CN107460327A - A kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making - Google Patents
A kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making Download PDFInfo
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- CN107460327A CN107460327A CN201710633305.XA CN201710633305A CN107460327A CN 107460327 A CN107460327 A CN 107460327A CN 201710633305 A CN201710633305 A CN 201710633305A CN 107460327 A CN107460327 A CN 107460327A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
- C22B7/02—Working-up flue dust
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining zinc oxide
- C22B19/38—Obtaining zinc oxide in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
- C22B7/001—Dry processes
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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
Abstract
The invention provides a kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making, including：Pelletizing is made in leaded zinc powder dirt, reduction roasting is carried out at high temperature, lead zinc is reduced into simple substance and volatilize in a gaseous form, ferrous material then forms molten mass, so that lead zinc separates with ferrous material；Collect the gas and dust of leaded zinc, and by aoxidizing and cooling obtains thick lead oxide powder and tutty powder；Collect the ferrous material of de- lead zinc and iron material is obtained by quickly cooling, crushing and magnetic separation；Thick lead oxide powder, tutty powder are again placed in carry out high temperature sintering in rotary kiln, then the smart lead oxide powder of high-purity, smart Zinc oxide powder are obtained through peroxidating and cooling；Smart lead oxide powder, smart Zinc oxide powder first obtain lead chloride and zinc chloride with hydrochloric acid reaction, and lead chloride and zinc chloride finally give ceruse and zinc carbonate with sodium carbonate reaction again.Present invention process is simple, lead zinc recovery is high, overall resource recycling rate is high.
Description
Technical field
The present invention relates to iron and steel smelting technology field, the comprehensive reutilization of specially a kind of leaded zinc powder dirt of electric furnace steel making
Method.
Background technology
Electric furnace steel making dust is using steel as the dust, the tail gas that in the smelting process of primary raw material, occur in electric furnace
The powder of collected fine particle form in cooling procedure.There are higher iron content and lead in the leaded zinc powder dirt of electric furnace steel making
Zn content, the content of general lead are 1-7%, and the content of zinc is 15-35%, the content 10-40% of iron, and other poisonous metals
Such as cadmium, mercury, chromium etc..Lead, zinc are unfavorable to making steel, its cause in steel-making dust recycling inside the steel flow by
One definite limitation, with constantly recycling for leaded zinc powder dirt, Pb, Zn content improves constantly, when the leaded zinc of dust is higher,
Dross can occur in electric furnace, electric furnace is damaged.
At present, domestic electric furnace steel making Dust Capacity alreadys exceed ten million ton every year, and with the steel development in China, electricity
Stove Dust Capacity increases year by year.The electric furnace dust of the country 60% or so is to carry out landfill disposal, and not only substantial amounts of valuable metal is unrestrained
Take, and poisonous metal goes out with subsurface flow, causes serious environmental pollution.Electric furnace steel making dust contains higher iron and lead
Zinc, it is a kind of secondary resource of worth recycling.Iron can be used as iron material to recycle, and lead zinc metal can be widely applied to
Mechanical industry, metallurgical industry, electrical industry.Therefore, how high efficiente callback using the lead zinc in electric furnace steel making dust become in order to
The task of top priority.
In the prior art, recycle the lead zinc in electric furnace steel making dust and be calcined typically by high temperature reduction and cause lead zinc
Volatilize in a gaseous form, lead zinc fume is separated by aoxidizing solid phase again, so as to remove the lead zinc in dust, and reclaims the mixing of lead zinc
Raw material.Its lead element and Zn-ef ficiency are not sufficiently separated, and lead zinc mixture can only be collected as coarse raw material of industry utilization,
Its lead zinc recovery only has 90% or so, and resource utilization is very low.
The content of the invention
For in the prior art the defects of, the present invention provides a kind of comprehensive reutilization side of the leaded zinc powder dirt of electric furnace steel making
Method, the rate of recovery of lead zinc is high in its dust, overall resource utilization is high, can be in comprehensive reutilization dust it is various it is useful into
Point.
Technical solution of the present invention is as follows：
A kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making, its key are：Comprise the following steps：
Step 1: the leaded zinc powder dirt of electric furnace is incorporated a certain proportion of reducing agent, binding agent and water, after full and uniform mixing
It is manufactured into pelletizing；
Step 2: the pelletizing in step 1 is placed in rotary kiln, 1150-1250 DEG C of kiln temperature of control carries out reduction roasting
Burn, the lead in leaded zinc powder dirt and zinc be reduced into simple substance, and discharge rotary kiln in the form of a vapor, the valuable metal such as iron and
Other compositions then form molten mass by reduction roasting and stayed in rotary kiln；
Step 3: in collection step two from rotary kiln discharge the lead to volatilize in a gaseous form, zinc and other gases and
Dust, and by aoxidizing and cooling obtains thick lead oxide powder, tutty powder and collected, arranged outside residual exhaust；
Step 4: the molten mass stayed in collection step two in rotary kiln, and magnetic has been obtained by quickly cooling, crushing and magnetic separation
Property material and nonmagnetic material, the material that is magnetic collects as iron material, and nonmagnetic material is as cement raw material collection；
Step 5: the thick lead oxide powder collected in step 3, tutty powder are again placed in rotary kiln, control
1200-1300 DEG C of kiln temperature is sintered, and under hot environment, is entrained in thick lead oxide, the various impurity inside tutty
Major part evaporates, and lead zinc can also volatilize, then obtains the smart lead oxide powder of high-purity, smart zinc oxide through peroxidating and cooling
Powder is simultaneously collected, and is arranged outside residual exhaust；
Step 6: the smart lead oxide powder in step 5, smart Zinc oxide powder are added in hydrochloric acid solution, solution is controlled
PH value 2-3,50-70 DEG C of solution temperature, lead oxide and zinc oxide and hydrochloric acid reaction generation lead chloride and zinc chloride, lead chloride are molten
Xie Du is very low, forms precipitation in the solution, zinc is then deposited in the solution with Zinc ion form, so as to separate lead and zinc；
Step 7: powdered sodium carbonate is added to the water to form sodium carbonate liquor by a certain percentage, then by step 6
Lead chloride is added in the solution, controls solution ph 8-10,60-80 DEG C of temperature, reaction obtains ceruse precipitation, directly in step
Powdered sodium carbonate is added in liquor zinci chloridi in rapid six, reaction obtains zinc carbonate precipitation.
According to the above-mentioned technical solution：Lead in dust pelletizing and zinc are reduced to simple substance by the present invention by reduction roasting
And discharged in a gaseous form with flue gas, the valuable metal such as iron in dust pelletizing and other compositions then form molten mass and stay in revolution
In kiln, so that lead zinc departs from, lead zinc fume, by aoxidizing and cooling down, obtains thick lead oxide powder and thick oxidation outside rotary kiln
For zinc powder to reclaim, tail gas avoids the secondary pollution brought in removal process by being emptied after charcoal absorption.Have containing iron etc.
The molten mass of valency metal then obtains be magnetic material and nonmagnetic material by quickly cooling, crushing and magnetic separation, and be magnetic material conduct
Iron material is collected, and nonmagnetic material is collected as cement raw material, and the valuable metal comprehensive recovery such as iron reaches more than 95%, non-gold
Category resource recovery reaches more than 99%, resource is fully reclaimed and is utilized.
Obtained thick lead oxide powder, tutty powder are again placed in rotary kiln, control kiln temperature 1200-
1300 DEG C are sintered, and under hot environment, are entrained in thick lead oxide, the various impurity inside tutty largely volatilize
Come, lead zinc can also volatilize, then obtain the smart lead oxide powder of high-purity, smart Zinc oxide powder through peroxidating and cooling；By smart oxygen
Change that lead powder is last, smart Zinc oxide powder is added in hydrochloric acid solution, control the pH value 2-3 of solution, 50-70 DEG C of solution temperature, oxidation
Lead and zinc oxide and hydrochloric acid reaction generation lead chloride and zinc chloride, lead chloride solubility is very low, forms precipitation in the solution, zinc is then
Deposited in the solution with Zinc ion form, so as to separate lead and zinc；Powdered sodium carbonate is added to the water to form carbonic acid by a certain percentage
Sodium solution, then the lead chloride in step 6 is added in the solution, controls solution ph 8-10,60-80 DEG C of temperature, reaction
Obtain the ceruse precipitation of high-purity, directly liquor zinci chloridi in add powdered sodium carbonate, reaction obtains the carbon of high-purity
Sour zinc precipitation.From the above method, lead element and Zn-ef ficiency are further completely separated by the present invention by wet method, final product
Obtain the ceruse and zinc carbonate of high-purity, the purity of ceruse and zinc carbonate reaches more than 98%, and it can sell, and increases
Add economic benefit.In addition, the zinc carbonate of high-purity can be used as agriculture fertilizer raw material, later stage heat resolve can also be passed through
Zinc oxide and carbon dioxide are obtained, the high pure zinc oxide market price is high.The ceruse of high-purity is also the product of market in urgent need,
Industrial production raw material can be used as.The present invention is sufficiently separated lead zinc by wet method, lead zinc recovery more than 99%, resource reclaim
Rate is higher.
Further, the reducing agent in step 1 is coke and lime stone.Reducing agent source is wide, cheap, reduces work
Skill cost.
Further, the residual exhaust of step 3 and step 5 China and foreign countries row also empty after charcoal absorption.Avoid back
The secondary pollution brought during receipts.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art.In all of the figs, similar element
Or part is typically identified by similar reference.In accompanying drawing, each element or part might not be drawn according to the ratio of reality.
Fig. 1 is the process chart of the present invention.
Embodiment
Embodiments of the invention are described in further detail below in conjunction with the accompanying drawings.
In the electric furnace process that stainless steel is typically produced using iron as raw material, the electric furnace steel making dust occurred in smelting technology is
Put into the 1-2wt% of iron.Containing valuable metals such as many lead, zinc, iron, nickel, chromium in steel-making dust, while it can also contain cadmium,
A kind of harmful heavy metal such as mercury, chromium.
The main component of the common leaded zinc powder dirt of electric furnace steel making is as shown in the table：
| Composition | Zn | Fe | Pb | SiO2 | CaO | Al2O3 | Cl | F | Cd | Other |
| Wt% | 20-25 | 20-40 | 2-5 | 2-10 | 2-10 | 1-5 | 2-7 | 0.2-0.5 | 0.02-0.1 | Bal. |
As shown in figure 1, the comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making of the present invention,
Specifically comprise the following steps：
Step 1: the leaded zinc powder dirt of electric furnace is incorporated a certain proportion of reducing agent, binding agent and water, after full and uniform mixing
It is manufactured into pelletizing.Reducing agent is coke and lime stone in the present embodiment.
Step 2: the pelletizing in step 1 is placed in rotary kiln, 1150-1250 DEG C of kiln temperature of control carries out reduction roasting
Burn, the lead in leaded zinc powder dirt and zinc are reduced into simple substance, and discharge rotary kiln in the form of a vapor, iron and other compositions are then
Molten mass is formed by reduction roasting to stay in rotary kiln.
Step 3: in collection step two from rotary kiln discharge the lead to volatilize in a gaseous form, zinc and other gases and
Dust, and by aoxidizing and cooling obtains thick lead oxide powder, tutty powder and collected, residual exhaust is inhaled through activated carbon
Attached outer row.
By taking Zn-ef ficiency as an example, the specific reflection chemical equation in step 2 and step 3 is as follows：
C(s)+O2(g)=CO2-------------------------------1
C(s)+CO2(g)=2CO (g) --- --- --- --- --- --- --- --- --- -2
ZnO (s)+C (s)=Zn (g)+2CO (g) --- --- --- --- --- --- -3
ZnO (s)+CO (g)=Zn (g)+CO2(g)-------------------4
Zn(s)+1/2O2(g)=ZnO (s) --- --- --- --- --- --- --- --- -5
ZnFe2O4(s)+2C (s)=Zn (g)+2Fe (s)+2CO2(g)--------6
3ZnFe2O4(s)+2C (s)=3Zn (g)+2Fe3O4(s)+2CO2(g)---7
3Fe2O3(s)+CO (g)=2Fe3O4(s)+CO2(g)---------------8
Fe3O4(s)+CO (g)=3FeO (s)+CO2(g)-----------------9
FeO (s)+CO (g)=FeO (s)+CO2(g)-------------------10
Gaseous lead and zinc volatilization, and by reoxidizing and cool down outside rotary kiln, generate the thick lead oxide of solid-state and thick
Zinc oxide powder is simultaneously being collected, and is not had the tail gas collected completely during being somebody's turn to do, is externally discharged after charcoal absorption, it will not
Pollute environment.
Step 4: the molten mass stayed in collection step two in rotary kiln, and magnetic has been obtained by quickly cooling, crushing and magnetic separation
Property material and nonmagnetic material, the material that is magnetic collected as iron material, and nonmagnetic material is collected as cement raw material, so that complete
Whole into resource recycles.
The molten mass collected from rotary kiln includes three kinds of clinker, the material that is magnetic, nonmagnetic material materials, its chemistry
Composition analysis result is as shown in the table：
| Composition (wt%) | Fe | Zn | CaO | SiO2 | Al2O3 |
| Clinker | 50.44 | 0.14 | 7.91 | 3.26 | 4.32 |
| Be magnetic material | 62.25 | 0.12 | 1.88 | 0.89 | 1.53 |
| Namagnetic substance | 8.23 | 0.24 | 38.63 | 13.91 | 17.26 |
Material i.e. source of iron that what the present invention obtained be magnetic can be used as iron material to carry out being used as water in melting, nonmagnetic material
Mud raw material, complete the abundant recovery of resource.
Step 5: the thick lead oxide powder collected in step 3, tutty powder are again placed in rotary kiln, control
1200-1300 DEG C of kiln temperature is sintered, and under hot environment, is entrained in thick lead oxide, the various impurity inside tutty
Major part evaporates, and lead zinc can also volatilize, then obtains the smart lead oxide powder of high-purity, smart zinc oxide through peroxidating and cooling
Powder is simultaneously collected, and residual exhaust processing is externally discharged after charcoal absorption.
The constituent analysis of thick oxygen zinc and smart zinc oxide is as shown in the table：
| Composition | Zn | Pb | Cl | K | Na | Fe |
| Tutty (wt%) | 60-63 | 4-6 | 15-20 | 4-6 | 3-5 | 1-2 |
| Smart zinc oxide (wt%) | 76-78 | Less than 0.01 | Less than 0.01 | Less than 0.1 | Less than 0.01 | 1-2 |
Step 6: the smart lead oxide powder in step 5, smart Zinc oxide powder are added in hydrochloric acid solution, solution is controlled
PH value 2-3,50-70 DEG C of solution temperature, lead oxide and zinc oxide and hydrochloric acid reaction generation lead chloride and zinc chloride, lead chloride are molten
Xie Du is very low, forms precipitation in the solution, zinc is then deposited in the solution with Zinc ion form, so as to separate lead and zinc.
ZnO (s)+2HCl=ZnCl2(l)+H2O--------------------11
PbO (s)+2HCl=PbCl2(l)+H2O--------------------12
Zinc oxide and lead oxide become zinc chloride and lead chloride, and lead chloride solubility is very low, form precipitation in the solution,
Zinc is with zinc ion Zn2+Form is deposited in the solution, and so the two is just separated.
Step 7: powdered sodium carbonate is added to the water to form sodium carbonate liquor by a certain percentage, then by step 6
Lead chloride is added in the solution, controls solution ph 8-10,60-80 DEG C of temperature, reaction obtains ceruse precipitation, directly in step
Powdered sodium carbonate is added in liquor zinci chloridi in rapid six, reaction obtains zinc carbonate precipitation.
PbCl2(s)+Na2CO3=PbCO3(s)+NaCl----------------13
ZnCl2(s)+Na2CO3=ZnCO3(s)+NaCl----------------14
The product salt NaCl inside final solution is reacted, industrial salt raw material can be used as.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, the present invention not only conform in
Dust of Iron And Steel Works waste material, while it is applied to the industrial wastes such as Electroplate Factory, machinery plant, minerals processing plant, the ordinary skill of this area
Personnel are under the enlightenment of the present invention, on the premise of without prejudice to present inventive concept and claim, as can making multiple types
Represent, such conversion is each fallen within protection scope of the present invention.
Claims (3)
- A kind of 1. comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making, it is characterised in that：Comprise the following steps：Step 1: the leaded zinc powder dirt of electric furnace is incorporated into a certain proportion of reducing agent, binding agent and water, manufactured after full and uniform mixing Into pelletizing；Step 2: the pelletizing in step 1 is placed in rotary kiln, the 1150-1250 DEG C of progress reduction roasting of control kiln temperature, Lead in leaded zinc powder dirt and zinc are reduced into simple substance, and discharge rotary kiln in the form of a vapor, the valuable metal such as iron and its Its composition then forms molten mass by reduction roasting and stayed in rotary kiln；Step 3: the lead to volatilize in a gaseous form discharged in collection step two from rotary kiln, zinc and other gases and dust, And by aoxidizing and cooling obtains thick lead oxide powder, tutty powder and collected, arranged outside residual exhaust；Step 4: the molten mass stayed in collection step two in rotary kiln, and the thing that is magnetic is obtained by quickly cooling, crushing and magnetic separation Matter and nonmagnetic material, the material that is magnetic are collected as iron material, and nonmagnetic material is collected as cement raw material；Step 5: the thick lead oxide powder collected in step 3, tutty powder are again placed in rotary kiln, control in kiln 1200-1300 DEG C of temperature is sintered, and under hot environment, is entrained in thick lead oxide, the big portion of various impurity inside tutty Divide and evaporate, lead zinc can also volatilize, then obtain the smart lead oxide powder of high-purity, smart Zinc oxide powder through peroxidating and cooling And collect, arranged outside residual exhaust；Step 6: the smart lead oxide powder in step 5, smart Zinc oxide powder are added in hydrochloric acid solution, the pH of solution is controlled Value 2-3,50-70 DEG C of solution temperature, lead oxide and zinc oxide and hydrochloric acid reaction generation lead chloride and zinc chloride, lead chloride solubility It is very low, precipitation is formed in the solution, and zinc is then deposited in the solution with Zinc ion form, so as to separate lead and zinc；Step 7: powdered sodium carbonate is added to the water to form sodium carbonate liquor by a certain percentage, then by the chlorination in step 6 Lead is added in the solution, controls solution ph 8-10,60-80 DEG C of temperature, reaction obtains ceruse precipitation, directly in step 6 In liquor zinci chloridi in add powdered sodium carbonate, reaction obtains zinc carbonate precipitation.
- 2. the comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making according to claim 1, it is characterised in that：Step Reducing agent in one is coke and lime stone.
- 3. the comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making according to claim 1, it is characterised in that：Step Three and step 5 China and foreign countries row residual exhaust also emptied again after charcoal absorption.
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Cited By (14)
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| CN109554550A (en) * | 2018-11-26 | 2019-04-02 | 贵州大学 | A kind of method of steel-making dust comprehensive utilization recycling zinc |
| CN109913643A (en) * | 2019-03-07 | 2019-06-21 | 昆明理工大学 | A method of Pb-Zn deposits are handled with damaged tire |
| CN110029232A (en) * | 2019-04-30 | 2019-07-19 | 云南驰宏锌锗股份有限公司 | A kind of method of low-grade lead Zinc oxide resource utilization |
| 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 |
| CN110453081A (en) * | 2019-04-23 | 2019-11-15 | 湖北金洋冶金股份有限公司 | A kind of leaded flue dust pretreatment unit and method |
| CN110938744A (en) * | 2019-11-25 | 2020-03-31 | 重庆科技学院 | Lead-zinc chloride separation method in steelmaking dust resource recovery process |
| CN111455187A (en) * | 2020-03-10 | 2020-07-28 | 上海宝叶冶金技术有限公司 | Method for recycling fly ash |
| CN111676377A (en) * | 2020-06-04 | 2020-09-18 | 北京科技大学 | Method for recycling zinc powder in zinc-containing dust through cyclic enrichment of flash furnace |
| CN111733330A (en) * | 2020-05-19 | 2020-10-02 | 北京科技大学 | Method for enriching and recovering zinc by using rotary kiln |
| CN111876590A (en) * | 2020-08-10 | 2020-11-03 | 山东电亮亮信息科技有限公司 | Clean recycling method for waste lead mud |
| CN112279294A (en) * | 2020-10-29 | 2021-01-29 | 福建冠鑫新材料有限公司 | Production method of zinc oxide |
| CN113073198A (en) * | 2021-03-26 | 2021-07-06 | 江苏竣业过程机械设备有限公司 | Method for efficiently treating zinc-containing dust and mud |
| CN113637852A (en) * | 2021-08-12 | 2021-11-12 | 张逸璁 | Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant |
| CN114457236A (en) * | 2021-12-16 | 2022-05-10 | 中南大学 | Separation and purification device for metal waste residues and separation and purification method for cobalt oxide residues |
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Application publication date: 20171212 Assignee: Chongqing hundred size pole Technology Co., Ltd. Assignor: Chongqing University of Science & Technology|Yin Zaihong Contract record no.: 2018990000354 Denomination of invention: Comprehensive recycling method of electric steel making lead and zinc-contained dust License type: Exclusive License Record date: 20181226 |
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