A mixing bin and mixing method for preparing protective slag

Abstract

The present invention relates to the technical field of protective slag production equipment, and specifically discloses a mixing bin for preparing protective slag and a mixing method. The mixing bin for preparing protective slag of the present invention comprises: a frame, a stirring assembly, a mixing bin is fixedly connected to the frame, a driving assembly is provided on the frame, the driving assembly is used to drive the stirring assembly to operate, the bottom of the mixing bin has two symmetrically distributed arc surface structures, the stirring assembly comprises a rotating shaft and a stirring rod, there are two rotating shafts, and they are respectively located at the centers of the two arc surfaces, a plurality of stirring rods are distributed at intervals along the circumference of the rotating shaft to form a stirring rod group, and a plurality of stirring rod groups are distributed at intervals along the axial direction of the rotating shaft; the mixing bin for preparing protective slag and the mixing method of the present invention are stirred by rotating the stirring rod in the mixing bin, and the bottom material can be stirred during the stirring process to prevent material deposition.

Description

Technical Field

[0001] The present invention relates to the technical field of protective slag production equipment, and in particular to a mixing bin for preparing protective slag and a mixing method. Background Art

[0002] Polsh is a material added to the surface of the molten steel in the crystallizer during the continuous casting process. It is mainly composed of various compounds, such as CaO, SiO2, Al2O3, etc., and may contain fluxes such as Na2O, CaF2, etc. Under the heat released by the molten steel, the molten steel gradually heats up and sinters and melts, forming a multi-layer slag structure that covers the surface of the molten steel, thereby isolating the air and preventing the secondary oxidation of the molten steel. It also plays the role of heat insulation, purification of the molten steel, and lubrication of the billet shell.

[0003] In the related art, various raw materials, additives, water and other materials are uniformly mixed to prepare a protective slag with stable performance and meeting the requirements. In this process, a protective slag mixing equipment is generally used for mixing operations.

[0004] A Chinese patent with authorization announcement number CN220478640U discloses a mixing silo for preparing continuous casting protective slag, which includes a silo body, which includes a cylindrical section and a conical section at the bottom. A rotating shaft is provided at the axis of the silo body, and a motor is provided at the upper part of the silo body. The output shaft of the motor is connected to the rotating shaft. A cylinder coaxial with the rotating shaft is provided inside the silo body, and the shaft body of the rotating shaft is provided with spiral blades corresponding to the cylinder. The rotating shaft drives the spiral blades to rotate so that the material in the silo body is transported from bottom to top; a plurality of first stirring frames are evenly arranged around the center of the upper part of the rotating shaft, and a plurality of second stirring frames are evenly arranged around the center of the lower part of the rotating shaft.

[0005] The above patent drives the rotating shaft to rotate through a motor, and the first mixing frame and the second mixing frame rotate the material in a flat layer. At the same time, the rotating shaft also drives the spiral blades to rotate to transport the material from bottom to top, and flip the material up and down, so as to quickly mix the material, improve the material mixing efficiency, and ensure that the material is mixed evenly and consistently.

[0006] However, during the mixing process, due to the influence of factors such as the density of the material itself, it is easy to settle at the bottom of the silo, causing material stratification and affecting the quality of the protective slag. Summary of the invention

[0007] The present invention provides a mixing bin and a mixing method for preparing protective slag, aiming to solve the problem in the related art that materials are easily deposited, causing material stratification and affecting the quality of the protective slag.

[0008] The mixing bin for preparing protective slag of the present invention comprises: a frame, a stirring assembly;

[0009] A mixing bin is fixedly connected to the frame;

[0010] The stirring assembly is located in the mixing bin, and a driving assembly is provided on the frame, and the driving assembly is used to drive the stirring assembly to operate;

[0011] The bottom of the mixing bin is formed by two symmetrically distributed arc surface structures. The stirring assembly includes a rotating shaft and a stirring rod. There are two rotating shafts, which are respectively located at the centers of the two arc surfaces. Multiple stirring rods are distributed at intervals along the circumference of the rotating shaft to form a stirring rod group. Multiple groups of stirring rod groups are distributed at intervals along the axial direction of the rotating shaft. The stirring rod groups on the two rotating shafts are staggered. The ends of the stirring rods can stop against the arc surface structure. The spacing between the two rotating shafts is greater than the radius of the arc surface structure and smaller than the diameter of the arc surface structure.

[0012] Beneficial effect: The driving assembly drives the rotating shaft to rotate, and the rotating shaft drives the stirring rod to rotate. When the stirring rod rotates to the lower half of the mixing bin, its outer end will stop with the corresponding arc surface structure, so that the material at the bottom of the mixing bin can be turned over to prevent material deposition and thus prevent material stratification.

[0013] Preferably, the driving assembly includes a first driving member, a driving shaft, a driven shaft, a first gear, a second gear, a first belt and a second belt, the first driving member is arranged on the frame, the driving shaft and the driven shaft are both rotatably engaged on the frame, the first driving member is used to drive the driving shaft to rotate, the first gear is arranged on the driving shaft, the second gear is arranged on the driven shaft, the first gear is meshed with the second gear, the first belt is frictionally engaged with the driving shaft and one of the rotating shafts respectively, and the second belt is frictionally engaged with the driven shaft and the other rotating shaft respectively.

[0014] The effect is that the meshing between the first gear and the second gear causes the driving shaft and the driven shaft to rotate in opposite directions, thereby causing the two rotating shafts to rotate in opposite directions. When the stirring rods on the two rotating shafts rotate in opposite directions, they can move alternately. If the material is agglomerated, the stirring rods will pick up the material agglomerates and crush the material through the staggered movement of the stirring rods.

[0015] Preferably, an adjusting rod is rotatably engaged in the rotating shaft, a mating ring groove is provided on the circumferential side of the adjusting rod, a limiting ring is provided in the rotating shaft, the limiting ring is slidably engaged in the mating ring groove, and a second driving member is provided on the frame, the second driving member is used to drive the adjusting rod to move along its axial direction and drive the rotating shaft to move along its axial direction.

[0016] The effect is that the second driving member drives the adjusting rod to move back and forth along its axial direction, and the rotating shaft moves synchronously with the adjusting rod, so that the stirring position of the stirring rod can be adjusted to achieve uniform stirring of the materials in the mixing bin.

[0017] Preferably, the stirring rod is a hollow rod, a rotating rod is provided inside the stirring rod, a spiral blade is provided on the rotating rod, the rotating rod is rotatably connected to the stirring rod through a torsion spring, the end of the rotating rod passes through the rotating shaft and extends into the rotating shaft, a friction ring is provided on the side wall of the adjusting rod, the friction ring has a notch, and a friction wheel is provided at the end of the rotating rod, and the friction wheel is frictionally matched with the friction ring.

[0018] The effect is that during the rotation of the stirring rod, the friction wheel moves along the friction ring, thereby causing the rotating rod to rotate, the torsion spring accumulates force, and the spiral blade can push the material at the outer end of the stirring rod into the inside of the stirring rod. When the friction wheel moves to the notch of the friction ring, the friction wheel and the friction ring are disengaged, the torsion spring releases the elastic force, and the rotating rod is pushed to rotate in the opposite direction. The spiral blade rotates in the opposite direction and discharges the material in the stirring rod, thereby improving the material mixing efficiency.

[0019] Preferably, an opening is provided at the outer end of the side wall of the stirring rod, and the direction of the opening is the same as the rotation direction of the stirring rod, so that the material can enter the stirring rod through the opening.

[0020] Preferably, the side wall of the stirring rod has a plurality of granular structures distributed at intervals to form a rough surface, and the gap between adjacent stirring rod groups is greater than the width of the stirring rod, so that the stirring rod can break up the agglomerated materials during the stirring process.

[0021] The effect is that the outer surface of the stirring rod is a rough surface, which can improve the kneading ability of the stirring rod when the stirring rod crushes the material, and improve the ability of the stirring rod to crush the material agglomerates.

[0022] Preferably, the mixing bin has a feed inlet at the top and a discharge outlet at the bottom, and a sealing plate is slidably fitted at the discharge outlet.

[0023] A method for mixing mold slag, applied to the above-mentioned mixing bin for preparing mold slag, comprises the following steps:

[0024] The first step is raw material preparation, pouring various raw materials, additives and water into the mixing bin;

[0025] The second step is stirring and forming. The first driving member drives the two rotating shafts to rotate in opposite directions. The rotating shafts drive the stirring rods to rotate synchronously. The stirring rods stir the materials in the mixing bin.

[0026] The third step is discharging. After sufficient stirring, open the sealing plate and the formed material is discharged from the mixing bin from the discharging port.

[0027] Beneficial effect: The driving assembly drives the rotating shaft to rotate, and the rotating shaft drives the stirring rod to rotate. When the stirring rod rotates to the lower half of the mixing bin, its outer end will stop with the corresponding arc surface structure, so that the material at the bottom of the mixing bin can be turned over to prevent material deposition and thus prevent material stratification.

[0028] By adopting the above technical solution, the beneficial effects of the present invention are:

[0029] According to the mixing bin and mixing method for preparing protective slag of the present invention, the driving assembly drives the rotating shaft to rotate, and the rotating shaft drives the stirring rod to rotate. When the stirring rod rotates to the lower half of the mixing bin, its outer end will stop with the corresponding arc surface structure, so that the material at the bottom of the mixing bin can be turned over to prevent material deposition, thereby preventing material stratification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a mixing bin for preparing protective slag according to an embodiment of the present invention.

[0031] Figure 2 It is another schematic diagram of the structure of a mixing bin for preparing protective slag according to an embodiment of the present invention.

[0032] Figure 3 It is a cross-sectional view of a mixing bin for preparing protective slag according to an embodiment of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure of a stirring assembly according to an embodiment of the present invention.

[0034] Figure 5 Schematic diagram of the structure of the regulating rod according to an embodiment of the present invention.

[0035] Figure 6 4 is a cross-sectional view of a stirring assembly according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. Frame; 2. Mixing bin; 31. First driving member; 32. Driving shaft; 33. Driven shaft; 34. First gear; 35. Second gear; 36. First belt; 37. Second belt; 4. Rotating shaft; 41. Limiting ring; 5. Stirring rod; 6. Adjusting rod; 7. Second driving member; 8. Matching ring groove; 9. Rotating rod; 10. Spiral blade; 11. Friction ring; 12. Friction wheel; 13. Torsion spring; 14. Feed port. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figures 1 to 6 As shown, the mixing bin for preparing protective slag of the present invention comprises: a frame 1 and a stirring assembly.

[0040] Specifically, Figure 1 and Figure 3 As shown, a mixing bin 2 is fixedly connected to the frame 1, a feed port 14 is provided at the top of the mixing bin 2, a discharge port is provided at the bottom thereof, and a sealing plate is slidably matched at the bottom of the mixing bin 2, the sealing plate is located at the discharge port, and is used to control the opening and closing of the discharge port. A stirring assembly is arranged in the mixing bin 2, and a driving assembly is arranged on the frame 1, and the driving assembly is used to drive the stirring assembly to operate.

[0041] like Figure 3 As shown, the bottom of the mixing bin 2 is formed by splicing two curved surface structures with the same curvature, and the stirring assembly includes a rotating shaft 4 and a stirring rod 5.

[0042] like Figure 2 and Figure 3 As shown, there are two rotating shafts 4, which are respectively located at the centers of the two arc structures, each rotating shaft 4 is rotatably matched with the mixing bin 2, there are multiple stirring rods 5, and the multiple stirring rods 5 are evenly spaced along the circumference of the rotating shaft 4 to form a stirring rod group, and the multiple stirring rod groups are evenly spaced along the axial direction of the rotating shaft 4, and the gap between two adjacent stirring rod groups is greater than the width of the stirring rod 5. The outer end of the stirring rod 5 can stop against the inner wall of the arc surface, the distance between the two rotating shafts 4 is greater than the radius of the arc structure, and less than the diameter of the arc structure, and the outer side wall of the stirring rod 5 is provided with multiple spaced granular structures, so that the outer side wall of the stirring rod 5 is a rough surface. The frame 1 is provided with a driving assembly, which includes a first driving member 31, a driving shaft 32, a driven shaft 33, a first gear 34, a second gear 35, a first belt 36 and a second belt 37. The first driving member 31 is a motor, which is fixedly connected to the frame 1. One end of the driving shaft 32 is rotatably matched with the frame 1, and the other end thereof is rotatably matched with the mixing bin 2. The first driving member 31 is used to drive the driving shaft 32 to rotate. The driven shaft 33 is parallel to the driving shaft 32 and is spaced apart. Its end is rotatably matched with the mixing bin 2. The first gear 34 is fixedly connected to the driving shaft 32, and the second gear 35 is fixedly connected to the driven shaft 32. On the shaft 33, the first gear 34 is meshed with the second gear 35, the first belt 36 is frictionally matched with the driving shaft 32 and one of the rotating shafts 4 respectively, and the second belt 37 is frictionally matched with the driven shaft 33 and the other rotating shaft 4 respectively. When the first driving member 31 drives the driving shaft 32 to rotate, the rotation direction of the driven shaft 33 is opposite to that of the driving shaft 32 under the action of the first gear 34 and the second gear 35. The driving shaft 32 drives the corresponding rotating shaft 4 to rotate through the first belt 36, and the driven shaft 33 drives the other rotating shaft 4 to rotate in the opposite direction through the second belt 37. The rotation directions of the two rotating shafts 4 are opposite.

[0043] like Figure 2 , Figure 4 and Figure 5 As shown, an adjusting rod 6 is rotatably matched inside the rotating shaft 4, and the adjusting rod 6 is coaxially distributed with the rotating shaft 4. A second driving member 7 is provided on the frame 1, and the second driving member 7 is a hydraulic cylinder, and its output end is fixedly connected with the adjusting rod 6. A matching annular groove 8 is provided on the side wall of the adjusting rod 6, and a limiting ring 41 is provided on the inner wall of the rotating shaft 4, and the limiting ring 41 is matched with the matching annular groove 8. The second driving member 7 is used to drive the adjusting rod 6 to move along its axial direction, and the rotating shaft 4 and the adjusting rod 6 move synchronously under the clamping of the matching annular groove 8 and the limiting ring 41.

[0044] like Figures 4 to 6 As shown, the stirring rod 5 is a hollow structure, a rotating rod 9 is provided inside the stirring rod 5, a spiral blade 10 is provided on the rotating rod 9, the side wall of the spiral blade 10 is stopped and slidably matched with the inner wall of the stirring rod 5, the rotating rod 9 is rotatably connected with the stirring rod 5 through a torsion spring 13, and its inner end passes through the rotating shaft 4 and extends into the rotating shaft 4, a friction ring 11 is provided on the side wall of the adjusting rod 6, and the friction ring 11 has a notch, and a friction wheel 12 is fixedly connected to the inner end of the rotating rod 9, and the friction wheel 12 is frictionally matched with the friction ring 11. The outer end of the side wall of the stirring rod 5 has an opening. When the rotating shaft 4 rotates, the friction wheel 12 rotates along the friction ring 11, and the rotating rod 9 rotates under the action of friction force, thereby driving the spiral blade 10 to rotate in the stirring rod 5, and the torsion spring 13 stores force. The material in the mixing bin 2 can enter the stirring rod 5 through the opening and move to the inside of the stirring rod 5 under the push of the spiral blade 10. When the friction wheel 12 moves to the notch of the friction ring 11, the friction wheel 12 is disengaged from the friction ring 11, and the torsion spring 13 releases the elastic force, thereby pushing the rotating rod 9 to rotate in the opposite direction, and the spiral blade 10 rotates in the opposite direction to discharge the material in the stirring rod 5, thereby improving the material mixing efficiency.

[0045] The mold slag mixing method according to an embodiment of the present invention is applied to a mixing bin for preparing mold slag according to an embodiment of the present invention, and comprises the following steps:

[0046] In the first step, various raw materials, additives and water are poured into the mixing bin 2 from the feed port 14 .

[0047] The second step is stirring and forming. The first driving member 31 drives the driving shaft 32 to rotate. The driving shaft 32 drives the driven shaft 33 to rotate in the opposite direction through the first gear 34 and the second gear 35. The driving shaft 32 drives the left rotating shaft 4 to rotate clockwise through the first belt 36, and the driven shaft 33 drives the right rotating shaft 4 to rotate counterclockwise through the second belt 37. Each rotating shaft 4 drives the corresponding stirring rod 5 to rotate synchronously with it. When the stirring rod 5 rotates in the lower half of the mixing bin 2, its outer end stops against the inner wall of the corresponding arc surface structure, thereby stirring the material in the mixing bin 2. Two adjacent stirring rods 5 will pick up material lumps during the stirring process. Through the cross rotation of the stirring rods 5 rotating in opposite directions, the rough surface of the outer wall of the stirring rod 5 will squeeze the material lumps, thereby breaking the material lumps. During the rotation of the rotating shaft 4, the second driving member 7 drives the adjusting rod 6 to move back and forth along its axial direction, thereby increasing the stirring range of the stirring rod 5 and improving the stirring effect.

[0048] The third step is discharging. After the mixing is completed, the sealing plate is opened and the material in the mixing bin 2 can be discharged from the mixing bin 2 through the discharging port.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A mixing bin for preparing mold slag, comprising: A frame, to which a mixing bin is fixedly connected; A stirring assembly, the stirring assembly is located in the mixing bin, and a driving assembly is provided on the frame, and the driving assembly is used to drive the stirring assembly to operate; The invention is characterized in that the bottom of the mixing bin is formed by splicing two symmetrically distributed arc surface structures, the stirring assembly comprises a rotating shaft and a stirring rod, and an adjusting rod is rotatably matched in the rotating shaft. There are two rotating shafts, which are respectively located at the centers of the two arc surfaces. A plurality of stirring rods are spaced apart along the circumference of the rotating shaft to form a stirring rod group. The plurality of stirring rod groups are spaced apart along the axial direction of the rotating shaft. The stirring rod groups on the two rotating shafts are staggered. The ends of the stirring rods can stop against the arc surface structure. The spacing between the two rotating shafts is greater than the radius of the arc surface structure and less than the diameter of the arc surface structure. The stirring rod is a hollow rod, a rotating rod is arranged inside the stirring rod, a spiral blade is arranged on the rotating rod, the rotating rod is rotatably connected to the stirring rod through a torsion spring, the end of the rotating rod passes through the rotating shaft and extends into the rotating shaft, a friction ring is arranged on the side wall of the adjusting rod, the friction ring has a notch, a friction wheel is arranged at the end of the rotating rod, and the friction wheel is frictionally matched with the friction ring; An opening is provided at the outer end of the side wall of the stirring rod, and the direction of the opening is the same as the rotation direction of the stirring rod, so that materials can enter the stirring rod through the opening.

2. The mixing bin for preparing mold slag according to claim 1, characterized in that: The driving assembly includes a first driving member, a driving shaft, a driven shaft, a first gear, a second gear, a first belt and a second belt. The first driving member is arranged on the frame. The driving shaft and the driven shaft are both rotatably engaged on the frame. The first driving member is used to drive the driving shaft to rotate. The first gear is arranged on the driving shaft, and the second gear is arranged on the driven shaft. The first gear is meshed with the second gear. The first belt is frictionally engaged with the driving shaft and one of the rotating shafts respectively, and the second belt is frictionally engaged with the driven shaft and the other rotating shaft respectively.

3. The mixing bin for preparing protective slag according to claim 2, characterized in that: A matching ring groove is provided on the circumferential side of the adjusting rod, a limiting ring is provided in the rotating shaft, and the limiting ring is slidably fitted in the matching ring groove. A second driving member is provided on the frame, and the second driving member is used to drive the adjusting rod to move along its axial direction and drive the rotating shaft to move along its axial direction.

4. The mixing bin for preparing mold slag according to claim 3, characterized in that: The side wall of the stirring rod is provided with a plurality of granular structures distributed at intervals to form a rough surface. The gap between adjacent stirring rod groups is greater than the width of the stirring rod. The stirring rod can break up the agglomerated materials during the stirring process.

5. The mixing bin for preparing mold slag according to claim 4, characterized in that: The top of the mixing bin is provided with a feed inlet, and the bottom thereof is provided with a discharge outlet, and a sealing plate is also slidably matched at the discharge outlet.

6. A method for mixing mold slag, applied to the mixing bin for preparing mold slag according to claim 5, characterized in that: The following steps are involved: The first step is raw material preparation, pouring various raw materials, additives and water into the mixing bin; The second step is stirring and forming. The first driving member drives the two rotating shafts to rotate in opposite directions. The rotating shafts drive the stirring rods to rotate synchronously. The stirring rods stir the materials in the mixing bin. The third step is discharging. After sufficient stirring, open the sealing plate and the formed material is discharged from the mixing bin from the discharging port.

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