CN101285116A - Iron ore adglutinate synergism combustion adjuvant and method for preparing same - Google Patents
Iron ore adglutinate synergism combustion adjuvant and method for preparing same Download PDFInfo
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- CN101285116A CN101285116A CNA200710072006XA CN200710072006A CN101285116A CN 101285116 A CN101285116 A CN 101285116A CN A200710072006X A CNA200710072006X A CN A200710072006XA CN 200710072006 A CN200710072006 A CN 200710072006A CN 101285116 A CN101285116 A CN 101285116A
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Abstract
The invention discloses an iron ore sintering synergistic combustion improver and a method for preparing the same. The iron ore sintering synergistic combustion improver is formed by mixing the following materials according to a certain proportion: potassium permanganate, sodium nitrate, dicyclopentadienyl iron, methenamine, boric acid, borax, sodium chloride and polyvinyl alcohol. Through using methods such as gasifying for oxygenation, combustion-supporting, catalyzing, stabilizing, intensifying and so on, the aims of reducing fuel consumption, improving utilization coefficient of a sintering machine, increasing sintering ore strength, improving rate of finished products, reducing return fine rate, reducing SO2 content in sintering exhaust gas are realized. The iron ore sintering synergistic combustion improver and the method can reach the effects of saving energy, improving efficiency and protecting environment and provide good economic benefit and social benefit for enterprises.
Description
Technical field:
The present invention is applied to iron and steel metallurgical industry to make agglomeration for iron mine can reach energy-conservation, synergy, environmental protection purpose, is that enterprise creates good economic benefit and social benefit.
Background technology
Ferrous metallurgy industry is one of the maximum industry that consumes energy in the Chinese national economy every profession and trade.Over past ten years, ferrous metallurgy industrial energy consumption accounts for the proportion of national total energy consumption always 12%～15%, and unit increased value energy consumption is more than 3 times of whole industrial mean level (ML)s.Therefore, Iron And Steel Industry is energy-conservation to be to be related to the major issue that can " 11th Five-Year " power dissipation obj ectives realize smoothly, also is a major issue that is related to Iron And Steel Industry future development.Five ministries and commissions such as National Development and Reform Committee unite and have issued " about the notice of thousand tame industry energy conservations action embodiments ", comprising 260 families of iron and steel enterprise
The emphasis of Iron industry development is energy-conservation, synergy and environmental protection, this is because ironmaking is energy consumption rich and influential family and the primary pollution source in the Iron and Steel Production, the iron manufacturing process of forming by each operation of sintering, nodularization, coking and blast furnace, consumed nearly 70% of ton steel total energy, and sintering is as the important component part of iron manufacturing process, its cost, quality and output have directly influenced the comprehensive benefit of smelting iron.
Summary of the invention
The objective of the invention is for iron and steel enterprise energy-conservation, synergy, environmental protection, a kind of application steel industry iron ore adglutinate synergism combustion adjuvant is provided, after proportioning is added a spot of adglutinate synergism combustion adjuvant in combustion mix by a certain percentage in compound, gasification, and combustion to fuel plays certain katalysis, can reduce smeltery's sintering solid fuel consumption, accelerate to smelt the sintering process combustionvelocity, improve the utilization coefficient of smelting sinter machine, increase agglomerate output and intensity, improve and smelt sintering velocity and sinter strength, reduce the pink blossom rate, improve into the mineral amount, make the smeltery energy-conservation, synergy, an aspect such as environmental protection can obtain remarkable economic efficiency and social benefit.
The objective of the invention is to be achieved through the following technical solutions
Iron ore adglutinate synergism combustion adjuvant is to be grouped into by one-tenth such as oxygen enriching burning-aid agent, gasification of coal incendiary material, catalyzer, solubility promoter, binding agent and stablizers, and the weight percent of its concrete moiety is: potassium permanganate 3-5%, SODIUMNITRATE 7-10%, ferrocene 2-5%, urotropine 5-10%, boric acid 10-20%, borax 40-50%, sodium-chlor 10-20%, polyvinyl alcohol 1% iron ore adglutinate synergism combustion adjuvant production technique
Select the stainless steel agitator for use, adding potassium permanganate, SODIUMNITRATE, ferrocene, urotropine, boric acid, borax, sodium-chlor, polyvinyl alcohol successively according to ingredient proportion packs then, packing can be according to the size of customer need and convenient transportation decision packing bag, the packing instructions sealing is accomplished waterproof and dampproof.
The iron ore adglutinate synergism combustion adjuvant using method
This product uses and can be divided into two kinds of dry method and wet methods.Under the situation that does not change SINTERING PRODUCTION technology, directly be added on the coke powder by blanking machine and get final product.In smelting sinter mixture with addition of ten thousand/, this product can make the smeltery reduce solid fuel consumption more than 15%, boosts productivity more than 5% simultaneously.
The iron ore adglutinate synergism combustion adjuvant result of use
1. reduction solid fuel consumption, the charcoal amount of joining in the sintered material is determining sintering temperature, atmosphere character and sintering velocity.Because of this product contains oxygenation, combustion-supporting material, therefore but solid-fuelled combustion velocity is accelerated in catalysis, particularly stronger to the katalysis of non-carbon species in the solid fuel, activate combustible element and solid-fuelled reactive behavior in the compound, add flammable, the combustion-supporting exothermic ingredient of agglutinant inherent brute force, bed of material total heat is increased greatly, and temperature raises, and solid burnup reduces relatively.
2. raising productivity of sintering machine
Vertical sintering speed is the important factor of decision output, and is proportional substantially with output.And vertical sintering speed is by the combustionvelocity of fuel and heat transfer rate decision, when joining the charcoal amount when suitable or higher, the sintering process general speed depends on the combustionvelocity of charcoal, combustionvelocity is directly proportional with oxygen supply intensity, oxygen enrichment ion in the agglutinant has been accelerated the combustionvelocity of carbon, improved efficiency of combustion, help making the ventilation property of ball granulation improvement bed of material simultaneously owing to the adding of agglutinant, heat transfer rate is accelerated, vertical sintering speed improves, output promotes, simultaneously, contain the reduction of powder, the raising of intensity is risen yield rate, the rate of return mine descends, the corresponding raising of output.
3. improve sinter strength and yield rate
Because the adding of toughener and stablizer has improved the quantity and the character that generate liquid phase.Increased the good glued phase of wettability, simultaneously, synergistic agent be incorporated as thick material, the low-carbon (LC) sintering has been created condition, helps low sintering smooth realization, makes that calcium ferrite content increases in the agglomerate, intensity is improved, yield rate rises.
4. reduce FeO content
The reduction of solid fuel consumption is the important factor that FeO content reduces, simultaneously because the adding of agglutinant has increased an amount of oxonium ion to sinter bed, alleviated near the oxygen supply deficiency of carbon granules, reduced CO concentration, reduced reducing atmosphere, strengthen and enlarged oxidizing atmosphere, suppress to have reduced the generation of FeO.
5. the inhibition sintering ore pulverization reduces the back powder rate
Sintering uses synergistic agent, guaranteeing under the sufficient condition of sintering heat, by reducing mixed carbon comtent, obtain lower sintering temperature (＜1280 ℃), under strong oxidizing atmosphere, can reduce the formation of calcium orthosilicate, SFCA is formed in a large number, in addition, because synergistic agent contains a certain proportion of boron, in sintering process, can form Solid solution with established 2CaO.SiO2 in the agglomerate, do not undergo phase transition in process of cooling thereby stablize β-2CaO.SiO2, the sintering ore pulverization phenomenon is inhibited, impel sinter strength to improve jointly, improve sintering finished rate, reduce the back powder rate.
6. improve pig iron output, reduce coke ratio
Because the adding of synergistic agent, the mineral composition and the microstructure of agglomerate have been improved, improved the metallurgical performance of agglomerate, the minimizing of the raising of intensity, blast furnace powder, improved the ventilation property of blast furnace, simultaneously, FeO reduces, reductibility improves, and all is that condition has been created in the increase of blast furnace iron output and the reduction of coke ratio.
7. sintering uses synergistic agent, can reduce the growing amount of SO2 in the sintered discharge gas, reduces topsoil.
The iron ore adglutinate synergism combustion adjuvant principle of work
By the proportioning room charging belt, to scale with addition of iron ore adglutinate synergism combustion adjuvant, can reach the reduction solid burnup, improve productivity of sintering machine, improve the good result of sinter quality and comprehensive economic index, its working mechanism is to be based upon on low-temperature sintering and the coal-fired gasifying combustion theoretical basis.
As everyone knows, the agglomerating main purpose is that the iron content powder sintering is become piece, and the enriched ore with certain particle size composition and good metallurgical performance is provided for blast-furnace smelting.Just produce a large amount of liquid phases by high temperature is bonded to piece with fine ore to traditional sintering method merely, not enough to the quality consciousness of bonding phase, often causes sinter strength relatively poor, and yield rate is lower, and smelting performance is also bad.And low-temperature sintering is by reducing the proportioning of carbon, make sintering process under lower temperature condition, form a large amount of compound calcium ferrites of needle-like (SFCA) as main bonding phase, great deal of experimental shows: SFCA has lower fusing point, higher-strength and good smelting performance.Its forming process is: during magnetite raw material sintering, C2S extensively generates at zone of combustion, the Fe2O3 recrystallize is grown up and the more Ca of solid solution, Mg, Al element, a small amount of high calcium calcium ferrite generates, to the high temperature oxidation band, Fe3O4 is oxidized to Fe2O3, generates calcium ferrite in a large number and develops into needle-like with C2S and CaO reaction.Rhombohedral iron ore raw material sintering, existing a certain amount of high calcium calcium ferrite generates in the preheating zone, at zone of combustion because liquid phase reaction, dissolve in more Ca, Mg, Al and silicate composition, the needle-like calcium ferrite develops rapidly, to the high temperature oxidation band, the Fe3O4 that part is reduced reoxidizes and is Fe2O3, and the needle-like calcium ferrite attains full development.Research shows that also the top condition that develops SFCA is: low temperature (1230～1250 ℃ of magnetite raw materials, 1250～1270 ℃ of rhombohedral iron ore), high basicity (CaO/SiO2=1.8～2.2), proper A l2O3/SiO2 (0.1-0.2), higher high temperature (1100 ℃) hold-time (2～3min).Under the general raw materials for sintering condition of China, Al2O3 and SiO2 content can meet the requirements, so low temperature, strong oxidizing atmosphere and high basicity are the necessary processing condition of development needle-like calcium ferrite.
Iron ore adglutinate synergism combustion adjuvant is made up of six parts such as coal-fired gasification agent, oxygenation agent, toughener, fusing assistant, cakingagent and ultrafine powder stablizers, every part is all brought into play extremely effectively sinter effect in SINTERING PRODUCTION: the oxygenation agent can be created strong oxidizing atmosphere for sintering process, for sintering operation develops the condition started to low-carbon (LC), thick bed of material direction, in high basicity sinter is produced, can realize low-temperature sintering, its result directly translates into the middle mutually SFCA of agglomerate bonding to be increased.The coal-fired gasification agent can have the catalytic combustion-supporting effect to solid-fuelled gasification, and combustion, under higher oxidizing atmosphere condition, the reactive behavior of sintering fuel (coke powder or coal dust) strengthens greatly, make that aphlogistic under normal operation combustiblematerials is burnt in the coal dust, excavated energy, the toughener that has iron ore adglutinate synergism combustion adjuvant to contain again also participates in the chemical heat release of sintering reaction, impels the reduction of sintering solid burnup jointly.Boron contained in the ultrafine powder stablizer can form Solid solution with C2S in the clinker mineral, does not undergo phase transition in process of cooling thereby stablize β-2CaO.SiO2, and the sintering ore pulverization phenomenon is inhibited, and has improved sinter strength and sintering finished rate.Sintering oxidation atmosphere strengthens, not only improved the combustionvelocity of fuel, also improved fuel combustion efficiency, inflammable gas in the combustion exhaust is reduced, the content of CO2 and H2O increases, so gas heat capacity increases the heat transfer rate quickening of gas, impel sintering velocity to accelerate, productivity of sintering machine improves.
Embodiment
Embodiment 1: sintering cup test
Iron ore adglutinate synergism combustion adjuvant moiety potassium permanganate 3%, SODIUMNITRATE 6%, ferrocene 3%, urotropine 6%, boric acid 15%, borax 45%, sodium-chlor 21%, polyvinyl alcohol 1%
The Datong coal is a fuel, and proportioning is 5% to get the mixing raw material 80kg that stirs do agglutinating test in base period.Above-mentioned raw materials is poured in the primary mixer; Fetch water and fully stir.Carry out the second time then and make ball 3mm in the mixing machine, do the blended relevant regulations, igniting sintering in the combustion knot cup of packing at last.After the combustion knot finishes, whole grain screening is carried out through secondary breaking in combustion knot ore deposit, do the detection of sintering technology index, it is constant to choose other proportion of raw materials in the in-test, and only the consumption with fuel reduces by 15%, the proportioning that is fuel is 4.25%, add intensified-sintered dose of mixing and stirring again, consumption is by ten thousand of raw material consumption/take the agglutinating test that repeating group is met the deadline, main solid-fuelled consumption of examination and volume increase situation, and compare its result and be:
Embodiment 2:
Use iron ore adglutinate synergism combustion adjuvant experiment situation in XiLin steel mill sintering mill (plant)
Choose Australian breeze 32.12%, the smart powder 44.94% of homemade iron, slaked lime 88.56%, ground dolomite 7.92%, return mine 6.46%, control the blanking amount by ratio of components by belted electronic balance, under the fuel weighing belt, prepare burden and iron ore adglutinate synergism combustion adjuvant (moiety and proportioning are with embodiment 1) blanking device and the smooth scraper of fuel have been installed on the big belt, and try one's best for iron ore adglutinate synergism combustion adjuvant and to contact more with fuel, we have also installed waterworks, to guarantee that iron ore adglutinate synergism combustion adjuvant is bonded on the fuel or to infiltrate in the coke powder pore that consumption is taken according to 0.1 ‰ of former combustion mixing of materials amount.Various raw materials are delivered to primary mixer through rotary conveyor and are added water-wet and be mixed, and then make ball through second drum mixer and granulate that evenly cloth is on sinter machine in the back, and the sintering of lighting a fire forms agglomerate at last.The coal blending amount is divided first day, second day, the 3rd day three phases in trial period, and the wet proportioning of this three phases coal is respectively 5.8%, 5.5%, 5.9%.Take the iron ore adglutinate synergism combustion adjuvant proportioning and be respectively 0.1 ‰, 0.1 ‰, 0.1 ‰.Test-results is as follows
Sintering is with addition of iron ore adglutinate synergism combustion adjuvant test front and back situation
Trial period,, the statistics proportioning of iron ore adglutinate synergism combustion adjuvant was 0.1 ‰, and solid fuel consumption reduces 9.9kg/t, and the reduction ratio is 15%, and productivity of sintering machine increases 0.031t/m
2H, tumbler index average out to 67.53%, than 53.7% raising 13.83% in base period, sintering mine FeO is 10.86% 12.88% reduction by 2.02% than the base period, containing the powder rate is 15.07%, than 18.08% reduction by 3.01% in base period.As can be seen, the wet proportioning of coal is when 5.8-5.9% from above table, and the tumbler index of agglomerate is higher, is 67.96%, than base period raising 14.26%
Claims (2)
1, iron ore adglutinate synergism combustion adjuvant is made up of following prescription:
Potassium permanganate 3-5%, SODIUMNITRATE 7-10%, ferrocene 2-5%, urotropine 5-10%, boric acid 10-20%, borax 40-50%, sodium-chlor 10-20%, polyvinyl alcohol 1%.
2, a kind of production claim 1 is described, and the iron ore adglutinate synergism combustion adjuvant production technique is:
Select the stainless steel agitator for use, adding potassium permanganate, SODIUMNITRATE, ferrocene, urotropine, boric acid, borax, sodium-chlor polyvinyl alcohol successively according to ingredient proportion packs then, packing can be according to the size of customer need and convenient transportation decision packing bag, the packing instructions sealing is accomplished waterproof and dampproof.
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| CN200710072006XA CN101285116B (en) | 2007-04-09 | 2007-04-09 | Iron ore adglutinate synergism combustion adjuvant and method for preparing same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103006A (en) * | 2013-01-25 | 2013-05-15 | 乌鲁木齐赛蒙德尔环保科技有限公司 | Coal burning catalyst as well as preparation and use method thereof |
| CN106244800A (en) * | 2016-09-18 | 2016-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The sintering method of high-Ti type V-Ti magnetite concentrate |
| CN108330275A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN109207231A (en) * | 2018-11-12 | 2019-01-15 | 山东东阿润生粘合剂有限公司 | A kind of coal-saving comburant improving efficiency of fire coal |
| CN110241305A (en) * | 2019-06-29 | 2019-09-17 | 日照大福粘合剂有限公司 | A kind of organic bond and its addition equipment for agglomerates of sintered pellets pelletizing |
| CN114657001A (en) * | 2022-03-30 | 2022-06-24 | 鞍钢股份有限公司 | Method for manufacturing composite fuel for sintering |
Family Cites Families (4)
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| CN1271780A (en) * | 1999-04-28 | 2000-11-01 | 才振东 | Series sinter additives |
| CN1743471A (en) * | 2004-09-03 | 2006-03-08 | 刘志伟 | Sintering-mineralizing energy-saving combustion adjuvant and its preparing method |
| CN1618994A (en) * | 2004-11-25 | 2005-05-25 | 张互助 | Fine iron ore agglomeration additive and its preparation method |
| CN100351397C (en) * | 2005-06-02 | 2007-11-28 | 中南大学 | Additive of agglomeration for iron mine |
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2007
- 2007-04-09 CN CN200710072006XA patent/CN101285116B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103006A (en) * | 2013-01-25 | 2013-05-15 | 乌鲁木齐赛蒙德尔环保科技有限公司 | Coal burning catalyst as well as preparation and use method thereof |
| CN103103006B (en) * | 2013-01-25 | 2014-04-30 | 乌鲁木齐赛蒙德尔环保科技有限公司 | Coal burning catalyst as well as preparation and use method thereof |
| CN106244800A (en) * | 2016-09-18 | 2016-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The sintering method of high-Ti type V-Ti magnetite concentrate |
| CN108330275A (en) * | 2018-02-13 | 2018-07-27 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN108330275B (en) * | 2018-02-13 | 2019-08-06 | 鞍钢股份有限公司 | Oxygen-enriched sintering production method for super-thick material layer |
| CN109207231A (en) * | 2018-11-12 | 2019-01-15 | 山东东阿润生粘合剂有限公司 | A kind of coal-saving comburant improving efficiency of fire coal |
| CN110241305A (en) * | 2019-06-29 | 2019-09-17 | 日照大福粘合剂有限公司 | A kind of organic bond and its addition equipment for agglomerates of sintered pellets pelletizing |
| CN114657001A (en) * | 2022-03-30 | 2022-06-24 | 鞍钢股份有限公司 | Method for manufacturing composite fuel for sintering |
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