CN106399700A - Method and system for treating zinc-bearing dust - Google Patents
Method and system for treating zinc-bearing dust Download PDFInfo
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- CN106399700A CN106399700A CN201610973841.XA CN201610973841A CN106399700A CN 106399700 A CN106399700 A CN 106399700A CN 201610973841 A CN201610973841 A CN 201610973841A CN 106399700 A CN106399700 A CN 106399700A
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 81
- 239000011701 zinc Substances 0.000 title claims abstract description 81
- 239000000428 dust Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005453 pelletization Methods 0.000 claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003546 flue gas Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000007885 magnetic separation Methods 0.000 claims abstract description 7
- 239000008188 pellet Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 34
- 238000007599 discharging Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 17
- 238000007781 pre-processing Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000000571 coke Substances 0.000 claims description 7
- 239000002912 waste gas Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 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
- 239000003245 coal Substances 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000002006 petroleum coke Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 18
- 239000010959 steel Substances 0.000 abstract description 18
- 229910052742 iron Inorganic materials 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 2
- 239000007767 bonding agent Substances 0.000 abstract 1
- 238000001238 wet grinding Methods 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 17
- 230000009467 reduction Effects 0.000 description 11
- 239000011787 zinc oxide Substances 0.000 description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 4
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229940095674 pellet product Drugs 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 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
- 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
- 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
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical compound [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 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
- 238000000465 moulding Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000005096 rolling 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
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000010792 warming Methods 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
- C22B19/20—Obtaining zinc otherwise than by distilling
-
- 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
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 system for treating zinc-bearing dust and a method for treating zinc-bearing dust through the system. The system comprises a raw material pretreatment system, an annular roasting furnace, a zinc recovery system and an iron slag separation system. The invention further discloses the method for treating zinc-bearing dust through the system. The method comprises the steps that the zinc-bearing dust, a reducing agent and a bonding agent are mixed and are subjected to wet-grinding and pelletizing, and pellets are dried; (2) the dried pellets are distributed on a furnace hearth through a feed port of the annular roasting furnace and finally discharged through a discharge port of a cooling furnace chamber; and (3) the dried pellets are conveyed into the iron slag separation system to be subjected to ore grinding treatment and magnetic separation treatment in sequence to obtain metallic iron powder and magnetic separation tailings, and generated high-temperature flue gas goes into the zinc recovery system finally to collect volatilized valuable metal dust. According to the method and system, zinc-bearing dust of steel works is efficiently utilized, comprehensive recycling and utilization of elements such as iron, carbon and zinc are realized, the process flow is short, fuel consumption is little, and environmental pollution is effectively reduced.
Description
Technical field
The present invention relates to a kind of system processing zinc-containing dust, the invention further relates to this system is applied to process 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, the every annual emissions of zinc-containing dust are very huge.At present, such dust is due to length
Phase cannot get effective process, and near many steel mills, pile up like a mountain, does not occupy substantial amounts of soil, also pollutes environment, right
The person causes harm, wastes the wherein valuable resource such as ferrum, zinc, lead, carbon again.
It is rich in the material such as ferrum, carbon, zinc, lead, comprehensive utilization value is higher in steel plant's zinc-containing dust.If recycling,
Then ferrum, 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, how efficient utilization steel plant Zn-Pb-containing dusts improve its comprehensive added value, reduce environmental pollution, become
The key subjects that smelter faces.Domestic at present a lot of iron and steel enterprises will contain zinc, Hydrocerussitum (Ceruse) dirt as raw material directly allocate into sintering,
Pelletizing feed, the method is the simplest, can achieve the recycling of iron resource to a certain extent, has a less investment, instant effect, no
The advantages of original technique need to be changed, but have such problems as that dispensing, mixing are difficult, and circulation and the enrichment of harmful element can be caused,
Bring harm to blast furnace, the extensive style belonging to ion dust mud contaning is using 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 zinc-containing dusts
Method of roasting and its device and application, it includes getting the raw materials ready, calcination stepses, specifically includes sieving approach and inserts in calcination vessel, roasting
Baking vessel puts into heating furnace, and heating furnace is warming up to 800～1000 DEG C, is cooled to less than 200 DEG C and comes out of the stove cool down after temperature control 3～5h
To magnetizing roast iron ore concentrate.Major defect existing for the method is：Iron ore concentrate after magnetizing roast, ferrum is mainly oxidation state,
Grade is low；Need cooling down after magnetizing roast, waste pelletizing sensible heat, production equipment used is tunnel kiln, 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
Dust produces method and the reduction roaster of Iron concentrate, using limonite and steel plant's zinc-containing dust or speculum iron, bloodstone, sulfur
Acid sludge is raw material, and using sloped rotary type reduction roaster, furnace chamber pressure is 250-350Pa, under reducing atmosphere condition, mineral aggregate
Move to 650-900 DEG C by low-temperature rotary, and cool down magnetization, after through magnetic separation composition Iron concentrate.The major defect of the method is
Using heating one end, furnace body temperature skewness, material constantly rolling, easy efflorescence of friction in body of heater, powder is susceptible to
Powder may be blown out outside stove by ring formation, the big 250Pa-350Pa of air pressure outside stove internal ratio body of heater, coal gas and air, low production efficiency.
Comprehensive visible above, in the existing method processing steel plant's zinc-containing dust or equipment, different degrees of presence is not
Enable the comprehensive reutilization of the elements such as ferrum, carbon and zinc, the series such as process flow length, fuel consumption are high, environmental pollution is serious
Problem, has much room for improvement.
Content of the invention
An object of the present invention is to provide a kind of dedicated system processing zinc-containing dust；
The second object of the present invention is to provide a kind of application method that described dedicated system processes zinc-containing dust；
The method and system processing steel plant zinc-containing dusts provided by the present invention can achieve ferrum 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 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, the discharging opening phase of the charging aperture of scum separation piece-rate system and annular roaster
Even.
Wherein, described feedstock pre-processing system realizes dispensing, mixing, molding and the drying of all materials, to obtain
Meet the dry bulb group into stove requirement, including the mixed material equipment being sequentially connected, profit mill equipment, make pelletizing equipment and pelletizing drying
Equipment；
Described annular roaster includes housing, siege and driving means；Described housing forms annular furnace chamber, and siege can turn
Bottom that is dynamic and being located at annular furnace chamber, driving means are connected with siege；Wherein, annular furnace chamber is divided into by the barricade of multiple radial directions
Drying furnace chamber, prereduction furnace chamber, end reducing furnace chamber and cooling furnace chamber that head and the tail are sequentially connected；It is provided with feeding mouth drying furnace chamber,
It is provided with discharging opening in cooling furnace chamber；
Described barricade from the roof of housing and side wall extend downwards and and siege keep interval it is preferred that between described
Every being 10-20cm；Setting barricade is to reduce the disturbance of the air-flow of adjacent area, and then reduces the temperature to each region and atmosphere product
Raw impact；Meanwhile, region is angularly divided, control pelletizing in the regional time of staying with reasonable, obtain good
Slag sluicing system effect.
Wherein, it is provided with multiple radial canals in pre-reducing furnace intracavity；End reducing furnace chamber is equipped with flame heating device；In cooling stove
The roof in chamber is provided with water cooling plant；Corresponding to setting flue, the other end of flue and institute in the middle part of the furnace wall outside prereduction furnace chamber
The entrance of the zinc recovering system stated connects.Flue is arranged on prereduction furnace chamber, reduces the heat that flue gas is taken away as far as possible, treat flue gas
When temperature is down to less than 200 DEG C, using bag-type dust, collect the valuable metal dust such as the lead volatilizing, zinc.Described zinc recovering system
System is arranged on the prereduction district of annular roaster, realizes the collection containing ZnO dust, and the metallic zinc restoring is volatized into flue,
In flue, temperature reduces, and metallic zinc reoxidation becomes ZnO powder to be collected by sack cleaner, the treated heel row up to standard of flue gas
Go out.
The high-temp waste gas in end reducing furnace chamber are transmitted by the heat-exchange device being arranged between end reducing furnace chamber and drying furnace chamber
To baking zone, the thermal source dried as green-ball, temperature control is adjusted by participating in cold blast rate.
As a kind of preferred structure of the present invention, dry the feeding mouth of furnace chamber and the discharging opening of cooling furnace chamber according to minimum
The mode of spacing is configured；The angle that described drying furnace chamber accounts for annular furnace chamber is 45 ° -90 °, and prereduction furnace chamber accounts for annular furnace chamber
Angle be 150 ° -210 °, the angle that end reducing furnace chamber accounts for annular furnace chamber is 45 ° -90 °, and cooling furnace chamber accounts for the angle of annular furnace chamber
Spend for 30 ° -45 °.
Described scum piece-rate system includes grinding attachment and magnetic plant.
Invention further provides the method that a kind of described dedicated system of application processes zinc-containing dust, including：
(1) zinc-containing dust, reducing agent and binding agent carried out in feedstock pre-processing system successively mixing, moisten mill, pelletizing
Obtain the pelletizing of drying with drying and processing；
(2) charging aperture that the pelletizing dried is passed through annular roaster is wired on siege, opens driving means, drives siege
On pelletizing sequentially pass through drying furnace chamber, prereduction furnace chamber, end reducing furnace chamber and cooling furnace chamber, finally by cooling the going out of furnace chamber
Material mouth is discharged；
(3) enter scum piece-rate system after the pelletizing cooling discharged and carry out ore grinding process and magnetic separation process successively, obtain gold
Belong to iron powder and magnetic separation tailings；The high-temperature flue gas producing in prereduction furnace chamber eventually enter into zinc recovering system from the outlet of flue,
Collect the valuable metal dust obtaining volatilizing.
By zinc-containing dust, reducing agent and binding agent according to 100 in step (1):16～24:1～5 mass ratio is in raw material
Mixed in pretreatment system (S100)；Described reducing agent is selected from one of metallurgical coke, semi-coke, petroleum coke, coal, semicoke
Or several mixture, wherein, the proportioning of reducing agent is：(the carbon mole in fixed carbon molal quantity+zinc-containing dust in reducing agent
Number)/(oxygen molal quantity in lead zinc oxide in oxygen molal quantity+zinc-containing dust in iron oxides in zinc-containing dust) be 1.1-2.1.
Described binding agent is bentonite or starch solution.
Profit mill described in step (1) is to control to moisten the material that granularity in the mixed material after mill is processed is less than 0.074mm
Account for more than 80%；When zinc-containing dust, reducing agent and binding agent are carried out pelletizing in feedstock pre-processing system, control pelletizing
Diameter is preferably between 6～12mm；Moisture content in described green pellets accounts for the 6-10% of pelletizing gross mass.
Described prereduction district temperature is 900-1100 DEG C, adopt radial canal mode of heating to enter reducing air as far as possible and
Carbon scaling loss, promote pelletizing in the big to the greatest extent degree of metal-oxide reduction, it is to avoid restore metal simple-substance oxidation.Steel plant contain
Below 705 DEG C, the C direct-reduction started temperature of ZnO is about 944 to iron oxides C direct-reduction started temperature in zinc powder dirt
～947 DEG C, therefore, the reduction of iron oxides and zinc oxide substantially can be in the humidity province of 900～1100 DEG C of prereduction district
Interior complete.Described prereduction district setting flue and dust collecting system, the metallic iron restoring is stayed in pelletizing, reduction
The metallic zinc going out is volatized into flue gas, and condensation in flue is oxidized to ZnO secondary dust and is collected by dust collecting system；Eventually also
1200～1300 DEG C of former area temperature, angle is 45～90 °, using flame mode of heating, lifts temperature to 1200 DEG C～1350 DEG C,
Pelletizing carries out the end reduction of iron oxides in this region, and pelletizing degree of metallization improves further, and the metallic iron crystal grain of generation is long
Big formation crystal stock, is conducive to the separation of follow-up ferrum and gangue content；Cooling zone is 30～45 ° to the angle between discharging opening, cooling
Area's furnace roof adopts water-cooling pattern, and pelletizing temperature is reduced to 900 DEG C～1150 DEG C, improves the intensity of pelletizing itself, in order to go out
Material.
The main beneficial effect of the present invention：
(1) pelletizing is dried, preheating, reduction complete in same system, and the duration of heat is short, production efficiency is high, equipment cost
Low；
(2) different conversion zones are arranged according to the temperature difference that differential responses need, improve heat utilization ratio；
(3) dry wet bulb group using the hot waste gas of whole reducing zone, realize UTILIZATION OF VESIDUAL HEAT IN, reducing energy consumption；
(4) efficient utilization steel plant zinc-containing dust improve its comprehensive added value, reduces environmental pollution.
Brief description
The dedicated system schematic diagram of the process zinc powder dirt of Fig. 1 present invention；
The structural representation of Fig. 2 present invention annular roaster；
Description of reference numerals：1- dries furnace chamber, 2- prereduction furnace chamber, 3- end reducing furnace furnace chamber, and 4- cools down furnace chamber, and 5- feeds
Mouthful, 6- discharging opening, 7- barricade, 8- flame heating device, 9- heat-exchange device, 10- radial canal.
Specific embodiment
To further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
Apparent.It should be understood that described embodiment is only exemplary, any restriction is not constituted to the scope of the present invention.This area
Technical staff should be understood that lower without departing from the spirit and scope of the present 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.
Concrete real number mode one
Reference Fig. 1-Fig. 2, the system of process 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, the going out of feedstock pre-processing system S100
Material mouth is connected with the charging aperture 5 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture of scum separation piece-rate system S400 is connected with the discharging opening 6 of annular roaster S200；Described raw material is located in advance
Mixed material equipment that reason system S100 includes being sequentially connected, profit mill equipment, make 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.
Described annular roaster S200 includes housing, siege and driving means；Described housing forms annular furnace chamber, siege
Bottom that is rotatable and being located at annular furnace chamber, driving means are connected with siege；Wherein, annular furnace chamber is by the barricade 7 of multiple radial directions
It is divided into drying furnace chamber 1, prereduction furnace chamber 2, end reducing furnace chamber 3 and the cooling furnace chamber 4 that head and the tail are sequentially connected；Furnace chamber 1 is being dried
It is provided with feeding mouth 5, be provided with discharging opening 6 in cooling furnace chamber 4；Described barricade 7 from the roof of housing and side wall extend downwards and with
Siege keeps interval, and described interval is 15cm.
It is provided with multiple radial canals 10 in pre- low-temperature reduction furnace chamber 2；End reducing furnace chamber 3 is equipped with flame heating device 8；Cold
But the roof of furnace chamber 4 is provided with water cooling plant；Corresponding in the middle part of the furnace wall outside prereduction furnace chamber 2 arrange flue, flue another
End is connected with the entrance of described zinc recovering system S300.
The discharging opening 6 of the described dry feeding mouth 5 drying furnace chamber 1 and cooling furnace chamber 4 is set according to the mode of minimum spacing
Put；The angle that drying furnace chamber 1 accounts for annular furnace chamber is 45 °, and the angle that prereduction furnace chamber 2 accounts for annular furnace chamber is 195 °, end reducing furnace
The angle that chamber 3 accounts for annular furnace chamber is 75 °, and the angle that cooling furnace chamber 4 accounts for annular furnace chamber is 45 °.
It is provided with heat-exchange device 9 between end reducing furnace chamber and drying furnace chamber, heat-exchange device 9, by end reducing furnace chamber
High-temp waste gas transmit to baking zone, the thermal source dried as green-ball, temperature control is adjusted by participating in cold blast rate.
Concrete real number mode two
Reference Fig. 1-Fig. 2, the system of process 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, the going out of feedstock pre-processing system S100
Material mouth is connected with the charging aperture 5 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture of scum separation piece-rate system S400 is connected with the discharging opening 6 of annular roaster S200；Described raw material is located in advance
Mixed material equipment that reason system S100 includes being sequentially connected, profit mill equipment, make 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.
Described annular roaster S200 includes housing, siege and driving means；Described housing forms annular furnace chamber, siege
Bottom that is rotatable and being located at annular furnace chamber, driving means are connected with siege；Wherein, annular furnace chamber is by the barricade 7 of multiple radial directions
It is divided into drying furnace chamber 1, prereduction furnace chamber 2, end reducing furnace chamber 3 and the cooling furnace chamber 4 that head and the tail are sequentially connected；Furnace chamber 1 is being dried
It is provided with feeding mouth 5, be provided with discharging opening 6 in cooling furnace chamber 4；Described barricade 7 from the roof of housing and side wall extend downwards and with
Siege keeps interval, and described interval is 10cm.
It is provided with multiple radial canals 10 in pre- low-temperature reduction furnace chamber 2；End reducing furnace chamber 3 is equipped with flame heating device 8；Cold
But the roof of furnace chamber 4 is provided with water cooling plant；Corresponding in the middle part of the furnace wall outside prereduction furnace chamber 2 arrange flue, flue another
End is connected with the entrance of described zinc recovering system S300.
The discharging opening 6 of the described dry feeding mouth 5 drying furnace chamber 1 and cooling furnace chamber 4 is set according to the mode of minimum spacing
Put；The angle that drying furnace chamber 1 accounts for annular furnace chamber is 90 °, and the angle that prereduction furnace chamber 2 accounts for annular furnace chamber is 180 °, end reducing furnace
The angle that chamber 3 accounts for annular furnace chamber is 60 °, and the angle that cooling furnace chamber 4 accounts for annular furnace chamber is 30 °.
It is provided with heat-exchange device 9 between end reducing furnace chamber and drying furnace chamber, heat-exchange device 9, by end reducing furnace chamber
High-temp waste gas transmit to baking zone, the thermal source dried as green-ball, temperature control is adjusted by participating in cold blast rate.
Concrete real number mode three
Reference Fig. 1-Fig. 2, the system of process 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, the going out of feedstock pre-processing system S100
Material mouth is connected with the charging aperture 5 of annular roaster；The import of zinc recovering system S300 and the flue outlet of annular roaster S200
It is connected, the charging aperture of scum separation piece-rate system S400 is connected with the discharging opening 6 of annular roaster S200；Described raw material is located in advance
Mixed material equipment that reason system S100 includes being sequentially connected, profit mill equipment, make 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.
Described annular roaster S200 includes housing, siege and driving means；Described housing forms annular furnace chamber, siege
Bottom that is rotatable and being located at annular furnace chamber, driving means are connected with siege；Wherein, annular furnace chamber is by the barricade 7 of multiple radial directions
It is divided into drying furnace chamber 1, prereduction furnace chamber 2, end reducing furnace chamber 3 and the cooling furnace chamber 4 that head and the tail are sequentially connected；Furnace chamber 1 is being dried
It is provided with feeding mouth 5, be provided with discharging opening 6 in cooling furnace chamber 4；Described barricade 7 from the roof of housing and side wall extend downwards and with
Siege keeps interval, and described interval is 20cm.
It is provided with multiple radial canals 10 in pre- low-temperature reduction furnace chamber 2；End reducing furnace chamber 3 is equipped with flame heating device 8；Cold
But the roof of furnace chamber 4 is provided with water cooling plant；Corresponding in the middle part of the furnace wall outside prereduction furnace chamber 2 arrange flue, flue another
End is connected with the entrance of described zinc recovering system S300.
The discharging opening 6 of the described dry feeding mouth 5 drying furnace chamber 1 and cooling furnace chamber 4 is set according to the mode of minimum spacing
Put；The angle that drying furnace chamber 1 accounts for annular furnace chamber is 75 °, and the angle that prereduction furnace chamber 2 accounts for annular furnace chamber is 165 °, end reducing furnace
The angle that chamber 3 accounts for annular furnace chamber is 75 °, and the angle that cooling furnace chamber 4 accounts for annular furnace chamber is 45 °.
It is provided with heat-exchange device 9 between end reducing furnace chamber and drying furnace chamber, heat-exchange device 9, by end reducing furnace chamber
High-temp waste gas transmit to baking zone, the thermal source dried as green-ball, temperature control is adjusted by participating in cold blast rate.
Below in conjunction with specific embodiment, the method for the present invention and system are described in detail
Embodiment one
By 100 parts of certain steel plant's zinc-containing dust (granularity accounts for 86.7% less than 0.074mm), 18 parts of semi-coke, 3 parts of bentonite mix
Even rear pelletizing (pelletizing particle diameter 8～12mm), pelletizing enters from annular roaster S200 feeding mouth 5, sequentially passes through annular roaster
The drying furnace chamber 1 of S200, prereduction furnace chamber 2 and end reducing furnace chamber 3；Dry 400 DEG C of furnace chamber 1 temperature, 45 ° of radian；Pre-reducing furnace
1000 DEG C of chamber 2 temperature control, radian is 195 °；1250 DEG C of end reducing furnace chamber 3 temperature control, 75 ° of radian；Cooling furnace chamber 4 radian
45°.Furnace bottom rotated a circle the time for 120 minutes, and the ZnO in pelletizing is reduced into metallic zinc in prereduction furnace chamber and enters flue gas,
Pelletizing after dezincification is reduced into metallized pellet product in end reducing furnace chamber and discharges from discharging opening.Metallized pellet ferrous metal
Rate 91%, zinc removal efficiency 97%, Zn grade 71% in dust.
Embodiment two
By 100 parts of certain steel plant's zinc-containing dust (granularity accounts for 82.3% less than 0.074mm), 20 parts of semi-coke, 5 parts of starch solution
Pelletizing (pelletizing particle diameter 12～14mm) after mixing, pelletizing enters from the feeding mouth 5 of annular roaster S200, sequentially passes through annular roasting
Burn drying furnace chamber 1, prereduction furnace chamber 2 and the end reducing furnace chamber 3 of stove S200.Dry 300 DEG C of the temperature of furnace chamber 1,90 ° of radian；In advance
1050 DEG C of the temperature control of reduction furnace chamber 2, radian is 180 °；1270 DEG C of the temperature control in end reducing furnace chamber 3,60 ° of radian；Cooling
30 ° of the radian of furnace chamber 4.Furnace bottom rotated a circle the time for 150 minutes, and the ZnO in pelletizing is reduced into metal in prereduction furnace chamber
Zinc enters flue gas, and the pelletizing after dezincification is reduced into metallized pellet product in end reducing furnace chamber and discharges from discharging opening.Metallization
Pelletizing ferrous metal rate 89%, zinc removal efficiency 94%, Zn grade 66% in dust.
Embodiment three
By 100 parts of certain steel plant's zinc-containing dust (granularity accounts for 76.6% less than 0.074mm), 23 parts of semi-coke, 4 parts of bentonite mix
Even rear pelletizing (pelletizing particle diameter 14-16mm), pelletizing enters from the feeding mouth 5 of annular roaster S200, sequentially passes through annular roasting
The drying furnace chamber 1 of stove S200, prereduction furnace chamber 2 and end reducing furnace chamber 3；Dry 350 DEG C of the temperature of furnace chamber 1,75 ° of radian；In advance also
1100 DEG C of the temperature control of former furnace chamber 2, radian is 165 °；1230 DEG C of the temperature control in end reducing furnace chamber 3,75 ° of radian；Cooling stove
45 ° of the radian in chamber 4.Furnace bottom rotated a circle the time for 180 minutes, and the ZnO in pelletizing is reduced into metallic zinc in prereduction furnace chamber
Enter flue gas, the pelletizing after dezincification is reduced into metallized pellet product in end reducing furnace chamber and discharges from discharging opening.Metallization ball
Group's ferrous metal rate 93%, zinc removal efficiency 90%, Zn grade 67% in dust.
Claims (10)
1. a kind of system processing zinc-containing dust is it is characterised in that include：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 of scum separation 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：Described annular roaster (S200) include housing, siege with
And driving means；Described housing forms annular furnace chamber, and siege is rotatable and bottom, driving means and siege that be located at annular furnace chamber
It is connected；Wherein, annular furnace chamber by the barricade (7) of multiple radial directions be divided into head and the tail be sequentially connected furnace chamber (1), pre-reducing furnace are dried
Chamber (2), end reducing furnace chamber (3) and cooling furnace chamber (4)；It is provided with feeding mouth (5) drying furnace chamber (1), be provided with cooling furnace chamber (4)
Discharging opening (6).
4. according to the system described in claim 3 it is characterised in that：Described barricade (7) is from the roof of housing and side wall downwards
Extend and keep interval with siege；Preferably, described interval is 10-20cm；
It is provided with multiple radial canals (10) in prereduction furnace chamber (2)；End reducing furnace chamber (3) is equipped with flame heating device (8)；Cold
But the roof of furnace chamber (4) is provided with water cooling plant；Corresponding in the middle part of the outside furnace wall of prereduction furnace chamber (2), flue is set, flue
The other end is connected with the entrance of described zinc recovering system (S300)；It is provided with heat exchange between end reducing furnace chamber and drying furnace chamber
Device (9), the high-temp waste gas in end reducing furnace chamber are transmitted to drying furnace chamber.
5. system according to claim 3 it is characterised in that：Dry feeding mouth (5) and cooling furnace chamber (4) of furnace chamber (1)
Discharging opening (6) be configured according to the mode of minimum spacing；The angle that the drying furnace chamber (1) of described body of heater accounts for annular furnace chamber is
45 ° -90 °, the angle that prereduction furnace chamber (2) accounts for annular furnace chamber is 150 ° -210 °, and end reducing furnace chamber (3) account for the angle of annular furnace chamber
Spend for 45 ° -90 °, the angle that cooling furnace chamber (4) accounts for annular furnace chamber is 30 ° -45 °.
6. the system described in a kind of application claim 1-5 any one processes the method for zinc-containing dust it is characterised in that wrapping
Include：
(1) zinc-containing dust, reducing agent and binding agent are carried out in feedstock pre-processing system (S100) successively mixing, moisten mill, make
Ball and drying and processing obtain the pelletizing dried；
(2) pelletizing dried is passed through charging aperture (5) cloth of annular roaster (S200) on siege, open driving means, drive
Pelletizing on dynamic siege sequentially passes through and furnace chamber (1), prereduction furnace chamber (2), end reducing furnace chamber (3) and cooling furnace chamber (4) is dried,
The discharging opening (6) passing through to cool down furnace chamber (4) afterwards is discharged；
(3) enter scum piece-rate system (S400) after the pelletizing cooling discharged and carry out ore grinding process and magnetic separation process successively, obtain
Metal iron powder and magnetic separation tailings；The high-temperature flue gas producing in prereduction furnace chamber (2) eventually enter into zinc recovering from the outlet of flue
System (S300), collects the valuable metal dust obtaining volatilizing.
7. in accordance with the method for claim 1 it is characterised in that：Zinc-containing dust, reducing agent and binding agent are pressed in (1) by step
According to 100:16～24:1～5 mass ratio is mixed in feedstock pre-processing system (S100)；Described reducing agent is selected from
The mixture of one or more of metallurgical coke, semi-coke, petroleum coke, coal, semicoke；Described binding agent is bentonite or starch is molten
Liquid.
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 be less than 0.074mm material account for more than 80%；Step (1) is by zinc-containing dust, reducing agent and bonding
When agent carries out pelletizing in feedstock pre-processing system (S100), the diameter controlling pelletizing is between 6～12mm；In described green pellets
Moisture content account for the 6-10% of pelletizing gross mass.
9. in accordance with the method for claim 6 it is characterised in that：The temperature control drying furnace chamber (1) is 250 DEG C～400 DEG C；
The temperature control of prereduction furnace chamber (2) is 900 DEG C～1100 DEG C；The temperature control in end reducing furnace chamber (3) is 1200 DEG C～1300
℃；The temperature control of cooling furnace chamber (4) is 900 DEG C～1150 DEG C.
10. in accordance with the method for claim 9 it is characterised in that：Dry furnace chamber (1) and adopt height produced by end reducing furnace chamber
Warm waste gas makees thermal source；Prereduction furnace chamber (2) by way of radial canal (10) heats by the temperature control of this furnace chamber be 900 DEG C～
1100℃；End reducing furnace chamber (3) adopts flame heating device (8) to be 1200 DEG C～1300 DEG C by the temperature control of this furnace chamber；Cold
But the pelletizing temperature control through this furnace chamber is 900 DEG C～1150 DEG C using the water cooling plant being arranged on roof by furnace chamber (4).
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| CN201610973841.XA CN106399700A (en) | 2016-11-03 | 2016-11-03 | Method and system for treating zinc-bearing dust |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106893866A (en) * | 2017-02-23 | 2017-06-27 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN108796217A (en) * | 2018-08-14 | 2018-11-13 | 宝钢工程技术集团有限公司 | A kind of device and method that zinc-iron-containing dust mud resource utilizes |
| CN109097588A (en) * | 2018-10-26 | 2018-12-28 | 宝钢工程技术集团有限公司 | A kind of device and method that iron content solid wastes recycling containing zinc utilizes |
| CN110564957A (en) * | 2019-10-21 | 2019-12-13 | 中冶节能环保有限责任公司 | Treatment device and method for efficiently removing zinc from zinc-containing dedusting ash of iron and steel enterprises |
| CN111676377A (en) * | 2020-06-04 | 2020-09-18 | 北京科技大学 | A method for cyclic enrichment and recovery of zinc powder in zinc-containing dust in flash furnace |
| CN112410566A (en) * | 2020-03-18 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and device for processing zinc-containing dust through pre-reduction microwave sintering |
| CN115978552A (en) * | 2022-12-23 | 2023-04-18 | 四川万里锌业有限公司 | Zinc-containing hazardous waste solidification treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893866A (en) * | 2017-02-23 | 2017-06-27 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN106893866B (en) * | 2017-02-23 | 2019-05-03 | 中冶南方工程技术有限公司 | A kind of processing method of zinc-containing dust |
| CN108796217A (en) * | 2018-08-14 | 2018-11-13 | 宝钢工程技术集团有限公司 | A kind of device and method that zinc-iron-containing dust mud resource utilizes |
| CN108796217B (en) * | 2018-08-14 | 2024-04-19 | 宝钢工程技术集团有限公司 | Device and method for recycling zinc-containing and iron-containing dust mud |
| CN109097588A (en) * | 2018-10-26 | 2018-12-28 | 宝钢工程技术集团有限公司 | A kind of device and method that iron content solid wastes recycling containing zinc utilizes |
| CN110564957A (en) * | 2019-10-21 | 2019-12-13 | 中冶节能环保有限责任公司 | Treatment device and method for efficiently removing zinc from zinc-containing dedusting ash of iron and steel enterprises |
| CN112410566A (en) * | 2020-03-18 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and device for processing zinc-containing dust through pre-reduction microwave sintering |
| CN111676377A (en) * | 2020-06-04 | 2020-09-18 | 北京科技大学 | A method for cyclic enrichment and recovery of zinc powder in zinc-containing dust in flash furnace |
| CN111676377B (en) * | 2020-06-04 | 2022-02-18 | 北京科技大学 | Method for recycling zinc powder in zinc-containing dust through cyclic enrichment of flash furnace |
| CN115978552A (en) * | 2022-12-23 | 2023-04-18 | 四川万里锌业有限公司 | Zinc-containing hazardous waste solidification treatment method |
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