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CN-224215807-U - High-performance graphite flow guiding nozzle protective sleeve of copper liquid converter

CN224215807UCN 224215807 UCN224215807 UCN 224215807UCN-224215807-U

Abstract

The utility model relates to the technical field of copper liquid transportation, in particular to a high-performance copper liquid converter graphite flow guide nozzle protective sleeve, which comprises a composite protective shell coaxially sleeved with a graphite flow guide nozzle, wherein the composite protective shell sequentially comprises a high-temperature alloy contact layer, a gradient heat insulation layer, an external water cooling sleeve, a spiral cooling channel, a flange connection mechanism with a pressure sensor, a flow guide head, a wear-resisting strip, an intelligent monitoring system and a sealing gap, wherein the high-temperature alloy contact layer is coaxially sleeved with the graphite flow guide nozzle, the gradient heat insulation layer comprises a zirconia transition layer and an aluminum silicate fiber layer which are sintered and combined with the high-temperature alloy contact layer, the spiral cooling channel is arranged in the external water cooling sleeve, the liquid inlet end of the composite protective shell is provided with the flange connection mechanism, the liquid outlet end of the composite protective shell is provided with the flow guide head, the inner wall of the composite protective shell is embedded with the wear-resisting strip made of silicon carbide material, the flow guide head is connected with the composite protective shell in a labyrinth sealing mode, and the sealing gap is filled with high-temperature sealing paste, and the intelligent monitoring system is arranged on the outer wall of the composite protective shell, and the intelligent monitoring system is used for improving the working performance of the graphite flow guide nozzle in a high-temperature and high-corrosion environment.

Inventors

  • YAO YILONG
  • PANG HONGYUN
  • YANG XUEPENG
  • LI YANG

Assignees

  • 常州润来科技有限公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (8)

  1. 1. The utility model provides a high performance copper liquid converter graphite water conservancy diversion mouth protective sheath, its characterized in that includes compound protection casing (1) that cup joints with graphite water conservancy diversion mouth is coaxial, compound protection casing (1) includes from inside to outside in proper order: the inner surface of the high-temperature alloy contact layer (11) is in clearance fit with the graphite flow guide nozzle to form an expansion buffer clearance of 0.5-2 mm; A gradient heat insulating layer (12) comprising a zirconia transition layer (121) and an aluminum silicate fiber layer (122) sintered to the superalloy contact layer (11); An external water cooling jacket (13) with a spiral cooling channel inside; the liquid inlet end of the composite protective shell (1) is provided with a flange connecting mechanism (2); The liquid outlet end of the composite protection shell (1) is provided with a flow guide head (3), the inner wall of the flow guide head (3) is embedded with a wear-resistant strip (31) made of silicon carbide, the wear-resistant strip (31) and the axis are arranged at a deflection angle of 10-15 degrees, the flow guide head (3) and the composite protection shell (1) are in labyrinth sealing connection, and a sealing gap is filled with high-temperature sealing paste; The outer wall of the composite protection shell (1) is provided with an intelligent monitoring system (4).
  2. 2. The high-performance graphite flow guiding nozzle protective sleeve of the molten copper converter as claimed in claim 1, wherein the superalloy contact layer (11) is made of nickel-based superalloy, and an equidistant distributed groove array is arranged on the inner surface of the superalloy contact layer to form a gas heat insulation layer.
  3. 3. The high-performance graphite guide nozzle protective sleeve of a molten copper converter according to claim 1, wherein the porosity of the zirconia transition layer (121) is changed in a gradient manner, the porosity of the side close to the superalloy contact layer (11) is 15-20%, the porosity of the side close to the aluminum silicate fiber layer (122) is 30-35%, and the thickness ratio is 1:2.
  4. 4. The high performance molten copper converter graphite flow nozzle protective sleeve of claim 1 wherein the pitch of the helical cooling channel decreases progressively in the direction of flow of the molten copper.
  5. 5. The high-performance graphite guide nozzle protective sleeve of a molten copper converter according to claim 1, wherein the flange connection mechanism (2) comprises: A mounting flange (21) with a graphite sealing ring; the locking force of the hydraulic locking devices (22) which are uniformly distributed on the circumference can be dynamically adjusted along with the detection value of the pressure sensor (23); and the anti-sputtering retainer ring (24) has an inclination angle of 30-45 degrees.
  6. 6. The high performance molten copper converter graphite flow nozzle protective sleeve of claim 1, wherein said intelligent monitoring system (4) comprises: an embedded temperature sensor array (41) arranged axially at equal angles in at least 3 groups; A vibration monitoring module (42) for detecting an axial vibration frequency using an accelerometer; And a thickness detector (43) which adopts an ultrasonic thickness measuring probe.
  7. 7. The high-performance graphite guide nozzle protective sleeve of the molten copper converter as claimed in claim 6, wherein the intelligent monitoring system (4) is connected with an early warning terminal, and an alarm is triggered when any one of the following conditions is met: the temperature gradient change rate is more than 5 ℃ per second; Vibration frequency >200Hz and duration >10s; The local thickness reduction is > 15% of the design thickness.
  8. 8. The high-performance graphite guide nozzle protective sleeve of the molten copper converter according to claim 1, wherein inert gas is filled in the expansion buffer gap, and pressure balance is achieved through micropores formed in the superalloy contact layer (11).

Description

High-performance graphite flow guiding nozzle protective sleeve of copper liquid converter Technical Field The utility model relates to the technical field of copper liquid transfer, in particular to a high-performance graphite flow guiding nozzle protective sleeve of a copper liquid converter. Background In the modern metallurgical industry, a copper liquid converter is one of key equipment, and efficient and stable operation of the copper liquid converter is important to ensure continuous production and product quality. One of the core components of the molten copper converter is a graphite flow guiding nozzle protective sleeve, which not only plays a role in guiding high-temperature molten copper to flow, but also plays a role in protecting the converter lining from direct thermal shock and physical abrasion. However, when working in a long-time high-temperature environment, and when frequently contacting with high-speed flowing copper liquid, the flow guiding nozzle protective sleeve gradually has the problems of pore enlargement, reduced thermal conductivity, aggravated deformation, surface abrasion and the like, and the factors directly influence the service life and the safety of the flow guiding nozzle protective sleeve. Disclosure of utility model In order to solve the technical problems, the utility model provides a high-performance graphite guide nozzle protective sleeve for a copper liquid converter, which improves the working performance of the graphite guide nozzle in a high-temperature and high-aggressiveness environment. The utility model relates to a high-performance graphite flow guiding nozzle protective sleeve of a copper liquid converter, which comprises a composite protective shell coaxially sleeved with the graphite flow guiding nozzle, wherein the composite protective shell sequentially comprises the following components from inside to outside: The inner surface of the high-temperature alloy contact layer is in clearance fit with the graphite flow guide nozzle to form an expansion buffer clearance of 0.5-2 mm; The gradient heat insulation layer comprises a zirconium oxide transition layer and an aluminum silicate fiber layer which are sintered and combined with the high-temperature alloy contact layer; The external water cooling jacket is internally provided with a spiral cooling channel; the liquid inlet end of the composite protective shell is provided with a flange connecting mechanism; The liquid outlet end of the composite protection shell is provided with a flow guide head, the inner wall of the composite protection shell is embedded with wear-resistant strips made of silicon carbide, the wear-resistant strips are arranged at a deflection angle of 10-15 degrees with the axis, the flow guide head is connected with the composite protection shell in a labyrinth seal way, a sealing gap is filled with high-temperature sealing paste, and the softening point of the sealing paste is not lower than 800 ℃; the outer wall of the composite protection shell is provided with an intelligent monitoring system. Further, the superalloy contact layer adopts nickel-based superalloy, the inner surface of the superalloy contact layer is provided with groove arrays distributed at equal intervals, and the depth of the grooves is 0.3-0.8mm, so that a gas heat insulation layer is formed. Preferably, the porosity of the zirconia transition layer is in gradient change, the porosity of the zirconia transition layer close to the high-temperature alloy contact layer is 15-20%, the porosity of the zirconia transition layer close to the aluminum silicate fiber layer is 30-35%, and the thickness ratio is 1:2. Further, the pitch of the spiral cooling channel is gradually reduced along the flowing direction of the copper liquid, the pitch of the inlet end is 1.2-1.5 times of that of the outlet end, and the cross section of the channel is in a water drop shape. Preferably, the flange connection mechanism includes: A mounting flange with a graphite sealing ring; the locking force of the hydraulic locking devices which are uniformly distributed on the circumference can be dynamically adjusted along with the detection value of the pressure sensor; the anti-sputtering check ring has an inclination angle of 30-45 degrees. Further, the intelligent monitoring system includes: an embedded temperature sensor array, at least 3 groups are arranged along the axial equal angle; The vibration monitoring module is used for detecting axial vibration frequency by adopting an accelerometer; The thickness detector adopts an ultrasonic thickness measuring probe. Preferably, the intelligent monitoring system is connected with an early warning terminal, and the intelligent monitoring system triggers an alarm when any one of the following conditions is met: the temperature gradient change rate is more than 5 ℃ per second; Vibration frequency >200Hz and duration >10s; The local thickness reduction is > 15% of the design thickness. Furthe