CN102605176A - Low-temperature pulverization inhibitor for sintered ore - Google Patents
Low-temperature pulverization inhibitor for sintered ore Download PDFInfo
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- CN102605176A CN102605176A CN2012101013565A CN201210101356A CN102605176A CN 102605176 A CN102605176 A CN 102605176A CN 2012101013565 A CN2012101013565 A CN 2012101013565A CN 201210101356 A CN201210101356 A CN 201210101356A CN 102605176 A CN102605176 A CN 102605176A
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- agglomerate
- low
- low temperature
- coke
- temperature pulverization
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Abstract
The invention relates to a smelting assistant for steel works, namely a low-temperature pulverization inhibitor for sintered ore. The low-temperature pulverization inhibitor is prepared by mixing carboxymethyl starch, boric acid, silicon micropowder and a permeate agent in designated proportion; compared with CaCl, Cl ion drag-in quantity is reduced more than 50%, the low-temperature pulverization inhibitor can not generate a replacement reaction with K and Na alkali metals in a furnace charge, therefore, the problem of continuous and circulating enrichment of KCl (kirchhoff's circuit laws) and NaCl in a blast furnace is solved, the reactivity of coke is restrained, the melting loss reaction is reduced, the heat intensity of the coke is ensured, low temperature reduction pulverization rate of the sintered ore is reduced, the destructive effect of the alkali metal on the coke and the blast furnace is basically solved, the furnace condition is smooth, and the output is increased.
Description
Technical field
The present invention relates to a kind of Iron And Steel Plant and use smelting auxiliary agent, promptly agglomerate is used the low temperature pulverization inhibitor.
Background technology
In the prior art; As everyone knows, blast furnace is to hope higher-grade, low silicon to the requirement of furnace charge, so domestic many Iron And Steel Plant have descended the very big time on high iron low silicon; Improve constantly the grade of agglomerate; Reduce detrimental impurity, but low silicon sintering inevitably causes the increase of low temperature reduction degradation index, and blast furnace is brought negative influence.
Low temperature reduction degradation is meant under the reducing atmosphere of 400～600 ℃ on blast furnace top in agglomerate, regeneration Fe
2O
3Be reduced into Fe
3O
4Process in, great changes will take place for the crystalline structure, produces great internal stress, volumetric expansion makes agglomerate structure reduction, powder phenomenon-tion occurs, produces more powder.Because a large amount of powder that efflorescence produces make blast furnace top ventilation property variation, influence the distribution of coal gas and the carrying out of reduction reaction in the blast furnace, cause coke ratio to raise, economic benefit descends.
Domestic many iron and steel corporation are taked to spray CaCl at agglomerate surface, suppress and reduce the low temperature efflorescence of agglomerate, reduce the low temperature reduction degradation index of agglomerate, to improve the ventilation property of blast furnace lump zone.Yet K in the furnace charge and Na can cement out the Ca among the CaCl, generate KCl and NaCl, constantly circulation enrichment in blast furnace.Can strengthen the gasification reaction ability of coke after K, the Na gasification, make coke strenth sharply reduce efflorescence, cause the permeability of stock column severe exacerbation.Simultaneously, K
2O, Na
2Alkalimetal oxides such as O can reduce the softening temperature of ore in blast furnace, make ore abundant reduction fusing drippage just as yet, have increased the direct reduction heat exhaustion of bottom house, can also cause unusual expansion and the serious efflorescence of pellet.Liquid-solid attitude alkalimetal oxide sticks on the furnace lining, can make the serious dross of furnace wall, can directly destroy bricking again.Influence the ventilation property of blast furnace top stock column when serious, reduce gas utilization rate, destroy furnace condition anterograde.
Summary of the invention
The objective of the invention is provides a kind of effective agglomerate of low temperature efflorescence of controlling to use the low temperature pulverization inhibitor to above-mentioned deficiency.
Technical solution of the present invention is: agglomerate is processed by the raw material of following mass percent with the low temperature pulverization inhibitor:
CMS 8%-12%,
Boric acid 50%-70%,
Silicon powder 20%-30%,
Permeate agent 3%-8%.
CMS: sticker, make aqueous solution thickness, solution forms protective membrane on agglomerate, hinder CO and CO
2Erosion to agglomerate.Boric acid: stablizer, the Fe when temperature＜500 ℃ in slowing down CO and the agglomerate
2O
3And calcium ferrite (CaO.Fe
2O
3) redox reaction, the intensity of assurance agglomerate.Silicon powder: particle thin (300 order), can overlay on agglomerate surface uniformly, fan's plug agglomerate space, the obstruction reducing gas contacts with agglomerate, slows down chemical reaction.Permeate agent: solution is penetrated in the middle of the agglomerate space fast, forms protective membrane, optional fast penetrant T, JFC permeate agent or GPG quickly penetrating agent.
Preparing method: ratio oven dry according to the rules, grinding, mixing, roll, stir after detect the qualified packing of carrying out.
Agglomerate is with the low temperature pulverization inhibitor mechanism of action: agglomerate low temperature pulverization inhibitor is traditional C aCl
2The upgraded product of (halogenide).It is to be formed by prescriptions such as complex halide, solid flux, passivator, sprays agglomerate low temperature pulverization inhibitor solution at agglomerate surface, mainly is in order to reduce the agglomerate low temperature reduction degradation index, to improve conditions of blast furnace, increasing production and fall Jiao.Agglomerate low temperature pulverization inhibitor is can substitute traditional CaCl through a large amount of theoretical investigationes and practice test; And obtain the product innovation of remarkable raising the output consumption reduction effect; She is made up through a kind of metallurgy additive that grinds, dries, the check packing forms by multiple non-energy property industrial chemicals in proportion, sprays the metallurgical performance that agglomerate low temperature pulverization inhibitor can obviously improve agglomerate and coke at agglomerate surface, impels the conditions of blast furnace direct motion; Reduce coke ratio, improve pig iron output.
Usage and consumption: 1, on the finished product agglomerate, use, agglomerate low temperature pulverization inhibitor is dissolved in the water in proportion, and then be sprayed onto the surface of agglomerate by atomizer with addition of equipment.2, consumption: 3/10000ths to 5/10000ths of finished product agglomerate.
Advantage of the present invention is: 1, compare and reduce the Cl ion amount of bringing into more than 50% with CaCl, adopt complex halide to substitute after, not with furnace charge in K, Na basic metal generation replacement(metathesis)reaction, solved the problem of KCl and NaCl continuous circulation enrichment in blast furnace.Simultaneously contained solid solution agent, passivator are in distillation more than 750 ℃ but do not decompose; Steam rises on the blast furnace does not have condensation behind the cold zone, and constantly the enrichment postadhesion can form protective membrane in the STRENGTH ON COKE surface in coke surface, suppresses the reactivity of coke; Reduce the melting loss reaction, guarantee the hot strength of coke.2, spray agglomerate low temperature pulverization inhibitor solution at agglomerate surface, make it to cover equably agglomerate surface, the crack and the hole of fan's plug agglomerate; In the low temperature efflorescence interval on blast furnace top; The obstruction reducing gas contacts with agglomerate, and reduction reaction is obviously slowed down, and makes Fe
2O
3Obtained protection, eliminated the internal stress of agglomerate in reduction process, reduced the low temperature reduction degradation index (can reduce-3.15 parts 8%～12%) of agglomerate through test.Basically thoroughly solved the destruction of basic metal STRENGTH ON COKE and blast furnace, made furnace condition anterograde, output increases.3, because the agglomerate low temperature reduction degradation index descends, and powder reduces, ventilation property improves; Gas flue through the bed of material has improved, the cohesive zone attenuate, and lump zone enlarges; Promoted the raising of smelting strength of blast furnace, air quantity increases, and blast furnace permeability and gas utilization rate improve; Furnace processor improves, and coke ratio reduces, and the stove dirt that can reduce blast furnace simultaneously reduces dross; (show that according to pertinent data RDI+3.15 improves 5%-10%, furnace processor can increase by 1.5%, and coke ratio can reduce by 1.55%.)
To combine embodiment that embodiment of the present invention is described in further detail below.
Embodiment
Embodiment 1
Agglomerate is processed by the raw material of following mass percent with the low temperature pulverization inhibitor: CMS 10%, boric acid (99.6%) 62%, silicon powder (3000 order) 23%, fast penetrant T 5%.
Embodiment 2
Agglomerate is processed by the raw material of following mass percent with the low temperature pulverization inhibitor: CMS 9%, boric acid 59%, silicon powder 25%, fast penetrant T 7%.
Embodiment 3
Agglomerate is processed by the raw material of following mass percent with the low temperature pulverization inhibitor: CMS 10%, boric acid 60%, silicon powder 25%, fast penetrant T 5%.
Embodiment 4
Agglomerate is processed by the raw material of following mass percent with the low temperature pulverization inhibitor: CMS 10%, boric acid 55%, silicon powder 30%, fast penetrant T 5%.
Agglomerate low temperature pulverization inhibitor physical and chemical index:
| Outward appearance | White or light grey powder |
| Granularity (order) | 30～150 |
| The pH value | 7～8 |
| Density (g/cm 3) | 1.15±0.1 |
| Active constituent content | ≥98％ |
Claims (4)
1. an agglomerate is used the low temperature pulverization inhibitor, it is characterized in that it is processed by the raw material of following mass percent:
CMS 8%-12%,
Boric acid 50%-70%,
Silicon powder 20%-30%,
Permeate agent 3%-8%.
2. use the low temperature pulverization inhibitor according to the described agglomerate of claim 1, it is characterized in that CMS 10%, boric acid 62%, silicon powder 23%, fast penetrant T 5%.
3. use the low temperature pulverization inhibitor according to the described agglomerate of claim 1, it is characterized in that CMS 9%, boric acid 59%, silicon powder 25%, fast penetrant T 7%.
4. use the low temperature pulverization inhibitor according to the described agglomerate of claim 1, it is characterized in that CMS 10%, boric acid 60%, silicon powder 25%, fast penetrant T 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101013565A CN102605176A (en) | 2012-04-09 | 2012-04-09 | Low-temperature pulverization inhibitor for sintered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101013565A CN102605176A (en) | 2012-04-09 | 2012-04-09 | Low-temperature pulverization inhibitor for sintered ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102605176A true CN102605176A (en) | 2012-07-25 |
Family
ID=46522936
Family Applications (1)
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| CN2012101013565A Pending CN102605176A (en) | 2012-04-09 | 2012-04-09 | Low-temperature pulverization inhibitor for sintered ore |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899429A (en) * | 2012-09-19 | 2013-01-30 | 秦皇岛赛文冶金科技有限公司 | Blast furnace smelting raw material modifier |
| CN103409616A (en) * | 2013-09-05 | 2013-11-27 | 中南大学 | Method for inhibiting low-temperature reduction degradation of sintering ore of iron ore |
| CN113584240A (en) * | 2021-07-28 | 2021-11-02 | 北京首钢股份有限公司 | Blast furnace material distribution method |
| CN114480836A (en) * | 2021-12-22 | 2022-05-13 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-proportion vanadium-titanium magnetite concentrate and preparation method thereof |
| CN114622087A (en) * | 2022-02-07 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by using iron ore concentrate with high alkali metal content |
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| CN1099423A (en) * | 1994-06-30 | 1995-03-01 | 潘金海 | Organic binder for metallurgy |
| CN1598008A (en) * | 2004-07-30 | 2005-03-23 | 孙挺 | Surface additive for sintering mine of iron smelting by furnace |
| CN101144119A (en) * | 2007-10-15 | 2008-03-19 | 莱芜钢铁集团有限公司 | Auxiliary agent for reducing low temperature reduction index of sintering ore |
| CN101463423A (en) * | 2009-01-12 | 2009-06-24 | 北京科技大学 | Composite spraying agent for iron sintering ore |
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2012
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| CN1099423A (en) * | 1994-06-30 | 1995-03-01 | 潘金海 | Organic binder for metallurgy |
| CN1598008A (en) * | 2004-07-30 | 2005-03-23 | 孙挺 | Surface additive for sintering mine of iron smelting by furnace |
| CN101144119A (en) * | 2007-10-15 | 2008-03-19 | 莱芜钢铁集团有限公司 | Auxiliary agent for reducing low temperature reduction index of sintering ore |
| CN101463423A (en) * | 2009-01-12 | 2009-06-24 | 北京科技大学 | Composite spraying agent for iron sintering ore |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899429A (en) * | 2012-09-19 | 2013-01-30 | 秦皇岛赛文冶金科技有限公司 | Blast furnace smelting raw material modifier |
| CN103409616A (en) * | 2013-09-05 | 2013-11-27 | 中南大学 | Method for inhibiting low-temperature reduction degradation of sintering ore of iron ore |
| CN113584240A (en) * | 2021-07-28 | 2021-11-02 | 北京首钢股份有限公司 | Blast furnace material distribution method |
| CN114480836A (en) * | 2021-12-22 | 2022-05-13 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-proportion vanadium-titanium magnetite concentrate and preparation method thereof |
| CN114480836B (en) * | 2021-12-22 | 2023-09-12 | 武钢集团昆明钢铁股份有限公司 | Low-cost sinter of high-ratio vanadium-titanium magnetite concentrate and preparation method thereof |
| CN114622087A (en) * | 2022-02-07 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by using iron ore concentrate with high alkali metal content |
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Application publication date: 20120725 |