CN105200229B - It is a kind of to improve the method for sintered compound granulation - Google Patents
It is a kind of to improve the method for sintered compound granulation Download PDFInfo
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- CN105200229B CN105200229B CN201410256160.2A CN201410256160A CN105200229B CN 105200229 B CN105200229 B CN 105200229B CN 201410256160 A CN201410256160 A CN 201410256160A CN 105200229 B CN105200229 B CN 105200229B
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Abstract
The present invention discloses a kind of method of improvement sintered compound granulation, it will be sieved with the sinter return fine for being added to raw materials for sintering, it is divided into grade by granularity, add water wetting, is added separately to sintering primary mixer and second drum mixer, its grain size category is 0mm~1mm, 1~3mm, and 3~5mm, three granularity level, will with addition of sinter return fine rank for 0mm~1mm particle add water wetting after be added directly into sintering primary mixer in be stirred, mix；1mm~3mm and 3mm~5mm particle is added water and is added to after soaking in the secondary trommel mixer of sintering, pelletizing is carried out.The technical effects of the invention are that, reasonably control the amount of water of returning mine of each granularity level, the produce load of sintering primary mixer can be reduced, improve the production efficiency of second drum mixer, improve the reasonable granularity content of sinter mixture, so as to improve the gas permeability of sinter mixture, and then sintering machine production efficiency is improved, improve the yield and quality of sintering deposit.
Description
Technical field
The invention belongs to iron-smelting raw material production technical field, it is related to the production technology of sintering deposit, especially relates to one
Planting improves the method for sintered compound granulation.
Background technology
In sintering production, the mixed pelletization process of sintering is respectively mixed once and secondary mixing, passes through secondary mixing
Produce the small spherical particles of certain particle size rank.Rational grain graininess rank can significantly improve the final compound of sintering
Gas permeability, and then influence the yield and quality of sintering deposit, numerous researchs and it was verified that the pelletization of sintering is given birth to sintering
Production is most important.Proved by production practices, during sintering granulating, the granularity of bead is preferably kept in 3mm~8mm, small
Ball particle is in this grain size intervals, and sintering production can obtain best index, most beneficial to sintering process, can make sintered compound
Material possesses best gas permeability.In conventional sintering production, each enterprise will generally be incorporated the (granularity of returning mine that sintering production goes out
Rank is 0mm~5mm), to improve the granulating efficiency of sintered compound.
But in fact, this there is also many problems：(1) in sinter return fine, the granularity for serving as ball effect can really be played
Rank is 1mm~5mm, and the particle less than 1mm, which can not be played, improves the effect of granulation.High-temperature process has been received conversely, because returning mine,
Hydrophily is poor, and granularity is small, can not turn into ball less than 1mm particles part and be difficult to adsorb balling-up；(2) due to hydrophily of returning mine
Difference, such as without processing, the substantial amounts of moisture that can cause compound with addition of returning mine is fluctuated, and destroys the stability of mixture moisture,
Deteriorate production process；(3), because fine grained granularity level is high, returned mine in iron ore concentrate with addition of in higher sintering production in addition
Afterwards, some beads particle can be adsorbed around larger particle of returning mine, and by mixed once and secondary mixing, small spherical particles may
8mm can be far longer than, so as to deteriorate secondary processes of mixing and granulating, and coarse grained return mine in this part mixed once is added to
Afterwards, mixed once produce load can also be aggravated.
Document《The application of sinter return fine pre-wetting technique》Think, by using the wetting work that adds water in advance to sinter return fine
Skill, " core " effect that reinforcing is returned mine as compound pelletizing, not only reduces the fluctuation of mixed once material moisture, and improve
The balling-up speed and balling ratio of compound, improve permeability of sintering material bed, have good effect to improving sintering deposit quality
Really.Chinese patent CN200810302466 discloses a kind of iron ore concentrate sintered mix granulation that can improve Sintering Operation Index
Method is mainly using the granulation of secondary method of granulating, and in this patent, iron ore concentrate forms local height in advance pelletization
Basicity, promotes the generation of local calcium ferrite.Chinese patent CN98102028.3 is described in sintering production, and hot returning ore is two
Added during secondary mixing, therefore, secondary mixed mixture temperature can be improved, that is, save the energy, improve sinter quality, and
Sintering velocity is accelerated, and can improve Sintering Yield 10~15%.
The method that document above is introduced, is all that will simply return mine to be added directly into all with conventional method difference less
It is efficient to utilize in primary mixer, it is impossible to realize sinter return fine rationally.
The content of the invention
The present invention provides a kind of method of improvement sintered compound granulation, to the effect that will conventional disposable addition sintering one
The sinter return fine of secondary mixer, point granularity level and the wetting that reasonably adds water are added separately to sintering primary mixer and secondary mixed
Conjunction machine, improves the mixing granulation efficiency of sintering, and the gas permeability of sinter mixture is improved, the production of sintering production efficiency and sintering deposit
Quality is all improved.
To solve the above problems, the technical scheme is that：
It will be sieved with the sinter return fine for being added to raw materials for sintering, be divided into grade by granularity, reasonably add water wetting, is separately added into
To sintering primary mixer and second drum mixer；
1st, in raw materials for sintering, will with addition of sinter return fine sieve respectively as 0mm~1mm (＞ 0mm ,≤1mm), 1~
Three granularity level of 3mm (＞ 1mm ,≤3mm) and 3~5mm (＞ 3mm ,≤5mm).0mm~1mm particle is added water after wetting
It is added directly into sintering primary mixer and is stirred, mixes；1mm~3mm and 3mm~5mm particle is added water after wetting
It is added in the secondary trommel mixer of sintering, carries out pelletizing.
2nd, during sinter return fine adds water, the 0mm~1mm particle mode that adds water adds water for drop-wise, after adding water, in particle
Biodiversity percentage composition is controlled 6%~7%；1mm~3mm particle the mode that adds water adds water to be vaporific, after adding water, in particle
Biodiversity percentage composition is controlled 5%~6%；3mm~5mm particle the mode that adds water adds water to be vaporific, after adding water, in particle
Biodiversity percentage composition is controlled 4%~5%.
3rd, the particle of 1mm~3mm after soaking is added at the secondary trommel mixer feed(raw material)inlet of sintering, after wetting
3mm~5mm particle is added to the secondary trommel mixer of sintering along at the 1/2~2/3 of material moving direction mixer total length.
It will return mine and be added to primary mixer and second drum mixer point dividing for granularity level optimization, and reasonably control returning for each granularity level
Ore deposit amount of water, can reduce the produce load of sintering primary mixer, improve the production efficiency of second drum mixer, improve sintering mixed
The reasonable granularity content of material is closed, so as to improve the gas permeability of sinter mixture, and then sintering machine production efficiency is improved, improves sintering
The yield and quality of ore deposit.
Sinter return fine particle less than 1mm is difficult to turn into ball, and specific surface area is big, can directly add after the wetting of relatively large water
Enter primary mixer；1mm~3mm particle of returning mine is easily made into pelletizing core, reasonably controls its water content, is directly added into two
Secondary mixer, can reduce the produce load of primary mixer；If 3mm~5mm particle of returning mine does not control amount of water, and directly
Primary mixer and second drum mixer are added, can not only increase by a mixed produce load, and small spherical particles can be made drastically to grow up,
Grain may be much larger than rational granulation upper size boundary 8mm, so that deteriorating two is blended grain.
The technical effects of the invention are that, point the dividing for granularity level optimization that will return mine is added to primary mixer and secondary mixing
Machine, and the amount of water of returning mine of each granularity level is reasonably controlled, the produce load of sintering primary mixer can be reduced, two are improved
The production efficiency of secondary mixer, improves the reasonable granularity content of sinter mixture, so as to improve the gas permeability of sinter mixture, enters
And sintering machine production efficiency is improved, improve the yield and quality of sintering deposit.
Embodiment
Embodiment：
1st, sinter return fine is sieved, granularity is respectively, 0mm~1mm, 1~3mm and 3~5mm.
By the 0mm~1mm wetting that adds water of returning mine, moisture is controlled 7%, is added directly into primary mixer and is mixed；By 1
~3mm the wetting that adds water of returning mine, moisture is controlled 6%, is added directly at secondary trommel mixer feeding mouth；By 3~5mm's
Return mine the wetting that adds water, moisture is controlled 5%, be added directly into the secondary trommel mixer of sintering along material moving direction, mixer
At the 1/2 of total length.After screening twice pelletizing, the granularity of compound changes, and main contrast's result is：
| ＜ 1mm | 1~3mm | 3~5mm | 5~8mm | ＞ 8mm | |
| Conventional batch mixing | 7.47 | 16.51 | 39.16 | 29.18 | 7.68 |
| This method | 2.00 | 12.42 | 43.32 | 31.34 | 10.92 |
Screening of returning mine is carried out after batch mixing, and ＜ 1mm fine grained granularity level is obviously reduced, ＞ 3mm coarse granule particle size fraction
Not substantially do not increase, compound size distribution is more reasonable, can effectively improve the gas permeability of compound.
2nd, sinter return fine is sieved, granularity is respectively, 0mm~1mm, 1~3mm and 3~5mm.
By the 0mm~1mm wetting that adds water of returning mine, moisture is controlled 6%, is added directly into primary mixer and is mixed；By 1
~3mm the wetting that adds water of returning mine, moisture is controlled 5%, is added directly at secondary trommel mixer feeding mouth；By 3~5mm's
Return mine the wetting that adds water, moisture is controlled 4%, be added directly into the secondary trommel mixer of sintering along material moving direction, mixer
At the 2/3 of total length.After screening twice pelletizing, the granularity of compound changes, and main contrast's result is：
| ＜ 1mm | 1~3mm | 3~5mm | 5~8mm | ＞ 8mm | |
| Conventional batch mixing | 7.47 | 16.51 | 39.16 | 29.18 | 7.68 |
| This method | 4.33 | 14.51 | 41.72 | 29.64 | 9.80 |
Screening of returning mine is carried out after batch mixing, and ＜ 1mm fine grained granularity level reduces, and ＞ 3mm coarse granule granularity level increases
Plus, compound size distribution is more reasonable, can effectively improve the gas permeability of compound.
Claims (1)
1. a kind of improve the method for sintered compound granulation, it is characterised in that comprises the following steps：
1）It will be sieved with the sinter return fine for being added to raw materials for sintering, be divided into grade by granularity, its grain size category is ＞ 0mm ,≤1mm；
＞ 1mm ,≤3mm and ＞ tri- granularity level of 3mm ,≤5mm；
2）The sinter return fine for being divided into grade by granularity is added water wetting, wherein ＞ 0mm ,≤1mm particles the mode that adds water adds for drop-wise
Water, the control of biodiversity percentage composition is 6%~7% after adding water；＞ the 1mm ,≤3mm particles mode that adds water adds water to be vaporific, adds water
The control of biodiversity percentage composition is 5%~6% afterwards；＞ the 3mm ,≤5mm particles mode that adds water adds water to be vaporific, mass distributary after adding water
Percentage composition control is measured 4%~5%；
3）Will with addition of sinter return fine rank for ＞ 0mm ,≤1mm particle add water wetting after be added directly into sintering once mix
It is stirred, mixes in conjunction machine；＞ 1mm ,≤3mm and ＞ 3mm ,≤5mm particle are added water, and it is secondary to be added to sintering after soaking
In trommel mixer, pelletizing is carried out, wherein the particle of the ＞ 1mm ,≤3mm after wetting are added to the secondary trommel mixer original of sintering
Expect porch；The particle of ＞ 3mm ,≤5mm after wetting are added to the secondary trommel mixer of sintering and mixed along material moving direction
At the 1/2~2/3 of machine total length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410256160.2A CN105200229B (en) | 2014-06-11 | 2014-06-11 | It is a kind of to improve the method for sintered compound granulation |
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| CN201410256160.2A CN105200229B (en) | 2014-06-11 | 2014-06-11 | It is a kind of to improve the method for sintered compound granulation |
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| CN105200229A CN105200229A (en) | 2015-12-30 |
| CN105200229B true CN105200229B (en) | 2017-09-29 |
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| CN108857948A (en) * | 2017-05-15 | 2018-11-23 | 深圳市二砂深联有限公司 | A kind of mixing procedure of resin wheel |
| CN110004287B (en) * | 2018-01-04 | 2021-04-20 | 中冶长天国际工程有限责任公司 | Sintering method and sintering system of low-adhesion powdered iron material and using method of sintering system |
| CN108004392B (en) * | 2018-02-08 | 2024-02-23 | 山东钢铁股份有限公司 | Sintering equipment and process for reducing burning up of sintered solid |
| DE102019105417A1 (en) * | 2019-03-04 | 2020-09-10 | Tews Elektronik Gmbh & Co. Kg | Procedure for processing at least two input materials |
| CN111041195B (en) * | 2020-01-03 | 2021-01-29 | 中南大学 | Strong mixing-granulating method for strengthening sintering of high-proportion micro-fine particle raw materials |
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| JPS60121232A (en) * | 1983-12-06 | 1985-06-28 | Sumitomo Metal Ind Ltd | Pretreatment of starting material to be sintered |
| CN101649390A (en) * | 2009-09-15 | 2010-02-17 | 山西太钢不锈钢股份有限公司 | Method for ultra-fine refined flour sintering for large-scale sintering machine |
| CN102719659A (en) * | 2011-03-30 | 2012-10-10 | 宝山钢铁股份有限公司 | Sinter mixture granulating method |
| CN103757202B (en) * | 2014-01-30 | 2016-06-29 | 首钢总公司 | Part is returned mine without the sintering method participating in sintering of granulating |
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