Steel ladle upper nozzle brick
By combining the upper and lower sections of the nozzle brick with a rigid inner lining, the problems of short lifespan and heavy weight of the nozzle bricks on the ladle are solved, achieving convenient replacement and reduced costs.
Patent Information
- Application Number
- CN202520287214.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-22
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-22
AI Technical Summary
The existing steel ladle inlet bricks have a short service life, leading to frequent replacements, which increases costs and labor intensity, and their overall weight makes them inconvenient to transport.
The design employs a combination of upper and lower sections of the sprue brick, connected by a fire-clay bonding layer, and incorporates a rigid inner lining and a limiting step structure. This reduces the weight of the brick and increases its service life, allowing for individual component replacement to extend its lifespan.
This improved the utilization rate and service life of the inlet bricks, reduced the frequency of replacement and transportation difficulties, and achieved cost-effectiveness.
Smart Images
Figure CN223902918U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the steel ladle sliding mechanism supporting part field of iron and steel smelting industry, especially, relate to a steel ladle upper nozzle brick. BACKGROUND
[0002] The upper nozzle brick is located in the steel ladle seat brick, the upper end is contacted with the seat brick inner hole upper wall by the jointing fire clay, and the lower end big round surface is flush with the mechanism base inner plane. In the steel pouring process, the high temperature, high speed molten steel flows into from the seat brick hole, flows through along the upper nozzle casting hole, and the upper nozzle is seriously eroded by the molten steel in this process, leading to the average service life of the upper nozzle is generally about ten times. The previous upper nozzle brick reaches certain furnace number, needs to knock off the whole upper nozzle and replace the new upper nozzle brick. The existing upper nozzle brick is the whole nozzle, and once the upper nozzle is seriously eroded by the molten steel, the whole upper nozzle needs to be replaced, and the cost maximization cannot be realized. With the increase of raw material cost and the depression of the steel market, according to the principle of reducing cost and increasing benefit, the service life and utilization rate of the upper nozzle brick are required to be improved. Moreover, with the increase of the tonnage of the steel ladle, the single weight of the upper nozzle brick also increases, and the whole upper nozzle used for the steel ladle with a tonnage of more than 230 tons is generally heavy, so that the brick machine worker spends a lot of time and effort in carrying the lower frame from the workbench during the forming, which is not conducive to efficient forming. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the above problems, the utility model provides a steel ladle upper nozzle brick.
[0004] The technical scheme of the utility model is: a steel ladle upper nozzle brick, which comprises a nozzle brick upper section and a nozzle brick lower section matched in size, the lower end surface of the nozzle brick upper section and the upper end surface of the nozzle brick lower section are connected through a fire clay connecting layer, the nozzle brick upper section is internally provided with an upper casting hole passage, the nozzle brick lower section is internally provided with a lower casting hole passage butted with the upper casting hole passage, the nozzle brick upper section is integrally sleeved in the seat brick, the upper part of the nozzle brick lower section is sleeved in the seat brick, and the lower part of the nozzle brick lower section is sleeved in the mechanism base; a mounting plate is sleeved between the mechanism base and the seat brick; and a jointing fire clay layer is arranged between the outer side surfaces of the nozzle brick upper section and the nozzle brick lower section and the seat brick.
[0005] Preferably, a hard inner lining layer is compounded or inlaid in the upper casting hole passage of the nozzle brick upper section, and the inner passage of the hard inner lining layer is matched in size with the lower casting hole passage.
[0006] Preferably, the inner passage of the hard inner lining layer is smaller in size than the inner passage of the seat brick, and the upper part of the inner passage of the hard inner lining layer is provided with a taper.
[0007] Preferably, a limiting step is arranged on the lower part of the outer side surface of the nozzle brick lower section, and a step structure is matched and arranged in the butt joint through hole in the middle part of the mechanism base.
[0008] Preferably, the height size of the nozzle brick lower section is smaller than the height size of the nozzle brick upper section.
[0009] Preferably, the thickness of the mortar connecting layer is between 1-2mm.
[0010] Preferably, the material strength of the upper nozzle brick section is superior to that of the lower nozzle brick section.
[0011] The beneficial technical effects of the utility model are: the upper nozzle brick is combined and connected by the upper nozzle brick section and the lower nozzle brick section, the volume and weight of the upper nozzle brick monomer are reduced, the brick body manufacturing quality and the convenience of transportation after production and molding are improved, the upper section or the lower section of the upper nozzle brick can be replaced according to the erosion condition after a certain number of furnaces are used, the utilization rate and service life of the upper nozzle brick are improved, and the effect of reducing cost and increasing benefit is achieved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is the structural schematic diagram of the utility model in the assembled state;
[0013] Figure 2 is the structural schematic diagram of the utility model;
[0014] Figure 3 is the structural schematic diagram of the lower nozzle brick section;
[0015] Figure 4 is the structural schematic diagram of the upper nozzle brick section.
[0016] In the drawing, 1. upper nozzle brick section, 11. hard inner lining layer, 12. upper casting hole passage, 2. lower nozzle brick section, 21. lower casting hole passage, 22. limiting step, 3. mortar connecting layer, 4. joint mortar layer, 5. mechanism base, 6. mounting plate, 7. seat brick. DETAILED DESCRIPTION
[0017] Example one, referring to the attached Figures 1-4 A tundish upper nozzle brick, comprising a size-matched upper nozzle brick section 1 and a lower nozzle brick section 2, the lower end face of the upper nozzle brick section and the upper end face of the lower nozzle brick section 2 are connected through a mortar connecting layer 3, the mortar connecting layer is high-temperature-resistant mortar, the upper nozzle brick section 1 is internally provided with an upper casting hole passage 12, the lower nozzle brick section is internally provided with a lower casting hole passage 21 that is connected with the upper casting hole passage 12, the upper casting hole passage and the lower casting hole passage are coaxially connected, the combined and connected structure of the upper nozzle brick section 1 and the lower nozzle brick section 2 reduces the volume and weight of the upper nozzle brick monomer, is beneficial to improving the brick body manufacturing quality and the convenience of transportation after production and molding, and after a certain number of furnaces are used, the upper section or the lower section of the upper nozzle brick can be replaced according to the erosion condition, the utilization rate and service life of the upper nozzle brick are improved.
[0018] The upper section 1 of the nozzle brick is wholly sleeved in the seat brick 7, the upper part of the lower section 2 of the nozzle brick is sleeved in the seat brick 7, the lower part of the lower section 2 of the nozzle brick is sleeved in the mechanism base 5, the installation plate 6 is sleeved between the mechanism base 5 and the seat brick 7, the outer side surface of the upper section 1 of the nozzle brick and the lower section 2 of the nozzle brick and the seat brick 7 are provided with the fire clay layer 4 for filling gaps, and the fire clay layer is high-temperature-resistant fire clay.
[0019] The lower part of the outer side surface of the lower section 2 of the nozzle brick is provided with a limiting step 22, and a step structure is matched and arranged in the butt joint through hole in the middle part of the mechanism base 5, and the limiting step 22 structure between the two can improve the assembly stability of the upper nozzle brick.
[0020] The height dimension of the lower section 2 of the nozzle brick is smaller than the height dimension of the upper section 1 of the nozzle brick, and the thickness of the fire clay connecting layer 3 is between 1-2 mm.
[0021] The material strength of the upper section 1 of the nozzle brick is better than that of the lower section 2 of the nozzle brick, the upper section 1 of the nozzle brick is preferentially contacted with molten steel, and in order to reduce the cost, the upper section 1 of the nozzle brick is formed by using raw materials with good thermal shock stability, good resistance to erosion and good resistance to corrosion.
[0022] When the upper nozzle brick of the ladle is used in the field, when the use of the upper nozzle brick reaches a certain number of furnaces, after observation, if the erosion of the upper section 1 of the nozzle brick is not serious enough and the erosion of the lower section 2 of the nozzle brick is serious, the lower section 2 of the nozzle brick and the connecting layer can be knocked off by a pneumatic pick, the fire clay connecting layer 3 and the fire clay layer 4 for filling gaps are re-coated, and the new lower section 2 of the nozzle brick is installed; if it is observed that the erosion of the upper section 1 of the nozzle brick is serious enough and the erosion of the lower section 2 of the nozzle brick is light, the upper and lower sections can be pulled out as a whole by using a puller, the new upper section 1 of the nozzle brick is replaced, and enough fire clay connecting layer 3 is coated on the butt joint surface, the upper and lower sections are assembled in series by using a special tool, the fire clay layer 4 for filling gaps is coated on the outer surface of the upper nozzle brick as a whole, and then the upper nozzle brick is installed in the nozzle hole of the seat brick 7 for use.
[0023] In the embodiment two, referring to the accompanying drawings, Figure 2 The embodiment is basically the same as the embodiment one, and the same parts will not be described herein. The difference is that the upper casting hole passage 12 of the upper section 1 of the nozzle brick is compounded or inlaid with a hard inner lining layer 11, the inner lining layer is usually a zirconia layer, the inner passage of the hard inner lining layer 11 is matched with the lower casting hole passage 21 in size, and the inner lining layer is used to improve the erosion resistance of the upper section 1 of the nozzle brick and further improve the service life of the upper section 1 of the nozzle brick.
[0024] The inner passage of the hard inner lining layer 11 is slightly smaller than the inner passage of the seat brick 7 to increase the compounding or inlaying thickness of the hard inner lining layer 11, and the upper part of the inner passage of the hard inner lining layer 11 is provided with a taper, the taper makes the upper end of the upper section 1 of the nozzle brick form a horn-shaped flow guide structure, and the horn-shaped flow guide structure can produce the effect of guiding and draining the molten steel.
Claims
1. A ladle nozzle brick characterized by: The nozzle brick upper section and the nozzle brick lower section are connected by a clay connecting layer between the lower end surface of the nozzle brick upper section and the upper end surface of the nozzle brick lower section, the nozzle brick upper section is internally provided with an upper casting hole passage, the nozzle brick lower section is internally provided with a lower casting hole passage which is butted with the upper casting hole passage, the nozzle brick upper section is wholly sleeved in the seat brick, the upper part of the nozzle brick lower section is sleeved in the seat brick, the lower part of the nozzle brick lower section is sleeved in the mechanism base, the mechanism base and the seat brick are sleeved with a mounting plate, and a jointing clay layer is arranged between the outer side surface of the nozzle brick upper section and the nozzle brick lower section and the seat brick.
2. A nozzle brick for a ladle according to claim 1, characterized in that: The upper casting hole passage of the nozzle brick upper section is internally provided with a hard inner lining layer, and the internal passage of the hard inner lining layer is matched in size with the lower casting hole passage.
3. A nozzle brick according to claim 2, characterised in that: The internal passage of the hard inner lining layer is smaller in size than the internal passage of the seat brick, and the upper part of the internal passage of the hard inner lining layer is provided with a taper.
4. A nozzle brick for a ladle according to claim 1, characterized in that: The outer side surface of the nozzle brick lower section is provided with a limiting step at the lower part, and a step structure is matched and arranged in the butting through hole of the middle part of the mechanism base.
5. A nozzle brick for a ladle according to claim 1, characterized in that: The height size of the nozzle brick lower section is smaller than the height size of the nozzle brick upper section.
6. A nozzle brick for a ladle according to claim 1, characterized in that: The thickness of the clay connecting layer is between 1 and 2 mm.
7. A nozzle brick for a ladle according to claim 1, characterized in that: The material strength of the nozzle brick upper section is superior to the material strength of the nozzle brick lower section.