CN1286994C - Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter - Google Patents
Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter Download PDFInfo
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- CN1286994C CN1286994C CN 200310112979 CN200310112979A CN1286994C CN 1286994 C CN1286994 C CN 1286994C CN 200310112979 CN200310112979 CN 200310112979 CN 200310112979 A CN200310112979 A CN 200310112979A CN 1286994 C CN1286994 C CN 1286994C
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Abstract
The present invention relates to a particle shaping process of a sintering ore, which belongs to the technical field of metallurgical sintering. The sintering ore is transported to a particle shaping system composed of two sieves for particle shaping and sieving after being cooled by a cooling machine; the sizes of the sieve pores of the two sieves are respectively 5 to 6mm and 8 to 10mm, and the sintering ore with the particle size more than or equal to 5mm, and less than 10mm after the particle shaping is used as a bedding material, transported to a sintering machine by a transporter and distributed; particles whose particle size is less than 5 or 6mm are used as return fines and proportioned, and the sintering ore with the particle size more than or equal to 8 or 10mm is used as a finished product, and transported to a blast furnace; the sintering ore with the particle size more than or equal to 5mm, and less than 10mm is used as a bedding layer, and the redundant sintering ore is still used as the finished product, and transported to the blast furnace. Compared with the prior art, the present invention has the advantages of little damage of the sintering ore, homogenized particle size of the bedding material, little deflecting gap of layers of the bedding material and a sintered material, little construction investment and small occupation area.
Description
Technical field
The present invention relates to the whole grain of the whole grain of a kind of agglomerate technology, particularly agglomerate less breakage granule smaller grain and narrower deflection gap bed material technology, belong to metallurgy sintered technical field.
Background technology
For the protection chassis with guarantee that the bed of material grills thoroughly, large-type sinterer all at the thick agglomerate of sintering pallet upper berth 20mm～40mm as grate-layer material, in grate-layer material, be covered with the compound sintering of lighting a fire.In conventional design, the agglomerate dying grain system is provided with tertiary screen and tells and return mine and grate-layer material, usually with the agglomerate of 10mm～20mm grade of separating from tertiary screen as grate-layer material.There are following three big defectives in this whole grain of the agglomerate grate-layer material technology that just can reach the purpose of whole grain as auxilliary bed material, through three screenings with 10mm～20mm grade sintering:
1, agglomerate is damaged too many in the whole grain process.The screening number of times of agglomerate and between each sieve to have bad luck number of times many more, agglomerate is damaged and pulverize manyly more, causes that the rate of return mine raises, yield rate reduces, production practice show that the every screening of agglomerate once increases by about 2% powder, and whenever having bad luck once increases by about 1% powder.
2, grate-layer material granularity is improper.Concerning blast furnace ironmaking, the physical and chemical performance of 10mm～20mm grade agglomerate is good, and helping blast furnace increases pig iron output and lower coke consumption, uses the high-quality agglomerate of this grade to make auxilliary bed material, waste sintering resource; Concerning SINTERING PRODUCTION, it also is disadvantageous that the agglomerate of use 10mm～20mm grade is done grate-layer material, because sinter machine adopts segregation distribution, in the sinter mixture content generally the material of the 5mm about 45%～8mm grade by cloth to the lower floor of compound, above the grate-layer material.The compound of 5mm～8mm and 10mm～20mm coarse grain grate-layer material particle diameter difference is up to four times, the crack is too big partially, the small grain size compound is filled the air gap of volume particle size grate-layer material, make the permeability index variation of sinter bed, influenced passing through of waste gas, thereby influenced the raising of total bed thickness, caused agglomerate to yield poorly, the solid fuel consumption height.
3, whole grain complex process, equipment is many, makes the construction investment height, and floor space is big.The processing unit configuration is complicated, makes equipment failure point increase, and spare parts consumption increases, and causes a ton ore deposit cost to raise, and directly has influence on the raising of economic benefit.
Summary of the invention
The objective of the invention is provides a kind of regrading at the defective in the existing technology, and agglomerate is damaged few; The homogenize of grate-layer material granularity, the whole grain of the agglomerate less breakage granule smaller grain and narrower deflection gap bed material technology of dwindling the inclined to one side crack of grate-layer material and sinter bed.
The objective of the invention is to be achieved through the following technical solutions:
Agglomerate is after the cooler cooling, transport to the dying grain system that becomes by the twice screen banks by conveyor and carry out whole grain screening, the sieve aperture of twice sieve is respectively 5mm～6mm and 8mm～10mm, behind whole grain more than or equal to 5mm and less than the agglomerate of 10mm grade as grate-layer material, transport to sinter machine with conveyor and carry out cloth.Participate in batching as returning mine less than the particle of 5mm or 6mm, be sent to blast furnace as finished product more than or equal to the agglomerate of 8mm or 10mm.This more than or equal to 5mm and the same with 10mm～20mm grade less than the grate-layer material amount of 10mm grade, general also all greater than the needs of sinter machine grate-layer material, except that being used as grate-layer material, redundance still is sent to blast furnace as finished product.
The whole grain of agglomerate less breakage granule smaller grain and narrower deflection gap bed material of the present invention technology is compared with the whole grain of the big crack grate-layer material partially of the big grain of the 10mm～20mm technology in the existing technology, has following positively effect:
1, use is done grate-layer material greater than 5mm and less than the granule level agglomerate of 10mm, has significantly reduced the content of going into the medium and small grade agglomerate of stove agglomerate and has contained the powder rate, helps reinforcing blast furnace smelting and blast furnace volume increase consumption reduction.
2, screening number of times and transfer number of times reduces, and undermines and has bad luck the amount of powder of beating breakage and causing and increase thereby reduced screen separator mill, generally can reduce about 40%, thereby increased the output of finished product agglomerate.
3, use is done grate-layer material greater than 5mm and less than the granule level agglomerate of 10mm, the epigranular of grate-layer material, the grade difference of grate-layer material and compound reduces greatly, inclined to one side crack between the particle further dwindles, thereby effectively improved the porosity of sinter bed bottom, improved the ventilation property of the bed of material, created condition for increasing agglomerate output and cutting down the consumption of energy.
4, can save a sieve compartment at least, work simplification, floor space reduces, and capital cost can reduce more than 1/3rd.
5, because processing unit reduces, and failure rate reduces, and helps improving the sinter machine operating rate, the volume increase of acceleration of sintering machine; Simultaneously, the operating post personnel reduce, and the production run expense also reduces greatly.
Description of drawings
Fig. 1 is that twice of the present invention are sieved feeding in the horizontal direction and flowed direct configured in series process flow sheet;
Fig. 2 is that configuration is opened in the twice screening of invention, at the process flow sheet of vertical direction configured in series.
Among the figure: 1-one sieve, 2-two sieves, the 3-adhesive tape conveyor, the cold ore deposit of a-, b-returns mine, c-grate-layer material, d-finished product.
Embodiment
Describe the present invention below in conjunction with accompanying drawing:
Agglomerate is after the cooler cooling, transport to the dying grain system that becomes by the twice screen banks by conveyor and carry out whole grain screening, sieve 1 sieve aperture in the twice sieve is 5mm～6mm, two sieves, 2 sieve apertures are 8mm～10mm, twice are sieved 2 feedings in the horizontal direction of 1 and two sieves and are flowed direct configured in series, cooled agglomerate is through a sieve 1 screening, and undersized agglomerate particle less than a sieve 1 sieve aperture is participated in batching again as returning mine; On the sieve 〉=one the sieve 1 sieve aperture agglomerate directly enter two the sieve 2; Through two the sieve 2 the screening, on the sieve 〉=two the sieve 2 sieve apertures big grade agglomerate be sent to blast furnace as the finished product ore deposit; Sieve 〉=one sieve 1 sieve aperture to the granule level agglomerate less than two sieves, 2 sieve apertures down transports sinter machine to as grate-layer material, is taped against on the bogie grates; A described 〉=sieve 1 sieve aperture to less than the granule level agglomerate amounts of two sieves, 2 sieve apertures if greater than the grate-layer material requirement, redundance can be used as finished product and is sent to blast furnace.
In addition, but the twice of described agglomerate dying grain system are sieved 1 and two sieves, 2 separate configuration, as twice sieves vertical direction configured in series, between two sieves adhesive tape conveyor 3 hauls are set, the materials flow of two sieves 2 can with the materials flow of a sieve 1 in the same way, vertical or reverse.Two sieves, 2 sieve apertures in the twice sieve are 8mm～10mm, one sieve, 1 sieve aperture is 5mm～6mm, cooling back agglomerate is through 2 screenings of two sieves, on the sieve 〉=two the sieve 2 sieve apertures big grade agglomerate be sent to blast furnace as the finished product ore deposit, sieve is delivered to a sieve 1 less than the agglomerate of two sieves, 2 sieve apertures by adhesive tape conveyor 3 down, through a sieve 1 screening, undersized agglomerate particle less than a sieve 1 sieve aperture is participated in batching again as returning mine, on the sieve 〉=and two sieves, 2 sieve apertures are to transporting to sinter machine as grate-layer material and carry out cloth less than the agglomerate of a sieve 1 sieve aperture, and redundance also is sent to blast furnace as finished product.
Embodiment 1
As shown in Figure 1, the twice of agglomerate dying grain system are sieved feeding in the horizontal direction and are flowed direct configured in series, and a sieve 1 sieve aperture is 5mm, and two sieves, 2 sieve apertures are 10mm.Cooled agglomerate is through a sieve 1 screening, and undersized particle is participated in batching again as returning mine; On the sieve 〉=agglomerate of 5mm directly enters two sieves 2; Through 2 screenings of two sieves, on the sieve 〉=the big grade agglomerate of 10mm is sent to blast furnace as the finished product ore deposit; Sieve following 〉=5mm and extremely transport sinter machine to as grate-layer material, be taped against on the bogie grates less than the granule level agglomerate of 10mm.Generally all greater than the grate-layer material requirement, redundance still is sent to blast furnace as finished product to the agglomerate amount of this grade.
Embodiment 2
As shown in Figure 2, two sieves, 2 sieve apertures are 10mm, and a sieve 1 sieve aperture is 5mm, and configuration is opened in twice screenings, and twice sieve vertical direction configured in series is provided with adhesive tape conveyor 3 hauls between two sieves, the materials flow of two sieves 2 can with the materials flow of a sieve 1 in the same way, vertical or reverse.Cooling back agglomerate is through 2 screenings of two sieves, on the sieve 〉=the big grade agglomerate of 10mm transports blast furnace to as the finished product ore deposit, sieve is delivered to a sieve 1 less than the part of 10mm by adhesive tape conveyor down, through a sieve 1 screening, undersized particle is participated in batching again as returning mine, on the sieve 〉=and extremely transport to sinter machine less than the agglomerate of 10mm as grate-layer material carries out cloth to 5mm, and redundance also is sent to blast furnace as finished product.
To enter the powder of finished product and further dwindle the inhomogeneous inclined to one side crack that produces of grate-layer material granularity in order to reduce as far as possible, can suitably dwindle the size range of grate-layer material according to the production practical situation.As the lower limit of grate-layer material granularity is defined as 6mm, when dwindling the inclined to one side crack of granularity, improved screening efficiency to returning mine, that reduces the finished product agglomerate contains the powder rate, favourable to blast furnace ironmaking.Also the grate-layer material granularity upper limit can be defined as 9mm, the grate-layer material granularity is tending towards evenly, dwindle the inclined to one side crack of grate-layer material.Also can simultaneously grate-layer material granularity upper and lower limit be decided to be respectively＞6mm and＜9mm, even littler granular space.Contain under the situation of powder rate in reduction finished product ore deposit, make the grate-layer material granularity more even, further dwindle the inclined to one side crack of grate-layer material itself.The difference of the big grade of grate-layer material and sinter mixture also further reduces, and the crack dwindles partially, and the bed permeability of sintering pallet is further improved.The grate-layer material granularity lower limit of two kinds of schemes preferably is decided to be＞6mm, the granularity upper limit＜8mm, and the granularity upper limit and interval should reduce as far as possible.Particular case is decided according to the size composition of raw material mix and agglomerate.Its best effect is, contains the powder rate and dwindle the grate-layer material particle diameter to greatest extent poor reducing the finished product agglomerate, and dwindles under the prerequisite in inclined to one side crack, and particulate grate-layer material and actual requirement that dying grain system is told reach balance.Do not have unnecessary grate-layer material, just do not need through threeway hopper sub-material and the feeding of the past finished product system of increase equipment, thereby further simplify technology, reduce construction investment.
Two kinds of screening dying grain system distributing styles respectively have relative merits.Sift out earlier among the embodiment 1 and tell the grate-layer material process program after returning mine, its advantage is: one is that two vibratory screening apparatuss can directly join, and is arranged in the factory building, has simplified production technique and environmental dust removal technology, has reduced floor space, thereby has saved construction investment; Two is that two sieves are forward arranged, a sieve 1 screen overflow can directly be given on two sieves 2, has both reduced the adhesive tape conveyor 3 between two sieves, is convenient to overhaul of the equipments and maintenance again; The 3rd, reduce by an operating post, per tour can reduce by an operator; The 4th, reduce the finished product ore deposit of once having bad luck and beaten the breakage that causes, favourable to improving yield rate.Its shortcoming is: under the situation that a sieve 1 adopts less than 6mm to 5mm sieve aperture, the powder that produces in two sieves, 2 screening processes enters grate-layer material, and wherein redundance enters in the finished product agglomerate, and reduction finished product agglomerate is contained the powder rate minimal effect.If the grate-layer material granularity is selected suitable, grate-layer material and actual needs that whole grain comes out balance each other, and just do not have the superfluous problem of grate-layer material.Sieve out after among the embodiment 2 and return mine and grate-layer material technology, avoided the shortcoming of Fig. 1 scheme, but overhaul of the equipments and maintenance for convenience, two sieve compartments or two superimposed configuration up and down need be set, adhesive tape conveyor 3 of polygamy between the twice sieve, it is also influential slightly to the yield rate of agglomerate that agglomerate is had bad luck the breakage of beating.
Claims (4)
1, the whole grain method of a kind of agglomerate less breakage granule smaller grain and narrower deflection gap bed material, it is characterized in that agglomerate is after the cooler cooling, transport to by conveyor and to sieve (1) and two dying grain systems formed of sieve (2) by twice and carry out whole grain and sieve, the sieve aperture of twice sieve is respectively 5mm～6mm and 8mm～10mm, behind whole grain 〉=5mm and less than the agglomerate of 10mm grade as grate-layer material, transport to sinter machine and carry out cloth.
2, the whole grain method of agglomerate less breakage granule smaller grain and narrower deflection gap bed material as claimed in claim 1, it is characterized in that agglomerate is after the cooler cooling, transport to the dying grain system that becomes by the twice screen banks by conveyor and carry out whole grain screening, sieve (1) sieve aperture in the twice sieve is 5mm～6mm, two sieve (2) sieve apertures are 8mm～10mm, twice sieve (1) and direct configured in series is flowed in two sieve (2) feedings in the horizontal direction, cooled agglomerate is through sieve (a 1) screening, and undersized agglomerate particle less than sieve (a 1) sieve aperture is participated in batching again as returning mine; On the sieve 〉=one the sieve (1) sieve aperture agglomerate directly enter two the sieve (2); Through two the sieve (2) screening, on the sieve 〉=two the sieve (2) sieve apertures big grade agglomerate be sent to blast furnace as the finished product ore deposit; Sieve 〉=one sieve (1) sieve aperture to the granule level agglomerate less than two sieve (2) sieve apertures down transports sinter machine to as grate-layer material, is taped against on the bogie grates.
3, the whole grain method of agglomerate less breakage granule smaller grain and narrower deflection gap bed material as claimed in claim 1, the twice that it is characterized in that described agglomerate dying grain system are sieved (1) and two sieve (2) separate configuration, between two sieves adhesive tape conveyor (3) haul is set, twice sieve vertical direction configured in series, sieve (1) sieve aperture in the twice sieve is 5mm～6mm, two sieve (2) sieve apertures are 8mm～10mm, cooling back agglomerate is through two sieve (2) screenings, on the sieve 〉=two the sieve (2) sieve apertures big grade agglomerate be sent to blast furnace as the finished product ore deposit, sieve is delivered to a sieve (1) less than the agglomerate of two sieve (2) sieve apertures by adhesive tape conveyor (3) down, through sieve (a 1) screening, sieve is participated in batching less than the agglomerate particle of sieve (a 1) sieve aperture as returning mine down again, on the sieve 〉=and sieve (a 1) sieve aperture is to transporting to sinter machine as grate-layer material and carry out cloth less than the agglomerate of two sieve (2) sieve apertures, and redundance also is sent to blast furnace as finished product.
4, the whole grain method of agglomerate less breakage granule smaller grain and narrower deflection gap bed material as claimed in claim 2 is characterized in that sieve (1) sieve aperture in the twice sieve of dying grain system is 6mm, and two sieve (2) sieve apertures are 8mm, and behind whole grain, the grate-layer material granularity is 6mm～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112979 CN1286994C (en) | 2003-12-29 | 2003-12-29 | Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112979 CN1286994C (en) | 2003-12-29 | 2003-12-29 | Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter |
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| CN1635167A CN1635167A (en) | 2005-07-06 |
| CN1286994C true CN1286994C (en) | 2006-11-29 |
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| CN 200310112979 Expired - Fee Related CN1286994C (en) | 2003-12-29 | 2003-12-29 | Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492767B (en) * | 2008-01-23 | 2010-12-08 | 四川龙蟒矿冶有限责任公司 | Multi-stage whole-granule processing method and equipment for direct reduction of greenball |
| CN102978313A (en) * | 2012-12-25 | 2013-03-20 | 中冶北方（大连）工程技术有限公司 | Sinter feeding system and method for improving burden distribution of blast furnace |
| CN103643038B (en) * | 2013-11-22 | 2015-07-22 | 攀钢集团攀枝花钢钒有限公司 | Paving method for sintering machine's bilayer bedding materials |
| CN104043579B (en) * | 2014-06-24 | 2017-07-18 | 柳州钢铁股份有限公司 | Converter final sinter screening technique and coverter pig sintering machine screening pelletizing machine |
| 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 |
| CN110541072A (en) * | 2019-09-19 | 2019-12-06 | 昆明理工大学 | treatment method and treatment system for harmless utilization of hyper-enriched plants |
| CN115069554A (en) * | 2022-06-17 | 2022-09-20 | 武汉钢铁有限公司 | Flow dividing and screening system and working method thereof |
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