CN204866824U - Aluminium cell overhaul sediment resource innocent treatment system - Google Patents
Aluminium cell overhaul sediment resource innocent treatment system Download PDFInfo
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- CN204866824U CN204866824U CN201520573304.7U CN201520573304U CN204866824U CN 204866824 U CN204866824 U CN 204866824U CN 201520573304 U CN201520573304 U CN 201520573304U CN 204866824 U CN204866824 U CN 204866824U
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Abstract
The utility model discloses an aluminium cell overhaul sediment resource innocent treatment system, including initial response storehouse, second reaction storehouse, third response storehouse, alkali lye storehouse, flotation unit and solid -liquid separation equipment, the initial response storehouse is connected with the alkali lye storehouse through the aspiration pump, and the thick liquids in initial response storehouse export and are connected with the import of flotation unit, the thick liquids export in the export of the bottom mud of flotation unit, second reaction storehouse, the thick liquids export in third response storehouse are connected with solid -liquid separation equipment's import respectively, and solid -liquid separation equipment's liquid outlet is connected with the feed inlet in second reaction storehouse, the feed inlet in third response storehouse respectively, and the top layer mud export of flotation unit is connected with the feed inlet in third response storehouse. This system can extract out wherein ice crystal and aluminium ion on removing cyanogen defluorination innocent treatment's basis to aluminium cell overhaul sediment, realized the resourceization, has extensive industrialization application prospect.
Description
Technical field
The utility model belongs to electrolytic aluminium fixed-end forces technical field, is specifically related to a kind of aluminium cell slag from delining resource innocuity disposal system.
Background technology
The Aluminum Electrolysis Production of China is started in the 1950's, and through the development of decades, aluminum electrolysis technology obtains significant progress, and Chinese large prebaked cell for aluminum-reduction design level and Aluminum Electrolysis Production technology management level reach advanced international standard.At present, aluminum electrolysis industry mainly adopts cryolite-alumina fused salt electrolysis process, using molten cryolitic as solvent, aluminium oxide is as solute, using carbon body as anode, aluminium liquid as negative electrode, after passing into powerful direct current, under 950 DEG C ~ 970 DEG C conditions, the two poles of the earth in electrolytic cell are carried out electrochemical reaction and obtain fine aluminium.
Electrolytic cell is the key equipment of Aluminum Electrolysis Production, because the wettability of carbon anode/cathode to electrolyte fused salt is better, cathode inner lining is inevitably subject to electrolyte, the etch of aluminium liquid etc., the liner of electrolytic cell is destroyed, therefore the life-span of aluminium cell generally only have 2 ~ 5 years, need regularly to carry out maintenance and more conversion materials, its slag from delining main component of replacing is some useless cloudy (sun) pole charcoal blocks, refractory material and barrier material, comprising a large amount of ice crystal, ice crystal is as the flux of electrolytic aluminium, there is important resource reclaim be worth, and fluoride and cyanide are all listed in hazardous solid waste list by national environmental protection supervision department.
At present, the aluminium cell slag from delining that China's aluminum electrolysis industry produces every year is about 250,000 tons, and have the accumulation of more than 200 ten thousand tons to store up, major part aluminium manufacturer does not also carry out disposal and recovery effectively to these slag from delining and utilizes, air storage or the process of soil-burial mode of Anti-seeping technology were done in main employing, this not only will take a large amount of soils, causes the wasting of resources, and its airborne dust also can major polluting atmosphere environment.Meanwhile, the fluoride in slag from delining and cyanide are water-soluble, if arbitrarily abandoned by slag from delining, the fluoride made wherein and cyanide are flowed into rivers with rainwater, infiltrate soil and groundwater, all cause severe contamination to surrounding environment, soil and groundwater.
In prior art, be no lack of the research having and aluminium cell slag from delining is carried out to prevention and cure of pollution process, such as adopt magnetic method separating ferrum, due to slag from delining complicated components, common magnetic separator poor effect, and the equipment investment of gradient magnetic separation or superconducting magnetic separation is huge, energy consumption and cost high; And for example adopt pyrogenic process to carry out harmless treatment, slag from delining is placed in fluid bed, adds sulfate, pass into oxygen high-temp combustion decompose cyanide, this technique relates to secondary pollution, and to equipment and materials and sealing requirements higher, operating cost is also higher, is difficult to industrially promote the use of.
In prior art, CN103239828B discloses a kind of program control, manual electrolytic aluminium slag from delining hamlessizing technology technique, comprising: deliver in reaction warehouse by slag from delining powder; Slag from delining powder carries out preliminary examination, draws the content of cyanide in slag from delining powder, the content of fluoride and pH value; Open the conveying worm that A agent bin is connected with reaction warehouse, will join in reaction warehouse except cyanogen agent, hybrid reaction, it is qualified that detection concentration of cyanide is less than 0.5mg/L; The amount of the defluorinating agent added in B agent bin is needed according to the cubage detecting the fluoride obtained, start the sour pump on acid delivering pipeline simultaneously, from acid storage tank, acid solution is pumped into acid-regulating tank, the acid of dilution is imported in reaction warehouse by the valve of acid-regulating tank bottom, stirring reaction, be less than 10mg/L to fluoride concentration, pH value is qualified when 6-7; Slurry in reaction warehouse is squeezed into Buffer Pool, slurry in Buffer Pool is squeezed into filter press, the water that filter press is separated is back in cistern after importing lautertuns filtration and reuses, and Filter Press dry pug is out fallen into below filter press and transported in dumper.System in this technique achieves and adds except cyanogen agent and defluorinating agent in slag from delining slurry, thus realizes the harmless treatment of aluminium cell slag from delining.But containing a large amount of ice crystals in electrolytic cell overhaul slag, this system is when carrying out innoxious, and a large amount of ice crystals contained by slag from delining are taken as refuse process, cause great waste.
Summary of the invention
The purpose of this utility model is to provide a kind of aluminium cell slag from delining resource innocuity disposal system, aluminium cell slag from delining is being carried out except cyanogen is except on the basis of fluorine harmless treatment, extract ice crystal wherein and aluminium ion is recycled, achieve the object of resource.
In order to realize above object, the technical scheme that the utility model adopts is:
A kind of aluminium cell slag from delining resource innocuity disposal system, comprise the first reaction warehouse, the second reaction warehouse, the 3rd reaction warehouse, alkali lye storehouse, flotation unit and equipment for separating liquid from solid, the top of described first reaction warehouse is provided with charge door, the gas vent of the first reaction warehouse is connected through the bottom gas inlet of aspiration pump with described alkali lye storehouse, and the slurry outlet of the first reaction warehouse is connected with the import of described flotation unit; Described flotation unit is provided with top layer slurry outlet and bottom mud outlet, the bottom mud outlet of flotation unit, the slurry outlet of the second reaction warehouse, the slurry outlet of the 3rd reaction warehouse are connected with the import of described equipment for separating liquid from solid respectively, the liquid outlet of described equipment for separating liquid from solid is connected with the charging aperture of described second reaction warehouse, the charging aperture of the 3rd reaction warehouse respectively, and the top layer slurry outlet of flotation unit is connected with the charging aperture of the 3rd reaction warehouse; Described second reaction warehouse is also provided with aluminium removal import, the 3rd reaction warehouse is also provided with defluorinating agent import.
Described aluminium cell slag from delining resource innocuity disposal system, also comprises except cyanogen agent storehouse, aluminium removal storehouse and defluorinating agent storehouse, and the upper gas outlet in described alkali lye storehouse is connected with the described bottom gas inlet except cyanogen agent storehouse through aspiration pump; The outlet at bottom in described aluminium removal storehouse is connected with the aluminium removal import of the second reaction warehouse, and the outlet at bottom in described defluorinating agent storehouse is connected with the defluorinating agent import of the 3rd reaction warehouse.
Also be provided with the first stirring pool between described flotation unit and equipment for separating liquid from solid, the bottom mud outlet of described flotation unit is connected with the import of described first stirring pool, and the outlet of the first stirring pool is connected with the import of described equipment for separating liquid from solid; Also be provided with the second stirring pool between described flotation unit and the 3rd reaction warehouse, the top layer slurry outlet of described flotation unit is connected with the import of the second stirring pool, and the outlet of the second stirring pool is connected with the charging aperture of described 3rd reaction warehouse.
Described equipment for separating liquid from solid is filter-pressing device, described filter-pressing device comprises the first filter-pressing device, the second filter-pressing device and the 3rd filter-pressing device, the bottom mud outlet of described flotation unit is connected with the import of the first filter-pressing device, and the liquid outlet of the first filter-pressing device is connected with the charging aperture of the second reaction warehouse; The slurry outlet of described second reaction warehouse is connected with the import of the second filter-pressing device, and the liquid outlet of the second filter-pressing device is connected with the charging aperture of the 3rd reaction warehouse; The slurry outlet of described 3rd reaction warehouse is connected with the import of the 3rd filter-pressing device.
Described aluminium cell slag from delining resource innocuity disposal system, also comprise grinding device, described grinding device comprises raw material cabin, disintegrating machine, first filler bin, ball mill and the second filler bin, described raw material cabin is connected with described disintegrating machine by batcher, described disintegrating machine is connected with described first filler bin by the first elevator, described first filler bin is connected with described ball mill by batcher, described ball mill is connected with described second filler bin by the second elevator, the outlet of described second filler bin is successively through conveying worm, 3rd elevator is connected with the charging aperture of described first reaction warehouse.The effect of grinding device is the powder becoming to need by the pulverizing of overhaul clinker material, ball milling.
In described grinding device, disintegrating machine and ball mill are provided with dust cover.Raw material cabin top, batcher are all connected with deduster by cleaning shaft with disintegrating machine junction, and the outlet of deduster is connected with chimney by blower fan.The top of the first filler bin and the second filler bin is equipped with single-machine dust remover.The top of raw material cabin, the first filler bin, the second filler bin is equipped with diffuse reflection rangefinder, for controlling the height of material in storehouse.
Described aluminium cell slag from delining resource innocuity disposal system, also comprise cistern and acid storage tank, described cistern is connected, for supplying water to prepare corresponding liquid medicine in above-mentioned medicament storehouse with alkali lye storehouse, except cyanogen agent storehouse, aluminium removal storehouse, defluorinating agent storehouse respectively; Described cistern is also connected with the first reaction warehouse, the second reaction warehouse, the 3rd reaction warehouse, for preparing or regulate the solid-to-liquid ratio of slurry in reaction warehouse; Described acid storage tank is connected with the first reaction warehouse, for preparing the acid solution that acidleach needs.
In aluminium cell slag from delining resource innocuity disposal system of the present utility model, first, second, third reaction warehouse is equipped with temperature regulating device, and inside is equipped with agitator and temperature feeler lever; Reaction warehouse is also provided with sample tap, and sample tap is connected with on-line monitoring system, specifies the concentration of ion in automatic detection reaction storehouse.The pipeline that aluminium removal storehouse, defluorinating agent storehouse and corresponding reaction warehouse connect also is provided with pump, control valve and flowmeter, for controlling the addition of medicament.In treatment system of the present utility model, each bin and flotation unit inside all adopt epoxy glass laminate as inner wall anti-corrosive; The import and export of each equipment and connecting pipe all arrange magnetic valve, and the opening and closing of each magnetic valve controls by on-line monitoring system; Pipeline between the medicament storehouse (alkali lye storehouse, aluminium removal storehouse, defluorinating agent storehouse) that each reaction warehouse is corresponding with it is equipped with check valve, each reaction warehouse, pipeline between medicament storehouse and cistern are equipped with check valve, and the pipeline between reaction warehouse and flotation unit is provided with check valve.In treatment system of the present utility model, described filter-pressing device is filter press, preferred plate type pressure filter; Described disintegrating machine is jaw crusher.
Aluminium cell slag from delining is electrolytic aluminium factory electrolytic cell waste lining, and its composition comprises 33% carbonaceous material, 30% fluorine-containing material, 34% flame-proof thermal insulation material (being mainly aluminium oxide) and a small amount of other materials (aluminium carbide, aluminium nitride and alfer etc.) by weight percentage.Electrolytic cell overhaul slag resource innocuity disposal system of the present utility model, aluminium cell slag from delining is being carried out except cyanogen removes on the basis of the harmless treatment of fluorine, carbonaceous material in slag from delining is passed through FLOTATION SEPARATION, reclaim ice crystal in fluorine-containing material as regenerated resources, remaining fluoride and cyanide make qualified discharge after harmless treatment.
Aluminium cell slag from delining resource innocuity disposal system of the present utility model, during use, slag from delining powder and sulfuric acid mix and carry out acidleach in the first reaction warehouse, (to be bled generation by aspiration pump) under insulation and negative pressure state, hydrogen cyanide in system is overflowed with the form of gas, enters in the sodium hydroxide solution in alkali lye storehouse and absorbs; In first reaction warehouse, remaining slurry enters flotation unit and carries out flotation, bottom mud after flotation is after equipment for separating liquid from solid process, and gained solid is thick ice crystal, and gained liquid enters the second reaction warehouse, add aluminium removal to react, after equipment for separating liquid from solid process delivered to by the slurry of formation.Gained solid is thick aluminium hydroxide, and gained liquid enters the 3rd reaction warehouse, adds defluorinating agent and reacts, and after equipment for separating liquid from solid process delivered to by the slurry of formation, gained solid obtains harmless treatment, and gained liquid can be recycled; Top layer mud after flotation unit flotation enters the 3rd reaction warehouse, adds defluorinating agent and reacts, and after equipment for separating liquid from solid process delivered to by the slurry of formation, gained solid obtains harmless treatment, and gained liquid can be recycled.This system is being carried out except on the basis of cyanogen except the harmless treatment of fluorine to aluminium cell slag from delining, can extract ice crystal in slag from delining and aluminium ion is recycled, and achieves the object of resource, has industrial applications prospect widely.
In this system, first carried out except cyanogen before flotation, avoid volatile hypertoxic gas cyaniding hydrogen that cyanide and sulfuric acid reaction in acidleach process produce when follow-up flotation because equipment air-tightness does not produce pernicious gas loss by force, reduce the difficulty of process.
Further, except cyanogen agent storehouse, aluminium removal storehouse and defluorinating agent storehouse are respectively used to hold except cyanogen agent, aluminium removal, defluorinating agent, it is connected with corresponding reaction warehouse respectively, the addition of automatic gauge medicament, easy to use.The first stirring pool is also provided with between flotation unit and equipment for separating liquid from solid, the second stirring pool is also provided with between flotation unit and the 3rd reaction warehouse, stirring pool plays cushioning effect in systems in which, mud enters corresponding stirring pool and stops stirring, facilitate the pool process of follow-up equipment for separating liquid from solid (filter-pressing device), flexible operating, does not interfere with each other.Equipment for separating liquid from solid comprises the first filter-pressing device, the second filter-pressing device and the 3rd filter-pressing device, carries out press filtration process respectively, improve the treatment effeciency of system to different slurries.
Accompanying drawing explanation
Fig. 1 is the structural representation of the aluminium cell slag from delining resource innocuity disposal system of embodiment 1.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is further described.
Embodiment 1
The aluminium cell slag from delining resource innocuity disposal system of the present embodiment, as shown in Figure 1, comprise grinding device, the first reaction warehouse 20, second reaction warehouse 21, the 3rd reaction warehouse 22, alkali lye storehouse 16, except cyanogen agent storehouse 17, aluminium removal storehouse 18, defluorinating agent storehouse 19, flotation unit, equipment for separating liquid from solid, the first stirring pool 24, second stirring pool 25, acid storage tank 26 and cistern 27; Described flotation unit is flotation device 23, and described equipment for separating liquid from solid is filter press 29;
Described grinding device comprises raw material cabin 1, disintegrating machine 3, first filler bin 6, ball mill 8 and the second filler bin 13, described raw material cabin 1 is connected with described disintegrating machine 3 by batcher 2, described disintegrating machine 3 is connected with described first filler bin 6 by the first elevator 4, described first filler bin 6 is connected with described ball mill 8 by electronic measurement batcher 7, described ball mill 8 is connected with described second filler bin 13 by the second elevator 12, the outlet of described second filler bin 13 is successively through conveying worm 14, the charging aperture that 3rd elevator 15 is arranged with described first reaction warehouse 20 top is connected,
Top, the batcher 2 of raw material cabin 1 are all connected with deduster 9 by cleaning shaft with disintegrating machine 3 junction, dust collection for being produced by above-mentioned zone carries out dust removal process to deduster 9, the outlet of deduster 9 is connected with chimney 11 by blower fan 10, and the gas after deduster 9 processes is delivered to chimney 11 through blower fan 10 and is disposed to air; The top of described first filler bin 6, second filler bin 13 is respectively equipped with single-machine dust remover 5, for reducing dust loss, prevents dust in storehouse from entering air; Described disintegrating machine 3 and ball mill 8 are equipped with for being closed with the blimp reducing noise, to improve working environment and to reduce the impact on nearby residents life; The bottom of described second filler bin 13 is provided with the sample tap of band valve, for carrying out sampling preliminary examination to slag from delining powder;
The gas vent of described first reaction warehouse 20 is connected through the bottom gas inlet of aspiration pump with described alkali lye storehouse 16, the effect of aspiration pump makes to keep negative pressure state in the first reaction warehouse 20, and be delivered in alkali lye storehouse 16 by the hydrogen cyanide gas produced in the first reaction warehouse 20; The upper gas outlet in described alkali lye storehouse 16 is connected with the described bottom gas inlet except cyanogen agent storehouse 17 through aspiration pump, and the gas for being failed to absorb completely by alkaline solution in alkali lye storehouse 16 imports to be removed with carrying out absorption except cyanogen agent solution except in cyanogen agent storehouse 17;
The slurry outlet of described first reaction warehouse 20 is connected with the import of described flotation device 23 through mortar pump 28-1; Described flotation device 23 is provided with top layer slurry outlet and bottom mud outlet, and the bottom mud outlet of flotation device 23 is connected with the import of described first stirring pool 24, and the outlet of the first stirring pool 24 is connected with the import of described filter press 29 through slush pump 30-1; The liquid outlet of filter press 29 is connected with the charging aperture of the second reaction warehouse 21 through liquid pump 32-2, and described second reaction warehouse 21 is also provided with aluminium removal import, and the outlet at bottom in described aluminium removal storehouse 18 is connected with the aluminium removal import of the second reaction warehouse 21; The slurry outlet of the second reaction warehouse 21 is connected with the import of described filter press 29 through mortar pump 28-2; The liquid outlet of filter press 29 is connected with the charging aperture of the 3rd reaction warehouse 22 through liquid pump 32-2, and described 3rd reaction warehouse 22 is also provided with defluorinating agent import, and the outlet at bottom in described defluorinating agent storehouse 19 is connected with the defluorinating agent import of the 3rd reaction warehouse 22; The top layer slurry outlet of described flotation device 23 is connected with the import of the second stirring pool 25, the outlet of the second stirring pool 25 is connected with the charging aperture of described 3rd reaction warehouse 22 through slush pump 30-2, the slurry outlet of the 3rd reaction warehouse 22 is connected with the import of described filter press through mortar pump 28-3, the liquid outlet of filter press is connected with described cistern 27, for by pressure filtration yielding water recycle and reuse.
In this system, cistern 27 is connected, for supplying water to prepare corresponding liquid medicine in above-mentioned medicament storehouse with alkali lye storehouse 16, except cyanogen agent storehouse 17, aluminium removal storehouse 18, defluorinating agent storehouse 19 respectively by liquid pump 32-2; Meanwhile, cistern 27 is also connected, for preparing or regulate the solid-to-liquid ratio of slurry with the first reaction warehouse 20, second reaction warehouse 21, the 3rd reaction warehouse 22 respectively by liquid pump 32-2; Described acid storage tank 26 is connected with the first reaction warehouse 20 by sour pump 31, for preparing with the water from cistern 27 acid solution that acidleach needs.
In this system, described flotation device 23 comprise connect successively one-level flotation device, secondary floatation machine, three grades of flotation devices, level Four flotation devices, be respectively used to carry out that one-level is roughly selected, secondary is selected, three grades of selected, level Four scan.In this system, the first reaction warehouse 20, second reaction warehouse 21, the 3rd reaction warehouse 22 are equipped with temperature regulating device, and inside is equipped with agitator and temperature feeler lever, is equipped with agitator in the first stirring pool 24, second stirring pool 25; Reaction warehouse is also provided with sample tap, and sample tap is connected with on-line monitoring system, specifies the concentration of ion in automatic detection reaction storehouse; The pipeline that aluminium removal storehouse 18, defluorinating agent storehouse 19 and corresponding reaction warehouse connect also is provided with pump, control valve and flowmeter, for controlling the addition of medicament; In this system, each bin and flotation device inside all adopt epoxy glass laminate as inner wall anti-corrosive; The import and export of each equipment and connecting pipe all arrange magnetic valve, and the opening and closing of each magnetic valve controls by on-line monitoring system.
When the aluminium cell slag from delining resource innocuity disposal system of the present embodiment runs, with forklift, overhaul clinker material is sent into raw material cabin, the overhaul clinker material height in raw material cabin is controlled by diffuse reflection rangefinder, slag from delining in raw material cabin is transported to disintegrating machine through batcher and carries out fragmentation, slag from delining particle after fragmentation sends into the first filler bin by the first elevator, under the control of electronic measurement batcher, slag from delining particle is at the uniform velocity transported to ball mill and wears into 200-300 object fine powder, obtain slag from delining powder, slag from delining powder after ball milling is delivered to the second filler bin by the second elevator, second filler bin bottom is provided with sample tap, sampling preliminary examination is carried out to slag from delining powder, formula after the data drawn are read by on-line monitoring system automatically and in presetting database contrasts, also be provided with electronic measurement batcher, control the slag from delining powder amount be transported in the first reaction warehouse, the amount of water in the first reaction warehouse and the concentrated sulfuric acid (concentrated sulfuric acid is from acid storage tank) is controlled to join by flowmeter metering and on-line monitoring system, then slag from delining powder be transported to the 3rd elevator through conveying worm and send into the first reaction warehouse, abundant stirring obtains mixed slurry and leaches, start the aspiration pump at the first reaction warehouse top, and the temperature of computer heating control mixed slurry is at 60-70 DEG C, under negative pressure state, hydrogen cyanide in system is overflowed with the form of gas, enter in the sodium hydroxide solution in alkali lye storehouse and absorb, the gas failing to absorb completely then enters except further removing except in cyanogen agent solution in cyanogen agent storehouse through pipeline, the concentration of cyanide is detected from the sample tap sampling the first reaction warehouse, and send data to on-line monitoring system, it is qualified that concentration of cyanide in the data detected and on-line monitoring system in presetting database contrasts, except the slurry after cyanogen through Cemented filling to flotation device, flotation rate and the flotation time of automatic control flotation device carry out flotation, and after flotation, the mud of layer deposition sends into the first stirring pool through mud conveying pipeline, then pump into filter press and dewater, filter cake is thick ice crystal, recycles, top layer mud is transported to the second stirring pool by mud conveying pipeline, by the filtrate after the slurry dewatering in the first stirring pool by Cemented filling in the second reaction warehouse, aluminum ions content in automatic detection filtrate, automatically calculate and need the pharmaceutical quantities stirring reaction added to be precipitated with the form of aluminium hydroxide by the aluminium in solution, then the slurry in the second reaction warehouse is sent into filter press through pipeline to dewater, filtrate is delivered in the 3rd reaction warehouse, the content of fluoride of filtrate in automatic detection the 3rd reaction warehouse, automatically the amount needing the defluorinating agent added is calculated, defluorinating agent in defluorinating agent storehouse is joined in the 3rd reaction warehouse, be uniformly mixed except fluorine, the concentration of fluoride is detected from the sample tap the 3rd reaction warehouse, in the data recorded and on-line monitoring system the limit value of presetting database contrast qualified after, slurry in 3rd reaction warehouse is sent into filter press through pipeline dewater, the filter cake obtained can use as the raw material of Chemical Manufacture, filtrate enters cistern, continues to use as recycle-water, mud piping in second stirring pool is transported in the 3rd reaction warehouse, automatic gauge adds water, on-line checkingi obtains the content of fluoride, automatically the amount needing the defluorinating agent added is calculated, defluorinating agent in defluorinating agent storehouse is joined in the 3rd reaction warehouse, be uniformly mixed except fluorine, the concentration of fluoride is detected from the sample tap the 3rd reaction warehouse, in the data recorded and on-line monitoring system the limit value of presetting database contrast qualified after, slurry in 3rd reaction warehouse is sent into filter press through pipeline dewater, the filter cake obtained is through removing fluorine process except cyanogen, achieve innoxious, filtrate is then back to cistern and recycles as recycle-water.
The aluminium cell slag from delining resource innocuity disposal system of the present embodiment, can either realize the harmless treatment of fluoride and cyanide in slag from delining, can reclaim again the electrolyte ice crystal in the charcoal block of waste and old the moon (sun) pole; This system had both solved the stacking problem of aluminium cell slag from delining, can turn waste into wealth again, realize waste residue resource, created good economic benefit.
Adopt the aluminium cell slag from delining resource innocuity disposal system of the present embodiment to carry out the method processed, specifically comprise the following steps:
1) broken: with forklift, overhaul clinker material to be sent into raw material cabin, overhaul clinker material height in raw material cabin is controlled by diffuse reflection rangefinder, slag from delining in raw material cabin is transported to disintegrating machine through batcher and carries out fragmentation, and the slag from delining particle diameter after fragmentation is at 20mm ~ 40mm;
2) grinding: the slag from delining particle after fragmentation sends into the first filler bin by the first elevator, under the control of electronic measurement batcher, slag from delining particle is at the uniform velocity transported to ball mill and is worn into 300 object fine powders, obtains slag from delining powder; Slag from delining powder is delivered to the second filler bin by the second elevator;
3) preliminary examination: sampling preliminary examination is carried out to slag from delining powder from the sample tap of the second filler bin bottom, automatically draw content and the pH value of ice crystal, fluoride, cyanide in slag from delining powder, and the formula after being read by on-line monitoring system automatically and in presetting database contrasts;
4) acidleach: controlled with on-line monitoring system by LOAD CELLS induction, add water in advance in the first reaction warehouse, then the concentrated sulfuric acid in acid storage tank is sent in the first reaction warehouse by pipeline be mixed with the sulfuric acid that mass concentration is 8%; Then under the control of electronic measurement batcher, control the slag from delining powder amount be transported in the first reaction warehouse, slag from delining powder is transported to the 3rd elevator through conveying worm and sends in the first reaction warehouse, be mixed with the slurry that solid-to-liquid ratio is 1:5, leaching 30min is stirred according to the mixing speed of setting, make the strippings such as the iron in slurry, silicon, aluminium, obtain mixed slurry A;
5) except cyanogen: the valve automatically opening pipeline between the first reaction warehouse and alkali lye storehouse, start the aspiration pump at the first reaction warehouse top, and the temperature of computer heating control mixed slurry A is at 60 DEG C, under negative pressure state, hydrogen cyanide in system is overflowed with the form of gas, enter in the sodium hydroxide solution in alkali lye storehouse and absorb, the gas failing to absorb completely then enters through pipeline further to be removed except in the calcium hypochlorite solution in cyanogen agent storehouse, the concentration of cyanide is detected from the sample tap sampling the first reaction warehouse, and send data to on-line monitoring system, it is qualified that concentration of cyanide in the data detected and on-line monitoring system in presetting database contrasts < 0.5mg/L, obtain mixed slurry B, start the mortar pump of the first reaction warehouse slurry outlet, by the mixed slurry B of the first reaction warehouse through Cemented filling in flotation device (one-level flotation device),
6) flotation: be dropwise metered into the first flotation agent (kerosene and terpenic oil are the miscella that 1:1 prepares according to mass ratio) and roughly select in the mixed slurry B of one-level flotation device, automatically controlling one-level flotation device flotation time is 30min; Base pastes after one-level flotation sends into secondary floatation machine, is dropwise metered into the second flotation agent (diesel oil and No. 2 oil are the miscella that 1:1 prepares according to mass ratio) and carries out selected, and automatically controlling flotation time is 20min; Base pastes after secondary floatation sends into three grades of flotation devices, is dropwise metered into the 3rd flotation agent (diesel oil and No. 2 oil are the miscella that 1:1 prepares according to mass ratio) and carries out selected, and automatically controlling flotation time is 20min; Three grades selected after base pastes enter level Four flotation device and be dropwise metered into the 4th flotation agent (camphorated oil) and carry out last scanning, automatic control flotation time is 10min, then be the ratio of 1:100 according to the volume ratio of flocculant and slurry, add the particle agglomeration that polyacrylamide makes in slurry, and suppress the generation of bubble, obtain bottom mud and top layer mud;
Bottom mud sends into the first stirring pool through mud conveying pipeline, then pumps into filter press and dewater, and obtain filter cake and mixed liquor A, filter cake is thick ice crystal; Top layer mud sends into the second stirring pool through mud conveying pipeline;
7) except aluminium: by mixed liquor A by Cemented filling in the second reaction warehouse, automatically detect aluminum ions content in mixed liquor A, OH
-with the Al in mixed liquor A
3+mol ratio be the ratio of 3:1, automatically the amount needing the NaOH added is calculated, NaOH saturated solution in aluminium removal storehouse is joined in the second reaction warehouse, aluminium in system precipitates with the form of aluminium hydroxide by stirring reaction, then the mortar pump discharging of the second reaction warehouse slurry outlet is started, send into filter press through pipeline to dewater, obtain filter cake and mixed liquid B, the filter cake obtained is thick aluminium hydroxide, can use as the raw material of Chemical Manufacture, mixed liquid B is then delivered in the 3rd reaction warehouse;
8) except fluorine: the content of fluoride automatically detecting mixed liquid B in the 3rd reaction warehouse, automatically the amount needing the defluorinating agent added is calculated, defluorinating agent (calcium chloride) solution in defluorinating agent storehouse is joined in the 3rd reaction warehouse, be uniformly mixed except fluorine, the control reaction time is 20min, from the sample tap detection architecture the 3rd reaction warehouse, to be less than 10mg/L qualified for the concentration of soluble fluoride, start the mortar pump discharging of the 3rd reaction warehouse slurry outlet, send into filter press through pipeline to dewater, the filter cake obtained is fluoride, can use as the raw material of Chemical Manufacture, filtrate enters cistern, continue to use as recycle-water,
By the mud in the second stirring pool through Cemented filling in the 3rd reaction warehouse, automatic gauge adds water, on-line checkingi obtains the content of fluoride, automatically the amount needing the defluorinating agent added is calculated, defluorinating agent (calcium chloride) solution in defluorinating agent storehouse is joined in the 3rd reaction warehouse, be uniformly mixed except fluorine, the control reaction time is 20min, 10mg/L is less than qualified from the concentration of the sample tap detection architecture water soluble fluoride the 3rd reaction warehouse, start the mortar pump discharging of the 3rd reaction warehouse slurry outlet, send into filter press through pipeline to dewater, the filter cake obtained is through removing fluorine process except cyanogen, achieve innoxious.
The average price of ice crystal is more than 5000 yuan in the market, adjust to process 10,000 tons of aluminium cell slag from delining every year, production cost 1500 yuan/ton, the then annual output value is more than 5,000,000, profit is more than 3,500,000, in addition the carbon after process can be used as conservation of fuel operating cost, can also use as the raw material of carbon element factory, except the alkaline solution of the Cymag generated after cyanogen, all can use as the raw material of Chemical Manufacture except the fluoride product generated after fluorine, thus generation significant profits, reduce the wasting of resources that simple harmless treatment brings.In aluminium cell slag from delining resource innocuity disposal system of the present utility model, reacted solution can be recycled by backflow, and externally unharmful substance discharge, the waste residue after process also can use as industrial chemicals, achieves no pollution and zero-emission.
In other embodiments of the present utility model, described equipment for separating liquid from solid is filter-pressing device, described filter-pressing device comprises the first filter-pressing device, the second filter-pressing device and the 3rd filter-pressing device, the bottom mud outlet of described flotation unit is connected with the import of the first filter-pressing device, and the liquid outlet of the first filter-pressing device is connected with the charging aperture of the second reaction warehouse; The slurry outlet of described second reaction warehouse is connected with the import of the second filter-pressing device, and the liquid outlet of the second filter-pressing device is connected with the charging aperture of the 3rd reaction warehouse; The slurry outlet of described 3rd reaction warehouse is connected with the import of the 3rd filter-pressing device.Compared with embodiment 1, can save the stirring pool of cushioning effect like this, the slurry that flotation unit, the second reaction warehouse, the 3rd reaction warehouse produce directly can enter filter-pressing device and carry out press filtration process, further increases treatment effeciency.
Claims (5)
1. an aluminium cell slag from delining resource innocuity disposal system, it is characterized in that: comprise the first reaction warehouse, the second reaction warehouse, the 3rd reaction warehouse, alkali lye storehouse, flotation unit and equipment for separating liquid from solid, the top of described first reaction warehouse is provided with charge door, the gas vent of the first reaction warehouse is connected through the bottom gas inlet of aspiration pump with described alkali lye storehouse, and the slurry outlet of the first reaction warehouse is connected with the import of described flotation unit; Described flotation unit is provided with top layer slurry outlet and bottom mud outlet, the bottom mud outlet of flotation unit, the slurry outlet of the second reaction warehouse, the slurry outlet of the 3rd reaction warehouse are connected with the import of described equipment for separating liquid from solid respectively, the liquid outlet of described equipment for separating liquid from solid is connected with the charging aperture of described second reaction warehouse, the charging aperture of the 3rd reaction warehouse respectively, and the top layer slurry outlet of flotation unit is connected with the charging aperture of the 3rd reaction warehouse; Described second reaction warehouse is also provided with aluminium removal import, the 3rd reaction warehouse is also provided with defluorinating agent import.
2. aluminium cell slag from delining resource innocuity disposal system according to claim 1, it is characterized in that: also comprise except cyanogen agent storehouse, aluminium removal storehouse and defluorinating agent storehouse, the upper gas outlet in described alkali lye storehouse is connected with the described bottom gas inlet except cyanogen agent storehouse through aspiration pump; The outlet at bottom in described aluminium removal storehouse is connected with the aluminium removal import of the second reaction warehouse, and the outlet at bottom in described defluorinating agent storehouse is connected with the defluorinating agent import of the 3rd reaction warehouse.
3. aluminium cell slag from delining resource innocuity disposal system according to claim 1, it is characterized in that: between described flotation unit and equipment for separating liquid from solid, be also provided with the first stirring pool, the bottom mud outlet of described flotation unit is connected with the import of described first stirring pool, and the outlet of the first stirring pool is connected with the import of described equipment for separating liquid from solid; Also be provided with the second stirring pool between described flotation unit and the 3rd reaction warehouse, the top layer slurry outlet of described flotation unit is connected with the import of the second stirring pool, and the outlet of the second stirring pool is connected with the charging aperture of described 3rd reaction warehouse.
4. aluminium cell slag from delining resource innocuity disposal system according to claim 1, it is characterized in that: described equipment for separating liquid from solid is filter-pressing device, described filter-pressing device comprises the first filter-pressing device, the second filter-pressing device and the 3rd filter-pressing device, the bottom mud outlet of described flotation unit is connected with the import of the first filter-pressing device, and the liquid outlet of the first filter-pressing device is connected with the charging aperture of the second reaction warehouse; The slurry outlet of described second reaction warehouse is connected with the import of the second filter-pressing device, and the liquid outlet of the second filter-pressing device is connected with the charging aperture of the 3rd reaction warehouse; The slurry outlet of described 3rd reaction warehouse is connected with the import of the 3rd filter-pressing device.
5. the aluminium cell slag from delining resource innocuity disposal system according to any one of claim 1-4, it is characterized in that: also comprise grinding device, described grinding device comprises raw material cabin, disintegrating machine, first filler bin, ball mill and the second filler bin, described raw material cabin is connected with described disintegrating machine by batcher, described disintegrating machine is connected with described first filler bin by the first elevator, described first filler bin is connected with described ball mill by batcher, described ball mill is connected with described second filler bin by the second elevator, the outlet of described second filler bin is successively through conveying worm, 3rd elevator is connected with the charging aperture of described first reaction warehouse.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984984A (en) * | 2015-07-31 | 2015-10-21 | 郑州鸿跃环保科技有限公司 | Recycled and harmless disposing method and system for slag after overhaul of aluminum electrolytic cell |
| CN105728440A (en) * | 2016-04-12 | 2016-07-06 | 郑州鸿跃环保科技有限公司 | Aluminum electrolytic cell overhaul dreg harmless treatment system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984984A (en) * | 2015-07-31 | 2015-10-21 | 郑州鸿跃环保科技有限公司 | Recycled and harmless disposing method and system for slag after overhaul of aluminum electrolytic cell |
| CN104984984B (en) * | 2015-07-31 | 2016-11-02 | 郑州鸿跃环保科技有限公司 | A kind of aluminium cell slag from delining resource method for innocent treatment and system |
| CN105728440A (en) * | 2016-04-12 | 2016-07-06 | 郑州鸿跃环保科技有限公司 | Aluminum electrolytic cell overhaul dreg harmless treatment system and method |
| CN105728440B (en) * | 2016-04-12 | 2019-11-08 | 郑州鸿跃环保科技有限公司 | A kind of aluminium cell slag from delining innocuity disposal system and processing method |
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