CN106676272A - Method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke - Google Patents
Method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke Download PDFInfo
- Publication number
- CN106676272A CN106676272A CN201610928366.4A CN201610928366A CN106676272A CN 106676272 A CN106676272 A CN 106676272A CN 201610928366 A CN201610928366 A CN 201610928366A CN 106676272 A CN106676272 A CN 106676272A
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- Prior art keywords
- fluorine
- volatilization
- zinc oxide
- working chamber
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Classifications
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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
-
- 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
-
- 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
- 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
-
- 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 belongs to the technical field of metallurgy, and particularly relates to a method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke. The method for efficiently removing the fluorine-chlorine impurities in the zinc oxide smoke comprises the following steps of (1) oxidization smelting, (2) reductive volatilization, and (3) furnace slag discharging. According to the method for efficiently removing the fluorine-chlorine impurities in the zinc oxide smoke, after acid-leached slag is subjected to oxidization smelting, the impurities such as fluorine, chlorine and sulfur in the zinc oxide smoke can be removed in the smelting stage, fluorine and chlorine in the zinc oxide smoke can be effectively removed, the treatment cost of the zinc oxide smoke is reduced, energy is saved, the purposes of environmental friendliness and comprehensive utilization of resources are achieved, and melting of the acid-leached slag is accelerated in the smelting stage; volatilization of valuable metal such as zinc is reduced while the impurities such as fluorine and chlorine are effectively removed; and the interior of a volatilization chamber is in a reducing atmosphere, a large amount of CO is generated, high reducibility is kept, the volatilization efficiency for lead and zinc is improved easily, and the recovery rate of the valuable metal is increased.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to the side of fluorine chlora matter in a kind of efficient removal zinc oxide fumes
Method.
Background technology
The method of the de- fluorine and chlorine removal of zinc oxide fumes mainly has：High-temperature roasting takes off fluorine and chlorine removal (multiple hearth furnace, rotary kiln), alkali wash
Fluorine and chlorine removal, solution of zinc sulfate defluorinate chlorine etc..High-temperature roasting removal method fluorine removal efficiency is up to more than 90%, dechlorination rate up to 80% with
On, removal effect is preferable, but equipment investment is big, and Fuel Consumption is larger, and processing cost is higher；Alkali wash defluorinate rate is reachable
90%, equipment and simple to operate, but zinc loss amount is larger, and water resources consumption is larger, and waste water is difficult to process；Solution of zinc sulfate takes off
Division can cause a certain amount of metal loss, and defluorination effect is not good.
Therefore, it is necessary to the method for studying fluorine chlora matter in a kind of efficient removal zinc oxide fumes, effectively removing oxidation
Fluorine and chlorine in Zn dust, reduces zinc oxide fumes processing cost, and energy saving reaches environmental friendliness, comprehensive utilization of resources
Purpose.
The content of the invention
Not enough present in background technology in order to overcome, the present invention provides fluorine chlora in a kind of efficient removal zinc oxide fumes
The method of matter, can effectively remove the fluorine and chlorine in zinc oxide fumes, reduce zinc oxide fumes processing cost, energy saving,
Reach environmental friendliness, the purpose of comprehensive utilization of resources.
The present invention is achieved through the following technical solutions：
The method of fluorine chlora matter is comprised the following steps in described efficient removal zinc oxide fumes：
1) oxidizing semlting
During reducing slag to be added first the working chamber of melting-volatilization combination furnace, fine coal, oxygen-enriched air and air are blasted；Again
Acid leaching residue is added in melting room, working chamber's blow rate required, blast, coal amount is adjusted, working chamber's air coefficient is controlled, it is ensured that be in stove
Oxidizing atmosphere, the complete combustion heat release of fine coal, acid leaching residue is completely melt；Acid leaching residue completes melting, melting in melting room
After fluorine, chlora matter in journey in raw material is recovered, otherwise processed；
2) reduction volatilization
Acid leaching residue completes the process of oxidizing semlting in melting room, after the fluorine, chlora prime element in raw material is deviate from；Slag
Enter room of volatilizing；By adjusting the volatilization room blast orifice blow rate required, blast, coal amount, air coefficient is controlled, pulverized coal friring produces CO,
Ensure to be in reducing atmosphere in stove；The metals such as lead, zinc are reduced volatilization, into flue gas；Lead, zinc valuable metal in volatilization flue gas
The air oxidation for being blasted, is collected after gathering dust flue into volatilization；
3) slag emission
After melt pool height is up to 1~1.5m, stop the charging of working chamber's acid leaching residue；After operation of volatilizing reaches terminal, opening is put
Cinder notch enters deslagging operation, when slag emission is finished, into next duty cycle.
Further, in step 1) working chamber's air coefficient is controlled in oxidizing semlting for 1.2-1.5.
Further, in step 1) furnace temperature is 1100~1300 DEG C in melting room in oxidizing semlting.
Further, in step 2) air coefficient of the room that controls in reduction volatilization to volatilize is 0.5-0.9.
Further, in step 2) indoor temperature of volatilizing in reduction volatilization is 1100~1300 DEG C.
Beneficial effects of the present invention：
1) acid leaching residue, can be from the fluorine in smelt stage removing zinc oxide fumes, chlorine and sulfur etc. after oxidizing semlting
Impurity, can effectively remove the fluorine and chlorine in zinc oxide fumes, reduce zinc oxide fumes processing cost, and energy saving reaches
Environmental friendliness, the purpose of comprehensive utilization of resources.
2) fusing of acid leaching residue is accelerated in smelt stage；Zinc etc. is reduced while the impurity such as fluorine, chlorine are effectively deviate from valuable
The volatilization of metal；It is in reducing atmosphere that volatilization is indoor, produces substantial amounts of CO, keeps stronger reproducibility, is conducive to improving lead, zinc
Volatilization efficiency, improve valuable metal recovery.
3) working chamber's air coefficient is 1.2-1.5, and furnace temperature is 1100~1300 DEG C, enables to working chamber's fine coal and fires completely
Heat release is burnt, heat utilization efficiency is improved, is conducive to improving working chamber's bed ability；Can be in oxidizing atmosphere can ensure in stove, containing zinc
Material is not reduced, and reduces the volatilization of zinc metal, reduces working chamber's dust rate.
4) volatilize room air coefficient 0.5-0.9, and temperature is 1100~1300 DEG C, ensure that fine coal fractional combustion, is produced
A large amount of CO, are in reducing atmosphere in stove；The metals such as lead, zinc are reduced volatilization, improve lead, the volatility of zinc.
Description of the drawings
Fig. 1 is the structural representation of the melting-volatilization combination furnace of the present invention.
In figure, 1-working chamber, 2-volatilization room, 3-embedded wall partition, 4-melting gather dust flue, 5-volatilization gather dust flue,
6-cooling jacket, 7-linker, 8-blast orifice, 9-tertiary air orifice, 10-slag add entrance, 11-cold burden add entrance,
12-slag tap.
Specific embodiment
Below in conjunction with embodiments of the invention and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole, is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1
The method of fluorine chlora matter is comprised the following steps in a kind of efficient removal zinc oxide fumes：
(1) open slag and add entrance 10, (Pb1~6%, Zn5~12%) add in working chamber 1, closes by 40t reducing slags
Slag adds entrance 10；
(2) melting-volatilization combination furnace blast orifice 8 and tertiary air orifice 9 are opened, blast orifice 8 blasts fine coal and oxygen-enriched air, three
Secondary air port 9 blasts air, adjusts the air quantity 8000m that the blast orifice 8 of working chamber 1 is blasted3/ h, blast 180KPa, oxygen-rich concentration 23%,
Coal amount is 1.3t/h；Adjust the air quantity 10000m that the volatilization blast orifice 8 of room 2 is blasted3/ h, blast 180KPa, oxygen-rich concentration 23%,
Coal amount is 2.0t/h；
(3) by acid leaching residue, (leaded 3~8%, zinc 8~18%, sulfur-bearing 6~12%) is added by the speed of 15t/h from cold burden
Mouth 11 is added；
(4) the air quantity 10000m of 1 blast orifice of working chamber 8 is adjusted3/ h, blast 200KPa, oxygen-rich concentration 25%.Coal amount is
1.5t/h, controls the air coefficient of working chamber 1 for 1.2-1.5, it is ensured that be in oxidizing atmosphere in stove, the complete combustion heat release of fine coal will
Acid leaching residue is completely melt that furnace temperature is 1100~1300 DEG C in working chamber 1；
(5) the volatilization air blast air quantity 12000m of 2 blast orifice of room 8 is adjusted3/ h, blast 200KPa, oxygen-rich concentration 25%.Coal amount
For 3.0t/h, air coefficient is controlled for 0.5-0.9, fine coal fractional combustion, a large amount of CO of generation, it is ensured that it is in reproducibility to play in room 2
Atmosphere, temperature is 1100~1300 DEG C in volatilization room 2；
(6) after melt pool height is up to 1~1.5m, the charging of the acid leaching residue of working chamber 1 is stopped.Continue to blow, observe tertiary air orifice
9, judge the volatilization blowing end point of room 2, after operation of volatilizing reaches terminal, slag tap 12 is opened, carry out slagging (leaded ＜ 1%, zinc ＜
4%), slagging is finished, and slag tap 12 is blocked, into next duty cycle.
Embodiment 2
The method of fluorine chlora matter is comprised the following steps in a kind of efficient removal zinc oxide fumes：
(1) open slag and add entrance 10, (Pb2~5%, Zn6~14%) add working chamber 1, closes molten by 30t reducing slags
Slag adds entrance 10；
(2) melting-volatilization combination furnace blast orifice 8 and tertiary air orifice 9 are opened, blast orifice 8 blasts fine coal and oxygen-enriched air, three
Secondary air port 9 blasts air, adjusts the air quantity 10000m that the blast orifice 8 of working chamber 1 is blasted3/ h, blast 160KPa, oxygen-rich concentration
21%.Coal amount is 1.5t/h；Adjust the air quantity 12000m that the volatilization blast orifice 8 of room 2 is blasted3/ h, blast 160KPa, oxygen-rich concentration
21%, coal amount is 2.2t/h；
(3) by acid leaching residue, (leaded 3~10%, zinc 4~12%, sulfur-bearing 8~10%) is added by the speed of 18t/h from cold burden
Mouth 11 is added；
(4) the air quantity 12000m of 1 blast orifice of working chamber 8 is adjusted3/ h, blast 180KPa, oxygen-rich concentration 23%.Coal amount is
1.8t/h, controls the air coefficient of working chamber 1 for 1.1-1.3, it is ensured that be in oxidizing atmosphere in stove, the complete combustion heat release of fine coal will
Acid leaching residue is completely melt that furnace temperature is 1150~1350 DEG C in working chamber 1；
(5) the volatilization air blast air quantity 14000m of 2 blast orifice of room 8 is adjusted3/ h, blast 180KPa, oxygen-rich concentration 23%.Coal amount
For 2.8t/h, air coefficient is controlled for 0.6-0.8, fine coal fractional combustion, a large amount of CO of generation, it is ensured that be in reproducibility in volatilization room 2
Atmosphere, temperature is 1100~1300 DEG C in volatilization room 2；
(6) after melt pool height is up to 1~1.5m, the charging of the acid leaching residue of working chamber 1 is stopped.Continue to blow, observe tertiary air orifice
9, judge the volatilization blowing end point of room 2, after operation of volatilizing reaches terminal, slag tap 12 is opened, carry out slagging (leaded ＜ 1.5%, zinc
＜ 4.5%), slagging is finished, and slag tap 12 is blocked, into next duty cycle.
Embodiment 3
The method of fluorine chlora matter is comprised the following steps in a kind of efficient removal zinc oxide fumes：
(1) open slag and add entrance 10, (Pb3~7%, Zn8~14%) add in working chamber 1, closes by 60t reducing slags
Slag adds entrance 10；
(2) melting-volatilization combination furnace blast orifice 8 and tertiary air orifice 9 are opened, blast orifice 9 blasts fine coal and oxygen-enriched air, three
Secondary air port 9 blasts air.Adjust the air quantity 12000m that the blast orifice 8 of working chamber 1 is blasted3/ h, blast 200KPa, oxygen-rich concentration
25%, coal amount is 1.6t/h；Adjust the air quantity 14000m that the volatilization blast orifice 8 of room 2 is blasted3/ h, blast 200KPa, oxygen-rich concentration
25%, coal amount is 2.2t/h；
(3) by acid leaching residue lead (4~8%, zinc 6~18%, sulfur-bearing 4~8%) add entrance 11 from cold burden by the speed of 18t/h
Add；
(4) the air quantity 12000m of 1 blast orifice of working chamber 8 is adjusted3/ h, blast 200KPa, oxygen-rich concentration 25%.Coal amount is
1.6t/h, controls the air coefficient of working chamber 1 for 1.1-1.4, it is ensured that working chamber 1 is in oxidizing atmosphere, the complete combustion heat release of fine coal,
Acid leaching residue is completely melt, furnace temperature is 1200~1300 DEG C in working chamber 1；
(5) the volatilization air blast air quantity 14000m of 2 blast orifice of room 8 is adjusted3/ h, blast 200KPa, oxygen-rich concentration 25%.Coal amount
For 3.5t/h, air coefficient is controlled for 0.5-0.7, fine coal fractional combustion, a large amount of CO of generation, it is ensured that be in reducing atmosphere in stove,
Temperature is 1200~1350 DEG C in volatilization room 2；
(6) after melt pool height is up to 1~1.5m, the charging of the acid leaching residue of working chamber 1 is stopped.Continue to blow, observe tertiary air orifice
9, judge volatilization blowing end point, after operation of volatilizing reaches terminal, slag tap 12 is opened, carry out slagging (leaded ＜ 3%, zinc ＜
5%), slagging is finished, and slag tap 12 is blocked, into next duty cycle.
Experimental analysiss：
Working chamber's flue dust in embodiment 1-3 and volatilization room flue dust composition are analyzed, analysis result is as shown in table 1：
The working chamber's flue dust of table 1 and volatilization room flue dust component analyses table
Acid leaching residue of the present invention after oxidizing semlting, can from smelt stage remove zinc oxide fumes in fluorine, chlorine and
The impurity such as sulfur, can effectively remove the fluorine and chlorine in zinc oxide fumes, reduce zinc oxide fumes processing cost, energy saving,
Reach environmental friendliness, the purpose of comprehensive utilization of resources；Accelerate the fusing of acid leaching residue in smelt stage；The impurity such as fluorine, chlorine is effective
The volatilization of the valuable metals such as zinc is reduced while abjection；It is in reducing atmosphere that volatilization is indoor, produces substantial amounts of CO, is kept stronger
Reproducibility, is conducive to improving lead, the volatilization efficiency of zinc, improves the recovery of valuable metal；Working chamber's air coefficient is 1.2-1.5,
Furnace temperature is 1100~1300 DEG C, enables to the complete combustion heat release of working chamber's fine coal, improves heat utilization efficiency, is conducive to improving melting
Room bed ability；Can be reduced with ensureing that in oxidizing atmosphere in stove, material containing zinc is not reduced, and reduces the volatilization of zinc metal
Working chamber's dust rate；Volatilization room air coefficient 0.5-0.9, temperature is 1100~1300 DEG C, ensure that fine coal fractional combustion, is produced
The a large amount of CO of life, are in reducing atmosphere in stove；The metals such as lead, zinc are reduced volatilization, improve lead, the volatility of zinc.
Finally illustrate, preferred embodiment above is only unrestricted to illustrate technical scheme, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
In form and in details various changes are made to it, without departing from claims of the present invention limited range.
Claims (5)
1. in a kind of efficient removal zinc oxide fumes fluorine chlora matter method, it is characterised in that：Described efficient removal Zinc Oxide
The method of fluorine chlora matter is comprised the following steps in flue dust：
1）Oxidizing semlting
During reducing slag to be added first the working chamber of melting-volatilization combination furnace, fine coal, oxygen-enriched air and air are blasted；Melting again
Indoor addition acid leaching residue, adjusts working chamber's blow rate required, blast, coal amount, controls working chamber's air coefficient, it is ensured that in oxidation in stove
Property atmosphere, the complete combustion heat release of fine coal is completely melt acid leaching residue；Acid leaching residue completes melting in melting room, in fusion process
After fluorine, chlora matter in raw material is recovered, otherwise processed；
2）Reduction volatilization
Acid leaching residue completes the process of oxidizing semlting in melting room, after the fluorine, chlora prime element in raw material is deviate from；Slag enters to wave
Send out room；By adjusting the volatilization room blast orifice blow rate required, blast, coal amount, air coefficient is controlled, pulverized coal friring produces CO, it is ensured that
It is in reducing atmosphere in stove；The metals such as lead, zinc are reduced volatilization, into flue gas；Lead, zinc valuable metal in volatilization flue gas is roused
The air oxidation for entering, is collected after gathering dust flue into volatilization；
3）Slag emission
After melt pool height is up to 1~1.5m, stop the charging of working chamber's acid leaching residue；After operation of volatilizing reaches terminal, slag tap is opened
Into deslagging operation, when slag emission is finished, into next duty cycle.
2. in a kind of efficient removal zinc oxide fumes according to claim 1 fluorine chlora matter method, it is characterised in that：
Step 1）Working chamber's air coefficient is controlled in oxidizing semlting for 1.2-1.5.
3. in a kind of efficient removal zinc oxide fumes according to claim 1 fluorine chlora matter method, it is characterised in that：
Step 1）Furnace temperature is 1100~1300 DEG C in melting room in oxidizing semlting.
4. in a kind of efficient removal zinc oxide fumes according to claim 1 fluorine chlora matter method, it is characterised in that：
Step 2）Control to volatilize room air coefficient in reduction volatilization for 0.5-0.9.
5. in a kind of efficient removal zinc oxide fumes according to claim 1 fluorine chlora matter method, it is characterised in that：
Step 2）Indoor temperature of volatilizing in reduction volatilization is 1100~1300 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928366.4A CN106676272A (en) | 2016-10-31 | 2016-10-31 | Method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610928366.4A CN106676272A (en) | 2016-10-31 | 2016-10-31 | Method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke |
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| CN201610928366.4A Pending CN106676272A (en) | 2016-10-31 | 2016-10-31 | Method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108866320A (en) * | 2018-07-16 | 2018-11-23 | 赫章县金川锌业有限公司 | A kind of method of the production of chlorination process integration heavy zinc oxide and fire concentrate impurity |
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| CN103388081A (en) * | 2013-07-23 | 2013-11-13 | 中南大学 | Bath smelting method and apparatus of zinc sulfide concentrate and lead-zinc containing materials |
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| RU2071983C1 (en) * | 1993-05-18 | 1997-01-20 | Михаил Георгиевич Васильев | Zinc concentrate reprocessing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108866320A (en) * | 2018-07-16 | 2018-11-23 | 赫章县金川锌业有限公司 | A kind of method of the production of chlorination process integration heavy zinc oxide and fire concentrate impurity |
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Application publication date: 20170517 |