Split type partially-recycled steel ladle collector nozzle and preparation method
By decomposing the ladle sewer into a cover plate, inner core and outer jacket, and assembling and disassembling using fire mud bonding technology, partial reuse of the ladle sewer is achieved, the problems of waste of resources and high procurement costs are solved, and economic benefits are improved by reducing costs by more than 50%.
Patent Information
- Application Number
- CN202411813277.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-03-14
AI Technical Summary
After use, the existing ladle drain outlets are damaged due to erosion of flow steel, resulting in waste of resources, and the procurement cost is high, making it difficult to improve economic benefits.
A ladle drain outlet with a split part is designed, and the reuse of the jacket is achieved by decomposing it into a cover plate, inner core and outer jacket, and assembling and disassembling using fire mud bonding technology.
Without affecting the service life, the remaining part of the ladle sewer after use is reused, reducing procurement costs, improving economic benefits, and reducing costs by more than 50%.
Smart Images
Figure CN119609111A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of downspouts for refractory materials of a ladle, and in particular to a split partially reused downspout for a ladle and a preparation method thereof. Background Art
[0002] Ladle outlet (such as Figure 1 (as shown) is a functional material that carries the flow of molten steel. It forms a sliding nozzle system with the upper and lower slides to control the flow rate of molten steel. It is one of the most critical functional refractory materials of the flow control system in the continuous casting process. At present, most ladle nozzles are made of aluminum carbon. The conventional practice is to use a material. This ladle nozzle has strong oxidation resistance, excellent thermal shock stability, and excellent anti-scouring performance, so it has a long service life and is safe and stable, so it is widely used.
[0003] However, by observing the used ladle drain, only the refractory material of the steel flow channel was eroded by the steel flow for 5-10 mm, and the upper surface of the ladle drain in contact with the lower slide plate was slightly damaged, while the remaining part was intact. At this time, it would be a waste if the used ladle drain was thrown away. Moreover, through cost analysis, the cost of a ladle drain is about 100 yuan, of which the steel shell cost is about 30 yuan and the refractory material cost is about 50 yuan.
[0004] In summary, if the ladle drain nozzle can be reused after use, the purchase cost of the ladle drain nozzle will be greatly reduced and the economic benefit will be improved, which is the problem to be solved by the present invention. Summary of the invention
[0005] The purpose of the present invention is to provide a split partially reusable ladle drain and a preparation method thereof, wherein the remaining part of the ladle drain after use can be reused without affecting the service life.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions:
[0007] A split partially reused ladle drain includes a cover plate, an inner core, an outer shell and a steel shell, wherein the steel shell is fixedly sleeved on the outside of the outer shell, the inner core is fixed to the inside of the outer shell by fire mud bonding, and the cover plate is fixed to the upper end of the outer shell by fire mud bonding and is flush with the upper end surface of the inner cylinder.
[0008] The inner hole of the outer sleeve is a stepped hole, the large aperture of the stepped hole is on the side of the large end of the nozzle, and the outer circle of the inner core is matched and connected with the inner hole of the outer sleeve.
[0009] The upper end surface of the outer sleeve is provided with a groove, and the cover plate is plugged and fixed with the upper end surface of the outer sleeve and the groove.
[0010] The groove is arranged on one side of the inner hole of the outer sleeve.
[0011] The maximum thickness of the inner core is 2.5 to 3.5 times the thickness eroded during the service life.
[0012] A gap of 0.5 to 1.5 mm is reserved between the cover plate and the inner core for filling with fire clay, a gap of 0.5 to 1.5 mm is reserved between the cover plate and the outer jacket for filling with fire clay, and a gap of 0.5 to 1.5 mm is reserved between the outer jacket and the inner core for filling with fire clay.
[0013] A method for preparing a split partially reusable ladle drain nozzle comprises the following steps:
[0014] 1) After determining the sizes of the three parts of the split drain, the various parts of the drain can be manufactured separately. After the manufacturing is completed, they can be assembled. During assembly, first fix the outer jacket with a clamp, then apply a layer of fire clay with a thickness of 2 to 3 mm on the outer surface of the inner core, put the inner core into the outer jacket and compact it so that the inner core reaches the position specified by the outer jacket.
[0015] 2) Apply a layer of 2-3mm thick fire clay on the lower surface and inner side of the cover plate, put it into the jacket from top to bottom and compact it so that the cover plate reaches the position specified by the jacket, then wipe off the excess fire clay squeezed out with a rag, and the split drain is now assembled.
[0016] 3) Put the assembled split drain into a drying kiln at 110-150° C. and dry it for 5-8 hours. Then the split drain is completed and a new split drain is obtained.
[0017] 4) After the split drain is used on the ladle, remove it with tools, let it cool, and then place the big end of the drain downward on a hollow fixture; place an iron rod with a diameter smaller than the outer diameter of the inner core and larger than the inner diameter of the inner core on the inner core, and hit the iron rod with a hammer, so that the remaining inner core will fall out of the outer jacket, and then use tools to remove the cover, leaving only the outer jacket.
[0018] 5) Use tools to clean the remaining impurities on the inside and outside of the jacket, so that you can get a qualified jacket, and then repeat steps 1)-3) to get a new split drain, so that the jacket part of the drain can be reused after use, and so on, repeat the cycle until the jacket is damaged.
[0019] The fire clay is a mixture of 80-90 parts of 325 mesh white corundum powder, 6-10 parts of 100 mesh graphite powder, 5-10 parts of dextrin and 5-10 parts of water by weight. The fire clay has a strong bonding effect at room temperature, does not melt at high temperature (the high temperature working temperature of the ladle outlet is 1500-1600°C), and keeps the various parts from sintering together.
[0020] The cover plate and the inner core are made of aluminum carbon material and are formed by machine pressing; the outer shell is a refractory material layer, made of corundum mullite, and is formed by casting and vibration; the steel shell is made of Q235 steel.
[0021] Compared with the prior art, the present invention has the following beneficial effects:
[0022] A split type partially reused ladle drain and a preparation method thereof, under the premise of not affecting the service life, the remaining part of the ladle drain after use can be reused. The split type ladle drain of the invention can reduce the cost by more than 50%. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a cross-sectional view of a ladle outlet in the prior art.
[0024] Figure 2 It is a cross-sectional view of the ladle outlet of the present invention.
[0025] Figure 3 It is a cross-sectional view of the cover plate in the present invention.
[0026] Figure 4 It is a cross-sectional view of the inner core in the present invention.
[0027] Figure 5 It is a cross-sectional view of the outer jacket of the present invention.
[0028] Figure 6 It is a three-dimensional diagram of the cover plate in the present invention.
[0029] Figure 7 It is a semi-stereoscopic view of the outer coat in the present invention.
[0030] Figure 8 It is a three-dimensional diagram of the inner core in the present invention.
[0031] In the figure: 1- steel shell, 2- drain body, 3- outer jacket, 4- cover plate, 5- inner core. DETAILED DESCRIPTION
[0032] The specific implementation mode of the present invention is further described below:
[0033] like Figure 2-Figure 8 As shown: a split partially reused ladle drain, including a cover plate 4, an inner core 5, an outer sleeve 3 and a steel shell 1, wherein the steel shell 1 is fixedly sleeved on the outside of the outer sleeve 3, the inner core 5 is fixed to the inside of the outer sleeve 3 by fire mud bonding, and the cover plate 4 is fixed to the upper end of the outer sleeve 3 by fire mud bonding and is flush with the upper end surface of the inner tube 5.
[0034] The inner hole of the outer sleeve 3 is a stepped hole, the large aperture of the stepped hole is on the side of the large end of the nozzle, and the outer circle of the inner core 5 is matched and connected with the inner hole of the outer sleeve 3.
[0035] The upper end surface of the outer sleeve 3 is provided with a groove, and the cover plate 4 is plugged and fixed with the upper end surface of the outer sleeve 3 and the groove.
[0036] The groove is arranged on one side of the inner hole of the outer sleeve 3 .
[0037] The maximum thickness of the inner core 5 is 2.5 to 3.5 times the thickness eroded during the use cycle.
[0038] 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 jacket 3 for filling with fire clay, and a gap of 0.5-1.5 mm is left between the outer jacket 3 and the inner core 5 for filling with fire clay. The gaps between the three parts of the split drain are the tolerance gaps when assembled, and special fire clay is used to fill the gaps when assembled.
[0039] A method for preparing a split partially reusable ladle drain nozzle comprises the following steps:
[0040] 1) After determining the sizes of the three parts of the split drain, each part of the drain can be manufactured separately. After the manufacturing is completed, it is assembled. During the assembly, first use a clamp to fix the outer jacket 3 equipped with a steel shell, and then apply a layer of fire clay with a thickness of 2 to 3 mm on the outer surface of the inner core 5, put the inner core 5 into the outer jacket 3 and compact it so that the inner core reaches the position specified by the outer jacket 3.
[0041] 2) Apply a layer of fire clay with a thickness of 2 to 3 mm on the lower surface and inner side of the cover plate 4, put it into the outer jacket 3 from top to bottom and compact it so that the cover plate 4 reaches the position specified by the outer jacket 3, and then wipe off the excess fire clay squeezed out with a rag. The split drain is now assembled.
[0042] 3) Put the assembled split drain into a drying kiln at 110-150° C. and dry it for 5-8 hours. Then the split drain is completed and a new split drain is obtained.
[0043] 4) After the split drain is used on the ladle, remove it with a tool, let it cool, and then place the large end of the drain downward on a hollow fixture; 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, so that the remaining inner core 5 will fall out of the outer sleeve 3, and then use a tool to remove the cover plate 4, leaving only the outer sleeve 3.
[0044] 5) Use tools to clean the remaining impurities on the inside and outside of the jacket 3, so that a qualified jacket 3 is obtained, and then repeat steps 1)-3) to obtain a new split drain, so that the drain jacket 3 part is reused after use, and so on, repeat the cycle until the jacket 3 is damaged.
[0045] The fire clay is a mixture of 80-90 parts of 325 mesh white corundum powder, 6-10 parts of 100 mesh graphite powder, 5-10 parts of dextrin and 5-10 parts of water by weight. The fire clay has a strong bonding effect at room temperature, does not melt at high temperature (the high temperature working temperature of the ladle outlet is 1500-1600°C), and keeps the various parts from sintering together.
[0046] The cover plate 4 and the 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 and vibration; the steel shell 1 is made of Q235 steel.
[0047] The split ladle drain of the present invention is composed of the following three parts: a cover plate 4, an inner core 5, and an outer shell 3. After the cover plate 4, the inner core 5 and the outer shell 3 are assembled, a split ladle drain is formed, which is different from the traditional ladle drain (see Figure 1 ) are of the same shape and size.
[0048] The inner hole diameter of the inner core 5 is the diameter of the flow steel channel of the drain, and the height is the same as the drain. The maximum outer diameter of the inner core 5 is determined according to the erosion thickness of the drain after a period of use. The principle is that the maximum thickness of the inner core 5 is about 3 times the erosion thickness. For example, if the erosion thickness of the drain is 10㎜, then the maximum outer diameter of the inner core 5 is the flow steel channel diameter + 60mm. The outer diameter of the small diameter cylinder at the bottom of the outer cone of the inner core 5 is 10 to 20㎜ smaller than the outer diameter of the large diameter cylinder at the top. The height of the small diameter cylinder at the bottom of the cone of the inner core 5 is 40 to 80㎜.
[0049] Specific implementation example (taking a 260-ton ladle of a steel plant as an example):
[0050] 1. According to the drawing dimensions of the steel plant's drain outlet and the observation of the erosion thickness of the drain outlet after one service cycle of the steel plant, the dimensions of each part of the split drain outlet are determined.
[0051] 2. The split type drain is composed of the following three parts: a cover plate 4, an inner core 5, and an outer shell 3. The cover plate 4, the inner core 5, and the outer shell 3 are combined into a split ladle drain, which has the same shape and size as the original ladle drain of the steel plant.
[0052] 3. The inner diameter of the inner core 5 is the diameter of the steel channel of the drain, and the height is the same as the original drain. By observing that the erosion thickness of the drain of this steel plant is 10mm, the maximum outer diameter of the inner core 5 is the steel channel diameter + 60mm. The small outer diameter of the lower part of the inner core 5 is 20mm smaller than the large outer diameter of the upper part, and the height of the small outer diameter cylindrical part of the lower part of the inner core 5 is 50mm.
[0053] 4. The cover plate 4 is a composite shape of a truncated cone with an inner hole. The upper surface shape of the cover plate 4 is the same as the upper part of the original drain. There is a 1.5mm gap between the adjacent parts of the cover plate 4 and the inner core 5, and there is a 1.5mm gap between the adjacent parts of the cover plate 4 and the outer sleeve 3.
[0054] 5. When the sizes of the inner core 5 and the cover plate 4 are determined, the remaining shape of the drain outlet is the outer shell 3. There is a gap of 1.5 mm between the adjacent parts of the outer shell 3 and the inner core 5 and the cover plate 4.
[0055] 6. The gap between the three parts of the split drain is the tolerance gap during assembly, and special fire clay is used to fill the gap during assembly.
[0056] 7. The cover plate 4 and the inner core 5 are made of aluminum carbon material and are formed by machine pressing.
[0057] 8. The steel shell 1 is made of Q235 steel, and the outer shell 3 is made of corundum mullite, and is formed by casting and vibration.
[0058] 9. The special fire clay used for filling the joints is a mixture of 84 parts of white corundum powder 325 mesh, 10 parts of graphite powder 100 mesh, 6 parts of dextrin and 7 parts of water (the above are weight parts). This fire clay has a strong bonding effect at room temperature, does not melt at high temperature, and keeps the various parts from sintering together.
[0059] 10. After determining the sizes of the three parts of the split drain, the various parts of the drain can be manufactured separately. After manufacturing is completed, they can be assembled. During assembly, first use a clamp to fix the outer jacket 3 assembled with the steel shell 1, and then apply a layer of fire clay with a thickness of about 3 mm on the outer surface of the inner core 5, and then place the inner core 5 into the outer jacket 3 and compact it so that the inner core 5 reaches the position specified by the outer jacket 3, and then apply a layer of fire clay with a thickness of about 3 mm on the lower surface and inner side of the cover plate 4, and place it into the outer jacket 3 from top to bottom and compact it so that the cover plate 4 reaches the position specified by the outer jacket 3, and then wipe off the excess fire clay squeezed out with a rag, so that the split drain is assembled, and then put the assembled split drain into a drying kiln at 150°C and dry it for 5 hours, and then the split drain is manufactured.
[0060] 11. When the split drain is used on the ladle, remove it with tools, let it cool, and then place it on a hollow fixture with the big end facing down. Place an iron rod with a diameter slightly smaller than the outer diameter of the inner core 5 on the inner core 5, and hit the iron rod with a hammer so that the inner core 5 remaining after use will fall out of the outer jacket 3. Then use tools to remove the cover plate 4, leaving only the outer jacket 3. Use tools to clean up the remaining impurities on the inside and outside of the outer jacket 3, so that a qualified outer jacket 3 is obtained. Then repeat the assembly and drying steps in step 10 to get a new split drain. This realizes the reuse of the outer jacket 3 of the drain after use. And so on, repeat the cycle until the outer jacket is damaged.
Claims
1. A split type partially reused ladle drain, characterized in that: It includes a cover plate, an inner core, an outer sleeve and a steel shell. The steel shell is fixedly sleeved on the outside of the outer sleeve and fixed by fire mud. The inner core is fixed to the inside of the outer sleeve by fire mud. The cover plate is fixed to the upper end of the outer sleeve by fire mud and is flush with the upper end surface of the inner cylinder.
2. A split type partially reused ladle drain according to claim 1, characterized in that: The inner hole of the outer sleeve is a stepped hole, the large aperture of the stepped hole is on the side of the large end of the nozzle, and the outer circle of the inner core is matched and connected with the inner hole of the outer sleeve.
3. The split partially reused ladle drain according to claim 1, characterized in that: The upper end surface of the outer sleeve is provided with a groove, and the cover plate is plugged and fixed with the upper end surface of the outer sleeve and the groove.
4. The split partially reused ladle drain according to claim 1, characterized in that: The groove is arranged on one side of the inner hole of the outer sleeve.
5. The split partially reused ladle drain according to claim 1, characterized in that: The maximum thickness of the inner core is 2.5 to 3.5 times the thickness eroded during the service life.
6. The split partially reused ladle drain according to claim 1, characterized in that: A gap of 0.5 to 1.5 mm is reserved between the cover plate and the inner core for filling with fire clay, a gap of 0.5 to 1.5 mm is reserved between the cover plate and the outer jacket for filling with fire clay, and a gap of 0.5 to 1.5 mm is reserved between the outer jacket and the inner core for filling with fire clay.
7. A method for preparing a split partially reusable ladle drain according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: 1) Apply a layer of fire clay with a thickness of 2 to 3 mm on the outer surface of the inner core, and put the inner core into the outer jacket and compact it; 2) Apply a layer of fire clay with a thickness of 2 to 3 mm on the lower surface and inner side of the cover plate, put it into the jacket from top to bottom and compact it, then wipe off the excess fire clay squeezed out with a rag; 3) Place the assembled drain in a drying kiln at 110-150°C and dry for 5-8 hours to make a new ladle drain; 4) After the split drain is used on the ladle, place the large end of the drain down on the hollow fixture; place an iron rod with a diameter smaller than the outer diameter of the inner core and larger than the inner diameter of the inner core on the inner core, hammer the iron rod, and the remaining inner core will fall out of the outer jacket, and then use tools to remove the cover; 5) Use tools to clean the remaining impurities on the inside and outside of the jacket, and then repeat steps 1) to 3) to get a new split drain.
8. The method for preparing a split partially reused ladle drain according to claim 7, characterized in that: The fire mud is prepared by mixing 80-90 parts of 325-mesh white corundum powder, 6-10 parts of 100-mesh graphite powder, 5-10 parts of dextrin and 5-10 parts of water in parts by weight.
9. The method for preparing a split partially reused ladle drain according to claim 7, characterized in that: The cover plate and the inner core are made of aluminum carbon material and are formed by machine pressing; the outer shell is a refractory material layer, made of corundum mullite, and is formed by casting and vibration; the steel shell is made of Q235 steel.