CN112058868B - Solid waste residue processing apparatus in electrolytic magnesium production - Google Patents
Solid waste residue processing apparatus in electrolytic magnesium production Download PDFInfo
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- CN112058868B CN112058868B CN202010895797.1A CN202010895797A CN112058868B CN 112058868 B CN112058868 B CN 112058868B CN 202010895797 A CN202010895797 A CN 202010895797A CN 112058868 B CN112058868 B CN 112058868B
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000011777 magnesium Substances 0.000 title claims abstract description 57
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 55
- 239000002910 solid waste Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 title claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 84
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 8
- 239000008235 industrial water Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000007789 gas Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000001257 hydrogen Substances 0.000 abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000002360 explosive Substances 0.000 abstract description 3
- 230000006399 behavior Effects 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 15
- 150000003839 salts Chemical class 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000013049 sediment Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
-
- 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)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a device for treating solid waste residues in electrolytic magnesium production. The device consists of a slag crushing unit and a slag processing unit. The large waste slag is crushed and then passes through a slag treatment unit to capture and treat gas generated by reaction, and reaction residues are stacked after dehydration. The device can recover valuable metal magnesium in the solid waste residue to the maximum extent, and the recovery rate can reach over 86 percent; in addition, the active solid waste residue can be converted into non-reactive inert harmless substances after being processed, and the potential danger of combustible explosive gas hydrogen and the potential environmental pollution problem of harmful gas ammonia are radically eliminated. The device has the advantages of simple operation, high working efficiency, strong solid waste residue treatment capacity, short overhaul period and cost and labor saving; the whole treatment process is reliable, standard and green, and has important guiding and reference significance for standardizing the behaviors of the electrolytic magnesium industry and promoting the high-quality development of the electrolytic magnesium industry in China.
Description
Technical Field
The invention relates to the technical field of magnesium metal industrial waste residue treatment, in particular to a treatment device for solid waste residue in electrolytic magnesium production.
Background
At present, the main methods for industrially producing metal magnesium include a metallothermic reduction method and a molten salt electrolysis method. The solid waste residue in the production of electrolytic magnesium has three sources: slag of a magnesium electrolytic cell; magnesium molten salt furnace slag; slag of magnesium continuous refining furnace.
In the production of electrolytic magnesium, the working media in the refractory material tank (furnace) chambers of a magnesium electrolytic tank, a magnesium molten salt furnace and a magnesium continuous refining furnace are MgCl 2 -NaCl-CaCl 2 -KCl-based mixed molten salt and having magnesium liquid on the surface thereof. In the operation and maintenance processes of a magnesium electrolytic cell, a magnesium molten salt furnace and a magnesium continuous refining furnace, the generation and accumulation of tank (furnace) slag are generated and generated from the following steps: (1) Supplementing or adjusting impurities such as oxides and the like brought along with the additive during the molten salt component; (2) The water brought by the additive and the tools can react with the melting medium in the furnace (groove) to generate furnace (groove) slag; (3) The air entering the furnace (groove) reacts with the high-temperature medium in the furnace (groove) to generate furnace (groove) slag.
The magnesium oxide is wetted by the molten salt and then deposited on the bottom of the furnace or the bottom of the electrolytic cell to form slag. The production and the accumulation of stove (groove) sediment can cause adverse effect to the normal operating of stove (groove), must clear up out with mechanical grab bucket or artifical sediment harrow when stove (groove) bottom slag blanket accumulation to certain thickness, and the red hot soft muddy water form sediment holds and goes into in preheating dry steel sediment fill in advance, treats to solidify the back fork completely and transports the sediment and handle the workshop and handle.
The main components of the solid waste residue in the electrolytic magnesium production are as follows: mgO, mgCl 2 、CaCl 2 NaCl, KCl, mg and Mg 3 N 2 The slag is active, and combustible explosion gas hydrogen and toxic gas ammonia are generated by stacking and exposing the slag to air, particularly humid air, and the chemical reaction equation is as follows: mg (Mg) 3 N 2 +6H 2 O＝3Mg(OH) 2 +2NH 3 ↑；Mg+2H 2 O＝Mg(OH) 2 +H 2 ×) instil. Explosion or injury can occur when the concentrations of hydrogen and ammonia generated by the reaction accumulate sufficiently high. Therefore, the disposal of solid slag is necessary.
At present, no complete and standard device or process special for solid waste slag in electrolytic magnesium production exists in the industry. In the design specification of the electrolytic magnesium, the solid waste residue in the production of the electrolytic magnesium is still qualified as common industrial solid waste. Related electrolytic magnesium production enterprises adopt an anti-seepage process and perform anti-seepage treatment on sites and slopes according to the requirements of general industrial solid storage and disposal site pollution control standard (GB 18599-2001). The method without treatment not only can not recover valuable metal magnesium in the slag, which causes great economic loss, but also causes environmental pollution and personnel injury accidents.
Disclosure of Invention
In order to solve the problems that solid waste residues contain metal magnesium in the prior electrolytic magnesium production, have activity and can generate combustible and explosive gases such as hydrogen and toxic gases ammonia when stacked and exposed in air, particularly humid air, the invention controls the whole process and collects and treats reaction generated gas by crushing large waste residues into particles with the particle size of less than 2mm and then reacting with industrial water, and the residues of the reaction are stacked after dehydration, thereby finally aiming at providing a device for treating the solid waste residues in the electrolytic magnesium production.
The invention relates to a technical scheme of a solid waste residue treatment device in electrolytic magnesium production, which comprises the following steps:
a treatment device for solid waste residues in electrolytic magnesium production comprises a residue crushing unit 1 and a residue treatment unit 2, wherein the residue crushing unit 1 comprises a stone crusher 11, a grid 12, a first conveyor 13, a jaw crusher 14, an eddy current separator 15, a second conveyor 16, a magnesium metal recovery bin 17, a double-layer vibrating screen 18 and a conical crusher 19;
the grating 12 is arranged at the lower layer of the rear end of the stone crusher 11, sieve pores are arranged on the grating 12, and a buffer bin 121 is arranged below the grating 12; the first conveyor 13 is arranged below the outlet of the buffer bin 121; the first conveyor 13 is provided with a magnetic separator 131 for separating and recovering magnetic substances in the slag; the rear end of the first conveyor 13 is provided with a jaw crusher 14; the jaw crusher 14 is connected with an eddy current separator 15 through a second conveyor 16; an outlet I of the eddy current separator 15 is communicated with a metal magnesium recovery bin 17 through a conveying pipe; the outlet two-way of the eddy current separator 15 is connected with a double-layer vibrating screen 18 through a conveying pipe; the slag material on the upper layer vibrating screen 181 is connected with the inlet of the jaw crusher 14 through a third conveyor 182, the slag material on the lower layer vibrating screen 183 enters the conical crusher 19 through a conveying pipe, and the outlet of the conical crusher 19 is connected with the upper layer vibrating screen 181 through the conveying pipe; the slag material screened by the lower layer vibrating screen 183 enters the slag processing unit 2 through a conveying pipe;
the slag processing unit 2 consists of a slag box 21, a continuous stirring tank 22, a reaction tank 23, an ammonia removal purifier 24, a stirring holding tank 25 and a centrifugal filter 26, wherein the slag box 21 is connected with the continuous stirring tank 22 through a conveyor IV 211; the continuous stirring tank 22 is connected with the reaction tank 23 through a mixing pipe 231, and an industrial water supply pipe 232 is arranged on the mixing pipe 231; an ammonia removal purifier 24 is arranged above the reaction tank 23, an air inlet pipe 233 is arranged at the bottom of the reaction tank 23, and the rear end of the reaction tank 23 is connected with a stirring and maintaining tank 25 through a conveying pipe; the stirring and holding tank 25 is connected with a centrifugal filter 26 through a conveying pipe; the slurry discharged from the reaction tank 23 and having lost activity is buffered by the agitation holding tank 25, and a mixture of polymeric aluminum chloride and polyacrylamide is added thereto, and then the mixture is fed to the centrifugal filter 26 to be subjected to solid-liquid separation.
Further, the size of the sieve holes formed in the grating 12 is 150mm.
Further, the grain size of the inlet slag of the jaw crusher 14 is less than 150mm, and the grain size of the outlet slag is less than 25mm.
Further, the grain size of the slag at the inlet and the outlet of the eddy current separator 15 is less than 25mm.
Further, the size of the mesh of the upper layer vibrating screen 181 is 15mm, and the size of the mesh of the lower layer vibrating screen 183 is 2mm.
Furthermore, the particle size of the inlet slag of the conical crusher 19 is smaller than 15mm, and the particle size of the outlet slag is smaller than 2mm.
Further, gas detection alarms are disposed around the reaction tank 23 and the mixing pipe 231.
Further, the ammonia-removing purifier 24 is a biological ammonia-removing purifier.
Compared with the prior art, the invention has the following beneficial effects: the device can recover valuable metal magnesium in the solid waste residue to the maximum extent, and the recovery rate can reach over 86 percent; in addition, the active solid waste residue can be converted into inert harmless substances without reactivity after being processed, and the potential danger of combustible explosive gas hydrogen and the potential environmental pollution problem of harmful gas ammonia are radically eliminated; the device has the advantages of simple operation, high working efficiency, strong solid waste residue treatment capacity, short overhaul period and cost and labor saving; the whole treatment process is reliable, standard and green, and has important guiding and reference significance for standardizing the behaviors of the electrolytic magnesium industry and promoting the high-quality development of the electrolytic magnesium industry in China.
Drawings
FIG. 1 is a schematic structural view of a solid waste residue treatment apparatus in electrolytic magnesium production according to the present invention.
In the figure: 1. a slag crushing unit; 11. a stone crusher; 12. a grid; 121. a buffer bin; 13. a first conveyor; 131. a magnetic separator; 14. a jaw crusher; 15. an eddy current separator; 16. a second conveyor; 17. a metal magnesium recovery bin; 18. a double-layer vibrating screen; 181. an upper layer vibrating screen; 182. a third conveyor; 183. a lower layer vibrating screen; 19. a cone crusher; 21. a slag box; 22. a continuous stirred tank; 23. a reaction tank; 231. a mixing pipe; 232. an industrial water supply pipe; 233. an air inlet pipe; 24. an ammonia removal purifier; 25. a stirring and holding tank; 26. a centrifugal filter.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to the attached figure 1, the invention provides a device for treating solid waste slag in electrolytic magnesium production, which consists of a slag crushing unit 1 and a slag treatment unit 2.
The slag crushing unit 1 comprises a stone crusher 11, a grating 12, a first conveyor 13, a jaw crusher 14, an eddy current separator 15, a second conveyor 16, a metal magnesium recovery bin 17, a double-layer vibrating screen 18 and a conical crusher 19; wherein, the grating 12 is arranged at the lower layer of the rear end of the stone crusher 11, sieve holes with the size of 150mm are arranged on the grating 12, and a buffer bin 121 is arranged below the grating 12; the first conveyor 13 is arranged below the outlet of the buffer bin 121; a magnetic separator 131 is arranged on the first conveyor 13, and a jaw crusher 14 is arranged at the rear end of the first conveyor 13; the jaw crusher 14 is connected with the eddy current separator 15 through a second conveyor 16; an outlet I of the eddy current separator 15 is communicated with a metal magnesium recovery bin 17 through a conveying pipe; an outlet two-way of the eddy current separator 15 is connected with a double-layer vibrating screen 18 through a conveying pipe; the upper-layer vibrating screen 181 is connected with the inlet of the jaw crusher 14 through a third conveyor 182, the upper-layer vibrating screen 183 is connected with the conical crusher 19 through a conveying pipe, the outlet of the conical crusher 19 is connected with the upper-layer vibrating screen 181 through a conveying pipe, and the lower-layer vibrating screen 183 is connected with the lower-layer vibrating screen 181 through a conveying pipe and enters the slag processing unit 2;
the slag processing unit 2 consists of a slag box 21, a continuous stirring tank 22, a reaction tank 23, an ammonia removal purifier 24, a stirring holding tank 25 and a centrifugal filter 26, wherein the slag box 21 is connected with the continuous stirring tank 22 through a fourth conveyor 211; the continuous stirring tank 22 is connected with the reaction tank 23 through a mixing pipe 231, and an industrial water supply pipe 232 is arranged on the mixing pipe 231; an ammonia removal purifier 24 is arranged above the reaction tank 23, an air inlet pipe 233 is arranged at the bottom of the reaction tank 23, and the rear end of the reaction tank 23 is connected with a stirring and maintaining tank 25 through a conveying pipe; the stirring holding tank 25 is connected to a centrifugal filter 26 through a delivery pipe; the slag slurry discharged from the reaction tank 23 and losing activity is buffered by a stirring and maintaining tank 25, and is added with a mixture of polymer polyaluminium chloride and polyacrylamide, and then enters a centrifugal filter 26 for solid-liquid separation, and harmless solid slag separated by the centrifugal filter 26 is sent to a slag field; the wastewater separated by the centrifugal filter 26 is sent to a wastewater centralized treatment plant.
Preferably, the jaw crusher 14 has an inlet slag particle size of less than 150mm and an outlet slag particle size of less than 25mm.
Preferably, the grain size of the slag at the inlet and the outlet of the eddy current separator 15 is less than 25mm.
Preferably, the size of the mesh of the upper layer vibrating screen 181 is 15mm, and the size of the mesh of the lower layer vibrating screen 183 is 2mm.
Preferably, the grain size of the inlet slag of the cone crusher 19 is less than 15mm, and the grain size of the outlet slag is less than 2mm.
Preferably, a gas detection alarm is disposed around the reaction tank 23 and the mixing pipe 231.
Preferably, the ammonia-removing purifier 24 is a biological ammonia-removing purifier.
When the magnesium metal slag crusher is used specifically, solid slag blocks are crushed to be smaller than 150mm by the stone crusher 11, then enter the buffer bin 121 through the grating 12, the slag blocks in the buffer bin 121 enter the jaw crusher 14 through the conveyor I13 below, and during the process, metal magnesium blocks are picked and collected in the metal magnesium recovery bin 17; the magnetic separator 131 on the first conveyor 13 adsorbs the magnetic substances to the magnetic separator 131, and then the magnetic substances are recovered to a recovery box; slag with the particle size of less than 25mm from the jaw crusher 14 enters the eddy current separator 15 through the second conveyor 16; magnesium particles with the particle size of less than 25mm separated from the first outlet of the eddy current separator 15 enter a metal magnesium recovery bin 17, and slag particles with the particle size of less than 25mm separated from the second outlet of the eddy current separator 15 enter a double-layer vibrating screen 18; slag with the grain size of 15-25mm on the upper layer vibrating screen 181 enters a jaw crusher 14 through a third conveyor 182; slag materials with the particle size of 2-15mm on the screen of the lower layer vibrating screen 183 enter the conical crusher 19 through the conveying pipe, and slag materials with the particle size of less than 2mm at the outlet of the conical crusher 19 enter the upper layer vibrating screen 181 through the conveying pipe; slag materials with the particle size smaller than 2mm below the lower layer vibrating screen 183 enter a slag box 21 of the slag processing unit 2 through a conveying pipe;
slag materials with the particle size of less than 2mm after slag crushing enter the continuous stirring tank 22 from the slag box 21 through the conveyor IV 211, are uniformly stirred by the continuous stirring tank 22 and are mixed with industrial water supplied by an industrial water supply pipe 232 in the mixing pipe 231 to form slurry, the slurry enters the reaction tank 23, hydrogen generated in the reaction tank 23 is diluted by air introduced through the air inlet pipe 233, hydrogen aggregation is avoided, the stirring effect of the slurry can be enhanced, and the generated ammonia gas is purified by the biological ammonia removal purifier 24 and is discharged into the atmosphere together with the diluted hydrogen gas through a pipeline; if the generated hydrogen and ammonia exceed the standard, the gas detection alarm around the reaction tank 23 and the mixing pipe 231 gives an alarm to remind an operator to check and process; when the slag is treated in winter, hot air can be used for diluting hydrogen to avoid hydrogen aggregation, and meanwhile, enough temperature is kept in the reaction tank 23 to enhance the degree and speed of reaction, so that active substances in slag slurry are completely eliminated, and the slag is converted into inert harmless substances without reactivity; the slag slurry discharged from the reaction tank 23 and losing activity is buffered by a stirring and maintaining tank 25, a mixture of polymer polyaluminium chloride and polyacrylamide is added, then the mixture enters a centrifugal filter 26 for solid-liquid separation, and harmless solid slag separated by the centrifugal filter 26 is sent to a slag field; the wastewater separated by the centrifugal filter 26 is sent to a wastewater centralized treatment plant.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A solid waste's processing apparatus in electrolytic magnesium production which characterized in that: the device consists of a slag crushing unit (1) and a slag processing unit (2), wherein the slag crushing unit (1) consists of a stone crusher (11), a grating (12), a first conveyor (13), a jaw crusher (14), an eddy current separator (15), a second conveyor (16), a metal magnesium recovery bin (17), a double-layer vibrating screen (18) and a conical crusher (19);
the grating (12) is arranged on the lower layer of the rear end of the stone crusher (11), sieve holes are formed in the grating (12), and a buffer bin (121) is arranged below the grating (12); the first conveyor (13) is arranged below the outlet of the buffer bin (121); a magnetic separator (131) is arranged on the conveyor I (13); the rear end of the first conveyor (13) is provided with a jaw crusher (14); the jaw crusher (14) is connected with the eddy current separator (15) through a second conveyor (16); an outlet I of the eddy current separator (15) is communicated with a metal magnesium recovery bin (17) through a conveying pipe; an outlet two-way of the eddy current separator (15) is connected with a double-layer vibrating screen (18) through a conveying pipe; the slag material on the upper layer of the vibrating screen (181) is connected with the inlet of the jaw crusher (14) through a third conveyor (182), the slag material on the lower layer of the vibrating screen (183) enters the conical crusher (19) through a conveying pipe, and the outlet of the conical crusher (19) is connected with the upper layer of the vibrating screen (181) through the conveying pipe; the slag material under the lower layer vibrating screen (183) enters the slag processing unit (2) through a conveying pipe;
the slag treatment unit (2) consists of a slag box (21), a continuous stirring tank (22), a reaction tank (23), an ammonia removal purifier (24), a stirring holding tank (25) and a centrifugal filter (26), wherein the slag box (21) is connected with the continuous stirring tank (22) through a fourth conveyor (211); the continuous stirring tank (22) is connected with the reaction tank (23) through a mixing pipe (231), and an industrial water supply pipe (232) is arranged on the mixing pipe (231); an ammonia removal purifier (24) is arranged above the reaction tank (23), an air inlet pipe (233) is arranged at the bottom of the reaction tank (23), and the rear end of the reaction tank (23) is connected with a stirring and maintaining tank (25) through a conveying pipe; the stirring and maintaining tank (25) is connected with the centrifugal filter (26) through a conveying pipe; the slag slurry discharged from the reaction tank (23) is buffered by a stirring and maintaining tank (25), and a mixture of polymeric aluminum chloride and polyacrylamide is added, and then the mixture enters a centrifugal filter (26) for solid-liquid separation.
2. The apparatus for treating solid waste residue in electrolytic magnesium production according to claim 1, wherein: the size of the sieve holes formed in the grating (12) is 150mm.
3. The apparatus for treating solid waste residue in electrolytic magnesium production as claimed in claim 1, wherein: the grain size of the slag at the inlet of the jaw crusher (14) is less than 150mm, and the grain size of the slag at the outlet is less than 25mm.
4. The apparatus for treating solid waste residue in electrolytic magnesium production according to claim 1, wherein: the grain size of the slag at the inlet and the outlet of the eddy current separator (15) is less than 25mm.
5. The apparatus for treating solid waste residue in electrolytic magnesium production as claimed in claim 1, wherein: the size of the sieve hole of the upper layer vibrating screen (181) is 15mm, and the size of the sieve hole of the lower layer vibrating screen (183) is 2mm.
6. The apparatus for treating solid waste residue in electrolytic magnesium production as claimed in claim 1, wherein: the grain size of the inlet slag of the conical crusher (19) is less than 15mm, and the grain size of the outlet slag is less than 2mm.
7. The apparatus for treating solid waste residue in electrolytic magnesium production as claimed in claim 1, wherein: and gas detection alarms are arranged around the reaction tank (23) and the mixing pipe (231).
8. The apparatus for treating solid waste residue in electrolytic magnesium production as claimed in claim 1, wherein: the ammonia-removing purifier (24) is a biological ammonia-removing purifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010895797.1A CN112058868B (en) | 2020-08-31 | 2020-08-31 | Solid waste residue processing apparatus in electrolytic magnesium production |
Applications Claiming Priority (1)
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| CN113337722A (en) * | 2021-06-07 | 2021-09-03 | 湖北大瀛复合材料有限公司 | Metal alloy wire smelting waste residue recovery processing equipment |
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