Search

CN-121973325-A - Slow cooling device for fused zirconia corundum bricks

CN121973325ACN 121973325 ACN121973325 ACN 121973325ACN-121973325-A

Abstract

The invention discloses a slow cooling device for fused zirconia-corundum bricks, which comprises a frame, a transverse conveying mechanism, a longitudinal conveying mechanism and a stepped slow cooling mechanism, wherein two ends of the frame are respectively provided with a die releasing end and a die taking end, the transverse conveying mechanism comprises a plurality of support cooling rollers which are rotatably arranged on the frame and are arranged along the width direction of the frame, the support cooling rollers are used for supporting the fused zirconia-corundum bricks and enabling the fused zirconia-corundum bricks to reciprocate, the longitudinal conveying mechanism is arranged on the frame and comprises a plurality of driving shafts, and driving rods which penetrate through the support cooling rollers are fixed on the driving shafts. The invention realizes the comprehensive cooling of the bottom of the sand mould by supporting the cooling roller, realizes synchronous cooling by combining the upper fan and the refrigerating pipe, reduces the temperature gradient, improves the qualification rate of products, forms stepped cooling by utilizing a plurality of groups of fans and the snakelike refrigerating pipe, does not need an additional temperature control component, ensures that the sand mould is conveyed one by driving the driving rod, does not interfere with each other, and improves the production efficiency.

Inventors

  • ZHENG YAQI
  • WU JINSHENG
  • LIU YANWEI
  • JIA JUNCHAO

Assignees

  • 河南振亚新材料有限公司

Dates

Publication Date
20260505
Application Date
20260328

Claims (10)

  1. 1. The slow cooling device for the fused zirconia corundum bricks comprises a frame (1), wherein two ends of the frame are respectively provided with a mould releasing end (2) and a mould taking end (3), and is characterized by further comprising; the transverse conveying mechanism comprises a plurality of supporting cooling rollers (25) which are rotatably arranged on the frame (1) and are arranged along the width direction of the frame (1), and the supporting cooling rollers (25) are used for supporting and enabling the fused zirconia corundum bricks to reciprocate; A plurality of longitudinal conveying mechanisms are arranged on the frame (1) and comprise driving shafts (24), and driving rods (22) which are arranged through supporting cooling rollers (25) are fixed on the driving shafts (24); The step slow cooling mechanism comprises a plurality of fans (5) arranged above the frame (1), and a refrigerating pipe (23) for conveying cooling liquid is arranged below the fans (5).
  2. 2. The slow cooling device for the fused zirconia corundum bricks according to claim 1, wherein two supporting plates (7) are arranged at the bottom of the frame (1), two ends of the driving shaft (24) penetrate through the two supporting plates (7) and are rotatably arranged with the two supporting plates, a plurality of driving shafts (24) are provided with first driving wheels (20), and two adjacent first driving wheels (20) are connected through a first belt (19).
  3. 3. The slow cooling device for the fused zirconia corundum brick according to claim 1, wherein the frame (1) is provided with a mounting groove (6), a plurality of rotating pipes (27) penetrating through the frame (1) are arranged in the mounting groove (6), and the supporting cooling roller (25) is sleeved outside the rotating pipes (27) and fixedly arranged; The rotating pipe (27) is provided with a second driving wheel (30), and two adjacent second driving wheels (30) are connected through a second driving belt (29).
  4. 4. A slow cooling device for fused zirconia corundum bricks according to claim 1, characterized in that a driving space (26) is formed between two adjacent supporting cooling rollers (25), and the driving rod (22) is arranged through the driving space (26).
  5. 5. The slow cooling device for the fused zirconia corundum brick according to claim 1, wherein the refrigerating pipe (23) is a plurality of groups of coiled pipes which are connected in series, and a plurality of the coiled pipes are respectively arranged opposite to a plurality of fans (5).
  6. 6. A slow cooling device for an electric fused zirconia corundum brick according to claim 3, characterized in that a fixing frame (4) is installed on the frame (1), a groove body is arranged on the fixing frame (4), and the fan (5) is fixedly installed in the groove body.
  7. 7. The slow cooling device of the fused zirconia corundum brick according to claim 6, further comprising a supply mechanism for supplying cooling liquid into the cooling pipe (23), wherein the supply mechanism comprises a piston cylinder (9) and a cooling liquid tank (8) which are arranged on the fixed frame (4), a movable piston (31) is connected in a sliding manner in the piston cylinder (9), a connecting rod (11) is connected on the movable piston (31) in a hinged manner, one driving shaft (24) is fixedly provided with a circular plate (10), the connecting rod (11) is connected on the circular plate (10) in a hinged manner, and the hinged position is deviated from the center of the circular plate (10); The cooling liquid tank (8) is connected with the piston cylinder (9) through the liquid inlet pipe (13), the piston cylinder (9) is connected with the refrigerating pipe (23) through the liquid outlet pipe (14), and the other end of the refrigerating pipe (23) is connected with the cooling liquid tank (8) through the return pipe (12).
  8. 8. The slow cooling device for the fused zirconia corundum bricks according to claim 1, wherein two ends of the rotating pipe (27) are respectively provided with a guide cover (28) which is in sealed rotation with the rotating pipe, the two guide covers (28) are respectively connected with a first conveying pipe (15) and a second conveying pipe (16), the first conveying pipe (15) is connected with a cooling liquid tank (8), and the second conveying pipe (16) is connected with a liquid outlet pipe (14).
  9. 9. A slow cooling device for fused zirconia corundum bricks according to claim 2, characterized in that the supporting plate (7) is provided with a motor (21), and the output end of the motor (21) is connected with one of the driving shafts (24).
  10. 10. The slow cooling device for the fused zirconia corundum brick according to claim 1, wherein the driving rod (22) is arc-shaped, and a tetrafluoro tube is fixed on the outer wall of the driving rod (22).

Description

Slow cooling device for fused zirconia corundum bricks Technical Field The invention relates to the technical field of processing of fused zirconia-corundum bricks, in particular to a slow cooling device of fused zirconia-corundum bricks. Background The fused zirconia corundum brick is a high-performance refractory material which is prepared by taking alumina and zirconia as main raw materials, carrying out high-temperature melting and casting molding and then carrying out slow cooling treatment, has excellent characteristics of high temperature resistance, corrosion resistance, scouring resistance and the like, and is widely applied to high-temperature operation scenes such as glass melting furnaces, metallurgical furnaces, chemical reaction kettles and the like. The slow cooling treatment is a key procedure in the production process of the fused zirconia corundum brick, and has the core effects of gradually reducing the temperature of a sand mould, effectively eliminating the thermal stress generated by overlarge temperature gradient in the brick, avoiding the defects of cracking, deformation and the like of the sand mould, and guaranteeing the mechanical property and the service life of the product, so that the cooling uniformity and the stability of the slow cooling device directly determine the product qualification rate of the fused zirconia corundum brick. At present, a main stream of electric smelting zirconia corundum brick slow cooling device in the industry mostly adopts a structure that a conveyor belt is used for conveying and is combined with a plurality of groups of cooling fans for blowing, high-temperature molten materials are cast into a sand mould and then are placed on the conveyor belt, and pass through a slow cooling area along with the conveyor belt in sequence, and the cooling fans are used for blowing air to the surface of the sand mould to realize cooling. However, in the practical application process, the traditional slow cooling device has two prominent problems, which seriously affect the slow cooling effect and the production economy, and are difficult to meet the production requirements of large scale and high quality. On the one hand, the problem of insufficient and uneven cooling of the bottom of the sand mould is particularly remarkable. Because the sand mould is required to be placed on the conveyer belt for conveying and slow cooling, the bottom of the sand mould is closely attached to the surface of the conveyer belt, and the conveyer belt forms a shielding screen, cooling air flow cannot effectively reach the bottom of the sand mould, and heat dissipation of the bottom of the sand mould is blocked. The other side surfaces (top surface and side surfaces) of the sand mould can be directly cooled by the cooling air, so that the difference of cooling rates of all parts of the sand mould is remarkable, the bottom temperature is slowly reduced, larger inner and outer and upper and lower temperature gradients are formed, and further the thermal stress concentration in the sand mould is initiated, so that the defects of cracks, corner breakage and the like at the bottom of the sand mould are easily caused, the product percent of pass is reduced, and the production cost is increased. Meanwhile, the insufficient bottom cooling can prolong the whole slow cooling period, influence the production efficiency and are difficult to adapt to the rhythm of mass production. On the other hand, in order to realize gradient slow cooling and avoid damage to the sand mould due to quenching, the traditional device generally needs to be provided with a plurality of groups of cooling fans, and carries out differential temperature control on each group of fans, and the temperature of the sand mould is gradually reduced through a plurality of cooling air sources with different temperatures. The structure of the multi-fan differential temperature control not only needs to additionally configure a plurality of sets of temperature control components and increases the hardware acquisition cost of the device, but also improves the installation and debugging difficulty and the later maintenance cost of the device, namely the coordinated operation of a plurality of sets of fans and the temperature control components is easy to fail, the trouble shooting and maintenance are time-consuming and labor-consuming, and the burden of production operation and maintenance is further increased. In addition, the layout of the multiple fans also occupies more production space, has higher requirements on workshop sites and is not beneficial to reasonable planning of production workshops. Therefore, the application provides a slow cooling device for an electric fused zirconia corundum brick. Disclosure of Invention The invention aims to solve the technical problems and provides a slow cooling device for an electric fused zirconia corundum brick. In order to achieve the above purpose, the present invention adopts the foll