CN101928823A - Sintering method of iron ore powder with high content of crystal water - Google Patents
Sintering method of iron ore powder with high content of crystal water Download PDFInfo
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- CN101928823A CN101928823A CN2009100122277A CN200910012227A CN101928823A CN 101928823 A CN101928823 A CN 101928823A CN 2009100122277 A CN2009100122277 A CN 2009100122277A CN 200910012227 A CN200910012227 A CN 200910012227A CN 101928823 A CN101928823 A CN 101928823A
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Abstract
The invention provides a sintering method of iron ore powder with high content of crystal water, which comprises the following steps of blending, mixing, pelletizing, distributing and sintering materials. The sintering method is characterized in that the iron ore powder with high content of the crystal water is mixed with other various iron materials, limestone, calcium oxide, magnesium hydroxide, coke powder and the like according to the set components of sintering ore, and then the obtained mixed materials are distributed and pelletized at the lower part of a sintering trolley; and other various iron materials, limestone, calcium oxide, magnesium hydroxide, coke powder and the like are mixed together according to the set components of the sintering ore, and then the obtained mixed materials are distributed and pelletized at the upper part of the sintering trolley. In the method, the iron ore powder with high content of the crystal water is taken as a part of the iron materials to produce the sintering ore, thus preventing reduction of strength and sintering yield of the sintering ore, lowering solid fuel consumption, and facilitating effective utilization of iron ore resources with high content of the crystal water. A test shows that the sintering method is used to carry out distribution in a layering manner, thus drum strength of the sintering ore can be improved by 0.66%, solid fuel consumption can be reduced by 1.62kg/t, and yield rate can be increased by 4.51%.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, relate in particular to the production of blast furnace ironmaking with agglomerate.
Background technology
In metallurgical production, sintering has formed one important cell processes and has occupied suitable critical role, the ratio of agglomerate reaches about 70% in the iron-containing charge of China's blast furnace, in order to stablize and carry out expeditiously blast furnace operation, need high-quality agglomerate, thereby its economic and technical norms are had strict requirement.In addition, for reducing the agglomerate manufacturing cost, agglomerate product qualified rate, sintering utilization coefficient, sinter strength and sintering solid fuel consumption also all there is strict requirement.
Existing agglomerate production technology adopts following method: will be used for all iron-bearing materials of agglomerating and Wingdale, unslaked lime and coke powder, and deliver to mixing machine after cooperating in the ratio of calculating and carry out mixing and granulation; Mixed compound is taped against the sintering of lighting a fire on the pallet by distributor, and the finished product agglomerate is sent to blast-furnace smelting.
Be used for the agglomerating iron-bearing material and mainly contain rhombohedral iron ore (Fe
2O
3) and magnetite (Fe
3O
4) etc.Along with the minimizing of these high-quality iron ore output, increased gradually in recent years containing the high crystal water powdered iron ore (Fe of (containing the crystal water more than 9%)
2O
3NH
2O) usage quantity.Because the characteristics of high crystal water powdered iron ore are to contain the volume crystal water, void content height after normal temperature and heating, the short texture porous, bulk density is little, if so as a large amount of uses of raw materials for sintering then there is following problems: (1) sintering velocity is slow, and the sintering utilization coefficient is low; (2) sinter cake tissue looseness, amount of powder increases, and yield rate and intensity are low; (3) crystal water height, solid fuel consumption height in the sintering process mainly is not obtain the cause of replenishing because crystal water decomposes the hear rate increased.
For using these iron ores in a large number, people have proposed various technical solutions, but all adopt conventional cloth sintering method all the time.For carrying out SINTERING PRODUCTION with high crystal water iron ore, many valuable experiences have been summed up by other countries and some domestic manufacturers.For example: on the 5th phase of May in 2003, the paper that Jinan Iron ﹠ Steel Group Corp technique center Liu Zhen woods etc. is write " limonite sintering state-of-the-art both at home and abroad " mentions that French iron and steel research institute once studied in great detail the geographic high crystal water iron ore in French Lorraine (limonite) " China is metallurgical ".Test-results is as follows: (1) improves bed thickness, and quantity of return mines increases, and then output descends, but under the situation of different bed thickness, along with the increase of quantity of return mines, the output fall is identical.(2) bed thickness improves, and quantity of return mines increases, and solid fuel consumption is raise.(3) adopt high heat supply hot spot firearm to help to reduce the solid fuel consumption.(4) utilize the waste heat in the sintering process to carry out the sinter mixture preheating, help reducing the solid fuel consumption, and can improve output and improve cold strength.
Some Steel Plant of China have also all carried out high crystal water iron ore (limonite) SINTERING PRODUCTION, with the result of study of French iron and steel research institute many similarities are arranged.The experience of Shaoguan Iron ﹠ Steel Plant's limonite sintering is as follows: (1) is fit to produce high basicity sinter with limonite, and its basicity is advisable between 2.0～2.6.(2) limonite is fit to the high-moisture sintering, and mixture moisture about 10% is advisable.(3) utilize hot returning ore that mixture temperature is reached more than 55 ℃.(4) thick bed of material operation helps improving sinter quality and cuts down the consumption of energy, and bed thickness is that 450mm is advisable.(5) carry out SINTERING PRODUCTION with limonite, its energy loss-rate is with the high 27kg of magnetite (standard coal)/t, by utilizing waste heat, transformation lighter for ignition and reduction air leak rate of air curtain etc. capable of reducing energy consumption.
In aforesaid method, to high crystal water powdered iron ore effectively utilize effect remarkable not to the utmost, directly influence the manufacturing cost of agglomerate.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing in prior technology problem, a kind of sintering method that contains high crystal water powdered iron ore that can reduce solid fuel consumption, improve sinter quality is provided.
The sintering method that the present invention contains high crystal water powdered iron ore comprises batching, mixing granulation, cloth and sintering, be characterized in high crystal water powdered iron ore and other various iron charges, Wingdale, unslaked lime, magnesite and coke powder etc. are carried out batch mixing by the agglomerate set component, granulate, and be distributed in the bottom of pallet; Other various iron charges, Wingdale, unslaked lime, magnesite and coke powder etc. are advanced batch mixing by the agglomerate set component, granulate, and be distributed in the top of pallet.The sintered material that formation contains high crystal water powdered iron ore under layer-by-layer distribution.
The described high crystal water powdered iron ore of sintering method that the present invention contains high crystal water powdered iron ore accounts for 20%～60% of various iron charge gross weights; Described other various iron charges can be fine iron breeze, rich ore powder, blast furnace dirt, the assorted material of iron content etc.
In sintering process, the zone of combustion in the sinter bed is temperature highest region territory, and its temperature levels depends primarily on the solid fuel ignition liberated heat, and the while is relevant with the degree that air is preheated on top.And in sintering process, along with zone of combustion moves down, because upper strata sintering ore bed has " auto accumulation heat " effect, top temperature raises gradually." auto accumulation heat " effect of upper strata sintering ore bed can provide 35%～45% of zone of combustion total heat, so the top temperature of zone of combustion raises from top to bottom gradually along bed depth.Downwards, the high-temperature zone is thicker, causes the phenomenon of sinter quality inequality serious, the upper strata intensity difference, and lower floor's reductibility is bad.
Because the eliminating of crystal water in sintering process of high crystal water powdered iron ore needs heat absorption, need higher solid fuel consumption in the sintering process, the present invention with high crystal water powdered iron ore cloth in the sinter bed bottom, that part of heat that can effectively utilize " auto accumulation heat " effect to be produced, this heat provide the hear rate that is increased because of the crystal water decomposition not obtain the heat of replenishing; Because crystal water divides heat of desorption also to help the temperature decline of bed of material high-temperature zone, bottom, whole material layer temperature is tending towards evenly, thereby it is even to help sinter quality simultaneously.
In addition, high crystal water powdered iron ore is Well-recovered, and temperature of fusion is low, easily assimilation.The reductibility that its cloth is also helped improving agglomerate lower floor at material layer lower part.
The present invention produces agglomerate with high crystal water powdered iron ore as the part of iron charge, can prevent that sinter strength from descending and the sintering productive rate reduces, and also can reduce solid fuel consumption; In addition, also help effective utilization of high crystal water iron ore resource.Sintering cup test result in chamber shows by experiment: adopt the layer-by-layer distribution of the high crystal water powdered iron ore of the present invention, sintered ore rotary drum strength can improve 0.66 percentage point, and solid burnup reduces 1.62kg/t, and yield rate improves 4.51 percentage points.
Description of drawings
Accompanying drawing 1 is existing sintering process cloth synoptic diagram.
Accompanying drawing 2 is an embodiment of the invention technology cloth synoptic diagram.
1 is sintered cup among the figure; 2 is other iron charge compound; 3 for containing high crystal water powdered iron ore compound; 4 is the homogeneous compound; 5 are grate-layer material.
Embodiment
The invention will be further described by embodiment below in conjunction with accompanying drawing.
The embodiment of the invention is an example with the sintered cup cloth simultaneous test of existing distributing process and technical solution of the present invention, can obtain positive effect of the present invention by simultaneous test.
The iron charge proportioning of existing distributing process and technical solution of the present invention sees Table 1, and the crude fuel composition sees Table 2, and the sintering cup test condition sees Table 3.
Table 1 agglutinating test iron charge proportioning (wt%)
Table 2 crude fuel chemical ingredients (wt%)
Table 3 sintering cup test condition
Among the embodiment 1 be that 35% high crystal water powdered iron ore and other iron charge (as fine iron breeze, rich ore powder, blast furnace dirt, the assorted material of iron content etc.), Wingdale, unslaked lime, magnesite and coke powder etc. carry out batch mixing by the agglomerate set component with proportioning, the weight of this compound 3 accounts for 1/2 of whole compound weight, is distributed in the bottom (see Table 1 and Fig. 2) of sintered cup 1; Other iron charge, Wingdale, unslaked lime, magnesite and coke powder etc. also carry out batch mixing by identical agglomerate set component, and the weight of this compound 2 accounts for 1/2 of whole compound weight, is distributed in the top of sintered cup 1, promptly contain high crystal water powdered iron ore compound 3 above.Then, the sintering of lighting a fire.Two kinds of distributing mode agglomerating the key technical indexes are relatively referring to table 4.
The sintering the key technical indexes of table 4 embodiment 1 relatively
Among the embodiment 2 be that 40% high crystal water powdered iron ore and other iron charge, Wingdale, unslaked lime, magnesite and coke powder etc. carry out batch mixing by the agglomerate set component with proportioning, the weight of this compound 3 accounts for 2/5 of whole compound weight, is distributed in the bottom of sintered cup 1; Other iron charge, Wingdale, unslaked lime, magnesite and coke powder etc. also carry out batch mixing by identical agglomerate set component, and the weight of this compound 2 accounts for 3/5 of whole compound weight, is distributed in the top of sintered cup 1, promptly compound 3 above.The sintering of lighting a fire after cloth is finished.Two kinds of distributing mode sintering the key technical indexes are relatively referring to table 5.
Can adopt two the mixing and cloth system in the sintering method actual production of the present invention.Specifically, handle high crystal water powdered iron ore, deliver to mixer after itself and other fine iron breeze, rich ore powder, blast furnace dirt, the assorted material of iron content etc. are cooperated in the ratio of calculating with Wingdale, unslaked lime, coke powder etc. and carry out mixing and granulation with a mixing system.Another mixing system is handled other iron charge, with its with deliver to mixer after Wingdale, unslaked lime, coke powder etc. cooperate in the ratio of calculating and carry out mixing and granulation.The compound that contains high crystal water powdered iron ore 3 that to be handled well earlier by distributor is taped against the bottom of pallet then, and the compound 2 of other iron charge that will handle well is taped against the top of pallet again, also be compound 3 above.Form the layer-by-layer distribution of different iron charges thus.The sintering of lighting a fire at last.
Claims (3)
1. sintering method that contains high crystal water powdered iron ore, comprise batching, mixing granulation, cloth and sintering, it is characterized in that high crystal water powdered iron ore and other various iron charges, Wingdale, unslaked lime, magnesite and coke powder etc. are carried out batch mixing by the agglomerate set component, granulate, be distributed in the pallet bottom; Other various iron charges, Wingdale, unslaked lime, magnesite and coke powder etc. are carried out batch mixing by the agglomerate set component, granulate, be distributed in pallet top.
2. sintering method according to claim 1 is characterized in that described high crystal water powdered iron ore accounts for 20%～60% of various iron charge gross weights.
3. sintering method according to claim 1 is characterized in that described other various iron charges are fine iron breeze, rich ore powder, blast furnace dirt, the assorted material of iron content.
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Cited By (14)
| 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 |
| CN102925674A (en) * | 2011-08-12 | 2013-02-13 | 中国钢铁股份有限公司 | Method for increasing output of sintering process |
| CN103472787A (en) * | 2013-09-07 | 2013-12-25 | 鞍钢股份有限公司 | Method for on-line judging of sintering fuel ratio |
| CN104419824A (en) * | 2013-09-05 | 2015-03-18 | 鞍钢股份有限公司 | Material distribution method for producing pre-reduced agglomerate |
| CN105274269A (en) * | 2014-07-22 | 2016-01-27 | 宝山钢铁股份有限公司 | Sintering mixed material distribution method |
| CN105714103A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for producing sintering ore with iron ore concentrate as main iron materials |
| CN106350665A (en) * | 2016-09-12 | 2017-01-25 | 鞍钢股份有限公司 | Ultra-thick bed sintering method for reducing sinter return ratio and employing presintering |
| CN106702145A (en) * | 2015-07-21 | 2017-05-24 | 宝山钢铁股份有限公司 | Method for intensifying sintering of limonite with high content of crystal water |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN109182735A (en) * | 2018-11-17 | 2019-01-11 | 武钢集团昆明钢铁股份有限公司 | Highly crystalline water limonite sintering method |
| CN110283992A (en) * | 2019-07-20 | 2019-09-27 | 武钢集团昆明钢铁股份有限公司 | A kind of high mixture ratio limonite sintering method |
| CN111172385A (en) * | 2020-01-20 | 2020-05-19 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by using high-crystallization-water iron ore powder |
| CN111595718A (en) * | 2020-04-24 | 2020-08-28 | 河钢股份有限公司 | Test method for detecting coke mixing thermal property by using coke reactivity measuring device |
| CN115181851A (en) * | 2022-06-28 | 2022-10-14 | 鞍钢股份有限公司 | Method for preparing sintered ore from high-crystal-water iron ore powder |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925674A (en) * | 2011-08-12 | 2013-02-13 | 中国钢铁股份有限公司 | Method for increasing output of sintering process |
| CN102899482B (en) * | 2012-10-09 | 2014-03-12 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN104419824A (en) * | 2013-09-05 | 2015-03-18 | 鞍钢股份有限公司 | Material distribution method for producing pre-reduced agglomerate |
| CN103472787B (en) * | 2013-09-07 | 2016-06-01 | 鞍钢股份有限公司 | A kind of online decision method of sintering fuel proportioning |
| CN103472787A (en) * | 2013-09-07 | 2013-12-25 | 鞍钢股份有限公司 | Method for on-line judging of sintering fuel ratio |
| CN105274269B (en) * | 2014-07-22 | 2017-07-28 | 宝山钢铁股份有限公司 | A kind of distributing method of sinter mixture |
| CN105274269A (en) * | 2014-07-22 | 2016-01-27 | 宝山钢铁股份有限公司 | Sintering mixed material distribution method |
| CN105714103A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for producing sintering ore with iron ore concentrate as main iron materials |
| CN106702145A (en) * | 2015-07-21 | 2017-05-24 | 宝山钢铁股份有限公司 | Method for intensifying sintering of limonite with high content of crystal water |
| CN106702145B (en) * | 2015-07-21 | 2018-10-02 | 宝山钢铁股份有限公司 | A method of strengthening highly crystalline water limonite sintering |
| CN106350665B (en) * | 2016-09-12 | 2018-12-04 | 鞍钢股份有限公司 | A kind of super thick bed of material sintering method using pre-sintering reducing sinter return fine rate |
| CN106350665A (en) * | 2016-09-12 | 2017-01-25 | 鞍钢股份有限公司 | Ultra-thick bed sintering method for reducing sinter return ratio and employing presintering |
| CN107782760B (en) * | 2017-10-20 | 2019-09-24 | 武汉钢铁有限公司 | The test method of high furnace charge melting Performance Match degree |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN109182735A (en) * | 2018-11-17 | 2019-01-11 | 武钢集团昆明钢铁股份有限公司 | Highly crystalline water limonite sintering method |
| CN110283992A (en) * | 2019-07-20 | 2019-09-27 | 武钢集团昆明钢铁股份有限公司 | A kind of high mixture ratio limonite sintering method |
| CN110283992B (en) * | 2019-07-20 | 2021-04-06 | 武钢集团昆明钢铁股份有限公司 | High-proportion limonite sintering method |
| CN111172385A (en) * | 2020-01-20 | 2020-05-19 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by using high-crystallization-water iron ore powder |
| CN111172385B (en) * | 2020-01-20 | 2022-04-08 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by using high-crystallization-water iron ore powder |
| CN111595718A (en) * | 2020-04-24 | 2020-08-28 | 河钢股份有限公司 | Test method for detecting coke mixing thermal property by using coke reactivity measuring device |
| CN115181851A (en) * | 2022-06-28 | 2022-10-14 | 鞍钢股份有限公司 | Method for preparing sintered ore from high-crystal-water iron ore powder |
| CN115181851B (en) * | 2022-06-28 | 2023-06-16 | 鞍钢股份有限公司 | Method for preparing sinter from high-crystallization water iron ore powder |
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Application publication date: 20101229 |