CN103334004A - Method for producing sinter from Yuanjia village concentrate powder by using large sintering machine - Google Patents
Method for producing sinter from Yuanjia village concentrate powder by using large sintering machine Download PDFInfo
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- CN103334004A CN103334004A CN2013102673444A CN201310267344A CN103334004A CN 103334004 A CN103334004 A CN 103334004A CN 2013102673444 A CN2013102673444 A CN 2013102673444A CN 201310267344 A CN201310267344 A CN 201310267344A CN 103334004 A CN103334004 A CN 103334004A
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Abstract
The invention relates to a method for producing sinter from Yuanjia village concentrate powder by using a large sintering machine. The method comprises the following steps of: (I) portioning raw materials: 20-50 parts of Yuanjia village concentrate powder, 35-50 parts of Jianshan ore powder, less than or equal to 25 parts of Yangdi ore powder, 3-5 parts of steel slag, 3-5 parts of mill scale and less than or equal to 3 parts of serpentine; mixing the raw materials into a uniformly-mixed support material; and mixing the uniformly-mixed support material, blast furnace return ore, lime, dolomite and coke powder to obtain sinter; (II) adding water into the sinter and mixing; (III) pelletizing, wherein the content of the pellets larger than or equal to 3mm is greater than or equal to 70%; (IV) performing solvent and fuel wrapping operation on the added coke powder and dolomite in the materials from the pelletizer in a three-times mixing machine; (V) distributing and pressing materials, wherein the thickness of the material layer is 720-740mm after the distribution; (VI) igniting, wherein the ignition air temperature is 800-900 DEG C, and the ignition temperature is 1,040-1,050 DEG C; (VII) sintering to obtain sinter; and (VIII) screening. The method for producing sinter provided by the invention has the advantages of reasonable ore blending and enhanced uniform mixing, and realizes high sinter quality.
Description
Technical field
The present invention relates to a kind of large-type sinterer adapted Yuan Jia village fine ore and produce the method for agglomerate.
Background technology
The applicant has a 660m that the whole world is maximum
2Sinter machine, general large-type sinterer (〉=400m
2) for large blast furnace provides agglomerate, raw material is rich fine ore or based on rich fine ore (granularity accounts for more than 50% greater than 1mm), rich fine ore ratio is more than 90% entirely.Substantially be full rich ore powder sintering as Japan, domestic Baosteel 495m2 sinter machine, the Shoudu Iron and Steel Co capital 550m2 of Tang sinter machine, smart powder ratio is less than 10% once in a while.And the applicant invests and has built Yuan Jia village iron ore, produces 7500000 tons of ultra-fine fine iron breezes per year, except 2,500,000 tons for the production of the pelletizing, have 5,000,000 tons to be used for sintering approximately, make 660m
2Sinter machine must be based on ultra-fine fine ore.Ultra-fine fine ore can worsen the mixing bed permeability, influences product, the quality of agglomerate.
Yuan Jia village fine ore is based on rhombohedral iron ore and contains the complicated fine iron breeze of a small amount of magnetite and limonite, in its size composition-and 0.043mm has surpassed 95%, is a kind of ultra-fine fine ore.The fine ore of adapted fineness like this is very disadvantageous for large-type sinterer mixture ventilation and sintering process, can make sintering process slack-off, and product, degradation more seriously can cause sintering flame-out, can not burn.But as much as possible utilizing self-produced resource, is to reduce blast-melted smelting cost, the effective means of related company survival and development.
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Summary of the invention
Produce the above-mentioned deficiency of the method for agglomerate in order to overcome existing large-type sinterer adapted Yuan Jia village fine ore,
The invention provides a kind of join the ore deposit rationally, strengthen mixing, the method that the large-type sinterer adapted Yuan Jia village fine ore that sinter quality is high is produced agglomerate.
The self-produced Yuan Jia of applicant village its crystal grain of fine ore is superfine, and very responsive to moisture, the adequate moisture interval is narrower; The ore particle surface is more smooth, and the grade narrow distribution is although the fine size pellet performance is not fine.Therefore the breeze that belongs to a kind of mineral composition complexity, basic property uniqueness.It and magnet fine mineral powder, YD powder, slag, iron scale and flux are carried out rational ore matching form a kind of mixing ore deposit, set up powerful mixer with after strengthening mixing, prepare burden with other flux and fuel again, rationally control parameter, formed large-scale 660m
2Sinter machine is the thin fine ore of adapted at high proportion, produces the sintering method of agglomerate.
Principle wherein:
The one, suit to join the ore deposit and determine reasonable raw material mix, be beneficial to granulate and intensified-sintered process reaction, impelling agglomerate to form with the calcium ferrite is the mineral structure of main bonding phase; On the other hand, carry out supporting favourable measure and implement, guarantee the improvement of permeability of sintering material bed, obtain the rational method that the ultra-large type sinter machine is produced the high quality agglomerate.
Join the ore deposit principle:
The sintering process reaction comprises:
C+O
2=CO
Fe
2O
3+ CO=Fe
3O
4+ CO
2+ 37136.92J/gmol needs heat absorption
And 2Fe
3O
4+ 1/2O
2=3Fe
2O
3Thermopositive reaction
Utilize pellet performance preferably magnet fine mineral powder join the ore deposit with it, one, strengthen granulating efficiency, two, with the augmenting response face, guarantee the reasonable balance of sintering process heat, to reduce solid fuel consumption.Adapted granularity YD ore deposit thick and the assimilation better performances adds joins the ore deposit, intensified response, and improve the ventilation property of compound.
Adapted iron scale (being a kind of iron scale of Steel Plant's recycling), one, improve the iron grade, two, utilize oxidation institute liberated heat.
Yuan Jia village fine ore mineral composition complexity (seeing Table 1), granularity be thin (seeing Table 2) very, and-325 order content reach more than 95%, it is to moisture-sensitive, and the adequate moisture interval is narrow, the bad control of sintering parameter when ratio is higher, sintering process is slack-off, even can cause sintered material flame-out.Therefore, in order on large-type sinterer, rationally to utilize Yuan Jia village fine ore, need find out rational proportion and the suitable ore deposit kind of joining.On the condition of utilizing existing processing unit, most important to the adjustment of sintering process parameter.
Table 1 Yuan Jia village fine ore thing phase composite table %
Table 2 Yuan Jia village fine ore granularity (with the contrast of sharp mountain powdered iron ore) detected result %
| Grade/order | +200 | 200~325 | -325 |
| Yuan Jia village fine ore | 1～1.3 | 3～3.3 | 94～96.5 |
| Point mountain powdered iron ore | 1～2 | 13.5～14.5 | 83～85 |
The composition of the breeze that the present invention adopts sees Table 3
Table 3 breeze Chemical Composition table
| Title | ＴFe | FeO | SiO 2 | Al 2O 3 | CaO | MgO | P | S | Ig |
| Brown ocher | 57.73 | 0.59 | 5.59 | 1.77 | 0.073 | 0.080 | 0.037 | 0.010 | 10.38 |
| Magnet fine mineral powder | 68.9 | 27.42 | 3.92 | 0.19 | 0.27 | 0.35 | 0.01 | 0.026 | 0.45 |
| The smart powder in Yuan Jia village | 65.4 | 3.3 | 3.78 | 0.21 | 0.26 | 0.27 | 0.015 | 0.012 | 0.32 |
| Slag | 45.42 | 26.01 | 6.55 | 0.87 | 8.55 | 1.76 | 0.04 | 0.24 | 12.23 |
| Iron scale | 72.67 | 62.94 | 0.18 | 0.09 | 0.2 | 0.048 | ? | ? | ? |
The method that this large-type sinterer adapted Yuan Jia village fine ore is produced agglomerate comprises following sequential steps:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
20～50 parts of Yuan Jia village fine ores; 35～50 parts of point mountain breezes;
Raise enlightening breeze≤25 part;
3～5 parts in slag; 3～5 parts of iron scales; Serpentine≤3 part;
With above-mentioned admixtion, be placed on the secondary stock ground, fetch water then that it is wetting in advance to carry out, guarantee that wetting (quality of water reach total amount 6.5-7.4%) moisture mass parts reaches 7-8 parts in advance;
Mix with intensive mixer again, become the mixing admixtion;
The proportion by weight of b sintered material
When if the mixing admixtion is 100 parts
Blast furnace is returned mine 11～15 parts; Lime 4～
8Part; 4～6 parts of rhombspars;
Coke powder 4～
5.5Part;
Wherein, blast furnace is returned mine and is added water pipe in batching disk blanking place, carries out wettingly in advance, and pre-wetting back moisture content is 6～7%.
IIThe sintered material mixing
Above-mentioned sintered material is transported in a mixing machine and carries out mixture operation, and mixture moisture is 6～7%;
IIIGranulate
Come out to enter nodulizer from mixer, the operation of granulating, content 〉=70% of granulation ball requirement 〉=3mm; Set up atomizer in the nodulizer, the moisture content in the granulation ball is 6～7.5%;
IVWrap up in fuel and flux outward
Coke powder and rhombspar that the material that comes out from nodulizer is joined outside travelling belt adds, the amount of allocating into of coke powder account for total material
2～3%, the amount of allocating into of rhombspar accounts for total material
2.5～4.5%, enter then and carry out flux, fuel in No. three mixing machines and wrap up in operation outward, coke coated and rhombspar; Particle diameter is not less than content 〉=68% of 3mm;
The granularity of joining coke powder outward is not more than 1mm, and the granularity of joining rhombspar outward is not more than 3mm;
VCloth and binder
To sinter machine, bed depth is 720-740mm behind the cloth with the mixture cloth of wrapping up in fuel outward, and the binder degree of depth is 15-250mm;
VIIgniting
The hot gas sintering parameter: the control of igniting wind-warm syndrome is at 800-900 ℃, and ignition temperature is controlled at 1040-1050 ℃; Holding temperature is 590---610 ℃;
VIISintering
Sintering machine speed 2～2.8m/min; Sintering negative pressure: 11 ~ 16Kpa sinters agglomerate into;
VIIIScreening
Agglomerate will be not less than the 5mm agglomerate and deliver to blast furnace after whole grain screening is handled, and will return internal recycle as returning mine less than the agglomerate of 5mm.
Above-mentioned large-type sinterer adapted Yuan Jia village fine ore is produced the method for agglomerate, it is characterized in that:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
35 parts of Yuan Jia village fine ores; 35 parts of high mouth breezes; Raise 22 parts of enlightening breezes;
3 parts in slag; 3 parts of iron scales; 2 parts in serpentine;
The proportion by weight of b sintered material is
100 parts of mixing admixtiones; Blast furnace is returned mine 14.8 parts;
8 parts of limes; 5.8 parts of rhombspars; 5.5 parts of coke powders.
Beneficial effect of the present invention
At applicant 660m
2Adopt Yuan Jia village's fine ore and magnet fine mineral powder, iron scale, steel grit, YD, serpentine to join the ore deposit under the sinter machine 730mm bed depth condition, by implementing effective supplementary measures, at agglomerate SiO
2Content is 4.7 ~ 5.5%, sintering basicity (CaO/SiO
2) be 1.8～2.1 o'clock, will obtain sintered ore rotary drum strength 〉=79.5%, reduction degree 〉=80%, cryogenic reducting powder index (+3.15mm) 〉=68% good index.
The ultra-fine Yuan Jia of 660m2 sinter machine adapted village fine ore sintering technology, the Iron Ore Matching in Sintering cost is low, rationally utilize self-produced low-cost resource, and guarantees that sinter quality does not glide, and can satisfy blast furnace high target operating requirement fully.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is carried out clear, complete description.Described embodiment is several embodiments of the present invention, rather than limitation of the present invention.The large-type sinterer adapted Yuan Jia village fine ore that those of ordinary skills do not have to obtain under the creative work prerequisite is produced the technical scheme of agglomerate, all belongs to protection scope of the present invention.
Embodiment 1
This 660m2 sinter machine adapted Yuan Jia village fine ore sintering method comprises following sequential steps:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
40 parts of Yuan Jia village fine ores; 40 parts of point mountain breezes; Raise 10 parts of enlightening breezes; 5 parts in slag; 3 parts of iron scales; 2 parts in serpentine;
Wherein sharp mountain breeze is magnetite; Raising the enlightening breeze is limonite;
Prepare burden into admixtion in advance for totally 100 parts; Be placed on the secondary stock ground, fetch water then that it is wetting in advance to carry out, guarantee that pre-wetting moisture (quality of water reach total amount 6.5-7.4%) mass parts reaches 7-8 parts;
Permitted the vertical strengthened mixing machine of DW40 with love power again and mixed through 4 minutes, become the mixing admixtion;
The proportion by weight of b sintered material is
100 parts of mixing admixtiones; Blast furnace is returned mine 15 parts;
7.5 parts of limes; 5.5 parts of rhombspars; 5.5 parts of coke powders;
Totally 133.5 parts;
Wherein, blast furnace is returned mine and is added water pipe in blanking place of batching disk, carries out wetting in advance.Pre-wetting back moisture content is 6～7%.
IIThe sintered material mixing
Above-mentioned sintered material is transported in a mixing machine and carries out mixture operation, and mixture moisture is 6～7%.Present embodiment is 20 tons of amount of water per hour.The wetting compound that begins to spray water apart from 4 meters of discharging point is to prolong mixing time.
IIIGranulate
Come out to enter nodulizer from mixer, the operation of granulating, the granulation ball requires: the content of 〉=3mm 〉=70%.Set up atomizer in the nodulizer, per hour adding the hot water amount is 5 tons.Moisture content in the grain ball is 7.5%.
Nodulizer parameter control: 1.5 ° at inclination angle, rotating speed: 7r/min.
IVWrap up in fuel and flux outward
Coke powder and rhombspar that the material that comes out from nodulizer (grain ball) is joined outside travelling belt adds; the amount of allocating into of coke powder (weight) accounts for 2.5% of total material; the amount of allocating into of rhombspar (weight) accounts for 4.0% of total material; enter then and carry out flux, fuel in No. three mixing machines and wrap up in operation outward, coke coated and rhombspar.Particle diameter is not less than content 〉=68% of 3mm.
The granularity of joining coke powder outward is not more than 1mm, and the granularity of joining rhombspar outward is not more than 3mm.
VCloth and binder
The mixture (grain ball) of wrapping up in fuel is outward passed through circle roller+nine roller distributor cloth to sinter machine, bed depth is 730mm behind the cloth, the binder degree of depth is (cloth is 730mm to the material on the sinter machine apart from the sinter machine bottom level, and after binder was taked on the surface, bed thickness was to 710mm) 20mm.
VIIgniting
The hot gas sintering parameter: the control of igniting wind-warm syndrome is at 800-900 ℃, and ignition temperature is controlled at 1050 ℃.Holding temperature is 600 ℃.
VIISintering
Sintering machine speed 2～2.8m/min.Sintering negative pressure: 11 ~ 16Kpa sinters agglomerate into.
VIIIScreening
Agglomerate will be not less than the 5mm agglomerate and deliver to blast furnace after whole grain screening is handled, and will return internal recycle as returning mine less than the agglomerate of 5mm.
Embodiment 2
This 660m2 sinter machine adapted Yuan Jia village fine ore sintering method comprises following sequential steps:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
35 parts of Yuan Jia village fine ores; 35 parts of high mouth breezes; Raise 22 parts of enlightening breezes;
3 parts in slag; 3 parts of iron scales; 2 parts in serpentine;
Prepare burden into admixtion in advance for totally 100 parts; Be placed on the secondary stock ground, fetch water then that it is wetting in advance to carry out, guarantee that pre-wetting moisture mass parts reaches 7-8 parts;
Permitted the vertical strengthened mixing machine of DW40 with love power again and mixed through 4 minutes, become the mixing admixtion;
The proportion by weight of b sintered material is
100 parts of mixing admixtiones; Blast furnace is returned mine 14.8 parts;
Lime
8. part; Rhombspar
5.8Part; Coke powder
5.5Part;
Wherein, blast furnace is returned mine and is added water pipe in blanking place of batching disk, carries out wetting in advance.Pre-wetting back moisture content is 6～7%.
Step
IISintered material mixing, step
IIIGranulation, step
IVWrap up in fuel and flux, step outward
VCloth and binder, step
VIIgniting, step
VIISintering and step
VIIIScreening, identical with embodiment one.
Agglomerate will be not less than the 5mm agglomerate and deliver to blast furnace after whole grain screening is handled, and will return internal recycle as returning mine less than the agglomerate of 5mm.
Claims (2)
1. method that large-type sinterer adapted Yuan Jia village fine ore is produced agglomerate, it comprises following sequential steps:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
20～50 parts of Yuan Jia village fine ores; 35～50 parts of point mountain breezes; Raise enlightening breeze≤25 part;
3～5 parts in slag; 3～5 parts of iron scales; Serpentine≤3 part;
With above-mentioned admixtion, be placed on the secondary stock ground, fetch water then that it is wetting in advance to carry out, guarantee that pre-wetting moisture mass parts reaches 7-8 parts;
Mix with intensive mixer again, become the mixing admixtion;
The proportion by weight of b sintered material
When if the mixing admixtion is 100 parts
Blast furnace is returned mine 11～15 parts; Lime 4～
8Part; 4～6 parts of rhombspars;
Coke powder 4～
5.5Part;
Wherein, blast furnace is returned mine and is added water pipe in blanking place of batching disk, carries out wetting in advance;
IIThe sintered material mixing
Above-mentioned sintered material is transported in a mixing machine and carries out mixture operation, and mixture moisture is 6～7%;
IIIGranulate
Come out to enter nodulizer from mixer, the operation of granulating, content 〉=70% of granulation ball requirement 〉=3mm; Set up atomizer in the nodulizer, the moisture content in the granulation ball is 6～7.5%;
IVWrap up in fuel and flux outward
Coke powder and rhombspar that the material that comes out from nodulizer is joined outside travelling belt adds, the amount of allocating into of coke powder account for total material
2～3%, the amount of allocating into of rhombspar accounts for total material
2.5～4.5%, enter then and carry out flux, fuel in No. three mixing machines and wrap up in operation outward, coke coated and rhombspar; Particle diameter is not less than content 〉=68% of 3mm;
The granularity of joining coke powder outward is not more than 1mm, and the granularity of joining rhombspar outward is not more than 3mm;
VCloth and binder
To sinter machine, bed depth is 720-740mm behind the cloth with the mixture cloth of wrapping up in fuel outward, and the binder degree of depth is 15-250mm;
VIIgniting
The hot gas sintering parameter: the control of igniting wind-warm syndrome is at 800-900 ℃, and ignition temperature is controlled at 1040-1050 ℃; Holding temperature is 590---610 ℃;
VIISintering
Sintering machine speed 2～2.8m/min; Sintering negative pressure: 11 ~ 16Kpa sinters agglomerate into;
VIIIScreening
Agglomerate will be not less than the 5mm agglomerate and deliver to blast furnace after whole grain screening is handled, and will return internal recycle as returning mine less than the agglomerate of 5mm.
2. the large-type sinterer adapted Yuan Jia according to claim 1 village fine ore method of producing agglomerate is characterized in that:
IProportion of raw materials
The proportion by weight of a mixing admixtion is
35 parts of Yuan Jia village fine ores; 35 parts of high mouth breezes; Raise 22 parts of enlightening breezes;
3 parts in slag; 3 parts of iron scales; 2 parts in serpentine;
The proportion by weight of b sintered material is
100 parts of mixing admixtiones; Blast furnace is returned mine 14.8 parts;
8 parts of limes; 5.8 parts of rhombspars; 5.5 parts of coke powders.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073628A (en) * | 2014-07-02 | 2014-10-01 | 山西太钢不锈钢股份有限公司 | Iron scale sintering addition method |
| CN105483369A (en) * | 2016-01-29 | 2016-04-13 | 山东钢铁股份有限公司 | Mixture preparation method for improving sintering capacity |
| CN107304461A (en) * | 2016-04-25 | 2017-10-31 | 中冶长天国际工程有限责任公司 | Strength hybrid technique and its device for sintering production |
| CN110629017A (en) * | 2019-10-16 | 2019-12-31 | 广东韶钢松山股份有限公司 | Sintered iron-containing material, sintered composition, sintered ore and method for producing same |
| CN111041195A (en) * | 2020-01-03 | 2020-04-21 | 中南大学 | Strong mixing-granulating method for strengthening sintering of high-proportion micro-fine particle raw materials |
| CN111363916A (en) * | 2020-05-10 | 2020-07-03 | 乌海市包钢万腾钢铁有限责任公司 | Method for determining rotating speed of sintering granulator |
| CN113801991A (en) * | 2020-06-16 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Method for improving quality of sinter |
| CN113930613A (en) * | 2021-10-13 | 2022-01-14 | 四川德胜集团钒钛有限公司 | Method for improving steel slag proportion in uniformly mixed ore |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073628A (en) * | 2014-07-02 | 2014-10-01 | 山西太钢不锈钢股份有限公司 | Iron scale sintering addition method |
| CN105483369A (en) * | 2016-01-29 | 2016-04-13 | 山东钢铁股份有限公司 | Mixture preparation method for improving sintering capacity |
| CN107304461A (en) * | 2016-04-25 | 2017-10-31 | 中冶长天国际工程有限责任公司 | Strength hybrid technique and its device for sintering production |
| CN107304461B (en) * | 2016-04-25 | 2019-04-19 | 中冶长天国际工程有限责任公司 | Strength hybrid technique and its device for sintering production |
| CN110629017A (en) * | 2019-10-16 | 2019-12-31 | 广东韶钢松山股份有限公司 | Sintered iron-containing material, sintered composition, sintered ore and method for producing same |
| CN110629017B (en) * | 2019-10-16 | 2021-04-02 | 广东韶钢松山股份有限公司 | Sintered iron-containing material, sintered composition, sintered ore and method for producing same |
| CN111041195A (en) * | 2020-01-03 | 2020-04-21 | 中南大学 | Strong mixing-granulating method for strengthening sintering of high-proportion micro-fine particle raw 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 |
| CN111363916A (en) * | 2020-05-10 | 2020-07-03 | 乌海市包钢万腾钢铁有限责任公司 | Method for determining rotating speed of sintering granulator |
| CN113801991A (en) * | 2020-06-16 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Method for improving quality of sinter |
| CN113930613A (en) * | 2021-10-13 | 2022-01-14 | 四川德胜集团钒钛有限公司 | Method for improving steel slag proportion in uniformly mixed ore |
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