so that the pouring material is poured from the inside of the steel rolling heating furnace to form the burner; The mold comprises: a support base (10), which is vertically arranged and block-shaped; arranged away from the steel rolling heating furnace; a regenerator brick stop mold (11), located inside the support base (10) and integrally connected with the support base (10); a nozzle mold (12), which is column-shaped and arranged close to the steel rolling heating furnace; the nozzle mold (12) is located inside the regenerator brick stop mold (11) and integrally connected with the regenerator brick stop mold (11); the extending direction of the nozzle mold (12) is perpendicular to the plane where the regenerator brick stop mold (11) is located.

2. The casting mold for preparing burner bricks for steel rolling heating furnaces according to claim 1, characterized in that, The support base (10) is a cube or a cuboid, four regenerator brick stop molds (11) are provided and respectively located at the corners of the support base (10); the edges of the four regenerator brick stop molds (11) shrink from the outside to the inside, so that the periphery of the four regenerator brick stop molds (11) after cooperating with each other forms a square-shaped accommodating area, and a cross-shaped groove (13) is formed between the four regenerator brick stop molds (11), the groove (13) is for the pouring material to enter, so that a cross-shaped separating frame is formed after pouring is completed, the accommodating area is for the pouring material to enter, so that a square-shaped frame is formed after pouring is completed, and a space for accommodating regenerator stop bricks is formed between the frame and the separating frame.

3. The casting mold for preparing burner bricks for steel rolling heating furnaces according to claim 1, characterized in that, A plurality of the nozzle molds (12) are provided.

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