CN107385222B - The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system - Google Patents
The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system Download PDFInfo
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- CN107385222B CN107385222B CN201710837983.8A CN201710837983A CN107385222B CN 107385222 B CN107385222 B CN 107385222B CN 201710837983 A CN201710837983 A CN 201710837983A CN 107385222 B CN107385222 B CN 107385222B
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- dedusting ash
- ash
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of carbon containing dedusting ash reuse methods of rotary kiln, dedusting ash sizing is taken to utilize technique, it is that granularity is greater than the part of 2mm and no more than the part of 2mm by dust setting ash, wherein dedusting ash of the granularity greater than 2mm is directly coated in pelletizing surface, it not only reduces investment outlay, also using the temperature of dedusting ash as mixing pelletizing predry drying prescription, is conducive to improve pellet strength, carbon inside dedusting ash is adhered to pelletizing surface, is also used as outer with surface reduction agent use；Dedusting ash dedusting ash phosphorus content of the granularity no more than 2mm for being sent into kiln hood participates in the reduction reaction in rotary kiln enough, to the metallics in reducting pellet, is conducive to improve recovery rate of iron；It realizes the processing of dedusting ash internal resourceization, especially brings considerable economic benefit and environmental benefit to lateritic nickel ore direct-reduction technique.
Description
Technical field
The present invention relates to metallurgical technology technical field more particularly to a kind of carbon containing dedusting ash reuse methods of rotary kiln and carbon containing
Dedusting ash reclaiming system.
Background technique
Steel production is made of multiple working procedures such as raw material (sintering, pelletizing, coking), ironmaking, steel-making, steel rolling, thus can be produced
The raw various dedusting ash for accounting for output of steel 5%~10%, including sintering dust separation ash, coking dedusting ash, blast furnace dedusting ash and dirt mud, turn
Furnace dedusting ash, electric stove dust ash, mill scale and dirt mud etc..The carbon containing iron content of these dedusting ash is valuable secondary resource, such as laterite
Carbon content 15~5% in the dedusting ash generated during nickel fibers, nickel content 1.1~1.8%, the content of iron is up to 15~
24%.However due to complicated component, granularity variation and moisture fluctuation greatly etc., so that the utilization of dedusting ash more difficulty.It is red
The dedusting ash generated during native nickel fibers all uses at present and concentrates pelletizing or mix with raw material, but due to dedusting ash granularity
It is smaller, and pass through high-temperature sintering process, surface hydrophobic is strong, be difficult to pelletize, into mixing machine after be difficult to mix with other raw materials
Uniformly, not only prevent Mini Pelletized Sinter Process from playing one's part to the full, and dedusting ash needs to transport repeatedly in ingredient pelletizing, meeting
Cause reentrainment of dust, working environment is adversely affected, while the reuse mode is artificial, water, electricity are at high cost, processing charges is every
The moon increases by 500,000, and economy is not ideal.In view of this, how dedusting ash to be allowed scientifically and rationally to be recycled, become
Waste be changed into values, is the project for being worth research.
Summary of the invention
The purpose of the present invention one is to provide a kind of carbon containing dedusting ash reuse method of more environmentally friendly rotary kiln.
Realizing the technical solution of the object of the invention one is: a kind of carbon containing dedusting ash reuse method of rotary kiln comprising following
Step:
1) it collects: the carbon containing dedusting ash of rotary kiln is collected into specified feed bin；
2) it sieves: screening out 2mm granularity dedusting ash below using screening mechanism and granularity is greater than the dedusting ash of 2mm；
3) dedusting ash by granularity greater than 2mm is sent to pelletizing conveyer mixes with pelletizing, and is sent into rotary kiln with pelletizing
Tail；
4) dedusting ash by granularity no more than 2mm is sent into rotary kiln end through air hose and carries out full combustion reaction.
Preferably, the feed bin in the step 1) is heat preservation feed bin, and the dedusting ash received to prevent non-return is cooling, improves dedusting ash
Utilization efficiency.
Preferably, using kiln hood combustion fan air hose as the air hose described in step 4), existing kiln hood is directly utilized
Combustion fan air hose keeps reclaiming system structure more compact without in addition adding air hose.
Preferably, the screening mechanism in the step 2) is installed on bin bottom, reclaiming system structure is more compact.
Preferably, the first ash of installation between the pelletizing conveyer in the Yu Suoshu step 2) screening mechanism and step 3)
Storehouse, dedusting ash of the granularity greater than 2mm is sent into the first ash cellar, then send from the first ash cellar to pelletizing conveyer and mix with pelletizing；Yu Bu
Second ash cellar is installed, dedusting ash of the granularity no more than 2mm is sent into the second ash cellar, then leads between rapid 2) the described screening mechanism and air hose
Storehouse pump is crossed to be transported in air hose.
The carbon containing dedusting ash reuse method of the rotary kiln that the present invention realizes, the beneficial effect is that:
1, process flow is short, solves the problems, such as the secondary use for the dedusting ash that Dr Kiln generates, can maximum effect
Valuable element in the recycling sludge of fruit, obtains good economic benefit and environmental benefit.
2, compared with directly participating in ingredient pelletizing, the granularity screened out by screening mechanism is direct greater than the dedusting ash of 2mm
It is wrapped in pelletizing surface, is not only reduced investment outlay, also is conducive to mention as mixing pelletizing predry drying prescription using the temperature of dedusting ash
High pellet strength, the carbon inside dedusting ash are adhered to pelletizing surface, are also used as outer using with surface reduction agent.
3, the granularity for being sent into kiln hood is anti-less than the reduction that the dedusting ash dedusting ash phosphorus content of 2mm participates in rotary kiln enough
It answers, to the metallics in reducting pellet, is conducive to improve recovery rate of iron.
4, the present invention breaks through conventional dust removal ash reuse mode, takes dedusting ash sizing using technique, makes directly to go back method time
Dedusting ash in rotary kiln is sufficiently recycled, and is realized internal resourceization processing, is especially come to lateritic nickel ore direct-reduction process bands
Considerable economic benefit and environmental benefit.
The second purpose of the present invention is to provide a kind of carbon containing dedusting ash reuse methods of rotary kiln described in goal of the invention one to use
Carbon containing dedusting ash reclaiming system.
The technical solution for realizing the object of the invention two is a kind of carbon containing dedusting ash reclaiming system comprising feed bin, screening machine
Structure and rotary kiln, the screening mechanism are set to below feed bin, the screening mechanism include big granularity dedusting ash discharge end and
The discharge end of small grain size dedusting ash discharge end, the big granularity dedusting ash is connected to pelletizing conveyer, the discharging of small grain size dedusting ash
End is connected to via air hose with the kiln hood of rotary kiln.
Preferably, the air hose is kiln hood combustion fan air hose.
Preferably, further include the first ash cellar for accepting big granularity dedusting ash and for accepting small grain size dedusting ash
Second ash cellar, first ash cellar are located at below the big granularity discharge end of screening mechanism, and the discharge end of first ash cellar leads to
Pelletizing conveyer；Second ash cellar is located at below the small grain size discharge end of screening mechanism, the discharge end of second ash cellar with
The pump connection of one storehouse, an air compressor are connect with Cang Bengguandao, and the storehouse pump is connected to air hose.
Preferably, a certain amount of batcher is installed between the discharge end and pelletizing conveyer of first ash cellar.By fixed
Amount feed guarantees that pelletizing is uniformly mixed with carbon containing dedusting ash.
Preferably, the feed bin is heat preservation feed bin.
The carbon containing dedusting ash reclaiming system that the object of the invention two is realized, structure is simple, and occupied area is small, passes through screening machine
Structure sieves varigrained dedusting ash, and the dedusting ash after screening is sent respectively combustion-supporting to pelletizing conveyer and kiln hood
Blower air hose realizes the abundant recycling to carbon containing dedusting ash.
Detailed description of the invention
Fig. 1 is carbon containing dedusting ash reclaiming system structural schematic diagram described in the embodiment of the present invention, wherein arrow represents carbon containing remove
Dust trend.
Specific embodiment
Present pre-ferred embodiments are described in detail below in conjunction with attached drawing.
As shown in Figure 1, a kind of carbon containing dedusting ash reclaiming system comprising feed bin 1, screening mechanism 2, for accepting big granularity
First ash cellar 3 of dedusting ash, for accepting the second ash cellar of small grain size dedusting ash 4 and rotary kiln 10, the screening mechanism 2 is arranged
In 1 bottom of feed bin, first ash cellar 3 is located at 21 lower section of big granularity discharge end of screening mechanism 2, and second ash cellar 4 is located at
The lower section of small grain size discharge end 22 of screening mechanism 2, the discharge end 31 of first ash cellar 3 lead to pelletizing conveyer 20, and described the
A certain amount of batcher 5, the discharge end of second ash cellar 4 are installed between the discharge end 31 and pelletizing conveyer 20 of one ash cellar 3
41 are connected to storehouse pump 6, and an air compressor 7 pumps 6 pipelines with the storehouse and connect, the storehouse pump 6 and kiln hood combustion fan air hose
30 connections.
The present invention also provides a kind of carbon containing dedusting ash reuse methods of rotary kiln comprising following steps:
1) it collects: the carbon containing dedusting ash of rotary kiln is collected into the feed bin 1；
2) it sieves；Carbon containing dedusting ash falls into screening mechanism 2 from 1 bottom of feed bin, using screening mechanism screen out 2mm granularity with
Under dedusting ash and granularity be greater than 2mm dedusting ash；
3) by granularity greater than 2mm dedusting ash be sent into the first ash cellar 3, then from the first ash cellar 3 send to pelletizing conveyer 20 with
Pelletizing mixing, and with the kiln tail 101 of pelletizing feeding rotary kiln 10；
4) dedusting ash by granularity no more than 2mm is sent into the second ash cellar 4, then is sent to kiln hood combustion fan wind by storehouse pump 6
In pipe 30, the kiln hood 102 for being ultimately delivered to rotary kiln 10 carries out full combustion reaction.
Dr Kiln pelletizing moisture content needs dry tack free ability after coming out from ball press in 15-17%, pelletizing
Reach certain intensity, dedusting ash of the granularity that the present invention screens out screened mechanism greater than 2mm is as predry drying prescription, temperature
Degree reaches 75-230 DEG C, after coming into full contact with pelletizing, absorbs the moisture on pelletizing surface, increases the intensity of pelletizing, reduces pelletizing
The pulverization rate being transmitted to during rotary kiln reduces primary dedusting ash generation rate.Carbon containing 15-25% inside dedusting ash simultaneously, carbon
It is wrapped in pelletizing surface, under rotary kiln high temperature action, reduction reflection occurs with metal in pelletizing.Carbon and pelletizing in dedusting ash
Match carbon reciprocation in itself, improves metal reduction rate, further increase recovery rate of iron；Granularity is carbon containing no more than 2mm's
Dedusting ash is sent directly into kiln hood burning, since its granularity is small, full combustion can be obtained, while avoiding and materials from bonding in rotary kiln
Lead to ring formation；Improved dedusting ash reuse technology is not necessarily to use water, and manpower and power consumption are small, and every month, processing charges only needed 12
Ten thousand or so, economy is greatly improved compared with traditional scheme.
Feed bin of the present invention preferably keeps the temperature feed bin, and the dedusting ash received to prevent non-return is cooling, improves the utilization of dedusting ash
Efficiency；The constant feeder may be selected to be arranged, and the discharge end installation constant feeder in the present embodiment in the first ash cellar can be protected
Card pelletizing is uniformly mixed with carbon containing dedusting ash；First ash cellar and the second ash cellar can select to be arranged as needed, this implementation
Example keeps the dedusting ash dosage after screening controllable using ash cellar, and technological operation is more flexible；The present invention is used for transmission small grain size dedusting
The air hose of ash is not limited to kiln hood combustion fan air hose, can also in addition add air hose towards kiln hood, but directly using existing
Kiln hood combustion fan air hose is more convenient, and improvement cost is low；The screening mechanism is that routinely screening is set for this fields such as roller screen
It is standby, the pelletizing conveyer, batcher structure be also this field conventional structure, therefore not to repeat here.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent process transformation made by bright description is applied directly or indirectly in other relevant technical fields, and similarly wraps
It includes in scope of patent protection of the invention.
Claims (10)
1. a kind of carbon containing dedusting ash reuse method of rotary kiln, it is characterised in that: itself the following steps are included:
1) it collects: the carbon containing dedusting ash of rotary kiln is collected into specified feed bin；
2) it sieves: screening out 2mm granularity dedusting ash below using screening mechanism and granularity is greater than the dedusting ash of 2mm；
3) dedusting ash by granularity greater than 2mm is sent to pelletizing conveyer mixes with pelletizing, and is sent into rotary kiln with pelletizing；
4) dedusting ash by granularity no more than 2mm is sent into rotary kiln end through air hose and carries out full combustion reaction.
2. the carbon containing dedusting ash reuse method of rotary kiln according to claim 1, it is characterised in that: the material in the step 1)
Storehouse is heat preservation feed bin.
3. the carbon containing dedusting ash reuse method of rotary kiln according to claim 1, it is characterised in that: use kiln hood combustion fan
Air hose is as the air hose described in step 4).
4. the carbon containing dedusting ash reuse method of rotary kiln according to claim 1, it is characterised in that: will be in the step 2)
Screening mechanism is installed on bin bottom.
5. the carbon containing dedusting ash reuse method of rotary kiln according to claim 1, it is characterised in that: Yu Suoshu step 2) is described
First ash cellar is installed, dedusting ash of the granularity greater than 2mm is sent into the first ash between the pelletizing conveyer in screening mechanism and step 3)
Storehouse, then give from the first ash cellar to pelletizing conveyer and mixed with pelletizing；Is installed between the step 2) screening mechanism and air hose
Two ash cellars, dedusting ash of the granularity no more than 2mm is sent into the second ash cellar, then is transported in air hose by storehouse pump.
6. a kind of carbon containing dedusting ash reclaiming system, it is characterised in that: it includes feed bin, screening mechanism and rotary kiln, the screening
Mechanism is set to below feed bin, and the screening mechanism includes big granularity dedusting ash discharge end and small grain size dedusting ash discharge end,
The discharge end of the big granularity dedusting ash is connected to pelletizing conveyer, and small grain size dedusting ash discharge end is via air hose and rotary kiln
Kiln hood connection.
7. carbon containing dedusting ash reclaiming system according to claim 6, it is characterised in that: the air hose is kiln hood combustion fan
Air hose.
8. carbon containing dedusting ash reclaiming system according to claim 6, it is characterised in that: it further includes for accepting big granularity
First ash cellar of dedusting ash and for accepting the second ash cellar of small grain size dedusting ash, first ash cellar is located at the big of screening mechanism
Below granularity discharge end, the discharge end of first ash cellar leads to pelletizing conveyer；Second ash cellar is located at screening mechanism
Below small grain size discharge end, the discharge end of second ash cellar is connected to storehouse pump, and an air compressor is connect with Cang Bengguandao,
The storehouse pump is connected to air hose.
9. carbon containing dedusting ash reclaiming system according to claim 8, it is characterised in that: the discharge end of first ash cellar with
A certain amount of batcher is installed between pelletizing conveyer.
10. carbon containing dedusting ash reclaiming system according to claim 6, it is characterised in that: the feed bin is heat preservation feed bin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710837983.8A CN107385222B (en) | 2017-09-18 | 2017-09-18 | The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system |
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| CN201710837983.8A CN107385222B (en) | 2017-09-18 | 2017-09-18 | The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system |
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| CN107385222A CN107385222A (en) | 2017-11-24 |
| CN107385222B true CN107385222B (en) | 2019-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108928651A (en) * | 2018-05-30 | 2018-12-04 | 武汉钢铁有限公司 | A kind of closed collection processing/transfer system of metallurgy dedusting ash and technique |
| CN116727069B (en) * | 2022-12-29 | 2023-11-10 | 略阳县豫都炉料有限公司 | Processing system and method for recycling dedusting ash |
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| CN103866131A (en) * | 2014-03-13 | 2014-06-18 | 北京科技大学 | Method for recycling blast furnace fly ash containing zinc |
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| CN107083480A (en) * | 2017-04-21 | 2017-08-22 | 山西太钢不锈钢股份有限公司 | A kind of dedusting ash ball press technique |
| CN207483809U (en) * | 2017-09-18 | 2018-06-12 | 宝钢德盛不锈钢有限公司 | Carbon containing dedusting ash reclaiming system |
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2017
- 2017-09-18 CN CN201710837983.8A patent/CN107385222B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866131A (en) * | 2014-03-13 | 2014-06-18 | 北京科技大学 | Method for recycling blast furnace fly ash containing zinc |
| CN104046773A (en) * | 2014-06-25 | 2014-09-17 | 重庆科健冶金材料有限公司 | Technique for producing cold-bonded pellets from steel converter dust removal ash |
| 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 |
| CN106367600A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for treating high-zinc iron-containing slime through utilizing rotary kiln |
| CN107083480A (en) * | 2017-04-21 | 2017-08-22 | 山西太钢不锈钢股份有限公司 | A kind of dedusting ash ball press technique |
| CN207483809U (en) * | 2017-09-18 | 2018-06-12 | 宝钢德盛不锈钢有限公司 | Carbon containing dedusting ash reclaiming system |
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