DRI lock hopper
By setting a refractory layer and impact plate in the DRI lock hopper, combined with heat insulation lining, lining gasket and unloading pipe flange, the problems of wear and insufficient heat utilization of the DRI lock hopper at high temperature are solved, and the fire resistance and stability of the equipment are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHENG ENG
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-19
AI Technical Summary
DRI lock buckets are prone to wear under high temperatures and pellet impacts, resulting in a short service life and inefficient heat utilization.
A refractory layer and impact plate are installed in the DRI lock hopper, combined with heat insulation lining, lining gasket and unloading pipe flange, to form a multi-layer protection structure to avoid high temperature heat conduction and sealing failure.
It improves the fire resistance and wear resistance of the DRI lock bucket, extends its service life, and ensures the effective utilization of heat and stable operation of the equipment.
Smart Images
Figure CN224258670U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressurized gas-based reduced iron pelleting technology, and in particular to a DRI lock bucket. Background Technology
[0002] Pressurized gas-based reduced iron (PRI) technology is a rapidly developing and urgently needed high-efficiency ironmaking technology. In this technology, pellets undergo a reduction reaction with carbon monoxide and hydrogen in a high-temperature, high-pressure environment using a gas-based reduced iron unit. Stable operation of the equipment and heat recovery within the system are key technical challenges that need to be addressed and overcome in pressurized gas-based reduced iron technology. After pressurization, the pellets are transported by gravity from top to bottom through a pellet lock hopper, a gas-based vertical shaft furnace, and a DRI (Direct Reduced Iron) lock hopper before being sent to subsequent processing stages for steelmaking.
[0003] DRI lock hoppers are important equipment for realizing periodic material discharge operations in the process of conveying sponge iron. In order to ensure the effective utilization of system heat, the temperature of sponge iron is kept at a high temperature. This causes the DRI lock hoppers to be prone to wear and have a short service life under high temperature and impact of pellets. Utility Model Content
[0004] The purpose of this invention is to provide a DRI lock bucket to at least partially solve the above-mentioned problems of the prior art.
[0005] To achieve the above objectives, this utility model provides a DRI lock hopper, comprising an upper hopper portion and a lower interface portion;
[0006] The hopper section includes, from the outside to the inside, a conical shell 1, a refractory layer 2, and an anti-impact plate 4. The inner side of the conical shell 1 is covered with the refractory layer 2, and the lower inner side of the refractory layer 2 is covered with the anti-impact plate 4.
[0007] The interface portion includes, from the inside out, a heat insulation liner 5, a heat insulation liner gasket 7, and a discharge pipe flange 6, wherein the heat insulation liner gasket 7 is located between the heat insulation liner 5 and the discharge pipe flange 6.
[0008] The lower part of the cone shell 1 is connected to the unloading pipe flange 6, and the heat insulation liner 5 is fixedly connected to the lower end of the anti-impact plate 4.
[0009] Preferably, the lower part of the refractory layer 2 is located between the heat insulation liner 5 and the unloading pipe flange 6.
[0010] Preferably, the hopper section further includes a support rib plate 3 disposed on the refractory layer 2.
[0011] Preferably, the supporting stiffener 3 is arranged in a ring around the inner surface of the hopper on the refractory layer 2.
[0012] Preferably, the supporting stiffener 3 is embedded in the refractory layer 2.
[0013] Preferably, the supporting stiffener 3 is in contact with the upper end of the anti-impact plate 4.
[0014] Preferably, the upper end of the anti-impact plate 4 is fixedly connected to the supporting stiffener plate 3.
[0015] Preferably, the heat insulation liner 5 is formed into a cylindrical shape at the interface.
[0016] Preferably, the lower part of the refractory layer 2 is in contact with the heat insulation lining pad 7.
[0017] Preferably, the refractory layer 2 is fixed to the cone shell 1 by a hexagonal mesh.
[0018] Compared with the prior art, the present invention has at least the following advantages:
[0019] By setting the refractory layer 2 and the anti-impact plate 4, the fire resistance of the DRI lock bucket is improved, avoiding high-temperature heat conduction caused by direct contact between the sponge iron and the cone shell 1, which could lead to the failure of the cone shell strength. Furthermore, the anti-impact plate 4 prevents the refractory layer from falling off. The addition of the heat insulation liner 5, the unloading pipe flange 6, and the heat insulation liner gasket 7 between them can effectively prevent high-temperature heat conduction caused by direct contact between the high-temperature sponge iron and the equipment wall, and prevent the unloading pipe flange 6 from failing to seal and leaking at high temperature. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a DRI lock bucket provided by this utility model.
[0021] Figure 2 A top view schematic diagram of the support rib plate of a DRI lock bucket provided by this utility model.
[0022] Figure 3 A top view of the heat insulation liner 5 and heat insulation liner pad 7 of a DRI lock bucket provided by this utility model. Detailed Implementation
[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate to understand the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a product or device comprising a series of units is not necessarily limited to those explicitly listed, but may include other units not explicitly listed or inherent to such product or device.
[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0029] Example 1
[0030] This utility model provides a DRI lock bucket. Figure 1 A schematic diagram of the DRI lock bucket is shown. (See attached diagram.) Figure 1 As shown, the DRI lock hopper includes an upper hopper section and a lower interface section;
[0031] The hopper section includes, from the outside to the inside, a conical shell 1, a refractory layer 2, and an anti-impact plate 4. The inner side of the conical shell 1 is covered with the refractory layer 2, and the lower inner side of the refractory layer 2 is covered with the anti-impact plate 4.
[0032] The interface portion, from the inside out, includes an insulation liner 5, an insulation liner gasket 7, and a discharge pipe flange 6, wherein the insulation liner gasket 7 is located between the insulation liner 5 and the discharge pipe flange 6; as shown Figure 1 As shown, the lower part of the insulation liner 5, where the lines thicken, is fitted with an insulation liner pad 7.
[0033] The lower part of the cone shell 1 is connected to the unloading pipe flange 6, and the heat insulation liner 5 is fixedly connected to the lower end of the anti-impact plate 4.
[0034] In a preferred embodiment, the lower part of the refractory layer 2 is located between the heat insulation liner 5 and the unloading flange 6. Alternatively, the lower part of the refractory layer 2 may only contact the heat insulation liner 5; the specific implementation can be flexibly adjusted according to actual needs.
[0035] In a preferred embodiment, the hopper portion further includes support ribs 3 disposed on the refractory layer 2. The support ribs 3 may be arranged in a ring around the inner surface of the hopper on the refractory layer 2. It is readily understood that the support ribs 3 may also have other shapes; for example, they may include multiple ribs spaced apart from each other on the refractory layer 2. Preferably, the support ribs 3 are embedded within the refractory layer 2 to make the inner surface of the hopper smooth.
[0036] In a preferred embodiment, the supporting stiffener 3 is in contact with the upper end of the impact-resistant plate 4. For example, the upper end of the impact-resistant plate 4 is fixedly connected to the supporting stiffener 3. This connection method can further increase the robustness of the supporting stiffener 3 and the impact-resistant plate 4.
[0037] In a preferred embodiment, the heat insulation liner 5 is formed into a cylindrical shape at the interface, thus forming the side of the cylinder.
[0038] In a preferred embodiment, the lower part of the refractory layer 2 is in contact with the heat insulation liner 7. This arrangement can completely prevent the heat insulation liner 5 from contacting the unloading pipe flange 6, thus avoiding the high temperature of the unloading pipe flange 6.
[0039] In a preferred embodiment, the refractory layer 2 is fixed to the cone shell 1 and the unloading flange 6 by a hexagonal mesh; the supporting stiffeners 3 are welded to the cone shell 1, and the weld feet are ground smooth; the anti-impact plates 4 are corner-welded to 8 evenly distributed supporting stiffeners 3. Figure 2A schematic diagram of eight evenly distributed support stiffeners 3 is shown. For example, the anti-impact plate 4 can be welded to these eight evenly distributed support stiffeners 3. The space between the anti-impact plate 4 and the conical shell 1 is welded with a hexagonal wire mesh and a refractory layer 2 is laid. The heat insulation liner 5 is welded to the anti-impact plate 4. A heat insulation liner gasket 7 is set below the heat insulation liner 5. The heat insulation liner gasket 7 can be a gasket ring, so that there is a gap between the heat insulation liner 5 and the unloading pipe flange 6, preventing the heat insulation liner 5 from completely contacting the unloading pipe flange of the part 6 and avoiding large-area heat transfer.
[0040] In a preferred embodiment, the heat insulation liner 5 and the heat insulation liner pad 7 can be integrated, and the heat insulation liner pad 7 is an annular protrusion on the heat insulation liner 5. Figure 3 The diagram shows a top view of the thermal insulation liner 5 and the thermal insulation liner gasket 7. By setting the thermal insulation liner gasket 7, a gap is created between the thermal insulation liner 5 and the unloading pipe flange 6, allowing the thermal insulation liner gasket 7 to support the unloading pipe flange 6 during unloading.
[0041] By adopting the DRI lock bucket provided in this embodiment of the utility model, and setting a refractory layer 2 and an anti-impact plate 4, the fire resistance of the DRI lock bucket is improved, avoiding high-temperature heat conduction caused by direct contact between the sponge iron and the cone shell 1, which could lead to the failure of the cone shell strength. Furthermore, the anti-impact plate 4 prevents the refractory layer from falling off. The addition of a heat insulation liner 5, a discharge pipe flange 6, and a heat insulation liner gasket 7 between them can effectively prevent high-temperature heat conduction caused by direct contact between the high-temperature sponge iron and the equipment wall, and prevent the discharge pipe flange 6 from failing to seal and leaking at high temperature. Thus, it can meet the requirements of the pellet pressurized gas-based reduced iron technology for the DRI lock bucket.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A DRI lock bucket, characterized in that, This includes the upper hopper section and the lower interface section; The hopper section includes, from the outside to the inside, a conical shell (1), a refractory layer (2), and an anti-impact plate (4). The inner side of the conical shell (1) is covered with the refractory layer (2), and the lower inner side of the refractory layer (2) is covered with the anti-impact plate (4). The interface portion includes, from the inside out, a heat insulation liner (5), a heat insulation liner gasket (7), and a discharge pipe flange (6), wherein the heat insulation liner gasket (7) is located between the heat insulation liner (5) and the discharge pipe flange (6); The lower part of the cone shell (1) is connected to the unloading pipe flange (6), and the heat insulation liner (5) is fixedly connected to the lower end of the anti-impact plate (4).
2. The DRI lock bucket according to claim 1, characterized in that, The lower part of the refractory layer (2) is located between the heat insulation liner (5) and the unloading pipe flange (6).
3. The DRI lock bucket according to claim 1, characterized in that, The hopper section also includes a support rib plate (3) set on the refractory layer (2).
4. The DRI lock bucket according to claim 3, characterized in that, The supporting ribs (3) are arranged in a ring around the inner surface of the hopper on the refractory layer (2).
5. The DRI lock bucket according to claim 3 or 4, characterized in that, The supporting stiffener (3) is embedded in the refractory layer (2).
6. The DRI lock bucket according to claim 3 or 4, characterized in that, The upper end of the supporting stiffener (3) is in contact with the anti-impact plate (4).
7. The DRI lock bucket according to claim 6, characterized in that, The upper end of the anti-impact plate (4) is fixedly connected to the supporting stiffener plate (3).
8. The DRI lock bucket according to claim 1, characterized in that, The heat insulation liner (5) is formed into a cylindrical shape at the interface.
9. The DRI lock bucket according to claim 1 or 8, characterized in that, The lower part of the refractory layer (2) is in contact with the heat insulation lining pad (7).
10. The DRI lock bucket according to claim 1 or 8, characterized in that, The refractory layer (2) is fixed to the cone shell (1) by a tortoise shell mesh.