CN108546821A - Sinter mixture humidification igniting sintering method - Google Patents
Sinter mixture humidification igniting sintering method Download PDFInfo
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- CN108546821A CN108546821A CN201810438863.5A CN201810438863A CN108546821A CN 108546821 A CN108546821 A CN 108546821A CN 201810438863 A CN201810438863 A CN 201810438863A CN 108546821 A CN108546821 A CN 108546821A
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The present invention relates to mineral aggregate sintering preparation method field, it is especially a kind of it is poor for hydrophily, wet volume capacity is small, absorb with hold the ability of moisture it is low, to sintering the more sensitive mineral aggregate of moisture and carry out sinter mixture humidification igniting sintering method, include the following steps：A, first, it is sintered machine mixture distributor, and charge level is smooth；B, it after charge level is smooth and before implementing mixture igniting, is uniformly humidified to sinter mixture charge level；C, igniting sintering is carried out.The present invention can make full use of moisture in sintering process heat transfer and with mixture lubrication with good improvement result principle, the heat transfer rate of ignition process is increased substantially, realization improves significantly to the Sintering Operation Index, sintered ore rotary drum strength and yield rate of sintering.That present invention is particularly suitable for hydrophilies is poor, wet volume capacity is small, it is low with the ability of moisture is held to absorb, to being sintered among the sintering of the more sensitive mineral aggregate of moisture.
Description
Technical field
The present invention relates to mineral aggregate sintering preparation method field, especially a kind of sinter mixture humidification igniting sintering method.
Background technology
Humidify the new technology that sintering is intensified-sintered.Wherein, moisture is that sintering process heat transfer is moistened with mixture
Sliding main media properly increases sinter mixture (particle surface) moisture, can accelerate heat transfer speed, improves vertical sintering
Speed, to improve Sintering Operation Index.Humidification sintering is by the way of being humidified after igniting at present.Using after firing to mine
Or mixtures thereof layer surface spray plus certain amount steam, water, the water vapour penetrated into the bed of material can strengthen the heat absorption energy of air significantly
Power, can improve heat exchange conditions and heat and mass effect, improve vertical sintering speed and fuel economy, Sintering Yield,
Intensity and yield rate improve a lot.But such sparking mode is in the small mineral aggregate of, wet volume capacity poor in face of hydrophily,
But ideal effect is cannot achieve, and there is not been reported for humidification sintering test research and production practices before lighting a fire.
Invention content
Technical problem to be solved by the invention is to provide one kind for hydrophily is poor, wet volume capacity is small, absorbs and water holding
Point ability it is low, to sintering the more sensitive mineral aggregate of moisture and carry out sinter mixture humidification igniting sintering method.
The technical solution adopted by the present invention to solve the technical problems is：Sinter mixture humidification igniting sintering method, packet
Include following steps：A, first, it is sintered machine mixture distributor, and charge level is smooth；B, after charge level is smooth and mixed in implementation
Before closing shots fire, uniformly it is humidified to sinter mixture charge level；C, igniting sintering is carried out.
Further, the humidification in step b is completed by the humidification water pipe being installed on sinter mixture charge level.
Further, the humidification water pipe is set between sinter mixture charge level and sintering machine platform.
Further, distance range of the water inlet apart from sinter mixture charge level of the humidification water pipe be 100 ±
30mm。
Further, the water inlet diameter range of humidification water pipe is φ 1-3mm.
Further, pitch of holes ranging from 120 ± 20mm of the water inlet of humidification water pipe.
Further, the amount of water of the humidification is the 0.08%~0.16% of sinter mixture water requirement.
The beneficial effects of the invention are as follows：In actual use, mixture of sintering machine is subjected to cloth operation first, to allow
Material is uniformly set on equipment, is exactly core of the invention key point then：After charge level is smooth and implementing to mix
Before shots fire, it is humidified to sinter mixture charge level, is sintered again later.Such mode can make full use of moisture
To in sintering process heat transfer and with mixture lubrication with good improvement result principle, increase substantially and lighted a fire
The heat transfer rate of journey, realization improve significantly to the Sintering Operation Index, sintered ore rotary drum strength and yield rate of sintering.
That present invention is particularly suitable for hydrophilies is poor, wet volume capacity is small, it is low with the ability of moisture is held to absorb, to being sintered the more sensitive mine of moisture
Among the sintering of material.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the schematic diagram of the cross water spray sintering structure of the present invention.
In figure label for：Sintering machine platform 1, cross water spray line horizontal line 2, cross water spray line ordinate 3, humidification water pipe 4,
Water inlet 41, sintered cup 5, sinter mixture charge level 6, sintering pallet 7.
Specific implementation mode
The present invention further illustrates with reference to the accompanying drawings and examples.
Sinter mixture humidification igniting sintering method as shown in Figure 1, includes the following steps：A, first, it is sintered machine
Mixture distributor, and charge level is smooth；B, after charge level is smooth and before implementing mixture igniting, to sinter mixture charge level
Uniformly it is humidified；C, igniting sintering is carried out.Core of the invention key is exactly after charge level is smooth and to implement to mix shots
Before fire, it is humidified to sinter mixture charge level, is sintered again later.Such mode can make full use of moisture to burning
Heat transfer during knot and with principle of the mixture lubrication with good improvement result, increase substantially ignition process
Heat transfer rate, realization improve significantly to the Sintering Operation Index, sintered ore rotary drum strength and yield rate of sintering.
In general, the uniform humidification in step b is completed by cross water injector, wherein as shown in Fig. 2, cross
Water injector is made of cross water spray line horizontal line 2, cross water spray line ordinate 3 and sintered cup 5, to ensure sprinkling humidification
It is uniform.
In order to realize humidification operations that are controllable, stablizing, can select to make the humidification in step b mixed by being installed on sintering
The humidification water pipe 4 closed on material charge level 6 is completed.As shown in Figure 1, humidification water pipe 4 can play the role of water storage, to need to increase
Humidification operations are realized when wet at the first time.In actual design, preferably the humidification water pipe 4 is set to sinter mixture charge level 6
Between sintering machine platform 1.In order to realize best moisturization effect, such scheme can be selected：The humidification water pipe 4 adds
Distance range of the water hole 41 apart from sinter mixture charge level 6 is 100 ± 30mm.As a preferred option, be preferably humidified water pipe 4
41 diameter range of water inlet is φ 1-3mm；Pitch of holes ranging from 120 ± 20mm of the water inlet 41 of humidification water pipe 4；The humidification
Amount of water be sinter mixture water requirement 0.08%~0.16%.
Embodiment
1, implementation condition
Implement crude fuel ferric charge used and is configured to iron charge 1 (vanadium ilmenite concentrate)+iron charge 2 (the high powder of state) (low iron of+iron charge 3
Material).
Test raw material：Iron charge 1, iron charge 2, iron charge 3, lime stone, quick lime, coke powder.
The physicochemical property of raw material is shown in Table 1~3.
The experiment of table 1 crude fuel main chemical compositions/%
The granularmetric composition of 2 experiment crude fuel of table
Granularmetric composition/% of 3 iron ore concentrate of table
2, setting and method
2.1, entire charge level is sprayed water entirely
In order to investigate before cloth complete shots fire water-spraying amount (mixture ball surface water or surface wet volume capacity) to being sintered index
Influence, carried out the sintering that entire charge level is sprayed water entirely.
Empirically scheme, using orthogonal design, experimental level：
(1) mixture humidification moisture content (%)：0.5,1.0,1.5,0.08,0.16；
(2) sintering fuel proportioning and mixture fixed carbon (%)：5.1(3.041),4.95(2.957),4.8(2.873)；
(3) sinter bed (mm):650,700,750.
Before formal test, first in height sintering fuel ratio (mixture fixed carbon 5.1%), the high bed of material (750mm) item
Under part, the exploitative experiment of water-spraying amount from high to low is carried out, to investigate the feasibility of the preceding spray water sintering of igniting and to fit
Suitable water-spraying amount range.
2.2, charge level locally sprays water and (is interrupted water spray on simulation sintering machine)
(it is interrupted spray mode in such a way that sintering charge level is locally sprayed water before the complete shots fire of cloth on simulation sintering machine, adopts
With cross water spray, cross line width 5-8mm or so runs through entire charge level, sintered cup charge level is divided into 4 equal sectors),
Its schematic diagram is shown in Fig. 2.In order to accurately control the width of water spray cross hairs, sprayed using the water jet of laboratory pelletizing pelletizing
Water.
According to live mixture moisture situation, local water spray is in accounting for 0.08%, the 0.16% of mixture moisture ratio
Mode is sprayed water.
2.3, test method
(1) quick lime is fully digested with active ash plus suitable quantity of water, and batch and then is added in the quick lime digested,
And supplement plus (nature) water to moisture is required, through mechanical mixing 4-6min, then feed to trommel mixer (Φ 600 ×
1200mm, rotating speed 16.77rpm) in pelletize 5min, then charging sintering.
(2) sintering test carries out in Φ 300 × 800mm sintered cups, and igniting negative pressure is 600 × 9.8Pa, is sintered negative pressure
1200 × 9.8Pa, duration of ignition 2min.Fixed thickness of feed layer 650mm, sintered cup shop fixtures material granularity 10-16mm, grate-layer material thickness
20mm has recorded charge.
(3) experiment mixture moisture is carried out by 7.3 ± 0.2% controls, dosage of coke by testing program, proportioning of returning mine
55.0% (accounting for virgin material ratio) uses one glass of finished product and sifts out the sinter return fine returned mine as next glass, or take new 2# to scene
Machine is self-produced to return mine as unified dispensing, and since test period is long, returning mine properly to preserve.
(4) it is sintered intermediary operation reference record：Negative pressure, temperature, sintering end point time, record is primary within every 2 minutes.
(5) it is poured out after sinter is burned, cooling, sieve classification.
3, experimental result and analysis
3.1, entire charge level is sprayed water entirely
Entire charge level experimental result of spraying water entirely is shown in Table 4,5, therefrom visible：
(1) water-spraying amount has a significant impact to Sintering Operation Index tool before the complete shots fire of cloth.As water-spraying amount ＞ 0.6%
When, surface mixture overly moist starts to be in solvent or diluent shape, it is difficult to light.The reason is that fuel is first heated to ignition temperature by sintering ignition,
Then heat is provided to material layer lower part again, promotes combustion zone to move down in the case where being sintered suction function, completes entire sintering process.Work as material
When face water-spraying amount is excessive, fuel overly moist, when igniting, need to spend the more time could be ignited fuel, and extend the duration of ignition then
Surface can one layer of fine and close shell of knot, cause bed permeability to decline.Therefore, when charge level water-spraying amount is excessive, one side fuel
It is nonflammable, or burning is bad, on the other hand due to surface mixture overly moist, sintering gas permeability declines larger, heat transfer rate pole
Slowly, combustion zone cannot be moved down normally, be eventually led to flame-out.Although having lighted fire when water-spraying amount 0.9%, due to mixture mistake
Wet, surface ignition quality and fuel combustion efficiency are poor, and material layer temperature is low (only 418 DEG C of highest sintered discharge gas temperature), heat transfer rate
Slowly, cause the indexs such as sintering velocity, sinter strength, yield rate, usage factor very poor.
(2) when water-spraying amount is reduced to 0.2%, surface mixture is only slightly wetter than regular burden(ing), energy smooth ignition and sintering,
And sintering velocity is very fast, but the indexs such as sinter strength, yield rate, usage factor, sinter granularmetric composition are below benchmark.It is former
Although because being that water-spraying amount is relatively low, due to that cannot accomplish spray water substantially uniformity, the few mixture of water is first lighted when igniting,
Part after-burning more than water, charge level are in " paint face " shape, and ignition quality compares reference difference.Meanwhile it is although wetter than benchmark bigger at this time
Degree has wet mixture particle, improves surface smooth degree, while the vapor that is formed of moisture is mixed into exhaust gas, the coefficient of conductivity with
Heat transfer coefficient improves, and actually reduces exhausting resistance, accelerates sintering velocity, but sintering velocity is accelerated, and bed of material high temperature is caused
Retention time and crystallizable mineral time shorten, and moisture evaporation needs consumption of calorie, in the case of constant with carbon, necessarily causes
Sintering temperature declines, and therefore, compared with benchmark, sinter strength and decrease in yield, big grade (＞ 5mm) sintering mineral content subtract
Few, ＜ 5mm amount of powder increases, and sinter granularmetric composition is deteriorated.
4 entire charge level of table humidification sintering test result
Granularmetric composition/% of 5 sinter of table
3.2 charge level is locally sprayed water
Locally water spray experimental result is shown in Table 6,7 to charge level, therefrom visible：
(1) compared with the benchmark that do not spray water, when water-spraying amount 0.08%, sintering velocity is basically unchanged, sinter rotary drum
Intensity improves 0.11%, and yield rate improves 0.48%, and usage factor improves 0.004t/m2.h；When water-spraying amount is increased to
When 0.16%, drum strength improves 0.14%, and yield rate improves 0.43%, and usage factor improves 0.003t/m2.h, but sintering is fast
Degree is declined slightly and (declines 0.07mm/min).
(2) compared with benchmark, when water-spraying amount 0.08%, 0.16%, sinter ＞ 40mm grain size contents increase separately
1.19%, 0.97%, 40-25mm grain size contents increase separately 1.12%, 1.40%, ＜ 5mm content of powder decline 1.88%,
1.76%, sinter granularmetric composition improves.
(3) test result shows using locally water spray (cross water spray) is sintered mineral products matter to improving before the complete shots fire of cloth
Amount has certain effect, especially sintered ore rotary drum strength and yield rate to improve.Compared with water-spraying amount 0.08%, water-spraying amount
0.16% sintering velocity is declined slightly, and the amplitude that yield rate improves also decreases.Therefore, water spray nor it is more more more
It is good, but have a suitable range.
Locally water spray (cross water spray) improves the mechanism of sinter quality, mainly cross water spray before the complete shots fire of cloth
Afterwards, it sprays water on line since moisture is larger, ignition results are poor when igniting, and fuel herein is difficult to burn or combustion efficiency is poor,
It is difficult to generate molten condition, sinter consolidation is weaker, therefore generates artificial crack here, and concentration releases upper layer sinter
Thermal stress makes the stress inside sinter greatly reduce, and eliminates the aging crack for spreading all over sinter, improves sinter strength, subtracts
Sinter is lacked and has generated more muck in shattering process, to improve the yield rate and yield and quality of sinter.
6 cross humidification sintering test result of table
Granularmetric composition/% of 7 sinter of table
4, conclusion
(1) poor for hydrophily, wet volume capacity is small, and absorption is low with the ability of moisture is held, to being sintered the more sensitive mine of moisture
Material, using the method for full-charge-level spray water before igniting, when water-spraying amount ＞ 0.6%, surface mixture overly moist, it is difficult to light；Spray
When watering amount is reduced to 0.2%, can smooth ignition and sintering, sintering velocity faster than benchmark, but due to that cannot accomplish spray water
Substantially uniformity, ignition quality is than reference difference, and material layer temperature declines, and high temperature hold time and crystallizable mineral time shorten, with base
Standard is compared, sinter strength and decrease in yield, and ＜ 5mm amount of powder increases, and granularmetric composition is deteriorated.All in all, using igniting
The preceding full spray water method of charge level climbs concentrate to high titania type and is sintered no invigoration effect, adversely affects instead.
(2) before igniting by the way of being sintered the cross water spray of charge level, there is certain effect to improving Sintering Operation Index
Fruit, sintering velocity variation is little, and sintered ore rotary drum strength and yield rate improve.Compared with the benchmark that do not spray water, work as water-spraying amount
0.08%, 0.16% when, sintered ore rotary drum strength is respectively increased 0.11%, 0.14%, yield rate is respectively increased 0.48%,
0.43%, 0.004t/m is respectively increased in usage factor2.h、0.003t/m2.h。
(3) when the cross water spray of charge level, compared with water-spraying amount 0.08%, the sintering velocity of water-spraying amount 0.16% slightly has
Decline, the amplitude that yield rate improves also decreases.Therefore, water spray is nor The more the better, but has a suitable range.
(4) laboratory test shows using in the complete preceding (sintering machine by the way of being sintered the cross water spray of charge level of shots fire of cloth
It is upper to spray water for interruption), there is certain effect to improving sintered ore rotary drum strength and yield rate really, before sintering production is using igniting
It is feasibility to be interrupted water-jet technology.
Claims (8)
1. sinter mixture humidification igniting sintering method, which is characterized in that include the following steps：
A, first, it is sintered machine mixture distributor, and charge level is smooth；
B, it after charge level is smooth and before implementing mixture igniting, is uniformly humidified to sinter mixture charge level；
C, igniting sintering is carried out.
2. sinter mixture humidification igniting sintering method as described in claim 1, it is characterised in that：Uniform increasing in step b
The wet humidification water pipe (4) by being installed on sinter mixture charge level (6) is completed.
3. sinter mixture humidification igniting sintering method as claimed in claim 2, it is characterised in that：The humidification water pipe (4)
It is set between sinter mixture charge level (6) and sintering machine platform (1).
4. sinter mixture humidification igniting sintering method as claimed in claim 2, it is characterised in that：The humidification water pipe (4)
Distance range of the water inlet (41) apart from sinter mixture charge level (6) be 100 ± 30mm.
5. sinter mixture humidification igniting sintering method as claimed in claim 4, it is characterised in that：Humidification water pipe (4) adds
Water hole (41) diameter range is φ 1-3mm.
6. sinter mixture humidification igniting sintering method as claimed in claim 4, it is characterised in that：Humidification water pipe (4) adds
The pitch of holes ranging from 120 ± 20mm in water hole (41).
7. sinter mixture humidification igniting sintering method as described in claim 1, it is characterised in that：The amount of water of the humidification
It is the 0.08%~0.16% of sinter mixture water requirement.
8. sinter mixture humidification igniting sintering method as described in claim 1, it is characterised in that：Uniform increasing in step b
It is wet to be completed by cross water injector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113166842A (en) * | 2018-12-07 | 2021-07-23 | 杰富意钢铁株式会社 | Method for producing sintered ore |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN203333727U (en) * | 2013-06-19 | 2013-12-11 | 攀钢集团攀枝花钢钒有限公司 | Water spraying device before ignition of sintering material surface |
| CN107502736A (en) * | 2017-08-22 | 2017-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of sinter mixture and its sintering method of Baima iron ore concentrate |
-
2018
- 2018-05-09 CN CN201810438863.5A patent/CN108546821A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN203333727U (en) * | 2013-06-19 | 2013-12-11 | 攀钢集团攀枝花钢钒有限公司 | Water spraying device before ignition of sintering material surface |
| CN107502736A (en) * | 2017-08-22 | 2017-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of sinter mixture and its sintering method of Baima iron ore concentrate |
Non-Patent Citations (1)
| Title |
|---|
| 王悦祥: "《烧结矿与球团矿生产》", 31 July 2006, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113166842A (en) * | 2018-12-07 | 2021-07-23 | 杰富意钢铁株式会社 | Method for producing sintered ore |
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