CN104630460A - Sintering method for preparing iron ore powder - Google Patents
Sintering method for preparing iron ore powder Download PDFInfo
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- CN104630460A CN104630460A CN201510064556.1A CN201510064556A CN104630460A CN 104630460 A CN104630460 A CN 104630460A CN 201510064556 A CN201510064556 A CN 201510064556A CN 104630460 A CN104630460 A CN 104630460A
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- sintering
- iron ore
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- sinter
- powdered iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a sintering method for preparing iron ore powder, which comprises the following steps: (1) ore powder fine grinding: taking the iron ore powder, adding 3-5 wt% of water-based high polymer (on the basis of the ground phosphorite), 10-20 wt% of furfural slag, 0.3-0.5 wt% of gallic acid and 10-20 wt% of fly ash, uniformly mixing, and carrying out fine grinding; (2) preparing spherical particles; (3) sintering: coating a fuel layer on the surface of the spherical particles, adding into a sintering machine, and distributing the material with the height of 600-700mm, wherein an atomization sprayer is used in the sintering machine distribution process to add water to the sintering mixture, a small amount (5-6%) of water is matched for the middle and upper parts of the mixture layer on the sintering machine, and a large amount (7-8%) of water is matched for the lower part of the mixture layer; and drying, preheating, igniting, sintering into a thermal sintered ore, cooling, crushing and screening to obtain the finished sintered ore with the particle size of 10-20mm. The sintering method for preparing iron ore powder is simple in process; the iron ore powder is finely ground and activated to lower the reaction temperature; and the soakage method is adopted in the sintering process to enhance the sintered ore strength and sintered ore yield and save the solid fuel consumption.
Description
Technical field
The present invention relates to metallurgical technology field, particularly relate to a kind of sintering method preparing powdered iron ore.
Background technology
Furnace charge refers to the ore and other catalytic materials that add smelting furnace, and iron ore, steel billet, the pig iron, iron and steel scrap, breeze, coking coal, iron alloy all belong to furnace charge.Powdered iron ore is the one of furnace charge, the current method preparing powdered iron ore, there is solid fuel consumption high, the problem that sinter strength is poor, balling property is low, ventilation property does not reach blast furnace application requiring, yields poorly, in powdered iron ore fine grinding operation, powdered iron ore grindability is very poor, and fine particle is the group of connecing easily, needs to consume a large amount of energy and production time in grinding process, and in sintering circuit, after bed of material surface ignition, along with the process of sintering, the heat that in compound, solid fuel ignition produces shifts from bed of material top lower portion, material layer temperature presents the trend progressively improved from top to bottom, the auto accumulation heat effect of fuel concentrated combustion and sintering ore bed, more down temperature is higher to make the bed of material, heat is more, thermal zone wider, therefore sintering process is an anisothermal process, and the quality of thickness to sintering process and quality product of top temperature travelling speed in sinter bed and zone of combustion has a great impact, after such as the bed of material thickens, solid fuel consumption reduces relatively, the sintering top bed of material causes sinter strength to be deteriorated because of shortage of heat, decrease in yield, finished product agglomerate heterogeneity, production system sinter return rate increases, worsen sintering process conditions etc.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of sintering method preparing powdered iron ore is provided, processing method is simple, easy to operate, by fine grinding powdered iron ore and activation powdered iron ore, reduce its temperature of reaction, in sintering circuit, adopt soaking method, improve sinter strength and Sintering Yield, save solid fuel consumption.
The present invention adopts following technical scheme to achieve these goals:
Prepare a sintering method for powdered iron ore, comprise the following steps:
(1) breeze fine grinding: get powdered iron ore, add the aqueous high molecular of its weight 3-5%, the furfural dregs of 10-20%, the gallic acid of 0.3-0.5%, the flyash of 10-20%, mix, then carrying out the content that fine grinding is less than 0.044mm to granularity is 50-80%, specific surface area 1600-1800cm
2/ g;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the described caking agent of compound weight 2.3-3.5%, the fuel of 6.5-7.5%, Homogeneous phase mixing, add water-wet, control pelletizing moisture 7.5-8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 3-5mm;
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600-700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5-6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7-8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains the finished product agglomerate that granularity is 10-20mm.
Furfural dregs described in step (1) take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural.
Caking agent described in step (2) is made up of the component of following weight percent: calcium oxide 15-50%, carboxymethyl cellulose 5-20%, silica 1-10%, potter's clay 5-30%, water glass 15-30%.
Fuel described in step (2) is one or both in coke powder, hard coal.
Compared with the prior art, beneficial effect of the present invention is as follows:
(1) sintering method of preparation powdered iron ore of the present invention, processing method is simple, easy to operate, by fine grinding powdered iron ore and activation powdered iron ore, reduce its temperature of reaction, in sintering circuit, adopt soaking method, improve sinter strength and Sintering Yield, save solid fuel consumption.
(2) powdered iron ore is first carried out fine grinding process by the present invention, with regard to iron ore fines level content and specific surface area, improve its balling property, green ball strength and thermostability is improved again by adding caking agent, divided by pellet forming process and fuel and add technique, improve the ventilation property of the bed of material on sinter machine, improve the combustion conditions of fuel, the advantage of pelletizing process and sintering process is combined, iron ore sintering mine is by solid phase consolidation and liquid phase is bonding combines, the consolidation in intensified-sintered ore deposit, therefore, sinter strength and output increase substantially, and energy consumption obviously reduces; The caking agent used adopts organic and inorganic mixing, improves pellet ferrous grade and reductibility, strengthens the intensity of pellet, reduces the impurity level introduced.
(3) the present invention adds the breeze additives such as aqueous high molecular, furfural dregs, gallic acid and flyash in the powdered iron ore fine grinding stage, has significant grinding-aid effect, effectively excites breeze active, reduces its temperature of reaction.
(4) the present invention is in sintering circuit, by adopting uniform heating process, in stub bar, bottom, the uniform atomized water of surface sprinkling before roasting, improve the bulk density of compound in sinter bed, improve solid fuel and hot gas flow conduction efficiency, solve that material layer lower part auto accumulation heat temperature in deep bed sintering is too high, fuel and water dispenser ratio are difficult to uniform temperature in sintering top shortage of heat and the bed of material, make powdered iron ore soaking, improve the seed output and quality of agglomerate, save solid fuel consumption.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited only to these embodiments, and under the prerequisite not departing from present inventive concept, any improvement done all drops within protection scope of the present invention.
Embodiment 1:
A kind of sintering method preparing powdered iron ore, get powdered iron ore, add the aqueous high molecular of its weight 3%, 20% furfural dregs, the gallic acid of 0.3%, the flyash of 10%, mix, then carrying out the content that fine grinding is less than 0.044mm to granularity is 50%, specific surface area 1600cm
2/ g, get the compound of fine grinding, add the described caking agent of compound weight 2.3%, the coke powder of 6.5%, Homogeneous phase mixing, adds water-wet, controls pelletizing moisture 7.5%, and then by pelletizer pelletizing, spherolite Task-size Controlling is at 3mm, described caking agent is made up of the component of following weight percent: calcium oxide 15%, carboxymethyl cellulose 20%, silica 1 %, potter's clay 50%, water glass 15%, the pellet surface of gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains the finished product agglomerate that granularity is 10mm.
Embodiment 2:
A kind of sintering method preparing powdered iron ore, get powdered iron ore, add the aqueous high molecular of its weight 4%, 15% furfural dregs, the gallic acid of 0.4%, the flyash of 15%, mix, then carrying out the content that fine grinding is less than 0.044mm to granularity is 60%, specific surface area 1700cm
2/ g, described furfural dregs take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural, get the compound of fine grinding, add the described caking agent of compound weight 3.0%, the hard coal of 7.0%, Homogeneous phase mixing, adds water-wet, controls pelletizing moisture 8.0%, and then by pelletizer pelletizing, spherolite Task-size Controlling is at 5mm, described caking agent is made up of the component of following weight percent: calcium oxide 30%, carboxymethyl cellulose 15%, silicon-dioxide 5%, potter's clay 15%, water glass 20%, the pellet surface of gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 650mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains the finished product agglomerate that granularity is 20mm.
Embodiment 3:
A kind of sintering method preparing powdered iron ore, get powdered iron ore, add the aqueous high molecular of its weight 5%, 10% furfural dregs, the gallic acid of 0.5%, the flyash of 20%, mix, then carrying out the content that fine grinding is less than 0.044mm to granularity is 80%, specific surface area 1800cm
2/ g; Get the compound of fine grinding, add the described caking agent of compound weight 3.5%, the coke powder of 7.5%, Homogeneous phase mixing, adds water-wet, controls pelletizing moisture 8.5%, and then by pelletizer pelletizing, spherolite Task-size Controlling is at 5mm; Described caking agent is made up of the component of following weight percent: calcium oxide 50%, carboxymethyl cellulose 5%, silica 1 0%, potter's clay 5%, water glass 30%.The pellet surface of gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains the finished product agglomerate that granularity is 20mm.
Claims (4)
1. prepare a sintering method for powdered iron ore, it is characterized in that: comprise the following steps:
(1) breeze fine grinding: get powdered iron ore, add the aqueous high molecular of its weight 3-5%, the furfural dregs of 10-20%, the gallic acid of 0.3-0.5%, the flyash of 10-20%, mix, then carrying out the content that fine grinding is less than 0.044mm to granularity is 50-80%, specific surface area 1600-1800cm
2/ g;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the described caking agent of compound weight 2.3-3.5%, the fuel of 6.5-7.5%, Homogeneous phase mixing, add water-wet, control pelletizing moisture 7.5-8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 3-5mm;
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600-700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5-6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7-8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains the finished product agglomerate that granularity is 10-20mm.
2. the sintering method of preparation powdered iron ore according to claim 1, is characterized in that: the furfural dregs described in step (1) take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural.
3. the sintering method of preparation powdered iron ore according to claim 1, is characterized in that: the caking agent described in step (2) is made up of the component of following weight percent: calcium oxide 15-50%, carboxymethyl cellulose 5-20%, silica 1-10%, potter's clay 5-30%, water glass 15-30%.
4. the sintering method of preparation powdered iron ore according to claim 1, is characterized in that: the fuel described in step (2) is one or both in coke powder, hard coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064556.1A CN104630460A (en) | 2015-02-06 | 2015-02-06 | Sintering method for preparing iron ore powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064556.1A CN104630460A (en) | 2015-02-06 | 2015-02-06 | Sintering method for preparing iron ore powder |
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| CN104630460A true CN104630460A (en) | 2015-05-20 |
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| CN201510064556.1A Pending CN104630460A (en) | 2015-02-06 | 2015-02-06 | Sintering method for preparing iron ore powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714105A (en) * | 2016-02-26 | 2016-06-29 | 铜陵安东铸钢有限责任公司 | High-temperature sintering technology for nickel mineral powder |
| CN108754132A (en) * | 2018-06-14 | 2018-11-06 | 鞍钢股份有限公司 | A method of improving Metallurgical Properties of Sinter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004018716A1 (en) * | 2002-08-21 | 2004-03-04 | Nippon Steel Corporation | Method of granulating sintering material for iron manufacturing |
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN102965077A (en) * | 2012-11-23 | 2013-03-13 | 东南大学 | Powdered ore additive |
| CN103074487A (en) * | 2013-01-09 | 2013-05-01 | 承德石油高等专科学校 | Iron ore cooled agglomerated pellet binder |
-
2015
- 2015-02-06 CN CN201510064556.1A patent/CN104630460A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004018716A1 (en) * | 2002-08-21 | 2004-03-04 | Nippon Steel Corporation | Method of granulating sintering material for iron manufacturing |
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN102965077A (en) * | 2012-11-23 | 2013-03-13 | 东南大学 | Powdered ore additive |
| CN103074487A (en) * | 2013-01-09 | 2013-05-01 | 承德石油高等专科学校 | Iron ore cooled agglomerated pellet binder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714105A (en) * | 2016-02-26 | 2016-06-29 | 铜陵安东铸钢有限责任公司 | High-temperature sintering technology for nickel mineral powder |
| CN108754132A (en) * | 2018-06-14 | 2018-11-06 | 鞍钢股份有限公司 | A method of improving Metallurgical Properties of Sinter |
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Application publication date: 20150520 |
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