CN110093499A - A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide - Google Patents
A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide Download PDFInfo
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- CN110093499A CN110093499A CN201910431667.XA CN201910431667A CN110093499A CN 110093499 A CN110093499 A CN 110093499A CN 201910431667 A CN201910431667 A CN 201910431667A CN 110093499 A CN110093499 A CN 110093499A
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- Prior art keywords
- kiln
- blast furnace
- zinc oxide
- oxygen
- furnace 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
- C22B1/02—Roasting processes
-
- 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
-
- 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
- C22B7/02—Working-up flue dust
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, comprising the following steps: ingredient: by blast furnace dust, sedimentation powder, back powder, 5:4:1 is uniformly mixed and obtains mixture in proportion；Controlling water content in mixture is 12~18% mass ratioes；Mixture is prepared into disc type granulation device the particle of 6~12mm again, finally dries, makes water tariff collection 8~12%；The solid waste composition granule of wetting is sent into rotary kiln and is roasted, controls 1300~1600 DEG C of temperature of kiln head, 600~800 DEG C of kiln end temperature；Inventory and kiln volumetric ratio are 0.3: 1~0.6: 1；It is passed through the compressed air that oxygen concentration is 33~47% into rotary kiln from kiln hood and kiln tail respectively and roasts 2~3h；After roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
Description
Technical field
The present invention relates to chemical metallurgy technical fields, and in particular to a kind of oxygen-rich treated blast furnace dust production secondary zinc oxide
Method.
Background technique
In blast furnace production process, a large amount of blast furnace dust-gas plaster is usually supervened.Due to containing in blast furnace dust
There is the zinc of recoverable, therefore, how effectively to comprehensively utilize blast furnace dust, recycle valuable element, is production for a long time
Enterprise makes great efforts the project of tackling key problem.One of them technology is to be sent into rotary kiln, after mixing blast furnace dust with coke powder through high temperature cigarette
After changing process, this product of Second-rate zinc oxide powder is obtained, the zinc in blast furnace dust is made effectively to be recycled and be utilized.But it is existing
This technology but there is following deficiency: one, since the grade of blast furnace dust is thinner, in the roasting process in rotary kiln, because
Material gas permeability is very poor, causes coke powder fuel in roasting process, and because of incomplete combustion, and the reduction for being difficult to provide 1100 DEG C is anti-
Environment temperature is answered, while being difficult to play the effect of reducing agent, the thermal efficiency and reaction efficiency cannot be effectively improved, is in addition improvement kiln
Interior material grain clinkering rolls situation, need have more breeze to check melt polymerization and absorb meltable FeS, energy consumption is caused to occupy height not
Under.Two, due to material component complexity, especially contain SiO2And have the presence of lead, and it will form low melting point eutectic, it will after fusing
Interfere the rolling of material；Simultaneously because of the iron containing volume and with the presence of sulphur, iron sulfide FeS will form, and FeS is meltable, makes to expect that grain is molten
It ties and increases and roll difficulty, in addition grain size of raw material is thinner, it is easy to be attached on the material grain of semi-molten state, cause in preheating zone
Between reaction zone, reaction zone and cooling zone (i.e. temperature range junction), cyclic annular ramming material band is formed, it is serious to hinder normal production
Operation, and it is uncontrollable, therefore, knot kiln is serious, kiln phase reduced service life.
Summary of the invention
The object of the present invention is to provide a kind of good permeability, furnace charge does not tie kiln, the thermal efficiency using high, reaction efficiency it is good with
Blast furnace flue dust-gas plaster is raw material, with the method for rotary kiln production oxide powder and zinc.
The technical scheme is that a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, including following step
It is rapid:
(1) ingredient: by blast furnace dust, sedimentation powder, back powder in proportion 5:4:1 be uniformly mixed obtain mixture；
(2) controlling water content in mixture is 12~18% mass ratioes；
(3) mixture is prepared into disc type granulation device the particle of 6~12mm again, finally dries, makes water tariff collection 8
~12%；
(4) the solid waste composition granule of wetting is sent into rotary kiln and is roasted, control temperature of kiln head 1300~1600
DEG C, 600~800 DEG C of kiln end temperature；Inventory and kiln volumetric ratio are 0.3: 1~0.6: 1；
(5) respectively from kiln hood and kiln tail be passed through into rotary kiln oxygen concentration be 33~47% compressed air roasting 2~
3h；
(6) after roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
Preferably, in the step (1), the sedimentation powder is the powder recycled from the deduster on conventional stove production line
Dirt.
Preferably, in the step (1), the back powder is recycled from the surface-cooler on conventional stove production line
Dust.
Preferably, in the step (5), the pressure of compressed air is 0.15~0.25MPa.
Preferably, in the step (5), compressed air is protruded by stainless steel oxygen lance away from 3~5m of kiln hood or kiln tail
Position, sprayed into kiln.
The present invention not only makes blast furnace dust-gas plaster become regenerated resources, Zn-ef ficiency is solved in ironmaking processes, because following
Ring is enriched with and adversely affects caused by blast furnace, while also having properly settled blast furnace dust-gas plaster and having made because of outlet, stockpiling
The problem of at environmental pollution, manufactured pellet feed significantly improve the material permeability in rotary kiln, keep comprehensive energy consumption bright
Aobvious to reduce, kiln condition is stably and controllable, and no longer ring formation in kiln effectively extends kiln phase service life, improves production efficiency, reduces life
Produce cost.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the protection model of the claims in the present invention
It encloses.
Embodiment 1
A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, comprising the following steps:
(1) ingredient: by blast furnace dust, sedimentation powder, back powder in proportion 5:4:1 be uniformly mixed obtain mixture；The sedimentation
Powder is the dust recycled from the deduster on conventional stove production line；The back powder is from the surface on conventional stove production line
The dust recycled in cooler；
(2) controlling water content in mixture is 12% mass ratio；
(3) mixture is prepared into disc type granulation device the particle of 6mm again, finally dries, makes water tariff collection 8%；
(4) the solid waste composition granule of wetting is sent into rotary kiln and is roasted, control 1300 DEG C of temperature of kiln head, kiln tail
600 DEG C of temperature；Inventory and kiln volumetric ratio are 0.3: 1；
(5) it is passed through the compressed air that oxygen concentration is 33% into rotary kiln from kiln hood and kiln tail respectively and roasts 2h；Compression
The pressure of air is 0.15MPa；Compressed air is protruded into away from the position at kiln hood or kiln tail 3m, into kiln by stainless steel oxygen lance
It sprays；
(6) after roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
Embodiment 2
A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, comprising the following steps:
(1) ingredient: by blast furnace dust, sedimentation powder, back powder in proportion 5:4:1 be uniformly mixed obtain mixture；The sedimentation
Powder is the dust recycled from the deduster on conventional stove production line；The back powder is from the surface on conventional stove production line
The dust recycled in cooler；
(2) controlling water content in mixture is 15% mass ratio；
(3) mixture is prepared into disc type granulation device the particle of 9mm again, finally dries, makes water tariff collection 10%；
(4) the solid waste composition granule of wetting is sent into rotary kiln and is roasted, control 1450 DEG C of temperature of kiln head, kiln tail
700 DEG C of temperature；Inventory and kiln volumetric ratio are 0.4: 1；
(5) the compressed air roasting 2 that oxygen concentration is 40% is passed through into rotary kiln from kiln hood and kiln tail respectively.5h；Pressure
The pressure of contracting air is 0.20MPa；Compressed air is protruded by stainless steel oxygen lance away from the position at kiln hood or kiln tail 4m, to kiln
Interior ejection；
(6) after roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
Embodiment 3
A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, comprising the following steps:
(1) ingredient: by blast furnace dust, sedimentation powder, back powder in proportion 5:4:1 be uniformly mixed obtain mixture；The sedimentation
Powder is the dust recycled from the deduster on conventional stove production line；The back powder is from the surface on conventional stove production line
The dust recycled in cooler；
(2) controlling water content in mixture is 18% mass ratio；
(3) mixture is prepared into disc type granulation device the particle of 12mm again, finally dries, water tariff collection is made to exist
12%；
(4) the solid waste composition granule of wetting is sent into rotary kiln and is roasted, control 1600 DEG C of temperature of kiln head, kiln tail
800 DEG C of temperature；Inventory and kiln volumetric ratio are 0.6: 1；
(5) it is passed through the compressed air that oxygen concentration is 47% into rotary kiln from kiln hood and kiln tail respectively and roasts 3h；Compression
The pressure of air is 0.25MPa；Compressed air is protruded into away from the position at kiln hood or kiln tail 5m, into kiln by stainless steel oxygen lance
It sprays；
(6) after roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
Above-described embodiment not only makes blast furnace dust-gas plaster become regenerated resources, solves Zn-ef ficiency in ironmaking processes,
It is adversely affected caused by blast furnace due to circulation collection, while also having properly settled blast furnace dust-gas plaster because of outlet, stockpiling
And the problem of causing environmental pollution, manufactured pellet feed significantly improve the material permeability in rotary kiln, make comprehensive energy
Consumption is substantially reduced, and kiln condition is stably and controllable, and no longer ring formation in kiln effectively extends kiln phase service life, improves production efficiency, is dropped
Low production cost.
Claims (5)
1. a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide, which comprises the following steps:
(1) ingredient: by blast furnace dust, sedimentation powder, back powder in proportion 5:4:1 be uniformly mixed obtain mixture；
(2) controlling water content in mixture is 12~18% mass ratioes；
(3) mixture is prepared into disc type granulation device the particle of 6~12mm again, is finally dried, make water tariff collection 8~
12%；
(4) the solid waste composition granule of wetting is sent into rotary kiln and is roasted, control 1300~1600 DEG C of temperature of kiln head, kiln
600~800 DEG C of tail temperature；Inventory and kiln volumetric ratio are 0.3: 1~0.6: 1；
(5) it is passed through the compressed air that oxygen concentration is 33~47% into rotary kiln from kiln hood and kiln tail respectively and roasts 2~3h；
(6) after roasting, kiln tail gas blow pipe is closed, and collect secondary zinc oxide.
2. a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide according to claim 1, which is characterized in that institute
It states in step (1), the sedimentation powder is the dust recycled from the deduster on conventional stove production line.
3. a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide according to claim 1, which is characterized in that institute
It states in step (1), the back powder is the dust recycled from the surface-cooler on conventional stove production line.
4. a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide according to claim 1, which is characterized in that institute
It states in step (5), the pressure of compressed air is 0.15~0.25MPa.
5. a kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide according to claim 1, which is characterized in that institute
It states in step (5), compressed air is protruded by stainless steel oxygen lance away from the position at 3~5m of kiln hood or kiln tail, is sprayed into kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431667.XA CN110093499A (en) | 2019-05-23 | 2019-05-23 | A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431667.XA CN110093499A (en) | 2019-05-23 | 2019-05-23 | A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide |
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| Publication Number | Publication Date |
|---|---|
| CN110093499A true CN110093499A (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910431667.XA Pending CN110093499A (en) | 2019-05-23 | 2019-05-23 | A kind of method of oxygen-rich treated blast furnace dust production secondary zinc oxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733330A (en) * | 2020-05-19 | 2020-10-02 | 北京科技大学 | Method for zinc enrichment and recovery by using rotary kiln |
| CN111893295A (en) * | 2020-08-12 | 2020-11-06 | 鑫联环保科技股份有限公司 | Enrichment recovery method for zinc-containing secondary resource volatilization kiln |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
-
2019
- 2019-05-23 CN CN201910431667.XA patent/CN110093499A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733330A (en) * | 2020-05-19 | 2020-10-02 | 北京科技大学 | Method for zinc enrichment and recovery by using rotary kiln |
| CN111893295A (en) * | 2020-08-12 | 2020-11-06 | 鑫联环保科技股份有限公司 | Enrichment recovery method for zinc-containing secondary resource volatilization kiln |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190806 |
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| WD01 | Invention patent application deemed withdrawn after publication |