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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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000011701 zinc Substances 0.000 title claims abstract description 73
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 73
- 239000002699 waste material Substances 0.000 title claims abstract description 25
- 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 15
- 238000003825 pressing Methods 0.000 claims abstract description 99
- 238000002386 leaching Methods 0.000 claims abstract description 60
- 239000000706 filtrate Substances 0.000 claims abstract description 53
- 239000002918 waste heat Substances 0.000 claims abstract description 50
- 238000000746 purification Methods 0.000 claims abstract description 46
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 33
- 238000010248 power generation Methods 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 22
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 14
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 14
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 11
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 46
- 239000000428 dust Substances 0.000 claims description 31
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 18
- 239000011787 zinc oxide Substances 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 14
- 239000003546 flue gas Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 239000002920 hazardous waste Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000011085 pressure filtration Methods 0.000 abstract 2
- 238000004891 communication Methods 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 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 invention relates to the technical field of electrolytic zinc energy-saving production, in particular to a method and a system for generating electricity by using waste heat of steel low-zinc-ash dangerous waste to produce electrolytic zinc.
Background
At present, in the production of zinc oxide, flue gas of a rotary kiln is mainly subjected to cooling, heat dissipation and separation and continuous oxidation of high-temperature gas containing various partial oxides and dust from the rotary kiln through a water cooling jacket of an oxidation settling chamber. Then, high-temperature gas (500-.
Therefore, in the rotary kiln in the prior art, the waste heat of the flue gas is damaged and consumes more energy, which causes great energy waste.
Based on this, the prior art still remains to be improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving production method and system for electrolyzing zinc by generating power by using waste heat of low-zinc-ash hazardous wastes of steel, so as to solve the problems in the prior art.
In order to solve the problems, the invention provides a method and a system for generating electricity by waste heat of low-zinc-ash hazardous wastes of steel and iron for producing electrolytic zinc, which adopt the following technical scheme:
on one hand, the embodiment of the invention discloses a method for producing electrolytic zinc by generating power by using waste heat of low-zinc-ash hazardous wastes of steel, which comprises the following steps:
firstly, slurrying zinc ash, zinc slag and/or crude zinc oxide in a slurrying device to obtain slurried mineral liquid;
adding ammonium bicarbonate and sodium bicarbonate into the slurried ore liquid, and leaching and filter-pressing the slurry in a first leaching and filter-pressing mechanism to obtain a first filtrate and a first filter residue;
adding zinc particles or zinc powder into the three-way first filtrate, and purifying and filter-pressing in a purifying filter-pressing mechanism to obtain fourth filtrate and fourth filter residue; introducing the first filter residue, low-zinc blast furnace ash and coke powder into a rotary kiln for treatment;
step four, introducing the fourth filtrate into an electrolysis device for electrolysis treatment to obtain electrolytic zinc, electrolytic waste liquid and electrolytic waste residues;
the flue gas outlet of the rotary kiln is communicated with a waste heat boiler for heat exchange, steam of the waste heat boiler is communicated with a low-temperature power generation device for power generation, and electric energy generated by the low-temperature power generation device enters an electrolytic cell of an electrolysis device.
And further, in the third step, adding the first filter residue into a second leaching and filter pressing mechanism for secondary leaching and filter pressing, adding the obtained second filter residue into a rotary kiln for treatment, and merging the second filtrate into the first filtrate for purification and filter pressing.
Further, in the third step, firstly, zinc particles or zinc powder is added into the first filtrate, coarse purification and filter pressing are carried out to obtain a third filtrate and a third filter residue, and ultra-pure fine zinc powder is added into the third filtrate, secondary purification and filter pressing are carried out to obtain a fourth filtrate and a fourth filter residue.
Further, the electrolytic waste liquid is introduced into a slurrying device; and introducing the electrolytic waste residue into a rotary kiln.
Furthermore, after heat exchange is carried out on a flue gas outlet of the rotary kiln through the waste heat boiler, the flue gas outlet is communicated to a bag-type dust remover for dust removal treatment, and gas after dust removal is communicated to a desulfurization device for desulfurization treatment; and adding crude zinc oxide obtained from a dust outlet of the bag-type dust remover into the slurrying device.
Further, in the second step, the zinc ash, the zinc slag and/or the crude zinc oxide raw material are mixed according to a solid-to-liquid ratio of 1: (3-5) pulping; and adding 4-10% of the zinc ash, the zinc slag and/or the crude zinc oxide raw material in the step one according to the mass ratio of 3: 1.
And further, introducing the obtained third filter residue and fourth filter residue into a lead recovery system to recover lead.
Further, when the low-zinc blast furnace ash and the coke powder are treated in the rotary kiln, the volume ratio of the low-zinc blast furnace ash to the coke powder is 7:3, adding the second filter residue into a rotary kiln for treatment according to 5-10% of the total amount of the treated material.
On the other hand, the embodiment of the invention also discloses a system for generating power by using the waste heat of the low zinc ash hazardous wastes of steel and iron for producing electrolytic zinc, which comprises the following steps:
the device comprises a slurrying device, a first leaching and filter-pressing mechanism, a rotary kiln, a purifying and filter-pressing mechanism, an electrolysis device, a waste heat boiler and a low-temperature power generation device; wherein,
the material outlet of the slurrying device is communicated with the material inlet of the first leaching and filter-pressing mechanism;
a filter residue outlet of the first leaching and filter-pressing mechanism is communicated to the rotary kiln;
the filtrate outlet of the first leaching and filter-pressing mechanism is communicated to the material inlet of the purifying and filter-pressing mechanism;
a filtrate outlet of the purifying and filter-pressing mechanism is communicated with an electrolyte inlet of the electrolysis device;
the smoke outlet of the rotary kiln is communicated to a waste heat boiler to provide a heat source for the waste heat boiler, the steam outlet of the waste heat boiler is communicated with a low-temperature power generation device, and the low-temperature power generation device is connected with the electrolysis device.
Further, the primary leaching filter press mechanism comprises a primary leaching device and a primary filter press device, wherein,
the material outlet of the slurrying device is communicated with the material inlet of the primary leaching device, the material outlet of the primary leaching device is communicated to the first filter pressing device, the filter residue outlet of the first filter pressing device is communicated to the rotary kiln, and the filtrate outlet of the first filter pressing device is communicated to the material inlet of the purifying filter pressing mechanism.
Further, the purifying and filter-pressing mechanism comprises a coarse purifying device, a third filter-pressing device, a secondary purifying device and a fourth filter-pressing device, wherein,
the material inlet of the coarse purification device is communicated with the filtrate outlet of the first leaching and filter-pressing mechanism, and the coarse purification device is also provided with a coarse purification zinc inlet for introducing zinc particles or zinc powder into the coarse purification device;
a material outlet of the coarse purification device is communicated to a material inlet of the third filter pressing device, a filtrate outlet of the third filter pressing device is communicated to a material inlet of the secondary purification device, a material outlet of the secondary purification device is communicated to the fourth filter pressing device, and a filtrate outlet of the fourth filter pressing device is communicated to the electrolysis device;
and the secondary purification device is provided with a secondary purification zinc inlet for introducing ultra-pure fine zinc powder into the secondary purification device.
The rotary kiln further comprises a secondary leaching and filter-pressing mechanism, wherein a material inlet of the secondary leaching and filter-pressing mechanism is communicated with a filter residue outlet of the primary leaching and filter-pressing mechanism, and a filter residue outlet of the secondary leaching and filter-pressing mechanism is communicated with the rotary kiln.
Further, the second leaching filter-pressing mechanism comprises a secondary leaching device and a second filter-pressing device, wherein a material inlet of the secondary leaching device is communicated with a filter residue outlet of the first leaching filter-pressing mechanism, a material outlet of the secondary leaching device is communicated with a material inlet of the second filter-pressing mechanism, and a filter residue outlet of the second filter-pressing mechanism is communicated with the rotary kiln.
Further, a flue gas outlet of the rotary kiln is communicated to a bag-type dust collector after heat exchange through the waste heat boiler, and a gas outlet of the bag-type dust collector is communicated to a desulfurization device;
and a dust outlet of the bag-type dust remover is communicated to the slurrying device.
Further, the primary leaching device is also provided with an ammonium bicarbonate feeding hole for adding ammonium bicarbonate and sodium bicarbonate into the primary leaching device.
And further, a filter residue outlet of the third filter pressing device and a filter residue outlet of the fourth filter pressing device are communicated to a lead recovery system.
Further, a waste residue outlet of the electrolysis device is communicated to the rotary kiln.
Further, a waste liquid outlet of the electrolysis device is communicated to the slurrying device; the rotary kiln is also provided with a low-zinc blast furnace ash and coke powder inlet.
The invention has the beneficial effects that:
the waste heat recovery treatment is carried out on the high-temperature flue gas of the rotary kiln through the waste heat boiler and the low-temperature power generation device, and the waste heat is converted into electric energy to be used for the electric energy of the electrolysis device, so that the energy is greatly saved, and the electric energy supply for the electrolytic zinc production is self-sufficient as far as possible.
Drawings
FIG. 1 is a flow diagram of the electrolytic zinc production process of the present invention;
FIG. 2 is a schematic structural diagram of an electrolytic zinc production system of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
As shown in FIG. 1, the embodiment of the invention discloses a method for self-application of steel low-zinc-ash dangerous waste heat power generation to electrolytic zinc production, which comprises the following steps:
step one, slurrying zinc ash, zinc slag and/or crude zinc oxide in a slurrying device to obtain slurried ore liquid, wherein the zinc ash, the zinc slag and/or the crude zinc oxide are prepared from raw materials according to a solid-to-liquid ratio of 1: 3-5 pulping;
adding ammonium bicarbonate and sodium bicarbonate into the slurried ore liquid, and leaching and filter-pressing the slurry in a first leaching and filter-pressing mechanism to obtain a first filtrate and a first filter residue; wherein the mass ratio of the ammonium bicarbonate to the sodium bicarbonate is 3:1, and the addition amount of the ammonium bicarbonate to the sodium bicarbonate is 4-10% of the mass of the slurried ore liquid;
adding zinc into the three-way first filtrate, and purifying and filter-pressing in a purifying filter-pressing mechanism to obtain fourth filtrate and fourth filter residue; introducing the first filter residue, low-zinc blast furnace ash and coke powder into a rotary kiln for treatment;
adding the first filter residue into a second leaching and filter-pressing mechanism for secondary leaching and filter-pressing, and adding the obtained second filter residue into a rotary kiln for treatment, wherein the addition amount is 5-10% of the total mass of the rotary kiln; when the low-zinc blast furnace dust and the coke powder are treated in the rotary kiln, the volume ratio of the low-zinc blast furnace dust to the coke powder is 7: 3. Firstly, adding zinc particles or zinc powder into the first filtrate, carrying out coarse purification and then filter pressing to obtain a third filtrate and a third filter residue, adding ultra-pure fine zinc powder into the third filtrate, carrying out secondary purification and then filter pressing to obtain a fourth filtrate and a fourth filter residue.
Step four, introducing the fourth filtrate into an electrolysis device for electrolysis treatment to obtain electrolytic zinc, electrolytic waste liquid and electrolytic waste residues;
the flue gas outlet of the rotary kiln is communicated with a waste heat boiler for heat exchange, steam of the waste heat boiler is communicated with a low-temperature power generation device for power generation, and electric energy generated by the low-temperature power generation device enters an electrolytic cell of an electrolysis device. Preferably, the waste electrolyte solution is introduced into a slurrying device; and introducing the electrolytic waste residue into a rotary kiln. The flue gas outlet of the rotary kiln is communicated to a bag-type dust remover for dust removal after heat exchange through the waste heat boiler, and the gas after dust removal is communicated to a desulfurization device for desulfurization; and adding crude zinc oxide obtained from a dust outlet of the bag-type dust remover into the slurrying device. And introducing the obtained third filter residue and fourth filter residue into a lead recovery system to recover lead.
As shown in fig. 2, the embodiment of the invention also discloses a system for generating power by using waste heat of iron and steel low-zinc-ash dangerous waste for electrolytic zinc production, which comprises a slurrying device, a first leaching and filter-pressing mechanism, a rotary kiln, a purifying and filter-pressing mechanism, an electrolysis device, a waste heat boiler and a low-temperature power generation device; wherein, the material outlet of the slurrying device is communicated with the material inlet of the first leaching and filter-pressing mechanism; a filter residue outlet of the first leaching and filter-pressing mechanism is communicated to the rotary kiln; the filtrate outlet of the first leaching and filter-pressing mechanism is communicated to the material inlet of the purifying and filter-pressing mechanism; a filtrate outlet of the purifying and filter-pressing mechanism is communicated with an electrolyte inlet of the electrolysis device; the smoke outlet of the rotary kiln is communicated to a waste heat boiler to provide a heat source for the waste heat boiler, the steam outlet of the waste heat boiler is communicated with a low-temperature power generation device, and the low-temperature power generation device is connected with the electrolysis device.
In some embodiments of the invention, the primary leaching filter press mechanism comprises a primary leaching device and a first filter press device, wherein the material outlet of the slurrying device is communicated with the material inlet of the primary leaching device, the material outlet of the primary leaching device is communicated with the first filter press device, the filter residue outlet of the first filter press device is communicated with the rotary kiln, and the filtrate outlet of the first filter press device is communicated with the material inlet of the purifying filter press mechanism.
In some embodiments of the invention, the purification filter press mechanism comprises a primary purification device, a third filter press device, a secondary purification device, and a fourth filter press device, wherein,
the material inlet of the coarse purification device is communicated with the filtrate outlet of the first leaching and filter-pressing mechanism, and the coarse purification device is also provided with a coarse purification zinc inlet for introducing zinc particles or zinc powder into the coarse purification device;
a material outlet of the coarse purification device is communicated to a material inlet of the third filter pressing device, a filtrate outlet of the third filter pressing device is communicated to a material inlet of the secondary purification device, a material outlet of the secondary purification device is communicated to the fourth filter pressing device, and a filtrate outlet of the fourth filter pressing device is communicated to the electrolysis device;
and the secondary purification device is provided with a secondary purification zinc inlet for introducing ultra-pure fine zinc powder into the secondary purification device.
In some embodiments, the rotary kiln further comprises a secondary leaching filter-press mechanism, wherein a material inlet of the secondary leaching filter-press mechanism is communicated with a filter residue outlet of the primary leaching filter-press mechanism, and a filter residue outlet of the secondary leaching filter-press mechanism is communicated with the rotary kiln.
In some embodiments of the invention, the secondary leach filter press comprises a secondary leach device and a secondary filter press, wherein the secondary leach device has a material inlet in communication with the residue outlet of the primary leach filter press, the secondary leach device has a material outlet in communication with the material inlet of the secondary filter press, and the residue outlet of the secondary filter press is in communication with the rotary kiln.
In some embodiments of the invention, a flue gas outlet of the rotary kiln is communicated to a bag-type dust collector after heat exchange is carried out through the waste heat boiler, and a gas outlet of the bag-type dust collector is communicated to a desulfurization device; and a dust outlet of the bag-type dust remover is communicated to the slurrying device. And the primary leaching device is also provided with an ammonium bicarbonate feeding hole for adding ammonium bicarbonate and sodium bicarbonate into the primary leaching device. And a filter residue outlet of the third filter pressing device and a filter residue outlet of the fourth filter pressing device are communicated to a lead recovery system. And a waste residue outlet of the electrolysis device is communicated to the rotary kiln. A waste liquid outlet of the electrolysis device is communicated to the slurrying device; the rotary kiln is also provided with a low-zinc blast furnace ash and coke powder inlet.
Example 1
A method for generating electricity by waste heat of hazardous wastes with low zinc ash in steel and iron for producing electrolytic zinc comprises the steps of slurrying zinc ash, zinc slag and crude zinc oxide in a slurrying pool or a slurrying tank, adding ammonium bicarbonate (the mass ratio of ammonium bicarbonate to sodium bicarbonate is 3:1) into a slurried mineral liquid, leaching in a leaching tank, mechanically stirring in the leaching process, feeding into a filter pressing system after stirring, and dividing into a first filtrate and a first filter residue; leaching the first filter residue for the second time, performing filter pressing, feeding the filter-pressed second filter residue into a rotary kiln, adding zinc particles or zinc powder into the first filtrate for coarse purification, and performing secondary filter pressing after coarse purification; the third filter residue after the secondary filter pressing is high lead slag, the high lead slag enters a lead recovery system, and the third filtrate after the secondary filter pressing is added with ultra-pure fine zinc powder for secondary purification; carrying out third filter pressing after secondary purification, wherein fourth filter residue obtained after the third filter pressing is lead-cadmium slag, and the lead-cadmium slag is sent into a lead recovery system; feeding the fourth filtrate subjected to third filter pressing into an electrolytic cell to obtain electrolytic zinc; returning the electrolytic waste liquid to the pulping tank or pulping tank; the waste residue after electrolysis enters a rotary kiln; adding low-zinc blast furnace dust and reducing agent coke powder into a rotary kiln, and arranging a natural gas burner or coke oven gas at the kiln head of the rotary kiln for supplementing heat to the rotary kiln; high-temperature flue gas at the tail of the rotary kiln enters a waste heat boiler, so that the waste heat boiler generates steam, and the steam is sent to a low-temperature power generating unit system; the steam is used for providing power for a steam turbine in the low-temperature generator set system, and electric energy generated by the low-temperature generator set system enters the electrolytic cell; flue gas of the waste heat boiler enters a cloth bag dust collector, collected dust tail crude zinc oxide returns to a slurrying pool or a slurrying tank, and dedusted gas enters a desulfurizing tower and is discharged in a qualified mode.
In summary, in the embodiment of the present invention, the settling chamber and the herringbone pipe groove in the prior art are removed and replaced with the waste heat boiler and the power generation device, the waste heat boiler can produce steam and collect oxides and dust, and the SCR denitration device can be arranged between the waste heat boiler and the economizer, so that the tail gas meets the environmental protection requirement, the denitration environmental protection problem of the tail gas can be solved, the electric energy can be provided for the electrolysis device, and the electric energy of the zinc oxide production system can achieve self-sufficiency.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (10)
1. A method for generating electricity by using waste heat of low-zinc-ash hazardous wastes of steel and iron for producing electrolytic zinc is characterized by comprising the following steps:
firstly, slurrying zinc ash, zinc slag and/or crude zinc oxide in a slurrying device to obtain slurried mineral liquid;
adding ammonium bicarbonate and sodium bicarbonate into the slurried ore liquid, and leaching and filter-pressing the slurry in a first leaching and filter-pressing mechanism to obtain a first filtrate and a first filter residue;
adding zinc particles or zinc powder into the three-way first filtrate, and purifying and filter-pressing in a purifying filter-pressing mechanism to obtain fourth filtrate and fourth filter residue; introducing the first filter residue, low-zinc blast furnace ash and coke powder into a rotary kiln for treatment;
step four, introducing the fourth filtrate into an electrolysis device for electrolysis treatment to obtain electrolytic zinc, electrolytic waste liquid and electrolytic waste residues;
the flue gas outlet of the rotary kiln is communicated with a waste heat boiler for heat exchange, steam of the waste heat boiler is communicated with a low-temperature power generation device for power generation, and electric energy generated by the low-temperature power generation device enters an electrolytic cell of an electrolysis device.
2. The method according to claim 1, wherein in step three, the first filter residue is added into a secondary leaching and filter pressing mechanism for secondary leaching and filter pressing, the obtained second filter residue is added into a rotary kiln for treatment, and the second filtrate is merged into the first filtrate for purification and filter pressing.
3. The method as claimed in claim 1, wherein in the third step, zinc particles or zinc powder is added into the first filtrate, coarse purification and filter pressing are carried out to obtain a third filtrate and a third filter residue, and ultra-pure fine zinc powder is added into the third filtrate, secondary purification and filter pressing are carried out to obtain a fourth filtrate and a fourth filter residue.
4. The method of claim 1, wherein the electrolytic spent liquor is passed to a slurrying device; and introducing the electrolytic waste residue into a rotary kiln to form closed circulation.
5. The method as claimed in claim 1, wherein the flue gas outlet of the rotary kiln is communicated to a bag-type dust remover for dust removal after heat exchange through the waste heat boiler, and the gas after dust removal is communicated to a desulfurization device for desulfurization; and adding crude zinc oxide obtained from a dust outlet of the bag-type dust remover into the slurrying device.
6. The method according to claim 1, wherein the zinc ash, the zinc slag and/or the crude zinc oxide raw material are mixed according to a solid-to-liquid ratio of 1: (3-5) pulping; in the second step, the ammonium bicarbonate and the sodium bicarbonate are added according to the mass ratio of 3:1, wherein the mass ratio of the ammonium bicarbonate to the sodium bicarbonate is 4% -10% of the mass of the zinc ash, the zinc slag and/or the crude zinc oxide raw material.
7. The method according to claim 3, wherein the obtained third filter residue and fourth filter residue are passed to a lead recovery system for recovering lead.
8. The method as claimed in claim 1, wherein the low zinc blast furnace dust and the coke powder are treated in a rotary kiln in a volume ratio of 7: and 3, adding the second filter residue into a rotary kiln for treatment according to 5-10% of the total amount of the treated material.
9. The utility model provides a low zinc ash danger waste heat power generation of steel is used for electrolytic zinc production system which characterized in that includes:
the device comprises a slurrying device, a first leaching and filter-pressing mechanism, a rotary kiln, a purifying and filter-pressing mechanism, an electrolysis device, a waste heat boiler and a low-temperature power generation device; wherein,
the material outlet of the slurrying device is communicated with the material inlet of the first leaching and filter-pressing mechanism;
a filter residue outlet of the first leaching and filter-pressing mechanism is communicated to the rotary kiln;
the filtrate outlet of the first leaching and filter-pressing mechanism is communicated to the material inlet of the purifying and filter-pressing mechanism;
a filtrate outlet of the purifying and filter-pressing mechanism is communicated with an electrolyte inlet of the electrolysis device;
the smoke outlet of the rotary kiln is communicated to a waste heat boiler to provide a heat source for the waste heat boiler, the steam outlet of the waste heat boiler is communicated with a low-temperature power generation device, and the low-temperature power generation device is connected with the electrolysis device.
10. The system according to claim 9, wherein said primary leach filter press mechanism comprises a primary leach unit and a primary filter press unit, wherein,
a material outlet of the slurrying device is communicated with a material inlet of the primary leaching device, a material outlet of the primary leaching device is communicated with the first filter pressing device, a filter residue outlet of the first filter pressing device is communicated with the rotary kiln, and a filtrate outlet of the first filter pressing device is communicated with a material inlet of the purifying filter pressing mechanism;
the purifying and filter-pressing mechanism comprises a coarse purifying device, a third filter-pressing device, a secondary purifying device and a fourth filter-pressing device, wherein,
the material inlet of the coarse purification device is communicated with the filtrate outlet of the first leaching and filter-pressing mechanism, and the coarse purification device is also provided with a coarse purification zinc inlet for introducing zinc particles or zinc powder into the coarse purification device;
a material outlet of the coarse purification device is communicated to a material inlet of the third filter pressing device, a filtrate outlet of the third filter pressing device is communicated to a material inlet of the secondary purification device, a material outlet of the secondary purification device is communicated to the fourth filter pressing device, and a filtrate outlet of the fourth filter pressing device is communicated to the electrolysis device;
and the secondary purification device is provided with a secondary purification zinc inlet for introducing ultra-pure fine zinc powder into the secondary purification device.
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| CN2018114178084 | 2018-11-26 | ||
| CN201811417808 | 2018-11-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807665A (en) * | 2005-01-18 | 2006-07-26 | 况正国 | Method for electrolyzing zinc by alkaline leaching method |
| CN102492856A (en) * | 2011-12-28 | 2012-06-13 | 株洲冶炼集团股份有限公司 | Method for reducing water-soluble zinc in zinc-containing slag produced in zinc hydrometallurgy |
| CN102634656A (en) * | 2012-04-19 | 2012-08-15 | 四川大学 | Method for preparing electrolytic manganese/electrolytic manganese dioxide by cyclically leaching manganese oxide with sulfur and calcium |
| CN103627911A (en) * | 2013-12-09 | 2014-03-12 | 株洲冶炼集团股份有限公司 | Treatment process for high-iron zinc oxide |
| WO2014181833A1 (en) * | 2013-05-08 | 2014-11-13 | 株式会社キノテック・ソーラーエナジー | Zinc production method |
| CN105689360A (en) * | 2016-03-03 | 2016-06-22 | 中冶东方工程技术有限公司 | System and technology utilizing converter gas for gasifying household refuse to achieve incineration and power generation |
| CN107245573A (en) * | 2017-06-21 | 2017-10-13 | 云南罗平锌电股份有限公司 | A kind of synthetical recovery zinc from Second-rate zinc oxide powder, germanium, lead, the method for silver |
| CN107419111A (en) * | 2017-08-14 | 2017-12-01 | 贵州省兴安环保科技有限公司 | A kind of method that production zinc powder is leached in alloy zinc gray in-pulp electrolysis |
| CN107699693A (en) * | 2017-09-29 | 2018-02-16 | 南丹县南方有色金属有限责任公司 | A kind of improved method of secondary cobalt nickel treatment technology of leached residue |
| CN209669311U (en) * | 2018-11-26 | 2019-11-22 | 山西锌创研环境科技有限公司 | The system that a kind of low zinc gray dangerous waste object cogeneration of steel is used for electrolytic zinc production |
-
2019
- 2019-03-06 CN CN201910169222.9A patent/CN109797280A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1807665A (en) * | 2005-01-18 | 2006-07-26 | 况正国 | Method for electrolyzing zinc by alkaline leaching method |
| CN102492856A (en) * | 2011-12-28 | 2012-06-13 | 株洲冶炼集团股份有限公司 | Method for reducing water-soluble zinc in zinc-containing slag produced in zinc hydrometallurgy |
| CN102634656A (en) * | 2012-04-19 | 2012-08-15 | 四川大学 | Method for preparing electrolytic manganese/electrolytic manganese dioxide by cyclically leaching manganese oxide with sulfur and calcium |
| WO2014181833A1 (en) * | 2013-05-08 | 2014-11-13 | 株式会社キノテック・ソーラーエナジー | Zinc production method |
| CN103627911A (en) * | 2013-12-09 | 2014-03-12 | 株洲冶炼集团股份有限公司 | Treatment process for high-iron zinc oxide |
| CN105689360A (en) * | 2016-03-03 | 2016-06-22 | 中冶东方工程技术有限公司 | System and technology utilizing converter gas for gasifying household refuse to achieve incineration and power generation |
| CN107245573A (en) * | 2017-06-21 | 2017-10-13 | 云南罗平锌电股份有限公司 | A kind of synthetical recovery zinc from Second-rate zinc oxide powder, germanium, lead, the method for silver |
| CN107419111A (en) * | 2017-08-14 | 2017-12-01 | 贵州省兴安环保科技有限公司 | A kind of method that production zinc powder is leached in alloy zinc gray in-pulp electrolysis |
| CN107699693A (en) * | 2017-09-29 | 2018-02-16 | 南丹县南方有色金属有限责任公司 | A kind of improved method of secondary cobalt nickel treatment technology of leached residue |
| CN209669311U (en) * | 2018-11-26 | 2019-11-22 | 山西锌创研环境科技有限公司 | The system that a kind of low zinc gray dangerous waste object cogeneration of steel is used for electrolytic zinc production |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN116734624B (en) * | 2023-08-15 | 2024-01-05 | 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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