A slag ditch retaining wall structure for blast furnace iron-making site

Abstract

The invention discloses a slag ditch retaining wall structure of a blast furnace iron-casting yard, wherein retaining wall structures are fixedly arranged on both sides of a steel groove of the slag ditch, the retaining wall structure comprises a base wall and a support frame, the base wall and the support frame are located on both sides of the steel groove of the slag ditch, and the support frame of the steel structure is fixed on the upper part of the base wall, the base wall is a heat-resistant concrete base wall, the lower surface of the support frame is tightly welded to the steel bars reserved at the connection between the base wall, and secondary pouring of high-temperature resistant concrete and the base wall of the lower high-temperature resistant reinforced concrete are performed to form a whole, the upper surface elevation of the support frame is at the same elevation as the surface elevation of the iron-casting yard, the invention can meet the requirements of the rolling of the excavator crawler during the disintegration and pouring construction of the blast furnace slag ditch, and can resist the deformation caused by the radiant heat of the slag water, the support frame can be manufactured before construction, and the support structure can be installed after the construction of the base wall is completed, thereby saving 50% of the construction time.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical equipment, and in particular relates to a slag ditch retaining wall structure for a blast furnace tapping site. Background Art

[0002] The slag ditch in the blast furnace iron-casting yard is a ditch for discharging molten slag. The existing blast furnace iron-casting yard platform is an open structure. In order to prevent the molten slag from overflowing from the ditch and generating smoke and dust when the blast furnace is tapping iron, retaining walls are now made on both sides of the slag ditch in large blast furnaces, and cover plates are paved on the upper part of the retaining walls. Since the cover plates are installed on the upper part of the retaining walls on both sides of the slag ditch, a closed space is formed. The radiant heat generated by the slag liquid with a temperature of more than 1490°C during iron tapping has a thermal erosion effect on the retaining wall and the cover plate. At the same time, when the slag ditch is dismantled and poured, the excavator will walk on the retaining wall, destroying the overall structural strength of the retaining wall.

[0003] Based on the above factors, a slag ditch retaining wall structure is specially designed for the blast furnace iron-making yard. On both sides of the steel groove of the slag ditch, it can prevent the molten slag from overflowing from the ditch body, prevent the generation of smoke and dust, and resist the heat radiation generated by the slag molten during iron tapping. When the slag ditch is dismantled and poured, the excavator can walk on the retaining wall without destroying the overall structural strength of the retaining wall. Summary of the invention

[0004] The object of the present invention is to provide a slag ditch retaining wall structure for a blast furnace iron-making yard to solve the problems raised in the above-mentioned background technology.

[0005] The object of the present invention is achieved through the following technical solutions: a slag ditch retaining wall structure of a blast furnace iron-making yard, comprising a slag ditch steel groove, retaining wall structures are fixedly arranged on both sides of the slag ditch steel groove, the retaining wall structure comprises a base wall and a supporting frame, the base wall and the supporting frame are located on both sides of the slag ditch steel groove, and the supporting frame of the steel structure is fixed on the upper part of the base wall;

[0006] The foundation wall is a heat-resistant concrete foundation wall, the lower surface of the support frame is tightly welded to the steel bars reserved at the connection of the foundation wall, and the secondary pouring of high-temperature resistant concrete and the foundation wall of the lower high-temperature resistant reinforced concrete form a whole;

[0007] The upper surface elevation of the support frame is at the same elevation as the surface elevation of the iron-casting yard.

[0008] Furthermore, the support frame is a steel structure support frame, which is composed of a plurality of evenly distributed trough structures welded by steel plates.

[0009] Furthermore, the support frame is composed of a plurality of trough-shaped body structures, and each trough-shaped body structure is arranged in a stepped manner from low to high.

[0010] Furthermore, the trough-shaped body structure is built with a plurality of independent trough-shaped bodies, each of which is hollow inside, and the interior of the trough-shaped body structure is filled with heat-resistant concrete.

[0011] Furthermore, a heat radiation protection layer is provided on one side of the inner wall of the support frame relative to the steel groove of the slag ditch, and the heat radiation protection layer is a concrete spraying structure outside the anchor.

[0012] Furthermore, the anchor external sprayed concrete structure is fixed to the side facade steel plate of the support frame by welding, and the anchor external sprayed concrete structure includes anchor nails, which are fixed to the side facade steel plate of the support frame, and refractory material is sprayed on the anchor nails.

[0013] Furthermore, a blocking plate is fixedly arranged on the upper surface of the support frame. The blocking plate is a steel plate structure and is fixedly connected to the upper surface of the support frame by welding or bolts.

[0014] Furthermore, a cover plate is laid on the support frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The retaining wall structure of the present invention is on both sides of the groove of the slag iron ditch steel structure, and the lower part is a cast high-temperature resistant reinforced concrete foundation wall. The lower surface is tightly welded to the steel bars reserved on the upper part of the cast high-temperature resistant reinforced concrete wall, and the high-temperature resistant concrete is cast for the second time to form a whole with the lower high-temperature resistant reinforced concrete foundation wall. On both sides of the steel groove of the slag iron ditch, the lower part is a heat-resistant concrete foundation wall connected to the upper integrated steel structure support frame, and heat-resistant concrete is cast inside, which can prevent the slag iron liquid from overflowing from the ditch body.

[0017] After the casting is completed, the upper surface of the present invention is paved with a 20mm thick steel plate, and the upper surface elevation of the steel plate is consistent with the surface elevation of the iron-making yard, thereby ensuring the flatness of the iron-making yard.

[0018] The device of the present invention is an integrated trough-type steel structure design that forms a solid whole with the lower high-temperature resistant reinforced concrete foundation wall. It can meet the disintegration of the blast furnace slag ditch and the rolling of the excavator crawler during pouring construction operations. It can resist the erosion caused by the radiant heat of the slag and iron water, and can resist the deformation caused by the radiant heat of the slag and iron water. It can also ensure the flatness of the paving of the upper cover plate of the retaining wall, and can ensure that the refractory material in the new device can be quickly repaired when it is damaged.

[0019] The service life of the invention can be extended to more than 12 years. The one-time investment can reduce the maintenance time and construction cost during blast furnace production. The device of the invention is conducive to promotion and application in blast furnace iron-making yards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the present invention;

[0021] Figure 2 is a three-dimensional schematic diagram of the support frame of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the thermal radiation protection layer of the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] like Figure 1-3 As shown, a slag ditch retaining wall structure of a blast furnace iron-making yard comprises a slag ditch steel groove 1, and retaining wall structures are fixedly arranged on both sides of the slag ditch steel groove. The retaining wall structure comprises a base wall 2 and a support frame 3, and the base wall 2 and the support frame 3 are located on both sides of the slag ditch steel groove 1, and the support frame 3 of the steel structure is fixed on the upper part of the base wall 2;

[0027] The foundation wall 2 is a heat-resistant concrete foundation wall, the lower surface of the support frame 3 is tightly welded to the steel bars reserved at the connection of the foundation wall 2, and the secondary pouring of high-temperature resistant concrete and the foundation wall 2 of the lower high-temperature resistant reinforced concrete is formed into a whole;

[0028] The upper surface elevation of the support frame 3 is at the same elevation as the surface elevation of the iron-casting yard.

[0029] The support frame 3 is a steel structure support frame, which is composed of multiple evenly distributed trough structures welded by steel plates. The support frame 3 is composed of several trough structures, and each trough structure is arranged in a stepped manner from low to high. The trough structure has multiple independent trough bodies with hollow interiors, and the trough structure is provided with heat-resistant concrete filling 4.

[0030] On both sides of the groove of the slag ditch steel structure, the lower part is a cast high-temperature resistant reinforced concrete foundation wall. On the upper part of the lower cast high-temperature resistant reinforced concrete foundation wall, the support frame 3 is a trough structure welded with 20mm steel plates. The lower surface of the support frame 3 is tightly welded to the reserved steel bars on the upper part of the lower cast high-temperature resistant reinforced concrete foundation wall, and the high-temperature resistant concrete is cast for the second time to form a whole with the lower high-temperature resistant reinforced concrete foundation wall.

[0031] After the casting is completed, the upper surface of the support frame 3 is paved with a 20mm thick steel plate, and the upper surface elevation of the steel plate is consistent with the surface elevation of the iron-making yard to ensure the flatness of the iron-making yard.

[0032] Anchor nails are welded on the inner side vertical steel plate of the support frame 3, and refractory materials are sprayed on the anchor nails to suppress the radiant heat generated by the slag iron water during the slag iron operation.

[0033] The present invention is an integrated trough-type steel structure design that forms a solid whole with the lower high-temperature resistant reinforced concrete wall, which can meet the requirements of disintegration of blast furnace slag iron grooves and rolling of excavator tracks during pouring construction operations, can resist erosion caused by radiant heat from slag iron water, can resist deformation caused by radiant heat from slag iron water, can ensure the flatness of the paving of the upper cover plate of the retaining wall, can ensure rapid repair of refractory materials in the device when they are damaged, the support frame can be manufactured before construction, and the support structure can be installed after the foundation wall construction is completed, which saves 50% of construction time and extends the service life of the device to more than 12 years.

[0034] The device can be promoted and applied in the blast furnace casting yard. Different shapes can be made according to different slag ditch retaining wall structures.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A slag ditch retaining wall structure for a blast furnace iron-making site, comprising a slag ditch steel groove (1), characterized in that: A retaining wall structure is fixedly arranged on both sides of the slag iron ditch steel groove, and the retaining wall structure comprises a base wall (2) and a support frame (3). The base wall (2) and the support frame (3) are located on both sides of the slag iron ditch steel groove (1), and the support frame (3) of the steel structure is fixed on the upper part of the base wall (2); The foundation wall (2) is a heat-resistant concrete foundation wall, the lower surface of the support frame (3) is tightly welded to the steel bars reserved at the connection between the foundation wall (2), and secondary pouring of high-temperature resistant concrete is performed to form a whole with the foundation wall (2) of the lower high-temperature resistant reinforced concrete; The upper surface elevation of the support frame (3) is at the same elevation as the surface elevation of the iron casting yard; The support frame (3) is a steel structure support frame, which is a plurality of evenly distributed trough structures welded by steel plates; The support frame (3) is composed of a plurality of trough-shaped body structures, and each trough-shaped body structure is arranged in a ladder-like manner from low to high; The trough structure has a plurality of independent troughs with hollow interiors, and the interior of the trough structure is filled with heat-resistant concrete (4); A heat radiation protection layer (5) is provided on one side of the inner wall of the support frame (3) relative to the slag iron ditch steel groove (1), and the heat radiation protection layer (5) is an anchor external sprayed concrete structure; A blocking plate is fixedly arranged on the upper surface of the support frame (3); the blocking plate is a steel plate structure and is fixedly connected to the upper surface of the support frame (3) by welding or bolts; A cover plate (6) is laid on the support frame (3).

2. The slag ditch retaining wall structure of a blast furnace iron-making site according to claim 1, characterized in that: The anchor nail external sprayed concrete structure is fixed to the side facade steel plate of the support frame (3) by welding, and the anchor nail external sprayed concrete structure comprises anchor nails, the anchor nails are fixed to the side facade steel plate of the support frame (3), and refractory material is sprayed on the anchor nails.

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