CN109797280A - The low zinc gray dangerous waste object cogeneration of steel is used for the method and system of electrolytic zinc production - Google Patents
The low zinc gray dangerous waste object cogeneration of steel is used for the method and system of electrolytic zinc production Download PDFInfo
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- CN109797280A CN109797280A CN201910169222.9A CN201910169222A CN109797280A CN 109797280 A CN109797280 A CN 109797280A CN 201910169222 A CN201910169222 A CN 201910169222A CN 109797280 A CN109797280 A CN 109797280A
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- zinc
- filtrate
- filter
- rotary kiln
- pressure filtration
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000011701 zinc Substances 0.000 title claims abstract description 74
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 74
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 19
- 238000003825 pressing Methods 0.000 claims abstract description 67
- 238000002386 leaching Methods 0.000 claims abstract description 65
- 238000000746 purification Methods 0.000 claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000011085 pressure filtration Methods 0.000 claims abstract description 55
- 239000000706 filtrate Substances 0.000 claims abstract description 53
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 41
- 239000002918 waste heat Substances 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 23
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 20
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 13
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 13
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 10
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 10
- 238000010248 power generation Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 30
- 239000010802 sludge Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000002893 slag Substances 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention provides a kind of low zinc gray dangerous waste object cogeneration of steel for electrolytic zinc production method and system, ammonium hydrogen carbonate will be added after raw material pulp and sodium bicarbonate carry out leaching filters pressing, and after filtrate is purified filters pressing, obtain the 4th filtrate；By filter residue and it is passed through rotary kiln；4th filtrate is electrolysed to obtain electrolytic zinc, electrolysis waste solution and electrolytic waste slag；The exhanst gas outlet of rotary kiln is passed through waste heat boiler, and the steam of waste heat boiler is passed through low-temperature generation device power generation, and the electric energy that low-temperature generation device generates enters the electrolytic cell of electrolysis unit.System includes slurrying device, the first leaching pressure filtration mechanism, rotary kiln, purification pressure filtration mechanism, electrolysis unit, waste heat boiler, low-temperature generation device；The exhanst gas outlet of rotary kiln is connected to waste heat boiler, and the steam (vapor) outlet of waste heat boiler is connected to low-temperature generation device, and low-temperature generation device connects electrolysis unit.After waste heat is converted electric energy by the present invention, for the electric energy of electrolysis unit, the energy is greatly saved, the electric energy supply for producing electrolytic zinc reaches self-sufficient.
Description
Technical field
The present invention relates to electrolytic zinc production energy-saving technical fields, send out more particularly to a kind of low zinc gray dangerous waste object waste heat of steel
Method and system of the electricity for electrolytic zinc production.
Background technique
Currently, the flue gas of rotary kiln is mainly the water-cooled jacket for passing through oxidation expansion chamber, by rotary kiln in the production of zinc oxide
High temperature out and the gas containing various partial oxides and dust carry out cooling and heat dissipation separation and continue to aoxidize.It then will be high
(500-700 DEG C) of wet body passes through several groups (about ten groups or more) herringbone tube's radiating and cooling, when reaching outlet, temperature Ying Buchao
160 DEG C are crossed, to realize that outlet air temperature is lower than 160 DEG C, usually can also increase heat by the method for deepening herringbone tube seat water level
Absorption, to avoid excessively high temperature to bag filter generate damage.
From the foregoing, it will be observed that the rotary kiln of the prior art, fume afterheat damage, and consuming is more, causes great energy waste.
Based on this, the prior art still has much room for improvement.
Summary of the invention
Present invention technical problem to be solved is to provide a kind of low zinc gray dangerous waste object cogeneration of steel for electrolytic zinc
Energy-saving production method and system, to solve problem of the prior art.
To solve the above-mentioned problems, the present invention provides a kind of low zinc gray dangerous waste object cogeneration of steel and produces for electrolytic zinc
Method and system, the technical solution taken is as follows:
On the one hand, the embodiment of the invention discloses a kind of low zinc gray dangerous waste object cogenerations of steel to be used for electrolytic zinc producer
Method includes the following steps:
Zinc gray, cadmia and/or tutty are carried out pulp processing by step 1 in slurrying device, obtain pulp mine liquid；
Ammonium hydrogen carbonate and sodium bicarbonate will be added in step 2 in the pulp mine liquid, carry out in the first leaching pressure filtration mechanism
After leaching, filters pressing, the first filtrate and the first filter residue are obtained；
Zinc granule or zinc powder are added in first filtrate described in step three-dimensional, carries out purification and filters pressing in purification pressure filtration mechanism
Afterwards, the 4th filtrate and the 4th filter residue are obtained；First filter residue and low zinc blast furnace ash and coke powder are passed through in rotary kiln
Reason；
4th filtrate is passed through in electrolysis unit and carries out electrolysis processing by step 4, obtain electrolytic zinc, electrolysis waste solution and
Electrolytic waste slag；
Wherein, the exhanst gas outlet of the rotary kiln is passed through waste heat boiler and exchanges heat, and the steam of the waste heat boiler is passed through
Low-temperature generation device power generation, the electric energy that the low-temperature generation device generates enter the electrolytic cell of electrolysis unit.
Further, in step 3, the second leaching pressure filtration mechanism is added in first filter residue and carries out secondary leaching and pressure
After filter, the second obtained filter residue, which is added in rotary kiln, to be handled, and the second filtrate is incorporated to the first filtrate and carries out purification and filters pressing.
Further, in step 3, first zinc granule or zinc powder will be added in first filtrate, carry out filters pressing after slightly purifying,
Third filtrate and third filter residue are obtained, ultrapure thin zinc powder is added in Xiang Suoshu third filtrate, filters pressing after double purification is carried out, obtains
4th filtrate and the 4th filter residue.
Further, the electrolysis waste solution is passed through slurrying device；The electrolytic waste slag is passed through rotary kiln.
Further, the exhanst gas outlet of the rotary kiln is connected to bag-type dust after through the residual heat boiler for exchanging heat
Device is dusted processing, and the gas connection after dedusting to desulfurizer carries out desulfurization process；By the dust of the bag filter
It exports obtained tutty and the slurrying device is added.
Further, in step 2, the zinc gray, cadmia and/or tutty raw material are according to solid-to-liquid ratio 1:(3~5) slurry
Change；The ammonium hydrogen carbonate and sodium bicarbonate are with mass ratio 3:1 according to adding the zinc gray, cadmia and/or thick oxidation in step 1
The 4%~10% of zinc material quality is added.
Further, obtained third filter residue and the 4th filter residue are passed through lead recovery circuit recycling lead.
Further, when rotary kiln is handled, low zinc blast furnace ash and coke powder are put into according to volume ratio 7:3, second filter residue
Rotary kiln processing is added according to the 5%~10% of processing material total amount.
On the other hand, it is raw for electrolytic zinc that the embodiment of the invention also discloses a kind of low zinc gray dangerous waste object cogenerations of steel
Production system comprising:
Slurrying device, the first leaching pressure filtration mechanism, rotary kiln, purification pressure filtration mechanism, electrolysis unit, waste heat boiler, low temperature
Power generator；Wherein,
The material outlet of the slurrying device is connected to the material inlet of the first leaching pressure filtration mechanism；
The sludge outlet of the first leaching pressure filtration mechanism is connected to rotary kiln；
The filtrate (liquid of the first leaching pressure filtration mechanism is connected to the material inlet of the purification pressure filtration mechanism；
The filtrate (liquid of the purification pressure filtration mechanism is connected to the electrolyte inlet of the electrolysis unit；
The exhanst gas outlet of the rotary kiln is connected to waste heat boiler, provides heat source, the waste heat pot for the waste heat boiler
The steam (vapor) outlet of furnace is connected to low-temperature generation device, and the low-temperature generation device connects the electrolysis unit.
Further, the first leaching pressure filtration mechanism includes first leaching device and the first filter-pressing device, wherein
The material outlet of the slurrying device is connected to the material inlet of the first leaching device, the first leaching device
Material outlet be connected to first filter-pressing device, the sludge outlet of first filter-pressing device is connected to the rotary kiln,
The filtrate (liquid of first filter-pressing device is connected to the material inlet of the purification pressure filtration mechanism.
Further, the purification pressure filtration mechanism includes thick purification device, third filter-pressing device, double purification device and
Four filter-pressing devices, wherein
The material inlet of the thick purification device is connected to the filtrate (liquid of the first leaching pressure filtration mechanism, and described thick net
Makeup, which is set, is additionally provided with thick Purifying Zinc import, for being passed through zinc granule or zinc powder into the thick purification device；
The material outlet of the thick purification device is connected to the material inlet of the third filter-pressing device, the third filters pressing
The filtrate (liquid of device is connected to the material inlet of the double purification device, the material outlet connection of the double purification device
To the 4th filter-pressing device, the filtrate (liquid of the 4th filter-pressing device is connected to electrolysis unit；
Double purification zinc import is provided on the double purification device, it is super for being passed through into the double purification device
Pure thin zinc powder.
It further, further include the second leaching pressure filtration mechanism, the material inlet of the second leaching pressure filtration mechanism is connected to institute
The sludge outlet of the first leaching pressure filtration mechanism is stated, the sludge outlet of the second leaching pressure filtration mechanism is connected to the rotary kiln.
Further, the second leaching pressure filtration mechanism includes secondary leaching device and the second filter-pressing device, wherein described
The material inlet of secondary leaching device is connected to the sludge outlet of the first leaching pressure filtration mechanism, the object of the secondary leaching device
Expect that the material inlet of outlet to second filter-pressing device, the sludge outlet of second filter-pressing device are connected to described return
Rotary kiln.
Further, the exhanst gas outlet of the rotary kiln is connected to bag-type dust after through the residual heat boiler for exchanging heat
The gas vent of device, the bag filter is connected to desulfurizer；
The dust export of the bag filter is connected to the slurrying device.
Further, it is additionally provided with ammonium bicarbonate feed inlet on the first leaching device, be used for the first leaching device
Interior addition ammonium hydrogen carbonate and sodium bicarbonate.
Further, the sludge outlet of the third filter-pressing device is connected to the sludge outlet of the 4th filter-pressing device
To lead recovery circuit.
Further, the waste residue outlet of the electrolysis unit is connected to the rotary kiln.
Further, the waste liquid outlet of the electrolysis unit is connected to the slurrying device；It is also set up on the rotary kiln
There are low zinc blast furnace ash and coke powder import.
The beneficial effects of the present invention are:
The present invention carries out waste heat recovery processing to the high-temperature flue gas of rotary kiln by waste heat boiler and low-temperature generation device, will
After waste heat is converted into electric energy, for the electric energy of electrolysis unit, the energy is greatly saved, the electric energy supply for producing electrolytic zinc is as far as possible
Reach self-sufficient.
Detailed description of the invention
Fig. 1 is electrolytic zinc flow sheet of the invention；
Fig. 2 is electrolytic zinc operation system structure schematic diagram of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.
As shown in Figure 1, the embodiment of the invention discloses a kind of low zinc gray dangerous waste object cogenerations of steel to be used for electrolytic zinc certainly
The method of production, includes the following steps:
Zinc gray, cadmia and/or tutty are carried out pulp processing by step 1 in slurrying device, obtain pulp mine liquid,
The zinc gray, cadmia and/or tutty raw material are according to the pulp of solid-to-liquid ratio 1:3~5；
Ammonium hydrogen carbonate and sodium bicarbonate will be added in step 2 in the pulp mine liquid, carry out in the first leaching pressure filtration mechanism
After leaching, filters pressing, the first filtrate and the first filter residue are obtained；Wherein, the mass ratio of the ammonium hydrogen carbonate and sodium bicarbonate is 3:1,
Additional amount is the 4%-10% of pulp mine liquid quality；
Zinc is added in first filtrate described in step three-dimensional, after carrying out purification and filters pressing in purification pressure filtration mechanism, obtains the
Four filtrates and the 4th filter residue；First filter residue and low zinc blast furnace ash and coke powder are passed through in rotary kiln and are handled；
Wherein, first filter residue is added after the second leaching pressure filtration mechanism carries out secondary leaching and filters pressing, the obtained
Two filter residues are added in rotary kiln and are handled, and additional amount is the 5%-10% that rotary kiln handles gross mass；When rotary kiln processing, together
When be added low zinc blast furnace ash and coke powder, the volume ratio of low zinc blast furnace ash and coke powder is 7:3.First zinc will be added in first filtrate
Grain or zinc powder carry out filters pressing after slightly purifying, obtain third filtrate and third filter residue, ultrapure thin zinc is added in Xiang Suoshu third filtrate
Powder carries out filters pressing after double purification, obtains the 4th filtrate and the 4th filter residue.
4th filtrate is passed through in electrolysis unit and carries out electrolysis processing by step 4, obtain electrolytic zinc, electrolysis waste solution and
Electrolytic waste slag；
Wherein, the exhanst gas outlet of the rotary kiln is passed through waste heat boiler and exchanges heat, and the steam of the waste heat boiler is passed through
Low-temperature generation device power generation, the electric energy that the low-temperature generation device generates enter the electrolytic cell of electrolysis unit.It preferably, will be described
Electrolysis waste solution is passed through slurrying device；Institute's electrolytic waste slag is passed through rotary kiln.The exhanst gas outlet of the rotary kiln is by described remaining
It after heat boiler heat exchange, is connected to bag filter and is dusted processing, the gas connection after dedusting to desulfurizer carries out desulfurization
Processing；The slurrying device is added in the tutty that the dust export of the bag filter is obtained.Obtained third is filtered
Slag and the 4th filter residue are passed through lead recovery circuit recycling lead.
As shown in Fig. 2, the embodiment of the present invention also discloses a kind of low zinc gray dangerous waste object cogeneration of steel for being electrolysed
Zinc production system comprising slurrying device, the first leaching pressure filtration mechanism, rotary kiln, purification pressure filtration mechanism, electrolysis unit, waste heat
Boiler, low-temperature generation device；Wherein, the material outlet of the slurrying device be connected to it is described first leaching pressure filtration mechanism material into
Mouthful；The sludge outlet of the first leaching pressure filtration mechanism is connected to rotary kiln；The filtrate (liquid of the first leaching pressure filtration mechanism
It is connected to the material inlet of the purification pressure filtration mechanism；The filtrate (liquid of the purification pressure filtration mechanism is connected to the electrolysis unit
Electrolyte inlet；The exhanst gas outlet of the rotary kiln is connected to waste heat boiler, provides heat source, the waste heat for the waste heat boiler
The steam (vapor) outlet of boiler is connected to low-temperature generation device, and the low-temperature generation device connects the electrolysis unit.
In some embodiments of the present invention, the first leaching pressure filtration mechanism includes first leaching device and the first filters pressing dress
It sets, wherein the material outlet of the slurrying device is connected to the material inlet of the first leaching device, the first leaching device
Material outlet be connected to first filter-pressing device, the sludge outlet of first filter-pressing device is connected to the rotary kiln,
The filtrate (liquid of first filter-pressing device is connected to the material inlet of the purification pressure filtration mechanism.
In some embodiments of the present invention, the purification pressure filtration mechanism includes thick purification device, third filter-pressing device, secondary
Purification device and the 4th filter-pressing device, wherein
The material inlet of the thick purification device is connected to the filtrate (liquid of the first leaching pressure filtration mechanism, and described thick net
Makeup, which is set, is additionally provided with thick Purifying Zinc import, for being passed through zinc granule or zinc powder into the thick purification device；
The material outlet of the thick purification device is connected to the material inlet of the third filter-pressing device, the third filters pressing
The filtrate (liquid of device is connected to the material inlet of the double purification device, the material outlet connection of the double purification device
To the 4th filter-pressing device, the filtrate (liquid of the 4th filter-pressing device is connected to electrolysis unit；
Double purification zinc import is provided on the double purification device, it is super for being passed through into the double purification device
Pure thin zinc powder.
It further include the second leaching pressure filtration mechanism on the basis of the above embodiments in some embodiments of the present invention, it is described
The material inlet of second leaching pressure filtration mechanism is connected to the sludge outlet of the first leaching pressure filtration mechanism, the second leaching filters pressing
The sludge outlet of mechanism is connected to the rotary kiln.
In some embodiments of the present invention, the second leaching pressure filtration mechanism includes secondary leaching device and the second filters pressing dress
It sets, wherein the material inlet of the secondary leaching device is connected to the sludge outlet of the first leaching pressure filtration mechanism, described secondary
The material outlet of leaching device is connected to the material inlet of second filter-pressing device, the sludge outlet of second filter-pressing device
It is connected to the rotary kiln.
In some embodiments of the present invention, the exhanst gas outlet of the rotary kiln is after through the residual heat boiler for exchanging heat, even
Bag filter is passed to, the gas vent of the bag filter is connected to desulfurizer；The dust of the bag filter goes out
Mouth is connected to the slurrying device.It is additionally provided with ammonium bicarbonate feed inlet on the first leaching device, is used for the first leaching
Ammonium hydrogen carbonate and sodium bicarbonate are added in device.The filter of the sludge outlet of the third filter-pressing device and the 4th filter-pressing device
Slag outlet is connected to lead recovery circuit.The waste residue outlet of the electrolysis unit is connected to the rotary kiln.The electrolysis unit
Waste liquid outlet be connected to the slurrying device；Low zinc blast furnace ash and coke powder import are additionally provided on the rotary kiln.
Embodiment 1
A kind of low zinc gray dangerous waste object cogeneration of steel is used for electrolytic zinc production method, and zinc gray, cadmia, tutty are existed
Pulp pond or pulp tank carry out pulp, and ammonium bicarbonate is added in the mine liquid after pulp, and (mass ratio of ammonium hydrogen carbonate and sodium bicarbonate is
It 3:1) is leached in leaching tanks, mechanical stirring is carried out in leaching process, press filteration system is entered after stirring, is divided into the first filtrate
With the first filter residue；By the secondary leaching of the first filter residue, filters pressing is carried out, the second filter residue after filters pressing enters rotary kiln, in the first filtrate
Middle addition zinc granule or zinc powder are slightly purified, secondary filters pressing after thick purification；Wherein, the third filter residue after secondary filters pressing is high lead
Slag, high lead slag enter lead recovery circuit, and ultrapure thin zinc powder is added in the third filtrate after secondary filters pressing, carry out double purification；
Filters pressing three times is carried out after double purification, the 4th filter residue after filters pressing is lead cadmium slag three times, and lead cadmium slag is sent into lead recovery circuit；Three times
The 4th filtrate after filters pressing enters electrolytic cell, obtains electrolytic zinc；Electrolysis waste solution is back to pulp pond or pulp tank；, after electrolysis
Waste residue enters rotary kiln；Low zinc blast furnace ash and reducing agent coke powder are added in rotary kiln, day is set at the kiln hood of rotary kiln
Right air burner or coke-stove gas, for giving rotary kiln additional heat；The high-temperature flue gas of rotary kiln enters waste heat boiler,
So that waste heat boiler generates steam, steam is sent to low-temperature electricity-generating unit system；The steam is for giving cryogenerator system
Steam turbine in system provides power, and the electric energy that low-temperature electricity-generating unit system generates enters electrolytic cell；The flue gas of waste heat boiler enters
In bagroom, tutty is back in pulp pond or pulp tank, after dedusting by the dust tail tutty being collected into
Gas enter after desulfurizing tower and carry out qualified discharge.
In conclusion the embodiment of the present invention removes expansion chamber in the prior art and herringbone tube seat, it is changed to waste heat pot
Furnace and power generator, waste heat boiler can produce steam, collect oxide and dust, and can be between waste heat boiler and economizer
The out of stock device of SCR is set, tail gas meet the requirement of environmental protection is made, not only can solve the out of stock environmental issue of tail gas, but also can be electrolysis dress
Offer electric energy is provided, the electric energy of zinc oxide production system is made to reach self-sufficient.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. the method that a kind of low zinc gray dangerous waste object cogeneration of steel is used for electrolytic zinc production, which is characterized in that including walking as follows
It is rapid:
Zinc gray, cadmia and/or tutty are carried out pulp processing by step 1 in slurrying device, obtain pulp mine liquid；
Ammonium hydrogen carbonate and sodium bicarbonate will be added in step 2 in the pulp mine liquid, soaked in the first leaching pressure filtration mechanism
It takes, after filters pressing, obtains the first filtrate and the first filter residue；
Zinc granule or zinc powder are added in first filtrate described in step three-dimensional, after carrying out purification and filters pressing in purification pressure filtration mechanism, obtains
To the 4th filtrate and the 4th filter residue；First filter residue and low zinc blast furnace ash and coke powder are passed through in rotary kiln and are handled；
4th filtrate is passed through in electrolysis unit and carries out electrolysis processing by step 4, obtains electrolytic zinc, electrolysis waste solution and electrolysis
Waste residue；
Wherein, the exhanst gas outlet of the rotary kiln is passed through waste heat boiler and exchanges heat, and the steam of the waste heat boiler is passed through low temperature
Power generator power generation, the electric energy that the low-temperature generation device generates enter the electrolytic cell of electrolysis unit.
2. the method according to claim 1, wherein the second leaching is added in first filter residue in step 3
After pressure filtration mechanism carries out secondary leaching and filters pressing, the second obtained filter residue, which is added in rotary kiln, to be handled, and the second filtrate is incorporated to
First filtrate carries out purification and filters pressing.
3. the method according to claim 1, wherein first zinc granule will be added in first filtrate in step 3
Or zinc powder, filters pressing after slightly purifying is carried out, third filtrate and third filter residue is obtained, ultrapure thin zinc is added in Xiang Suoshu third filtrate
Powder carries out filters pressing after double purification, obtains the 4th filtrate and the 4th filter residue.
4. the method according to claim 1, wherein the electrolysis waste solution is passed through slurrying device；By the electricity
Solution waste residue is passed through rotary kiln, forms closed cycle.
5. the method according to claim 1, wherein the exhanst gas outlet of the rotary kiln is passing through the waste heat pot
It after furnace heat exchange, is connected to bag filter and is dusted processing, the gas connection after dedusting to desulfurizer carries out desulfurization process；
The slurrying device is added in the tutty that the dust export of the bag filter is obtained.
6. the method according to claim 1, wherein the zinc gray, cadmia and/or tutty raw material are according to solid
Liquor ratio 1:(3~5) pulp；In step 2, the ammonium hydrogen carbonate and sodium bicarbonate are with mass ratio 3:1 according to the zinc gray, cadmia
And/or the 4%~10% of tutty material quality is added.
7. according to the method described in claim 3, it is characterized in that, obtained third filter residue and the 4th filter residue are passed through lead recycling
System recycles lead.
8. the method according to claim 1, wherein low zinc blast furnace ash and coke powder are according to body when rotary kiln is handled
Product is put into than 7:3, and second filter residue is added rotary kiln according to the 5~10% of processing material total amount and handles.
9. a kind of low zinc gray dangerous waste object cogeneration of steel is used for electrolytic zinc production system characterized by comprising
Slurrying device, the first leaching pressure filtration mechanism, rotary kiln, purification pressure filtration mechanism, electrolysis unit, waste heat boiler, low-temperature electricity-generating
Device；Wherein,
The material outlet of the slurrying device is connected to the material inlet of the first leaching pressure filtration mechanism；
The sludge outlet of the first leaching pressure filtration mechanism is connected to rotary kiln；
The filtrate (liquid of the first leaching pressure filtration mechanism is connected to the material inlet of the purification pressure filtration mechanism；
The filtrate (liquid of the purification pressure filtration mechanism is connected to the electrolyte inlet of the electrolysis unit；
The exhanst gas outlet of the rotary kiln is connected to waste heat boiler, provides heat source for the waste heat boiler, the waste heat boiler
Steam (vapor) outlet is connected to low-temperature generation device, and the low-temperature generation device connects the electrolysis unit.
10. system according to claim 9, which is characterized in that the first leaching pressure filtration mechanism includes first leaching dress
It sets and the first filter-pressing device, wherein
The material outlet of the slurrying device is connected to the material inlet of the first leaching device, the object of the first leaching device
Outlet is expected to first filter-pressing device, and the sludge outlet of first filter-pressing device is connected to the rotary kiln, described
The filtrate (liquid of first filter-pressing device is connected to the material inlet of the purification pressure filtration mechanism；
The purification pressure filtration mechanism includes thick purification device, third filter-pressing device, double purification device and the 4th filter-pressing device,
In,
The material inlet of the thick purification device is connected to the filtrate (liquid of the first leaching pressure filtration mechanism, and the thick purification dress
It sets and is additionally provided with thick Purifying Zinc import, for being passed through zinc granule or zinc powder into the thick purification device；
The material outlet of the thick purification device is connected to the material inlet of the third filter-pressing device, the third filter-pressing device
Filtrate (liquid be connected to the material inlet of the double purification device, the material outlet of the double purification device is connected to institute
The 4th filter-pressing device is stated, the filtrate (liquid of the 4th filter-pressing device is connected to electrolysis unit；
Double purification zinc import is provided on the double purification device, it is ultrapure thin for being passed through into the double purification device
Zinc powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2018114178084 | 2018-11-26 | ||
| CN201811417808 | 2018-11-26 |
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| CN109797280A true CN109797280A (en) | 2019-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910169222.9A Pending CN109797280A (en) | 2018-11-26 | 2019-03-06 | The low zinc gray dangerous waste object cogeneration of steel is used for the method and system of electrolytic zinc production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112481508A (en) * | 2020-11-27 | 2021-03-12 | 韶关凯鸿纳米材料有限公司 | Low-degree steel plant flue gas furnace ash treatment method and device |
| CN116734624A (en) * | 2023-08-15 | 2023-09-12 | 山西锌创研环境科技有限公司 | Ferrochrome pellet shaft furnace waste heat utilization device and utilization method thereof |
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