CN106337119B - Sintering ignition method for ultra-thick material layer by adopting presintering - Google Patents
Sintering ignition method for ultra-thick material layer by adopting presintering Download PDFInfo
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- CN106337119B CN106337119B CN201610815798.4A CN201610815798A CN106337119B CN 106337119 B CN106337119 B CN 106337119B CN 201610815798 A CN201610815798 A CN 201610815798A CN 106337119 B CN106337119 B CN 106337119B
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- sinter
- sintering
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- thickness
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- 238000005245 sintering Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims description 48
- 238000004321 preservation Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 238000009827 uniform distribution Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 16
- 238000005265 energy consumption Methods 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009766 low-temperature sintering Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000032258 transport Effects 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sintering ignition method for an ultra-thick material layer by adopting presintering, which is characterized by comprising the following steps of: in the presintering process, a sinter separating device is arranged at the tail discharge position of a belt type roasting machine, high-temperature sinter with the temperature of more than or equal to 700 ℃ and the residual sinter are separated into two independent parts, the thickness of the separated high-temperature sinter is less than or equal to 1/3 of the total thickness of the sinter, after the separated high-temperature sinter is respectively crushed, the sinter with the temperature of less than 700 ℃ is distributed on a ring type cooling blower for cooling, the high-temperature sinter is uniformly distributed on the sinter mixture surface before the first ignition, and the distribution thickness is more than or equal to 50 mm; and then the ignition operation is carried out.
Description
Technical field
The present invention relates to the sintering production methods of iron ore, are related specifically to a kind of using the super deep-bed sintering being pre-sintered
Ignition method.
Background technology
In sintering production, sintering ignition plays the role of very important.It lights a fire, sintering production good permeability, sintering
Speed is fast, and yield is high, and high-quality, the rate of return mine is low.Otherwise, sintering production state difference, the rate of return mine is high, and sintering velocity is slow, influences to burn
Tie the yield and quality of ore deposit.
At present, sintering ignition is mostly the mixture of coke-stove gas and blast furnace gas, or both with coal gas, is the sintering energy
The crucial production of consumption, if to reduce the energy consumption of sintering production, common mode has：(1) igniter burner is improved；(2) it is hot
The combustion-supporting sintering of wind；(3) lower negative pressure is lighted a fire；(4) technical measures such as optimization ignition intensity.These methods can reduce to a certain extent
The consumption of coal gas, but cannot significantly reduce the consumption of coal gas.
Meanwhile in terms of sinter cooling, air blast cooling, sinter after cooling are usually carried out to sinter with ring cold machine
Sieve compartment screening is transported into through belt, the finished product sinter after screening transports blast furnace to by belt.If the cooling of ring cold machine
Effect is poor, and ring cold machine discharge pit sinter temperature is high, when by belt-conveying, can gently burn out belt, can cause fire again, sends out
Raw serious work safety accident.
Especially when Sintering Yield to be improved, so as to improve thickness of feed layer, when carrying out the production of the super thick bed of material, ring cold machine is serious
Under overload operation, this security risk but will be aggravated, tremendous influence is brought to production.
So up to the present, each enterprise can only be daily technology and the production management of ignition system, there is no directly have
The good method of the reduction gas consumption in ignition of effect, also without the method for the effectively reduction cold temperature of ring.
Invention content
The technical problems to be solved by the invention are to provide a kind of using the super thick bed of material sintering ignition method being pre-sintered.It burns
In knot production, one of maximum energy consumption is exactly sintering ignition, after pre-sintering process, there is two igniters, phase
Than being produced in individual layer normal sintering, the energy consumption of igniting greatly improves, increases sintering production cost, reduce pre-sintering work
The economy of skill.Simultaneously using after pre-sintering process, sintering output greatly improves, in the case where ring cold machine is without transformation,
Ring cold machine is difficult to effectively cool down the temperature of sinter, becomes the bottlenecks that sintering proposes production.For this purpose, the present invention makes full use of
The characteristics of ore bed top material temperature is low, and ore bed material temperature of the lower part with flourishing layer is high is sintered on sintering machine, innovative will not equality of temperature
Two parts of degree are detached, then high temperature sinter is taped against to the surface of sinter mixture before igniting for the first time, are not only reduced
Energy consumption when lighting a fire for the first time, the quality of surface sinter when improving first sintering, and after second of cloth,
Play the role of dredging material and stent, improve the gas permeability of the bed of material.
The present invention seeks to what is realized by following technical solution：
A kind of super thick bed of material sintering ignition method using pre-sintering, it is characterised in that：In pre-sintering process, in belt
Burning machine tail discharge pit sets sinter separator, and the high temperature sinter of temperature >=700 DEG C is detached with remaining sinter
Into individual two parts, the 1/3 of high temperature sinter thickness of feed layer≤total thickness of feed layer of separation, after crushing respectively, 700 DEG C of ＜'s
Sinter cloth is cooled down on ring type cooling air blower, high temperature sinter uniform distribution to prefiring sintered compound for the first time
Expect on charge level, fabric thickness >=50mm；Ignition operation is carried out again.
High temperature sinter is being transported with whole process during cloth using heat preservation obturator.
The pre-sintering process is：Sintering belt type roasting machine on be configured with first and second mixing distributing device and first,
Post-ignition hood；When first time is through mixing distributing device cloth sinter mixture, cloth layer thickness is in 500mm-900mm, point for the first time
Knot is burnt, after sintering 8-40min in advance, carries out second of cloth sinter mixture in cloth layer surface for the first time, fabric thickness exists
100mm-650mm, sintering suction pressure remain unchanged, and igniting sintering is carried out to second of bed of cloth, and second of bed of cloth is completed
During igniting, the mixture of bed of cloth is being sintered for the first time, for the first time the sum of cloth layer thickness and second cloth layer thickness >=
900mm；The sintering machine speed of service is 1.5m/min-2.5m/min in entire sintering process, is sintered suction pressure >=7000pa,
At rear of sintering machine, bed of cloth and second of bed of cloth are complete sintering for the first time.
By the way that high temperature sinter and low-temperature sintering ore deposit are adequately detached, after one side low-temperature sintering ore deposit enters ring cold machine,
The cooling load of ring cold machine is greatly lowered, and cooling efficiency significantly improves, it might even be possible to reduce the quantity of air blower, on the other hand
After the sinter cloth of high temperature expects mixture charge level, the energy consumption of igniting and igniter quantity for the first time can be effectively reduced, is also given
Bed of material surface provides high temperature insulation layer, significantly improves the quality of surface sinter, and high temperature sinter cloth expects first
After secondary mix surface, play the role of dredging material and stent to second of cloth, improve entire after second of cloth is sintered
The gas permeability of the bed of material.
Description of the drawings
Fig. 1 is the present invention using the super thick bed of material sintering method process flow chart being pre-sintered；
Wherein 1 mixture distributor device a, 2 be igniter a, and 3 be bed of cloth for the first time, and 4 be mixture distributor device b, and 5 be igniting
Device b, 6 be second of bed of cloth, and 7 be sinter separator.
Specific embodiment
It is illustrated with reference to specific embodiment：
Concrete technology flow process such as Fig. 1 of the present invention, when being sintered production with belt type roasting machine, belt type roasting machine only has
A set of exhausting system by 1 cloth mixture of mixture distributor device, is then lighted a fire, in bed of cloth 3 for the first time by igniter 2
Mixture sintering 8-40min after, then cloth is carried out by mixture distributor device 4 and then is lighted a fire by igniter 5, lighted a fire
After continue to be sintered, at tail, bed of cloth 3 and second of bed of cloth 6 all complete sintering for the first time, and set tail sinter
Separator.Specific embodiment is as follows：
Embodiment 1：
When 360 square meter belt type roasting machines are sintered production, bed of material overall thickness is unloaded for 900mm in belt type roasting machine tail
Sinter separator is installed, the separator is tapered, and in monoblock trolley discharge process, sinter impinges upon cone at material
On shape separator, about 300mm is thick, the high temperature sinter of temperature >=700 DEG C and the sinter of residue 600mm thickness it is disconnected from each other go out
Come, after the small-sized crusher in crushing set respectively, the sinter that 700 DEG C of ＜ enters ring cold machine and cooled down, and isolates
High temperature sintering passes through the airtight transportation of heat preservation and distribution device cloth is expected on prefiring sinter mixture charge level for the first time, cloth
Thickness is in 280mm or so.
With technical indicator during conventional produce to such as table 1
Table 1 produces Comparative result
By the application of the present invention, sinter cooling efficiency significantly improves, and gas consumption in ignition reduces, sinter return fine rate drop
It is low.
Embodiment 2：
When 360 square meter belt type roasting machines are sintered production, bed of material overall thickness is unloaded for 950mm in belt type roasting machine tail
Sinter separator is installed, the separator is tapered, and in monoblock trolley discharge process, sinter impinges upon cone at material
On shape separator, about 300mm is thick, the high temperature sinter of temperature >=800 DEG C and the sinter of residue 650mm thickness it is disconnected from each other go out
Come, after the small-sized crusher in crushing set respectively, the sinter that 800 DEG C of ＜ enters ring cold machine and cooled down, and isolates
High temperature sintering passes through the airtight transportation of heat preservation and distribution device cloth is expected on prefiring sinter mixture charge level for the first time, cloth
Thickness is in 240mm or so.
With technical indicator during conventional produce to such as table 2
Table 2 produces Comparative result
By the application of the present invention, sinter cooling efficiency significantly improves, and gas consumption in ignition reduces, sinter return fine rate drop
It is low.
Embodiment 3：
When 360 square meter belt type roasting machines are sintered production, bed of material overall thickness is 1000mm in belt type roasting machine tail
Discharge pit is equipped with sinter separator, and the separator is tapered, and in monoblock trolley discharge process, sinter impinges upon
On taper separator, about 280mm is thick, and the sinter of the high temperature sinter and residue 720mm thickness of temperature >=1000 DEG C divides mutually
It separates out and, after the small-sized crusher in crushing set respectively, the sinter that 1000 DEG C of ＜ enters ring cold machine and cooled down, and detaches
The high temperature sintering gone out passes through the airtight transportation of heat preservation and distribution device cloth is expected on prefiring sinter mixture charge level for the first time,
Fabric thickness is in 260mm or so.
With technical indicator during conventional produce to such as table 3
Table 3 produces Comparative result
By the application of the present invention, sinter cooling efficiency significantly improves, and gas consumption in ignition reduces, sinter return fine rate drop
It is low.
Claims (3)
- It is 1. a kind of using the super thick bed of material sintering ignition method being pre-sintered, it is characterised in that：In pre-sintering process, roasted in belt Burning machine tail discharge pit sets sinter separator, and the high temperature sinter of temperature >=700 DEG C and remaining sinter are separated into Individual two parts, the 1/3 of the high temperature sinter thickness of feed layer of separation≤total thickness of feed layer, after crushing respectively, the burning that 700 DEG C of ＜ Knot ore deposit cloth is cooled down on ring type cooling air blower, high temperature sinter uniform distribution to prefiring sinter mixture for the first time On charge level, fabric thickness >=50mm；Ignition operation is carried out again.
- It is 2. according to claim 1 using the super thick bed of material sintering ignition method being pre-sintered, it is characterised in that：The height Warm sinter is being transported with whole process during cloth using heat preservation obturator.
- It is 3. according to claim 1 using the super thick bed of material sintering ignition method being pre-sintered, it is characterised in that：Described is pre- Sintering process is：First and second mixing distributing device and No. first and second igniter are configured on sintering belt type roasting machine； When once through mixing distributing device cloth sinter mixture, cloth layer thickness is burnt in 500mm-900mm, igniting sintering in advance for the first time After tying 8-40min, second of cloth sinter mixture is carried out in cloth layer surface for the first time, fabric thickness is in 100mm-650mm, sintering Suction pressure remains unchanged, and carries out igniting sintering to second of bed of cloth, when second of bed of cloth completes igniting, bed of cloth for the first time Mixture be sintered, the sum of cloth layer thickness and second cloth layer thickness >=900mm for the first time；Entire sintering process The middle sintering machine speed of service is 1.5m/min-2.5m/min, is sintered suction pressure >=7000pa, at rear of sintering machine, for the first time Bed of cloth and second of bed of cloth are complete sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815798.4A CN106337119B (en) | 2016-09-12 | 2016-09-12 | Sintering ignition method for ultra-thick material layer by adopting presintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815798.4A CN106337119B (en) | 2016-09-12 | 2016-09-12 | Sintering ignition method for ultra-thick material layer by adopting presintering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106337119A CN106337119A (en) | 2017-01-18 |
| CN106337119B true CN106337119B (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610815798.4A Active CN106337119B (en) | 2016-09-12 | 2016-09-12 | Sintering ignition method for ultra-thick material layer by adopting presintering |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086266A (en) * | 1992-08-20 | 1994-05-04 | 新日本制铁株式会社 | Sintering mine making method and manufacturing installation |
| CN101037720A (en) * | 2007-04-28 | 2007-09-19 | 中南大学 | Method for sintering iron ore powder with super high material layer |
| CN104726696A (en) * | 2015-04-17 | 2015-06-24 | 唐山瑞丰钢铁（集团）有限公司 | Medium-alkali thick blanking layer sintering and producing method |
-
2016
- 2016-09-12 CN CN201610815798.4A patent/CN106337119B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086266A (en) * | 1992-08-20 | 1994-05-04 | 新日本制铁株式会社 | Sintering mine making method and manufacturing installation |
| CN101037720A (en) * | 2007-04-28 | 2007-09-19 | 中南大学 | Method for sintering iron ore powder with super high material layer |
| CN104726696A (en) * | 2015-04-17 | 2015-06-24 | 唐山瑞丰钢铁（集团）有限公司 | Medium-alkali thick blanking layer sintering and producing method |
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| CN106337119A (en) | 2017-01-18 |
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