CN106702169A - Method and system for treating zinc-containing dust - Google Patents
Method and system for treating zinc-containing dust Download PDFInfo
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- CN106702169A CN106702169A CN201611070179.3A CN201611070179A CN106702169A CN 106702169 A CN106702169 A CN 106702169A CN 201611070179 A CN201611070179 A CN 201611070179A CN 106702169 A CN106702169 A CN 106702169A
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- 239000011701 zinc Substances 0.000 title claims abstract description 72
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 69
- 239000000428 dust Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005453 pelletization Methods 0.000 claims abstract description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000007885 magnetic separation Methods 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims description 56
- 239000013078 crystal Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 22
- 238000007781 pre-processing Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical group O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 2
- 239000003610 charcoal Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 abstract description 22
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 6
- 239000002893 slag Substances 0.000 abstract description 6
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 abstract 3
- 239000007767 bonding agent Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 238000001238 wet grinding Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 6
- 239000000571 coke Substances 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000019580 granularity Nutrition 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 239000011133 lead Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000012054 meals Nutrition 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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
Landscapes
- 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
The invention discloses a method and system for treating zinc-containing dust. The system comprises a raw material treating system, an annular roasting furnace, a zinc recycling system and a slag separation system. The invention further discloses a method for using the system for treating the zinc-containing dust. The method includes the steps that firstly, the zinc-containing dust, a reducing agent and a bonding agent are mixed and subjected to wet grinding and pelletizing, and pellets are dried; and secondly, the dried pellets are distributed onto a furnace hearth through a feeding port of the annular roasting furnace and finally are discharged out from a discharging port of a cooling furnace cavity, the dried pellets enter the slag separation system to be subjected to ore grinding treatment and magnetic separation treatment in sequence to obtain metal iron powder and magnetic separation tailings, generated high-temperature smoke finally enters a zinc recycling system, and volatilized valuable metal dust is collected and obtained. According to the method and system for treating the zinc-containing dust, the zinc-containing dust of a steel plant is effectively utilized, comprehensive recycling of iron, carbon, zinc and other elements is achieved, the process flow is short, little fuel is consumed, and environment pollution is effectively reduced.
Description
Technical field
The present invention relates to a kind of system for processing zinc-containing dust, the invention further relates to application, the system processes zincilate
The method of dirt, belongs to the field of comprehensive utilization of zinc-containing dust.
Background technology
With the fast development of steel and iron industry, zinc-containing dust is very huge per annual emissions.At present, such dust is due to length
Phase cannot effectively be processed, and pile up like a mountain near many steel mills, and substantial amounts of soil is not occupied, also pollute environment, right
The person causes harm, and the wherein valuable resource such as iron, zinc, lead, carbon is wasted again.
Rich in materials such as iron, carbon, zinc, lead in steel plant's zinc-containing dust, comprehensive utilization value is higher.If recycle,
Then iron, carbon can save part coal and iron ore deposit, and lead zinc can be used to make battery, conductive material, it is also possible to various to do
Kirsite.Therefore, steel plant's Zn-Pb-containing dusts how efficiently to be utilized and its comprehensive added value is improved, environmental pollution is reduced, is turned into
The key subjects that smelter faces.At present domestic many iron and steel enterprises will contain zinc, lead powder dirt directly allocated into as raw material sintering,
Pelletizing feed, the method is the simplest, can to a certain extent realize the recycling of iron resource, with less investment, instant effect, nothing
The advantages of original technique need to being changed, but there are problems that dispensing, mixing, and the circulation and enrichment of harmful element can be caused,
Harm is brought to blast furnace, belongs to the extensive utilization of ion dust mud contaning, it is impossible to thoroughly solve ion dust mud contaning high-efficiency resource recycling
Problem, seriously constrains the sustainable development of steel plant.
Chinese Patent Application No. is that 201310599292.0 patent of invention discloses a kind of magnetization of steel plant's zinc-containing dust
Method of roasting and its device and application, it is including getting the raw materials ready, calcination stepses, specifically includes sieving approach and inserts in calcination vessel, roasts
Baking vessel is put into heating furnace, and heating furnace is warming up to 800~1000 DEG C, less than 200 DEG C are cooled to after 3~5h of temperature control come out of the stove and cool down
To magnetizing roast iron ore concentrate.Major defect existing for the method is：Iron ore concentrate after magnetizing roast, iron is mainly oxidation state,
Grade is low；Cooling down is needed after magnetizing roast, pelletizing sensible heat is wasted, production equipment used is tunnel kiln, and roasting time is long, energy
Consumption is high, pollution is big.
Chinese Patent Application No. is that 200610069619.3 patent of invention discloses a kind of limonite and steel plant and contains zinc
The method and reduction roaster of dust production Iron concentrate, using limonite and steel plant's zinc-containing dust or speculum iron, bloodstone, sulphur
Acid sludge is raw material, and using sloped rotary type reduction roaster, furnace chamber pressure is 250-350Pa, under reducing atmosphere condition, mineral aggregate
650-900 DEG C is moved to by low-temperature rotary, and cools down magnetization, most afterwards through magnetic separation composition Iron concentrate.The major defect of the method is
Using heating one end, furnace body temperature skewness, material constantly rolls in body of heater, rub easy efflorescence, and powder is susceptible to
Ring formation, the big 250Pa-350Pa of air pressure outside stove internal ratio body of heater, coal gas and air may be blown out outside stove powder, low production efficiency.
In summary visible, in the method or equipment of existing treatment steel plant zinc-containing dust, different degrees of presence is not
The comprehensive reutilization of the elements such as iron, carbon and zinc can be realized, the series such as process flow is long, fuel consumption is high, environmental pollution is serious
Problem, has much room for improvement.
The content of the invention
An object of the present invention is to provide a kind of dedicated system for processing zinc-containing dust；
The second object of the present invention is to provide a kind of method for applying the dedicated system to process zinc-containing dust；
The method and system for the treatment of steel plant zinc-containing dust provided by the present invention can realize iron in steel plant's zinc-containing dust,
The recycling of the valuable elements such as carbon, zinc, improves its comprehensive added value, reduces environmental pollution.
The purpose of the present invention is achieved through the following technical solutions：
A kind of system for processing zinc-containing dust, including：Feedstock pre-processing system, annular roaster, zinc recovering system and
Scum piece-rate system；Wherein, the discharging opening of feedstock pre-processing system is connected with the charging aperture of annular roaster；Zinc recovering system
Import is connected with the flue outlet of annular roaster, and scum separates the charging aperture of piece-rate system and the discharging opening phase of annular roaster
Even.
Wherein, described feedstock pre-processing system realizes dispensing, mixing, shaping and the drying of all materials, to obtain
Meet the dry bulb group into stove requirement, including be sequentially connected mixed material equipment, profit mill equipment, make pelletizing equipment and pelletizing is dried
Equipment；
The annular roaster includes housing, siege and drive device；The housing forms annular furnace chamber, and siege can turn
Move and positioned at the bottom of annular furnace chamber, drive device is connected with siege；Wherein, annular furnace chamber is divided into by the barricade of multiple radial directions
The low-temperature reduction furnace chamber that is sequentially connected of head and the tail, crystal grain are grown up furnace chamber and cooling furnace chamber；Feeding mouth is provided with furnace chamber is dried, in cooling
Furnace chamber is provided with discharging opening；
The barricade extends downwards from the roof and side wall of housing and keeps being spaced with siege, it is preferred that between described
Every being 10-20cm；Barricade is set to reduce the disturbance of the air-flow of adjacent area, and then reduces temperature and the atmosphere product to each region
Raw influence；Meanwhile, region is angularly divided, rationally to control pelletizing in the regional residence time, obtain good
Reduction and slag sluicing system effect.
Wherein, multiple radiant tubes are provided with low-temperature reduction furnace chamber；Crystal grain grows up furnace chamber equipped with flame heating device；Cold
But the roof of furnace chamber is provided with water cooling plant；Corresponding to outside low-temperature reduction furnace chamber furnace wall middle part set flue, flue it is another
End is connected with the entrance of described zinc recovering system.Flue is arranged on low-temperature reduction furnace chamber, the heat that flue gas is taken away is reduced as far as possible
Amount.When flue-gas temperature is down to below 200 DEG C, the valuable metal dust such as lead, zinc volatilized using bag-type dust, collection.
As a kind of preferred structure of the invention, the feeding mouth of low-temperature reduction furnace chamber and the discharging opening of cooling furnace chamber according to
The mode of minimum spacing is configured；The angle that the low-temperature reduction furnace chamber of the body of heater accounts for annular furnace chamber is 200 ° -270 °, crystal grain
The angle that furnace chamber of growing up accounts for annular furnace chamber is 45 ° -90 °, and the angle that cooling furnace chamber accounts for annular furnace chamber is 20 ° -45 °.
The zinc recovering system realizes that the flue gas that annular roaster is discharged is exchanged heat and lowered the temperature, and low-temperature flue gas are used
Bag-type dust removal system is reclaimed to ZnO dust；Preferably, described zinc recovering system is preferably bag-type dust collector.
Described scum piece-rate system includes grinding attachment and magnetic plant.
Invention further provides the method that the dedicated system described in a kind of application processes zinc-containing dust, including：
(1) zinc-containing dust, reducing agent and binding agent mixed successively in feedstock pre-processing system, moistened mill, pelletizing
The pelletizing dried with drying and processing；
(2) charging aperture that the pelletizing dried passes through annular roaster is wired on siege, opens drive device, drive siege
On pelletizing sequentially pass through low-temperature reduction furnace chamber, crystal grain grow up furnace chamber and cooling furnace chamber, finally by cooling furnace chamber discharging opening
Discharge；
(3) ore grinding treatment and magnetic separation treatment are carried out successively into scum piece-rate system after the pelletizing cooling of discharge, obtain gold
Category iron powder and magnetic separation tailings；The high-temperature flue gas produced in low-temperature reduction furnace chamber eventually enter into zinc recovering system from the outlet of flue
System, the valuable metal dust that collection is volatilized.
Wherein, in step (1) by zinc-containing dust, reducing agent and binding agent according to 100:12~25:1~5 mass ratio
Mixed in feedstock pre-processing system；
Profit mill described in step (1) is that material of the granularity less than 0.074mm in the mixed material after mill is processed is moistened in control
More than 80% is accounted for, the contact area of material can be increased, moreover it is possible to accelerate reduction rate.
When zinc-containing dust, reducing agent and binding agent are carried out pelletizing by step (1) in feedstock pre-processing system, pelletizing is controlled
Diameter between 10~14mm, pelletizing is conducted heat good, reach good drying and reduction effect；Pelletizing is dried
When, the moisture content of control pelletizing accounts for the 8-12% of pelletizing gross mass.
Low-temperature reduction furnace chamber uses radiant tube mode of heating, and temperature is 900 DEG C~1100 DEG C, to reduce entering for air as far as possible
Enter, be reduced with making pelletizing degree big to the greatest extent, it is to avoid pelletizing oxidative phenomena occur.Crystal grain grows up furnace chamber using flame mode of heating,
Lifting temperature makes by the pelletizing metallization further lifting of low-temperature reduction, while being in pelletizing to 1250 DEG C~1400 DEG C
Soft heat state, the mobility of gangue content, promotes the iron crystal grain agglomeration of reduction in lifting pelletizing, is conducive to follow-up iron and arteries and veins
The separation of stone composition.Cooling furnace chamber furnace roof uses water-cooling pattern, and pelletizing temperature is reduced into 900 DEG C~1150 DEG C, improves pelletizing
The intensity of itself, in order to discharge.
Described reducing agent is preferably semi-coke；Described binding agent is preferably bentonite or starch solution.
Main beneficial effect of the invention
(1) low-temperature reduction roasting is grown up with high temperature crystal grain and is completed in same equipment, and process flow is short；
(2) make full use of the grow up waste heat of area's flue gas of crystal grain to be dried pelletizing, reduce the consumption of fuel；
(3) pelletizing low-temperature bake area uses radiant tube mode of heating, and atmosphere is good, and reduction effect is good, reduces secondary oxidation；
(4) efficiently using steel plant's zinc-containing dust, synthetical recovery and the utilization of the elements such as iron, carbon and zinc are realized, reduces ring
Pollute in border.
Brief description of the drawings
The dedicated system schematic diagram of Fig. 1 treatment zinc powder dirt of the invention；
The structural representation of Fig. 2 present invention annular roasters；
Description of reference numerals：1- low-temperature reduction furnace chambers, 2- crystal grain is grown up furnace chamber, 3- cooling furnace chambers, 4- charging apertures, 5- dischargings
Mouthful, 6- barricades, 7- flame heating devices, 8- radiant tubes, 9- flues.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.It should be understood that the embodiment is only exemplary, any limitation is not constituted to the scope of the present invention.This area
Technical staff should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and
Form is modified or is replaced, but these modifications or replacement each fall within protection scope of the present invention.
Specific embodiment one
With reference to Fig. 1-Fig. 2, the system for the treatment of zinc-containing dust provided by the present invention, including：Feedstock pre-processing system S100,
Annular roaster S200, zinc recovering system S300 and scum piece-rate system S400；Wherein, feedstock pre-processing system S100 goes out
Material mouth is connected with the charging aperture 4 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture that scum separates piece-rate system S400 is connected with the discharging opening 5 of annular roaster S200；Described raw material is located in advance
Reason system S100 includes the mixed material equipment being sequentially connected, profit mill equipment, makes pelletizing equipment and pelletizing drying equipment；Described
Zinc recovering system S300 is bag-type dust collector；Described scum piece-rate system S400 includes grinding attachment and magnetic plant.
The annular roaster S200 includes housing, siege and drive device；The housing forms annular furnace chamber, siege
Rotatably and positioned at the bottom of annular furnace chamber, drive device is connected with siege；Wherein, annular furnace chamber by multiple radial directions barricade 6
It is divided into the low-temperature reduction furnace chamber 1, crystal grain that is sequentially connected of head and the tail to grow up furnace chamber 2 and cooling furnace chamber 3；Set in low-temperature reduction furnace chamber 1
There is feeding mouth 4, discharging opening 4 is provided with cooling furnace chamber 3；The barricade 6 extends downwards and and stove from the roof and side wall of housing
Bed keeps interval, and described interval is 15cm.
Multiple radiant tubes 8 are provided with low-temperature reduction furnace chamber 2；Crystal grain grows up furnace chamber 2 equipped with flame heating device 7；Cold
But the roof of furnace chamber 3 is provided with water cooling plant；Corresponding to the furnace wall middle part outside low-temperature reduction furnace chamber 2, flue 9, branch flue 9 are set
Outlet be connected with the entrance of described zinc recovering system S300.
The feeding mouth 4 of the low-temperature reduction furnace chamber 1 and the discharging opening 5 of cooling furnace chamber 3 are carried out according to the mode of minimum spacing
Set；It is 225 ° that low-temperature reduction furnace chamber 1 accounts for the angle of annular furnace chamber, and crystal grain is grown up, and to account for the angle of annular furnace chamber be 60 ° to furnace chamber 2,
The angle that cooling furnace chamber 3 accounts for annular furnace chamber is 30 °.
Specific embodiment two
With reference to Fig. 1-Fig. 2, the system for the treatment of zinc-containing dust provided by the present invention, including：Feedstock pre-processing system S100,
Annular roaster S200, zinc recovering system S300 and scum piece-rate system S400；Wherein, feedstock pre-processing system S100 goes out
Material mouth is connected with the charging aperture 4 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture that scum separates piece-rate system S400 is connected with the discharging opening 5 of annular roaster S200；Described raw material is located in advance
Reason system S100 includes the mixed material equipment being sequentially connected, profit mill equipment, makes pelletizing equipment and pelletizing drying equipment；Described
Zinc recovering system S300 is bag-type dust collector；Described scum piece-rate system S400 includes grinding attachment and magnetic plant.
The annular roaster S200 includes housing, siege and drive device；The housing forms annular furnace chamber, siege
Rotatably and positioned at the bottom of annular furnace chamber, drive device is connected with siege；Wherein, annular furnace chamber by multiple radial directions barricade 6
It is divided into the low-temperature reduction furnace chamber 1, crystal grain that is sequentially connected of head and the tail to grow up furnace chamber 2 and cooling furnace chamber 3；Set in low-temperature reduction furnace chamber 1
There is feeding mouth 4, discharging opening 5 is provided with cooling furnace chamber 3；The barricade 6 extends downwards and and stove from the roof and side wall of housing
Bed keeps interval, and described interval is 10cm；
Multiple radiant tubes 8 are provided with low-temperature reduction furnace chamber 1；Crystal grain grows up furnace chamber 2 equipped with flame heating device 7；Cold
But the roof of furnace chamber 3 is provided with water cooling plant；Corresponding to the furnace wall middle part outside low-temperature reduction furnace chamber 1, flue 9 is set, flue 9
The other end is connected with the entrance of described zinc recovering system S300.
The feeding mouth 4 of the low-temperature reduction furnace chamber 1 and the discharging opening 5 of cooling furnace chamber 3 are carried out according to the mode of minimum spacing
Set；It is 210 ° that low-temperature reduction furnace chamber 2 accounts for the angle of annular furnace chamber, and crystal grain is grown up, and to account for the angle of annular furnace chamber be 70 ° to furnace chamber 3,
The angle that cooling furnace chamber 4 accounts for annular furnace chamber is 30 °.
Specific embodiment three
With reference to Fig. 1-Fig. 2, the system for the treatment of zinc-containing dust provided by the present invention, including：Feedstock pre-processing system S100,
Annular roaster S200, zinc recovering system S300 and scum piece-rate system S400；Wherein, feedstock pre-processing system S100 goes out
Material mouth is connected with the charging aperture 4 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture that scum separates piece-rate system S400 is connected with the discharging opening 5 of annular roaster S200；Described raw material is located in advance
Reason system (S100) includes the mixed material equipment being sequentially connected, profit mill equipment, makes pelletizing equipment and pelletizing drying equipment；It is described
Zinc recovering system S300 be bag-type dust collector；Described scum piece-rate system S400 includes grinding attachment and magnetic plant.
The annular roaster S200 includes housing, siege and drive device；The housing forms annular furnace chamber, siege
Rotatably and positioned at the bottom of annular furnace chamber, drive device is connected with siege；Wherein, annular furnace chamber by multiple radial directions barricade 6
It is divided into the low-temperature reduction furnace chamber 1, crystal grain that is sequentially connected of head and the tail to grow up furnace chamber 2 and cooling furnace chamber 3；Set in low-temperature reduction furnace chamber 1
There is feeding mouth 4, discharging opening 5 is provided with cooling furnace chamber 3；The barricade 6 extends downwards and and stove from the roof and side wall of housing
Bed keeps interval, and described interval is 20cm.
Multiple radiant tubes 8 are provided with low-temperature reduction furnace chamber 1；Crystal grain grows up furnace chamber 2 equipped with flame heating device 7；Cold
But the roof of furnace chamber 3 is provided with water cooling plant；Corresponding to the furnace wall middle part outside low-temperature reduction furnace chamber 1, flue 9 is set, flue 9
The other end is connected with the entrance of described zinc recovering system S300；
The feeding mouth 4 of the low-temperature reduction furnace chamber 1 and the discharging opening 5 of cooling furnace chamber 3 are carried out according to the mode of minimum spacing
Set；It is 235 ° that low-temperature reduction furnace chamber 2 accounts for the angle of annular furnace chamber, and crystal grain is grown up, and to account for the angle of annular furnace chamber be 60 ° to furnace chamber 3,
The angle that cooling furnace chamber 4 accounts for annular furnace chamber is 20 °.
The method of the present invention and system are described in detail below in conjunction with specific embodiment
Embodiment 1
By 100 parts of certain steel plant's zinc-containing dust, 12 parts of semi-coke, 3 parts of bentonite carry out dispensing, and the material after preparing is moistened
Mill treatment, it is levigate after raw meal particle size account for 86.60% less than the material of 0.074mm granularities, pelletizing is carried out after the water for plus 11%,
10~14mm of pelletizing particle diameter.The pelletizing made removes moisture to after 0.6%, being distributed into annular roaster S200 through drying, pelletizing from
Annular roaster S200 feeding mouths 4 enter, sequentially pass through low-temperature reduction furnace chamber 1, crystal grain grow up furnace chamber 2 and cooling furnace chamber 3.Low temperature
1060 DEG C of 1 temperature of reduction furnace chamber, 240 ° of radian；Crystal grain is grown up 1320 DEG C of 2 temperature control of furnace chamber, and radian is 60 °；Cooling furnace chamber 3
1000 DEG C of temperature control, 45 ° of radian, the time that rotates a circle, the ash-laden gas to the discharge of flue 9 carried out bag-type dust for 90min
Treatment, collection can obtain the ZnO dust that Zn grades are 62.5wt%.After pelletizing ore grinding after reduction, through 1200Oe low intensity magnetic separations, will
Iron is separated with slag, and it is the metal iron powder of 90.47wt% to obtain TFe.
Embodiment 2
By 100 parts of certain steel plant's zinc-containing dust, 18 parts of semi-coke, 5 parts of starch solution carry out dispensing, and the material after preparing is carried out
Profit mill treatment, it is levigate after raw meal particle size account for 86.60% less than the material of 0.074mm granularities, made after the water for plus 9%
Ball, 10~14mm of pelletizing particle diameter.After the pelletizing made is through dry removing moisture to 0.5%, annular roaster S200, pelletizing are distributed into
Enter from annular roaster S200 feeding mouths 4, sequentially pass through low-temperature reduction furnace chamber 1, crystal grain grow up furnace chamber 2 and cooling furnace chamber 3；It is low
1100 DEG C of 1 temperature of temperature reduction furnace chamber, 220 ° of radian；Crystal grain is grown up 1300 DEG C of 2 temperature control of furnace chamber, and radian is 90 °；Cooling furnace chamber
3 1000 DEG C of temperature controls, 30 ° of radian, the time that rotates a circle, the ash-laden gas to the discharge of flue 9 carried out bag-type dust for 90min
Treatment, collection can obtain the ZnO dust that Zn grades are 67.4wt%.After pelletizing ore grinding after reduction, through 1000Oe low intensity magnetic separations, will
Iron is separated with slag, and it is the metal iron powder of 92.57wt% to obtain TFe.
Embodiment 3
By 100 parts of certain steel plant's zinc-containing dust, 23 parts of semi-coke, 4 parts of bentonite carry out dispensing, and the material after preparing is moistened
Mill treatment, it is levigate after raw meal particle size account for 84.72% less than the material of 0.074mm granularities, pelletizing is carried out after the water for plus 12%,
10~14mm of pelletizing particle diameter.After the pelletizing made is through dry removing moisture to 0.5%, annular roaster S200 is distributed into.Pelletizing from
Annular roaster S200 feeding mouths 4 enter, sequentially pass through low-temperature reduction furnace chamber 1, crystal grain grow up furnace chamber 2 and cooling furnace chamber 3；Low temperature
1100 DEG C of 1 temperature of reduction furnace chamber, 240 ° of radian；Crystal grain is grown up 1330 DEG C of 2 temperature control of furnace chamber, and radian is 60 °；Cooling furnace chamber 3
1000 DEG C of temperature control, 45 ° of radian, the time that rotates a circle, the ash-laden gas to the discharge of flue 9 carried out bag-type dust for 75min
Treatment, collection can obtain the ZnO dust that Zn grades are 71.2wt%.After pelletizing ore grinding after reduction, through 1000Oe low intensity magnetic separations, will
Iron is separated with slag, and it is the metal iron powder of 93.14wt% to obtain TFe.
Claims (10)
1. it is a kind of process zinc-containing dust system, it is characterised in that including：Feedstock pre-processing system (S100), annular roaster
(S200), zinc recovering system (S300) and scum piece-rate system (S400)；Wherein, the discharging of feedstock pre-processing system (S100)
Mouth is connected with the charging aperture (5) of annular roaster；The charging aperture of zinc recovering system (S300) and the cigarette of annular roaster (S200)
Road outlet is connected, and the charging aperture that scum separates piece-rate system (S400) is connected with the discharging opening (6) of annular roaster (S200).
2. according to the system described in claim 1, it is characterised in that：Described feedstock pre-processing system (S100) includes connecting successively
The mixed material equipment that connects, profit mill equipment, make pelletizing equipment and pelletizing drying equipment；Described zinc recovering system (S300) is cloth
Bag dust arrester；Described scum piece-rate system (S400) includes grinding attachment and magnetic plant.
3. according to the system described in claim 1, it is characterised in that：The annular roaster (S200) include housing, siege with
And drive device；The housing forms annular furnace chamber, and siege is rotatable and positioned at the bottom of annular furnace chamber, drive device and siege
It is connected；Wherein, annular furnace chamber is divided into low-temperature reduction furnace chamber (1), crystal grain that head and the tail are sequentially connected by the barricade (6) of multiple radial directions
Grow up furnace chamber (2) and cooling furnace chamber (3)；Feeding mouth (4) is provided with low-temperature reduction furnace chamber (1), discharging is provided with cooling furnace chamber (3)
Mouth (5).
4. according to the system described in claim 3, it is characterised in that：The barricade (6) from the roof and side wall of housing downwards
Extend and keep being spaced with siege；Preferably, described interval is 10-20cm；
Multiple radiant tubes (8) are respectively equipped with low-temperature reduction furnace chamber (1)；Crystal grain grows up furnace chamber (2) equipped with flame heating device
(7)；Water cooling plant is provided with the roof of cooling furnace chamber (3)；Corresponding to low-temperature reduction furnace chamber (1) outside furnace wall middle part, cigarette is set
Road (9), the other end of flue (9) is connected with the entrance of described zinc recovering system (S300).
5. system according to claim 3, it is characterised in that：The feeding mouth (4) and cooling furnace chamber of low-temperature reduction furnace chamber (1)
(3) discharging opening (5) is configured according to the mode of minimum spacing；The low-temperature reduction furnace chamber (1) accounts for the angle of annular furnace chamber
It it is 200 ° -270 °, crystal grain furnace chamber (2) of growing up accounts for the angle of annular furnace chamber for 45 ° -90 °, and cooling furnace chamber (3) accounts for annular furnace chamber
Angle is 30 ° -45 °.
6. the method that the system described in a kind of application claim 1-5 any one processes zinc-containing dust, it is characterised in that bag
Include：
(1) zinc-containing dust, reducing agent and binding agent mixed successively in feedstock pre-processing system (S100), moisten mill, make
The pelletizing that ball and drying and processing are dried；
(2) pelletizing that will be dried passes through charging aperture (4) cloth of annular roaster (S200) to siege, opens drive device, drives
Pelletizing on dynamic siege sequentially passes through low-temperature reduction furnace chamber (1), crystal grain grows up and furnace chamber (2) and cools down furnace chamber (3), finally by cold
But discharging opening (5) discharge of furnace chamber (3)；
(3) ore grinding treatment and magnetic separation treatment are carried out successively into scum piece-rate system (S400) after the pelletizing cooling of discharge, obtain
Metal iron powder and magnetic separation tailings；The high-temperature flue gas produced in low-temperature reduction furnace chamber (1) eventually enter into zinc recovering into flue (9)
System (S300), the valuable metal dust that collection is volatilized.
7. in accordance with the method for claim 1, it is characterised in that：Step presses zinc-containing dust, reducing agent and binding agent in (1)
According to 100:12~25:1~5 mass ratio is mixed in feedstock pre-processing system (S100)；Described reducing agent is blue
Charcoal；Described binding agent is bentonite or starch solution.
8. in accordance with the method for claim 6, it is characterised in that：Profit mill described in step (1) is after control profit mill is processed
Mixed material in granularity account for more than 80% less than the material of 0.074mm；Step (1) is by zinc-containing dust, reducing agent and bonding
When agent carries out pelletizing in feedstock pre-processing system (S100), the diameter of control pelletizing is between 10~14mm；Pelletizing is carried out
During drying, the moisture content of control pelletizing accounts for the 8-12% of pelletizing gross mass.
9. in accordance with the method for claim 6, it is characterised in that：The temperature control of low-temperature reduction furnace chamber (1) be 900 DEG C~
1100℃；Crystal grain grow up furnace chamber (2) temperature control be 1250 DEG C~1400 DEG C；The temperature control of cooling furnace chamber (3) is 900 DEG C
~1150 DEG C.
10. in accordance with the method for claim 9, it is characterised in that：Low-temperature reduction furnace chamber (1) is heated by radiant tube (8)
The temperature control of the furnace chamber is 900 DEG C~1100 DEG C by mode；Crystal grain grows up furnace chamber (2) should using flame heating device (7)
The temperature control of furnace chamber is 1250 DEG C~1400 DEG C；Cooling furnace chamber (3) is using being arranged on the water cooling plant of roof by the furnace chamber
Temperature control is 900 DEG C~1150 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611070179.3A CN106702169A (en) | 2016-11-28 | 2016-11-28 | Method and system for treating zinc-containing dust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611070179.3A CN106702169A (en) | 2016-11-28 | 2016-11-28 | Method and system for treating zinc-containing dust |
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| Publication Number | Publication Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400782A (en) * | 2017-07-28 | 2017-11-28 | 重庆科技学院 | Its recovery method as resource of the waste material containing zinc-iron caused by Production Process for Steel Enterprise |
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2016
- 2016-11-28 CN CN201611070179.3A patent/CN106702169A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400782A (en) * | 2017-07-28 | 2017-11-28 | 重庆科技学院 | Its recovery method as resource of the waste material containing zinc-iron caused by Production Process for Steel Enterprise |
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