Split type partially-reusable steel ladle collector nozzle
By dividing the ladle drain outlet into three parts—a cover plate, an inner core, and an outer casing—and utilizing caustic bonding and filling technology, the ladle drain outlet can be disassembled and reused, solving the problem of waste of the remaining parts after use and reducing procurement costs.
Patent Information
- Application Number
- CN202423048969.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing steel ladle drain outlets are still intact after use but are wasted, resulting in high procurement costs, and the existing technology cannot effectively achieve reuse.
The ladle drain outlet adopts a split design, which divides the ladle drain outlet into three parts: cover plate, inner core and outer shell. They are fixed together with fire clay and the gaps are filled with fire clay to achieve disassembly and reuse. The design of the outer shell and inner core prevents them from melting at high temperatures and keeps them in a split state.
This technology enables the reuse of the remaining portion of the ladle drain without affecting its service life, reducing procurement costs by more than 50%.
Smart Images
Figure CN223970848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of drain outlets for steel ladle refractory materials, and in particular to a split-type partially reusable steel ladle drain outlet. Background Technology
[0002] Ladle drain outlet (e.g.) Figure 1 (As shown) is a functional material that carries the flow of molten steel. It, together with the upper and lower slide plates, forms a sliding gate system to control the flow rate of molten steel. It is one of the most critical flow control system functional refractory materials in the continuous casting process. At present, most ladle gates are made of aluminum-carbon alloy. The conventional practice is to use a single material. This type of ladle gate has strong oxidation resistance, excellent thermal shock stability, and excellent erosion resistance. Therefore, it has a long service life and is safe and stable, so it is widely used.
[0003] However, upon observation of the used ladle drain outlet, only 5-10 mm of the refractory material in the steel flow channel was eroded away by the steel flow, and the upper surface of the ladle drain outlet in contact with the sliding plate was slightly damaged. The rest of the outlet was intact. In this case, it would be wasteful to discard the used ladle drain outlet. Moreover, through cost analysis, the cost of a ladle drain outlet is about 100 yuan, of which the cost of the steel shell is about 30 yuan and the cost of the refractory material is about 50 yuan.
[0004] In conclusion, if the ladle drain outlet can be reused after use, the procurement cost of the ladle drain outlet will be greatly reduced and the economic benefits will be improved. This is the problem that this utility model aims to solve. Utility Model Content
[0005] The purpose of this invention is to provide a split, partially reusable ladle drain outlet, in which the remaining part of the ladle drain outlet can be reused after use without affecting its service life.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A split-type, partially reusable steel ladle drain outlet includes a cover plate, an inner core, an outer sleeve, and a steel shell. The steel shell is fixedly fitted onto the outside of the outer sleeve, the inner core is fixed to the inside of the outer sleeve by fire-molded adhesive, and the cover plate is fixed to the upper end of the outer sleeve by fire-molded adhesive and is flush with the upper end surface of the inner cylinder.
[0008] The inner hole of the outer casing is a stepped hole, with the larger diameter of the stepped hole on the side of the large end of the sprue. The outer circle of the inner core matches and connects with the inner hole of the outer casing.
[0009] The upper surface of the outer jacket is provided with a groove, and the cover plate is inserted and fixed to the upper surface of the outer jacket and the groove.
[0010] The groove is located on one side of the inner hole of the outer casing.
[0011] The maximum thickness of the inner core is 2.5 to 3.5 times the thickness eroded during its service life.
[0012] A gap of 0.5 to 1.5 mm is left between the cover plate and the inner core for filling with fire clay, a gap of 0.5 to 1.5 mm is left between the cover plate and the outer sleeve for filling with fire clay, and a gap of 0.5 to 1.5 mm is also left between the outer sleeve and the inner core for filling with fire clay.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] A modular, partially reusable ladle drain outlet allows for reuse of the remaining portion after use without affecting service life. This modular ladle drain outlet can reduce costs by more than 50%. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of the drain outlet of a steel ladle using existing technology.
[0016] Figure 2 This is a cross-sectional view of the drain outlet of the steel ladle in this utility model.
[0017] Figure 3 This is a cross-sectional view of the cover plate in this utility model.
[0018] Figure 4 This is a cross-sectional view of the inner core in this utility model.
[0019] Figure 5 This is a cross-sectional view of the outer casing in this utility model.
[0020] Figure 6 This is a perspective view of the cover plate in this utility model.
[0021] Figure 7 This is a semi-stereoscopic view of the outer casing in this utility model.
[0022] Figure 8 This is a perspective view of the inner core in this utility model.
[0023] In the diagram: 1-steel shell, 2-drain body, 3-outer jacket, 4-cover plate, 5-inner core. Detailed Implementation
[0024] The specific embodiments of this utility model are further described below:
[0025] like Figures 2-8As shown: A split-type partially reusable steel ladle drain outlet includes a cover plate 4, an inner core 5, an outer sleeve 3, and a steel shell 1. The steel shell 1 is fixedly fitted onto the outside of the outer sleeve 3. The inner core 5 is fixed inside the outer sleeve 3 by fire-molded adhesive. The cover plate 4 is fixed to the upper end of the outer sleeve 3 by fire-molded adhesive and is flush with the upper end surface of the inner cylinder 5.
[0026] The inner hole of the outer sleeve 3 is a stepped hole, with the larger diameter of the stepped hole on the side of the large end of the sprue. The outer circle of the inner core 5 is matched and connected to the inner hole of the outer sleeve 3.
[0027] The upper surface of the outer jacket 3 is provided with a groove, and the cover plate 4 is inserted and fixed to the upper surface and groove of the outer jacket 3.
[0028] The groove is located on one side of the inner hole of the outer sleeve 3.
[0029] The maximum thickness of the inner core 5 is 2.5 to 3.5 times the thickness eroded during its service life.
[0030] A gap of 0.5–1.5 mm is left between the cover plate 4 and the inner core 5 for filling with fire clay. A gap of 0.5–1.5 mm is left between the cover plate 4 and the outer sleeve 3 for filling with fire clay. A gap of 0.5–1.5 mm is also left between the outer sleeve 3 and the inner core 5 for filling with fire clay. The gaps between the three parts of the split-type drain outlet are tolerance gaps during assembly, and are filled with special fire clay during assembly.
[0031] A method for preparing a split-type, partially reusable ladle drain outlet includes the following steps:
[0032] 1) After determining the dimensions of the three separate parts of the split drain outlet, each part of the drain outlet can be manufactured separately. After manufacturing, it is assembled. During assembly, the outer jacket 3 with the steel shell is first fixed with a clamp, and then a layer of fire clay with a thickness of 2-3 mm is applied to the outer surface of the inner core 5. The inner core 5 is placed into the outer jacket 3 and compacted so that the inner core reaches the position specified by the outer jacket 3.
[0033] 2) Apply a layer of fire putty with a thickness of 2-3 mm to the lower surface and inner side of the cover plate 4, and press it into the outer sleeve 3 from top to bottom so that the cover plate 4 reaches the specified position of the outer sleeve 3. Then wipe the excess fire putty squeezed out with a cloth. In this way, the split drain outlet is assembled.
[0034] 3) Place the assembled split drain in a drying kiln at 110-150℃ and dry for 5-8 hours. The split drain is then manufactured and a new split drain is obtained.
[0035] 4) After the split drain outlet is used on the ladle, remove it with tools, let it cool, and place it on the hollow clamp with the large end facing down; place an iron rod with a diameter smaller than the outer diameter of the inner core 5 and larger than the inner diameter of the inner core 5 on the inner core 5, and hit the iron rod with a hammer. This way, the remaining inner core 5 will fall out of the outer sleeve 3. Then use tools to remove the cover plate 4, leaving only the outer sleeve 3.
[0036] 5) Use tools to clean the impurities remaining on the inside and outside of the outer casing 3. This will give you a qualified outer casing 3. Then repeat steps 1)-3) to get a new split drain outlet. This allows you to reuse the outer casing 3 after use. Repeat this process until the outer casing 3 is damaged.
[0037] The fire putty is composed of 80-90 parts by weight of 325-mesh white corundum powder, 6-10 parts by weight of 100-mesh graphite powder, 5-10 parts by weight of dextrin and 5-10 parts by weight of water. This fire putty has a strong adhesive effect at room temperature and does not melt at high temperatures (the high operating temperature of the ladle drain is 1500-1600℃), keeping the components from sintering together.
[0038] The cover plate 4 and inner core 5 are made of aluminum-carbon material and are formed by machine pressing; the outer shell 3 is a refractory material layer made of corundum-mullite and is formed by casting vibration; the steel shell 1 is made of Q235 steel.
[0039] This utility model's split-type ladle drain outlet consists of three parts: a cover plate 4, an inner core 5, and an outer sleeve 3. After assembling the cover plate 4, inner core 5, and outer sleeve 3, a split-type ladle drain outlet is formed, which differs from traditional ladle drain outlets (see...). Figure 1 They are the same shape and size.
[0040] The inner diameter of the inner core 5 is the same as the diameter of the steel flow channel at the drain outlet, and its height is the same as the drain outlet itself. The maximum outer diameter of the inner core 5 is determined based on the corrosion thickness of the drain outlet after its service life, with the principle being that the maximum thickness of the inner core 5 is approximately three times the corrosion thickness. For example, if the corrosion thickness of the drain outlet is 10 mm, then the maximum outer diameter of the inner core 5 is the diameter of the steel flow channel + 60 mm. The outer diameter of the lower small-diameter cylinder of the outer frustum of the inner core 5 is 10-20 mm smaller than the outer diameter of the upper large-diameter cylinder, and the height of the lower small-diameter cylinder of the inner core 5 is 40-80 mm.
[0041] Specific implementation example (taking a 260-ton steel ladle from a steel plant as an example):
[0042] 1. Based on the dimensions of the steel plant's sewer outlet drawings and the erosion thickness of the sewer outlet after one cycle of use, determine the dimensions of each part of the designed split-type sewer outlet.
[0043] 2. This split-type drain outlet consists of the following three parts: cover plate 4, inner core 5, and outer sleeve 3. The cover plate 4, inner core 5, and outer sleeve 3 are combined to form a split-type ladle drain outlet, which is the same in shape and size as the existing ladle drain outlet in this steel plant.
[0044] 3. The inner diameter of core 5 is the same as the diameter of the steel flow channel at the drain outlet, and its height is the same as the original drain outlet. Observing that the erosion thickness at this steel plant's drain outlet is 10 mm, the maximum outer diameter of core 5 is the diameter of the steel flow channel + 60 mm. The smaller outer diameter at the bottom of core 5 is 20 mm smaller than the larger outer diameter at the top, and the height of the cylindrical portion with the smaller outer diameter at the bottom of core 5 is 50 mm.
[0045] 4. The cover plate 4 is a composite shape of a frustum and a cone with an inner hole. The shape of the upper surface of the cover plate 4 is the same as the upper part of the original drain outlet. There is a 1.5 mm gap between the cover plate 4 and the inner core 5, and a 1.5 mm gap between the cover plate 4 and the outer sleeve 3.
[0046] 5. Once the dimensions of the inner core 5 and the cover plate 4 are determined, the remaining shape of the drain outlet is the outer sleeve 3. There is a 1.5 mm gap between the outer sleeve 3 and the adjacent parts of the inner core 5 and the cover plate 4.
[0047] 6. The gaps between the three parts of the split drain outlet are tolerance gaps during assembly, and are filled with special fire putty during assembly.
[0048] 7. The cover plate 4 and the inner core 5 are made of aluminum carbon material and are machine-pressed.
[0049] 8. The steel shell 1 is made of Q235 steel, and the outer shell 3 is made of corundum mullite, using a casting vibration molding process.
[0050] 9. The special fire putty for filling the gaps is made of 84 parts of 325-mesh white corundum powder, 10 parts of 100-mesh graphite powder, 6 parts of dextrin, and 7 parts of water (the above are parts by weight). This fire putty has a strong adhesive effect at room temperature and does not melt at high temperature, keeping the components from sintering together.
[0051] 10. After determining the dimensions of the three separate parts of the split drain outlet, each part of the drain outlet can be manufactured separately. After manufacturing, they are then assembled. During assembly, first use a clamp to fix the outer sleeve 3 assembled with the steel shell 1. Then, apply a layer of fire clay about 3 mm thick to the outer surface of the inner core 5. Then, put the inner core 5 into the outer sleeve 3 and press it down so that the inner core 5 reaches the specified position of the outer sleeve 3. Then, apply a layer of fire clay about 3 mm thick to the lower surface and inner side of the cover plate 4. Put it into the outer sleeve 3 from top to bottom and press it down so that the cover plate 4 reaches the specified position of the outer sleeve 3. Then, wipe off the excess fire clay squeezed out with a cloth. In this way, the split drain outlet is assembled. Then, put the assembled split drain outlet into a drying kiln at 150℃ and dry it for 5 hours. Then the split drain outlet is manufactured.
[0052] 11. After the split drain outlet is used on the ladle, remove it with tools, let it cool, and place it with the large end down on a hollow clamp. Place an iron rod with a diameter slightly smaller than the outer diameter of the inner core 5 on the inner core 5, and strike the iron rod with a hammer. This will cause the remaining inner core 5 to fall out of the outer casing 3. Then, use tools to remove the cover plate 4, leaving only the outer casing 3. Clean the remaining impurities on the inside and outside of the outer casing 3 with tools. This will give you a qualified outer casing 3. Then repeat the assembly and drying steps in step 10 to get a new split drain outlet. This achieves the reuse of the outer casing 3 part of the drain outlet after use. Repeat this process until the outer casing is damaged.
Claims
1. A split, partially reusable ladle shroud, characterized by, It comprises a cover plate, an inner core, an outer sleeve and a steel shell, the steel shell is fixedly sleeved outside the outer sleeve and fixed by fire clay, the inner core is fixedly bonded inside the outer sleeve by fire clay, and the cover plate is fixedly bonded at the upper end of the outer sleeve and flush with the upper end surface of the inner core.
2. The split, partially reusable ladle shroud of claim 1, wherein, The inner hole of the outer sleeve is a stepped hole, the large aperture of the stepped hole is at the side of the large head of the water gap, and the outer circle of the inner core is matched and connected with the inner hole of the outer sleeve.
3. The split, partially reusable ladle shroud of claim 1, wherein, The upper end surface of the outer sleeve is provided with a groove, and the cover plate is inserted and fixed in cooperation with the upper end surface and the groove of the outer sleeve.
4. The split, partially reusable ladle shroud of claim 3, wherein, The groove is arranged at one side of the inner hole of the outer sleeve.
5. The split, partially reusable ladle shroud of claim 1, wherein, The maximum thickness of the inner core is 2.5-3.5 times of the eroded thickness in the use cycle.
6. The split, partially reusable ladle shroud of claim 1, wherein, A gap of 0.5-1.5mm is left between the cover plate and the inner core for filling fire clay, a gap of 0.5-1.5mm is left between the cover plate and the outer sleeve for filling fire clay, and a gap of 0.5-1.5mm is also left between the outer sleeve and the inner core for filling fire clay.