Method for preparing high-purity quartz sand by purifying vein quartz
The method of preparing high-purity quartz sand through vein quartz purification, combined with the design of pickling equipment, solves the problem of acidic solution residue caused by volatile acidic solution and high porosity of quartz sand in conventional pickling processes, and achieves the effect of improving the purification efficiency of quartz sand and reducing costs.
Patent Information
- Application Number
- CN202510447448.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-05-16
AI Technical Summary
In the conventional pickling process, in order to ensure the pickling efficiency of quartz sand, it is necessary to maintain the high temperature of the acidic solution, which makes hydrofluoric acid and hydrochloric acid volatile, endangering the health of staff. At the same time, the porosity of quartz sand is high, resulting in the residue of acidic solution, increasing the deacidification time and reducing the purification efficiency.
The high-purity quartz sand is prepared by vein quartz purification, including roasting, water quenching, crushing, screening, flotation and pickling treatment. By designing the pickling equipment, the first baffle, the second baffle and the air extraction assembly can be used to achieve the reflux of the acid solution and the suction of toxic gases, reducing the residual acid solution and the diffusion of harmful gases.
It effectively reduces the volatility and residue of acidic solutions, reduces the health risks of staff, shortens the deacidification time of quartz sand, improves the purification efficiency of quartz sand, reduces the waste of acidic solutions, and reduces the purification cost.
Smart Images
Figure CN120004281A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of quartz sand production, and in particular to a method for purifying vein quartz to prepare high-purity quartz sand. Background Art
[0002] In the conventional pickling process, the acid solution needs to maintain a relatively high temperature to ensure the pickling efficiency of the quartz sand. In this way, the hydrofluoric acid, hydrochloric acid and the like in the acid solution are easily volatilized and dissipated into the air by heat, which can easily cause damage to the respiratory system of the workers in the long run. Moreover, after the pickling is completed, since the size of the pickled quartz sand is usually small and the porosity between the quartz sand is high, the capillary action increases, that is, the acid solution is easily accumulated in the pores of the quartz sand, resulting in an increase in the content of the residual acid solution in the quartz sand. The increase in the content of the residual acid solution will lead to an increase in the subsequent deacidification time of the quartz sand, thereby reducing the efficiency of the quartz sand purification.
[0003] In summary, the present application proposes a method for purifying vein quartz to prepare high-purity quartz sand, which improves the technical problems mentioned above. Summary of the invention
[0004] In order to overcome the disadvantages that in conventional pickling process, in order to ensure the pickling efficiency of quartz sand, the acid solution needs to be kept at a high temperature, but this causes hydrofluoric acid, hydrochloric acid and the like to volatilize easily, endangering the health of workers, and at the same time, due to the high porosity of quartz sand, the acid solution is easily accumulated in the pores of the quartz sand, which increases the subsequent deacidification time and reduces the overall efficiency of quartz sand purification. The present invention provides a method for purifying vein quartz to prepare high-purity quartz sand.
[0005] Technical solution: A method for purifying vein quartz to prepare high-purity quartz sand, comprising the following steps: S1, roasting and water quenching the massive vein quartz ore; S2, crushing and screening the raw ore after water quenching; S3, selecting raw ore samples that meet the target particle size requirements, and performing flotation treatment to obtain flotation concentrate and flotation tailings; S4. The concentrate obtained by flotation is subjected to acid washing to obtain quartz concentrate.
[0006] A pickling device for purifying vein quartz to prepare high-purity quartz sand, comprising a bottom plate and a support rod; four support rods are fixedly connected to the bottom plate; the bottom plate is located in the pickling tank; it also comprises a first filter screen, a fixing frame, a driving assembly, a first baffle, a second baffle and an exhaust assembly; a first filter screen for intercepting quartz sand is installed between every two support rods on the same side; the first filter screen is woven with polytetrafluoroethylene material; a fixing frame is fixedly connected to the upper side of all the first filter screens, and the fixing frame is a rectangular frame structure; a fixing frame is arranged on the upper side of the support rod; four fixing plates arranged in a rectangular shape are fixedly connected to the lower side of the fixing frame; the distribution spacing of the fixing plates is consistent with the distribution spacing of the support rods; a latch is plugged into each fixing plate; each support rod A first through hole is provided on each fixing plate; a second through hole corresponding to the diameter of the pin is opened on each fixing plate; the diameter of each first through hole corresponds to the diameter of the adjacent pin; a driving assembly is installed on the fixing frame; a first baffle plate for filter pressing quartz sand is connected to the driving assembly; the first baffle plate is rectangular in shape, and the outer contour of the first baffle plate is consistent with the inner contour of the fixing frame; a second baffle plate is connected to the driving assembly; the second baffle plate is a rectangular frame structure, and the inner contour of the second baffle plate is consistent with the outer contour of the fixing frame; the first baffle plate and the second baffle plate are driven to move up and down by the driving assembly; an exhaust assembly for extracting toxic gases in the pickling tank is installed on the lower side of the second baffle plate; the gas in the pickling tank is sucked by the exhaust assembly.
[0007] In addition, it is particularly preferred that the drive assembly includes a first drive member and a second drive member; the first drive member is fixedly connected to the fixed frame; the telescopic end of the first drive member is fixedly connected to the first baffle; the second drive member is fixedly connected to the fixed frame; the telescopic end of the second drive member is fixedly connected to the second baffle.
[0008] In addition, it is particularly preferred that the exhaust assembly includes a limit plate, a pressure plate and a first air pipe; a plurality of limit plates for protecting the first filter are fixedly connected to the lower side of the second baffle; each limit plate is in contact with the adjacent first filter; a pressure plate is slidably connected to each limit plate through a spring; cavities are provided inside the limit plates and the pressure plates; an air supply cavity is formed between each limit plate and the adjacent pressure plate; a plurality of exhaust holes are provided on each pressure plate near the adjacent first filter side; each exhaust hole is connected to the adjacent air supply cavity; a first air supply pipe is connected to the air supply cavity of each limit plate; each first air supply pipe passes through the second baffle; and all first air supply pipes are connected to an external air supply device.
[0009] Furthermore, it is particularly preferred that a plurality of drainage holes are provided on the lower side of each pressing plate.
[0010] In addition, it is particularly preferred that it also includes an air blowing component; the air blowing component includes a one-way valve, a second filter screen and a second air supply pipe; a connecting cavity is opened on the lower side of the bottom plate; a plurality of air supply holes are opened on the upper side of the bottom plate, and all the air supply holes are connected to the connecting cavity; an air supply channel is opened in one of the support rods on the bottom plate; the air supply channel is connected to the connecting cavity; a one-way valve for blowing air into the pickling tank is installed in each air supply hole; a second filter screen is fixedly connected in each air supply hole to prevent quartz sand from entering the air supply hole, and each second filter screen is located on the upper side of the adjacent one-way valve; a second air supply pipe is installed in one of the fixed plates on the fixed frame; the second air supply pipe corresponds to the upper and lower positions of the air supply channel, and the second air supply pipe is connected to the air supply channel by plugging; the one-way valve and the second filter screen are both made of polytetrafluoroethylene.
[0011] In addition, it is particularly preferred that an auxiliary scraping system is also included, which includes a slide rail, an electric slider and a scraper; a plurality of mounting grooves are opened on the lower side of the first baffle; each mounting groove is fixedly connected to a slide rail; each slide rail is slidably connected to two left-right symmetrical electric sliders; a scraper for scraping quartz sand flat is commonly fixed to the two electric sliders on the left; and a scraper is also commonly fixed to the two electric sliders on the right.
[0012] In addition, it is particularly preferred that each scraper is provided with two inclined surfaces, and the two inclined surfaces are arranged in a V shape; when the two scrapers move toward each other, the V-shaped inclined surfaces guide the quartz sand on the front and rear sides to converge toward the middle.
[0013] In addition, it is particularly preferred that a limiting groove is provided at the connection between each support rod and the first filter screen, and each first filter screen slides in the corresponding limiting groove; and protruding blocks are provided on the opposite sides of the two scrapers.
[0014] In addition, it is particularly preferred that the auxiliary scraping system also includes a third baffle and a motor; a plurality of third baffles are rotatably connected to the first baffle for preventing quartz sand from entering the mounting groove; each third baffle is located on an adjacent mounting groove; the third baffle is located between two scrapers; two motors are fixedly connected to the first baffle; and each motor output shaft is fixedly connected to the rotating shaft of an adjacent third baffle.
[0015] Compared with the prior art, the present invention has the following advantages: During pickling, the temporary sealing plate common between the first baffle plate, the second baffle plate, the fixed frame and the support rod is covered on the upper side of the pickling tank, thereby preventing the toxic gas generated during the pickling process from diffusing to the outside and ensuring that the health of the staff is not affected by the harmful gas. After the pickling is completed, the quartz sand is subjected to a filter press operation through the first baffle plate to make the residual acid solution flow back into the pickling tank, thereby reducing the residual acid solution in the quartz sand, thereby reducing the time required for subsequent deacidification, improving the purification efficiency of the quartz sand, reducing the waste of the acid solution, and reducing the cost of purification; The bottom of the first filter screen is supported by the limit plate, thereby reducing the tension of the first filter screen due to the extrusion of the quartz sand, avoiding damage to the first filter screen, and increasing the service life of the first filter screen; By controlling the first baffle to filter the flat quartz sand, the quartz sand is subjected to uniform force around and in the middle, ensuring that the quartz sand in the middle is fully squeezed, thereby improving the filter pressing effect of the quartz sand; While the first filter is moving upward, the airflow blown out through the air suction hole blows away the quartz sand remaining inside the first filter, thereby eliminating the need for subsequent manual cleaning of the quartz sand remaining inside the first filter and improving the cleaning efficiency of the quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the pickling equipment for purifying vein quartz and preparing high-purity quartz sand according to the present invention; Figure 2 It is a state diagram of quartz sand pickling of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the bottom plate, support rod and first filter assembly of the present invention; Figure 4 A diagram showing the separation state of the bottom plate and the first filter screen of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 It is a schematic diagram of a three-dimensional structure of a combination of a fixing frame, a first baffle and a second baffle of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the second baffle, the limiting plate and the pressing plate combination of the present invention; Fig. 9 It is a combined cross-sectional view of the limit plate and the pressure plate of the present invention; Fig.10 It is a schematic diagram of the combined three-dimensional structure of the first baffle and the auxiliary scraping system of the present invention; Fig.11 For the present invention Fig.10Enlarged view of point C in the middle; Fig.12 The three-dimensional structure of the scraper of the present invention is shown in FIG. Fig.13 This is a diagram showing the rotation state of the third baffle of the present invention.
[0017] In the figure: 1-bottom plate, 1001-connecting cavity, 1002-gas delivery hole, 2-support rod, 2001-first through hole, 2002-gas delivery channel, 2003-limiting groove, 3-first filter, 3001-fixing frame, 4-fixing frame, 4001-fixing plate, 4002-pin, 4003-second through hole, 5-first baffle, 5001-installation groove, 6-second baffle, 7-limiting plate, 7001-gas delivery Air cavity, 8-pressing plate, 8001-exhaust hole, 8002-drainage hole, 9-first air pipe, 10-pickling tank, 201-first driving member, 202-second driving member, 203-one-way valve, 204-second filter, 205-second air pipe, 301-slide rail, 302-electric slider, 303-scraper, 30301-inclined surface, 30302-protruding block, 304-third baffle, 305-motor. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.
[0019] Example 1 A method for purifying vein quartz to prepare high-purity quartz sand comprises the following steps: S1: Place the vein quartz ore into a pit-type resistance furnace and keep it at 950℃ for 1h. Take out the roasted sample and quickly pour it into room temperature water for water quenching for 10min. Then dry the sample at 90℃. S2: crush the water-quenched raw ore with a double-roll crusher and sieve to obtain samples of different particle sizes; S3: Take 800g of 60-160 mesh sample and put it into a 3L flotation tank, add water to 2.5L, add 5mL HF, adjust the pH value to 2-3, and then add dodecylamine to the flotation tank to a concentration of 2×10 -4 mol / L, reverse flotation is carried out under acidic conditions, the floating samples are impurity phases such as feldspar and mica, and the quartz phase remains at the bottom of the flotation tank; S4: The enriched quartz phase sample obtained by flotation is pickled with mixed acid, wherein the concentration of hydrofluoric acid is 0.5 mol / L, the concentration of oxalic acid is 0.1 mol / L, and 2 g of ammonium bifluoride is added. The pickling conditions are: the solid-liquid weight ratio of the quartz sample to the mixed acid is 1:5, pickling is carried out at normal pressure at 100°C for 8 hours, and quartz concentrate is obtained.
[0020] A sufficient amount of quartz sample was prepared according to the above method and pickled using the following equipment: A pickling device for purifying vein quartz to prepare high-purity quartz sand, used for pickling quartz sand in S4 of the above method, referring to Figure 1-Figure 9 As shown, it includes a bottom plate 1 and support rods 2; four support rods 2 are fixedly connected to the bottom plate 1; the bottom plate 1 is located in the pickling tank 10; It also includes a first filter screen 3, a fixing frame 4, a driving assembly, a first baffle plate 5, a second baffle plate 6 and an exhaust assembly; a first filter screen 3 is installed between every two support rods 2 on the same side; the first filter screen 3 is woven with polytetrafluoroethylene material; a fixing frame 3001 is fixedly connected to the upper side of all the first filter screens 3, and the fixing frame 3001 is a rectangular frame structure; a fixing frame 4 is arranged on the upper side of the support rod 2; four fixing plates 4001 arranged in a rectangular shape are fixedly connected to the lower side of the fixing frame 4; the distribution spacing of the fixing plates 4001 is consistent with the distribution spacing of the support rods 2; each fixing plate 4001 is plugged with a pin 4002; each support rod 2 is provided with a first through hole 2001; each fixing plate 4 A second through hole 4003 corresponding to the diameter of the pin 4002 is provided on 001; the diameter of each first through hole 2001 corresponds to the diameter of the adjacent pin 4002; a driving assembly is installed on the fixing frame 4; the driving assembly is connected to the first baffle 5; the first baffle 5 is rectangular in shape, and the outer contour of the first baffle 5 is consistent with the inner contour of the fixing frame 3001; the driving assembly is connected to the second baffle 6; the second baffle 6 is a rectangular frame structure, and the inner contour of the second baffle 6 is consistent with the outer contour of the fixing frame 3001; the first baffle 5 and the second baffle 6 are driven up and down by the driving assembly; an exhaust assembly is installed on the lower side of the second baffle 6; the gas in the pickling tank 10 is sucked by the exhaust assembly.
[0021] The driving assembly includes a first driving member 201 and a second driving member 202; the first driving member 201 is fixedly connected to the middle of the fixed frame 4, and the first driving member 201 is an electric push rod; the telescopic end of the first driving member 201 is fixedly connected to the first baffle 5; the second driving member 202 is fixedly connected to the right side of the fixed frame 4, and the second driving member 202 is an electric push rod; the telescopic end of the second driving member 202 is fixedly connected to the second baffle 6.
[0022] The air extraction component includes a limit plate 7, a pressure plate 8 and a first air supply pipe 9; four limit plates 7 arranged in a rectangular shape are fixedly connected to the lower side of the second baffle plate 6; each limit plate 7 is fitted with the adjacent first filter screen 3; each limit plate 7 is slidably connected with a pressure plate 8 through a spring; cavities are provided inside the limit plates 7 and the pressure plates 8; an air supply cavity 7001 is formed between each limit plate 7 and the adjacent pressure plate 8; each pressure plate 8 is provided with a plurality of air extraction holes 8001 near the side of the adjacent first filter screen 3; each air extraction hole 8001 is connected with the adjacent air supply cavity 7001; the air supply cavity 7001 of each limit plate 7 is connected with a first air supply pipe 9; each first air supply pipe 9 passes through the second baffle plate 6; all first air supply pipes 9 are connected with an external air supply device.
[0023] Furthermore, in order to facilitate the reflux of the filtered acid solution into the pickling tank 10 , a plurality of drainage holes 8002 are provided on the lower side of each pressing plate 8 .
[0024] It also includes a blowing assembly; the blowing assembly includes a one-way valve 203, a second filter screen 204 and a second air delivery pipe 205; a connecting cavity 1001 is opened on the lower side of the bottom plate 1; a plurality of air delivery holes 1002 are opened on the upper side of the bottom plate 1, and all the air delivery holes 1002 are connected to the connecting cavity 1001; a gas delivery channel 2002 is opened in one of the support rods 2 on the bottom plate 1; the gas delivery channel 2002 is connected to the connecting cavity 1001; a one-way valve is installed in each air delivery hole 1002 Door 203; a second filter screen 204 is fixedly connected in each gas delivery hole 1002, and each second filter screen 204 is located on the upper side of the adjacent one-way valve 203; a second gas pipe 205 is installed in one of the fixed plates 4001 on the fixed frame 4; the second gas pipe 205 corresponds to the upper and lower positions of the gas delivery channel 2002, and the second gas pipe 205 is connected to the gas delivery channel 2002 by plugging; the one-way valve 203 and the second filter screen 204 are both made of polytetrafluoroethylene material.
[0025] The fixed frame 4 is installed on the mobile crane on the top of the pickling workshop, and the mobile crane drives the fixed frame 4 to move up and down and forward and backward, and the bottom plate 1 is located at the bottom of the pickling tank 10, and the lower surface of the fixed frame 3001 is flush with the upper surface of the pickling tank 10. Before pickling, the quartz sand is transported to the bottom plate 1 by an external loader, and then an acid solution is injected into the pickling tank 10, so that the acid solution covers the quartz sand, and the liquid level is lower than the lowest side of the pressing plate 8. The impurities on the surface and inside of the quartz sand are decomposed by the acid solution to improve the purity of the quartz sand, thereby realizing the pickling of the quartz sand. In this process, the first filter screen 3 is a key component. Because it is woven with polytetrafluoroethylene material, it has good acid resistance and corrosion resistance, and can withstand long-term immersion in the acid solution without damage. When the pickling is completed, the fixed frame 4 and its connecting parts are driven by the mobile crane to move to the top of the pickling tank 10, and the fixed plate 4 is 001, the latch 4002 is removed, and then the mobile crane is controlled to drive the fixing frame 4 to move downward, so that the second through hole 4003 on each fixing plate 4001 is aligned with the first through hole 2001 on the corresponding support rod 2, and then the latch 4002 is inserted into the second through hole 4003 and the first through hole 2001, so that the support rod 2 and the fixing frame 4 are connected as a whole through the latch 4002, and then the mobile crane is controlled to drive the fixing frame 4 to move upward, thereby synchronously driving the support rod 2 and its connecting parts to move upward, so that the bottom plate 1 supporting the quartz sand moves upward until it is separated from the acid solution in the pickling tank 10. During this process, the acid solution above the bottom plate 1 flows back into the pickling tank 10 through the first filter screen 3, and at the same time, the quartz sand on the bottom plate 1 is intercepted by the first filter screen 3 to prevent the quartz sand from separating from the bottom plate 1 during the lifting process, thereby ensuring that all the quartz sand can be separated from the pickling tank 10 at one time, thereby improving the pickling efficiency.
[0026] In the above pickling process, the acid solution needs to maintain a high temperature to ensure the pickling efficiency of the quartz sand. In this way, the hydrofluoric acid, hydrochloric acid, etc. in the acid solution are easily volatilized and dissipated into the air by heat, which may easily cause damage to the respiratory system of the staff in the long run. On this basis, the size of the quartz sand treated by pickling is usually a small particle size of 60-160 mesh, so the porosity between the quartz sand is high, thereby forming a capillary effect, and the liquid is adsorbed between the pores through the capillary effect. In this way, when the quartz sand is separated from the pickling tank 10, there is still a lot of acid solution remaining in the pores between the quartz sand, resulting in an increase in the content of the residual acid solution in the quartz sand. After the quartz sand is pickled, it needs to be deacidified, that is, the bottom plate 1 and the quartz sand are prevented from being placed in the deacidification tank together, and the acid solution on the upper half of the quartz sand is rinsed with clean water in the deacidification tank. When there is a lot of acid solution on the quartz sand, it is necessary to increase the deacidification time of the quartz sand, thereby reducing the efficiency of quartz sand purification.
[0027] To this end, after the quartz sand is poured into the bottom plate 1, the mobile crane is controlled to move the fixing frame 4 and its parts to the top of the pickling tank 10, and the fixing frame 4 and the support rod 2 are integrated by the latch 4002. Then, the first driving member 201 is controlled to drive the first baffle 5 to move downward, so that the first baffle 5 is inserted into the fixing frame 3001. At this time, the outer contour of the first baffle 5 is matched with the inner contour of the fixing frame 3001. At the same time, the second driving member 202 is controlled to drive the second baffle 6 to move downward on the support rod 2, so that the second baffle 6 is sleeved on the outer side of the fixing frame 3001, and the inner contour of the second baffle 6 is matched with the outer contour of the fixing frame 3001. The contour is fitted, and the second baffle plate 6 covers the upper side of the inner edge of the pickling tank 10. At this time, a temporary sealing plate is formed between the first baffle plate 5, the second baffle plate 6, the fixed frame 3001 and the support rod 2. The temporary sealing plate is covered on the upper side of the pickling tank 10 to block the acid solution in the pickling tank 10 from communicating with the outside air, thereby preventing the toxic gas generated during the pickling process from diffusing to the outside and ensuring that the body of the staff is not affected by the harmful gas. At the same time, the first gas pipe 9 is evacuated through the external gas transmission device, so that the gas in the pickling tank 10 enters the gas transmission cavity 7001 through the suction hole 8001, and then passes The gas is discharged to the external gas delivery device through the first gas delivery pipe 9 to ensure that the gas pressure in the pickling tank 10 remains stable. At the same time, during the gas extraction process, the harmful gas is extracted from the pickling tank 10, and the extracted gas is pumped to the air purification device for purification through the external gas delivery device, thereby avoiding harmful gas pollution of the environment. Further, when the quartz sand is pickled, the quartz sand is separated from the pickling tank 10 by moving the crane. During this process, the temporary sealing plate formed between the support rod 2, the first baffle 5, the second baffle 6, and the fixed frame 3001 is still in the assembled state. At this time, the first driving member 201 is controlled to drive the first baffle 5 Moving downward, the first baffle plate 5 is separated from the fixed frame 3001 until the first baffle plate 5 squeezes the quartz sand on the bottom plate 1, and the quartz sand is pressurized by the first baffle plate 5 to compress the pores between the quartz sand, thereby squeezing out the acid solution remaining in the pores of the quartz sand, and allowing the acid solution to flow back into the pickling tank 10 through the first filter screen 3, thereby achieving a filter press operation on the quartz sand, reducing the acid solution remaining in the quartz sand due to capillary action, thereby reducing the time required for subsequent deacidification and improving the purification efficiency of the quartz sand. In addition, the residual acid solution flows back into the pickling tank 10, reducing the waste of the acid solution and reducing the cost of purification.
[0028] It is also considered that the quartz sand needs to be stirred during the pickling process so that the quartz sand is in full contact with the acid solution. For this reason, in the process of fitting the fixed plate 4001 with the corresponding first through hole 2001, the second air pipe 205 is inserted into the air channel 2002, and then the second air pipe 205 is supplied with air through an external air supply device, so that the air passes through the air channel 2002, the connecting cavity 1001, the one-way valve 203 and the second filter 204 in sequence, and is finally discharged from the air supply hole 1002, so that the air is blown to the quartz sand on the bottom plate 1, and then the quartz sand continues to float in the acid solution, thereby increasing the contact area between the quartz sand and the acid solution and improving the pickling effect. In addition, in the subsequent deacidification process, the external air supply device can also be used to Air is transmitted in the connecting cavity 1001, so that the quartz sand continues to float in the clean water, and the quartz sand is fully in contact with the clean water, thereby improving the cleaning effect and further improving the deacidification efficiency. It is explained here that the second filter screen 204 blocks the quartz sand from entering the air transmission hole 1002 to prevent the quartz sand from blocking the air transmission hole 1002 and the one-way valve 203, and the one-way valve 203 blocks the acid solution or clean water from entering the connecting cavity 1001. At the same time, the one-way valve 203 and the second filter screen 204 are made of the same material as the first filter screen 3 to ensure that the one-way valve 203 and the second filter screen 204 can work for a long time when immersed in the acid solution, and in the process of blowing, the air transmission cavity 7001 is continuously evacuated by an external air transmission device to ensure the air pressure balance in the pickling tank 10.
[0029] Furthermore, since the first filter screen 3 is woven with polytetrafluoroethylene material, the first filter screen 3 is a flexible net. When the first baffle plate 5 performs a filter pressing operation on the quartz sand, the quartz sand at the bottom is squeezed and easily overflows to the side of the first filter screen 3, so that the bottom of the first filter screen 3 is squeezed by the quartz sand and is in a tight state. If the quartz sand is continuously filter pressed, the tension on the first filter screen 3 is likely to be too large, thereby causing damage to the first filter screen 3. For this reason, before performing the filter pressing operation, the second driving member 202 is first controlled to drive the second baffle plate 6, the limit plate 7 and the pressure plate 8 to move downward until the pressure plate 8 contacts the bottom plate 1, and then the second baffle plate 6 and the limit plate 7 are continued to be controlled to move downward, and the spring between the limit plate 7 and the pressure plate 8 is compressed, and at the same time, the air suction hole 8001 on the pressure plate 8 is retracted into the air delivery cavity 7001, thereby blocking the acidic solution from passing through the air suction hole 80 01 enters the air delivery cavity 7001. At this time, the lower end of the limit plate 7 is flush with the lower end of the first filter screen 3, and the limit plate 7 is in contact with the outer side of the first filter screen 3. Then the first baffle plate 5 is controlled to perform filter pressing operation on the quartz sand. At this time, the bottom of the first filter screen 3 is supported by the limit plate 7, thereby reducing the tension of the first filter screen 3 due to the squeezing of the quartz sand, avoiding damage to the first filter screen 3, and improving the service life of the first filter screen 3. On this basis, a drainage hole 8002 is set at the bottom of the pressure plate 8, so that the acid solution remaining in the quartz sand can flow downward along the limit plate 7 to the drainage hole 8002, and then be discharged from the drainage hole 8002 and reflux into the pickling tank 10. It is explained here that the surfaces of the limit plate 7 and the pressure plate 8 are covered with an acid-resistant and corrosion-resistant protective coating, thereby avoiding corrosion of the limit plate 7 and the pressure plate 8 by the acidic solution, and extending the service life of the limit plate 7 and the pressure plate 8.
[0030] Example 2 Based on Example 1, Figure 2 and Figure 10-13 As shown, an auxiliary scraping system is also included, which includes a slide rail 301, an electric slider 302 and a scraper 303; two front-to-back symmetrical mounting grooves 5001 are opened on the lower side of the first baffle 5; each mounting groove 5001 is fixedly connected to a slide rail 301; each slide rail 301 is slidably connected to two left-right symmetrical electric sliders 302; a scraper 303 is fixedly connected to the two electric sliders 302 on the left; and a scraper 303 is also fixedly connected to the two electric sliders 302 on the right.
[0031] Each scraper 303 is provided with two inclined surfaces 30301 , and the two inclined surfaces 30301 are arranged in a V shape; when the two scrapers 303 move toward each other, the V-shaped inclined surfaces 30301 guide the quartz sand on the front and rear sides to converge toward the middle.
[0032] Furthermore, in order to facilitate the detachment of the quartz sand from the base plate 1, a limiting groove 2003 is provided at the connection between each support rod 2 and the first filter screen 3, and each first filter screen 3 slides in the corresponding limiting groove 2003; and protruding blocks 30302 are provided on the opposite sides of the two scrapers 303.
[0033] The auxiliary scraping system also includes a third baffle 304 and a motor 305; two third baffles 304 symmetrically connected to the first baffle 5 are rotatably connected; each third baffle 304 is located on an adjacent mounting groove 5001; the third baffle 304 is located between the two scrapers 303; two motors 305 are fixedly connected to the first baffle 5; the output shaft of each motor 305 is fixedly connected to the rotating shaft of the adjacent third baffle 304.
[0034] During the pickling process, due to the continuous blowing of the quartz sand, the quartz sand is in a suspended state in the acid solution. In the process of the bottom plate 1 driving the quartz sand to separate from the pickling tank 10, the acid solution in the upper range of the bottom plate 1 is discharged from the four first filter screens 3 respectively. In this way, the quartz sand is easily stacked on the inner side of the four first filter screens 3, so that the quartz sand is distributed on the bottom plate 1 in a high surrounding and low middle shape. If the filter press is performed in this state, the quartz sand in the middle of the bottom plate 1 is difficult to be squeezed, which reduces the effect of the filter press. Therefore, before the filter press is performed, the limit plate 7 is first controlled to move downward to the bottom of the first filter screen 3, and then the limit plate 7 is controlled to move downward to the bottom of the first filter screen 3. The first baffle 5 drives the scraper 303 to move downward, so that the two scrapers 303 are respectively inserted into the left edge position and the right edge position of the quartz sand pile, and then the left electric slider 302 and the right electric slider 302 are controlled to move toward each other on the slide rail 301, thereby driving the two scrapers 303 to move toward each other until the scraper 303 moves to the middle of the bottom plate 1, thereby pushing the quartz sand with higher accumulation on the left and right sides of the quartz sand to move toward the middle, and the quartz sand with higher accumulation on the left and right edges is guided to move toward the middle through the V-shaped inclined surface 30301 on the scraper 303. The scraper 303 is moved to the middle of the bottom plate 1, thereby gathering the excess quartz sand to the middle of the bottom plate 1, and then the two scrapers 303 are controlled to move to the left at the same time until the left scraper 303 moves to the leftmost, and then the two scrapers 303 are controlled to move to the right at the same time until the right scraper 303 moves to the rightmost, thereby scraping the excess quartz sand in the middle of the bottom plate 1 to the left and right sides, and then the first driving member 201 is controlled to move the scraper 303 upward to separate from the quartz sand, and the scraper 303 is restored to the initial position, and then the first baffle 5 is controlled to filter the flat quartz sand, so that the force on the surrounding and middle parts of the quartz sand is uniform, ensuring that the quartz sand in the middle is fully be squeezed, thereby improving the quartz sand filtration effect. Similarly, after the quartz sand is deacidified, there is a lot of moisture remaining between the quartz sand, which affects the subsequent drying efficiency. Therefore, the quartz sand can be filtered again through the first baffle 5, so as to squeeze out the moisture in the gaps of the quartz sand and reduce the water content of the quartz sand, thereby improving the subsequent drying efficiency. It is explained here that the thickness of the quartz sand on the bottom plate 1 is greater than the vertical thickness of the scraper 303. Therefore, when the first baffle 5 filters the quartz sand, there is a gap between the lowermost side of the scraper 303 and the bottom plate 1, ensuring that the scraper 303 will not affect the filtration operation of the first baffle 5.
[0035] It is also considered that when the first baffle plate 5 squeezes the quartz sand, the mounting groove 5001 is in an open state, so that during the filtration process, the quartz sand is easy to enter the mounting groove 5001 and adhere to the slide rail 301 and the electric slider 302, thereby affecting the normal movement of the electric slider 302. For this reason, by adding a third baffle plate 304 at the mounting groove 5001, before the two scrapers 303 move toward each other, the two motors 305 are controlled to drive the third baffle plate 304 to rotate. With the view from right to left as the reference, the front side of the third baffle plate 304 is The three baffles 304 rotate 90 degrees clockwise, and the third baffle 304 on the rear side rotates 90 degrees counterclockwise, so that the installation slot 5001 is opened, which facilitates the normal movement of the electric slider 302 and the scraper 303. When the first baffle 5 performs a filter pressing operation, the two scrapers 303 return to their initial positions, and the motor 305 is controlled to drive the third baffle 304 to reset and cover the installation slot 5001. The third baffle 304 blocks quartz sand from entering the installation slot 5001, thereby ensuring the normal movement of the electric slider 302.
[0036] On this basis, when the pickling process and the deacidification process are completed, the quartz sand on the bottom plate 1 needs to be taken out and then transferred to the drying device for subsequent drying process. To this end, the bottom plate 1 is first placed on the ground by a mobile crane, and the first driving member 201 is controlled to drive the first baffle 5 to move to fit with the fixed frame 3001. At this time, the scraper 303 is located below the fixed frame 3001, and then the two scrapers 303 are controlled to move back to back, so that the protruding block 30302 moves to protrude from the outer contour of the first baffle 5, and then the first baffle 5 drives the scraper 303 to move upward, so that the protruding block 30302 fits with the lower edge of the fixed frame 3001, and then the scraper 303 continues to move upward, thereby driving the fixed frame 3001 and the first filter 3 to move upward in the limiting groove 2003 through the protruding block 30302, so that the first filter 3 is separated from the bottom plate 1. At the same time, the first filter screen 3 is separated from the quartz sand, so that it is convenient for an external machine (such as a loader) to transfer the quartz sand on the bottom plate 1 for subsequent drying operations. During this process, part of the quartz sand still remains on the first filter screen 3, and manual assistance is required to clean the remaining quartz sand. To this end, before the first filter screen 3 moves upward, the second driving member 202 is first controlled to move the limit plate 7 to the initial position, and then air is blown into the air delivery cavity 7001 through the external air supply device, so that air is blown from the air extraction hole 8001 to the first filter screen 3, and then the air flow passes through the gap in the first filter screen 3 and enters the inner side of the first filter screen 3. When the first filter screen 3 moves upward, the air flow blown out through the air extraction hole 8001 blows away the quartz sand remaining on the inner side of the first filter screen 3, thereby eliminating the need for subsequent manual cleaning of the quartz sand remaining on the inner side of the first filter screen 3, thereby improving the cleaning efficiency of the quartz sand.
[0037] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.
Claims
1. A method for purifying vein quartz to prepare high-purity quartz sand, characterized in that: The steps include: S1, roasting and water quenching the massive vein quartz ore; S2, crushing and screening the raw ore after water quenching; S3, selecting raw ore samples that meet the target particle size requirements, and performing flotation treatment to obtain flotation concentrate and flotation tailings; S4. The concentrate obtained by flotation is subjected to acid washing to obtain quartz concentrate.
2. A pickling device for purifying vein quartz to prepare high-purity quartz sand, used for pickling quartz sand in S4 of claim 1, comprising a bottom plate (1); four support rods (2) are fixedly connected to the bottom plate (1); the bottom plate (1) is located in a pickling tank (10); wherein: A first filter screen (3) for intercepting quartz sand is installed between every two support rods (2) on the same side; the first filter screen (3) is woven from polytetrafluoroethylene material; a fixing frame (3001) is fixedly connected to the upper side of all the first filter screens (3), and the fixing frame (3001) is a rectangular frame structure; a fixing frame (4) is arranged on the upper side of the support rod (2); four fixing plates (4001) arranged in a rectangular shape are fixedly connected to the lower side of the fixing frame (4); the distribution spacing of the fixing plates (4001) is consistent with the distribution spacing of the support rods (2); a plug (4002) is plugged into each fixing plate (4001); each support rod (2) is provided with a first through hole (2001); each fixing plate (4001) is provided with a second through hole (4002) corresponding to the diameter of the plug (4002); 3); the diameter of each first through hole (2001) corresponds to the diameter of the adjacent pin (4002); a driving assembly is mounted on the fixing frame (4); a first baffle (5) for filtering quartz sand is connected to the driving assembly; the first baffle (5) is rectangular in shape, and the outer contour of the first baffle (5) is consistent with the inner contour of the fixing frame (3001); a second baffle (6) is connected to the driving assembly; the second baffle (6) is a rectangular frame structure, and the inner contour of the second baffle (6) is consistent with the outer contour of the fixing frame (3001); the first baffle (5) and the second baffle (6) are driven to move up and down by the driving assembly; an exhaust assembly for extracting toxic gas in the pickling tank (10) is mounted on the lower side of the second baffle (6); the gas in the pickling tank (10) is sucked by the exhaust assembly.
3. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 2, characterized in that: The driving assembly comprises a first driving member (201); the first driving member (201) is fixedly connected to the fixing frame (4); the telescopic end of the first driving member (201) is fixedly connected to the first baffle (5); the second driving member (202) is fixedly connected to the fixing frame (4); the telescopic end of the second driving member (202) is fixedly connected to the second baffle (6).
4. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 2, characterized in that: The air extraction component comprises a limit plate (7); a plurality of limit plates (7) for protecting the first filter screen (3) are fixedly connected to the lower side of the second baffle plate (6); each limit plate (7) is in contact with the adjacent first filter screen (3); each limit plate (7) is slidably connected to a pressing plate (8) via a spring; a cavity is provided inside the limit plate (7) and the pressing plate (8); an air delivery cavity (7001) is formed between each limit plate (7) and the adjacent pressing plate (8); each pressing plate (8) is provided with a plurality of air extraction holes (8001) on the side close to the adjacent first filter screen (3); each air extraction hole (8001) is connected to the adjacent air delivery cavity (7001); the air delivery cavity (7001) of each limit plate (7) is connected to a first air delivery pipe (9); each first air delivery pipe (9) passes through the second baffle plate (6); and all the first air delivery pipes (9) are connected to an external air delivery device.
5. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 4, characterized in that: A plurality of drainage holes (8002) are provided on the lower side of each pressing plate (8).
6. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 3, characterized in that: The invention also comprises an air blowing assembly; the air blowing assembly comprises a one-way valve (203); a connecting cavity (1001) is provided on the lower side of the bottom plate (1); a plurality of air supply holes (1002) are provided on the upper side of the bottom plate (1), and all the air supply holes (1002) are connected to the connecting cavity (1001); an air supply channel (2002) is provided in one of the support rods (2) on the bottom plate (1); the air supply channel (2002) is connected to the connecting cavity (1001); each air supply hole (1002) is provided with a one-way valve (203) for blowing air into the pickling tank (10); each air supply hole (1002) is provided with a one-way valve (203) for blowing air into the pickling tank (10); A second filter screen (204) is fixedly connected in each of the holes (1002) to prevent quartz sand from entering the gas transmission hole (1002), and each second filter screen (204) is located on the upper side of an adjacent one-way valve (203); a second gas transmission pipe (205) is installed in one of the fixed plates (4001) on the fixed frame (4); the second gas transmission pipe (205) corresponds to the gas transmission channel (2002) in upper and lower positions, and the second gas transmission pipe (205) is connected to the gas transmission channel (2002) by plugging; the one-way valve (203) and the second filter screen (204) are both made of polytetrafluoroethylene material.
7. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 3, characterized in that: The auxiliary scraping system includes a slide rail (301); a plurality of mounting grooves (5001) are provided on the lower side of the first baffle plate (5); each mounting groove (5001) is fixedly connected to a slide rail (301); each slide rail (301) is slidably connected to two left-right symmetrical electric sliders (302); a scraper (303) for scraping quartz sand is fixedly connected to the two left electric sliders (302); and a scraper (303) is also fixedly connected to the two right electric sliders (302).
8. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 7, characterized in that: Each scraper (303) is provided with two inclined surfaces (30301), and the two inclined surfaces (30301) are arranged in a V shape; when the two scrapers (303) move towards each other, the V-shaped inclined surfaces (30301) guide the quartz sand on the front and rear sides to converge towards the middle.
9. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 8, characterized in that: A limiting groove (2003) is provided at the connection between each support rod (2) and the first filter screen (3), and each first filter screen (3) slides in the corresponding limiting groove (2003); and protruding blocks (30302) are provided on opposite sides of the two scrapers (303).
10. A pickling device for purifying vein quartz to prepare high-purity quartz sand according to claim 9, characterized in that: The auxiliary scraping system further comprises a third baffle (304); a plurality of third baffles (304) for preventing quartz sand from entering the installation groove (5001) are rotatably connected to the first baffle (5); each third baffle (304) is located on an adjacent installation groove (5001); the third baffle (304) is located between two scrapers (303); two motors (305) are fixedly connected to the first baffle (5); and the output shaft of each motor (305) is fixedly connected to the rotation shaft of an adjacent third baffle (304).