Method and equipment for preparing light building material by separating free silicon dioxide from feldspar

Abstract

The invention provides a method and equipment for preparing a light building material by separating free silicon dioxide from feldspar, and relates to the technical field of building material production, the method comprises the following steps: S1, removing impurities from feldspar: S11, performing hydraulic classification impurity removal: uniformly dispersing mineral separation tailings of granite mines and water according to the concentration of 7-20%, and pumping to a hydraulic classifier; -200-mesh silt slurry obtained by overflowing is collected and is subjected to belt type filtration removal; and grinding and screening the sand grains obtained by precipitation, and enabling the obtained particles to enter a subsequent process. According to the scheme, it is finally guaranteed that the final filler does not contain any crystalline silicon dioxide through deep separation of free silicon dioxide and a crystal transformation process, silicon lung diseases are completely eradicated from the source, and due to the low specific gravity characteristic of the material, the manufactured artificial stone plate is lighter in weight under the same size, and the cost is reduced. The composite material is especially suitable for dry-hanging outer walls and indoor decoration of high-rise buildings and super high-rise buildings, reduces building loads, and is a new-generation green building material.

Description

Technical Field

[0001] This invention relates to the field of building materials production, and in particular to a method and equipment for preparing lightweight building materials by separating free silica from feldspar. Background Technology

[0002] With the increasing demand for wear-resistant and stain-resistant materials in the construction industry, artificial quartz stone slabs have emerged. The filler used in artificial quartz stone slabs is its core component. Its main function is to reduce the amount of resin used and improve the product's hardness, wear resistance, and heat resistance. At the same time, it affects the appearance and mechanical properties of artificial stone. Currently, artificial quartz stone slabs are mostly made of quartz sand or quartz powder as the main filler, combined with a small amount of resin and colorant, and produced through high-pressure molding and high-temperature curing processes.

[0003] Currently, most artificial stone slabs use quartz sand or quartz powder as the main filler. The amount of ore mined is large, the finished product has a very high density, and it is not usually regarded as a lightweight building material. Moreover, the construction is difficult. Furthermore, the quartz sand or quartz powder used as the main filler contains free silica, which leads to silicosis in the construction of artificial quartz stone slabs. There is an urgent need for a new type of filler to replace the high-density quartz sand or quartz powder, reduce ore mining, and be used in the production of lightweight building materials.

[0004] Therefore, it is necessary to provide a method for preparing lightweight building materials by separating free silica from feldspar to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a method for preparing lightweight building materials by separating free silica from feldspar, which solves the problem that quartz sand or quartz powder, used as the main filler in artificial stone, contains free silica, resulting in high density of the finished product and large ore extraction volume.

[0006] To solve the above-mentioned technical problems, the method for preparing lightweight building materials by separating free silica from feldspar provided by the present invention includes the following steps:

[0007] Step S1: Remove impurities from feldspar:

[0008] S11. Hydraulic classification and impurity removal: The tailings from the granite mine are evenly dispersed with water at a concentration of 7%-20% and pumped to a hydraulic classifier; the overflow of -200 mesh mud and sand slurry is collected and removed by belt filtration; the sand particles obtained from sedimentation are ground and screened, and the resulting particles enter the subsequent process.

[0009] S12, Flotation for impurity removal: The material obtained in step S11 is subjected to flotation, with the core objective of removing mica, black particles, and reddish-yellow particles.

[0010] S13. Magnetic separation for impurity removal: The raw material after flotation in step S12 is subjected to multi-stage magnetic separation. The process includes drum magnetic separation, plate magnetic separation and high gradient magnetic separation.

[0011] Step S2, Deep separation of free silica float:

[0012] Acid flotation process is used to perform secondary flotation on the feldspar raw material after step S1. The core objective is to deeply separate and remove residual free silica, thereby obtaining high-purity low-silica feldspar concentrate. The flotation wastewater is transported to the treatment tower for oxidation pretreatment.

[0013] Step S3, medium-temperature calcination, crystal transformation:

[0014] The low-silica feldspar raw material obtained in step S2 is uniformly mixed with 5% by weight of soda ash and 5% by weight of calcium carbonate.

[0015] After mixing, the materials are preheated and fed into a rotary kiln for calcination in a medium temperature range of 1000℃-1380℃. The materials are then held at a temperature until they are in a semi-molten state before being discharged quickly and subjected to water quenching to complete the crystallization process and obtain a new filler for lightweight building materials.

[0016] Equipment for preparing lightweight building materials by separating free silica from feldspar, including a treatment tower, a treatment hood, a defoaming mechanism, and a dosing mechanism;

[0017] The defoaming mechanism includes a rotating shaft vertically disposed inside the processing tower and the processing hood. A connecting sleeve is fixedly disposed on the surface of the rotating shaft. Four defoaming plates are arranged in a circular array on the periphery of the connecting sleeve. A connecting ring is fixedly disposed on the top of the four defoaming plates.

[0018] The dosing mechanism includes a support plate fixed to the inner wall of the treatment tower. A dosing pipe is vertically rotatably connected inside the support plate. Multiple atomizing nozzles are connected to the surface of the dosing pipe. A drive gear is fixed to the top of the dosing pipe. A toothed assembly is fixed to the surface of the connecting ring.

[0019] Preferably, the dosing mechanism is arranged in a ring array of four groups inside the treatment tower. When the connecting ring drives the toothed group to rotate, the toothed group meshes with four driving gears in sequence, and drives the dosing pipe to rotate through the driving gears. The defoaming plate has multiple defoaming holes inside.

[0020] Preferably, a detection mechanism is fixedly provided on the inner wall of the treatment tower. The detection mechanism includes a mounting base fixedly provided on the inner wall of the treatment tower. A guide rod is vertically slidably connected inside the mounting base. A spring is sleeved on the circumferential side of the guide rod and at the top of the mounting base. A rotating seat is fixedly provided at the top of the guide rod. A rotating wheel is rotatably connected inside the rotating seat. A pH detector is fixedly provided at the bottom of the guide rod. A trigger bracket is fixedly provided at the bottom of the connecting ring.

[0021] Preferably, an emergency mechanism is fixedly provided on the surface of the rotating shaft. The emergency mechanism includes a rotating gear fixedly provided on the surface of the rotating shaft. A rotating shaft is vertically arranged inside the treatment hood. A drive disk is fixedly provided on the surface of the rotating shaft. A spray pipe is rotatably connected inside the treatment hood. Multiple spray heads are connected to the surface of the spray pipe. A swing rod is fixedly provided on the surface of the spray pipe. A contact wheel is rotatably connected to the top of the swing rod.

[0022] Preferably, the bottom of the contact wheel is in contact with the drive disk, and a transmission gear is fixedly provided at the bottom of the rotating shaft, the transmission gear meshing with the rotating gear.

[0023] Preferably, a mixing mechanism is fixedly provided on the surface of the rotating shaft. The mixing mechanism includes three connecting brackets fixedly provided on the surface of the rotating shaft. A mixing paddle is fixedly provided on the surface of each of the three connecting brackets. A connecting seat is fixedly provided on the top of the processing cover by bolts. A drive motor for driving the rotating shaft to rotate is provided on the top of the connecting seat.

[0024] Preferably, a photodisintegration cover is fixedly provided on the inner wall of the processing cover, the top of the rotating shaft is rotatably connected to the inside of the photodisintegration cover, a sealing plate is fixedly provided on the inner wall of the processing cover and at the top of the photodisintegration cover, two sets of ultraviolet lamps are fixedly provided at the bottom of the sealing plate, and the rotating shaft is rotatably connected to the photodisintegration cover and the sealing plate.

[0025] Preferably, the left side of the treatment tower is connected to a water inlet pipe, the right side of the treatment hood is connected to an exhaust pipe, the bottom of the treatment tower is connected to a drain pipe, and multiple support legs are arranged in a circular array on the periphery of the bottom of the treatment tower.

[0026] Compared with related technologies, the method for preparing lightweight building materials by separating free silica from feldspar provided by the present invention has the following beneficial effects:

[0027] Granite mine tailings undergo grinding, desliming, mica flotation, free silica flotation, and magnetic separation processes to achieve a magnetic content of less than 100 PPM in feldspar and 1%–20% undissociated free silica in the feldspar. This is followed by mixing with 5% soda ash and lime, medium-temperature melting, rapid reaction in a crystallization kiln, and water extraction to obtain a new filler for lightweight building materials. This method effectively reduces ore mining. Through deep separation of free silica and crystallization processes, it ensures that the final filler contains no crystalline silica, preventing silicosis at its source. Furthermore, the material's low specific gravity makes the manufactured artificial stone slabs lighter in weight for the same volume, making them particularly suitable for dry-hanging exterior walls and interior decoration of high-rise and super high-rise buildings, reducing building load and representing a new generation of green building materials. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 The composition analysis diagram of the magnetic separation product provided by this invention;

[0030] Figure 2 Chemical composition diagram of flotation reagent WQ-41-5 provided by the present invention;

[0031] Figure 3 The flotation product composition analysis diagram provided by this invention;

[0032] Figure 4 The phase identification diagram provided for this invention;

[0033] Figure 5 The phase analysis report diagram of the finished product provided for this invention;

[0034] Figure 6 The optimal structural schematic diagram provided for this invention;

[0035] Figure 7 for Figure 6 The diagram shows a structural schematic of the right view of the processing tower.

[0036] Figure 8 for Figure 6 The diagram shows a structural schematic of the cross-sectional view of the processing tower.

[0037] Figure 9 This is a schematic diagram of the defoaming mechanism and the dosing mechanism provided by the present invention;

[0038] Figure 10 A schematic diagram showing the state in which the connecting ring provided by the present invention drives the tooth assembly to rotate, thereby causing the drive gear to drive the dosing tube to rotate.

[0039] Figure 11 This is a schematic diagram of the detection mechanism structure provided by the present invention;

[0040] Figure 12 A schematic diagram showing the state in which the connecting ring provided by the present invention drives the trigger bracket to rotate, causing the guide rod to move the pH detector downward;

[0041] Figure 13 A schematic diagram of the emergency response mechanism provided by the present invention;

[0042] Figure 14 This is a schematic diagram of the structure of the hybrid mechanism provided by the present invention.

[0043] Explanation of icon numbers:

[0044] 1. Processing tower; 2. Processing hood;

[0045] 3. Defoaming mechanism; 31. Rotating shaft; 32. Connecting sleeve; 33. Defoaming plate; 34. Connecting ring;

[0046] 4. Dosing mechanism; 41. Support plate; 42. Dosing pipe; 43. Atomizing nozzle; 44. Drive gear;

[0047] 5. Tooth group;

[0048] 6. Testing mechanism; 61. Mounting base; 62. Guide rod; 63. Spring; 64. Rotating seat; 65. Rotating wheel; 66. pH detector; 67. Trigger bracket;

[0049] 7. Emergency mechanism; 71. Rotating gear; 72. Rotating shaft; 73. Drive disc; 74. Spray pipe; 75. Spray head; 76. Swing rod; 77. Contact wheel; 78. Transmission gear;

[0050] 8. Mixing mechanism; 81. Connecting bracket; 82. Mixing paddle; 83. Drive motor;

[0051] 9. Connector; 10. Photomask; 11. Sealing plate; 12. Ultraviolet lamp;

[0052] 13. Water inlet pipe; 14. Exhaust pipe; 15. Drain pipe; 16. Support leg. Detailed Implementation

[0053] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0054] This invention provides a method for preparing lightweight building materials by separating free silica from feldspar.

[0055] Please see Figures 1 to 5 A method for preparing lightweight building materials by separating free silica from feldspar includes the following steps:

[0056] Step S1: Remove impurities from feldspar:

[0057] S11. Hydraulic classification and impurity removal: The tailings from the granite mine are evenly dispersed with water at a concentration of 7%-20% and pumped to a hydraulic classifier; the overflow of -200 mesh mud and sand slurry is collected and removed by belt filtration; the sand particles obtained from sedimentation are ground and screened, and the resulting particles enter the subsequent process.

[0058] S12, Flotation for impurity removal: The material obtained in step S11 is subjected to flotation, with the core objective of removing mica, black particles, and reddish-yellow particles.

[0059] S13. Magnetic separation for impurity removal: The raw material after flotation in step S12 is subjected to multi-stage magnetic separation. The process includes drum magnetic separation, plate magnetic separation and high gradient magnetic separation.

[0060] Step S2, Deep separation of free silica float:

[0061] Acid flotation process is used to perform secondary flotation on the feldspar raw material after step S1. The core objective is to deeply separate and remove residual free silica, thereby obtaining high-purity low-silica feldspar concentrate. The flotation wastewater is transported to treatment tower 1 for oxidation pretreatment.

[0062] Step S3, medium-temperature calcination, crystal transformation:

[0063] The low-silica feldspar raw material obtained in step S2 is uniformly mixed with 5% by weight of soda ash and 5% by weight of calcium carbonate.

[0064] After mixing, the material is preheated and fed into a rotary kiln for calcination in a medium temperature range of 1000℃-1380℃. After holding the material in a semi-molten state, it is quickly discharged and water-quenched to complete the crystallization process, thus obtaining a new filler for lightweight building materials.

[0065] Preferably, in step S12, flotation reagent WQ-41-5 successfully removes mica, black spots, red and yellow skins, and other impurities from the raw flotation sand through impurity removal flotation, reducing Fe2O3 in the initial raw material to 0.01%, while maintaining the product yield above 90%, achieving feldspar impurity removal, laying a good foundation for subsequent purification processes, and maintaining low iron characteristics to avoid the introduction of iron impurities during the flotation process;

[0066] Preferably, the new filler is a low-density feldspar-based material. By completely replacing the high-density quartz sand with this material, the overall density of the artificial stone will decrease significantly.

[0067] In this embodiment, granite mine tailings are processed through grinding, desliming, mica flotation, free silica flotation, and magnetic separation to achieve a magnetic content of less than 100 PPM in feldspar and 1%-20% undissociated free silica in the feldspar. Then, by mixing with 5% soda ash and lime, and after medium-temperature melting, rapid reaction in a crystallization kiln, followed by water extraction, a new filler for lightweight building materials is obtained. This method effectively reduces ore mining. Through deep separation of free silica and crystallization processes, it ensures that the final filler contains no crystalline silica, preventing silicosis at its source. Furthermore, the material's low specific gravity makes the manufactured artificial stone slabs lighter in weight for the same volume, making them particularly suitable for dry-hanging exterior walls and interior decoration of high-rise and super high-rise buildings, reducing building load and representing a new generation of green building materials.

[0068] The present invention also provides an apparatus for preparing a new filler for lightweight building materials by separating feldspar free silica.

[0069] First embodiment:

[0070] Please see Figures 6 to 10 The equipment for preparing lightweight building materials by separating free silica from feldspar includes a treatment tower 1, a treatment hood 2, a defoaming mechanism 3, and a dosing mechanism 4.

[0071] The defoaming mechanism 3 includes a rotating shaft 31 vertically disposed inside the processing tower 1 and the processing hood 2. A connecting sleeve 32 is fixedly disposed on the surface of the rotating shaft 31. Four defoaming plates 33 are arranged in a ring array on the periphery of the connecting sleeve 32. A connecting ring 34 is fixedly disposed on the top of the four defoaming plates 33.

[0072] The dosing mechanism 4 includes a support plate 41 fixed to the inner wall of the treatment tower 1. A dosing pipe 42 is vertically rotatably connected inside the support plate 41. Multiple atomizing nozzles 43 are connected to the surface of the dosing pipe 42. A drive gear 44 is fixed to the top of the dosing pipe 42. A toothed assembly 5 is fixed to the surface of the connecting ring 34.

[0073] The dosing mechanism 4 is arranged in a ring array of four groups in the treatment tower 1. When the connecting ring 34 drives the toothed group 5 to rotate, the toothed group 5 meshes with four driving gears 44 in sequence, and drives the dosing pipe 42 to rotate through the driving gears 44. The defoaming plate 33 has multiple defoaming holes inside.

[0074] Please combine Figure 9 The rotating shaft 31 rotates, causing the connecting sleeve 32 to rotate. The rotating connecting sleeve 32 in turn drives multiple defoaming plates 33 and connecting ring 34 to rotate. The defoaming plates 33 rotate to defoam the foam through the defoaming holes and the plate body.

[0075] Please combine Figure 9 and Figure 10 When the connecting ring 34 rotates, it will simultaneously drive the tooth assembly 5 to rotate. When the tooth assembly 5 comes into contact with the drive gear 44, the drive gear 44 will drive the dosing pipe 42 and the atomizing nozzle 43 to rotate, thereby spraying the oxidant onto the wastewater surface.

[0076] Preferably, all four dosing tubes 42 are connected to a drug inlet hose. The four dosing tubes 42 operate by sequentially injecting drugs. When the toothed assembly 5 contacts one of the drive gears 44 and drives the drive gear 44 to rotate, the dosing tube 42 connected to the bottom of the drive gear 44 will start working.

[0077] Preferably, sodium hypochlorite is used as an oxidant to destroy the molecular structure of amine collectors and colloidal substances in flotation wastewater.

[0078] In this embodiment, when the rotating shaft 31 rotates, the connecting sleeve 32 simultaneously drives multiple defoaming plates 33 and connecting rings 34 to rotate. The defoaming plates 33 eliminate the foam generated by the flotation wastewater. When the connecting ring 34 rotates, it simultaneously drives the toothed assembly 5 to rotate. The rotation of the toothed assembly 5 then sequentially and intermittently drives multiple drive gears 44 to rotate. The rotation of the drive gears 44 drives the dosing pipe 42 and the atomizing nozzle 43 to swing, thereby spraying the oxidant onto the wastewater surface from different directions. The swinging spray can make the atomized sodium hypochlorite cover a larger liquid surface area, forming a fan-shaped coverage area. When the four sets of nozzles swing sequentially and alternately, a three-dimensional cross-shaped reagent distribution network can be formed in the treatment tower 1, reducing mixing dead zones and ensuring more sufficient contact between the wastewater and the oxidant.

[0079] Second embodiment:

[0080] Please see Figure 11 and Figure 12 The inner wall of the processing tower 1 is fixed with a detection mechanism 6. The detection mechanism 6 includes a mounting base 61 fixed to the inner wall of the processing tower 1. A guide rod 62 is vertically slidably connected inside the mounting base 61. A spring 63 is sleeved on the circumferential side of the guide rod 62 and at the top of the mounting base 61. A rotating seat 64 is fixed at the top of the guide rod 62. A rotating wheel 65 is rotatably connected inside the rotating seat 64. A pH detector 66 is fixed at the bottom of the guide rod 62. A trigger bracket 67 is fixed at the bottom of the connecting ring 34.

[0081] Please combine Figure 11 and Figure 12When the connecting ring 34 rotates, it will simultaneously drive the trigger bracket 67 to rotate. During the rotation of the trigger bracket 67, after it comes into contact with the rotating wheel 65, it will press the rotating wheel 65 downward. This will drive the guide rod 62 and the pH detector 66 to move downward through the rotating seat 64, causing the spring 63 to contract. The bottom end of the pH detector 66 is then inserted into the flotation wastewater.

[0082] Furthermore, when the connecting ring 34 continues to drive the trigger bracket 67 to rotate, after the trigger bracket 67 disengages from the rotating wheel 65, under the elastic force of the spring 63, the rotating seat 64 then drives the guide rod 62 and the pH detector 66 to reset upwards.

[0083] Preferably, after the connecting ring 34 drives the trigger bracket 67 to rotate one revolution, the four dosing pipes 42 will spray oxidant once in sequence from different directions, and the oxidant has been mixed with the flotation wastewater. At this time, the pH value of the wastewater can be detected by the pH detector 66 to improve the accuracy of the detection data.

[0084] In this embodiment, when the connecting ring 34 drives the trigger bracket 67 to rotate, and the trigger bracket 67 contacts the rotating wheel 65 and continues to rotate, the trigger bracket 67 will press the rotating seat 64 and the guide rod 62 downward through the rotating wheel 65, so that the bottom end of the pH detector 66 is inserted into the flotation wastewater to detect the pH value of the flotation wastewater. At this time, the four dosing pipes 42 have sprayed oxidant once from different directions in sequence. This detection method can improve the accuracy of real-time detection data of wastewater pH value. By monitoring the stability of pH value during the oxidation reaction stage, an accurate signal can be provided as to whether the subsequent neutralization process needs to be started.

[0085] Third embodiment:

[0086] Please see Figure 6 , Figure 7 , Figure 13 and Figure 14 An emergency mechanism 7 is fixedly mounted on the surface of the rotating shaft 31. The emergency mechanism 7 includes a rotating gear 71 fixedly mounted on the surface of the rotating shaft 31. A rotating shaft 72 is vertically arranged inside the treatment hood 2. A drive disk 73 is fixedly mounted on the surface of the rotating shaft 72. A spray pipe 74 is rotatably connected inside the treatment hood 2. A plurality of spray heads 75 are connected to the surface of the spray pipe 74. A swing rod 76 is fixedly mounted on the surface of the spray pipe 74. A contact wheel 77 is rotatably connected to the top of the swing rod 76.

[0087] The bottom of the contact wheel 77 is in contact with the drive disk 73, and the bottom of the rotating shaft 72 is fixed with a transmission gear 78, which meshes with the rotating gear 71.

[0088] A mixing mechanism 8 is fixedly provided on the surface of the rotating shaft 31. The mixing mechanism 8 includes three connecting brackets 81 fixedly provided on the surface of the rotating shaft 31. A mixing paddle 82 is fixedly provided on the surface of each of the three connecting brackets 81. A connecting seat 9 is fixedly provided on the top of the processing cover 2 by bolts. A drive motor 83 for driving the rotating shaft 31 to rotate is provided on the top of the connecting seat 9.

[0089] The inner wall of the processing cover 2 is fixedly provided with a photolysis cover 10. The top of the rotating shaft 72 is rotatably connected to the inside of the photolysis cover 10. The inner wall of the processing cover 2 and the top of the photolysis cover 10 are fixedly provided with a sealing plate 11. Two sets of ultraviolet lamps 12 are fixedly provided at the bottom of the sealing plate 11. The rotating shaft 31 is rotatably connected to the photolysis cover 10 and the sealing plate 11.

[0090] The left side of the treatment tower 1 is connected to a water inlet pipe 13, the right side of the treatment hood 2 is connected to an exhaust pipe 14, the bottom of the treatment tower 1 is connected to a drain pipe 15, and multiple support legs 16 are arranged in a circular array on the circumferential side of the bottom of the treatment tower 1.

[0091] Please combine Figure 12 When the rotating shaft 31 rotates, it will simultaneously drive the rotating gear 71 to rotate. The rotating gear 71 will then drive the transmission gear 78 to rotate. The transmission gear 78 will then drive the rotating shaft 72 and the drive disk 73 to rotate. Through the rotation of the drive disk 73, under the action of the contact wheel 77, the swing rod 76 will drive the spray pipe 74 and the spray head 75 to swing. Through the swing of the spray pipe 74 and the spray head 75, the treated wastewater will be sprayed onto the foam surface to defoam.

[0092] Preferably, a liquid level sensor is installed at the top of the treatment tower 1 to monitor the foam height. When the foam accumulates too quickly and exceeds the predetermined height, the PLC immediately starts the spray defoaming device. The spray defoaming device sprays the treated wastewater through the spray pipe 74 and the spray head 75 to quickly defoam the foam.

[0093] Please combine Figure 13 Start the drive motor 83, the drive motor 83 rotates and drives the rotating shaft 31 to rotate, the rotating shaft 31 rotates and drives the connecting bracket 81 and the mixing paddle 82 to rotate, thereby mixing the flotation wastewater and oxidant;

[0094] Preferably, the ultraviolet lamp 12 is used to emit ultraviolet light. The dispersed foam gas passes through the photodecomposition shield 10, and the residual amine volatile organic compounds are decomposed under ultraviolet light irradiation, losing their foaming ability.

[0095] In this embodiment, when the foam accumulates too quickly and exceeds the predetermined height, the rotating shaft 31 drives the rotating gear 71 to rotate. The rotation of the rotating gear 71 drives the transmission gear 78 and the rotating shaft 72 to rotate. The rotation of the rotating shaft 72 drives the drive disk 73 to rotate. With the cooperation of the contact wheel 77, the rotation of the drive disk 73 drives the spray pipe 74 and the spray head 75 to swing through the swing rod 76, spraying the treated wastewater onto the foam surface to quickly defoam the foam and avoid excessive foam interfering with the normal operation of the equipment. The swing spray can sweep the entire liquid surface and foam layer, and the contact between the treated wastewater and the foam is more sufficient. The defoaming efficiency is much higher than that of fixed point spraying.

[0096] Please refer to the reference again. Figures 6 to 14 The working principle of the equipment for preparing lightweight building materials by separating feldspar free silica provided by the present invention is as follows:

[0097] Step S1: Wastewater is transported to treatment tower 1 through inlet pipe 13. Then, drive motor 83 is started. Drive motor 83 rotates and drives rotating shaft 31 to rotate. Rotating shaft 31 rotates and drives connecting sleeve 32 to rotate. Rotating connecting sleeve 32 rotates and drives multiple defoaming plates 33 and connecting ring 34 to rotate. The defoaming plates 33 rotate to defoam the foam generated when the wastewater enters the water.

[0098] When the connecting ring 34 rotates, it will simultaneously drive the toothed assembly 5 to rotate. When the toothed assembly 5 comes into contact with the drive gear 44, the drive gear 44 will drive the dosing pipe 42 and the atomizing nozzle 43 to rotate, spraying the oxidant onto the wastewater surface. The four dosing pipes 42 operate in a sequential dosing manner. When the toothed assembly 5 comes into contact with one of the drive gears 44 and drives the drive gear 44 to rotate, the dosing pipe 42 connected to the bottom of the drive gear 44 will start working. When the four sets of nozzles swing sequentially and alternately, a three-dimensional cross-shaped agent distribution network can be formed in the treatment tower 1.

[0099] In step S2, the rotation of the rotating shaft 31 will drive the connecting bracket 81 and the mixing paddle 82 to rotate, thereby mixing the flotation wastewater and the oxidant.

[0100] When the connecting ring 34 rotates, it will simultaneously drive the trigger bracket 67 to rotate. During the rotation of the trigger bracket 67, after contacting the rotating wheel 65, it will press the rotating wheel 65 downward. This will drive the guide rod 62 and the pH detector 66 to move downward through the rotating seat 64, causing the spring 63 to contract. The bottom end of the pH detector 66 is inserted into the flotation wastewater. At this time, the four dosing pipes 42 will spray the oxidant once in sequence from different directions. The oxidant has already mixed with the flotation wastewater. By monitoring the stability of the pH value during the oxidation reaction stage, an accurate signal can be provided as to whether the subsequent neutralization process needs to be started.

[0101] Step S3: When the foam accumulates too quickly and exceeds the predetermined height, the rotating shaft 31 drives the rotating gear 71 to rotate. The rotating gear 71 then drives the transmission gear 78 to rotate. The transmission gear 78 drives the rotating shaft 72 and the drive disk 73 to rotate. The rotation of the drive disk 73, under the action of the contact wheel 77, causes the swing rod 76 to drive the spray pipe 74 and the spray head 75 to swing. The swing of the spray pipe 74 and the spray head 75 sprays the treated wastewater onto the foam surface to perform rapid emergency defoaming treatment.

[0102] In step S4, the dispersed foam gas passes through the photolysis hood 10, and the residual amine volatile organic compounds are decomposed under ultraviolet light and lose their foaming ability. The gas is discharged through the exhaust pipe 14, and the pretreated wastewater is discharged from the drain pipe 15. Then, it undergoes neutralization sedimentation, coagulation flocculation, advanced oxidation and other processes for deep treatment until the flotation wastewater meets the discharge standards.

[0103] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for preparing lightweight building materials by separating free silica from feldspar, characterized in that, Includes the following steps: Step S1, removing impurities from feldspar: S11. Hydraulic classification and impurity removal: The tailings from the granite mine are evenly dispersed with water at a concentration of 7%-20% and pumped to a hydraulic classifier; the overflow of -200 mesh mud and sand slurry is collected and removed by belt filtration; the sand particles obtained from sedimentation are ground and screened, and the resulting particles enter the subsequent process. S12, Flotation for impurity removal: The material obtained in step S11 is subjected to flotation, with the core objective of removing mica, black particles, and reddish-yellow particles. S13. Magnetic separation for impurity removal: The raw material after flotation in step S12 is subjected to multi-stage magnetic separation. The process includes drum magnetic separation, plate magnetic separation and high gradient magnetic separation. Step S2, Deep separation of free silica float: Acid flotation process is used to perform secondary flotation on the feldspar raw material after step S1. The core objective is to deeply separate and remove residual free silica, thereby obtaining high-purity low-silica feldspar concentrate. The flotation wastewater is transported to the treatment tower for oxidation pretreatment. Step S3, medium-temperature calcination, crystal transformation: The low-silica feldspar raw material obtained in step S2 is uniformly mixed with 5% by weight of soda ash and 5% by weight of calcium carbonate. After mixing, the materials are preheated and fed into a rotary kiln for calcination in a medium temperature range of 1000℃-1380℃. The materials are then held at a temperature until they are in a semi-molten state before being discharged quickly and subjected to water quenching to complete the crystallization process and obtain a new filler for lightweight building materials.

2. A device for separating free silica from feldspar to prepare a new filler for lightweight building materials, characterized in that, The equipment for preparing new fillers for lightweight building materials is used in the method for preparing new fillers for lightweight building materials as described in claim 1, and includes a treatment tower, a treatment hood, a defoaming mechanism, and a dosing mechanism; The defoaming mechanism includes a rotating shaft vertically disposed inside the processing tower and the processing hood. A connecting sleeve is fixedly disposed on the surface of the rotating shaft. Four defoaming plates are arranged in a circular array on the periphery of the connecting sleeve. A connecting ring is fixedly disposed on the top of the four defoaming plates. The dosing mechanism includes a support plate fixed to the inner wall of the treatment tower. A dosing pipe is vertically rotatably connected inside the support plate. Multiple atomizing nozzles are connected to the surface of the dosing pipe. A drive gear is fixed to the top of the dosing pipe. A toothed assembly is fixed to the surface of the connecting ring.

3. The equipment for preparing lightweight building materials by separating feldspar free silica according to claim 2, characterized in that, The dosing mechanism is arranged in a ring array of four groups inside the treatment tower. When the connecting ring drives the toothed group to rotate, the toothed group meshes with four drive gears in sequence, and drives the dosing pipe to rotate through the drive gears. The defoaming plate has multiple defoaming holes inside.

4. The equipment for preparing lightweight building materials by separating feldspar free silica according to claim 2, characterized in that, The inner wall of the treatment tower is fixed with a detection mechanism. The detection mechanism includes a mounting base fixed to the inner wall of the treatment tower. A guide rod is vertically slidably connected inside the mounting base. A spring is sleeved on the circumferential side of the guide rod and at the top of the mounting base. A rotating seat is fixed at the top of the guide rod. A rotating wheel is rotatably connected inside the rotating seat. A pH detector is fixed at the bottom of the guide rod. A trigger bracket is fixed at the bottom of the connecting ring.

5. The apparatus for preparing lightweight building materials by separating free silica from feldspar according to claim 2, characterized in that, An emergency mechanism is fixed to the surface of the rotating shaft. The emergency mechanism includes a rotating gear fixed to the surface of the rotating shaft. A rotating shaft is vertically arranged inside the treatment hood. A drive disk is fixed to the surface of the rotating shaft. A spray pipe is rotatably connected inside the treatment hood. Multiple spray heads are connected to the surface of the spray pipe. A swing rod is fixed to the surface of the spray pipe. A contact wheel is rotatably connected to the top of the swing rod.

6. The apparatus for preparing lightweight building materials by separating free silica from feldspar according to claim 5, characterized in that, The bottom of the contact wheel is in contact with the drive disc, and a transmission gear is fixed at the bottom of the rotating shaft. The transmission gear meshes with the rotating gear.

7. The apparatus for preparing lightweight building materials by separating feldspar free silica according to claim 2, characterized in that, A mixing mechanism is fixed to the surface of the rotating shaft. The mixing mechanism includes three connecting brackets fixed to the surface of the rotating shaft. A mixing paddle is fixed to the surface of each of the three connecting brackets. A connecting seat is fixed to the top of the processing cover by bolts. A drive motor for driving the rotating shaft to rotate is provided on the top of the connecting seat.

8. The apparatus for preparing lightweight building materials by separating feldspar free silica according to claim 5, characterized in that, The inner wall of the processing cover is fixed with a photodisintegration cover, the top of the rotating shaft is rotatably connected to the inside of the photodisintegration cover, a sealing plate is fixedly installed on the inner wall of the processing cover and at the top of the photodisintegration cover, two sets of ultraviolet lamps are fixedly installed at the bottom of the sealing plate, and the rotating shaft is rotatably connected to the photodisintegration cover and the sealing plate.

9. The apparatus for preparing lightweight building materials by separating feldspar free silica according to claim 2, characterized in that, The left side of the treatment tower is connected to a water inlet pipe, the right side of the treatment hood is connected to an exhaust pipe, the bottom of the treatment tower is connected to a drain pipe, and multiple support legs are arranged in a circular array on the periphery of the bottom of the treatment tower.

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