CN112142056A - Quartz sand purification method and purification system based on purification method - Google Patents
Quartz sand purification method and purification system based on purification method Download PDFInfo
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- CN112142056A CN112142056A CN202011016250.6A CN202011016250A CN112142056A CN 112142056 A CN112142056 A CN 112142056A CN 202011016250 A CN202011016250 A CN 202011016250A CN 112142056 A CN112142056 A CN 112142056A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000746 purification Methods 0.000 title claims abstract description 52
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005554 pickling Methods 0.000 claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000001914 filtration Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 28
- 238000001354 calcination Methods 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000008213 purified water Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 239000008234 soft water Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 35
- 238000003860 storage Methods 0.000 claims description 27
- 239000002351 wastewater Substances 0.000 claims description 25
- 238000011084 recovery Methods 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 12
- 230000018044 dehydration Effects 0.000 claims description 10
- 238000006297 dehydration reaction Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 7
- 239000008187 granular material Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000011403 purification operation Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229910003110 Mg K Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004063 acid-resistant material Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
Abstract
A quartz sand purification method comprises the following steps: 1) the pickling solution is injected into a pickling tank for heating; 2) quartz sand is put into the pickling tank; 3) introducing compressed air; 4) standing; introducing soft water into the pickling tank until the pH value of the discharged waste liquid is neutral; 5) purified water is input into a main box body of the ultrasonic cleaning equipment; 6) inputting the materials into ultrasonic cleaning equipment; 7) cleaning the materials and then putting the cleaned materials into a collecting barrel; 8) conveying the slurry to a second filtering and dehydrating device; 9) starting drying and calcining equipment to heat; 10) drying and calcining the materials; 11) the material enters a cooling aggregate bin; 12) and (5) carrying out material inspection. The purification system comprises a pickling tank, ultrasonic cleaning equipment, drying and calcining equipment and a cooling aggregate bin. By adopting the method and the system structure, the defects in the purification process of inorganic powder granular materials such as the conventional quartz sand and the like can be overcome, the purification process of the inorganic powder granular materials is optimized, the purification operation quality is improved, and the impurity content in finished products is reduced.
Description
Technical Field
The invention relates to the field of purification processes of inorganic powder particle materials, in particular to a quartz sand purification method and a purification system based on the purification method.
Background
In the purification process of inorganic powder materials such as quartz sand with high purity requirement, the inorganic powder materials are generally subjected to the processes of acid washing, water washing, dehydration, drying and the like. At present, the acid washing of powder materials generally adopts stirring or soaking and other modes, the stirring effect on the materials with larger specific gravity and coarser granularity is poor, and meanwhile, the stirrer and the tank wall are abraded; since the soaking is static, the soaking time is long and the dissolution effect on impurities is poor.
The powder particles are usually cleaned by a stirring sedimentation method and a simple washing mode, and the cleaning mode has large water consumption and can not thoroughly remove trace impurities attached to the surfaces and cracks of the particles.
Most of the materials with higher requirements such as high-purity quartz sand and the like are dried and heat-treated by a quartz tube type rotary furnace, but the materials are straight-through type, granular materials, particularly fine powder materials, slide gradually from a high end to a low end along with the rotation of a hearth and cannot be well dispersed, the materials are heated unevenly, the mass transfer is slow, the heat efficiency is low, and the energy consumption is high. Therefore, the drying and heat treatment effects are not ideal, the product quality stability is poor, and the performance index is low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a quartz sand purification method and a purification system based on the purification method, which can overcome the defects in the purification process of inorganic powder granular materials such as conventional quartz sand, optimize the purification process of the inorganic powder granular materials, improve the purification operation quality and reduce the impurity content in finished products.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a quartz sand purification method comprises the following steps:
1) injecting the prepared pickling solution into a pickling tank, enabling the liquid level to exceed the heater, starting a first stirrer to stir the pickling solution, and heating the pickling solution through the heater;
2) the quartz sand after being screened is according to mQuartz sand：mPickling solutionPutting the mixture into a pickling tank according to the proportion of 1-3: 1-10;
3) introducing compressed air into the pickling tank through an air inlet pipe to carry out pickling operation on the quartz sand;
4) after the pickling operation is finished, closing the heater and the first stirrer, stopping inputting compressed air, and standing until sand materials are settled;
5) opening a first water discharge pipe to output the upper layer waste liquid to a waste acid tank;
6) closing the first water discharge pipe, introducing soft water into the pickling tank, opening the first stirrer and the air inlet pipe again, and opening the first water discharge pipe at intervals to discharge waste liquid until the PH of the discharged waste liquid is 6.0-7.0;
7) opening a first discharging pipe to enable the materials to be output to first filtering and dehydrating equipment for dehydration, guiding wastewater generated by dehydration to a wastewater recovery tank, and conveying the dehydrated materials to a first storage bin;
8) inputting purified water into a main box body of the ultrasonic cleaning equipment through a water inlet pipe until the liquid level is flush with an overflow pipe;
9) continuously and slowly injecting purified water, starting the conveying crawler belt, the ultrasonic energy emitter and the second stirrer, and starting the first discharging pipe to enable the dehydrated materials to enter ultrasonic cleaning equipment;
10) the materials move along with the conveying crawler belt, are cleaned by the ultrasonic energy emitter and then enter the collecting barrel, coarse materials fall into the bottom of the collecting barrel, and fine materials flow into the waste water recovery tank along with purified water through the overflow pipe;
11) when the height of the sand material sinking into the bottom of the collecting barrel is level with that of the main box body, the feeding hopper stops feeding, the conveying crawler, the water inlet pipe and the ultrasonic energy emitter are closed, the second stirrer continues to stir at a slow speed, and the second water discharge pipe is opened to discharge water;
12) opening a second discharging pipe, conveying the slurry to second filtering and dehydrating equipment for secondary filtering and dehydrating, guiding the wastewater generated by dehydration to a wastewater recovery tank, and conveying the dehydrated material to a second storage bin;
13) starting drying and calcining equipment to enable the hearth pipe to start to rotate slowly and axially, and starting to heat up after the heating temperature, the heating rate and the heat preservation time of each heating section of the heating element are set;
14) the material is output to the drying and calcining equipment from the second storage bin, and the dried and calcined material enters the feeding chute;
15) the material output from the feeding groove enters a cooling aggregate bin, then condensed water is continuously introduced through a condensing pipe, and air extraction operation in the cooling aggregate bin is carried out through an air extraction pipe;
16) and outputting the cooled material through a third discharging pipe, inspecting, metering, packaging and warehousing qualified products, and repeating the steps for secondary purification treatment on unqualified products.
The purification system based on the quartz sand purification method comprises a pickling tank, an ultrasonic cleaning device, a drying and calcining device and a cooling and collecting bin, wherein the bottom of the pickling tank is connected with a first filtering and dehydrating device through a pipeline, the first filtering and dehydrating device is provided with two discharging pipelines which are respectively connected to a wastewater recovery tank and a first storage bin, the bottom of the first storage bin is connected to the input end of the ultrasonic cleaning device through a pipeline, the output end of the ultrasonic cleaning device is connected to a second filtering and dehydrating device through a pipeline, the ultrasonic cleaning device is also provided with an overflow pipeline connected with the wastewater recovery tank, the wastewater recovery tank is also connected with the second filtering and dehydrating device through a pipeline, the second filtering and dehydrating device is connected with a second storage bin through a pipeline, the bottom of the second storage bin is connected to the input end of the drying and calcining device through a pipeline, the output end of the drying and calcining equipment is connected to the cooling aggregate bin through a pipeline.
In the preferred scheme, the pickling tank comprises a pickling tank body, wherein an air inlet pipe extending to the inside of the pickling tank body from the top surface of the pickling tank body is arranged on the pickling tank body, an air splitter ring is arranged on the output end of the air inlet pipe and adopts an annular channel structure, and a plurality of air holes are uniformly distributed on the top surface of the air splitter ring.
In the preferred scheme, the pickling tank body is internally provided with a first stirrer, the outer side wall of the pickling tank body is provided with a heat preservation layer, and the inner side wall of the pickling tank body is provided with a heater.
In the preferred scheme, a first water discharge pipe is arranged on the side wall of the pickling tank body and connected to the waste acid tank;
the bottom of the pickling tank body is provided with a first discharging pipe, and the first discharging pipe is connected to first filtering and dehydrating equipment.
In the preferred scheme, ultrasonic cleaning equipment include the main tank body, main tank body top surface one end is equipped with the feeder hopper, the feeder hopper setting is equipped with the collecting bucket on the main tank body other end under first storage silo bottom output pipeline, the main tank is internal to be equipped with the transport track, be equipped with ultrasonic energy transmitter on the internal top surface of main tank of transport track top.
In a preferred scheme, a water inlet pipe is arranged at one end, close to the feed hopper, of the main box body.
In the preferred scheme, a second stirrer is arranged in the collecting barrel, an overflow pipe and a second water drain pipe are arranged on the side wall of the collecting barrel, the second water drain pipe is arranged below the overflow pipe, a second discharging pipe is arranged at the bottom of the collecting barrel, and the second discharging pipe is connected to second filtering and dehydrating equipment.
In a preferred scheme, the drying and calcining equipment comprises a hearth pipe, at least one partition plate is arranged in the hearth pipe, the partition plate partitions the inside of the hearth pipe into a plurality of compartments, spokes are arranged on the inner wall of the hearth pipe in each compartment, and heating elements are further arranged on the outer wall of the hearth pipe.
In a preferred scheme, the cooling aggregate bin comprises a main bin body, a feeding groove is formed in the top of the main bin body, a condensing pipe is arranged in the main bin body, penetrates through the top surface of the main bin body and penetrates out of the side wall, close to the bottom, of the main bin body after a broken line section is formed in the main bin body;
the top of the main bin body is provided with an exhaust pipe, and the bottom of the main bin body is provided with a third discharging pipe.
According to the quartz sand purification method and the purification system based on the purification method, provided by the invention, by means of optimizing the purification method and the system structure and uniformly introducing compressed air into the pickling tank, the pickling solution is enabled to generate continuous irregular movement, the mixing efficiency between the pickling solution and the materials is improved, and a better pickling effect is achieved; the ultrasonic cleaning is matched with the continuously flowing water flow to carry out overflow to carry out the cleaning of slag materials, so that the cleaning efficiency and the quality of the materials are improved; by improving the structure of the hearth, the materials are spread in the drying and calcining process, so that the materials are dried more quickly; finally, the purpose of improving the product quality and performance index is achieved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the pickling tank of the present invention.
Fig. 3 is a schematic structural view of the gas diverter ring of the present invention.
Fig. 4 is a schematic structural view of the ultrasonic cleaning apparatus of the present invention.
FIG. 5 is a schematic structural diagram of a drying and calcining apparatus according to the present invention.
FIG. 6 is a schematic view of the cross-sectional structure A-A of FIG. 5 according to the present invention.
FIG. 7 is a schematic cross-sectional view of the structure of the section B-B in FIG. 5 according to the present invention.
FIG. 8 is a schematic view of the spoke construction of the present invention.
Fig. 9 is a schematic structural diagram of the cooling aggregate bin of the present invention.
In the figure: the pickling tank 1, the waste acid tank 2, the first filtering and dehydrating device 3, the waste water recycling tank 4, the first storage bin 5, the ultrasonic cleaning device 6, the second filtering and dehydrating device 7, the second storage bin 8, the drying and calcining device 9, the cooling collecting bin 10, the pickling tank body 101, the air inlet pipe 102, the heat-insulating layer 103, the heater 104, the gas distribution ring 105, the first discharging pipe 106, the first discharging pipe 107, the first stirrer 108, the air hole 109, the main tank 601, the conveying crawler 602, the water inlet pipe 603, the feed hopper 604, the ultrasonic energy emitter 605, the second stirrer 606, the collecting tank 607, the overflow pipe 608, the second discharging pipe 609, the second discharging pipe 610, the hearth pipe 901, the spoke 902, the heating element 903, the partition 904, the passage hole 905, the feed tank 1001, the condensing pipe 1002, the air suction pipe 1003 and the third discharging pipe 1004.
Detailed Description
Example 1:
the quartz sand purification method comprises the following steps:
1) injecting the prepared pickling solution into the pickling tank 1, enabling the liquid level to exceed the heater 104, then starting the first stirrer 108 to stir the pickling solution, and heating the pickling solution through the heater 104;
2) the quartz sand after being screened is according to mQuartz sand：mPickling solutionPutting the mixture into a pickling tank 1 in a ratio of 1-3: 1-10;
3) introducing compressed air into the pickling tank 1 through the air inlet pipe 102 to carry out pickling operation on the quartz sand;
4) after the pickling operation is completed, the heater 104 and the first stirrer 108 are turned off, the input of compressed air is stopped, and the mixture is kept stand until the sand material is settled;
5) opening a first water discharge pipe 107 to output the upper layer waste liquid to a waste acid tank 2;
6) closing the first water discharge pipe 107, introducing soft water into the pickling tank 1, opening the first stirrer 108 and the air inlet pipe 102 again, and opening the first water discharge pipe 107 at intervals to discharge waste liquid until the PH of the discharged waste liquid is 6.0-7.0;
7) opening a first discharging pipe 106 to output the materials to a first filtering and dehydrating device 3 for dehydration, guiding wastewater generated by dehydration to a wastewater recovery tank 4, and conveying the dehydrated materials to a first storage bin 5;
8) purified water is input into the main box body 601 of the ultrasonic cleaning equipment 6 through the water inlet pipe 603 until the liquid level is flush with the overflow pipe 608;
9) continuously and slowly injecting purified water, starting the conveying crawler 602, the ultrasonic energy emitter 605 and the second stirrer 606, and starting the first discharging pipe 106 to enable the dehydrated materials to enter the ultrasonic cleaning equipment 6;
10) the materials move along with the conveying crawler 602, and enter the collecting barrel 607 after being cleaned by the ultrasonic energy emitter 605, the coarse materials fall into the bottom of the collecting barrel 607, and the fine materials flow into the waste water recovery tank 4 through the overflow pipe 608 along with the purified water;
11) when the sand material sinking into the bottom of the collecting barrel 607 is level with the main box 601, the feeding hopper 604 stops feeding, the conveying crawler 602, the water inlet pipe 603 and the ultrasonic energy emitter 605 are closed, the second stirrer 606 continues to stir slowly, and the second water discharge pipe 10 is opened to discharge water;
12) opening a second discharging pipe 609, conveying the slurry to a second filtering and dehydrating device 7 for secondary filtering and dehydrating, guiding the wastewater generated by dehydration to a wastewater recovery tank 4, and conveying the dehydrated material to a second storage bin 8;
13) starting the drying and calcining equipment 9 to enable the hearth pipe 901 to start to rotate slowly and axially, and starting to heat up after setting the heating temperature, the heating rate and the heat preservation time of each heating section of the heating element (903);
14) the material is output to the drying and calcining device 9 from the second storage bin 8, and the dried and calcined material enters the feeding chute 1001;
15) the material output from the feed chute 1001 enters the cooling aggregate bin 10, then the condensed water is continuously introduced through the condensation pipe 1002, and meanwhile, the air extraction operation in the cooling aggregate bin 10 is carried out through the air extraction pipe 1003;
16) and outputting the cooled material through a third discharging pipe (1004), inspecting, metering, packaging and warehousing qualified products, and repeating the steps for secondary purification treatment on unqualified products.
Example 2:
the purification system based on the quartz sand purification method of embodiment 1 comprises a pickling tank 1, an ultrasonic cleaning device 6, a drying and calcining device 9 and a cooling and collecting bin 10, wherein the bottom of the pickling tank 1 is connected with a first filtering and dehydrating device 3 through a pipeline, the first filtering and dehydrating device 3 is provided with two discharging pipelines which are respectively connected to a wastewater recovery tank 4 and a first storage bin 5, the bottom of the first storage bin 5 is connected to the input end of the ultrasonic cleaning device 6 through a pipeline, the output end of the ultrasonic cleaning device 6 is connected to a second filtering and dehydrating device 7 through a pipeline, the ultrasonic cleaning device 6 is further provided with an overflow pipeline connected with the wastewater recovery tank 4, the wastewater recovery tank 4 is also connected with the second filtering and dehydrating device 7 through a pipeline, the second filtering and dehydrating device 7 is connected with a second storage bin 8 through a pipeline, the bottom of the second storage bin 8 is connected to the input end of the drying and calcining device 9 through a pipeline, the output end of the drying and calcining device 9 is connected to the cooling aggregate bin 10 through a pipeline.
In a preferred scheme, the pickling tank 1 comprises a pickling tank body 101, an air inlet pipe 102 extending from the top surface of the pickling tank body 101 to the inside of the pickling tank body 101 is arranged on the pickling tank body 101, an air diverter ring 105 is arranged at the output end of the air inlet pipe 102, the air diverter ring 105 adopts an annular channel structure, and a plurality of air holes 109 are uniformly distributed on the top surface of the air diverter ring 105;
in a preferable scheme, a first stirrer 108 is arranged in the pickling tank body 101, a heat-insulating layer 103 is arranged on the outer side wall of the pickling tank body 101, and a heater 104 is arranged on the inner side wall of the pickling tank body 101.
In the preferred scheme, a first water discharge pipe 107 is arranged on the side wall of the pickling tank body 101, and the first water discharge pipe 107 is connected to the waste acid tank 2;
the bottom of the pickling tank body 101 is provided with a first discharging pipe 106, and the first discharging pipe 106 is connected to the first filtering and dehydrating device 3.
In the scheme, the contact part of the pickling tank 1 and the material is coated with polytetrafluoroethylene or other acid-resistant materials.
In a preferred scheme, the ultrasonic cleaning equipment 6 comprises a main box body 601, one end of the top surface of the main box body 601 is provided with a feed hopper 604, the feed hopper 604 is arranged under an output pipeline at the bottom of the first storage bin 5, the other end of the main box body 601 is provided with a collecting bucket 607, a conveying crawler 602 is arranged in the main box body 601, and an ultrasonic energy emitter 605 is arranged on the inner top surface of the main box body 601 above the conveying crawler 602.
In a preferred scheme, a water inlet pipe 603 is arranged at one end of the main box body 601 close to the feed hopper 604.
In a preferable scheme, a second stirrer 606 is arranged in the collecting barrel 607, an overflow pipe 608 and a second water discharge pipe 610 are arranged on the side wall of the collecting barrel 607, the second water discharge pipe 610 is arranged below the overflow pipe 608, a second discharge pipe 609 is arranged at the bottom of the collecting barrel 607, and the second discharge pipe 609 is connected to the second filtering and dehydrating device 7.
In the ultrasonic cleaning equipment 6 in the scheme, the part which is in contact with the materials is made of stainless steel materials or/and polytetrafluoroethylene or/and quartz glass materials.
In a preferred embodiment, the drying and calcining apparatus 9 includes a hearth tube 901, at least one partition 904 is disposed in the hearth tube 901, the partition 904 partitions the inside of the hearth tube 901 into a plurality of compartments, spokes 902 are disposed on the inner wall of the hearth tube 901 in each compartment, and a heating element 903 is further disposed on the outer wall of the hearth tube 901.
In a preferred scheme, the cooling aggregate bin 10 comprises a main bin body, wherein a feeding groove 1001 is formed in the top of the main bin body, a condensing pipe 1002 is arranged in the main bin body, the condensing pipe 1002 penetrates through the top surface of the main bin body, and penetrates out from the side wall, close to the bottom, of the main bin body after a broken line section is formed in the main bin body;
the top of the main bin body is provided with an exhaust tube 1003, and the bottom of the main bin body is provided with a third discharging tube 1004.
In the scheme, the spoke 902 is a quartz glass spoke with sawteeth;
the hearth pipe 901 is in a rotary type and is a hollow high-purity quartz glass pipe, the rotating speed and the angle can be adjusted, and the angle adjusting range is 0-45 degrees;
a temperature-resistant sealing flange can be further installed at two ends of the hearth pipe 901, and the operations of vacuumizing or/and introducing undefined gas, baking, calcining, vacuumizing or adding atmosphere heat treatment and the like are performed on the materials;
the partition 904 is made of quartz glass, a plurality of compartments formed by the partition 904 are sequentially formed by one end of the hearth pipe 901 to the other end of the hearth pipe, and a low-temperature preheating section, a medium-temperature pre-sintering section and a high-temperature calcining section are sequentially formed, and the temperature of each section is adjusted and automatically controlled in an independent adjusting mode.
Example 3:
on the basis of the example 2, the method comprises the following steps of,
adopts industrial-grade concentrated HCL, concentrated HF and H2Adding O into the pickling tank 1 to 70% of the tank body according to the volume ratio of 2:1:7, enabling the liquid level to exceed the top of the heater 104, setting the heating temperature of the heater 104 to be 50 ℃, and keeping the temperature for reaction for 5 hours;
the gas inlet pipe 102 is connected to the pickling tank 101, and then the first stirrer 108 is started and heated;
adding 50-120 mesh quartz sand which is about half of the acid liquor in mass and has no obvious impurity points after pretreatment;
carrying out quartz sand pickling operation according to the scheme provided by the embodiment 1;
wherein, the hearth pipe 901 is divided by two clapboards 904 to form three compartments, which are three chambers of a chamber I, a chamber II and a chamber III and three heating sections:
the chamber I is a preheating section and is set to be 500 ℃;
the chamber II is a medium-temperature section, and the set temperature is 800 ℃;
the III chamber is a high-temperature section, and the set temperature is 1100 ℃;
and continuously feeding and discharging.
The quality of the quartz sand before and after the treatment by the process method is as shown in the following table.
Unit: ug/g
| Item | Al | Fe | Ca | Mg | K | Na | ∑ |
| Before treatment | 168.5 | 26.0 | 31.4 | 12.6 | 14.7 | 36.9 | 290.1 |
| After treatment | 42.1 | 0.84 | 1.3 | 0.55 | 4.32 | 3.23 | 52.3 |
Example 4:
on the basis of the example 2, the method comprises the following steps of,
adopts industrial grade concentrated HCl and concentrated HNO3Concentrated HF and H2Adding O into the pickling tank 1 to 70% of the tank body according to the volume ratio of 1.5:1:0.5:7, enabling the liquid level to exceed the top of the heater 104, setting the heating temperature of the heater 104 to be 70 ℃, and keeping the temperature for reaction for 12 hours;
the gas inlet pipe 102 is connected to the pickling tank 101, and then the first stirrer 108 is started and heated;
adding 80-150 mesh quartz sand which is pretreated and has no obvious impurity point and has about one third of the mass of the acid liquor;
carrying out quartz sand pickling operation according to the scheme provided by the embodiment 1;
wherein, the hearth pipe 901 is separated by a partition plate 904 to form two compartments, i.e. two chambers of I chamber and II chamber and two heating sections:
the chamber I is a preheating section and is set to be 500 ℃;
the chamber II is a high-temperature section, and the set temperature is 1150 ℃;
and continuously feeding and discharging.
The quality of the quartz sand before and after the treatment by the process method is as shown in the following table.
Unit: ug/g
Example 5:
on the basis of the example 2, the method comprises the following steps of,
adopts industrial grade concentrated HCl and concentrated HNO3Concentrated HF and H2Adding O into the pickling tank 1 to 70% of the tank body according to the volume ratio of 2:1:1:6, enabling the liquid level to exceed the top of the heater 104, setting the heating temperature of the heater 104 to be 70 ℃, and keeping the temperature for reaction for 8 hours;
the gas inlet pipe 102 is connected to the pickling tank 101, and then the first stirrer 108 is started and heated;
adding 100-180 mesh quartz sand which is about one third of the acid liquor in mass and has no obvious impurity points after pretreatment;
carrying out quartz sand pickling operation according to the scheme provided by the embodiment 1;
wherein, the hearth pipe 901 is divided by two clapboards 904 to form three compartments, which are three chambers of a chamber I, a chamber II and a chamber III and three heating sections:
the chamber I is a preheating section and is set to be 500 ℃;
the II chamber is a medium-temperature section, and the set temperature is 750 ℃;
the chamber III is a high-temperature section, and the set temperature is 1050 ℃;
intermittent feeding and discharging;
the quality of the quartz sand before and after the treatment by the process method is as shown in the following table.
Unit: ug/g
The intermittent feeding and discharging mode in the embodiment is specifically as follows: two ends of the hearth pipe 901 are provided with detachable temperature-resistant sealing flanges, and the flanges are provided with ventilating and air-extracting pipes, and the operation method is as follows:
firstly, introducing a damp material into a chamber I, exhausting air from one end of the chamber I to exhaust air in a hearth completely, then gradually raising the temperature to a preheating temperature of 400 ℃ under the rotation condition, and meanwhile, continuing to exhaust air for 2-5 min and then stopping exhausting air;
then, the temperature of the chamber II and the chamber III is raised to a set temperature, the hearth is adjusted to be horizontal after all the materials enter the chamber III, and chlorine or mixed gas of the chlorine and hydrogen chloride is introduced for 5min to react for 180 min;
closing the air inlet valve and exhausting again, and introducing the tail gas into a strong alkali aqueous solution for absorption;
then, adjusting the angle of the hearth and opening a sealing cover at the tail end of the hearth, allowing sand to flow into the cooling aggregate bin under the rotation condition, and simultaneously opening an air suction pump and a condensate water valve in the aggregate bin.
Claims (10)
1. A quartz sand purification method is characterized by comprising the following steps:
1) injecting the prepared pickling solution into a pickling tank (1) to enable the liquid level to exceed a heater (104), starting a first stirrer (108) to stir the pickling solution, and heating the pickling solution through the heater (104) at the same time;
2) the quartz sand after being screened is according to mQuartz sand：mPickling solutionPutting the powder in a pickling tank (1) in a ratio of 1-3: 1-10;
3) compressed air is introduced into the pickling tank (1) through the air inlet pipe (102) to carry out pickling operation of quartz sand;
4) after the pickling operation is finished, the heater (104) and the first stirrer (108) are closed, the input of compressed air is stopped, and the mixture is kept stand until sand materials are settled;
5) opening a first water discharge pipe (107) to output the upper-layer waste liquid to a waste acid tank (2);
6) closing the first water discharge pipe (107), introducing soft water into the pickling tank (1), opening the first stirrer (108) and the air inlet pipe (102) again, and opening the first water discharge pipe (107) at intervals to discharge waste liquid until the PH of the discharged waste liquid is 6.0-7.0;
7) opening a first discharging pipe (106) to enable the materials to be output to a first filtering and dehydrating device (3) for dehydration, guiding wastewater generated by dehydration to a wastewater recovery tank (4), and conveying the dehydrated materials to a first storage bin (5);
8) purified water is input into a main box body (601) of the ultrasonic cleaning equipment (6) through a water inlet pipe (603) until the liquid level is flush with an overflow pipe (608);
9) continuously and slowly injecting purified water, starting a conveying crawler belt (602), an ultrasonic energy emitter (605) and a second stirrer (606), and starting a first discharging pipe (106) to enable the dehydrated materials to enter ultrasonic cleaning equipment (6);
10) the materials move along with the conveying crawler (602), are cleaned by the ultrasonic energy emitter (605) and then enter the collecting barrel (607), coarse materials fall into the bottom of the collecting barrel (607), and fine materials flow into the wastewater recovery tank (4) along with purified water through the overflow pipe (608);
11) when the sand material sinking into the bottom of the collecting barrel (607) is level to the main box body (601), the feeding hopper (604) stops feeding, the conveying crawler (602), the water inlet pipe (603) and the ultrasonic energy emitter (605) are closed, the second stirrer (606) continues to stir at slow speed, and the second water discharge pipe (10) is opened to discharge water;
12) opening a second discharging pipe (609), conveying the slurry to a second filtering and dehydrating device (7) for secondary filtering and dehydrating, guiding the wastewater generated by dehydration to a wastewater recovery tank (4), and conveying the dehydrated material to a second storage bin (8);
13) starting drying and calcining equipment (9) to enable the hearth pipe (901) to start to rotate slowly and axially, and starting to heat up after setting the heating temperature, the heating rate and the heat preservation time of each heating section of the heating element (903);
14) the material is output to a drying and calcining device (9) from a second storage bin (8), and the dried and calcined material enters a feeding chute (1001);
15) the material output from the feeding groove (1001) enters a cooling aggregate bin (10), then condensed water is continuously introduced through a condensing pipe (1002), and air extraction operation in the cooling aggregate bin (10) is carried out through an air extraction pipe (1003);
16) and outputting the cooled material through a third discharging pipe (1004), inspecting, metering, packaging and warehousing qualified products, and repeating the steps for secondary purification treatment on unqualified products.
2. A purification system based on the quartz sand purification method of claim 1, characterized in that: comprises a pickling tank (1), an ultrasonic cleaning device (6), a drying and calcining device (9) and a cooling material collecting bin (10), wherein the bottom of the pickling tank (1) is connected with a first filtering and dehydrating device (3) through a pipeline, the first filtering and dehydrating device (3) is provided with two discharging pipelines which are respectively connected to a wastewater recovery tank (4) and a first material storage bin (5), the bottom of the first material storage bin (5) is connected to the input end of the ultrasonic cleaning device (6) through a pipeline, the output end of the ultrasonic cleaning device (6) is connected to a second filtering and dehydrating device (7) through a pipeline, the ultrasonic cleaning device (6) is also provided with an overflow pipeline connected with the wastewater recovery tank (4), the wastewater recovery tank (4) is also connected with the second filtering and dehydrating device (7) through a pipeline, the second filtering and dehydrating device (7) is connected with a second material storage bin (8) through a pipeline, the bottom of the second storage bin (8) is connected to the input end of the drying and calcining device (9) through a pipeline, and the output end of the drying and calcining device (9) is connected to the cooling aggregate bin (10) through a pipeline.
3. The purification system based on the quartz sand purification method according to claim 2, wherein: the pickling tank (1) including the pickling jar body (101), be equipped with one on the pickling jar body (101) and extend to the pickling jar intake pipe (102) in the body (101) by the pickling jar body (101) top surface, be equipped with gas splitter ring (105) on the output of intake pipe (102), gas splitter ring (105) adopt the annular passage structure, the equipartition is equipped with a plurality of gas pockets (109) on the top surface of gas splitter ring (105).
4. The purification system based on the quartz sand purification method according to claim 3, wherein: the pickling tank body (101) is internally provided with a first stirrer (108), the outer side wall of the pickling tank body (101) is provided with a heat insulation layer (103), and the inner side wall of the pickling tank body (101) is provided with a heater (104).
5. The purification system based on the quartz sand purification method according to claim 3, wherein: a first water discharge pipe (107) is arranged on the side wall of the pickling tank body (101), and the first water discharge pipe (107) is connected to the waste acid tank (2);
a first discharging pipe (106) is arranged at the bottom of the pickling tank body (101), and the first discharging pipe (106) is connected to the first filtering and dehydrating device (3).
6. The purification system based on the quartz sand purification method according to claim 2, wherein: ultrasonic cleaning equipment (6) include main tank body (601), main tank body (601) top surface one end is equipped with feeder hopper (604), feeder hopper (604) set up under first storage silo (5) bottom output pipeline, be equipped with on the main tank body (601) other end and collect storage bucket (607), be equipped with in main tank body (601) and carry track (602), be equipped with ultrasonic energy transmitter (605) on the interior top surface of main tank body (601) of carrying track (602) top.
7. The purification system based on the quartz sand purification method as claimed in claim 6, wherein: a water inlet pipe (603) is arranged at one end of the main box body (601) close to the feed hopper (604).
8. The purification system based on the quartz sand purification method as claimed in claim 6, wherein: the material collecting barrel (607) is internally provided with a second stirrer (606), the side wall of the material collecting barrel (607) is provided with an overflow pipe (608) and a second water discharge pipe (610), the second water discharge pipe (610) is arranged below the overflow pipe (608), the bottom of the material collecting barrel (607) is provided with a second material discharge pipe (609), and the second material discharge pipe (609) is connected to second filtering and dehydrating equipment (7).
9. The purification system based on the quartz sand purification method according to claim 2, wherein: the drying and calcining equipment (9) comprises a hearth pipe (901), at least one partition plate (904) is arranged in the hearth pipe (901), the partition plate (904) partitions the interior of the hearth pipe (901) to form a plurality of compartments, spokes (902) are arranged on the inner wall of the hearth pipe (901) in each compartment, and heating elements (903) are further arranged on the outer wall of the hearth pipe (901).
10. The purification system based on the quartz sand purification method according to claim 2, wherein: the cooling aggregate bin (10) comprises a main bin body, wherein a feeding groove (1001) is formed in the top of the main bin body, a condensing pipe (1002) is arranged in the main bin body, the condensing pipe (1002) penetrates through the top surface of the main bin body, and penetrates out from the side wall, close to the bottom, of the main bin body after a broken line section is formed in the main bin body;
the top of the main bin body is provided with an exhaust pipe (1003), and the bottom of the main bin body is provided with a third discharging pipe (1004).
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| CN115382835A (en) * | 2022-08-19 | 2022-11-25 | 陕西合兴硅砂有限公司 | Integrated device and method for producing quartz sand for photovoltaic glass |
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