CN115818585A - Process for smelting and extracting selenium - Google Patents
Process for smelting and extracting selenium Download PDFInfo
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- CN115818585A CN115818585A CN202310017779.7A CN202310017779A CN115818585A CN 115818585 A CN115818585 A CN 115818585A CN 202310017779 A CN202310017779 A CN 202310017779A CN 115818585 A CN115818585 A CN 115818585A
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- sodium sulfite
- containing material
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- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000011669 selenium Substances 0.000 title claims abstract description 121
- 229910052711 selenium Inorganic materials 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003723 Smelting Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 97
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 82
- 238000000498 ball milling Methods 0.000 claims abstract description 55
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003513 alkali Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000007602 hot air drying Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims description 47
- 239000000243 solution Substances 0.000 claims description 25
- CJCPHQCRIACCIF-UHFFFAOYSA-L disodium;dioxido-oxo-selanylidene-$l^{6}-sulfane Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=[Se] CJCPHQCRIACCIF-UHFFFAOYSA-L 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 239000002244 precipitate Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 229910052709 silver Inorganic materials 0.000 claims description 14
- 239000004332 silver Substances 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000013049 sediment Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010310 metallurgical process Methods 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- 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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Abstract
The invention relates to the technical field of metallurgical processes, in particular to a process for extracting selenium through smelting. A process for smelting and extracting selenium, which can grind selenium-containing materials again after ball milling and can perform intermittent blanking. A process for smelting and extracting selenium comprises the following steps: s1, preparing materials: taking 400-900g of selenium-containing material, 100-1000g of water, 50-300g of sodium sulfite and 40-60g of alkali adjusting solution; s2, ball milling: ball milling 400-900g of selenium-containing material for 1-2.5h at 40-60 ℃ to 120-900 meshes, wherein the ball milling comprises the following specific steps: s2-1, drying the selenium-containing material before ball milling, wherein a hot air drying mode is adopted, the drying temperature is 60-85 ℃, and the drying time is 30-50 min. When the selenium-containing material is subjected to ball milling, the ball milling is carried out twice, and the filtering treatment is carried out after the ball milling, so that the material obtained by the ball milling is more exquisite, and the large material can be recovered.
Description
Technical Field
The invention relates to the technical field of metallurgical processes, in particular to a process for extracting selenium through smelting.
Background
The extraction of selenium in smelting is a process in metallurgy, water, selenium-containing materials, sodium sulfite and alkali adjusting solution are mixed together, heating reaction is carried out to prepare a mixture of sodium selenosulfate and precipitate, the sodium selenosulfate is heated again, then sulfuric acid is added to prepare solid selenium and solution, and selenium is extracted from the solution.
The process for smelting and extracting selenium can be developed at present, wherein the process can be used for ball-milling selenium-containing materials and then grinding the selenium-containing materials again, and can be used for intermittent blanking.
Disclosure of Invention
In order to overcome the defects that the selenium-containing material has a large material volume and is difficult to mix in the prior art, people pour the material into a reactor at one time, and the mixing is easy to cause non-uniformity, the technical problem to be solved is as follows: provides a process for smelting and extracting selenium, which can grind selenium-containing materials again after ball milling and can perform intermittent blanking.
A process for smelting and extracting selenium comprises the following steps:
s1, preparing materials: taking 400-900g of selenium-containing material, 100-1000g of water, 50-300g of sodium sulfite and 40-60g of alkali adjusting solution;
s2, ball milling: ball milling 400-900g of selenium-containing material for 1-2.5h at 40-60 ℃ to 120-900 meshes, wherein the ball milling comprises the following specific steps:
s2-1, drying the selenium-containing material before ball milling, wherein a hot air drying mode is adopted, the drying temperature is 60-85 ℃, and the drying time is 30-50 min;
s2-2, ball milling for two times, namely putting 200-400g of selenium-containing materials into a ball mill, starting the ball mill to perform ball milling, taking out 200-400g of the ball-milled selenium-containing materials after ball milling for 30min, adding 200-500g of the selenium-containing materials again, performing ball milling by using the ball mill for 30min, and performing ball milling on the materials for two times;
s2-3, filtering the powdery selenium-containing material in the S2-2, and performing ball milling treatment after filtering out large blocks of the powdery selenium-containing material.
S3, mixing reaction: adding 100-1000g of water into a reactor, adding 50-300g of powdery selenium-containing material, 50-300g of sodium sulfite and 40-60g of alkali adjusting solution, and reacting for 1-1.5h to prepare a mixture of sodium selenosulfate and precipitate;
s4, filtering: filtering the mixture of the sodium selenosulfate and the precipitate in the S3 to obtain sodium selenosulfate liquid and precipitate containing silver, copper and the like;
s5, reacting again: heating the sodium selenosulfate liquid obtained by filtering in the step S4 again for reaction, and adding sulfuric acid to adjust the pH value to 6-7 to prepare a mixed solution;
s6, washing treatment: and washing the mixed solution to obtain the crude selenium.
Further, the specific steps in S3 are:
s3-1, adjusting the temperature in the reactor to 65-90 ℃, moving the movable cover plate backwards, and injecting water above the reactor;
s3-2, driving a stirrer to rotate through rotation of a rotating shaft by a motor, pouring powdery selenium-containing materials, sodium sulfite and alkali adjusting solution into the stirrer through the upper part of the reactor, and enabling the powdery selenium-containing materials and the sodium sulfite to fall to the upper part of an upper grinding disc;
s3-3, driving an upper grinding disc to rotate by a rotating shaft, enabling the powdery selenium-containing material and sodium sulfite to fall onto a lower grinding disc through a strip-shaped groove in the upper grinding disc, grinding the powdery selenium-containing material and the sodium sulfite by the rotation of the upper grinding disc and the matching of the lower grinding disc, and enabling the ground selenium-containing material and the sodium sulfite to fall into water downwards;
s3-4, mixing water, the ground selenium-containing material, sodium sulfite and an alkali adjusting solution together by rotating a stirrer, dissolving selenium in an alkaline sodium sulfite solution, reacting to form water-soluble sodium selenosulfate, and retaining silver, copper and other substances in the solution in the form of precipitates;
further, in S3-4, the stirring rod can be driven to rotate when the stirrer on the upper side rotates, the stirring rod rotates the intermittent extrusion wedge block, the wedge block can be jacked upwards, the wedge block can enable the lower grinding disc to move upwards to be attached to the upper grinding disc, the upper grinding disc always keeps rotating to achieve the purpose of grinding, the wedge block is loosened by the stirring rod, the lower grinding disc can move downwards, and the lower grinding disc shakes up and down so that the ground selenium-containing material and sodium sulfite fall downwards.
Further, the filtering process in S4 specifically operates as follows:
s4-1, placing a collecting container below the reactor;
s4-2, remaining the mixed liquid prepared in the S3 at the lower part in the reactor, rotating to open the opening and closing disc 14, wherein the opening and closing disc 14 is not blocked at the lower part of the reactor, filtering the liquid by a precipitate filter, collecting the sodium selenosulfate liquid downwards in a collecting container, and remaining the precipitate containing silver, copper and other substances on the precipitate filter;
and S4-3, removing the sediment filter, and taking out and recycling the sediment containing silver, copper and the like.
Further, pouring the sodium selenosulfate liquid obtained by filtering in the step S4 into the reactor again, heating for 10min, adding 10-15g of sulfuric acid, continuing to heat for 10-30min, continuing to add 10-15g of sulfuric acid, and stirring and mixing through a stirrer to obtain solid crystals and a mixed solution.
Further, before the mixed solution is washed, filtering the solid crystal and the mixed solution, wherein the solid crystal is crude selenium, and then washing the crude selenium by using a water gun for 20-50min to obtain the crude selenium.
Further, drying the crude selenium prepared in the step S6 at the temperature of 30-60 ℃ for 20-30min.
Further, weighing the dried crude selenium, and quantitatively packaging, wherein the amount of each package of crude selenium is 5-10g.
The invention has the following advantages: 1. when the selenium-containing material is subjected to ball milling, the ball milling is carried out twice, and the filtering treatment is carried out after the ball milling, so that the material obtained by the ball milling is more exquisite, and the large material can be recovered.
2. According to the invention, the materials are automatically ground before being mixed, and the lower grinding disc intermittently moves up and down, so that the effect of automatic intermittent blanking can be realized, and the ground selenium-containing materials and sodium sulfite can be more quickly mixed in water.
3. According to the invention, the sodium selenosulfate liquid and the precipitate containing silver, copper and other substances can be filtered and separated through the precipitate filter, so that people can conveniently collect the sodium selenosulfate liquid and the silver, copper and other substances.
Drawings
FIG. 1 is a schematic perspective view of a reaction apparatus according to the present invention.
FIG. 2 is a schematic perspective view of the reactor, the supporting frame and the movable cover plate according to the present invention.
FIG. 3 is a sectional view showing a three-dimensional structure of a reaction apparatus according to the present invention.
FIG. 4 is a diagram illustrating the polishing process of the present invention.
The reference signs are: 1-base, 2-reactor, 3-support frame, 4-motor, 5-fixed cover plate, 6-movable cover plate, 7-rotating shaft, 8-upper grinding disc, 9-lower grinding disc, 10-stirrer, 11-deflector rod, 12-wedge block, 13-sediment filter, 14-opening and closing disc and 15-adapter sleeve.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
Example 1
A reaction device is shown in figures 1-4, and comprises a base 1, a reactor 2, a support frame 3, a motor 4, a fixed cover plate 5, a movable cover plate 6, a rotating shaft 7, an upper grinding plate 8, a lower grinding plate 9, a stirrer 10, a deflector rod 11, a wedge block 12, a sediment filter 13, an opening and closing disc 14 and a switching sleeve 15, wherein the upper part of the base 1 is connected with the reactor 2 through bolts, the top of the reactor 2 is connected with the support frame 3, the motor 4 is connected in the support frame 3, the rear part of the support frame 3 is connected with the movable cover plate 6 in a sliding way, the movable cover plate 6 can block an inlet above the reactor 2, the front side of the top of the reactor 2 is welded with the fixed cover plate 5, the output shaft of the motor 4 is connected with the rotating shaft 7, and the lower part of the rotating shaft 7 is connected with two stirrers 10, agitator 10 can be in the same place the material mixture, 7 upper portions of pivot are connected with abrasive disc 8, 7 upper portion sliding type in pivot is connected with switching cover 15, 15 outside rotary type of switching cover is connected with abrasive disc 9 down, abrasive disc 9 and 2 inner wall sliding type of reactor are connected down, abrasive disc 9 is located abrasive disc 8 lower part down, 10 tops of agitator of upside are evenly connected with 5 driving lever 11 along the circumferencial direction, abrasive disc 9 bottoms evenly are connected with 5 wedges 12 along the circumferencial direction down, driving lever 11 rotates and can intermittent type formula extrusion wedge 12, the sub-unit connection has the precipitate filter 13 that can dismantle in the reactor 2, 2 bottom right side rotary types of reactor are connected with the disc 14 that opens and shuts, the disc 14 that opens and shuts is located precipitate filter 13 lower part.
Example 2
A process for extracting selenium by smelting, as shown in figures 1-4, comprises the following steps:
s1, preparing materials: taking 600g of selenium-containing material, 900g of water, 200g of sodium sulfite and 60g of alkali adjusting solution;
s2, ball milling: ball milling 600g of selenium-containing material for 1-2.5h at 40-60 ℃ to 120-900 meshes, wherein the ball milling comprises the following specific steps:
s2-1, drying the selenium-containing material before ball milling, wherein a hot air drying mode is adopted, the drying temperature is 60-85 ℃, and the drying time is 30-50 min;
s2-2, ball milling twice, namely putting 600g of selenium-containing material into a ball mill, starting the ball mill to perform ball milling, after ball milling for 30min, taking out 200g of the ball-milled selenium-containing material, adding 300g of the selenium-containing material again, performing ball milling by using the ball mill for 30min, and performing ball milling on the material twice, so that the ball-milled selenium-containing powder is finer;
and S2-3, filtering the powdery selenium-containing material in the S2-2, and performing ball milling treatment after filtering out large materials in the powdery selenium-containing material.
S3, mixing reaction:
s3-1, adjusting the temperature in the reactor 2 to 65-90 ℃, moving the movable cover plate 6 backwards, and injecting water above the reactor 2;
s3-2, driving a stirrer 10 to rotate through rotation of a rotating shaft 7 by a motor 4, pouring powdery selenium-containing materials, sodium sulfite and alkali adjusting solution into the reactor 2 from the upper part, and dropping the powdery selenium-containing materials and the sodium sulfite to the upper part of an upper grinding disc 8;
s3-3, pivot 7 drives the last abrasive disc 8 and rotates, pulverous selenium-containing material and sodium sulfite drop to lower abrasive disc 9 through the bar groove on last abrasive disc 8 on, go up abrasive disc 8 and rotate and grind pulverous selenium-containing material and sodium sulfite with lower abrasive disc 9 cooperation, the selenium-containing material and sodium sulfite after the grinding then drop to the aquatic downwards, so can grind the material again before mixing, and can realize the unloading of intermittent type formula and can make the more quick mixture of material in the aquatic.
S3-4, the stirrer 10 rotates to mix water, the ground selenium-containing material, sodium sulfite and alkali adjusting solution together, the deflector rod 11 is driven to rotate when the stirrer 10 on the upper side rotates, the deflector rod 11 rotates to intermittently extrude the wedge-shaped block 12, the wedge-shaped block 12 can be jacked upwards, the wedge-shaped block 12 enables the lower grinding disc 9 to move upwards to be attached to the upper grinding disc 8, the upper grinding disc 8 always rotates to achieve the grinding purpose, the deflector rod 11 loosens the wedge-shaped block 12, the lower grinding disc 9 moves downwards, the lower grinding disc 9 shakes up and down to enable the ground selenium-containing material and the sodium sulfite to fall downwards, selenium is dissolved in the alkali sodium sulfite solution and reacts into sodium selenosulfate which is easy to dissolve in water, and substances such as silver, copper and the like are still kept in the solution in the form of precipitates.
Example 3
On the basis of the example 1, as shown in figures 1-4, a process for smelting and extracting selenium comprises the following steps:
s1, preparing materials: taking 600g of selenium-containing material, 900g of water, 200g of sodium sulfite and 60g of alkali adjusting solution;
s2, ball milling: ball milling 600g of selenium-containing material for 1-2.5h at 40-60 ℃ to 120-900 meshes, wherein the ball milling comprises the following specific steps:
s2-1, drying the selenium-containing material before ball milling, wherein a hot air drying mode is adopted, the drying temperature is 60-85 ℃, and the drying time is 30-50 min;
s2-2, ball milling twice, namely putting 600g of selenium-containing material into a ball mill, starting the ball mill to perform ball milling, taking out 200g of the ball-milled selenium-containing material after ball milling for 30min, adding 400g of the selenium-containing material again, performing ball milling by using the ball mill for 30min, and performing ball milling on the material twice, so that the ball-milled selenium-containing powder is finer;
and S2-3, filtering the powdery selenium-containing material in the S2-2, and performing ball milling treatment after filtering out large materials in the powdery selenium-containing material.
S3, mixing reaction:
s3-1, adjusting the temperature in the reactor 2 to 65-90 ℃, moving the movable cover plate 6 backwards, and injecting water above the reactor 2;
s3-2, driving a stirrer 10 to rotate through rotation of a rotating shaft 7 by a motor 4, pouring powdery selenium-containing materials, sodium sulfite and alkali adjusting solution into the reactor 2 from the upper part, and dropping the powdery selenium-containing materials and the sodium sulfite to the upper part of an upper grinding disc 8;
s3-3, pivot 7 drives the last abrasive disc 8 and rotates, pulverous selenium-containing material and sodium sulfite drop to lower abrasive disc 9 through the bar groove on last abrasive disc 8 on, go up abrasive disc 8 and rotate and grind pulverous selenium-containing material and sodium sulfite with lower abrasive disc 9 cooperation, the selenium-containing material and sodium sulfite after the grinding then drop to the aquatic downwards, so can grind the material again before mixing, and can realize the unloading of intermittent type formula and can make the more quick mixture of material in the aquatic.
3-4, mixing water, the ground selenium-containing material, sodium sulfite and an alkali adjusting solution together by rotating a stirrer 10, driving a deflector rod 11 to rotate when the upper stirrer 10 rotates, pushing the wedge block 12 upwards by rotating the deflector rod 11 to intermittently extrude the wedge block 12, enabling the wedge block 12 to move the lower grinding disc 9 upwards to be attached to the upper grinding disc 8 by the wedge block 12, enabling the upper grinding disc 8 to rotate all the time to achieve the grinding purpose, loosening the wedge block 12 by the deflector rod 11, enabling the lower grinding disc 9 to move downwards, enabling the lower grinding disc 9 to shake up and down to enable the ground selenium-containing material and the sodium sulfite to fall downwards, dissolving selenium into an alkali sodium sulfite solution, reacting into sodium selenosulfate which is easy to dissolve in water, and keeping silver, copper and other substances in the solution in the form of precipitates;
s4, filtering:
s4-1, placing a collecting container below the reactor 2;
s4-2, reserving the mixed liquid prepared in the S3 at the lower part in the reactor 2, rotating to open the opening and closing disc 14, enabling the opening and closing disc 14 not to block the lower part of the reactor 2, filtering out the liquid by the sediment filter 13, collecting the sodium selenosulfate liquid downwards in a collection container, and reserving the sediment containing silver, copper and the like on the sediment filter 13;
s4-3, removing the precipitate filter 13, taking out the precipitate containing silver, copper and the like, recovering, pouring the filtered sodium selenosulfate liquid into the reactor 2 again, heating for 10min, adding 10-15g of sulfuric acid, continuing to heat for 10-30min, continuing to add 10-15g of sulfuric acid, and stirring and mixing through the stirrer 10 to prepare solid crystals and a mixed solution.
S5, reacting again: heating the sodium selenosulfate liquid obtained by filtering in the step S4 again for reaction, and adding sulfuric acid to adjust the pH value to 6-7 to prepare a mixed solution;
s6, washing treatment: filtering the solid crystals and the mixed solution to obtain crude selenium, washing the crude selenium by using a water gun for 20-50min to obtain crude selenium, drying the prepared crude selenium at the drying temperature of 30-60 ℃ for 20-30min, weighing the dried crude selenium, and quantitatively packaging, wherein the amount of each package of crude selenium is 5-10g.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A process for smelting and extracting selenium is characterized by comprising the following steps:
s1, preparing materials: taking 400-900g of selenium-containing material, 100-1000g of water, 50-300g of sodium sulfite and 40-60g of alkali adjusting solution;
s2, ball milling: ball milling 400-900g of selenium-containing material for 1-2.5h at 40-60 ℃ to 120-900 meshes, wherein the ball milling comprises the following specific steps:
s2-1, drying the selenium-containing material before ball milling, wherein a hot air drying mode is adopted, the drying temperature is 60-85 ℃, and the drying time is 30-50 min;
s2-2, ball milling for two times, namely putting 200-400g of selenium-containing materials into a ball mill, starting the ball mill to perform ball milling, taking out 200-400g of the ball-milled selenium-containing materials after ball milling for 30min, adding 200-500g of the selenium-containing materials again, performing ball milling by using the ball mill for 30min, and performing ball milling on the materials for two times;
and S2-3, filtering the powdery selenium-containing material in the S2-2, and performing ball milling treatment after filtering out large materials in the powdery selenium-containing material.
S3, mixing reaction: adding 100-1000g of water into a reactor (2), adding a powdery selenium-containing material, 50-300g of sodium sulfite and 40-60g of alkali adjusting solution, and reacting for 1-1.5h to prepare a mixture of sodium selenosulfate and a precipitate;
s4, filtering: filtering the mixture of the sodium selenosulfate and the precipitate in the step S3 to obtain sodium selenosulfate liquid and precipitate containing silver, copper and the like;
s5, reacting again: heating the sodium selenosulfate liquid obtained by filtering in the step S4 again for reaction, and adding sulfuric acid to adjust the pH value to 6-7 to prepare a mixed solution;
s6, washing treatment: and washing the mixed solution to obtain the crude selenium.
2. The process for smelting and extracting selenium according to claim 1, wherein the specific steps in S3 are as follows:
s3-1, adjusting the temperature in the reactor (2) to 65-90 ℃, moving the movable cover plate (6) backwards, and injecting water above the reactor (2);
s3-2, driving a stirrer (10) to rotate through rotation of a rotating shaft (7) by a motor (4), pouring powdery selenium-containing materials, sodium sulfite and alkali adjusting solution into the reactor (2) through the upper part of the reactor, and dropping the powdery selenium-containing materials and the sodium sulfite to the upper part of an upper grinding disc (8);
s3-3, driving an upper grinding disc (8) to rotate by a rotating shaft (7), enabling powdery selenium-containing materials and sodium sulfite to fall onto a lower grinding disc (9) through a strip-shaped groove in the upper grinding disc (8), enabling the upper grinding disc (8) to rotate and be matched with the lower grinding disc (9) to grind the powdery selenium-containing materials and the sodium sulfite, and enabling the ground selenium-containing materials and the sodium sulfite to fall into water downwards;
and S3-4, mixing water, the ground selenium-containing material, sodium sulfite and the alkali adjusting solution together by rotating a stirrer (10), dissolving selenium in the alkaline sodium sulfite solution, reacting to form water-soluble sodium selenosulfate, and retaining silver, copper and other substances in the solution in the form of precipitates.
3. The process for smelting and extracting selenium according to claim 2, wherein in S3-4, the stirrer (10) on the upper side rotates to drive the shift lever (11) to rotate, the shift lever (11) rotates to intermittently extrude the wedge-shaped block (12), so that the wedge-shaped block (12) is jacked upwards, the wedge-shaped block (12) enables the lower grinding disc (9) to move upwards to be attached to the upper grinding disc (8), the upper grinding disc (8) always keeps rotating to achieve the purpose of grinding, the shift lever (11) loosens the wedge-shaped block (12), the lower grinding disc (9) moves downwards, and the lower grinding disc (9) shakes up and down so that the ground selenium-containing materials and sodium sulfite fall downwards.
4. The process for smelting and extracting selenium according to claim 1, wherein the filtering treatment in the S4 comprises the following specific operations:
s4-1, placing a collecting container below the reactor (2);
s4-2, reserving the mixed liquid prepared in the S3 at the lower part in the reactor (2), rotating to open the opening and closing disc 14, enabling the opening and closing disc 14 not to block the lower part of the reactor (2), filtering out the liquid by a sediment filter (13), collecting the sodium selenosulfate liquid downwards in a collection container, and reserving the sediment containing silver, copper and other substances on the sediment filter (13);
and S4-3, removing the sediment filter (13), and taking out and recovering the sediment containing silver, copper and the like.
5. The process for smelting and extracting selenium according to claim 1, wherein in S5, the sodium selenosulfate liquid obtained by filtering in S4 is poured into the reactor (2) again, after heating for 10min, 10-15g of sulfuric acid is added, after continuing to heat for 10-30min, 10-15g of sulfuric acid is added, and after stirring and mixing by the stirrer (10), solid crystals and mixed solution are prepared.
6. The process of claim 1, wherein in step S6, before the mixed solution is washed, the solid crystals and the mixed solution are filtered, the solid crystals are crude selenium, and the crude selenium is washed by a water gun for 20-50min to obtain the crude selenium.
7. The process for smelting and extracting selenium according to claim 6, wherein the crude selenium obtained in S6 is dried at 30-60 ℃ for 20-30min.
8. The process for smelting and extracting selenium according to claim 7, wherein the dried crude selenium is weighed and quantitatively packaged, and the amount of each package of crude selenium is 5-10g.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117797691A (en) * | 2024-02-27 | 2024-04-02 | 福建冠宝新材料科技有限公司 | A ejection of compact stirred tank for industrial chemicals production |
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| CN117797691A (en) * | 2024-02-27 | 2024-04-02 | 福建冠宝新材料科技有限公司 | A ejection of compact stirred tank for industrial chemicals production |
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