Scrubbing flotation continuous operation equipment and method for high-purity quartz sand for photovoltaic crucible

Abstract

The invention discloses continuous operation equipment and method for scrubbing and flotation of high-purity quartz sand for a photovoltaic crucible, the operation equipment comprises a scrubbing device, at least one flotation device, at least one conveying device and a control device, each conveying device is provided with a feed port and a discharge port, the feeding ports are connected with the discharging end of the scrubbing device, and the discharging ports are connected with the feeding ends of the flotation devices correspondingly. The control device is electrically connected with the scrubbing device, the flotation device and the conveying device. Continuous and automatic operation of the high-purity quartz sand is achieved, pollution of the quartz sand in the manual transferring process can be avoided, the production efficiency is remarkably improved, and resource waste is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand purification technology, and in particular to a continuous operation device and method for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles. Background Art

[0002] High-purity quartz sand is widely used in semiconductors, optical fiber communications, photovoltaics, aerospace, and military industries. Its purification process mainly includes crushing, hand selection, magnetic separation, scrubbing, flotation, water quenching, leaching, etc. Among them, the scrubbing process can effectively remove a large amount of fine mineral mud attached to the surface of quartz particles, so that the physical and chemical properties of the product particle surface are not affected by impurity minerals as much as possible, ensuring the selectivity of the ore; the flotation process is mainly used for the effective separation of aluminum silicate minerals and quartz with extremely similar physical properties.

[0003] However, when using existing purification equipment to prepare high-purity quartz sand, each process is mostly carried out separately, and the scrubbed quartz sand particles are generally transferred to the flotation tank manually for flotation separation, which consumes manpower and material resources, has long operation time and low operation efficiency; and other impurities are easily introduced during the transfer process, which poses a risk of secondary pollution and further affects the purity of the quartz sand; in addition, the manual transfer method may also result in partial loss of quartz sand, resulting in a waste of resources. Therefore, designing a scrubbing and flotation continuous operation equipment and method for preparing high-purity quartz sand has important practical significance for removing impurities and purifying high-purity quartz sand and realizing automated continuous operation. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present invention proposes a continuous operation equipment and method for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles, which can realize continuous and automated purification operations, and solve the technical problems of low operating efficiency, easy pollution of quartz sand and waste of resources caused by the inability of existing high-purity quartz sand purification equipment to operate continuously.

[0005] In order to achieve the above technical purpose, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a continuous operation equipment for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles, comprising: A scrubbing device for removing impurities from the surface of the quartz particles; At least one flotation unit for separating floating impurities from quartz particles; At least one conveying device, each of which has a feed port and a discharge port, wherein the feed ports are connected to the discharge end of the scrubbing device, and the discharge ports are respectively connected to the feed ends of the plurality of flotation devices; A control device is electrically connected to the scrubbing device, the flotation device and the conveying device respectively to realize continuous and automated purification operations.

[0006] In some embodiments, each of the conveying devices includes a feed pipeline and a valve. The feed pipeline is a pipeline made of polytetrafluoroethylene material. The feed inlet and the feed outlet are respectively formed at both ends of the feed pipeline. The valve is arranged on the feed pipeline. The valve is electrically connected to the control device to open or close the feed pipeline.

[0007] In some embodiments, the scrubbing device includes a scrubbing tank, a first driving mechanism, a stirring mechanism, a drug adding mechanism and a first drainage mechanism, a first inlet is formed at an upper portion of one side of the scrubbing tank, a first outlet is formed at the bottom of the scrubbing tank, the first inlet is connected to an outlet of a previous process device, the first outlet is respectively connected to a plurality of feed ports, the first driving mechanism is fixed to the top of the scrubbing tank and is transmission-connected to the stirring mechanism, the stirring mechanism is located in the scrubbing tank, the drug adding mechanism is arranged outside the scrubbing tank and its drug outlet is located in the scrubbing tank, and the first drainage mechanism is arranged on a side of the scrubbing tank; Wherein, the first driving mechanism, the drug adding mechanism and the first drainage mechanism are electrically connected to the control device respectively.

[0008] In some embodiments, the drug adding mechanism includes a storage tank, a drug delivery pipe and a delivery pump. The storage tank is arranged on the outside of one side of the scrubbing tank, the drug outlet of the drug delivery pipe is arranged in the scrubbing tank, the delivery pump is arranged on the pipeline of the drug delivery pipe and fixed to the top of the storage tank, and the delivery pump is electrically connected to the control device.

[0009] In some embodiments, each of the flotation devices comprises a flotation tank, a second driving mechanism, a stirring and aerating mechanism and a surfactant adding mechanism, a second inlet is formed at an upper portion of one side of the flotation tank, a second outlet is formed at the bottom of the flotation tank, the second inlet is connected to the discharge port, the second outlet is connected to the inlet of the next-stage process device, the second driving mechanism is arranged at the top of the flotation tank, a transmission shaft of the second driving mechanism extends into the interior of the flotation tank and is in driving connection with the stirring and aerating mechanism, and the outlet of the surfactant adding mechanism is arranged in the flotation tank; Wherein, the second driving mechanism and the surfactant adding mechanism are electrically connected to the control device respectively.

[0010] In some embodiments, the flotation device further comprises a temperature control mechanism, a pH adjustment mechanism and a pulp concentration maintaining mechanism, and the temperature control mechanism, the pH adjustment mechanism and the pulp concentration maintaining mechanism are electrically connected to the control device respectively.

[0011] In some embodiments, the temperature control mechanism includes a temperature detector and a heater, and the temperature detector and the heater are disposed in the flotation tank and are electrically connected to the control device respectively.

[0012] In some embodiments, the pH adjustment mechanism includes a slurry pH detector, an acid-adding pipeline and an alkali-adding pipeline, the outlet ends of the acid-adding pipeline and the alkali-adding pipeline are respectively located in the flotation tank, and the acid-adding pipeline and the alkali-adding pipeline are both provided with a first control valve, and the first control valve and the pH detector are respectively electrically connected to the control device.

[0013] In some embodiments, the slurry concentration maintaining mechanism includes a slurry concentration detector, a vibrating feeder, a discharge pipe and a drainage pipe, and the discharge pipe and the drainage pipe are both provided with a second control valve, and the second control valve, the vibrating feeder and the slurry concentration detector are electrically connected to the control device respectively.

[0014] In a second aspect, the present invention provides a method for continuous scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles. The method is implemented based on the high-purity quartz sand continuous scrubbing and flotation equipment provided in the first aspect of the present invention, and comprises the following steps: Step S1, sending quartz sand into a scrubbing device for scrubbing to remove impurities on the surface of quartz particles; Step S2, controlling the discharge of the scrubbing device through the control device, discharging the scrubbed quartz sand from each feed port to the corresponding conveying device, and then discharging it from the discharge port of the conveying device to the corresponding flotation device; Step S3, flotation is performed on the scrubbed quartz sand by using a plurality of the flotation devices simultaneously to separate floating impurity minerals in the quartz particles.

[0015] The beneficial effects of the present invention are: The present invention provides a continuous operation equipment and method for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles. The uninterrupted operation of the quartz sand purification process is realized by the provided conveying device, which can effectively improve production efficiency, reduce manpower and material resources, and reduce environmental pollution. After scrubbing, impurities such as dust, clay minerals, fine-grained minerals, and film iron attached to the surface of quartz particles can be effectively removed. The scrubbed samples are then subjected to flotation purification operations, which can significantly reduce reagent loss, reduce purification operation costs, and further reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a general diagram of the continuous operation equipment of the present invention (three flotation devices are provided); Figure 2 It is a general diagram of the continuous operation equipment of the present invention (with a flotation device); Figure 3is a cross-sectional view of the continuous operation equipment of the present invention (with a flotation device); Figure 4 It is a structural schematic diagram of the valve of the present invention; Figure 5 is a schematic structural diagram of the scrubbing device of the present invention; Figure 6 It is a flow chart of the continuous operation method of the present invention.

[0017] The following are the descriptions of the reference numerals: 100, flotation device, 110, flotation tank, 111, second inlet, 112, second outlet, 120, second driving mechanism, 130, stirring and aerating mechanism, 140, surfactant adding mechanism, 150, temperature control mechanism, 160, pH adjustment mechanism, 170, slurry concentration maintaining mechanism, 180, scraper, 103, tailings collecting port, 104, second drainage mechanism; 200, conveying device, 201, feed port, 202, discharge port, 210, conveying pipeline, 220, valve, 221, valve body, 222, valve seat, 223, valve core, 224, pneumatic actuator; 300. Scrubbing device, 310. Scrubbing tank, 311. First inlet, 312. First outlet, 320. First driving mechanism, 330. Stirring mechanism, 340. Drug adding mechanism, 341. Storage tank, 342. Drug delivery pipe, 343. Delivery pump, 350. First drainage mechanism. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In view of the technical problems in the prior art of manually transferring the scrubbed quartz sand to a flotation device for flotation, which has low efficiency, easy contamination and possible waste of resources, the present invention proposes a continuous operation equipment and method for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles, which can effectively solve the problem of continuous operation of the scrubbing-flotation process and realize the continuous and automated purification operation of high-purity quartz sand.

[0020] See also Figure 1 and 2As shown, the present invention provides a high-purity quartz sand scrubbing and flotation continuous operation equipment for photovoltaic crucibles, comprising at least one flotation device 100, at least one conveying device 200, a scrubbing device 300 and a control device, wherein the number of the conveying devices 200 corresponds to the number of the flotation devices 100, the scrubbing device 300 is used to remove impurities on the surface of quartz particles; the flotation device 100 is used to separate floating impurity ores in quartz particles; the conveying device 200 is used to convey the scrubbed quartz sand to the corresponding flotation device 100; each of the conveying devices 200 has a feed port 201 and a discharge port 202, a plurality of the feed ports 201 are connected to the discharge end of the scrubbing device 300, and a plurality of the discharge ports 202 are respectively connected to the feed ends of a plurality of the flotation devices 100; the control device is electrically connected to the scrubbing device 300, the flotation device 100 and the conveying device 200, respectively, to realize continuous and automated purification operations.

[0021] The present invention can control the scrubbing device 300 to automatically scrub and discharge, control the conveying device 200 to automatically feed, and control the flotation device 100 to automatically float and discharge through the control device, thereby realizing the continuous and automated operation of the high-purity quartz sand purification process. Compared with the prior art, it can significantly improve production efficiency, reduce manpower and material resources, and reduce environmental pollution. In general, the uninterrupted operation equipment and method provided by the present invention can improve the purity and recovery rate of quartz products while reducing production costs and environmental pollution on the basis of considering technical, economic, environmental and other factors.

[0022] It can be understood that, in order to better fix and implement the process, the flotation device 100 and the scrubbing device 300 of the present invention are respectively installed on their own frames.

[0023] In addition, in the prior art, some scrubbing devices and flotation devices require manual intervention during operation, for example, the flotation operation requires manual adjustment of the slurry temperature, slurry pH value, slurry concentration, and added reagents, etc.; the scrubbing operation requires manual addition of reagent dosage, etc. These manual intervention methods may not only cause reagent waste and increase production costs, but also commonly used reagents may cause harm to the environment and human body. The high-purity quartz sand scrubbing and flotation continuous operation equipment provided by the present invention is provided with a temperature control mechanism 150, a pH adjustment mechanism 160, a slurry concentration maintenance mechanism 170, a reagent adding mechanism 340, and corresponding valves to address the above technical problems, and these mechanisms are electrically connected to the control device 400. Therefore, the present invention also achieves quantitative reagent addition by optimizing process parameters and equipment design, reduces manual intervention, reduces reagent waste, and reduces environmental pollution.

[0024] The components and working principles of the high-purity quartz sand scrubbing and flotation continuous operation equipment provided by the present invention are described in detail below.

[0025] In one embodiment, a feed port 201 and a discharge port 202 are respectively formed at both ends of each of the conveying devices 200, and the conveying device 200 includes a feed pipeline 210 and a valve 220. The feed pipeline 210 is a pipeline made of polytetrafluoroethylene material. The valve 220 is disposed on the feed pipeline 210, and the valve 220 is electrically connected to the control device to open or close the feed pipeline 210.

[0026] In one embodiment, if Figure 4 As shown, the valve 220 is a pneumatic valve, which includes a valve body 221, a valve seat 222, a valve core 223 and a pneumatic actuator 224. The valve body 221 is the main part of the pneumatic valve 220, which is usually made of cast iron, cast steel, stainless steel and other materials. Its main function is to support and fix other components and withstand the pressure of the medium; the valve seat 222 is a gasket on the valve body 221, which plays a sealing role and is usually made of rubber, polytetrafluoroethylene and other materials; the valve core 223 is an important component of the pneumatic valve 220, which is also used to control the fluid. It can control the switch according to the signal of the pneumatic actuator 224 In order to control the flow and pressure of the medium, the material of the valve core 223 can be polytetrafluoroethylene, para-polyphenylene and other materials that will not pollute the quartz sand products; the pneumatic actuator 224 is one of the important components of the pneumatic valve 220, which can convert the pneumatic signal into mechanical movement to open or close the valve. Commonly used pneumatic actuators 224 are cylinder type and diaphragm type; in addition to these main components, the pneumatic valve 220 also includes connectors, seals, etc. When selecting and using pneumatic valves, it is necessary not only to consider the quality and materials of various components, but also to select and adjust according to the working environment and the properties of the medium.

[0027] In one embodiment, if Figure 3 and Figure 5As shown, the scrubbing device 300 is used to remove impurities such as dust, clay minerals, fine-grained minerals, and thin-film iron on the surface of particles. The scrubbing device 300 includes a scrubbing tank 310, a first driving mechanism 320, a stirring mechanism 330, a reagent adding mechanism 340, and a first drainage mechanism 350. A first inlet 311 is formed at the upper part of one side of the scrubbing tank 310, and a first outlet 312 is formed at the bottom of the scrubbing tank. The first inlet 311 is connected to the outlet of the upper process device, and the first outlet 312 is respectively connected to the plurality of feed ports. 201 is connected, the first driving mechanism 320 is fixed on the top of the scrubbing tank 310 and is transmission-connected with the stirring mechanism 330, the stirring mechanism 330 is located in the scrubbing tank 310, the drug adding mechanism 340 is arranged on the outside of the scrubbing tank 310 and its drug outlet is located in the scrubbing tank 310, and the first drainage mechanism 350 is arranged on one side of the scrubbing tank 310; the first driving mechanism 320, the drug adding mechanism 340 and the first drainage mechanism 350 are electrically connected to the control device respectively.

[0028] In one embodiment, the drug adding mechanism 340 includes a storage tank 341, a drug delivery pipe 342 and a delivery pump 343. The storage tank 341 is arranged on the outside of one side of the scrubbing tank 310, and the drug outlet of the drug delivery pipe 342 is arranged in the scrubbing tank 310. The delivery pump 343 is arranged on the pipeline of the drug delivery pipe 342 and fixed on the top of the storage tank 341. The delivery pump 343 is electrically connected to the control device.

[0029] In one embodiment, if Figure 2 and Figure 3 As shown, each of the flotation devices 100 includes a flotation cell 110, a second driving mechanism 120, a stirring and aerating mechanism 130 and a surfactant adding mechanism 140. A second inlet 111 is formed at an upper portion of one side of the flotation cell 110, and a second outlet 112 is formed at the bottom of the flotation cell. The second inlet 111 is connected to the discharge port 202, and the second outlet 112 is connected to the inlet of the next-stage process device. The second driving mechanism 120 is arranged at the top of the flotation cell 110, and the transmission shaft of the second driving mechanism 120 extends into the interior of the flotation cell 110 and is transmission-connected to the stirring and aerating mechanism 130. The outlet of the surfactant adding mechanism 140 is arranged in the flotation cell 110, and the second driving mechanism 120 and the surfactant adding mechanism 140 are electrically connected to the control device respectively.

[0030] In this way, the control device controls the second driving mechanism 120 to drive the stirring and aerating mechanism 130 to inject air into the flotation tank 110 and stir it, so that the flotation agent forms foam. The flotation agent changes the surface properties of the minerals. The impurity minerals adhere to the foam surface and float up along with the foam, and are then separated from the quartz sand, thereby achieving the purpose of impurity removal.

[0031] In one embodiment, the interior of the flotation tank 110 is filled with anti-corrosion materials, the top of the anti-corrosion materials is connected to a PP machine cover, and the transmission shaft of the second driving mechanism 120 passes through the PP machine cover and is set in the flotation tank 110.

[0032] In one embodiment, the side of the flotation cell 110 is further provided with a tailings collecting port 103 for collecting tailings; the side of the flotation cell 110 is further provided with a second drainage mechanism 104 below the tailings collecting port 103 for drainage.

[0033] In one embodiment, the flotation device 100 further includes a temperature control mechanism 150, a pH adjustment mechanism 160 and a pulp concentration maintaining mechanism 170, and the temperature control mechanism 150, the pH adjustment mechanism 160 and the pulp concentration maintaining mechanism 140 are electrically connected to the control device, respectively.

[0034] In one embodiment, the temperature control mechanism 150 includes a temperature detector and a heater, and the temperature detector and the heater are disposed in the flotation tank 110 and are electrically connected to the control device respectively.

[0035] In one embodiment, the pH adjustment mechanism 160 includes a slurry pH detector, an acid-adding pipeline and an alkali-adding pipeline, the outlet ends of the acid-adding pipeline and the alkali-adding pipeline are respectively located in the flotation tank 110, and the acid-adding pipeline and the alkali-adding pipeline are both provided with a first control valve, and the first control valve and the pH detector are respectively electrically connected to the control device.

[0036] In one embodiment, the slurry concentration maintaining mechanism 170 includes a slurry concentration detector, a vibrating feeder, a discharge pipe and a drainage pipe, and the discharge pipe and the drainage pipe are both provided with a second control valve, and the second control valve, the vibrating feeder and the slurry concentration detector are electrically connected to the control device respectively.

[0037] In one embodiment, a scraper 180 is further disposed in the flotation tank 110 .

[0038] In one embodiment, the control device includes a digital display screen and a remote controller, and the digital display screen can be installed on a rack of each device.

[0039] On the other hand, Figure 6 As shown, the present invention also provides a method for continuous operation of scrubbing and flotation of photovoltaic crucibles with high-purity quartz sand. The method is implemented based on the continuous operation equipment for scrubbing and flotation of photovoltaic crucibles with high-purity quartz sand provided by the present invention, and is characterized in that it comprises the following steps: Step S1, sending quartz sand into the scrubbing device 300 for scrubbing to remove impurities on the surface of quartz particles; Step S2, controlling the scrubbing device 300 to discharge materials through the control device, discharging the scrubbed quartz sand from each feed port 201 to the corresponding conveying device 200, and then discharging from the discharge port 202 of the conveying device 200 to the corresponding flotation device 100; Step S3, using a plurality of the flotation devices 100 to simultaneously flotate the scrubbed quartz sand to separate floating impurity minerals in the quartz particles.

[0040] Through the above technical scheme, the present invention provides a continuous operation method for scrubbing and flotation of high-purity quartz sand for photovoltaic crucibles, which has the advantages of high production efficiency, good cost-effectiveness, environmental protection and high degree of automation, and is suitable for the demand for high-purity quartz sand in the photovoltaic and semiconductor industries.

[0041] In one embodiment, step S3 also includes a process of controlling the temperature, pH value and concentration of the slurry in the flotation device 100 .

[0042] The following is a detailed description of the scrubbing process of the scrubbing device 300, the automatic control process of the temperature, pH value and concentration of the slurry of the flotation device 100, and the automatic feeding process of the conveying device 200: (i) The scrubbing process comprises the following steps: Step 1, feeding, the main materials specifically include samples, aqueous solutions and pharmaceutical agents; Step 1.1, parameter setting: setting the given sample weight of the first inlet 311, the concentration N0 of the rubbing (grinding) washing mineral-containing solution, the reagent type and concentration C0, and setting the error range N, C through the controller; Step 1.2, data acquisition: transmit real-time data through the controller, based on the actual concentration N1 and the drug concentration C1; Step 1.3, data processing: compare and judge the collected real-time scrubbing (grinding) washing mineral solution concentration N1 and reagent concentration C1 with the set concentrations N0 and C0, and control the reagent adding mechanism 340 to determine whether to adjust the mineral solution concentration and whether to add reagents according to the judgment result through the controller; Step 1.3.1, the controller receives the real-time data of concentration N1 and degree C1 transmitted by the controller every t1 seconds, and compares the real-time value with the set value through the controller to obtain the concentration difference ΔN = N1-N0 and ΔC = C1-T0; Step 1.3.2, the controller compares the absolute value of the temperature difference ΔN, ΔC with the error values ​​N, C to determine whether the automatic adding device starts working, specifically: when the absolute value of the difference ΔN, ΔC is less than / equal to the set error values ​​N, C, the controller automatically stops the adding device; when the absolute value of the difference ΔN, ΔC is greater than the set error values ​​N, C, the controller controls the automatic adding device to start working; Step 2, scrubbing (rubbing) washing operation, the controller controls the stirring mechanism 330 to stir, and sets the stirring speed and stirring time, specifically: Step 2.1: Parameter setting: Set the stirring speed R and stirring time t2 through the controller.

[0043] Step 2.2: Program running: After setting the parameters, the controller controls the scrubbing (grinding) washing machine to perform the scrubbing (grinding) washing operation. When the operation running time reaches t2, the controller controls the stirring mechanism 330 to stop stirring, and the operation ends; Step 3, draining water, the controller controls the valve switch of the first drainage mechanism 350 to drain water, specifically: Step 3.1, the controller controls the opening or closing of the valve of the first drainage mechanism 350. The controller needs to transmit and control the actual opening time t3 of the drainage valve to compare with the set opening time t4. When the actual opening time t3 of the valve of the first drainage mechanism 350 is less than the set opening time t4 of the drainage electric valve, the controller controls the drainage electric valve to remain in the open state to continuously drain water. Step 3.2, when the actual opening time t3 of the drain electric valve is equal to the set opening time t4 of the drain valve, the controller sends a disconnection command to the drain electric valve, the drain electric valve closes, and the drainage ends.

[0044] (ii) The transmission process of the rubbed English sand through the conveying device 200 mainly includes the following steps: Step 4, set the end time t5 of the scrubbing (grinding) operation through the controller; obtain the actual operation time t6 through the controller detection, and control the discharge electric / pneumatic valve to remain closed or open through comparison, specifically: Step 4.1, when the actual operation time t6 is less than the set operation time t5, the controller controls the electric / pneumatic valve of the first outlet 312 to close and the ore is not discharged; Step 4.2, when the actual time t6 is equal to the set time t5, the controller controls the discharge electric / pneumatic valve to open and discharge the ore; the ore sample enters the tank through the polytetrafluoroethylene; Step 5, obtain the actual opening duration t7 and the set opening duration t8 of the discharge electric / pneumatic valve through the controller, compare the two, and then control the discharge electric / pneumatic valve to remain open or closed, specifically: Step 5.1, when the actual opening duration t7 of the discharge gas valve is less than the set opening duration t8 of the discharge electric / pneumatic valve, the controller controls the discharge electric valve to remain in the open state to continue discharge; Step 5.2, when the actual opening duration t7 of the ore discharge electric / pneumatic valve is equal to the set opening duration t8 of the ore discharge electric / pneumatic valve, the controller controls the ore discharge electric / pneumatic valve to close, thus ending ore discharge.

[0045] (III) The process of flotation operation by the flotation device 100 mainly includes the following steps: Step 6, solution concentration maintenance process, the controller sets the solution concentration value C0 in the flotation tank 110 and the concentration fluctuation value C1; collects the real-time ore-containing solution concentration value C2, compares C2 and C0, and controls the water supply and drainage regulating device to adjust the concentration according to the judgment result; Step 6.1, when C2 is less than (C0-C1), the controller controls the drainage pipe to drain water and increase the concentration; when C2 is equal to (C0-C1, C0+C1), no concentration adjustment is required; when C2 is greater than C0+C1, ​​the controller controls the water inlet pipe to supply water and reduce the concentration; Step 7, temperature control process, the controller sets the temperature value T0 and the temperature fluctuation value T1, and collects the real-time temperature T2; T2 is compared with T0, and the heater adjustment device is controlled to increase / lower the temperature according to the judgment result; Step 7.1, when T2 is less than (T0-T1), the controller controls the heater adjustment device to heat and increase the temperature; when T2 is equal to (T0-T1, T0+T1), no temperature adjustment is required; when T2 is greater than T0+T1, the controller controls the heater adjustment device to stop heating, and the temperature naturally decreases; Step 8, pH control process, the controller sets the pH value P0 and the pH fluctuation value P1; the collector collects the real-time pH value P2, compares and judges P2 and P0, and controls the pH adjustment device to increase / lower the pH according to the judgment result; Step 8.1, when P2 is less than P0-P1, the controller controls the pH adjustment device to adjust and increase the pH; when P2 is equal to (P0-P1, P0+P1), no pH adjustment is required; when P2 is greater than P0+P1, the controller controls the heater to adjust and reduce the pH; Steps 6-8 are performed simultaneously, and the concentration, temperature and pH are controlled within the set range; Step 9, flotation operation, the controller controls the impeller to rotate, adds reagents, and in the flotation tank 110, the impeller rotates, and after a period of sufficient diffusion, the air intake device starts to inflate. After a period of pre-inflation, stable foam is generated in the tank, and impurities float up; at this time, the scraper 180 starts to rotate, and the foam carrying impurities is sent to the tailings collection port 103; Step 10, drug removal operation. After the purification operation is completed, in order to prevent the drug from remaining, the controller controls the valve of the second drainage mechanism 104 to discharge the solution from the tank. After the solution is drained, the water inlet pipe is used for water supply. At this time, no drug is added, only pure water is added, and the drugs that may remain on the surface of the product particles after floating are cleaned by the rotation of the impeller. The controller can be set to perform multi-stage drug removal operations.

[0046] It should be noted that each device in the present invention can be replaced by a device of the same type, and the working principle of the device is consistent with the device. The equipment material needs to be corrosion-resistant and wear-resistant and meet the test requirements. The control device and other auxiliary equipment can be selected and adjusted according to the actual situation. For example, different types of rubbing (grinding) washing devices can be used as long as they can achieve the same rubbing (grinding) washing effect; if one rubbing (grinding) washing operation is not enough to meet the purification effect, multiple devices can be set in series to perform multiple operations; when the sample after rubbing by one device can be used for multiple flotation devices, one rubbing (grinding) device can also be connected to multiple flotation devices to achieve uninterrupted operation and production; electric / pneumatic valves can also be replaced by other types of valves, such as solenoid valves, manual valves, etc.; transmission pipes can also use different types, such as straight pipes, elbow pipes, etc., to adapt to different equipment layouts; different types of equipment can be used, such as mechanical equipment, flotation columns, etc., as long as they can achieve the same purification effect. In addition, upper and lower structure operating equipment can also be set to reduce the plant area and reduce the land cost of the enterprise. The choice of these alternatives should be based on factors such as actual needs, cost and operational convenience.

[0047] In summary, compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a set of equipment and method for uninterrupted rubbing-floating operation, which adds a rubbing (grinding) washing operation before floating, which can remove dust, clay minerals, fine-grained minerals and film iron on the surface of quartz particles, reduce the loss of reagents, and thus reduce environmental pollution, significantly improve the purification effect; reduce the degree of manual intervention, reduce manpower and material resources, avoid unnecessary pollution of products caused by the transfer process of the two-stage operation, and at the same time, improve production efficiency and stability; 2. The two purification operation equipment provided by the present invention significantly improve the automation level of purification operation to a certain extent, and can realize the automatic adjustment of reagents, solid-liquid ratio concentration, pH and dosage of reagents; it can realize the continuous automatic production of the two purification operations, and to a certain extent reduce the degree of manual intervention, avoid the excessive loss of reagents and products, and reduce environmental pollution. In addition, the centralized control operation of the central control system is simple, and the staff can use it conveniently, which significantly improves the efficiency and effect of purification operations; 3. The use of electric / pneumatic valves in product transmission pipelines has the advantages of fast response, high reliability, simple structure, and convenient maintenance; Pneumatic valve: A valve powered by air. It switches the valve by controlling the pressure of the air source, and can achieve a response time of milliseconds. It has no wearing parts, high reliability, and does not require auxiliary equipment such as power supply and wires. It can work stably for a long time in various environments and has a long service life. It has certain explosion-proof performance and can be used safely in flammable and explosive occasions. It has a simple structure and no wearing parts, and is very easy to maintain. It can be repaired and replaced in time when a fault occurs, which not only saves time and labor costs, but also reduces production losses caused by downtime. Electric valve: Through precise control systems, accurate adjustment of parameters such as flow and pressure of fluid media can be achieved, which can meet the needs of purification operations for high-precision control; it can achieve rapid opening and closing, short response time, and improve production efficiency, especially suitable for occasions that require rapid adjustment; by cooperating with the control system, electric valves can be remotely operated, which is convenient for operators to manage equipment without physical contact; electric valves are driven by motors, with relatively simple structures, reliable operation, and long-term stable operation and simple maintenance; precise control capabilities help reduce energy waste and achieve energy conservation and emission reduction; operation does not require the use of lubricants and other chemicals, which is harmless to the environment; automatic monitoring and alarming are achieved through intelligent control systems, reducing the risk of misoperation, thereby improving industrial production safety; using high-quality materials and advanced manufacturing processes, electric valves are corrosion-resistant, anti-oxidation, and anti-wear, with a long service life and reduced long-term maintenance costs. Compared with traditional manual valves, electric valves are easy to operate and can be achieved through remote controllers or intelligent devices, saving manpower and material resources and improving work efficiency; 4. The internal materials of the equipment are all polytetrafluoroethylene, which meets the production requirements of corrosion resistance, acid resistance, alkali resistance, wear resistance, etc., and will not cause pollution to the product.

[0048] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles, characterized in that: include: A scrubbing device for removing impurities from the surface of the quartz particles; At least one flotation unit for separating floating impurities from quartz particles; At least one conveying device, each of which has a feed port and a discharge port, wherein the feed ports are connected to the discharge end of the scrubbing device, and the discharge ports are respectively connected to the feed ends of the plurality of flotation devices; A control device is electrically connected to the scrubbing device, the flotation device and the conveying device respectively.

2. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 1 is characterized in that: Each of the conveying devices includes a material conveying pipeline and a valve. The feed inlet and the discharge outlet are respectively formed at both ends of the material conveying pipeline. The valve is arranged on the material conveying pipeline and is electrically connected to the control device to open or close the material conveying pipeline.

3. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 2 is characterized in that: The scrubbing device comprises a scrubbing tank, a first driving mechanism, a stirring mechanism, a drug adding mechanism and a first drainage mechanism, a first inlet is formed at an upper portion of one side of the scrubbing tank, a first outlet is formed at the bottom of the scrubbing tank, the first inlet is connected to the outlet of the upper-level process device, the first outlet is respectively connected to a plurality of the feed ports, the first driving mechanism is fixed to the top of the scrubbing tank and is transmission-connected to the stirring mechanism, the stirring mechanism is located in the scrubbing tank, the drug adding mechanism is arranged outside the scrubbing tank and its drug outlet is located in the scrubbing tank, and the first drainage mechanism is arranged on a side of the scrubbing tank; Wherein, the first driving mechanism, the drug adding mechanism and the first drainage mechanism are electrically connected to the control device respectively.

4. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 3 is characterized in that: The drug adding mechanism includes a storage tank, a drug delivery pipe and a delivery pump. The storage tank is arranged outside one side of the scrubbing tank, the drug outlet of the drug delivery pipe is arranged in the scrubbing tank, the delivery pump is arranged on the pipeline of the drug delivery pipe and fixed on the top of the storage tank, and the delivery pump is electrically connected to the control device.

5. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 2, characterized in that: Each of the flotation devices comprises a flotation tank, a second driving mechanism, a stirring and aerating mechanism and a surfactant adding mechanism. A second inlet is formed at an upper portion of one side of the flotation tank, a second outlet is formed at the bottom of the flotation tank, the second inlet is connected to the discharge port, the second outlet is connected to the inlet of the next-stage process device, the second driving mechanism is arranged at the top of the flotation tank, a transmission shaft of the second driving mechanism extends into the interior of the flotation tank and is in driving connection with the stirring and aerating mechanism, and the outlet of the surfactant adding mechanism is arranged in the flotation tank; Wherein, the second driving mechanism and the surfactant adding mechanism are electrically connected to the control device respectively.

6. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 5, characterized in that: The flotation device further comprises a temperature control mechanism, a pH adjustment mechanism and a pulp concentration maintaining mechanism, and the temperature control mechanism, the pH adjustment mechanism and the pulp concentration maintaining mechanism are electrically connected to the control device respectively.

7. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 6, characterized in that: The temperature control mechanism comprises a temperature detector and a heater, and the temperature detector and the heater are arranged in the flotation tank and are electrically connected to the control device respectively.

8. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 6, characterized in that: The pH adjustment mechanism includes a slurry pH detector, an acid-adding pipeline and an alkali-adding pipeline. The outlet ends of the acid-adding pipeline and the alkali-adding pipeline are respectively located in the flotation tank. The acid-adding pipeline and the alkali-adding pipeline are both provided with a first control valve. The first control valve and the pH detector are respectively electrically connected to the control device.

9. The high-purity quartz sand flotation acid leaching continuous operation equipment for photovoltaic crucibles according to claim 6, characterized in that: The slurry concentration maintaining mechanism includes a slurry concentration detector, a vibrating feeder, a discharge pipe and a drainage pipe. The discharge pipe and the drainage pipe are both provided with a second control valve. The second control valve, the vibrating feeder and the slurry concentration detector are electrically connected to the control device respectively.

10. A method for continuous operation of flotation acid leaching of high-purity quartz sand for photovoltaic crucibles, which is realized based on the continuous operation equipment for flotation acid leaching of high-purity quartz sand for photovoltaic crucibles according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step S1, sending quartz sand into a scrubbing device for scrubbing to remove impurities on the surface of quartz particles; Step S2, controlling the discharge of the scrubbing device through the control device, discharging the scrubbed quartz sand from each feed port to the corresponding conveying device, and then discharging it from the discharge port of the conveying device to the corresponding flotation device; Step S3, flotation is performed on the scrubbed quartz sand by using a plurality of the flotation devices simultaneously to separate floating impurity minerals in the quartz particles.

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