Quartz sand calcining furnace

Abstract

The utility model discloses a quartz sand calcining furnace belongs to quartz sand processing related technical field, including fixed base and heat shield, the heat shield fixed mounting is in the upper end outer surface of fixed base, the inside movable mounting of heat shield has rotary furnace, the inboard fixed mounting of rotary furnace has auger blade, the whole of auger blade is helical structure, and the outer surface fixed mounting of auger blade has several groups of three edge strips, the inner surface of rotary furnace is covered and has several groups of arc lining, and the one side outer surface of arc lining is arc structure, the lateral edge of auger blade is equipped with the arc recess of cooperation arc lining use, the both ends of heat shield and rotary furnace all are through pivot swing joint, to the optimization of rotary furnace internal structure, increase quartz sand in the retention time in rotary furnace, make quartz sand in short distance moving process can reach predetermined temperature, make quartz sand's heat more evenly, promote its calcining effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of quartz sand processing, specifically a quartz sand calcining furnace. Background Technology

[0002] A quartz sand calcination furnace is an industrial device used for high-temperature processing of quartz sand. By heating (typically to 1200-1600℃), it removes organic impurities, moisture, and volatile substances, while simultaneously promoting quartz crystal transformation to improve its chemical stability and purity, meeting the raw material requirements of high-precision industries such as photovoltaics, electronics, and optical glass. This equipment typically employs rotary kilns, tunnel kilns, or vertical furnaces, featuring temperature control, optimized energy consumption, and environmental protection systems, making it a crucial step in the deep processing of quartz sand.

[0003] Patent document CN109442983A describes a rotary kiln, which includes: a furnace body, a furnace chamber defined within the furnace body, a molten pool at the bottom of the furnace chamber, a feed inlet communicating with the furnace chamber on the side wall of the furnace body, the center line of the feed inlet coinciding with the rotation center line of the furnace body; and a feeding device, the discharge end of which can cooperate with the feed inlet.

[0004] Existing rotary kilns have certain shortcomings in the heating of quartz sand. While rotary kilns can continuously output quartz sand, the sand needs to be heated to 1200-1600℃ to remove organic impurities, moisture, and volatile substances. The only way to achieve this is to increase the residence time of the quartz sand by either increasing its length or reducing its rotation speed. However, increasing the length increases the volume of the rotary kiln, and decreasing the rotation speed reduces the output of quartz sand. Therefore, conventional rotary kiln structures cannot meet the requirements for quartz sand calcination, preventing continuous output of quartz sand.

[0005] In summary, increasing the length of the rotary kiln in the existing technology will increase the volume of the rotary kiln, and at the same time, reducing the rotation speed will reduce the output of quartz sand. Therefore, the conventional rotary kiln structure cannot meet the requirements for quartz sand calcination, resulting in the problem of continuous output of quartz sand. Utility Model Content

[0006] This invention provides a quartz sand calcining furnace, which solves the problem in the prior art where increasing the length of the rotary furnace increases its volume, and decreasing the rotation speed reduces the output of quartz sand. Therefore, conventional rotary furnace structures cannot meet the requirements for quartz sand calcination, resulting in a lack of continuous quartz sand output.

[0007] A quartz sand calcining furnace includes a fixed base and a heat insulation cover. The heat insulation cover is fixedly installed on the upper outer surface of the fixed base. A rotary furnace is movably installed inside the heat insulation cover. Screwdriver blades are fixedly installed on the inner side of the rotary furnace. The screwdriver blades have an overall spiral structure, and several sets of triangular strips are fixedly installed on the outer surface of the screwdriver blades. Several sets of arc-shaped liners cover the inner surface of the rotary furnace, and one side of the outer surface of the arc-shaped liner has an arc structure. The side of the screwdriver blades is provided with arc-shaped grooves that cooperate with the arc-shaped liner.

[0008] As a further technical solution of this utility model, both ends of the heat insulation cover and the rotary kiln are movably connected by a rotating shaft. One end of the rotary kiln is provided with a feeding chute. The rotary kiln is heated by electric heating. The user pours the quartz sand into the interior of the rotary kiln. During the rotation of the rotary kiln, the auger blades transport the quartz sand from the feeding end to the discharging end of the rotary kiln. The quartz sand is heated and calcined during the movement of the quartz sand.

[0009] As a further technical solution of this utility model, both sides of the triangular strip are inclined, and the triangular strip and the auger blade are welded and fixed together. By using the triangular strip, the quartz sand on one side of the auger blade can be turbulent during the rotation of the auger blade, so that the quartz sand is evenly dispersed during the movement, and the heating of the quartz sand is more uniform.

[0010] As a further technical solution of this utility model, an electric motor is fixedly installed inside the fixed base. The electric motor and the rotary kiln are driven by a transmission chain and gears. During operation, the electric motor drives the rotary kiln through the transmission chain and gears. When the rotary kiln rotates, the arc-shaped liner causes the quartz sand to tumble and move in a wave-like manner inside the rotary kiln. Compared with the traditional columnar rotary kiln, the addition of the arc-shaped liner prolongs the residence time of the quartz sand in the rotary kiln.

[0011] As a further technical solution of this utility model, the upper end of the fixed base is provided with a feeding hopper for use with the rotary kiln, and a heat insulation groove is provided between the rotary kiln and the heat insulation cover. The heat insulation cover can reduce the heat consumption of the rotary kiln and play a heat insulation role for the rotary kiln.

[0012] As a further technical solution of this utility model, the outer surface of the rotary kiln is covered with several sets of electric heaters, which are arranged in a ring. The electric heaters can be used to heat the rotary kiln. The rotary kiln completes the continuous heating and discharge of quartz sand by rotating and conveying materials.

[0013] As a further technical solution of this utility model, the surface of the rotary kiln is embedded with several sets of screens, and the rotary kiln and the screens are fixed by a slot. By using the screens, the surface of the rotary kiln has a rotating screening structure, and the screening of the quartz sand is completed during the forward movement of the quartz sand.

[0014] As a further technical solution of this utility model, a material collection hopper is fixedly installed at the lower middle position of the heat insulation cover. The inner side of the material collection hopper is inclined, and the material collection hopper makes the lower end of the heat insulation cover have a material collection structure.

[0015] As a further technical solution of this utility model, a receiving trough is provided at one end of the fixed base, and a discharge hopper for use with the receiving trough is fixedly installed on the outer side surface of the fixed base. By using the receiving trough and the discharge hopper, the quartz sand heated by the rotary kiln can be collected and discharged.

[0016] As a further technical solution of this utility model, the fixed base and the heat insulation cover are fixed together by a fixed bracket, and the outer surface of the fixed base is provided with a screening hopper.

[0017] The beneficial effects of this utility model are as follows: By using triangular ribs and arc-shaped liners, this utility model optimizes the internal structure of the rotary kiln when used in the quartz sand calcination furnace, increasing the residence time of the quartz sand within the furnace. This allows the quartz sand to reach the predetermined temperature during short-distance movement, resulting in more uniform heating and improved calcination effect. The rotary kiln uses electric heating. The user pours the quartz sand into the furnace, and during rotation, the auger blades transport the quartz sand from the feed end to the discharge end, completing the heating process during its movement. During calcination, the arc-shaped liner causes the quartz sand to tumble and move in a wave-like pattern within the rotary furnace as it rotates. Compared to traditional columnar rotary furnaces, the addition of the arc-shaped liner prolongs the residence time of the quartz sand within the furnace. The triangular ribs allow for turbulence on one side of the auger blades during rotation, ensuring even dispersion of the quartz sand during movement and resulting in more uniform heating and improved heating efficiency. A heat insulation groove is provided between the rotary furnace and the heat insulation cover. The heat insulation cover reduces heat consumption and provides insulation for the rotary furnace.

[0018] By setting up a screen and a collection hopper, the use of the rotary kiln in this quartz sand calcination furnace is optimized, giving it an auxiliary screening structure. The quartz sand screening operation can be completed simultaneously during the rotation of the rotary kiln, improving its efficiency. During operation, the screen creates a rotating screening structure on the surface of the rotary kiln. As the quartz sand moves forward, it comes into contact with the screen, completing the screening process, removing powdery substances from the quartz sand, and reducing dust generation. The collection hopper provides a collection structure at the lower end of the heat insulation cover, collecting the powdery substances discharged from the screen. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a diagram of the internal structure of the rotary kiln in this utility model;

[0022] Figure 3 This is a partial structural diagram of the auger blades and rotary kiln in this utility model.

[0023] In the diagram: 1. Screwdriver blades; 2. Rotary furnace; 3. Heat shield; 4. Drive chain; 5. Feed hopper; 6. Fixed base; 7. Discharge hopper; 8. Motor; 9. Heater; 10. Shaft; 11. Collection hopper; 12. Triangular rib; 13. Arc-shaped liner; 14. Arc-shaped groove; 15. Screen; 16. Screen hopper; 17. Fixed bracket. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1-3 As shown, a quartz sand calcining furnace includes a fixed base 6 and a heat insulation cover 3. The heat insulation cover 3 is fixedly installed on the upper outer surface of the fixed base 6. A rotary furnace 2 is movably installed inside the heat insulation cover 3. A screw conveyor blade 1 is fixedly installed on the inner side of the rotary furnace 2. The screw conveyor blade 1 has an overall spiral structure, and several sets of triangular strips 12 are fixedly installed on the outer surface of the screw conveyor blade 1. Several sets of arc-shaped liners 13 cover the inner surface of the rotary furnace 2, and one side of the outer surface of the arc-shaped liner 13 has an arc structure. The side of the screw conveyor blade 1 is provided with an arc-shaped groove 14 that is used in conjunction with the arc-shaped liner 13.

[0026] Both ends of the heat insulation cover 3 and the rotary furnace 2 are movably connected by the rotating shaft 10. One end of the rotary furnace 2 is equipped with a feeding chute. The rotary furnace 2 is heated by electric heating. The user pours the quartz sand into the interior of the rotary furnace 2. During the rotation of the rotary furnace 2, the auger blades 1 are used to transport the quartz sand from the feeding end of the rotary furnace 2 to the discharge end of the rotary furnace 2. The quartz sand is heated and calcined during the movement.

[0027] Both sides of the triangular strip 12 are inclined. The triangular strip 12 and the auger blade 1 are welded and fixed together. By using the triangular strip 12, the quartz sand on one side of the auger blade 1 can be turbulent during the rotation of the auger blade 1, so that the quartz sand is evenly dispersed during the movement, and the heating of the quartz sand is more uniform.

[0028] An electric motor 8 is fixedly installed inside the fixed base 6. The electric motor 8 and the rotary kiln 2 are driven by a transmission chain 4 and gears. During operation, the electric motor 8 drives the rotary kiln 2 through the transmission chain 4 and gears. When the rotary kiln 2 rotates, the arc-shaped liner 13 causes the quartz sand to tumble and move in a wave-like manner inside the rotary kiln 2. Compared with the traditional columnar structure of the rotary kiln 2, the addition of the arc-shaped liner 13 prolongs the residence time of the quartz sand in the rotary kiln 2.

[0029] A heat insulation groove is provided between the rotary kiln 2 and the heat insulation cover 3. The heat insulation cover 3 can reduce the heat consumption of the rotary kiln 2 and play a heat insulation role for the rotary kiln 2.

[0030] The outer surface of the rotary kiln 2 is covered with several sets of electric heaters 9, which are arranged in a ring. The electric heaters 9 can be used to heat the rotary kiln 2. The rotary kiln 2 completes the continuous heating and discharge of quartz sand by rotating and conveying materials.

[0031] Several sets of screens 15 are embedded on the surface of the rotary kiln 2. The rotary kiln 2 and the screens 15 are fixed together by a slot. By using the screens 15, the surface of the rotary kiln 2 has a rotating screening structure, which completes the screening of the quartz sand during the forward movement of the quartz sand.

[0032] A material collection hopper 11 is fixedly installed at the lower middle position of the heat insulation cover 3. The inner side of the material collection hopper 11 is inclined, and the setting of the material collection hopper 11 makes the lower end of the heat insulation cover 3 have a material collection structure.

[0033] One end of the fixed base 6 is provided with a receiving trough, and a discharge hopper 7 for use with the receiving trough is fixedly installed on the outer side of the fixed base 6. By using the receiving trough and the discharge hopper 7, the quartz sand heated by the rotary kiln 2 can be collected and discharged.

[0034] The fixed base 6 and the heat insulation cover 3 are fixed together by a fixed bracket 17, and the outer surface of the fixed base 6 is provided with a screening hopper 16.

[0035] A quartz sand calcining furnace, in use, optimizes the internal structure of the rotary furnace 2 through triangular ribs 12 and arc-shaped liners 13, increasing the residence time of the quartz sand within the rotary furnace 2. This allows the quartz sand to reach the predetermined temperature during short-distance movement, resulting in more uniform heating and improved calcination effect. The rotary furnace is electrically heated. The user pours the quartz sand into the rotary furnace 2, and during its rotation, the auger blades 1 transport the quartz sand from the feed end to the discharge end of the rotary furnace 2. The calcination process is completed during the movement of the quartz sand. When the converter 2 rotates, the arc-shaped liner 13 causes the quartz sand to tumble and move in a wave-like manner inside the converter 2. Compared with the traditional columnar structure of the converter 2, the addition of the arc-shaped liner 13 prolongs the residence time of the quartz sand in the converter 2. By using the triangular strip 12, the quartz sand on one side of the auger blade 1 can be turbulent during the rotation of the auger blade 1, so that the quartz sand is evenly dispersed during the movement, making the heating of the quartz sand more uniform and improving the heating effect of the quartz sand. A heat insulation groove is provided between the converter 2 and the heat insulation cover 3. The heat insulation cover 3 can reduce the heat consumption of the converter 2 and play a heat insulation role for the converter 2.

[0036] By setting up the screen 15 and the collecting hopper 11, the use of the rotary kiln 2 is optimized when the quartz sand calcining furnace is used, giving it an auxiliary screening structure. The quartz sand screening operation can be completed simultaneously during the rotation of the rotary kiln 2, improving its performance. During operation, the screen 15 makes the surface of the rotary kiln 2 have a rotating screening structure. During the forward movement of the quartz sand, the quartz sand comes into contact with the screen 15, completing the screening process, removing powdery substances from the quartz sand, and reducing dust. The collecting hopper 11 makes the lower end of the heat insulation cover 3 have a collecting structure, collecting the powdery substances discharged from the screen 15 through the collecting hopper 11.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A quartz sand calcining furnace, characterized in that, The device includes a fixed base (6) and a heat insulation cover (3). The heat insulation cover (3) is fixedly installed on the upper outer surface of the fixed base (6). A rotary kiln (2) is movably installed inside the heat insulation cover (3). A screw conveyor blade (1) is fixedly installed on the inner side of the rotary kiln (2). The screw conveyor blade (1) has a spiral structure. Several sets of triangular strips (12) are fixedly installed on the outer surface of the screw conveyor blade (1). Several sets of arc-shaped liners (13) cover the inner surface of the rotary kiln (2). One side of the outer surface of the arc-shaped liners (13) has an arc structure. The side of the screw conveyor blade (1) is provided with an arc-shaped groove (14) for use with the arc-shaped liners (13).

2. The quartz sand calcining furnace according to claim 1, characterized in that, The heat insulation cover (3) and the rotary kiln (2) are movably connected at both ends by a rotating shaft (10), and a feed chute is provided at one end of the rotary kiln (2).

3. The quartz sand calcining furnace according to claim 1, characterized in that, Both sides of the triangular strip (12) are inclined, and the triangular strip (12) and the auger blade (1) are welded and fixed together.

4. A quartz sand calcining furnace according to claim 1, characterized in that, An electric motor (8) is fixedly installed inside the fixed base (6), and the electric motor (8) and the rotary kiln (2) are driven by gears through a transmission chain (4).

5. A quartz sand calcining furnace according to claim 1, characterized in that, The upper end of the fixed base (6) is provided with a feed hopper (5) for use with the rotary kiln (2), and a heat insulation groove is provided between the rotary kiln (2) and the heat insulation cover (3).

6. A quartz sand calcining furnace according to claim 1, characterized in that, The outer surface of the rotary kiln (2) is covered with several sets of electric heaters (9), which are arranged in a ring.

7. A quartz sand calcining furnace according to claim 6, characterized in that, The rotary kiln (2) has several sets of screens (15) embedded in its surface, and the rotary kiln (2) and the screens (15) are fixed together by a slot.

8. A quartz sand calcining furnace according to claim 1, characterized in that, A material collection hopper (11) is fixedly installed at the lower middle position of the heat insulation cover (3), and the inner side of the material collection hopper (11) is inclined.

9. A quartz sand calcining furnace according to claim 1, characterized in that, One end of the fixed base (6) is provided with a receiving trough, and a discharge hopper (7) for use with the receiving trough is fixedly installed on the outer side surface of the fixed base (6).

10. A quartz sand calcining furnace according to claim 1, characterized in that, The fixed base (6) and the heat insulation cover (3) are fixed together by a fixed bracket (17), and the outer surface of the fixed base (6) is provided with a screening hopper (16).

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