Blast furnace dry slag pit layout structure

Abstract

The present invention relates to a layout structure of a blast furnace dry slag pit, belonging to the technical field of fixed structures. The dry slag pit is arranged under the tapping yard platform, and its layout position does not coincide with the plane projection of the front-of-furnace process facilities; the front-of-furnace process facilities include a main runner, a runner, a slag runner and a swing chute; a slag discharge hole matching the position of the dry slag pit is arranged on the tapping yard platform, and a movable cover plate supporting it is arranged on the slag discharge hole, and the surface of the movable cover plate is flush with the surface of the tapping yard platform. The dry slag pit of the present invention is placed on the floor under the tapping yard platform, which can meet the normal dry slag operation of molten slag without additionally increasing the engineering land outside the tapping yard, saving construction land and making the general layout more flexible. The dry slag pit does not coincide with the plane projection of the front-of-furnace process facilities such as the main runner, the runner, the slag runner and the swing chute, does not affect the normal tapping and slag discharging operations in front of the furnace, and does not affect the normal production operation of the tapping yard scene.

Description

Technical Field

[0001] The present invention belongs to the technical field of fixed structures and relates to a layout structure of a blast furnace dry slag pit. Background Art

[0002] In blast furnace ironmaking, the dry slag pit is an important facility for molten slag treatment in the entire blast furnace system. Its main function is to temporarily recover and treat molten slag at the initial stage of furnace startup and when the water slag water granulation system fails. Especially at present, with the enlargement of blast furnaces, the long life of equipment, and long-term high-temperature and high-pressure operation, it is inevitable that the slag discharge amount increases more and more frequently, and the corresponding area requirement of the dry slag pit also increases accordingly. The floor area of the dry slag pit is 200m 2 ~500m 2 varying.

[0003] In the traditional layout, a large-area dry slag pit is arranged at the edge of the blast furnace tapping yard. The problems existing are as follows: the floor area of the dry slag pit is large, it is difficult to arrange the process general layout, when the produced molten slag is cooled by sprinkling water, the flue gas is not easy to be collected efficiently and conveniently, and the environmental protection performance during the production process is poor.

[0004] At present, there are some problems in the layout of the blast furnace dry slag pit as follows:

[0005] Pollution problems: The layout of the blast furnace dry slag pit may cause environmental pollution, for example, the generated soot, dust, etc.

[0006] Sanitation problems: If the layout of the blast furnace dry slag pit is improper, it may cause sanitation problems, for example, leakage caused by unbalanced water level in the slag pit, etc.

[0007] Safety problems: If the blast furnace dry slag pit is improperly arranged, it may cause potential safety hazards, for example, unstable structure of the dry slag pit, etc.

[0008] Low resource utilization efficiency: If the blast furnace dry slag pit is improperly arranged, it may cause low resource utilization efficiency, for example, low utilization efficiency of the internal space of the dry slag pit, etc.

[0009] Therefore, the layout of the blast furnace dry slag pit needs to consider the above problems to ensure the requirements in terms of safety, sanitation, environmental protection, resource utilization efficiency, etc. For this purpose, we need to study how to improve the utilization rate of the dry slag pit and reduce the floor area of the dry slag pit. Generally, the design scheme of the dry slag pit should consider the following aspects: ① What kind of structural form to adopt to meet the requirements of different working conditions; ② The size of the dry slag pit for installation and maintenance. Summary of the Invention

[0010] In view of this, the purpose of the present invention is to provide a layout structure of a blast furnace dry slag pit to overcome the above deficiencies of the prior art.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A blast furnace dry slag pit layout structure, in which the dry slag pit is arranged under the tapping yard platform, and its layout position does not coincide with the plane projection of the front-of-furnace process facilities; the front-of-furnace process facilities include a main iron runner, an iron runner, a slag runner, and a swing chute; a slag discharge hole matching the position of the dry slag pit is arranged on the tapping yard platform, and a supporting movable cover plate is arranged on the slag discharge hole, and the surface of the movable cover plate is flush with the surface of the tapping yard platform.

[0013] Optionally, the top view of the dry slag pit is rectangular, with three sides closed and one side open.

[0014] Optionally, a movable axial flow fan is arranged on the open side of the dry slag pit.

[0015] Optionally, a plurality of slag discharge holes are arranged.

[0016] Optionally, a detachable movable railing is arranged around the slag discharge hole.

[0017] Optionally, a dust removal point is arranged above the slag discharge hole.

[0018] Optionally, a movable axial flow fan is arranged around the slag discharge hole.

[0019] Optionally, a swing chute is arranged on the tapping yard platform, the swing chute is connected to the residual iron runner and the iron runner, the residual iron runner and the iron runner merge and then are connected to the slag runner, and the slag runner is communicated to the dry slag runner, and the position of the dry slag runner matches that of the dry slag pit.

[0020] Optionally, a crane is arranged on the tapping yard platform, and the walking range of the crane covers the dry slag pit.

[0021] Optionally, the maintenance range of the crane covers the slag discharge hole.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1) The dry slag pit is placed on the floor under the tapping yard platform, which can meet the normal dry slag discharging operation of molten slag without additional engineering land outside the tapping yard, saving construction land and making the general layout more flexible.

[0024] 2) The dry slag pit does not coincide with the plane projection of the front-of-furnace process facilities such as the main iron runner, the iron runner, the slag runner, and the swing chute, and does not affect the normal tapping and slag discharging operations in front of the furnace.

[0025] 3) When the dry slag pit does not handle molten slag, operators and various mobile equipment can freely walk on the heavy cover plate above the dry slag pit, and the setting of the dry slag pit does not affect the normal production operation of the tapping yard.

[0026] 4) When the dry slag pit is used to process molten slag, the dry slag pit under the iron-making yard is a rectangular structure with three sides closed; the axial flow fans around the slag discharge hole and the open end of the dry slag pit block the smoke from the dry slag pit with an air curtain, and cooperate with the top suction at the dust removal point on the roof of the iron-making yard plant to achieve the effect of clean production.

[0027] 5) The crane in the iron-making yard lifts the refractory materials for repairing the dry slag pit and the dry slag after water cooling through the slag discharge hole.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the dry slag pit under the iron-making yard when no slag is treated;

[0031] Figure 2 This is a schematic diagram of the dry slag pit in the iron-making yard when no slag is processed;

[0032] Figure 3 This is a schematic diagram of slag treatment in the dry slag pit under the iron-making yard;

[0033] Figure 4 This is a schematic diagram of the slag treatment in the dry slag pit on the iron-making yard.

[0034] Figure numerals: Item 1 is a dry slag pit, Item 2 is an external transportation road, Item 3 is a movable axial flow fan under the iron-making yard, Item 4 is a movable cover plate on the slag discharge hole, Item 5 is the iron-making yard platform, Item 6 is a crane for the iron-making yard plant, Item 7 is a movable axial flow fan around the slag discharge hole, Item 8 is the slag discharge hole, Item 9 is a detachable movable railing, and Item 10 is a dust removal point on the roof of the iron-making yard plant. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] See also Figures 1 to 4 , which is a blast furnace dry slag pit layout structure. The dry slag pit 1 is arranged on the ground floor under the iron-casting yard platform 5. The dry slag pit 1 does not overlap with the plane projection of the furnace front process facilities such as the main iron ditch, iron ditch, slag ditch and swing chute. The arrangement of the dry slag pit 1 does not increase the engineering land outside the iron-casting yard, and can meet the normal slag dry slag discharge operation, saving construction land, and making the general layout more flexible; the plane of the dry slag pit 1 is rectangular, with three sides closed and one end open to the whole plant road (external transportation road 2), and the open end can be partially closed according to the specific transportation needs or slag cleaning needs; the three closed sides of the dry slag pit 1 reach the bottom surface of the iron-casting yard platform 5; the upper platform 5 of the iron-casting yard on the dry slag pit 1 is provided There is a slag discharge hole 8 in the dry slag pit 1. The slag discharge hole 8 can be made as large as possible according to the stress condition of the structure, and multiple slag discharge holes can also be set; the slag discharge hole 8 is provided with a movable cover plate 4 matched therewith, and the top surface of the movable cover plate 4 is flush with the surface of the iron-making yard platform 5. The movable cover plate 4 is a heavy-duty cover plate that can withstand the walking load of mobile equipment such as a forklift; the slag discharge hole 8 is located within the maintenance range of the iron-making yard plant crane 6; the iron-making yard platform 5 around the slag discharge hole 8 is provided with a detachable movable railing 9; a dust removal point 10 on the roof of the iron-making yard plant is provided above the slag discharge hole 8; a movable axial flow fan 7 is provided on the iron-making yard platform 5 around the slag discharge hole 8; a movable axial flow fan 3 is provided at the open end of the dry slag pit.

[0039] When the dry slag pit 1 is not processing molten slag, the movable cover plate 4 on the slag discharge hole 8 of the dry slag pit 1 is placed on the slag discharge hole 8, the movable railings 9 around the slag discharge hole 8 are removed, and the movable axial flow fans 7 around the slag discharge hole 8 are evacuated from the scene. Operators and various mobile equipment can walk freely on the heavy cover plate 4 above the dry slag pit 1, and the setting of the dry slag pit 1 does not affect the normal production operation of the iron-making field.

[0040] When the dry slag pit 1 processes molten slag, the movable cover plate 4 on the slag discharge hole 8 of the dry slag pit 1 is removed to other areas, the movable railing 9 around the slag discharge hole 8 is installed in place, the movable axial flow fan 7 is moved to the periphery of the slag discharge hole 8, the movable axial flow fan 3 is moved to the open end of the dry slag pit 1, and the dust removal point 10 on the roof of the hot metal yard workshop is opened. The gas curtain of the flue gas in the dry slag pit is blocked by the movable axial flow fan 3 and the movable axial flow fan 7, and combined with the top suction of the dust removal point 10 on the roof of the hot metal yard workshop, the effect of clean production is achieved. The crane 6 in the hot metal yard workshop hoists the refractory materials for repairing the dry slag pit 1 and the dry slag after sprinkling cooling through the slag discharge hole 8.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A layout structure of a blast furnace dry slag pit, Characterized in that: The dry slag pit is arranged under the tapping yard platform, and its layout position does not coincide with the plane projection of the front-of-furnace process facilities; the front-of-furnace process facilities include a main iron runner, branch iron runners, a slag runner, and a swing chute; a slag discharge hole matching the position of the dry slag pit is arranged on the tapping yard platform, and a movable cover plate supporting it is arranged on the slag discharge hole, and the surface of the movable cover plate is flush with the surface of the tapping yard platform.

2. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: The top view of the dry slag pit is rectangular, with three sides closed and one side open.

3. The layout structure of the blast furnace dry slag pit according to claim 2, Characterized in that: A movable axial flow fan is arranged on the open side of the dry slag pit; the three closed sides of the dry slag pit abut against the lower bottom surface of the tapping yard platform slab.

4. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: A plurality of slag discharge holes are arranged.

5. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: Detachable movable railings are arranged around the slag discharge hole.

6. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: A dust removal point is arranged above the slag discharge hole.

7. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: Movable axial flow fans are arranged around the slag discharge hole.

8. The layout structure of the blast furnace dry slag pit according to claim 1, Characterized in that: A swing chute is arranged on the tapping yard platform, the swing chute is connected to the residual iron runner and the branch iron runners, the residual iron runner and the branch iron runners merge and then are connected to the slag runner, the slag runner is communicated to the dry slag runner, and the position of the dry slag runner matches that of the dry slag pit.

9. The layout structure of the blast furnace dry slag pit according to claim 8, Characterized in that: A crane is arranged on the tapping yard platform, and the walking range of the crane covers the dry slag pit.

10. The layout structure of the blast furnace dry slag pit according to claim 9, Characterized in that: The maintenance range of the crane covers the slag discharge hole.

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