CN114570504A - Purification device of metallic silicon and use method thereof - Google Patents
Purification device of metallic silicon and use method thereof Download PDFInfo
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- CN114570504A CN114570504A CN202210350033.3A CN202210350033A CN114570504A CN 114570504 A CN114570504 A CN 114570504A CN 202210350033 A CN202210350033 A CN 202210350033A CN 114570504 A CN114570504 A CN 114570504A
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- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 89
- 239000010703 silicon Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000746 purification Methods 0.000 title claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000002893 slag Substances 0.000 claims abstract description 72
- 239000012535 impurity Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 71
- 239000002253 acid Substances 0.000 claims description 70
- 239000000843 powder Substances 0.000 claims description 42
- 239000011863 silicon-based powder Substances 0.000 claims description 24
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 239000000377 silicon dioxide Substances 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
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- 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
- 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
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
-
- 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
- C01B33/02—Silicon
- C01B33/037—Purification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Multimedia (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a purification device of metallic silicon, which comprises a jaw crusher, a placing device, a color identification grabbing device, an airflow crusher and an impurity removal device, wherein the jaw crusher is arranged on the placing device; the color recognition grabbing device comprises a robot arm, a central controller and a color depth camera, wherein a signal output end of the color depth camera is electrically connected with a signal input end of the central controller, and a signal output end of the central controller is electrically connected with a signal input end of the robot arm. The method has the advantages of reasonable design and simple operation, can purify the simple substance silicon in the silicon slag, avoids the waste of resources and improves the production yield.
Description
Technical Field
The invention relates to the technical field of metal silicon, in particular to a metal silicon purification device and a using method thereof.
Background
Metallic silicon, also known as crystalline or industrial silicon, is used primarily as an additive to non-ferrous alloys. The metallic silicon is a product smelted by quartz and coke in an electric heating furnace, the content of a main component silicon element is about 98 percent (in recent years, the silicon element with the Si content of 99.99 percent is also contained in the metallic silicon), and the rest impurities are iron, aluminum, calcium and the like.
However, in the prior art, after the metal silicon is extracted, the residual silicon slag is generally used for paving the road, and the silicon slag comprises simple substance silicon, CaO and Al2O3And FeO, wherein the content of simple substance silicon in the silicon slag is ten percent to twenty percent, thereby causing great waste of resources.
Disclosure of Invention
The invention provides a purification device of metal silicon and a using method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a purification device of metallic silicon comprises a jaw crusher, a placing device, a color identification grabbing device, an airflow crusher and an impurity removal device;
the color identification grabbing device comprises a robot arm, a central controller and a color depth camera, wherein the signal output end of the color depth camera is electrically connected with the signal input end of the central controller, and the signal output end of the central controller is electrically connected with the signal input end of the robot arm;
the placing device comprises a placing box, sliding grooves which are arranged in a penetrating mode are formed in two side walls of the placing box, sliding rods are inserted into the two sliding grooves in a penetrating mode and are connected to the sliding grooves in a sliding mode, and baffles are fixedly connected to two ends of each sliding rod;
the edulcoration device includes the casing, a plurality of support columns of fixedly connected with on the end lateral wall of casing, the upper end fixedly connected with reaction tank of support column, fixedly connected with drain pipe on the end lateral wall of reaction tank, be equipped with the valve on the drain pipe, the upside fixedly connected with machine case of casing, the inside upside fixedly connected with servo motor of machine case, servo motor's output runs through last lateral wall and the fixedly connected with dwang of casing, the bottom fixedly connected with connecting rod of dwang, fixedly connected with filter vat on the connecting rod, a plurality of through-holes have been seted up on the lateral wall of filter vat, be equipped with the filter paper in the filter vat, fixedly connected with acidizing fluid input tube on the lateral wall of casing, be equipped with water spray mechanism on the casing.
As a further improvement scheme of the technical scheme: the spraying mechanism comprises a water tank, a water pipe is fixedly connected to the side wall of the water tank, a water pump is arranged on the water pipe and fixedly connected to the side wall of the shell, and a spraying nozzle is fixedly connected to one end of the water pipe.
As a further improvement scheme of the technical scheme: and flame heaters are arranged on the left side wall and the right side wall of the inside of the shell.
As a further improvement scheme of the technical scheme: and a dryer is arranged on the side wall on the inner part of the shell.
As a further improvement scheme of the technical scheme: the filter vat and the reaction tank are both made of ceramic materials.
As a further improvement scheme of the technical scheme: the filter barrel is in a round table shape with a narrow top and a wide bottom.
The use method of the metallic silicon purifying device comprises the following steps:
firstly, putting the silicon slag into a jaw crusher to be crushed into a block of one to two centimeters;
secondly, putting the crushed blocks obtained in the first step into a placing box, and moving a sliding rod back and forth to enable the crushed blocks to be flatly paved in the placing box;
thirdly, the color depth camera can shoot color depth images of the silicon slag blocks in the placing box, then the images are transmitted to the central controller, and the central controller controls the robot arm to take out the silicon slag blocks with light colors, so that the silicon slag blocks in the placing box are dark in color;
fourthly, putting the dark color crushed massive silicon slag in the previous step into an airflow crusher to be crushed into powder, then putting the powder silicon slag on filter paper in a filter barrel, then heating acid liquor into the filter barrel through an acid liquor input pipe, flushing the powder silicon slag with the acid liquor, then flowing the powder silicon slag into a reaction tank, stopping adding the acid liquor until the acid liquor submerges the powder silicon slag, enabling the powder silicon slag to enter a period of acid washing impurity removal time, starting a flame heater to heat the reaction tank during the acid washing impurity removal time, and starting a servo motor at the same time, wherein the servo motor drives the filter barrel to rotate through a rotating rod and a connecting rod;
and fifthly, after the acid washing impurity removal time is finished, closing the flame heater and the servo motor, opening the valve, discharging acid liquor through the liquid outlet pipe, then opening the water pump, spraying water flow in the water tank onto the impurity-removed powder silicon powder on the filter paper from the spraying nozzle through the water pipe by the water pump, after the acid liquor on the powder silicon powder is washed, closing the water pump, then starting the dryer, and drying the powder silicon powder by the dryer to obtain the purified silicon powder.
As a further improvement scheme of the technical scheme: in the fourth step, the acid solution is mixed acid formed by mixing hydrofluoric acid and hydrochloric acid.
As a further improvement scheme of the technical scheme: in the fourth step, the time for removing impurities by acid washing is five hours.
As a further improvement scheme of the technical scheme: and in the fifth step, the water flow in the water tank is deionized water.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the silicon slag is put into a jaw crusher to be crushed into a crushed block of one to two centimeters, then the obtained crushed block is put into a placing box 4, and the sliding rod 1 is moved back and forth, so that the crushed block-shaped silicon slag is flatly laid in the placing box 4, and the color depth camera canShoot the color depth image of the silicon slag in the crushed block shape in the placing box 4, then convey the image to the central controller, the central controller controls the robot arm to take out the silicon slag in the light color crushed block shape, so that the color of the silicon slag in the placing box 4 is dark, and CaO and Al in the silicon slag are in the dark color2O3FeO and SiO2The light-colored slag blocks can be formed together and selected out, the residual slag with dark color contains a large amount of elemental silicon, the elemental silicon content in the slag can be greatly improved, the dark-colored crushed massive silicon slag is put into an air flow grinder to be ground into powder, then the powder silicon slag is put on filter paper 23 in a filter barrel 21, acid liquor is heated into the filter barrel 21 through an acid liquor input pipe 8, the acid liquor flows into a reaction tank 9 after being washed by the powder silicon slag, the acid liquor is stopped being added until the acid liquor submerges the powder silicon slag, the powder silicon slag enters a period of acid washing impurity removal time, a flame heater 10 is started during the acid washing impurity removal time to heat the reaction tank 9 and start a servo motor 6, the servo motor 6 drives the filter barrel 21 to rotate through a rotating rod 19 and a connecting rod 20, the reaction efficiency of the powder silicon slag and the acid liquor can be accelerated through heating and rotating, the acid liquor is mixed acid of hydrofluoric acid and hydrochloric acid 4:1, the hydrofluoric acid can remove Fe ions in slag, the hydrochloric acid can remove Ca and Al ions in slag, further the remaining silicon is elemental silicon, after the acid washing impurity removal time is over, the flame heater 10 and the servo motor 6 are closed, the valve 17 is opened, the acid liquor is discharged through the liquid outlet pipe 11, the water pump 14 is opened, the water pump 14 can spray water in the water tank 12 onto the impurity-removed powder silicon powder on the filter paper 23 from the spraying nozzle 15 through the water pipe 13, after the acid liquor on the powder silicon powder is washed, the water pump 14 is closed, the dryer 7 is started, and the dryer 7 can dry the powder silicon powder to obtain the purified silicon powder.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to make the technical solutions of the present invention practical in accordance with the contents of the specification, the following detailed description is given of preferred embodiments of the present invention with reference to the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an apparatus for purifying silicon metal according to the present invention;
fig. 2 is a schematic structural diagram of a color recognition grabbing robot in the device for purifying metal silicon provided by the invention;
FIG. 3 is a schematic structural diagram of a placing device in an apparatus for purifying metallic silicon according to the present invention;
FIG. 4 is a schematic structural diagram of an impurity removal device in a device for purifying metallic silicon according to the present invention;
fig. 5 is a schematic structural view of an internal cross section of a filter vat in the apparatus for purifying silicon metal according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a sliding rod 1, a baffle 2, a sliding groove 3, a placing box 4, a chassis 5, a servo motor 6, a dryer 7, an acid liquor input tube 8, a reaction tank 9, a flame heater 10, a liquid outlet tube 11, a water tank 12, a water pipe 13, a water pump 14, a spray nozzle 15, a shell 16, a valve 17, a support column 18, a rotating rod 19, a connecting rod 20, a filter barrel 21, a through hole 22 and filter paper 23.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is more particularly described in the following paragraphs with reference to the accompanying drawings by way of example. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 5, in an embodiment of the present invention, a device for purifying silicon metal includes a jaw crusher, a placing device, a color recognition grabbing device, an air flow crusher, and an impurity removing device;
the color identification grabbing device comprises a robot arm, a central controller and a color depth camera, wherein the signal output end of the color depth camera is electrically connected with the signal input end of the central controller, and the signal output end of the central controller is electrically connected with the signal input end of the robot arm;
the placing device comprises a placing box 4, sliding grooves 3 which are arranged in a penetrating mode are formed in two side walls of the placing box 4, sliding rods 1 are inserted into the two sliding grooves 3 in a penetrating mode, the sliding rods 1 are connected into the sliding grooves 2 in a sliding mode, and two ends of each sliding rod 1 are fixedly connected with baffle plates 2;
edulcoration device includes casing 16, a plurality of support columns of fixedly connected with 18 on the end lateral wall of casing 16, the upper end fixedly connected with reaction tank 9 of support column 18, fixedly connected with drain pipe 11 on the end lateral wall of reaction tank 9, be equipped with valve 17 on the drain pipe 11, the upside fixedly connected with machine case 5 of casing 16, the inside upside fixedly connected with servo motor 6 of machine case 5, servo motor 6's output runs through casing 16's last lateral wall and fixedly connected with dwang 19, dwang 19's bottom fixedly connected with connecting rod 20, fixedly connected with filter vat 21 on the connecting rod 20, a plurality of through-holes 22 have been seted up on filter vat 21's the lateral wall, be equipped with filter paper 23 in the filter vat 21, fixedly connected with acidizing fluid input tube 8 on casing 6's the lateral wall, be equipped with water spray mechanism on the casing 16.
Referring to fig. 4, the spraying mechanism includes a water tank 12, a water pipe 13 is fixedly connected to a side wall of the water tank 12, a water pump 14 is disposed on the water pipe 13, the water pump 14 is fixedly connected to a side wall of the casing 16, a spraying nozzle 15 is fixedly connected to one end of the water pipe 13, the water pump 14 is turned on, and the water in the water tank 12 can be sprayed onto the impurity-removed powder silicon powder on the filter paper 23 through the water pipe 13 from the spraying nozzle 15 by the water pump 14, so as to wash away the acid solution on the powder silicon powder.
Referring to fig. 4, the left and right side walls of the casing 16 are provided with the flame heaters 10, and the flame heaters 10 can heat the filter barrel 21, thereby increasing the reaction efficiency of the powdered silicon slag and the acid solution.
Referring to fig. 4, a dryer 7 is disposed on an upper side wall inside the casing 16, and the dryer 7 can dry the washed powdered silicon powder to accelerate the drying speed.
Referring to fig. 4, the filter barrel 21 and the reaction tank 9 are made of ceramic materials, and the ceramic materials can prevent corrosion by acid liquor.
Referring to fig. 5, the filter barrel 21 is in the shape of a circular truncated cone with a narrow top and a wide bottom, and the circular truncated cone can prevent the slag powder inside from rotating out when the filter barrel 21 rotates.
The use method of the metallic silicon purifying device comprises the following steps:
firstly, putting the silicon slag into a jaw crusher to be crushed into a block of one to two centimeters;
secondly, putting the crushed blocks obtained in the first step into a placing box 4, and moving the sliding rod 1 back and forth to enable the crushed blocks to be flatly laid in the placing box 4;
thirdly, the color depth camera can shoot color depth images of the silicon slag blocks in the placing box 4, then the images are transmitted to the central controller, and the central controller controls the robot arm to take out the silicon slag blocks with light colors, so that the silicon slag blocks in the placing box 4 are dark in color;
fourthly, putting the dark color crushed massive silica slag in the previous step into an airflow crusher to be crushed into powder, then putting the powder silica slag on filter paper 23 in a filter barrel 21, then heating acid liquor into the filter barrel 21 through an acid liquor input pipe 8, flushing the powder silica slag with the acid liquor, then flowing the powder silica slag into a reaction tank 9, stopping adding the acid liquor until the acid liquor submerges the powder silica slag, enabling the powder silica slag to enter a period of acid washing impurity removal time, starting a flame heater 10 to heat the reaction tank 9 during the acid washing impurity removal time, and starting a servo motor 6 at the same time, wherein the servo motor 6 drives the filter barrel 21 to rotate through a rotating rod 19 and a connecting rod 20;
and fifthly, after the acid washing and impurity removing time is over, closing the flame heater 10 and the servo motor 6, opening the valve 17, discharging acid liquor through the liquid outlet pipe 11, then opening the water pump 14, spraying water flow in the water tank 12 onto the impurity-removed powder silicon powder on the filter paper 23 from the spraying nozzle 15 through the water pipe 13 by the water pump 14, after the acid liquor on the powder silicon powder is washed, closing the water pump 14, then starting the dryer 7, and drying the powder silicon powder by the dryer 7 to obtain the purified silicon powder.
In the fourth step, the acid solution is mixed acid of hydrofluoric acid and hydrochloric acid 4:1, the hydrofluoric acid can remove Fe ions in the slag, and the hydrochloric acid can remove Ca and Al ions in the slag, so that the rest is silicon simple substance.
In the fourth step, the time for removing impurities by acid washing is five hours.
In the fifth step, the water flow in the water tank 12 is deionized water, and the powdery silicon powder can be washed to be neutral by using the deionized water.
The working principle of the invention is as follows:
firstly, the silicon slag is put into a jaw crusher to be crushed into a crushed block of one to two centimeters, then the obtained crushed block is put into a placing box 4, and the sliding rod 1 is moved back and forth, so that the crushed block-shaped silicon slag is flatly laid in the placing box 4 and is kept in the colorThe color depth camera can shoot color depth images of the silicon slag in the crushed blocks in the placing box 4, then the images are conveyed to the central controller, the central controller controls the robot arm to take out the silicon slag in the light-color crushed blocks, so that the colors of the silicon slag in the crushed blocks in the placing box 4 are dark, and CaO and Al in the silicon slag are in the dark color2O3FeO and SiO2The light-colored slag blocks can be formed together and selected out, the residual dark-colored slag contains a large amount of elemental silicon, the elemental silicon content in the slag can be greatly improved, the dark-colored crushed massive silicon slag is put into a jet mill to be crushed into powder, then the powdered silicon slag is put on filter paper 23 in a filter vat 21, acid liquor is heated into the filter vat 21 through an acid liquor input pipe 8, the acid liquor flows into a reaction tank 9 after being washed by the powdered silicon slag, the acid liquor is stopped to be added until the acid liquor submerges the powdered silicon slag, the powdered silicon slag enters a period of acid washing impurity removal time, a flame heater 10 is started to heat the reaction tank 9 and simultaneously a servo motor 6 is started during the acid washing impurity removal time, the servo motor 6 drives the filter vat 21 to rotate through a rotating rod 19 and a connecting rod 20, the reaction efficiency of the powdered silicon slag and the acid liquor can be accelerated through heating and rotating, the acid solution is mixed acid formed by mixing hydrofluoric acid and hydrochloric acid 4:1, the hydrofluoric acid can remove Fe ions in slag, the hydrochloric acid can remove Ca and Al ions in the slag, further the residual silicon is a silicon simple substance, after the acid cleaning and impurity removing time is over, the flame heater 10 and the servo motor 6 are closed, the valve 17 is opened, the acid solution is discharged through the liquid outlet pipe 11, the water pump 14 is opened, the water pump 14 can spray water flow in the water tank 12 onto the impurity-removed powder silicon powder on the filter paper 23 from the spraying nozzle 15 through the water pipe 13, after the acid solution on the powder silicon powder is washed, the water pump 14 is closed, the dryer 7 is started, and the dryer 7 can dry the powder silicon powder to obtain purified silicon powder.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The device for purifying the metallic silicon is characterized by comprising a jaw crusher, a placing device, a color identification grabbing device, an airflow crusher and an impurity removing device;
the color identification grabbing device comprises a robot arm, a central controller and a color depth camera, wherein a signal output end of the color depth camera is electrically connected with a signal input end of the central controller, and a signal output end of the central controller is electrically connected with a signal input end of the robot arm;
the placing device comprises a placing box (4), sliding grooves (3) which are arranged in a penetrating mode are formed in two side walls of the placing box (4), sliding rods (1) are inserted into the two sliding grooves (3), the sliding rods (1) are connected into the sliding grooves (2) in a sliding mode, and baffles (2) are fixedly connected to two ends of each sliding rod (1);
the impurity removing device comprises a shell (16), a plurality of supporting columns (18) are fixedly connected to the bottom side wall of the shell (16), a reaction tank (9) is fixedly connected to the upper end of each supporting column (18), a liquid outlet pipe (11) is fixedly connected to the bottom side wall of the reaction tank (9), a valve (17) is arranged on each liquid outlet pipe (11), a case (5) is fixedly connected to the upper side of the shell (16), a servo motor (6) is fixedly connected to the upper side of the inside of the case (5), the output end of the servo motor (6) penetrates through the upper side wall of the shell (16) and is fixedly connected with a rotating rod (19), a connecting rod (20) is fixedly connected to the bottom end of the rotating rod (19), a filter barrel (21) is fixedly connected to the connecting rod (20), a plurality of through holes (22) are formed in the side wall of the filter barrel (21), filter paper (23) is arranged in the filter barrel (21), an acid liquor input pipe (8) is fixedly connected to the side wall of the shell (6), and a water spraying mechanism is arranged on the shell (16).
2. The purification device of silicon metal according to claim 1, wherein the spraying mechanism comprises a water tank (12), a water pipe (13) is fixedly connected to the side wall of the water tank (12), a water pump (14) is arranged on the water pipe (13), the water pump (14) is fixedly connected to the side wall of the shell (16), and a spraying nozzle (15) is fixedly connected to one end of the water pipe (13).
3. The apparatus for purifying silicon metal according to claim 1, wherein the fired heaters (10) are provided on both inner left and right side walls of the casing (16).
4. A purification apparatus of silicon metal according to claim 1, wherein the inner upper side wall of said casing (16) is provided with a drier (7).
5. The apparatus for purifying silicon metal according to claim 1, wherein the filter vat (21) and the reaction tank (9) are made of ceramic.
6. The apparatus for purifying silicon metal according to claim 1, wherein the filtering barrel (21) has a circular truncated cone shape with a narrow top and a wide bottom.
7. The application method of the metallic silicon purification device is characterized by comprising the following steps:
firstly, putting the silicon slag into a jaw crusher to be crushed into a block of one to two centimeters;
secondly, putting the crushed blocks obtained in the first step into a placing box (4), and then moving a sliding rod (1) back and forth to enable the crushed silicon slag to be flatly paved in the placing box (4);
thirdly, the color depth camera can shoot color depth images of the silicon slag blocks in the placing box (4), then the images are transmitted to the central controller, and the central controller controls the robot arm to take out the light-color silicon slag blocks, so that the silicon slag blocks in the placing box (4) are dark in color;
fourthly, the dark color crushed massive silicon slag in the previous step is put into an airflow grinder to be ground into powder, then the powder silicon slag is put on filter paper (23) in a filter barrel (21), then acid liquor is heated into the filter barrel (21) through an acid liquor input pipe (8), the acid liquor flows into a reaction tank (9) after being washed by the powder silicon slag, the acid liquor is stopped to be added until the acid liquor submerges the powder silicon slag, so that the powder silicon slag enters a period of acid washing impurity removal time, a flame heater (10) is started to heat the reaction tank (9) and a servo motor (6) is started at the same time when the acid washing impurity removal time is reached, and the servo motor (6) drives the filter barrel (21) to rotate through a rotating rod (19) and a connecting rod (20);
and fifthly, after the acid washing impurity removal time is finished, closing the flame heater (10) and the servo motor (6), opening the valve (17), discharging acid liquor through the liquid outlet pipe (11), then opening the water pump (14), spraying water flow in the water tank (12) onto the impurity-removed powder silicon powder on the filter paper (23) through the water pipe (13) by the water pump (14), after the acid liquor on the powder silicon powder is washed, closing the water pump (14), then starting the dryer (7), and drying the powder silicon powder by the dryer (7) to obtain the purified silicon powder.
8. The use method of a device for purifying metallic silicon as claimed in claim 7, wherein in the fourth step, the acid solution is a mixed acid of hydrofluoric acid and hydrochloric acid 4: 1.
9. The use method of the device for purifying metallic silicon as recited in claim 7, wherein in the fourth step, the acid cleaning time for removing impurities is five hours.
10. The use method of a device for purifying metallic silicon as claimed in claim 7, wherein in the fifth step, the water flow in the water tank (12) is deionized water.
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Application publication date: 20220603 |