CN112430741A - Method for recovering zinc oxide from blast furnace cloth bag dust - Google Patents

Method for recovering zinc oxide from blast furnace cloth bag dust Download PDF

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Publication number
CN112430741A
CN112430741A CN202011386553.7A CN202011386553A CN112430741A CN 112430741 A CN112430741 A CN 112430741A CN 202011386553 A CN202011386553 A CN 202011386553A CN 112430741 A CN112430741 A CN 112430741A
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blast furnace
cloth bag
zinc oxide
furnace cloth
parts
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CN202011386553.7A
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Inventor
王宝祥
沈毅
李锋锋
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Tangshan Huaxian Technology Co ltd
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Tangshan Huaxian Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02Working-up flue dust
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/005Preliminary treatment of scrap
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/02Roasting processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/2406Binding; Briquetting ; Granulating pelletizing
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/242Binding; Briquetting ; Granulating with binders
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/30Obtaining zinc or zinc oxide from metallic residues or scraps
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/34Obtaining zinc oxide
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001Dry processes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a method for recovering zinc oxide from blast furnace cloth bag fly ash, and relates to the technical field of recycling treatment of blast furnace cloth bag fly ash. The recovery method comprises the steps of adding a novel binder, lime, activated carbon and other raw materials into the fly ash, carrying out high-temperature reduction and combustion oxidation to generate zinc oxide steam, and carrying out cooling and recovery to obtain the zinc oxide. The recovery treatment process can recover more than 95% of zinc oxide in blast furnace cloth bag dust, is simple and convenient to operate, and can be used for large-scale mass production.

Description

Method for recovering zinc oxide from blast furnace cloth bag dust
Technical Field
The invention relates to the technical field of recycling treatment of blast furnace cloth bag fly ash, in particular to a method for recovering zinc oxide from blast furnace cloth bag fly ash.
Background
Many processes in ferrous metallurgy produce a large amount of dust and its by-products, collectively known as fly ash. The accumulated and flying dust can cause serious pollution to the factory and the surrounding environment, and can also have great harm to the ecological environment of the surrounding farmland.
The blast furnace cloth bag dedusting ash mainly has the following characteristics:
(1) the particle size is small, the specific gravity is light, the sieving rate of a common 200-mesh sieve is 50-65%, and even is finer, so that the particles are easy to float in the atmosphere and seriously pollute the surrounding environment;
(2) the catalyst is easy to react, contains more low-boiling-point metals with small particle sizes, and is easy to react with oxygen in the air to generate spontaneous combustion when contacting the air;
(3) highly corrosive, alkaline and alkaline earth metals, such as K, are present in considerable amounts in the blast furnace gas sludge2O、Na2O, CaO, MgO, etc., which are easily hydrated to form hydroxides and are alkaline;
(4) the chemical toxicity is high, for example, the Shao steel gas mud, the comprehensive toxicity coefficient reaches 12.16, which exceeds 11.16 times of the specification of identifying harmful substances;
(5) unique crystal phase, difficult separation and great difficulty in separating valuable metals.
The blast furnace cloth bag dust typically contains about 6% zinc oxide, which is derived from iron ore. The sintered ore is mainly zinc ferrite ZnO-Fe2O3Or (ZnFe) O. Fe2O3]And Zn is quickly reduced after the alloy is fed into the furnace. The reduced zinc is volatilized quickly and can also circulate in the furnace, the Zn is volatilized to the upper part and is oxidized again into ZnO, part of the ZnO is carried away by coal gas, and part of the ZnO descends along with the furnace burden and circulates. Zn vapor permeating into the furnace lining is cooled down in the furnace lining and oxidized into ZnO, and the volume expansion destroys the furnace wall. ZnO accumulated on the inner wall and the ascending pipe can also generate furnace accretion, which brings adverse effect to the production of the blast furnace, so that the feeding of Zn into the furnace is strictly controlled. Therefore, in order to fully utilize the blast furnace cloth bag ash, the contained zinc oxide needs to be recycled.
Disclosure of Invention
Based on the problems, the invention aims to provide a method for recovering zinc oxide from blast furnace cloth bag dust. The method is a direct recovery method, and is characterized in that a novel binder, lime, activated carbon and other raw materials are added into dust, and are subjected to high-temperature reduction, combustion and oxidation to generate zinc oxide steam, and the zinc oxide is recovered after cooling. The recovery treatment process can recover more than 95% of zinc oxide in blast furnace cloth bag dust, is simple and convenient to operate, and can be used for large-scale mass production.
The method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dedusting ash;
s2, adding water into the sieved blast furnace cloth bag dedusting ash for ball milling treatment;
s3, drying the blast furnace cloth bag dedusting ash after ball milling, performing magnetic mineral separation, and recovering iron;
s4, adding 3-7 wt% of binder, 1-4 wt% of lime, 5-10 wt% of activated carbon and 2-5 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; the adhesive comprises the following raw materials in parts by weight:
5-25 parts of sugar residues, namely,
5-20 parts of starch, namely,
1-3 parts of magnesium chloride, namely,
0.1 to 1.5 portions of carbonate,
10-20 parts of sodium carboxymethyl cellulose,
10-20 parts of polyacrylamide;
s5, drying the blast furnace cloth bag fly ash pellets;
s6, calcining the dried pellets at high temperature;
s7, oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
Preferably, step S1 is to pass the blast furnace cloth bag dust through 200-500 mesh sieve.
Preferably, the surfactants described in step S3 are anionic surfactants and nonionic surfactants.
Further preferably, the mass ratio of the anionic surfactant to the nonionic surfactant is 3-5: 1.
More preferably, the anionic surfactant is sodium dodecylbenzenesulfonate. The nonionic surfactant is one of ceteareth-10, polysorbate-20, and glyceryl stearate.
Preferably, the carbonate is one of calcium carbonate, sodium carbonate and potassium carbonate.
Preferably, the drying temperature in step S5 is 50-100 ℃.
Further preferably, the drying time in step S5 is 60-240 min.
Preferably, the high-temperature calcination temperature in step S6 is 850-900 ℃, and the calcination time is 10-30 min.
Compared with the prior art, the invention has the following beneficial effects:
(1) the purity of zinc oxide recovered from the blast furnace cloth bag dust is as high as 99.5%, and the recovery rate of zinc oxide is more than 95%, so that zinc in the dust is effectively recovered;
(2) the recovery process has strong operability, no wastewater and harmful gas release, safety and environmental protection.
Detailed Description
The invention provides a method for recovering zinc oxide from blast furnace cloth bag dust, which comprises the following steps:
s1, screening the blast furnace cloth bag dedusting ash;
s2, adding water into the sieved blast furnace cloth bag dedusting ash for ball milling treatment;
s3, drying the blast furnace cloth bag dedusting ash after ball milling, performing magnetic mineral separation, and recovering iron;
s4, adding 3-7 wt% of binder, 1-4 wt% of lime, 5-10 wt% of activated carbon and 2-5 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; the adhesive comprises the following raw materials in parts by weight:
5-25 parts of sugar residues, namely,
5-20 parts of starch, namely,
1-3 parts of magnesium chloride, namely,
0.1 to 1.5 portions of carbonate,
10-20 parts of sodium carboxymethyl cellulose,
10-20 parts of polyacrylamide;
s5, drying the blast furnace cloth bag fly ash pellets;
s6, calcining the dried pellets at high temperature;
s7, oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
In some embodiments, step S1 is performed by sieving the blast furnace bag dust through a 200-500 mesh sieve.
In some embodiments, the surfactants described in step S3 of the present invention are anionic surfactants and nonionic surfactants. Wherein the mass ratio of the anionic surfactant to the nonionic surfactant is 3-5: 1. Preferably, the anionic surfactant is sodium dodecylbenzenesulfonate. The nonionic surfactant is one of ceteareth-10, polysorbate-20, and glyceryl stearate.
In some embodiments, the carbonate in the binder used in the present invention is one of calcium carbonate, sodium carbonate, and potassium carbonate.
In some embodiments, the drying temperature in step S5 of the present invention is 50-100 ℃, and the drying time is 60-240 min.
In some embodiments, the high temperature calcination temperature in step S6 of the present invention is 850-900 deg.C, and the calcination time is 10-30 min.
The present invention will be further described with reference to the following specific examples.
Example 1
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dust through a 300-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 2 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 50 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 5 wt% of binder, 1 wt% of lime, 10 wt% of activated carbon and 3 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the binder consists of the following raw materials in parts by weight: 15 parts of sugar residues, 8 parts of starch, 2 parts of magnesium chloride, 1.0 part of calcium carbonate, 20 parts of sodium carboxymethylcellulose and 15 parts of polyacrylamide; wherein the surface active carbon is formed by mixing sodium dodecyl benzene sulfonate and ceteareth-10 according to the mass ratio of 3: 1;
s5, drying the blast furnace cloth bag fly ash pellets at the temperature of 80 ℃ for 120 min;
s6, calcining the dried pellets for 20min at 900 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 99.9%, and the recovery rate of the zinc oxide is as high as 98.2%.
Example 2
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dust-removing ash through a 200-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 4 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 50 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 7 wt% of binder, 3 wt% of lime, 10 wt% of activated carbon and 2 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the binder consists of the following raw materials in parts by weight: 5 parts of sugar residues, 15 parts of starch, 1 part of magnesium chloride, 0.5 part of potassium carbonate, 10 parts of sodium carboxymethylcellulose and 20 parts of polyacrylamide; wherein the surfactant is prepared by mixing sodium dodecyl benzene sulfonate and polysorbate-20 according to the mass ratio of 5: 1;
s5, drying the blast furnace cloth bag fly ash pellets for 60min at the temperature of 100 ℃;
s6, calcining the dried pellets for 30min at 850 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 99.9%, and the recovery rate of the zinc oxide is as high as 96.7%.
Example 3
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dedusting ash through a 500-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 5 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 50 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 6 wt% of binder, 3 wt% of lime, 5 wt% of activated carbon and 4 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the binder consists of the following raw materials in parts by weight: 25 parts of sugar residues, 5 parts of starch, 2 parts of magnesium chloride, 1.5 parts of sodium carbonate, 20 parts of sodium carboxymethylcellulose and 20 parts of polyacrylamide; wherein the surfactant is prepared by mixing sodium dodecyl benzene sulfonate and glycerol stearate according to the mass ratio of 4: 1;
s5, drying the blast furnace cloth bag fly ash pellets at the temperature of 50 ℃ for 240 min;
s6, calcining the dried pellets for 10min at 900 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 99.9%, and the recovery rate of the zinc oxide is as high as 97.5%.
Example 4
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dust-removing ash through a 200-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 3 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 60 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 7 wt% of binder, 4 wt% of lime, 8 wt% of activated carbon and 3.5 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the binder consists of the following raw materials in parts by weight: 12 parts of sugar residues, 15 parts of starch, 3 parts of magnesium chloride, 0.1 part of sodium carbonate, 15 parts of sodium carboxymethylcellulose and 15 parts of polyacrylamide; wherein the surfactant is prepared by mixing sodium dodecyl benzene sulfonate and polysorbate-20 according to the mass ratio of 3: 1;
s5, drying the blast furnace cloth bag fly ash pellets for 200min at the temperature of 70 ℃;
s6, calcining the dried pellets for 20min at 900 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 99.9%, and the recovery rate of the zinc oxide is as high as 98.2%.
Example 5
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dedusting ash through a 500-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 5 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 60 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 5 wt% of binder, 2 wt% of lime, 7 wt% of activated carbon and 2 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the binder consists of the following raw materials in parts by weight: 25 parts of sugar residues, 20 parts of starch, 1 part of magnesium chloride, 0.3 part of calcium carbonate, 20 parts of sodium carboxymethylcellulose and 10 parts of polyacrylamide; wherein the surfactant is prepared by mixing sodium dodecyl benzene sulfonate and polysorbate-20 according to the mass ratio of 4: 1;
s5, drying the blast furnace cloth bag fly ash pellets for 240min at the temperature of 100 ℃;
s6, calcining the dried pellets for 30min at 900 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
Through detection, the purity of the zinc oxide solid obtained by the process is 99.9%, and the recovery rate of the zinc oxide is as high as 95%.
Comparative example 1
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dust-removing ash through a 200-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 4 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 50 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 10 wt% of activated carbon into the blast furnace cloth bag fly ash treated in the step S3, and adding a proper amount of water to prepare pellets;
s5, drying the blast furnace cloth bag fly ash pellets for 60min at the temperature of 100 ℃;
s6, calcining the dried pellets for 30min at 850 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 82.1%, and the recovery rate of the zinc oxide is up to 77.4%.
Comparative example 2
A method for recovering zinc oxide from blast furnace cloth bag dust includes the following steps:
s1, screening the blast furnace cloth bag dust through a 300-mesh sieve;
s2, adding water into the sieved blast furnace cloth bag dedusting ash to perform ball milling treatment for 2 hours;
s3, drying the blast furnace cloth bag dedusting ash subjected to ball milling treatment at the temperature of 50 ℃ for 24 hours, performing magnetic mineral separation, and recovering iron;
s4, adding 1 wt% of lime, 10 wt% of activated carbon and 3 wt% of surfactant into the blast furnace cloth bag fly ash treated in the step S3, and adding a proper amount of water to prepare pellets; wherein the surface active carbon is formed by mixing sodium dodecyl benzene sulfonate and ceteareth-10 according to the mass ratio of 3: 1;
s5, drying the blast furnace cloth bag fly ash pellets at the temperature of 80 ℃ for 120 min;
s6, calcining the dried pellets for 20min at 900 ℃;
s7, fully oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
The detection proves that the purity of the zinc oxide solid obtained by the process is 89.4%, and the recovery rate of the zinc oxide is as high as 83.6%.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. A method for recovering zinc oxide from blast furnace cloth bag dust is characterized by comprising the following steps:
s1, screening the blast furnace cloth bag dedusting ash;
s2, adding water into the sieved blast furnace cloth bag dedusting ash for ball milling treatment;
s3, drying the blast furnace cloth bag dedusting ash after ball milling, performing magnetic mineral separation, and recovering iron;
s4, adding 3-7 wt% of binder, 1-4 wt% of lime, 5-10 wt% of activated carbon and 2-5 wt% of surfactant into the blast furnace cloth bag dedusting ash treated in the step S3, and adding a proper amount of water to prepare pellets; the adhesive comprises the following raw materials in parts by weight:
5-25 parts of sugar residues, namely,
5-20 parts of starch, namely,
1-3 parts of magnesium chloride, namely,
0.1 to 1.5 portions of carbonate,
10-20 parts of sodium carboxymethyl cellulose,
10-20 parts of polyacrylamide;
s5, drying the blast furnace cloth bag fly ash pellets;
s6, calcining the dried pellets at high temperature;
s7, oxidizing the zinc steam obtained after calcination with air to obtain zinc oxide gas;
and S8, cooling and recovering zinc oxide solids.
2. The method for recovering zinc oxide from blast furnace cloth bag dedusting ash according to claim 1, wherein step S1 is that the blast furnace cloth bag dedusting ash is processed by 200-500 mesh sieve.
3. The method for recovering zinc oxide from blast furnace cloth bag dust according to claim 1, wherein the surfactant in step S3 is anionic surfactant and nonionic surfactant.
4. The method for recovering zinc oxide from blast furnace cloth bag dedusting ash according to claim 3, characterized in that the mass ratio of the anionic surfactant to the nonionic surfactant is 3-5: 1.
5. The method for recovering zinc oxide from blast furnace cloth bag dust according to claim 4, wherein the anionic surfactant is sodium dodecyl benzene sulfonate.
6. The method for recovering zinc oxide from blast furnace cloth bag dust according to claim 4, wherein the nonionic surfactant is one of ceteareth-10, polysorbate-20 and glyceryl stearate.
7. The method for recovering zinc oxide from blast furnace cloth bag dedusting ash according to claim 1, characterized in that the carbonate is one of calcium carbonate, sodium carbonate and potassium carbonate.
8. The method for recovering zinc oxide from blast furnace cloth bag dust according to claim 1, wherein the drying temperature in step S5 is 50-100 ℃.
9. The method for recovering zinc oxide from blast furnace cloth bag dust according to claim 8, wherein the drying time in step S5 is 60-240 min.
10. The method for recovering zinc oxide from blast furnace cloth bag dedusting ash according to claim 1, wherein the high temperature calcination temperature in step S6 is 850-900 ℃, and the calcination time is 10-30 min.
CN202011386553.7A 2020-12-01 2020-12-01 Method for recovering zinc oxide from blast furnace cloth bag dust Pending CN112430741A (en)

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CN110055410A (en) * 2019-05-06 2019-07-26 安徽工业大学 A kind of electric furnace bag-type dust ash resource utilization method
CN110564957A (en) * 2019-10-21 2019-12-13 中冶节能环保有限责任公司 Treatment device and method for efficiently removing zinc from zinc-containing dedusting ash of iron and steel enterprises
CN111206158A (en) * 2020-03-02 2020-05-29 滦南丰淼环保科技有限公司 Method for recycling blast furnace cloth bag dedusting ash

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09241718A (en) * 1996-03-08 1997-09-16 Nkk Corp Method for recovering zinc oxide from zinc oxide-containing dust
CA2256135A1 (en) * 1997-12-18 1999-06-18 Kabushiki Kaisha Kobe Seiko Sho Method of producing reduced iron pellets
CN101092664A (en) * 2007-06-28 2007-12-26 南京钢铁联合有限公司 Method for processing dust with zinc of electric furnace
CN102329909A (en) * 2011-07-15 2012-01-25 中冶南方工程技术有限公司 Method for extracting iron particles and zinc powder from dust of steel and iron plant
CN107354297A (en) * 2016-05-09 2017-11-17 华东理工大学 A kind of compound binding agent and the powder pelletizing obtained by the compound binding agent
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