A belt vacuum filter for non-metallic mineral processing

Abstract

The application discloses a belt type vacuum filter for non-metallic mineral processing, which comprises a rubber belt, a sealing and lubricating belt is arranged in the rubber belt, a negative pressure maintaining device is arranged above the rubber belt, a high-temperature atomization and blowing device is arranged in the negative pressure maintaining device, a filter cloth belt is arranged outside the rubber belt, and a sealing cover is arranged outside the filter cloth belt.

Description

Technical Field

[0001] This invention belongs to the field of vacuum filter technology, specifically relating to a belt vacuum filter for non-metallic mineral processing. Background Technology

[0002] Currently, various energy sources are being developed, including geothermal, wind, and hydropower. Among these, photovoltaic solar energy is one of the most promising new energy sources for future development. This has led to a surge in demand for non-metallic minerals such as photovoltaic glass sand and feldspar. Demand for silicon-based raw materials for photovoltaic glass (such as quartz and feldspar) is also increasing, creating a stark contrast with the gradual depletion of high-quality non-metallic mineral resources. Conventional physical beneficiation and flotation processes are insufficient to bring non-metallic minerals up to product raw material quality requirements. A new process is needed to remove iron- and aluminum-rich impurities from particle surfaces. Furthermore, to improve production efficiency, dynamic acid washing technology has been developed. This technology requires rapid online solid-liquid separation, demanding high-performance equipment.

[0003] The existing dynamic acid washing process is a novel mineral processing technology. The commercially available mature belt vacuum process equipment can only achieve rapid solid-liquid separation. However, the requirements of the process, such as filter cake cleaning, pressure holding of large polar mineral particles, and orderly control of acid mist, cannot be met. In particular, the use of conventional tap water for the sealing belt causes a series of secondary problems due to the mismatch of water volume in the system. Therefore, we propose a belt vacuum filter for non-metallic mineral processing. Summary of the Invention

[0004] The purpose of this invention is to provide a belt vacuum filter for processing non-metallic minerals, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a belt vacuum filter for non-metallic mineral processing, comprising a rubber belt, a sealing lubrication belt inside the rubber belt, a negative pressure maintaining device above the rubber belt, a high-temperature atomizing rinsing device inside the negative pressure maintaining device, a filter cloth belt sleeved on the outside of the rubber belt, a sealing cover on the outside of the filter cloth belt, a primary gas-liquid separator for acid recovery, a secondary gas-liquid separator and a tertiary gas-liquid separator for cleaning below the sealing cover, and a filter cloth rinsing device located inside the filter cloth belt at the bottom of the sealing cover.

[0006] Preferably, the rubber belt has a vent hole along its center line, and two sealing and lubricating strips are provided on both sides of the vent hole.

[0007] Preferably, the acid return vacuum chamber A and the acid return vacuum chamber B are connected to the primary gas-liquid separator and the secondary gas-liquid separator, respectively, and the cleaning vacuum chamber C is connected to the tertiary gas-liquid separator.

[0008] Preferably, the negative pressure maintaining device includes a sealed filter cloth located above the rubber belt.

[0009] Preferably, the outlet of the three-stage gas-liquid separator is equipped with a waste acid treatment system, and the outlets of the first-stage, second-stage, and third-stage gas-liquid separators are connected to the inlet of a vacuum pump.

[0010] Preferably, the top of the sealing cover is provided with an acid mist collection device, which includes a smoke collection port on the top of the sealing cover.

[0011] Preferably, the sealing cover is provided with a slurry feeder extending to the top of the filter cloth belt, and the inner wall of the sealing cover is provided with a slurry feeding mechanism. The slurry feeding mechanism includes a feeding rod horizontally located above the filter cloth belt. The left end of the feeding rod is provided with a rotating component that drives it to rotate back and forth. A drive cylinder that is movably connected to the rotating component is provided on the rear side of the rotating component.

[0012] The rotating component includes a reciprocating rack installed at the front end of the drive cylinder, and a forward and reverse wheel is engaged on the right side of the reciprocating rack. The left end of the actuating lever is fixed on the forward and reverse wheel.

[0013] Preferably, a vertical rod is provided on the upper inner surface of the sealing cover, penetrating the forward and reverse rotation wheel, and a sleeve is fitted on the rod, the sleeve being rotatably connected to the forward and reverse rotation wheel.

[0014] Preferably, the actuating lever includes a fixed inner rod fixed to the right side of the forward and reverse rotation wheel, an adjusting cylinder is provided on the upper surface of the fixed inner rod, an outer tube is sleeved on the outer end of the fixed inner rod, and the upper surface of the outer tube is connected to the piston rod inside the adjusting cylinder.

[0015] Preferably, the rear end of the drive cylinder is provided with a lifting component, the lifting component includes a vertical rail provided on the inner surface of the rear end of the sealing cover, a sliding sleeve is slidably sleeved on the vertical rail, the rear end of the drive cylinder is fixed on the sliding sleeve, a connecting plate is provided between the sliding sleeve and the sleeve, and a lifting cylinder located on the right side of the vertical rail is provided on the inner wall of the rear end of the sealing cover, the lower end of the piston rod inside the lifting cylinder is fixed on the upper surface of the connecting plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) This invention enables continuous feeding and achieves rapid solid-liquid separation by relying on gravity and vacuum negative pressure. The equipment is made of acid-resistant materials and has an optimized structural design, making it able to withstand harsh working conditions.

[0018] With a high degree of automation, simple structure, and easy use, the optimized lower lubrication belt roller and ingenious vacuum chamber design, along with the subsequent addition of high-pressure, high-temperature atomizing nozzles to clean the filter cake, can effectively control the system water volume and maintain it without increasing. At the same time, the surface sealing allows non-metallic quartz sand and other polar hydrophilic minerals to maintain a high pressure, enabling further recovery of acid.

[0019] (2) By combining the slurry agitation mechanism and the filter cloth belt, the present invention can agitate and spread the slurry falling on the filter cloth belt, so that the slurry is evenly spread and the contact area with the filter cloth belt is increased. This will prevent the slurry material from accumulating too much and causing the middle position to be unable to be fully separated, thereby improving the slurry separation effect and separation efficiency of the filter cloth belt.

[0020] (3) The present invention has a lifting component, which can change the height of the lever, thereby adjusting the thickness of the slurry laid on the filter cloth belt, increasing the convenience of solid-liquid separation of the slurry material, and has a cleaning component, which can increase the frictional resistance with the rubber belt, prevent the slurry material from condensing and remaining on the rubber belt, and facilitate the slurry material to be discharged with the movement of the rubber belt. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the vacuum filter of the present invention;

[0022] Figure 2 For the present invention Figure 1 A three-dimensional structural diagram of the slurry actuation mechanism;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the slurry actuation mechanism;

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the rotating component in the middle;

[0025] Figure 5 For the present invention Figure 3 Schematic diagram of the lifting component;

[0026] Figure 6 For the present invention Figure 2 Schematic diagram of the friction component;

[0027] In the diagram: 1. Sealing cover; 2. Acid mist collection device; 3. High-temperature atomizing purging device; 4. Negative pressure maintaining device; 5. Smoke collection port; 6. Slurry distributor; 7. Slurry actuating mechanism; 71. Actuating rod; 711. Fixed inner rod; 712. Outer pipe; 713. Adjusting cylinder; 72. Rotating component; 721. Vertical rod; 722. Forward and reverse rotation wheel; 723. Reciprocating rack; 724. Fixed protrusion; 725. Sleeve; 73. Drive cylinder; 74. Lifting component; 7 41. Lifting cylinder; 742. Vertical rail; 743. Sliding sleeve; 744. Limit bolt; 745. Connecting plate; 8. Filter cloth belt; 9. Rubber belt; 10. Control cabinet; 11. Primary gas-liquid separator; 12. Secondary gas-liquid separator; 13. Tertiary gas-liquid separator; 14. Waste acid treatment system; 15. Filter cloth washing device; 16. Friction component; 161. Fixing rod; 162. Mounting roller; 163. Cleaning strip; 164. Guide ring; 165. Support plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figure 1 This invention provides a technical solution: a belt vacuum filter for non-metallic mineral processing, comprising a rubber belt 9, a sealing lubrication belt inside the rubber belt 9, a negative pressure maintaining device 4 above the rubber belt 9, a high-temperature atomizing rinsing device 3 inside the negative pressure maintaining device 4, using a high-temperature resistant (80-110℃), corrosion-resistant (HF, hydrochloric acid, etc.) ceramic nozzle or a copper atomizing nozzle, a filter cloth belt 8 sleeved on the outside of the rubber belt 9, a sealing cover 1 on the outside of the filter cloth belt 8, the sealing cover 1 achieving overall sealing of the equipment's feed end, sides and top, a primary gas-liquid separator 11 for acid recovery, a secondary gas-liquid separator 12 and a tertiary gas-liquid separator 13 for cleaning are arranged below the sealing cover 1, and a filter cloth rinsing device 15 located inside the filter cloth belt 8 is arranged at the bottom of the sealing cover 1.

[0031] In this embodiment, preferably, the rubber belt 9 has a vent hole at its center line, and two sealing lubrication strips are provided on both sides of the vent hole. The sealing water of the sealing lubrication strips is hot acid liquid. Below it is a heat-resistant acid liquid HDPE corrosion-resistant and wear-resistant track. The heat-resistant acid liquid track is provided with a sealing lubrication strip and has an acid return vacuum chamber A, an acid return vacuum chamber B and a cleaning vacuum chamber C. The vacuum chamber material is also selected from HDPE corrosion-resistant material.

[0032] In this embodiment, preferably, the acid return vacuum chamber A and the acid return vacuum chamber B are connected to the primary gas-liquid separator 11 and the secondary gas-liquid separator 12, respectively, and the cleaning vacuum chamber C is connected to the tertiary gas-liquid separator 13.

[0033] In this embodiment, preferably, the negative pressure maintaining device 4 includes a sealing filter cloth located above the rubber belt 9. The pore size of the sealing filter cloth is smaller than that of the filter cloth belt 8. The pore size of the filter cloth belt 8 is 40 μm, and the pore size of the sealing filter cloth is 20 μm. The sealing filter cloth in the negative pressure maintaining device 4 rotates synchronously with the rubber belt 9 and the filter cloth belt 8.

[0034] In this embodiment, preferably, the outlets of the primary gas-liquid separator 11 and the secondary gas-liquid separator 12 are connected to a circulation system, and the outlet of the tertiary gas-liquid separator 13 is equipped with a waste acid treatment system 14. The waste acid treatment system 14 adopts existing waste acid treatment technology. The outlets of the primary gas-liquid separator 11, the secondary gas-liquid separator 12 and the tertiary gas-liquid separator 13 are connected to the inlet of a vacuum pump, and the gas-liquid separator is used to quickly separate the material into gas and liquid.

[0035] In this embodiment, preferably, an acid mist collection device 2 is provided on the top of the sealing cover 1. The acid mist collection device 2 includes a smoke collection port 5 provided on the top of the sealing cover 1. The acid mist collection device 2 also includes several collection covers evenly distributed below the smoke collection port 5, which expands the smoke collection area when separating non-metallic minerals, avoids the situation of smoke overflow, and also provides good conditions for occupational health and hygiene and centralized purification in the factory.

[0036] In this embodiment, preferably, a circulation pump is provided on the left side of the primary gas-liquid separator 11, and a control cabinet 10 is provided on the left side of the circulation pump.

[0037] In summary, during the solid-liquid separation process of non-metallic minerals, the slurry is evenly distributed onto the filter cloth belt 8 located on the rubber belt 9 by the slurry distributor 6. The slurry passes through the vacuum chamber A and vacuum chamber B sequentially with the filter cloth belt 8. Under the maintenance of the negative pressure maintaining device 4, solid-liquid separation is achieved. The separated liquid is centrally recovered and reused by the primary gas-liquid separator 11 and the secondary gas-liquid separator 12. The material ( / filter cake) continues to move forward with the filter cloth belt 8 to the working area of ​​the high-temperature atomizing blowing and washing device 3 for cleaning. The cleaning liquid enters the tertiary gas-liquid separator 13 through the vacuum chamber C under the maintenance of the negative pressure maintaining device 4, and is sent to the waste acid treatment system 14 for treatment. The clear liquid is pumped to the filter cloth washing device 15 for backwashing. During operation, the flue gas is all inside the sealed cover 1. As the airflow rises, it is absorbed by the acid mist collection device 2 placed at the top and sent to the acid mist treatment system for centralized treatment.

[0038] Example 2

[0039] Reference Figures 2-4 This is the second embodiment of the present invention, which differs from the previous embodiment in that...

[0040] In this embodiment, preferably, the sealing cover 1 is provided with a slurry distributor 6 extending to the top of the filter cloth belt 8. The material can be discharged through the slurry distributor 6 and fall onto the filter cloth belt 8. The inner wall of the sealing cover 1 is provided with a slurry agitation mechanism 7 for distributing the slurry. The slurry agitation mechanism 7 can be used to agitate and spread the slurry falling on the filter cloth belt 8, so that the slurry is evenly distributed and the contact area with the filter cloth belt 8 is increased. This prevents the slurry material from accumulating too much and causing the middle position to not be fully separated, thereby improving the separation effect and efficiency of the filter cloth belt 8 on the slurry. The slurry agitation mechanism 7 includes an agitation rod 71 horizontally located above the filter cloth belt 8. The agitation rod 71 can rotate back and forth. The left end of the agitation rod 71 is provided with a rotating component 72 that drives it to rotate back and forth. The rear side of the rotating component 72 is provided with a drive cylinder 73 that is movably connected to the rotating component 72. The operation of the drive cylinder 73 can drive the agitation rod 71 to rotate back and forth.

[0041] The rotating component 72 includes a reciprocating rack 723 mounted on the front end of the drive cylinder 73. A fixed protrusion 724 is vertically arranged on the left side of the reciprocating rack 723. The piston rod inside the drive cylinder 73 passes through the fixed protrusion 724 and protrudes to the outside. A limit rod is provided between the two to enable a detachable connection between them. At the same time, the position of the fixed protrusion 724 in the Y-axis direction is adjustable, thereby adjusting the reciprocating rack 723 as the piston rod extends out of the engagement range. The reciprocating rack 723 can move back and forth as the piston rod inside the drive cylinder 73 extends out. A forward and reverse rotation wheel 722 is engaged on the right side of the reciprocating rack 723. The left end of the actuating rod 71 is fixed on the forward and reverse rotation wheel 722, so that the actuating rod 71 can rotate back and forth as the forward and reverse rotation wheel 722 rotates.

[0042] In this embodiment, preferably, a vertical rod 721 is provided on the inner surface of the upper end of the sealing cover 1, which passes through the forward and reverse rotation wheel 722. The rod 721 can guide and suspend the forward and reverse rotation wheel 722. A sleeve 725 is sleeved on the rod 721. The sleeve 725 can move upward along the rod 721. The sleeve 725 is rotatably connected to the forward and reverse rotation wheel 722.

[0043] In this embodiment, preferably, the actuating rod 71 includes a fixed inner rod 711 fixed to the right side of the forward and reverse rotating wheel 722. An adjusting cylinder 713 is provided on the upper surface of the fixed inner rod 711. An outer tube 712 is sleeved on the outer end of the fixed inner rod 711. The upper surface of the outer tube 712 is connected to the piston rod inside the adjusting cylinder 713. The outer tube 712 can be driven by the piston rod to move along the fixed inner rod 711, thereby changing the length of the entire actuating rod 71 and increasing the laying range of the slurry material.

[0044] In summary, during operation, the drive cylinder 73 operates, extending its internal piston rod and driving the reciprocating rack 723 forward. Meanwhile, the rotating wheel 722, meshing with it, rotates counterclockwise, causing the fixed actuating rod 71 to rotate backward. This pushes the material accumulated on the filter cloth belt 8 from the lower end of the slurry distributor 6 backward. When the piston rod retracts, it drives the reciprocating rack 723 backward, while the rotating wheel 722 rotates clockwise, driving the actuating rod 71 forward. This process repeats, causing the actuating rod 71 to move back and forth, spreading the accumulated material and laying it relatively evenly on the filter cloth belt 8. This increases the contact area between the slurry and the filter cloth belt 8, and the relatively even and thin material can be filtered and separated from the filter cloth belt 8, increasing the solid-liquid separation effect of the slurry material.

[0045] Example 3

[0046] Reference Figure 4 and Figure 5 This is the third embodiment of the present invention, which differs from the previous two embodiments in that...

[0047] In this embodiment, preferably, a lifting component 74 is provided at the rear end of the drive cylinder 73. The lifting component 74 can be used to adjust the height of the actuating rod 71 according to the required thickness of the slurry. During subsequent material feeding, the slurry is fed to a suitable thickness. The lifting component 74 includes a vertical rail 742 provided on the inner surface of the rear end of the sealing cover 1. A sliding sleeve 743 is slidably sleeved on the vertical rail 742, and a limit bolt 744 is provided between the two to facilitate subsequent height positioning and fixation of the sliding sleeve 743. The rear end of the drive cylinder 73 is fixed on the sliding sleeve 742. On the sleeve 743, as the sliding sleeve 743 moves upward, the height of the adjustable drive cylinder 73 can be changed. A connecting plate 745 is provided between the sliding sleeve 743 and the sleeve 725. A lifting cylinder 741 located on the right side of the vertical rail 742 is provided on the inner wall of the rear end of the sealing cover 1. The height of the connecting plate 745 can be adjusted by using the lifting cylinder 741, thereby simultaneously changing the height of the sliding sleeve 743 and the sleeve 725, which facilitates the adjustment of the height position of the lever 71. The lower end of the piston rod inside the lifting cylinder 741 is fixed to the upper surface of the connecting plate 745.

[0048] In this embodiment, preferably, a friction member 16 is provided above the rubber belt 9. The friction member 16 can simultaneously move the cleaning strip 163 back and forth to clean the upper surface of the rubber belt 9 while the material is being pushed. The continuously moving cleaning strip 163 increases the frictional resistance with the rubber belt 9, improving the cleaning effect and reducing the amount of material condensing and remaining on the surface of the rubber belt 9. The friction member 16 includes an L-shaped fixing rod 161 at the front end of the reciprocating rack 723, which facilitates the movement of the rack 723 along with the material. 3. The movement drives the installation roller 162 and the cleaning strip 163 to move. The installation roller 162 is located above the rubber belt 9 and below the reciprocating rack 723. The cleaning strip 163 extending to the upper surface of the rubber belt 9 is provided on the lower surface of the installation roller 162. The lower end of the fixing rod 161 is fixed to the front end of the installation roller 162. The rear end of the installation roller 162 is fitted with a guide ring 164. The guide ring 164 can support and guide the installation roller 162. Support plates 165 are provided between the two sides of the guide ring 164 and the inner wall of the sealing cover 1.

[0049] In summary, when the height of the actuating lever 71 needs to be changed during use, the lifting cylinder 741 operates, the internal piston rod extends, driving the connecting plate 745 to move downwards. Meanwhile, the sliding sleeve 743 and sleeve 725, which are fixed to both ends of the connecting plate 745, move downwards along the vertical rail 742 and the upright 721 respectively, driving the drive cylinder 73, the forward and reverse wheel 722, and the actuating lever 71 to move downwards. When the height of the actuating lever 71 is appropriate, the lifting cylinder 741 stops working. While the actuating lever 71 is feeding material, the reciprocating rack 723 moves back and forth, driving the fixed rod 161 to move back and forth, thereby driving the mounting roller 162 to move back and forth in the guide ring 164, driving the cleaning strip 163 to move back and forth, and the lower end rubs against the upper surface of the rubber belt 9 to prevent the slurry from solidifying and remaining on the rubber belt 9, facilitating the subsequent discharge of slurry materials as they move with the rubber belt 9.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A belt vacuum filter for processing non-metallic minerals, comprising a rubber belt (9), characterized in that: The rubber belt (9) is provided with a sealing lubrication belt inside. A negative pressure maintaining device (4) is provided above the rubber belt (9). A high-temperature atomizing blowing and washing device (3) is provided inside the negative pressure maintaining device (4). A filter cloth belt (8) is sleeved on the outside of the rubber belt (9). A sealing cover (1) is provided on the outside of the filter cloth belt (8). A primary gas-liquid separator (11), a secondary gas-liquid separator (12), and a tertiary gas-liquid separator (13) for cleaning are provided below the sealing cover (1). A filter cloth rinsing device (15) located inside the filter cloth belt (8) is provided at the bottom of the sealing cover (1). The sealing cover (1) is provided with a slurry feeder (6) extending to the top of the filter cloth belt (8) at its lower end. The inner wall of the sealing cover (1) is provided with a slurry feeding mechanism (7). The slurry feeding mechanism (7) includes a feeding rod (71) horizontally located above the filter cloth belt (8). The left end of the feeding rod (71) is provided with a rotating component (72) that drives it to rotate back and forth. The rear side of the rotating component (72) is provided with a drive cylinder (73) that is movably connected to the rotating component (72). The rotating component (72) includes a reciprocating rack (723) installed at the front end of the drive cylinder (73), and a forward and reverse wheel (722) is meshed on the right side of the reciprocating rack (723). The left end of the actuating rod (71) is fixed on the forward and reverse wheel (722). The upper inner surface of the sealing cover (1) is vertically provided with a rod (721) that passes through the forward and reverse rotation wheel (722). A sleeve (725) is sleeved on the rod (721), and the sleeve (725) is rotatably connected to the forward and reverse rotation wheel (722). The actuating lever (71) includes a fixed inner rod (711) fixed to the right side of the forward and reverse rotation wheel (722). An adjusting cylinder (713) is provided on the upper surface of the fixed inner rod (711). An outer tube (712) is sleeved on the outer end of the fixed inner rod (711). The upper surface of the outer tube (712) is connected to the piston rod inside the adjusting cylinder (713).

2. The belt vacuum filter for non-metallic mineral processing according to claim 1, characterized in that: The rubber belt (9) has a vent hole along its center line, and two sealing and lubricating strips are provided on both sides of the vent hole.

3. A belt vacuum filter for non-metallic mineral processing according to claim 2, characterized in that: The acid return vacuum chamber A and the acid return vacuum chamber B are connected to the first-stage gas-liquid separator (11) and the second-stage gas-liquid separator (12) respectively, and the cleaning vacuum chamber C is connected to the third-stage gas-liquid separator (13).

4. A belt vacuum filter for non-metallic mineral processing according to claim 1, characterized in that: The negative pressure maintaining device (4) includes a sealed filter cloth located above the rubber belt (9).

5. A belt vacuum filter for non-metallic mineral processing according to claim 1, characterized in that: The outlet of the three-stage gas-liquid separator (13) is equipped with a waste acid treatment system (14), and the outlets of the first-stage gas-liquid separator (11), the second-stage gas-liquid separator (12) and the third-stage gas-liquid separator (13) are connected to the inlet of the vacuum pump.

6. A belt vacuum filter for non-metallic mineral processing according to claim 1, characterized in that: The top of the sealing cover (1) is provided with an acid mist collection device (2), which includes a smoke collection port (5) provided on the top of the sealing cover (1).

7. A belt vacuum filter for non-metallic mineral processing according to claim 1, characterized in that: The rear end of the drive cylinder (73) is provided with a lifting component (74). The lifting component (74) includes a vertical rail (742) provided on the inner surface of the rear end of the sealing cover (1). A sliding sleeve (743) is slidably sleeved on the vertical rail (742). The rear end of the drive cylinder (73) is fixed on the sliding sleeve (743). A connecting plate (745) is provided between the sliding sleeve (743) and the sleeve (725). The inner wall of the rear end of the sealing cover (1) is provided with a lifting cylinder (741) located on the right side of the vertical rail (742). The lower end of the piston rod inside the lifting cylinder (741) is fixed on the upper surface of the connecting plate (745).

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