CN107619946A - Comprehensive utilization method of blast furnace flue gas dedusting ash - Google Patents
Comprehensive utilization method of blast furnace flue gas dedusting ash Download PDFInfo
- Publication number
- CN107619946A CN107619946A CN201710742708.8A CN201710742708A CN107619946A CN 107619946 A CN107619946 A CN 107619946A CN 201710742708 A CN201710742708 A CN 201710742708A CN 107619946 A CN107619946 A CN 107619946A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- flue gas
- dedusting ash
- zinc
- furnace flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000003546 flue gas Substances 0.000 title claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000011701 zinc Substances 0.000 claims abstract description 55
- 229910052742 iron Inorganic materials 0.000 claims abstract description 52
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 43
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000012141 concentrate Substances 0.000 claims abstract description 35
- 238000007885 magnetic separation Methods 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 26
- 239000000428 dust Substances 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 239000004484 Briquette Substances 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000011787 zinc oxide Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 230000001698 pyrogenic effect Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009858 zinc metallurgy Methods 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 2
- 239000011707 mineral Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000007789 gas Substances 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000011133 lead Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 238000005111 flow chemistry technique Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000707825 Argyrosomus regius Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910001656 zinc mineral Inorganic materials 0.000 description 1
Classifications
-
- 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
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a blast furnace flue gas dedusting ash comprehensive utilization method, which comprises the steps of introducing blast furnace flue gas dedusting ash into a wind power classification-wind magnetic separation system, obtaining air separation iron ore concentrate through wind power classification, obtaining magnetic separation iron ore concentrate through wind magnetic separation, and returning the air separation iron ore concentrate and the magnetic separation iron ore concentrate to sintering and smelting processes for use; mixing dry tail ash collected by a bag-type dust collector with the pulverized reducing coal and a binder to prepare a briquette, roasting the briquette at high temperature to reduce iron oxide and zinc oxide in the briquette, gasifying zinc, then feeding into a flue gas recovery system, cooling the briquette to obtain a metallized briquette for use by a blast furnace and a converter; collecting dust in the flue gas recovery system, namely zinc-rich mineral powder, and using the dust as a zinc smelting and extracting raw material. The invention solves the problems of resource waste, energy waste, low treatment cost performance and the like caused by large zinc content fluctuation in the blast furnace flue gas dust when the blast furnace flue gas dust is treated by the existing physical dezincification method; can extract iron ore concentrate and zinc-rich mineral powder.
Description
Technical field
The present invention relates to Metallurgical Solid Wastes technical field of comprehensive utilization, more particularly to a kind of blast furnace flue gas dedusting ash synthesis profit
Use method.
Background technology
Steel smelting procedure each operation can all produce substantial amounts of dirt mud, because dirt mud has certain reuse value, steel
Enterprise returns to sintering generally as secondary raw material and utilized.At present, it is continuously increased with solid waste caused by steel industry,
Environmental protection problem highlights increasingly.Moreover, the recycling in sintering with these solid waste, harmful element is constantly enriched with,
Quality and process direct motion to sintering deposit cause to significantly affect.
At present, domestic recycling of many iron and steel enterprises by zinc-containing dust, sludge in sintering system, causes Zn-ef ficiency
Serious enrichment, Zn-ef ficiency is brought into brings significant damage to smelting, mainly has：1. form accretion at positions such as furnace throat clinker tiles；②
Because dross can cause upper blast furnace Gas Flow disorderly in stove caused by zinc aggregation, there is hanging and collapse material phenomenon；3. destroy furnace lining
Shell of blast furnace is caused to ftracture；4. condensed in blast furnace gas ascending pipe, gather and cause to rise pipe choking；5. sunk at blast-furnace tuyere
Product, refractory material is corroded and causes brick body loose, cause air port to upwarp or damaged；6. causing coke ratio to rise, the saturating of stock column is reduced
Gas；7. stokehold operating environment is severe, poor visibility.Place is processed therefore, it is necessary to which zinc-containing dust, sludge are separated
Reason.How to turn waste into wealth, these dust, sludge are subjected to recycling and harmless treatment, reduces environmental pollution, has become steel
The problem of iron enterprise is extremely urgent.On the other hand, China is a big steel country, and largely abandoning or arrange outside for metallurgical solid waste causes
The substantial amounts of wasting of resources, it, which recycles and recycled, also complies with China's Green Sustainable strategic requirement.
In the 1970s, begin to reclaim the correlative study of Zn, Pb, Fe in Ferrous Metallurgy solid waste both at home and abroad, most
Closely also there is related process report.As people are to the pay attention to day by day of environmental problem, how rational exploitation and utilization dedusting ash more causes
The great attention of enterprise and environmental administration.External such as Japan, recycling of the U.S. to dust, sludge are paid much attention to, by
Professional chemical plant is handled, and has tended to recycling.The utilization of metallurgical dust, sludge includes：By metal recovery, ion exchange is used
Resin system prepares extreme high purity iron oxide, for doing essence pigment, magnetic material, catalyst etc..
Hu Xiaohong et al. delivers entitled《The research of blast furnace gas mud comprehensive utilization》Article, use magnetic separation-shaking table as most
Good technological process.Experiment gained iron ore concentrate all iron content is more than 62%.Zhang Hanquan et al. delivers entitled《Blast Furnace gas mud iron
Recovery process experimental study》Article, can obtain smart mud yield 31.8l%, iron content product using two sections of gravity separation technology flow processings
Position 61.51%, iron recovery are 51.64% more satisfactory index.Cheng Haifang et al. delivers entitled《Blast furnace gas ash it is comprehensive
Close and utilize》Article, flotation combined using weight one, the iron concentrate grade that can make to select reaches 47%~20%, and the rate of recovery reaches
49.24%.Pan Guotai et al. delivers entitled《Brief talk blast furnace dust and put forward carbon iron-extracting process science and technology》Article, using gravity treatment and weak
The technique of the last one magnetic collocation reclaims the iron in gas ash, obtains preferable treatment effect, is maximumlly returned from resource is made
Receive and utilize.Zhang Meifang et al. delivers entitled《Blast furnace of Baoshan Iron ＆ Steel Co. gas mud is recycled with beneficiation method》Article, laboratory use
Flotation-magnetic separation or magnetic separation-flotation combined flow processing blast furnace of Baoshan Iron ＆ Steel Co. dust, the iron ore concentrate of iron content 60% can be obtained, while recovery contains
The carbon powder of carbon 67%.Above several method is the method that several Physicals deviate from zinc in dedusting ash, and technique is relatively simple, processing
Cost is relatively low, but treatment effect is not notable enough.
Wang Jing pines et al. are delivered entitled《Steel plant's zinc-containing dust rotary hearth furnace direct-reduction and dezincification experimental study》Using
Carbon-burdened pellet is made in steel plant's zinc-containing dust, and simulation rotary hearth furnace reduces 10min, gold under the conditions of 1300 DEG C and neutral atmosphere
Belong to rate up to 80%, dezinc degree is up to 97%；She Xuefeng et al. is delivered entitled《Zinc, lead and alkali gold removing behavior in metallurgical dust
Research》Carbonaceous pelletizing is made using iron and steel enterprise's zinc-containing dust, simulates rotary hearth furnace experiment under the high temperature conditions, is 1 in carbon-to-oxygen ratio,
Degree of metalization is more than 70% when 15min is reduced under the conditions of 1250-1300 DEG C of temperature, and dezinc degree reaches 93.4%-98.8%.Horse sunlight etc.
People delivers entitled《Blast furnace dust dezincification based on roasting experiment, de- lead basic research》Blast furnace dust is removed using pyrogenic process
In zinc, explore and analyze the factors such as roasting time, sintering temperature, basicity and chloride additive level to dezincification effect
Affecting laws, optimize pyrogenic process dezincification parameter.These methods handle Zinc-Bearing Wastes significant effect, but rotary hearth furnace process processing contains zinc
Dirt mud one-time investment is huge, and cost and energy consumption are too high, and economic benefit is not notable, more difficult big in today of iron and steel enterprise's meagre profit
Area popularization and application.
All flourish grandsons et al. deliver entitled《Blast furnace dust ammonia soaks dezincification》Article, research made using ammoniacal liquor and ammonium chloride
Deviate from the zinc in blast furnace dust for leaching agent.Optimal extract technology condition is：Using liquid-solid ratio 4:After 1 mixing, adopt at room temperature
3h is stirred with 600r/min speed.On this condition, zinc leaching rate is up to 89%.The method carries zinc solution process compared to pyrogenic process
Flow is simple, and scale of investment is smaller, and processing cost is relatively low, and dezincification significant effect.But due to Zn content in blast furnace dust
Fluctuation range is larger, or even Zn content differs more than 30 times in the different blast furnace dusts of same steel mill.Deviate from using this scheme
During zinc in low zinc gas ash, cause unavoidably excessive with addition of leaching agent, cause the wasting of resources.So in industrial processes
Because the fluctuation of gas ash zinc content brings difficulty to the amount of allocating of leaching agent.
The superfine people of Zhao Rui deliver entitled《From the experimental study of blast furnace dust recovery iron》Article, research is using weak
The method of magnetic-strong magnetic two-stage magnetic separation separates the iron mineral in gas ash and zinc mineral, then by magnetic roasting process by gas
Zinc in ash is further backing out, and is finally obtained grade 60.7%, the iron ore concentrate of the rate of recovery 70%.The process program by magnetic separation with
Pyrogenic process dezincification process integration gets up, and achieves preferable treatment effect, and more have compared to simple pyrogenic process dezincification technique
Economy, but weak magnetic-strong magnetic two-stage gradient magnetic separation effect needs further to be improved, and still suffer from pyrogenic process and take off asking for lead high energy consumption
Topic.The method of processing blast furnace flue gas dedusting ash, which is summed up mainly, at present Physical, pyrogenic process and wet method, in the prior art generally
Using one kind in three kinds of methods, or any two kinds are combined.It is affected by many factors, Zn content in blast furnace flue gas dedusting ash
Fluctuate it is huge, and in existing method, single alternative generally existing treatment effect is undesirable or energy consumption and resource consumption it is big, be processed into
The shortcomings of this is high, and also not yet found in integrated processes a kind of efficient, low input, low energy consumption, low cost and for it is various into
The generally applicable treating method of the dedusting ash of dtex point.
The content of the invention
The invention provides a kind of blast furnace flue gas dedusting ash method of comprehensive utilization, solves existing physics dezincification method processing
During blast furnace flue gas dedusting ash due in blast furnace flue gas dedusting ash Zn content fluctuation it is big and caused by the wasting of resources, energy waste, place
Manage the problems such as cost performance is low；Not only realize the harmless treatment of blast furnace flue gas dedusting ash, and can it is economical, easily extract
Go out iron ore concentrate and zinc-rich miberal powder, create considerable economic benefit.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of blast furnace flue gas dedusting ash method of comprehensive utilization, comprises the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., removed blast furnace flue gas by air blower
Dirt ash is blown into air channel, separates the big granularity dedusting ash of d >=25 μm by air classification in first paragraph air channel, obtains wind
Select iron ore concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, lead to
Cross wind magnetic separation to separate the magnetic material in fine granularity dedusting ash, obtain magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the cloth bag of air channel tail end
Deduster collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelting
Process is refined to use；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:
0.15~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and enter cigarette after zinc gasification
Gas recovery system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
During the air classification, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash
Charging rate is 320~350kg/h.
The magnetic field intensity of the concentration equipment is 8000~11000Oe.
The agglomerate sintering temperature is 950~1150 DEG C, and roasting time is 25~30min.
The carbon containing reducer is coal dust or coke powder, and granularity is 100~300 mesh.
Compared with prior art, the beneficial effects of the invention are as follows：
1) by selection by winnowing+magnetic separation+pyrogenic process Zn extraction process, solves existing physics dezincification method due to blast furnace flue gas dedusting ash
The fluctuation of middle Zn content it is big and caused by the wasting of resources, energy waste, the problems such as processing cost performance is low；
2) harmless treatment of blast furnace flue gas dedusting ash is not only realized, reduction Zn-ef ficiency brings all kinds of to smelting production
Harm, and realize the comprehensive utilization of resource；
3) technique simple possible, it is economical and practical, iron ore concentrate and zinc-rich miberal powder can be easily extracted, creates considerable warp
Ji benefit.
Brief description of the drawings
Fig. 1 is a kind of process chart of blast furnace flue gas dedusting ash method of comprehensive utilization of the present invention.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of blast furnace flue gas dedusting ash method of comprehensive utilization of the present invention, comprises the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., removed blast furnace flue gas by air blower
Dirt ash is blown into air channel, separates the big granularity dedusting ash of d >=25 μm by air classification in first paragraph air channel, obtains wind
Select iron ore concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, lead to
Cross wind magnetic separation to separate the magnetic material in fine granularity dedusting ash, obtain magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the cloth bag of air channel tail end
Deduster collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelting
Process is refined to use；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:
0.15~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and enter cigarette after zinc gasification
Gas recovery system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
During the air classification, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash
Charging rate is 320~350kg/h.
The magnetic field intensity of the concentration equipment is 8000~11000Oe.
The agglomerate sintering temperature is 950~1150 DEG C, and roasting time is 25~30min.
The carbon containing reducer is coal dust or coke powder, and granularity is 100~300 mesh.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2800Pa, regulation magnetic field intensity to 11000Oe, blast furnace flue gas dedusting ash sample is added dry
Select in system, charging rate 320kg/h, be collected into selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash.
By dry tail ash with the reduction coal after grinding, binding agent by weight 1:0.2:0.04 mixing, is made after well mixed
Iron content agglomerate.Agglomerate is placed in tube furnace in 1100 DEG C of roasting temperature 30min, collects caused metallization group in course of reaction
Dedusting ash (i.e. zinc-rich miberal powder) in block and fume recovery system, chemical analysis, blast furnace flue gas dedusting are carried out to raw material and product
Grey main component is as shown in table 1；
The blast furnace flue gas dedusting ash main component (wt%) of table 1
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 40.45 | 8.55 | 0.79 | 1.31 | 0.33 | 0.88 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 2：
The test products compositional data (wt%) of table 2
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 60.28 | 0.62 | 0.12 | 0.34 | 0.08 | 0.20 |
| Magnetic separation of iron ore concentrate | 57.93 | 0.67 | 0.07 | 0.28 | 0.10 | 0.19 |
| Zinc-rich miberal powder | 10.15 | 61.92 | 1.87 | 3.98 | 1.15 | 2.41 |
| Metallized briquette | 65.39 | 0.12 | 0.02 | 0.18 | 0.09 | 0.12 |
【Embodiment 2】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2500Pa, regulation magnetic field intensity to 10000Oe, blast furnace flue gas dedusting ash sample is added dry
Select in system, charging rate 330kg/h, be collected into selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash.
By dry tail ash with the reduction coal after grinding, binding agent by weight 1:0.2:0.05 mixing, is made after well mixed
Iron content agglomerate.Agglomerate is placed in tube furnace in 1050 DEG C of roasting temperature 25min, collects caused metallization group in course of reaction
Dedusting ash (i.e. zinc-rich miberal powder) in block and fume recovery system, chemical analysis, blast furnace flue gas dedusting are carried out to raw material and product
Grey main component is as shown in table 3；
Table 3 tests blast furnace flue gas dedusting ash component (wt%)
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 39.51 | 12.65 | 0.86 | 1.40 | 0.31 | 0.95 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 4：
The test products compositional data (wt%) of table 4
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 58.85 | 0.74 | 0.17 | 0.46 | 0.11 | 0.37 |
| Magnetic separation of iron ore concentrate | 56.23 | 0.74 | 0.12 | 0.36 | 0.05 | 0.29 |
| Zinc-rich miberal powder | 9.88 | 57.30 | 2.02 | 3.75 | 0.95 | 1.76 |
| Metallized briquette | 65.22 | 0.13 | 0.02 | 0.23 | 0.09 | 0.15 |
【Embodiment 3】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2600Pa, regulation magnetic field intensity to 9500Oe, blast furnace flue gas dedusting ash sample is added into dry separation
In system, charging rate 350kg/h, selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash are collected into.
By dry tail ash and the reduction coal after grinding, binding agent in proportion 1:0.15:0.03 mixing, is made after well mixed and contains
Iron agglomerate.Agglomerate is placed in tube furnace in 950 DEG C of roasting temperature 28min, collects caused metallized briquette in course of reaction
With the dedusting ash (i.e. zinc-rich miberal powder) in fume recovery system, chemical analysis, blast furnace flue gas dedusting ash are carried out to raw material and product
Main component is as shown in table 5；
Table 5 tests blast furnace flue gas dedusting ash component (wt%)
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 39.64 | 12.66 | 0.90 | 1.33 | 0.30 | 0.94 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 6：
The test products compositional data (wt%) of table 6
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 57.26 | 0.85 | 0.31 | 0.31 | 0.09 | 0.40 |
| Magnetic separation of iron ore concentrate | 58.93 | 0.72 | 0.17 | 0.29 | 0.14 | 0.25 |
| Zinc-rich miberal powder | 10.69 | 60.98 | 1.46 | 3.20 | 1.01 | 2.28 |
| Metallized briquette | 64.58 | 0.23 | 0.04 | 0.19 | 0.13 | 0.11 |
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of blast furnace flue gas dedusting ash method of comprehensive utilization, it is characterised in that comprise the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., by air blower by blast furnace flue gas dedusting ash
Air channel is blown into, the big granularity dedusting ash of d >=25 μm is separated by air classification in first paragraph air channel, obtains selection by winnowing iron
Concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, passes through wind
Magnetic separation separates the magnetic material in fine granularity dedusting ash, obtains magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the bag-type dust of air channel tail end
Device collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelter
Sequence uses；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:0.15
~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and are returned after zinc gasification into flue gas
Receipts system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
A kind of 2. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the wind-force point
During level, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash charging rate is 320~
350kg/h。
A kind of 3. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the magnetic separation dress
The magnetic field intensity put is 8000~11000Oe.
A kind of 4. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the agglomerate roasting
It is 950~1150 DEG C to burn temperature, and roasting time is 25~30min.
A kind of 5. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that it is described it is carbon containing also
Former agent is coal dust or coke powder, and granularity is 100~300 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742708.8A CN107619946A (en) | 2017-08-25 | 2017-08-25 | Comprehensive utilization method of blast furnace flue gas dedusting ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742708.8A CN107619946A (en) | 2017-08-25 | 2017-08-25 | Comprehensive utilization method of blast furnace flue gas dedusting ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107619946A true CN107619946A (en) | 2018-01-23 |
Family
ID=61088225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710742708.8A Pending CN107619946A (en) | 2017-08-25 | 2017-08-25 | Comprehensive utilization method of blast furnace flue gas dedusting ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107619946A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559852A (en) * | 2018-05-07 | 2018-09-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of blast furnace dust comprehensive utilization process |
| CN110203927A (en) * | 2019-06-26 | 2019-09-06 | 鞍钢股份有限公司 | Method for preparing activated carbon by using coking waste as main raw material |
| CN110747308A (en) * | 2019-11-18 | 2020-02-04 | 武汉科技大学 | Converter LT zinc-containing dust online treatment system and treatment method thereof |
| GB2578275A (en) * | 2018-07-27 | 2020-05-06 | British Steel Ltd | Agglomerate for use in iron-making and/or steel-making |
| CN111349793A (en) * | 2020-04-16 | 2020-06-30 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
| CN112708770A (en) * | 2020-12-09 | 2021-04-27 | 攀枝花钢城集团有限公司 | Method for enriching iron, zinc and carbon from gas ash |
| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN114951207A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（北京） | Resource material full utilization method for high-speed rail blast furnace ash |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447804A (en) * | 1987-08-13 | 1989-02-22 | Kawasaki Steel Co | Method for treating coal ash |
| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102506440A (en) * | 2011-10-20 | 2012-06-20 | 安徽理工大学 | Embedded dry magnetic separation purification and return powder magnetic separation regrinding process |
| CN102703714A (en) * | 2012-06-04 | 2012-10-03 | 红河锌联科技发展有限公司 | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust |
| CN104226599A (en) * | 2014-09-12 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Blast furnace dust sorting method |
| CN105483371A (en) * | 2015-12-21 | 2016-04-13 | 武钢集团昆明钢铁股份有限公司 | Method for comprehensively recycling lead and zinc containing blast furnace dust |
| CN106399702A (en) * | 2016-09-27 | 2017-02-15 | 江苏省冶金设计院有限公司 | Technology for recycling nonferrous metals in process of treating lead-zinc slag through rotary hearth furnace |
-
2017
- 2017-08-25 CN CN201710742708.8A patent/CN107619946A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447804A (en) * | 1987-08-13 | 1989-02-22 | Kawasaki Steel Co | Method for treating coal ash |
| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102506440A (en) * | 2011-10-20 | 2012-06-20 | 安徽理工大学 | Embedded dry magnetic separation purification and return powder magnetic separation regrinding process |
| CN102703714A (en) * | 2012-06-04 | 2012-10-03 | 红河锌联科技发展有限公司 | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust |
| CN104226599A (en) * | 2014-09-12 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Blast furnace dust sorting method |
| CN105483371A (en) * | 2015-12-21 | 2016-04-13 | 武钢集团昆明钢铁股份有限公司 | Method for comprehensively recycling lead and zinc containing blast furnace dust |
| CN106399702A (en) * | 2016-09-27 | 2017-02-15 | 江苏省冶金设计院有限公司 | Technology for recycling nonferrous metals in process of treating lead-zinc slag through rotary hearth furnace |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559852A (en) * | 2018-05-07 | 2018-09-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of blast furnace dust comprehensive utilization process |
| GB2578275A (en) * | 2018-07-27 | 2020-05-06 | British Steel Ltd | Agglomerate for use in iron-making and/or steel-making |
| CN110203927A (en) * | 2019-06-26 | 2019-09-06 | 鞍钢股份有限公司 | Method for preparing activated carbon by using coking waste as main raw material |
| CN110203927B (en) * | 2019-06-26 | 2022-03-22 | 鞍钢股份有限公司 | Method for preparing activated carbon by using coking waste as main raw material |
| CN110747308A (en) * | 2019-11-18 | 2020-02-04 | 武汉科技大学 | Converter LT zinc-containing dust online treatment system and treatment method thereof |
| CN110747308B (en) * | 2019-11-18 | 2023-10-13 | 武汉科技大学 | Online treatment system and method for zinc-containing dust in converter LT |
| CN111349793A (en) * | 2020-04-16 | 2020-06-30 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
| CN111349793B (en) * | 2020-04-16 | 2024-06-07 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
| CN112708770A (en) * | 2020-12-09 | 2021-04-27 | 攀枝花钢城集团有限公司 | Method for enriching iron, zinc and carbon from gas ash |
| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN114951207A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（北京） | Resource material full utilization method for high-speed rail blast furnace ash |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107619946A (en) | Comprehensive utilization method of blast furnace flue gas dedusting ash | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN102766718B (en) | Method for producing sponge iron and zinc-rich materials by blast furnace zinc-containing ash | |
| CN102534188B (en) | Method for producing iron pellet with sulfur acid residue containing large contents of impurities and enriching valuable metal | |
| CN101538645A (en) | Technique for roasting and dressing laterite nickel ore | |
| CN108220610B (en) | A kind of processing method of the dedusting ash containing heavy metal | |
| CN101403043A (en) | Method for producing ferronickel granule with direct reduction of laterite nickel mine with rotary kiln | |
| CN107604110A (en) | Method for selecting iron from blast furnace gas ash | |
| CN108130422A (en) | A kind of method that valuable metal is extracted in steel plant's flue dust | |
| CN105087947A (en) | Method for extracting zinc from blast furnace gas mud | |
| CN102560088B (en) | Composite chlorinating metallurgy method for full-value utilization of complex poor tin middling ore | |
| CN103447148A (en) | Magnetic separation device and method for reducing hematite-containing material by utilizing microwave | |
| CN106636655A (en) | Treatment method of electric furnace dust | |
| CN105838839B (en) | It prepares the method for granulated iron and prepares the system of granulated iron | |
| CN103555930A (en) | Method for reduction roasting of high-magnesium poor-quality nickel laterite | |
| CN107586962B (en) | Zinc-containing dedusting ash recycling method | |
| CN114317954A (en) | Method for cooperatively treating and utilizing stainless steel pickling sludge and blast furnace dust | |
| CN109576487A (en) | A method of iron is recycled using red mud and dedusting ash mixing reduction roasting magnetic separation | |
| CN112934478A (en) | Method for recovering iron concentrate in copper slag floating copper tailings by microwave low-temperature reduction roasting | |
| CN107586963B (en) | Comprehensive treatment method for lead-containing dedusting ash | |
| CN108330289B (en) | A kind of processing method of copper smelting by pyrometallurgy clinker | |
| CN114315255B (en) | Method for preparing high-purity alloy by using electric furnace dust removal ash and recycling tailings | |
| CN109554535A (en) | A method of iron is recycled using red mud and copper ashes tailings comprehensive | |
| CN205907324U (en) | System for handle zinc leaching residue | |
| CN112080644B (en) | Method for cooperatively treating zinc-containing dust and polycrystalline silicon cutting waste material in main channel of blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180123 |