CN105728440A - Aluminum electrolytic cell overhaul dreg harmless treatment system and method - Google Patents
Aluminum electrolytic cell overhaul dreg harmless treatment system and method Download PDFInfo
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- CN105728440A CN105728440A CN201610224385.9A CN201610224385A CN105728440A CN 105728440 A CN105728440 A CN 105728440A CN 201610224385 A CN201610224385 A CN 201610224385A CN 105728440 A CN105728440 A CN 105728440A
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- Prior art keywords
- reaction
- delining
- reaction warehouse
- slag
- agent
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 140
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000002002 slurry Substances 0.000 claims abstract description 49
- 238000002386 leaching Methods 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 95
- 239000002893 slag Substances 0.000 claims description 76
- 239000004411 aluminium Substances 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 42
- 239000000843 powder Substances 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 20
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 12
- 229910052731 fluorine Inorganic materials 0.000 claims description 12
- 239000011737 fluorine Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 5
- ROMMVUMWISCVBE-UHFFFAOYSA-N [F].N#CC#N Chemical compound [F].N#CC#N ROMMVUMWISCVBE-UHFFFAOYSA-N 0.000 claims description 5
- 239000007844 bleaching agent Substances 0.000 claims description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000004155 Chlorine dioxide Substances 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract description 35
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 description 45
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000000945 filler Substances 0.000 description 19
- 239000000463 material Substances 0.000 description 13
- 230000018044 dehydration Effects 0.000 description 10
- 238000006297 dehydration reaction Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- 239000000428 dust Substances 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000012216 screening Methods 0.000 description 7
- 230000005520 electrodynamics Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000000498 ball milling Methods 0.000 description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 229910017083 AlN Inorganic materials 0.000 description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 calcium fluoride Chemical compound 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- JGUQDUKBUKFFRO-UHFFFAOYSA-N chembl3184098 Chemical compound ON=C(C)C(C)=NO JGUQDUKBUKFFRO-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to an aluminum electrolytic cell overhaul dreg harmless treatment system and method and belongs to the technical field of electrolytic aluminum waste treatment. The aluminum electrolytic cell overhaul dreg harmless treatment system comprises a leaching bin used for leaching overhaul dregs and a reaction bin unit connected with the leaching bin and used for carrying out cyanogen removal and fluoride removal treatment. The aluminum electrolytic cell overhaul dreg harmless treatment system comprises the leaching bin and the reaction bin unit, slurry making and slurry leaching can be carried out in the leaching bin, and cyanogen removal and fluoride removal reactions are carried out in the reaction bin unit. The procedures are carried out separately. When one procedure is carried out, the other procedure is not affected and can be carried out simultaneously. Continuous cyanogen removal and fluoride removal treatment can be realized, and the treating efficiency is improved.
Description
Technical field
The present invention relates to a kind of aluminium cell slag from delining innocuity disposal system and processing method, belong to electrolytic aluminium waste gurry processing technology field.
Background technology
Containing cathode block, refractory brick, bundle paste, insulating brick, refractory powder, fire mortar, heat-insulating shield, the metal of infiltration and electrolyte and a small amount of aluminium nitride and cyanide salt in aluminium cell slag from delining, its composition includes 33% carbonaceous material, 30% fluorine-containing material, 34% flame-proof thermal insulation material and other materials on a small quantity by weight percentage, because of its fluoride containing solubility and a small amount of cyanide, it is listed in hazardous waste.The generation amount of aluminium cell slag from delining increases along with the yield of electrolytic aluminium and increases, therefore, it is necessary to carry out harmless treatment.
In traditional processing mode, landfill disposal is the mode that application is more, but this method environmental pollution is serious.In order to avoid environmental pollution, the many employings of domestic aluminium manufacturer are built ne-leakage stacking field and are carried out concentrating stacking, it is reported, current China has more than the electrolytic aluminium waste gurry of 2,000,000 tons and piles up, and these deposits are not only caused by building and safeguard the cost increase stacking place.
nullThe Chinese invention patent (authorized announcement date is on June 10th, 2015) that Authorization Notice No. is CN103239828B discloses a kind of program control、Manual electrolytic aluminium slag from delining hamlessizing technology technique，This technique adopts and adds except cyanogen agent、Electrolytic aluminium slag from delining is carried out harmless treatment by the mode of defluorinating agent，Concrete employing is separately added into except cyanogen agent and defluorinating agent in two agent bins，Slag from delining through broken and deironing is made powder，Add in reaction warehouse，Powder in reaction warehouse is carried out preliminary examination，Detect its cyanide content、Content of fluoride、PH value，Then add appropriate reacting except cyanogen agent according to the content of cyanide and remove cyanogen，Detection concentration of cyanide is qualified less than 0.5mg/L，Content further according to fluoride adds appropriate defluorinating agent and acid，React fluorine removal，To fluoride concentration less than 10mg/L，PH value is qualified when 6-7，Slurry in reaction warehouse is squeezed into Buffer Pool，Slurry in Buffer Pool is squeezed into pressure filter，The water that pressure filter is separated imports to be back in cistern after filter tank filters and reuses，Filter Press dry pug out is the slag from delining after harmless treatment.
The device that the method uses includes A agent bin, B agent bin, acid-regulating tank, reaction warehouse, and wherein A agent bin is connected with reaction warehouse each through conveying worm with B agent bin, and acid-regulating tank is also connected with reaction warehouse.It prepares slurry, slurry leaches and removes cyanogen and fluorine removal process can only carry out in same reaction warehouse, it is unfavorable for processing continuously, can only the capacity in augmenting response storehouse in order to improve treatment effeciency, and it is too much to process slurry in single reaction warehouse, then may result in its except cyanogen fluorine removal reaction uneven, reaction rate declines, and in turn results in treatment effeciency and declines, and therefore this process device is inefficient to electrolytic aluminium slag from delining harmless treatment.Same, its butanedionedioxime is operationally, its slag from delining raw material, it is simultaneously introduced mixing except cyanogen agent, prepare slurry, leaching slurry cannot separate with except cyanogen process, together with raw material, each reactant are mixed in product, affect its reaction efficiency, also lead to its reaction thorough not, reduce treatment effect.
Summary of the invention
It is an object of the invention to provide the aluminium cell slag from delining innocuity disposal system that a kind for the treatment of effeciency is very high, the present invention also aims to provide a kind of aluminium cell slag from delining method for innocent treatment.
In order to realize object above, the technical scheme of the aluminium cell slag from delining innocuity disposal system of the present invention is as follows:
A kind of aluminium cell slag from delining innocuity disposal system, including leaching storehouse for what slag from delining was leached and be connected with described leaching storehouse and for carrying out removing the reaction warehouse unit that cyanogen fluorine removal processes.
The aluminium cell slag from delining innocuity disposal system of the present invention includes turnover storehouse and reaction warehouse unit, slurrying, slurry leaching process can be carried out in leaching storehouse, react except cyanogen and fluorine removal and carry out in reaction warehouse unit, said process is separately performed, while then each process processes, other processing procedure is unaffected, it is possible to carry out simultaneously, the serialization being advantageously implemented processing procedure carries out, and improves treatment effeciency.
Described reaction warehouse unit is connected to add for substep in reaction warehouse unit and adds defluorinating agent and the chemicals dosing plant except cyanogen agent except cyanogen agent and defluorinating agent or substep.This chemicals dosing plant can be a medicating mechanism, can add except cyanogen agent can add again defluorinating agent in reaction warehouse, it is also possible to be two medicating mechanisms, be respectively intended in reaction warehouse unit and add except cyanogen agent and defluorinating agent in reaction warehouse unit.
Described reaction warehouse unit includes the first reaction warehouse, the second reaction warehouse that are sequentially connected, and described first reaction warehouse and the second reaction warehouse are respectively intended to carry out removing cyanogen reaction and fluorine removal reaction or fluorine removal reaction and except cyanogen reaction.This is arranged can be separately performed with fluorine removal reaction by removing cyanogen reaction, cooperate with leaching storehouse, then three storehouses can process three different processes simultaneously, substantially increase treatment effeciency, and one of them processing procedure goes wrong, then only need to being undertaken processing by the material in this storehouse, the material in other storehouses is unaffected.Now, described chemicals dosing plant can be separately added into except cyanogen agent and defluorinating agent or defluorinating agent and remove cyanogen agent by substep in the first reaction warehouse and the second reaction warehouse.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes equipment for separating liquid from solid, and the discharging opening of the second reaction warehouse is connected with the charge door of equipment for separating liquid from solid.Innoxious slurry after final process can be carried out dehydration by this equipment for separating liquid from solid, is focused on by separation slag, it is simple to transport.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes circulating water pool, and the water inlet of circulating water pool is connected with the liquid outlet of equipment for separating liquid from solid.Innoxious slurry filtrate after equipment for separating liquid from solid separates can be collected in circulating water pool, it is simple to is continuing with.For the ease of operation, the outlet of described circulating water pool is connected with the charge door leaching storehouse.The separating medium collected in circulating water pool can add the first reaction warehouse to carry out follow-up slurrying either directly through water pump etc..
Described chemicals dosing plant includes the bale breaker being connected with reaction warehouse unit.Bale breaker is connected with reaction warehouse each through conveying worm, it is simple to the automatization realizing packed reagent feeds in raw material.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes the feeding device being connected with the first reaction warehouse, and feeding device includes disintegrating machine, block storehouse, batcher, ball mill, filler bin.
Being connected to jigging conveyer on disintegrating machine, jigging conveyer is connected to feedstock transportation band, raw material delivers to jigging conveyer through feedstock transportation band, jigging conveyer send into disintegrating machine.Jigging conveyer is provided with deironing apparatus, is used for the iron block removing in raw material.Crusher lower is provided with belt conveyor and rolling screen.
Bottom, block storehouse is provided with batcher, and the discharge end of batcher is connected with the charging aperture of ball mill, carries out powder process in order to the fritter block in block storehouse is delivered to ball mill.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes dust arrester, and the dust collected can be sent into feeding device by dust arrester.
Leach in storehouse, the first reaction warehouse, the second reaction warehouse and be provided with agitator.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes monitor control system.Block storehouse and filler bin top are provided with diffuse-reflectance diastimeter.Diffuse-reflectance diastimeter is in order to detect the height of materials in storehouse, and is scaled the quality of material in storehouse by monitor control system.Leach and storehouse, the first reaction warehouse, the second reaction warehouse, circulating water pool, disintegrating machine, block storehouse, ball mill, bale breaker, pressure filter, feedstock transportation band, jigging conveyer, belt conveyor, mixed dynamic screening machine, conveying worm, dust arrester, the import and export of batcher and connection pipeline between are provided with electrodynamic valve, electrodynamic valve is connected with monitor control system, in order to control the opening and closing of each electrodynamic valve.
Leach on the sidewall of storehouse, the first reaction warehouse, the second reaction warehouse and the bottom of filler bin is provided with sample tap.In order to sample cyanide, content of fluoride or its pH in detection material, in order to control the reinforced amount in reaction warehouse.
The technical scheme of the aluminium cell slag from delining method for innocent treatment of the present invention is as follows:
A kind of aluminium cell slag from delining method for innocent treatment, including:
Slag from delining powder is mixed with water, leaches, obtain leaching slurry, leaching slurry is transferred in reaction vessel；Add except adding defluorinating agent reaction after cyanogen agent reaction, or add except cyanogen agent is reacted after addition defluorinating agent reaction；Solid-liquid separation, to obtain final product.
The aluminium cell slag from delining method for innocent treatment of the present invention by slurrying, slurry leach, except cyanogen process and fluorine removal process separately performed, it is simple to continuous treatment, be also beneficial to each process is individually controlled, treatment effeciency is higher.It addition, the aluminium cell slag from delining method for innocent treatment of the present invention does not use acid, both avoid the corrosion to equipment and the infringement to workers ' health of the issuable acid mist, and the slurry after process is close to neutral, meets emission request.
Described reaction vessel is reaction warehouse unit.
Used except cyanogen agent be one or several in sodium chlorate, bleaching powder, hydrogen peroxide, bleaching powder, chlorine dioxide.These except cyanogen agent be have oxidisability, can by CN-Change into N2Material, it is possible to realize cyanide removal and slip innoxious.
Described defluorinating agent is one or several in calcium chloride, aluminum chloride, magnesium chloride, calcium hydroxide, calcium oxide.Fluorion water miscible in system can be converted into fluoride (such as calcium fluoride, the aluminium fluoride etc.) precipitation of indissoluble by these defluorinating agents, and then removes fluoride.
More than 3 times that amount is slag from delining powder quality of the water mixed with slag from delining powder.In order to improve leaching efficiency, the amount adding water controls 3-5 times for slag from delining powder quality.
The time of described leaching is typically in more than 10min, ensure that the fluoride in slag from delining powder is fully dissolved out.Extraction time is optimized for 10-30min further.It is stirred while leaching, to improve mixing uniformity.
The amount added except cyanogen agent and defluorinating agent can be determined according to the testing result of the cyanide treated in the slurry except the process of cyanogen fluorine removal, content of fluoride.General, the addition of defluorinating agent is as the criterion less than 10mg/L with content of fluoride ion after reaction.Except the addition of cyanogen agent is as the criterion less than 0.5mg/L with cyanide content after reaction.
Addition was determined depending on the concentration of the fluoride in material slag and cyanide except the response time after cyanogen agent or defluorinating agent, and general, the time of reaction is typically in more than 10min, to ensure that reaction is fully.Response time is optimized for 10-30min further, to improve reaction efficiency.
Separating medium after described solid-liquid separation returns preparation and leaches slurry.Concrete, carry out solid-liquid separation to except the mixture obtained after cyanogen fluorine removal end reaction, separating medium mixes with slag from delining powder and reuses.Described solid-liquid separation carries out filter pressing for adopting pressure filter.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the aluminium cell slag from delining innocuity disposal system of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is further detailed.
The slag from delining of the present invention is mainly include refractory brick, prick paste, insulating brick, refractory powder, fire mortar, heat-insulating shield, the metal of infiltration and electrolyte and a small amount of aluminium nitride and cyanide salt.
The embodiment of the aluminium cell slag from delining innocuity disposal system of the present invention:
nullAs shown in Figure 1，The aluminium cell slag from delining innocuity disposal system of the present invention，Including the feeding device being sequentially connected、Leach storehouse 101、Reaction warehouse unit，Also include equipment for separating liquid from solid，Reaction warehouse unit includes the first reaction warehouse 102、Second reaction warehouse 103，Leach the discharging opening in storehouse 101 and the charge door of the first reaction warehouse 102 is connected by pipeline，The discharging opening of the first reaction warehouse 102 and the charge door of the second reaction warehouse 103 are connected by pipeline，Equipment for separating liquid from solid is pressure filter or centrifugal separator，It the present embodiment is plate type pressure filter 201，The discharging opening of the second reaction warehouse 103 is connected with the charge door of plate type pressure filter by pipeline，First reaction warehouse 102 is provided with except cyanogen agent adds entrance，Second reaction warehouse 103 is provided with defluorinating agent and adds entrance，Except cyanogen agent adds, entrance is connected to except cyanogen agent bale breaker 1021 by conveying worm，Defluorinating agent adds and is connected to defluorinating agent bale breaker 1031 by conveying worm on entrance.By the packed bale breaker putting correspondence except cyanogen agent and defluorinating agent, can realize automatically unpacking and adding except cyanogen agent or defluorinating agent in reaction warehouse.
Leach and storehouse the 101, first reaction warehouse the 102, second reaction warehouse 103 is provided with agitating device, it is possible to the material in reaction warehouse is stirred, improve the efficiency of slurrying, leaching or reaction.
The aluminium cell slag from delining innocuity disposal system of the present invention also includes circulating water pool 4, the entrance of circulating water pool is connected by pipeline with the liquid outlet of plate type pressure filter, to be collected by the water after pressure filter separates, the outlet of circulating water pool is connected with the charge door leaching storehouse 101, it is of course also possible to storehouse 101 arranges special filler leaching, and it is connected with the outlet of circulating water pool, the outlet of circulating water pool can pass through water pump or other water plugs are connected, to improve water-injection efficiency.
The pipeline that leaching storehouse the 101, first reaction warehouse the 102, second reaction warehouse 103 and reaction warehouse are connected with pressure filter is provided with Pulp pump 104, in order to improve the transfer efficiency of slurry.
nullFeeding device includes disintegrating machine 304、Block storehouse 308、Batcher 309、Ball mill 306、Filler bin 307，Disintegrating machine is connected to jigging conveyer 302，Jigging conveyer is connected to feedstock transportation band 301，Raw material delivers to jigging conveyer through feedstock transportation band，Disintegrating machine is sent into by jigging conveyer，Jigging conveyer is provided with deironing apparatus 303，It is used for the iron block removing in raw material，Disintegrating machine is box disintegrating machine，Crusher lower is provided with belt conveyor 305 and rolling screen 306，Rolling screen for carry with sieving approach after block and foreign material can be removed，Screening to block is to mix other refuses such as woven bag in the feed、Vials etc. are separated from block，Rolling screen is connected with block storehouse by the first elevator 307，It is delivered to block storehouse in order to the block after being sieved by rolling screen，Bottom, block storehouse is provided with batcher 309，The discharge end of batcher is connected with the charging aperture of ball mill，Powder process is carried out in order to the block in block storehouse is delivered to ball mill，Batcher in the present embodiment is electromagnetic feeder；Being provided with bistrique sieve on ball mill, ball mill is connected to the 3rd conveying worm, the 3rd conveying worm is connected to the second elevator 310, the second elevator is connected with filler bin, and filler bin is connected with leaching storehouse 101 by the 3rd elevator 311.Feedstock transportation band, jigging conveyer, disintegrating machine, block storehouse, batcher, ball mill, filler bin constitute conveying circuit.
Being connected to the first conveying worm on first elevator, the first conveying worm is connected to the first cleaner unit 312, the dust that the first cleaner unit is collected sends into the first elevator through conveying worm；Being connected to the second conveying worm on 3rd conveying worm, the second conveying worm is connected to the second cleaner unit 313, the dust that the second cleaner unit is collected sends into the 3rd conveying worm through the second conveying worm.The aluminium electrolytic carbon slag of the present embodiment reclaims cryolite system and also includes cleaning shaft, jigging conveyer, disintegrating machine, belt conveyor, electromagnetic feeder, ball mill, leaching storehouse 101, reaction warehouse 102 are all connected with cleaning shaft, first cleaner unit, the second cleaner unit are also connected with cleaning shaft 314, and the dust-free air after cleaner unit processes sends into smoke stack emission to air through blower fan 315.
First elevator, the second elevator, the 3rd elevator can be all elevator of the prior art, are bucket elevator in the present embodiment.First cleaner unit, the second cleaner unit can be all cleaner unit of the prior art, are pulse dust collector in the present embodiment.
Block storehouse and filler bin top are provided with diffuse-reflectance diastimeter, in order to detect the height of materials in storehouse, and are scaled the quality of material in storehouse by monitor control system.Leach and storehouse the 101, first reaction warehouse the 102, second reaction warehouse 103, circulating water pool, disintegrating machine, block storehouse, ball mill, bale breaker, pressure filter, belt conveyor, rolling screen, conveying worm, cleaner unit, elevator, the import and export of batcher and connection pipeline between are provided with electrodynamic valve, electrodynamic valve is connected with monitor control system, in order to control the opening and closing of each electrodynamic valve.
Leach on the sidewall of storehouse the 101, first reaction warehouse the 102, second reaction warehouse 103 and the bottom of filler bin is provided with sample tap, in order to sample detection, predominantly detect the pH value of cyanide, content of fluoride and slip.
The aluminium cell slag from delining innocuity disposal system of the present embodiment also includes temperature control system, and temperature control system includes being separately positioned on the temperature feeler lever leached in the 101, first reaction warehouse the 102, second reaction warehouse 103 of storehouse and heater and coupled temperature controller.
In use, aluminium cell slag from delining enters block storehouse to the aluminium cell slag from delining innocuity disposal system of the present embodiment after crusher in crushing, screening, sends into ball mill ball milling powder process through batcher, and is sent into filler bin by elevator.The dust collected in first cleaner unit, the second cleaner unit is respectively fed to elevator and the conveying worm of correspondence.Slag from delining powder enters and leaches storehouse, and slurrying is leached, slurry enters the first reaction warehouse, adds except cyanogen agent, stirring reaction by bale breaker in the first reaction warehouse, carry out removing cyanogen to process, then reacted slurry is sent into the second reaction warehouse, in the second reaction warehouse, add defluorinating agent, stirring reaction by bale breaker, carry out fluorine removal process, reacted slurry being passed into plate type pressure filter and carries out dehydration, the slag from delining that filtering residue has been innoxious, filtrate sends into circulating water pool recycling.
In other embodiments of the aluminium cell slag from delining innocuity disposal system of the present invention, the first reaction warehouse arranges defluorinating agent and adds entrance, the second reaction warehouse is provided with except cyanogen agent adds entrance, namely first carry out fluorine removal process and carry out again removing cyanogen process.
In other embodiments, the outlet of circulating water pool is not connected with the charge door leaching storehouse 101, carries out other mode process after the filtrate collection that final filtration obtains, and the water that leaching needs in storehouse 101 adds by other means.In other embodiments, the discharging opening of the second reaction warehouse is not connected to equipment for separating liquid from solid, directly the slip after harmless treatment is transported and process, now also without arranging circulating water pool.
In other embodiments, add entrance except cyanogen agent and defluorinating agent adds and is not connected to bale breaker on entrance, but is added in corresponding reaction warehouse by belt conveyor and remove cyanogen agent or defluorinating agent.In other embodiments, it is provided above agent bin at corresponding reaction warehouse, defluorinating agent and except cyanogen agent is by corresponding defluorinating agent agent bin with except cyanogen agent agent bin feeds in raw material in reaction warehouse, do not use bale breaker to carry out unpacking reinforced.
In other embodiments, depending on the granule situation of slag from delining raw material, feeding device can not include one in disintegrating machine or ball mill.In other embodiments, aluminium cell slag from delining innocuity disposal system can not include cleaner unit, cleaning shaft, deironing apparatus.
The embodiment of the aluminium cell slag from delining method for innocent treatment of the present invention:
Embodiment 1
The method reclaiming calcium fluoride from aluminium cell slag from delining of the present embodiment comprises the steps:
1) slag from delining raw material is delivered to jigging conveyer through feedstock transportation band, deironing apparatus on jigging conveyer removes the iron block in raw material, sent into disintegrating machine by jigging conveyer to crush, raw material block after broken is screened, diameter is not more than the boosted machine of fritter raw material of 20mm and sends into block storehouse, and the diameter bulk raw more than 20mm is sent disintegrating machine back to and continued broken；Fritter raw material in block storehouse carries out ball milling through electro-vibrating feeder feeding ball mill and makes raw material fine powder, screening, sift out the raw material fine powder after the impurity such as aluminium block, iron block and be delivered to the first elevator through the first conveying worm, the first elevator promote and send into filler bin；
2) adding water in storehouse leaching, sent into by the raw material fine powder in filler bin and leach in storehouse, the mass ratio of raw material fine powder and water is 1:3, and leaching 30min must leach slurry so that it is in soluble fluoride and cyanide be fully dissolved out；
3) step 2) in leaching slurry send in the first reaction warehouse, then add except cyanogen agent sodium chlorate in the first reaction warehouse, stirring reaction 10min, remove cyanide therein；Except the addition of cyanogen agent is as the criterion less than 0.5mg/L to react cyanide content in disposed slurry；
4) slurry after removing cyanide in step 3) is sent in the second reaction warehouse, in the second reaction warehouse, add defluorinating agent calcium chloride, stirring reaction 10min, remove fluoride therein；The addition of defluorinating agent is as the criterion less than 10mg/L to react content of fluoride in disposed slurry；
5) send into plate type pressure filter carry out dehydration by step 4) remove the slurry after fluoride, the filtering residue after dehydration be innoxious after slag from delining, filtrate is sent into circulating water pool and is collected, and passes in leaching storehouse and be circulated utilization.
Slag from delining after innoxious is detected, and its cyanide content is lower than 0.05mg/L, and content of fluoride is 8.33mg/L.
Embodiment 2
The method reclaiming calcium fluoride from aluminium cell slag from delining of the present embodiment comprises the steps:
1) slag from delining raw material is delivered to jigging conveyer through feedstock transportation band, deironing apparatus on jigging conveyer removes the iron block in raw material, sent into disintegrating machine by jigging conveyer to crush, raw material block after broken is screened, diameter is not more than the boosted machine of fritter raw material of 20mm and sends into block storehouse, and the diameter bulk raw more than 20mm is sent disintegrating machine back to and continued broken；Fritter raw material in block storehouse carries out ball milling through electro-vibrating feeder feeding ball mill and makes raw material fine powder, screening, sift out the raw material fine powder after the impurity such as aluminium block, iron block and be delivered to the first elevator through the first conveying worm, the first elevator promote and send into filler bin；
2) adding water in storehouse leaching, sent into by the raw material fine powder in filler bin and leach in storehouse, the mass ratio of raw material fine powder and water is 1:5, and leaching 10min must leach slurry so that it is in soluble fluoride and cyanide be fully dissolved out；
3) step 2) in leaching slurry send in the first reaction warehouse, then add except cyanogen agent hydrogen peroxide in the first reaction warehouse, stirring reaction 30min, remove cyanide therein；Except the addition of cyanogen agent is as the criterion less than 0.5mg/L to react cyanide content in disposed slurry；
4) slurry after removing cyanide in step 3) is sent in the second reaction warehouse, in the second reaction warehouse, add defluorinating agent calcium hydroxide, stirring reaction 30min, remove fluoride therein；The addition of defluorinating agent is as the criterion less than 10mg/L to react content of fluoride in disposed slurry；
5) send into plate type pressure filter carry out dehydration by step 4) remove the slurry after fluoride, the filtering residue after dehydration be innoxious after slag from delining, filtrate is sent into circulating water pool and is collected, and passes in leaching storehouse and be circulated utilization.
Slag from delining after innoxious is detected, and its cyanide content is lower than 0.05mg/L, and content of fluoride is 5.96mg/L.
Embodiment 3
The method reclaiming calcium fluoride from aluminium cell slag from delining of the present embodiment comprises the steps:
1) slag from delining raw material is delivered to jigging conveyer through feedstock transportation band, deironing apparatus on jigging conveyer removes the iron block in raw material, sent into disintegrating machine by jigging conveyer to crush, raw material block after broken is screened, diameter is not more than the boosted machine of fritter raw material of 20mm and sends into block storehouse, and the diameter bulk raw more than 20mm is sent disintegrating machine back to and continued broken；Fritter raw material in block storehouse carries out ball milling through electro-vibrating feeder feeding ball mill and makes raw material fine powder, screening, sift out the raw material fine powder after the impurity such as aluminium block, iron block and be delivered to the first elevator through the first conveying worm, the first elevator promote and send into filler bin；
2) adding water in storehouse leaching, sent into by the raw material fine powder in filler bin and leach in storehouse, the mass ratio of raw material fine powder and water is 1:4, and leaching 20min must leach slurry so that it is in soluble fluoride and cyanide be fully dissolved out；
3) step 2) in leaching slurry send in the first reaction warehouse, then add except cyanogen agent chlorine dioxide in the first reaction warehouse, stirring reaction 20min, remove cyanide therein；Except the addition of cyanogen agent is as the criterion less than 0.5mg/L to react cyanide content in disposed slurry；
4) slurry after removing cyanide in step 3) is sent in the second reaction warehouse, in the second reaction warehouse, add defluorinating agent calcium oxide, stirring reaction 20min, remove fluoride therein；The addition of defluorinating agent is as the criterion less than 10mg/L to react content of fluoride in disposed slurry；
5) send into plate type pressure filter carry out dehydration by step 4) remove the slurry after fluoride, the filtering residue after dehydration be innoxious after slag from delining, filtrate is sent into circulating water pool and is collected, and passes in leaching storehouse and be circulated utilization.
Slag from delining after innoxious is detected, and its cyanide content is lower than 0.05mg/L, and content of fluoride is 7.45mg/L.
Embodiment 4
The method reclaiming calcium fluoride from aluminium cell slag from delining of the present embodiment comprises the steps:
1) slag from delining raw material is delivered to jigging conveyer through feedstock transportation band, deironing apparatus on jigging conveyer removes the iron block in raw material, sent into disintegrating machine by jigging conveyer to crush, raw material block after broken is screened, diameter is not more than the boosted machine of fritter raw material of 20mm and sends into block storehouse, and the diameter bulk raw more than 20mm is sent disintegrating machine back to and continued broken；Fritter raw material in block storehouse carries out ball milling through electro-vibrating feeder feeding ball mill and makes raw material fine powder, screening, sift out the raw material fine powder after the impurity such as aluminium block, iron block and be delivered to the first elevator through the first conveying worm, the first elevator promote and send into filler bin；
2) adding water in storehouse leaching, sent into by the raw material fine powder in filler bin and leach in storehouse, the mass ratio of raw material fine powder and water is 1:4, and leaching 20min must leach slurry so that it is in soluble fluoride and cyanide be fully dissolved out；
3) step 2) in leaching slurry send in the first reaction warehouse, then add except cyanogen agent bleaching powder in the first reaction warehouse, stirring reaction 20min, remove cyanide therein；Except the addition of cyanogen agent is as the criterion less than 0.5mg/L to react cyanide content in disposed slurry；
4) slurry after removing cyanide in step 3) is sent in the second reaction warehouse, in the second reaction warehouse, add defluorinating agent aluminum chloride, stirring reaction 20min, remove fluoride therein；The addition of defluorinating agent is as the criterion less than 10mg/L to react content of fluoride in disposed slurry；
5) send into plate type pressure filter carry out dehydration by step 4) remove the slurry after fluoride, the filtering residue after dehydration be innoxious after slag from delining, filtrate is sent into circulating water pool and is collected, and passes in leaching storehouse and be circulated utilization.
Slag from delining after innoxious is detected, and its cyanide content is lower than 0.05mg/L, and content of fluoride is 6.42mg/L.
Embodiment 5
The present embodiment and the difference is that only of embodiment 1 first add defluorinating agent, after add except cyanogen agent.
Embodiment 6
The present embodiment and the difference is that only of embodiment 2 first add defluorinating agent, after add except cyanogen agent.
Embodiment 7
The present embodiment and the difference is that only of embodiment 3 first add defluorinating agent, after add except cyanogen agent.
Claims (10)
1. an aluminium cell slag from delining innocuity disposal system, it is characterised in that include leaching storehouse for what slag from delining was leached and being connected with described leaching storehouse and for carrying out removing the reaction warehouse unit that cyanogen fluorine removal processes.
2. aluminium cell slag from delining innocuity disposal system as claimed in claim 1, it is characterised in that be connected on described reaction warehouse unit and add except cyanogen agent and defluorinating agent for substep in reaction warehouse unit or add defluorinating agent and the chemicals dosing plant except cyanogen agent step by step.
3. aluminium cell slag from delining innocuity disposal system as claimed in claim 1, it is characterized in that, what described reaction warehouse unit included being sequentially connected the first reaction warehouse, the second reaction warehouse, described first reaction warehouse and the second reaction warehouse are respectively intended to carry out removing cyanogen reaction and fluorine removal reaction or fluorine removal reaction and except cyanogen reaction.
4. the aluminium cell slag from delining innocuity disposal system as described in claim 1-3 any one, it is characterised in that also including equipment for separating liquid from solid, the discharging opening of the second reaction warehouse is connected with the charge door of equipment for separating liquid from solid.
5. aluminium cell slag from delining innocuity disposal system as claimed in claim 4, it is characterised in that also including circulating water pool, the water inlet of circulating water pool is connected with the liquid outlet of equipment for separating liquid from solid.
6. aluminium cell slag from delining innocuity disposal system as claimed in claim 5, it is characterised in that the outlet of circulating water pool is connected with the charge door leaching storehouse.
7. aluminium cell slag from delining innocuity disposal system as claimed in claim 2, it is characterised in that described chemicals dosing plant includes the bale breaker being connected with reaction warehouse unit.
8. an aluminium cell slag from delining method for innocent treatment, it is characterised in that including:
Slag from delining powder is mixed with water, leaches, obtain leaching slurry, leaching slurry is transferred in reaction vessel；Add except adding defluorinating agent reaction after cyanogen agent reaction, or add except cyanogen agent is reacted after addition defluorinating agent reaction；Solid-liquid separation, to obtain final product.
9. aluminium cell slag from delining method for innocent treatment as claimed in claim 8, it is characterised in that used except cyanogen agent be one or several in sodium chlorate, bleaching powder, hydrogen peroxide, bleaching powder, chlorine dioxide；Described defluorinating agent is one or several in calcium chloride, aluminum chloride, magnesium chloride, calcium hydroxide, calcium oxide.
10. aluminium cell slag from delining method for innocent treatment as claimed in claim 8, it is characterised in that the separating medium after described solid-liquid separation returns preparation and leaches slurry.
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