CN117138917A - Production process of high-purity quartz sand for photovoltaic crucible - Google Patents
Production process of high-purity quartz sand for photovoltaic crucible Download PDFInfo
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- CN117138917A CN117138917A CN202311112823.9A CN202311112823A CN117138917A CN 117138917 A CN117138917 A CN 117138917A CN 202311112823 A CN202311112823 A CN 202311112823A CN 117138917 A CN117138917 A CN 117138917A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 227
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000004576 sand Substances 0.000 claims abstract description 160
- 238000000034 method Methods 0.000 claims abstract description 53
- 238000007885 magnetic separation Methods 0.000 claims abstract description 50
- 238000007599 discharging Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000010453 quartz Substances 0.000 claims abstract description 23
- 238000005406 washing Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims description 28
- 230000003068 static effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 239000006148 magnetic separator Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000005291 magnetic effect Effects 0.000 description 21
- 239000000696 magnetic material Substances 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 238000007790 scraping Methods 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 229910017855 NH 4 F Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
Abstract
The invention discloses a production process of high-purity quartz sand for a photovoltaic crucible, which comprises the following process steps: the quartz ore is prepared by coarse crushing, fine crushing, sand making, sand washing, drying and magnetic separation in sequence; an inclined material guiding and discharging plate is arranged at a discharging hole of crushing equipment related to the coarse crushing and/or fine crushing working procedure, and a sand outlet for collecting fine materials reaching sand granularity after coarse crushing and/or fine crushing is arranged on the material guiding and discharging plate. The invention also carries out magnetic separation during part of sand making work, reduces the workload of follow-up magnetic separation, reduces the workload of final magnetic separation equipment, reduces the working hours required by magnetic separation procedures, and integrally improves the production efficiency of the production process. The finer materials which are crushed by the jaw crusher and the cone crusher and reach the sand granularity are collected firstly, so that the sand output of the whole production process is increased, waste is avoided, partial sand making work is performed in the crushing process, the working efficiency is improved, and the sand output is increased.
Description
Technical Field
The invention relates to chemical components of glass and enamel glaze, in particular to a production process of high-purity quartz sand for a photovoltaic crucible.
Background
The photovoltaic quartz crucible is an important consumable material in the production of silicon wafers, and has important influence on the yield and quality of the silicon wafers. The quartz crucible is a vessel for containing high-temperature silicon melt in the single crystal furnace, and one quartz crucible needs to be replaced every time a silicon rod of the single crystal furnace is pulled, so that the quartz crucible is an important consumable for manufacturing single crystal silicon wafers by the Czochralski method. The quartz crucible has a double-layer structure: the inner layer is in direct contact with the silicon solution, the quality of the inner layer affects the yield and quality of the final silicon wafer, the requirement on the purity of raw materials is high, and imported quartz sand is generally adopted; the outer layer is mainly used for heat dissipation, and generally adopts domestic quartz sand. The quartz crucible has high purity quartz sand on the upstream and wide downstream application fields, mainly uses semiconductors and photovoltaics, and has a rapid increase in the demand of the photovoltaic market. The photovoltaic crucible is an important guarantee for the quality of the silicon wafer and is a key consumable material in the silicon wafer processing link. A36 inch crucible consumes 100 kg of quartz sand, and has a service life of about 400 hours, and 2 crucibles are used for each month in a furnace. The purity of the raw material, temperature resistance, durability, etc. of the quartz crucible are important factors affecting the quality of single crystals. In the process of crystal pulling, the contents of hydroxyl groups, impurity elements and bubbles in the quartz crucible affect the quality of a silicon rod and the service life of the quartz crucible, wherein the process route can improve the content of the hydroxyl groups, but the content of the impurities and the bubbles depends more on the purity of quartz sand per se. The adoption of high-purity quartz sand is critical to the performance of the quartz crucible, and the natural quartz sand has excessive impurity content and can influence the growth of crystals.
Zhang Jin in the paper "process test research for preparing ultra-high purity quartz sand by using high-quality vein quartz" published in non-metallic mineral "2023, 3 rd month, 46 nd period, the vein quartz properties are researched by using an inductively coupled plasma emission spectrometer (ICP-OES), a microscopic cooling and heating table, a polarizing microscope, an X-ray powder diffraction (XRD) instrument and the like, and a quartz sand purification scheme of" water quenching-ball milling sand making-flotation-acid leaching "is formulated. The Al content of the main impurity element is reduced to 6.40 multiplied by 10 -6 Obtaining Al, fe, K, na, ca, mg, ti, li, ZThe total amount of 9 impurities such as r is less than 13 multiplied by 10 -6 Is a high-purity quartz sand. But it combines collector and regulator NH 4 F、H 2 SO 4 、HCl-NH 4 The use of chemical agents such as Cl composite agents is too much, on one hand, the environment is not protected enough, the subsequent agent liquid needs to be treated, and on the other hand, the use of the agents is too much, so that the production cost of the production process is increased. Cheng Shangxu in the paper "analysis research of process flow of high-purity quartz sand" published in the 28 th (general 271 th) of 2013 of China high enterprise technical enterprises, it is mentioned that silica is adopted to prepare high-purity quartz sand through raw ore sorting, roasting, water quenching, crushing, magnetic separation, acid leaching, floatation, baking and other processes, data acquisition is respectively carried out on each process section, and through analysis data, beneficial discussion is carried out, so that relevant conclusion is obtained, and guarantee is provided for optimizing process flow and improving product quality of production enterprises. And the roasting consumes more energy, and the acid leaching uses chemical agents. At present, the production process for sequentially passing the quartz ore through a jaw crusher, a cone crusher, a sand making machine and a sand washing machine is also available, the energy consumption is relatively low, the environment is protected, but the sand output is low, and the production efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a high-purity quartz sand production process for a photovoltaic crucible, which is characterized in that finer materials which reach the sand granularity and are crushed by a jaw crusher and a cone crusher are collected firstly, so that the sand yield of the whole production process is increased, the waste is avoided, partial sand production work is performed in the crushing process, the working efficiency is improved, and the sand yield is increased.
In order to achieve the above purpose, the technical scheme of the invention is to design a production process of high-purity quartz sand for a photovoltaic crucible, which comprises the following process steps: the quartz ore is prepared by coarse crushing, fine crushing, sand making, sand washing, drying and magnetic separation in sequence; an inclined material guiding and discharging plate is arranged at a discharging hole of crushing equipment related to the coarse crushing and/or fine crushing working procedure, and a sand outlet for collecting fine materials reaching sand granularity after coarse crushing and/or fine crushing is arranged on the material guiding and discharging plate. Because sand with smaller granularity and even reaching the final mesh number (particle size) can be generated in the crushing process in the coarse crushing and fine crushing processes, a sand outlet for collecting the fine materials reaching the sand granularity after the coarse crushing and fine crushing is arranged at the discharge port of the crushing equipment related to the coarse crushing and fine crushing processes, so that the sand output of the whole production process is increased, waste is avoided, partial sand making work is performed in the crushing process, the working efficiency is improved, and the sand output is increased.
Further, a conveying step of conveying the material after the sand production to the sand washing step is provided between the sand production step and the sand washing step, and a magnetic separation step is provided in the conveying step. When in transportation, partial magnetic separation work is carried out, the follow-up magnetic separation workload is reduced, the working hours of the magnetic separation procedure can be reduced, and the production efficiency of the production process is improved.
The further technical proposal is that quartz ore is processed into ore grains with coarse sand granularity after coarse crushing, and the grain size of the ore grains is more than 4mm; finely crushing and then processing into ore particles with fine sand granularity, wherein the particle size of the ore particles is 2-4 mm; the granularity of the quartz sand prepared by sand making is 4-70 or 70-120 meshes; the water consumption of the sand washing process is 30-40 t/h, and the sand washing operation is carried out with the yield of 15-300 tons; the temperature during drying is 200-450 ℃, and the drying time is 6-12 h.
The further technical scheme is that a filter screen is fixedly arranged at the sand outlet, and the mesh number of the filter screen is matched with the granularity of the required quartz sand. After the setting, because the mesh number of the filter screen is matched with the granularity of the required quartz sand, the aperture of the holes on the filter screen is much smaller than that of ore particles, the ore particles cannot be discharged from the sand outlet, and the sand outlet is ensured to be used for sand discharge.
The method comprises the following steps of carrying out coarse crushing operation on quartz ores by using a jaw crusher in a coarse crushing process, carrying out fine crushing operation on coarse crushed ore particles by using a cone crusher in a fine crushing process, carrying out sand making operation on fine crushed materials by using an impact sand making machine in a sand making process, using a wheel type sand washer in a sand washing process, using a quartz sand drying roller system in a drying process, and using a magnetic separator in a magnetic separation process.
The jaw crusher comprises a machine body arranged on a foundation, a gear motor arranged on one side of the machine body, an output shaft of the gear motor is connected with a belt pulley transmission mechanism, an eccentric shaft is fixedly arranged on a belt pulley shaft of one belt pulley of the belt pulley transmission mechanism, the eccentric shaft is connected with a movable jaw plate, and a stationary jaw plate matched with the movable jaw plate is fixedly arranged on one inner side wall of the machine body;
the lower ends of the movable jaw plate and the static jaw plate are respectively fixedly connected with a guide discharging plate which is obliquely arranged with the movable jaw plate and the static jaw plate, the two guide discharging plates are arranged in parallel, a plurality of sand outlets are arranged on the guide discharging plates, and the heights of the sand outlets are all positioned above the openings formed at the bottommost ends of the two guide discharging plates. The finer materials which are crushed by the jaw crusher and the cone crusher and reach the sand granularity are collected firstly, so that the sand yield of the whole production process is increased, waste is avoided, partial sand making work is performed in the crushing process, the working efficiency is improved, and the sand yield is increased. Only the lower guide discharging plate is provided with a sand outlet so as to facilitate sand discharge. The two guide discharging plates are arranged in parallel, so that the distance between the pair of guide discharging plates keeps the size of the ore discharge opening, namely ore particles conforming to the size can be discharged from the opening at the lower end of the guide discharging plates which are arranged in parallel, and the size requirement of the original ore discharge opening on the ore particles is continued.
Further technical scheme is, the lower extreme both sides fixedly connected with vertical magnetic separation board that sets up of play sand mouth on the slope guide discharge plate, sets up magnetic separation part on the magnetic separation board. The magnetic separation plate fixed connection of vertical setting has still carried out the magnetic separation at partial sand making during operation on the lower face of slope guide discharge plate, lightens follow-up magnetic separation work load, reduces the work load of final magnetic separation equipment, reduces the required man-hour of magnetic separation process, has improved production efficiency of production technology on the whole. The magnetic separation component can be a permanent magnetic plate, and because only partial magnetic separation is performed, the magnetic separation component has low requirement and can remove certain magnetic materials, so that the permanent magnetic plate is adopted, the cost is low, and the preparation is easy.
According to the technical scheme, the port at the lowest end of the two guide discharging plates is fixedly provided with an inclined filter screen, the inclined filter screen is obliquely arranged relative to a horizontal plane, the inclined direction of the inclined filter screen is the length direction of the rotating axis of the relative eccentric shaft, the length direction of the rotating axis of the inclined filter screen is gradually higher or gradually lower from left to right, the lowest end of the inclined filter screen is used as a new ore discharge port, and a sand discharge collecting hopper is arranged below the filter screen. The inclined filter screen is arranged, the mesh number of the inclined filter screen is matched with the granularity required by sand making, so that large-grain-size ore grains cannot be discharged from holes on the inclined filter screen and can only be discharged from a new ore discharge port, and small-grain-size sand is discharged from holes on the inclined filter screen, so that the effects of partial sand making and sand collecting during crushing are realized.
The invention has the advantages and beneficial effects that: because sand with smaller granularity and even reaching the final mesh number (particle size) can be generated in the crushing process in the coarse crushing and fine crushing processes, a sand outlet for collecting the fine materials reaching the sand granularity after the coarse crushing and fine crushing is arranged at the discharge port of the crushing equipment related to the coarse crushing and fine crushing processes, so that the sand output of the whole production process is increased, waste is avoided, partial sand making work is performed in the crushing process, the working efficiency is improved, and the sand output is increased.
When in transportation, partial magnetic separation work is carried out, the follow-up magnetic separation workload is reduced, the working hours of the magnetic separation procedure can be reduced, and the production efficiency of the production process is improved.
Because the mesh number of the filter screen is matched with the granularity of the required quartz sand, the aperture of the holes on the filter screen is much smaller than that of ore particles, the ore particles cannot be discharged from the sand outlet, and the sand outlet is ensured to be used for sand outlet.
The finer materials which are crushed by the jaw crusher and the cone crusher and reach the sand granularity are collected firstly, so that the sand yield of the whole production process is increased, waste is avoided, partial sand making work is performed in the crushing process, the working efficiency is improved, and the sand yield is increased.
Only the lower guide discharging plate is provided with a sand outlet so as to facilitate sand discharge. The two guide discharging plates are arranged in parallel, so that the distance between the pair of guide discharging plates keeps the size of the ore discharge opening, namely ore particles conforming to the size can be discharged from the opening at the lower end of the guide discharging plates which are arranged in parallel, and the size requirement of the original ore discharge opening on the ore particles is continued.
The magnetic separation component can be a permanent magnetic plate, and because only partial magnetic separation is performed, the magnetic separation component has low requirement and can remove certain magnetic materials, so that the permanent magnetic plate is adopted, the cost is low, and the preparation is easy.
The inclined filter screen is arranged, the mesh number of the inclined filter screen is matched with the granularity required by sand making, so that large-grain-size ore grains cannot be discharged from holes on the inclined filter screen and can only be discharged from a new ore discharge port, and small-grain-size sand is discharged from holes on the inclined filter screen, so that the effects of partial sand making and sand collecting during crushing are realized.
Drawings
FIG. 1 is a schematic diagram of a production line involved in a process for producing high-purity quartz sand for a photovoltaic crucible;
FIG. 2 is an enlarged schematic view of the jaw crusher and the portion of the sand out collection hopper below the jaw crusher of FIG. 1;
FIG. 3 is an enlarged partial schematic view of the portion of the dashed rectangular box in FIG. 2;
FIG. 4 is a schematic perspective view of the jaw crusher of FIG. 2;
FIG. 5 is a left side view of the stationary jaw plate, leftmost guide and discharge plate, permanent magnet magnetic plate and sand discharge collection hopper of FIG. 2 removed;
FIG. 6 is an alternative inclined screen arrangement to that of FIG. 5;
FIG. 7 is a schematic perspective view of the cone crusher of FIG. 1;
FIG. 8 is a longitudinal cross-sectional view of FIG. 7;
FIG. 9 is a schematic perspective view of the impact sand making machine of FIG. 1;
FIG. 10 is a cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 11 is a schematic view of the link plate conveyor of FIG. 1 from another perspective with the support feet removed;
FIG. 12 is an enlarged schematic view of the link plate portion of FIG. 11;
FIG. 13 is a side view of FIG. 2 taken perpendicular to the direction of the stripper plate;
fig. 14 is a schematic view of a jaw crusher in a second embodiment of the invention;
FIG. 15 is an enlarged schematic view of the permanent magnet magnetic plate of FIG. 14 with the lever mechanism therebelow;
fig. 16 is a side view of fig. 15.
In the figure: 1. a material guiding and discharging plate; 2. a sand outlet; 3. a filter screen; 4. a speed reducing motor; 5. a belt wheel transmission mechanism; 6. an eccentric shaft; 7. a movable jaw plate; 8. a static jaw plate; 9. the original ore discharge port; 10. a new ore discharge port; 11. a sand discharge collecting hopper; 12. a permanent magnetic plate; 13. tilting the filter screen; 14. a side sealing plate; 15. an impact sand making machine; 16. wheel type sand washer; 17. magnetic separation parts; 18. a link plate conveying mechanism; 19. jaw crusher; 20. a link plate; 21. a through hole; 22. a drying device; 23. a material guiding and discharging cavity; 24. widening the cavity; 25. a lever; 26. balancing weight; 27. a base; 28. a connecting plate; 29. a scraping ring.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Embodiment one:
as shown in fig. 1 to 13 (for convenience of illustration, fig. 1 shows a side plate of a body of a jaw crusher, fig. 2 does not show an inclined filter screen and a widening cavity; the invention) the invention relates to a production process of high-purity quartz sand for a photovoltaic crucible, which comprises the following process steps: the quartz ore is prepared by coarse crushing, fine crushing, sand making, sand washing, drying and magnetic separation in sequence; a tilting material guiding and discharging plate 1 is arranged at a discharging hole of crushing equipment related to the coarse crushing and fine crushing procedures, and a sand outlet 2 for collecting fine materials reaching sand granularity after coarse crushing or fine crushing is arranged on the material guiding and discharging plate 1.
A conveying process for conveying the sand-made material to the sand washing process is arranged between the sand making process and the sand washing process, and a magnetic separation process is arranged in the conveying process.
Coarse crushing quartz ore and processing into ore grains with coarse sand granularity, wherein the grain size of the ore grains is larger than 4mm; finely crushing and then processing into ore particles with fine sand granularity, wherein the particle size of the ore particles is 2-4 mm; the granularity of the quartz sand prepared by sand making is 4-70 or 70-120 meshes; the water consumption of the sand washing process is 30-40 t/h, and the sand washing operation is carried out with the yield of 15-300 tons; the temperature during drying is 200-450 ℃, and the drying time is 6-12 h.
The sand outlet 2 is fixedly provided with a filter screen 3, and the number of the filter screen 3 meshes is matched with the granularity of the required quartz sand.
The jaw crusher 19 is used for coarse crushing operation of quartz ore, the cone crusher is used for fine crushing operation of coarse crushed ore, the impact sand making machine 15 is used for sand making operation of fine crushed material, the wheel sand washer is used for sand washing operation, the quartz sand drying roller system (quartz sand drying roller) is used for drying operation, and the magnetic separator is used for magnetic separation operation.
The jaw crusher 19 comprises a machine body arranged on a foundation, a speed reducing motor 4 arranged on one side of the machine body, an output shaft of the speed reducing motor 4 is connected with a belt pulley transmission mechanism 5, an eccentric shaft 6 is fixedly arranged on a belt pulley shaft of one belt pulley of the belt pulley transmission mechanism 5, the eccentric shaft 6 is connected with a movable jaw plate 7, and a static jaw plate 8 matched with the movable jaw plate 7 is fixedly arranged on an inner side wall of the machine body; setting jaw breaker 19, the broken discharge gate of cone breaker into slope guide flitch 1, set up sand outlet 2 (sand outlet 2 can also set up filter screen 3, the granularity looks adaptation of 3 mesh numbers of filter screen and required quartz sand) on the slope guide flitch 1, will be through the broken finer material that reaches the sand granularity of jaw breaker 19, cone breaker collect earlier, increase the play sand volume of whole production technology, avoid extravagant (broken in-process has carried out the work of partial system sand, improve work efficiency, increase play sand volume).
The movable jaw plate 7 and the static jaw plate 8 at the original ore discharge port are fixedly connected with the guide discharge plates 1 obliquely arranged with the movable jaw plate 7 and the static jaw plate 8 respectively, the two guide discharge plates 1 are arranged in parallel (the distance between the two guide discharge plates 1 keeps the size of the ore discharge port, namely ore particles conforming to the size can be discharged from the port of the lower end of the parallel guide discharge plate 1, the size requirement of the original ore discharge port 9 on the ore particles is continued), a plurality of sand outlets 2 are arranged on the guide discharge plate 1, the sand outlets 2 are all positioned above the ports of the bottommost ends of the two guide discharge plates 1 in height, a filter screen 3 is fixedly arranged at the sand outlets 2, the mesh number of the filter screen 3 is matched with the granularity of the required quartz sand, the bottommost ends of the two guide discharge plates 1 are fixedly provided with an inclined filter screen 13, the bottommost ends of the inclined filter screen 13 serve as new ore discharge ports 10 (although the sand outlets are arranged, the sand outlets can be further arranged at the positions of the bottommost ends of the two guide discharge plates 1, and the particle size of the sand can be further arranged at the small filter screen 13 in a small size, and the sand can be further arranged at the position of the small filter screen 13, and the small particle size can be further arranged at the position of the material hopper, and the sand hopper is arranged at the small particle size, and the particle size can be further arranged at the position, and the particle size is the material hopper, and the material hopper is the small.
Magnetic separation components are arranged on two sides of the lower end of the sand outlet 2 on the inclined guide discharge plate 1 (magnetic separation is performed during part of sand making work, so that the follow-up magnetic separation workload is reduced, the workload of final magnetic separation equipment is reduced, the working hours required by magnetic separation procedures are reduced, and the production efficiency of the production process is integrally improved). The magnetic separation component is a vertically arranged permanent magnetic plate 12 fixedly connected with two sides of the lower end of the sand outlet 2 on the inclined guide discharging plate 1.
The impact sand making machine 15 is used for making sand and then is conveyed to a sand washer (the sand washer combines a wheel type sand washer 16 and a spiral sand washer for washing sand in sequence), and magnetic separation parts 17 are arranged on two sides of conveying equipment in the conveying process, so that the follow-up magnetic separation workload is reduced, and partial magnetic separation work is carried out during conveying.
Ore is obliquely upwards conveyed to a jaw crusher 19 through a link plate conveying mechanism 18, flushing is carried out in the conveying process, low-weight mud is flushed out, ore is continuously conveyed, and a link plate 20 on the link plate conveying mechanism 18 is provided with a through hole 21 with the aperture smaller than the average size of the ore;
the drying device 22 is higher than the wheel type sand washer 16 in height, so that part of water on the sand surface of the sand washed by the wheel type sand washer 16 is removed when the sand is conveyed upwards, and the energy consumption of the drying device 22 is reduced.
Two sides of the two material guiding and discharging plates 1 are fixedly connected with side sealing plates 14 to form a material guiding and discharging cavity 23; the lowest end of the inclined filter screen 13 is provided with a certain distance from the nearest side sealing plate 14 to serve as a new ore discharge port 10; the inclined filter screen 13 is provided with two inclined filter screens 13, the highest positions of the two inclined filter screens 13 are fixedly connected, the connection positions of the two filter screens are positioned at the middle positions of the widths of the two guide discharge plates 1 (the width direction of the guide discharge plates 1 is parallel to the direction of the rotation axis of the eccentric shaft 6 or the belt wheel shaft), the left side end face and the right side end face (namely the side sealing plates 14) of the lowest ends of the two guide discharge plates 1 are respectively fixedly connected with a widening cavity 24 in a rectangular shell shape, the opening of the widening cavity 24 faces downwards (towards the ground in the vertical direction), the widening cavity 24 is communicated with the guide discharge cavity 23 (the widening cavity 24{ comprises the arrangement of the opening of the widening cavity downwards } for widening the new discharge hole 10), the roof of the widening cavity 24 is equal to the height of the new discharge hole 10 (namely the roof of the widening cavity 24 is consistent with the height of the lowest end of the inclined filter screen 13 because the widening cavity 24 is smaller than the original discharge hole, the widening cavity 24 is communicated with the side plate 24 } because the height of the widening cavity 24 is slightly smaller than the original discharge hole, and the widening cavity 24 is communicated with the height of the side plate 24 because the widening cavity is slightly smaller than the height of the guide cavity 24.
Embodiment two:
the difference from the first embodiment is that, as shown in fig. 14 to 16, the sand outlet 2 on the inclined guiding and discharging plate 1 is provided with one magnetic separation component, the magnetic separation component is a permanent magnetic plate 12 vertically arranged at two sides of the lower end of the sand outlet 2, the permanent magnetic plate 12 is positioned below the inclined guiding and discharging plate 1, the permanent magnetic plate 12 is fixedly connected to one end of a lever 25 of a lever mechanism, a balancing weight 26 for keeping the balance of the lever is fixedly connected to the other end of the lever 25, one side of the lever mechanism, far away from the permanent magnetic plate 12, is provided with a base 27, a connecting plate 28 is hinged with the base 27, a scraping ring 29 for scraping the magnetic material adsorbed on the surface of the permanent magnetic plate 12 is fixedly connected to the top end of the connecting plate 28, so when the thinner material falls down through the sand outlet 2, the vertically arranged permanent magnetic plate 12 below the sand outlet 2 adsorbs the magnetic materials in the fine materials, the balance of the lever mechanism is destroyed after the magnetic materials are adsorbed to a certain amount, the scraping ring 29 moves upwards along the bottom of the permanent magnetic plate 12 on one hand, so as to scrape off the magnetic materials adsorbed on the middle-lower section surface of the permanent magnetic plate 12 (or roll down to the middle-lower section surface after being adsorbed on the middle-upper section surface of the permanent magnetic plate 12) (of course, the scraping ring is made of non-ferromagnetic materials), and when the magnetic materials on the surface of the permanent magnetic plate 12 are reduced, the lever mechanism gradually returns to the original balance state, so that the magnetic materials are automatically removed when the surface of the permanent magnetic plate 12 adsorbs more magnetic materials, and the permanent magnetic plate 12 continues to adsorb the magnetic materials after the scraping ring is removed; the effect of automatically removing the magnetic materials on the surface of the permanent magnetic plate 12 is realized through simple arrangement, the energy consumption is low, and a driving mechanism is not needed.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. The production process of the high-purity quartz sand for the photovoltaic crucible is characterized by comprising the following process steps of: the quartz ore is prepared by coarse crushing, fine crushing, sand making, sand washing, drying and magnetic separation in sequence; an inclined material guiding and discharging plate is arranged at a discharging hole of crushing equipment related to the coarse crushing and/or fine crushing working procedure, and a sand outlet for collecting fine materials reaching sand granularity after coarse crushing and/or fine crushing is arranged on the material guiding and discharging plate.
2. The process for producing high purity silica sand for a photovoltaic crucible according to claim 1, wherein a conveying step for conveying the material after the sand production to a sand washing step is provided between the sand production step and the sand washing step, and a magnetic separation step is provided in the conveying step.
3. The process for producing high-purity quartz sand for a photovoltaic crucible according to claim 2, wherein quartz ore is coarsely crushed and then processed into ore grains with coarse sand granularity, and the ore grain size is larger than 4mm; finely crushing and then processing into ore particles with fine sand granularity, wherein the particle size of the ore particles is 2-4 mm; the granularity of the quartz sand prepared by sand making is 4-70 or 70-120 meshes; the water consumption of the sand washing process is 30-40 t/h, and the sand washing operation is carried out with the yield of 15-300 tons; the temperature during drying is 200-450 ℃, and the drying time is 6-12 h.
4. The process for producing high-purity quartz sand for photovoltaic crucibles according to claim 3, wherein a filter screen is fixedly arranged at the sand outlet, and the mesh number of the filter screen is matched with the granularity of the required quartz sand.
5. The process according to claim 1 or 4, wherein the coarse crushing step uses a jaw crusher to perform coarse crushing operation on quartz ore, the fine crushing step uses a cone crusher to perform fine crushing operation on coarse crushed ore particles, the sand making step uses an impact sand making machine to perform sand making operation on finely crushed materials, the sand washing step uses a wheel type sand washer, the drying step uses a quartz sand drying roller system, and the magnetic separation step uses a magnetic separator.
6. The process for producing high-purity quartz sand for a photovoltaic crucible according to claim 5, wherein the jaw crusher comprises a machine body arranged on a foundation, a gear motor arranged on one side of the machine body, an output shaft of the gear motor is connected with a belt pulley transmission mechanism, an eccentric shaft is fixedly arranged on a belt pulley shaft of one belt pulley of the belt pulley transmission mechanism, the eccentric shaft is connected with a movable jaw plate, and a static jaw plate matched with the movable jaw plate is fixedly arranged on an inner side wall of the machine body;
the lower ends of the movable jaw plate and the static jaw plate are respectively fixedly connected with a guide discharging plate which is obliquely arranged with the movable jaw plate and the static jaw plate, the two guide discharging plates are arranged in parallel, a plurality of sand outlets are arranged on the guide discharging plates, and the heights of the sand outlets are all positioned above the openings formed at the bottommost ends of the two guide discharging plates.
7. The process for producing high-purity quartz sand for a photovoltaic crucible according to claim 6, wherein magnetic separation plates which are vertically arranged are fixedly connected to two sides of the lower end of a sand outlet on the inclined guide discharging plate, and magnetic separation components are arranged on the magnetic separation plates.
8. The process for producing high-purity quartz sand for photovoltaic crucibles according to claim 7, wherein the openings at the lowest ends of the two material guiding and discharging plates are fixedly provided with inclined filter screens, the inclined filter screens are arranged obliquely relative to a horizontal plane, the inclined direction of the inclined filter screens is the length direction of the rotating axis of the eccentric shaft from left to right to be higher or lower, the lowest end of the inclined filter screens is used as a new ore discharging opening, and a sand collecting hopper is arranged below the filter screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311112823.9A CN117138917B (en) | 2023-08-31 | Production process of high-purity quartz sand for photovoltaic crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311112823.9A CN117138917B (en) | 2023-08-31 | Production process of high-purity quartz sand for photovoltaic crucible |
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| CN117138917B CN117138917B (en) | 2024-05-03 |
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| JP2003010725A (en) * | 2001-06-29 | 2003-01-14 | Kotobuki Giken Kogyo Kk | Apparatus and method for manufacturing sand |
| KR20110061758A (en) * | 2009-12-02 | 2011-06-10 | 주식회사 한미이엔씨 | Apparatus for producing sand by dry type |
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