WO2019174241A1 - 一种铁矿石微波烧结方法 - Google Patents

一种铁矿石微波烧结方法 Download PDF

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Publication number
WO2019174241A1
WO2019174241A1 PCT/CN2018/112043 CN2018112043W WO2019174241A1 WO 2019174241 A1 WO2019174241 A1 WO 2019174241A1 CN 2018112043 W CN2018112043 W CN 2018112043W WO 2019174241 A1 WO2019174241 A1 WO 2019174241A1
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WO
WIPO (PCT)
Prior art keywords
section
cooling
sintering
iron ore
microwave
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PCT/CN2018/112043
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English (en)
French (fr)
Chinese (zh)
Inventor
毛晓明
熊林
齐伟
李建
沈红标
Original Assignee
宝山钢铁股份有限公司
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Application filed by 宝山钢铁股份有限公司 filed Critical 宝山钢铁股份有限公司
Priority to JP2020544203A priority Critical patent/JP6994579B2/ja
Priority to DE112018007266.5T priority patent/DE112018007266B4/de
Priority to KR1020207024964A priority patent/KR102488023B1/ko
Publication of WO2019174241A1 publication Critical patent/WO2019174241A1/zh

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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
    • 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
    • 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
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • 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
    • C22B1/26—Cooling of roasted, sintered, or agglomerated ores
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/04—Specific shape of slag after cooling

Definitions

  • the invention belongs to a sintering process, in particular to an iron ore microwave sintering method.
  • the iron and steel industry is a big consumer of energy consumption.
  • the energy consumption of China's steel industry accounts for about 10% of the total domestic energy consumption.
  • the rapid development of China's steel industry has not only consumed a lot of energy, but also caused serious damage to the environment.
  • the sintering process accounts for 10%-15% of the total energy consumption of steel production. Since 80%-90% of the energy consumption of sintering energy is solid fuel consumption and ignition energy consumption, a large number of SO2, NOx, CO2 and carcinogenic substances such as dioxins, of which SO2 emissions account for about 33% of the entire steel industry, seriously restricting the sustainable development of the steel industry. Reducing the emission of pollutants in the sintering process has become the key research direction of relevant practitioners. At present, the technical methods adopted at home and abroad are mainly to reduce the solid fuel consumption and the end treatment of sintering flue gas.
  • Chinese patent ZL201610590727.9 discloses a method for sintering and spraying a combustible gas, which reduces the carbon content in the sintering mixture, and simultaneously sprays a flammable gas, a combustible gas and a sintering mixture on the surface of the sintering mixture.
  • the air above the surface is mixed to form a low-concentration flammable gas.
  • a low-concentration flammable gas is sucked into the sintering mixture, and a low-concentration flammable gas participates in the sintering reaction in the sinter layer, and oxidizes the exotherm into the layer.
  • Chinese patent ZL201310437562.8 discloses an activated carbon flue gas desulfurization and regeneration device and a method, the activated carbon flue gas desulfurization and regeneration device comprises a plurality of activated carbon channels and a temperature control system provided in the tower body and the tower body. The purpose of removing most of the sulfur oxides in the sintered flue gas can be achieved.
  • Chinese patent ZL201310325274.3 discloses a dry desulfurization method, which comprises: the original flue gas enters the reaction tower, and the desulfurization absorbent and the synergistic additive are added to the reaction tower to be mixed with the flue gas, and the net fumes after desulfurization are obtained after the reaction. Gas can significantly remove sulfur dioxide from flue gas and improve overall desulfurization efficiency.
  • the technical problem to be solved by the present invention is to provide an iron ore microwave sintering method, which can reduce the exhaust gas and pollutant emission in the sintering process to a level close to zero by using microwave heating iron ore and flue gas recycling, and at the same time improve Sinter strength, yield, average particle size.
  • An iron ore microwave sintering method comprising the following steps:
  • the iron ore, the flux, the returning ore and the iron-containing solid waste are compounded according to the set sinter composition, and are mixed and granulated and then transported to the mixing bin;
  • the sintering trolley filled with the mixture is sequentially preheated, preheated in two stages, microwave heating section, microwave sintering section, cooling section, cooling section and cooling section, so that the mixture is preheated, heated, Mineralization after sintering and cooling;
  • the flux is at least one of limestone, dolomite, quicklime and serpentine, and the amount of quicklime ranges from 0 to 4%.
  • the mixed granulation method is intensive mixing granulation/intensive mixing and cylindrical granulation/two-stage cylinder mixing granulation, and the moisture in the mixed granulation mixture is 4 to 7.5%. .
  • the primer is a mixture of sinter/iron ore/sinter and iron ore.
  • step 3 the preheating section, the preheating section, the microwave heating section, the microwave sintering section, the cooling section, the cooling section, and the adjacent two sections of the cooling section are partitioned by a heat insulating material.
  • the preheating section of the heat source uses preheating two sections of hot flue gas, the mixture is preheated to 150-250 ° C in the preheating section; the preheating second section of the heat source uses the mixed microwave
  • the heating section, the cooling section and the cooling section 2 of the hot flue gas are preheated to 350-600 ° C in the preheating section.
  • the microwave heating section of the microwave heating section and the microwave sintering section are uniformly installed on the upper part and the two sides, and the microwave heating section further heats the temperature of the preheated mixture to 1220-1350 ° C, and the microwave sintering section The mixture was incubated at 1220-1350 ° C for 5-10 min.
  • the microwave heating section By inputting a section of hot flue gas in the microwave heating section, and the microwave heating section suction negative pressure is lower than the preheating section and the preheating section, to ensure the gas generated by the decomposition of the flux and the oxygen entering the mixture layer of the microwave sintering section.
  • the content is not less than 10%.
  • the cooling section, the cooling section and the cooling section are cascade-cooled, and the cooling gas for cooling is 50-80% of the cooling two-stage hot flue gas, and the cooling gas of the second section is cooled.
  • the cooling gas for cooling is 50-80% of the cooling two-stage hot flue gas
  • the cooling gas of the second section is cooled.
  • the cooling three-stage cooling gas adopts a preheating section of the exhaust gas after dedusting and dehumidification, and when the sinter temperature after the three stages of cooling is greater than 150 ° C, the supplementary partial cooling gas is used to ensure Cooling effect.
  • step 3 after the preheating section of the flue gas meets the requirement of cooling the three-stage gas volume, the excess flue gas is discharged after being dusted.
  • the sintering ignition device may not be required, thereby eliminating the use of gaseous fuel and avoiding the formation of thermal nitrogen oxides during ignition.
  • Figure 1 is a schematic view of the iron ore microwave sintering method of the present invention
  • the method for microwave sintering of iron ore according to the present invention specifically comprises the following steps:
  • the iron ore, flux, returning or iron-containing solid waste is compounded according to the set sinter composition, mixed and granulated by the mixing granulation device 1 and then transported to the mixing bin 3;
  • the sintering trolley filled with the mixed material is sequentially preheated for one stage, preheated two stages, microwave heating section, microwave sintering section, cooling section, cooling section and cooling section according to the set moving speed, so that the mixture is mixed.
  • the process of recycling the flue gas in the above step 3) is: the majority of the flue gas and the supplemental air in the preheating period are dedusted and dehumidified and mixed by the cyclone dust dehumidifier 9 and then blown into the cooling three sections by the blower 8.
  • the three sections of hot flue gas are cooled by the blower 7 into the cooling section.
  • the hot flue gas for cooling the second stage is divided into two paths, one of which is blown into the cooling section by the blower 10, and the other is sent to the gas mixer 4 via the blower 6.
  • the hot flue gas which is cooled for a section is also divided into two paths, one is directly sent to the gas mixer 4, and the other is sent to the microwave heating section, and the hot flue gas of the microwave heating section is sent to the gas mixer 4 through the exhaust fan 14.
  • the oxygen content measured by the microwave sintering section oxygen detecting device 5 is less than 10%, the proportion of the hot flue gas cooled to the microwave heating section is increased.
  • the hot flue gas from the cooling section, the cooling section and the microwave heating section is mixed in the gas mixer 4 and sent to the preheating section.
  • the preheating two-stage hot flue gas is sent to the preheating section by the exhaust fan 11, and after preheating a section of flue gas to meet the cooling three-stage gas demand, the excess blower 13 is pumped to the dust remover 12 for dust removal.
  • the above-mentioned primer has a particle size ranging from 5 to 10 mm.
  • the above flux is at least one of limestone, dolomite, quicklime and serpentine, and the amount of quicklime ranges from 0 to 4%.
  • the above mixed granulation method is intensive mixing granulation / intensive mixing + cylindrical granulation / two-stage cylindrical mixing granulation; the mixed granulated water has a moisture content of 4-7.5%.
  • the primer is a mixture of sintered ore/iron ore/sinter and iron ore.
  • the preheating section, the preheating section, the microwave heating section, the microwave sintering section, the cooling section, the cooling section and the adjacent two sections of the cooling section are separated by a heat insulating material.
  • the heat source of the preheating section mentioned above is preheated two sections of hot flue gas, and the mixture is preheated to 150-250 ° C during the preheating period.
  • the heat source of the preheating second stage is a mixed microwave heating section, a 90-98% cooling section and a 20-50% cooling second stage hot flue gas, and the mixture is preheated to 350-600 ° C in the preheating section.
  • the microwave heating section of the microwave heating section and the microwave sintering section are uniformly installed on the upper part and the two sides, and the microwave heating section further heats the temperature of the preheated mixture to 1220-1350 ° C, and the microwave sintering section makes the mixture at 1220-1350. Incubate at °C for 5-10min.
  • the microwave heating section 2-10% of the cooling part of the hot flue gas is input, and the suction pressure of the microwave heating section is lower than the preheating section and the preheating section, thereby ensuring the mixing of the gas generated by the decomposition of the flux and the mixing into the microwave sintering section.
  • the oxygen content in the layer is not less than 10%.
  • the above-mentioned cooling section, the cooling section and the cooling section adopt cascade cooling, and the cooling gas of one section is cooled to 50-80% of the cooling two-stage hot flue gas, and the cooling gas of the second section is cooled to cool the three sections of hot flue gas.
  • the cooling gas of the three cooling stages mentioned above is a preheating section of the exhaust gas after dedusting and dehumidification.
  • the supplemental partial cooling gas is used to ensure the cooling effect.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
PCT/CN2018/112043 2018-03-14 2018-10-26 一种铁矿石微波烧结方法 WO2019174241A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2020544203A JP6994579B2 (ja) 2018-03-14 2018-10-26 鉄鉱石のマイクロ波焼結方法
DE112018007266.5T DE112018007266B4 (de) 2018-03-14 2018-10-26 Mikrowellensinterverfahren für Eisenerze
KR1020207024964A KR102488023B1 (ko) 2018-03-14 2018-10-26 철광석 마이크로파 소결방법

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CN201810207218.2 2018-03-14
CN201810207218.2A CN110273065B (zh) 2018-03-14 2018-03-14 一种铁矿石微波烧结方法

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KR (1) KR102488023B1 (ja)
CN (1) CN110273065B (ja)
DE (1) DE112018007266B4 (ja)
WO (1) WO2019174241A1 (ja)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN110699542A (zh) * 2019-10-22 2020-01-17 安徽省东岷恒大冶金科技有限公司 一种烧结表层矿提质改性的工艺方法及装置
CN110937579A (zh) * 2019-12-13 2020-03-31 西安润川环保科技有限公司 一种回收废弃脱硫剂的方法
CN111426186A (zh) * 2020-04-29 2020-07-17 安徽普惠住能磁业科技有限公司 一种用于铁氧体烧结的辊道窑余热再利用装置
CN112708754A (zh) * 2021-01-26 2021-04-27 武汉科技大学 一种铁矿粉无碳烧结方法及***
CN114485154A (zh) * 2022-02-18 2022-05-13 河南中南工业有限责任公司 一种合成用金刚石组件的焙烧装置以及方法
CN114959257A (zh) * 2022-06-01 2022-08-30 湖北钡星新材料科技有限公司 一种节能型调节热量的铁矿石烧结装置及其实施方法

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CN112410545A (zh) * 2020-01-19 2021-02-26 中冶长天国际工程有限责任公司 一种铁矿微波烧结装置及烧结方法
CN113736932A (zh) * 2020-05-29 2021-12-03 宝山钢铁股份有限公司 碳铁复合炉料的制备方法
KR20240105430A (ko) * 2021-12-16 2024-07-05 제이에프이 스틸 가부시키가이샤 소결광의 제조 방법
CN114686687B (zh) * 2022-03-09 2024-05-07 山东产研绿洲环境产业技术研究院有限公司 一种钛铁矿微波富钛装置及微波富钛方法
JP2023145996A (ja) * 2022-03-29 2023-10-12 スチールプランテック株式会社 加熱式焼結機及び加熱式焼結方法
CN114737050B (zh) * 2022-04-28 2023-08-11 中南大学 一种微波低温无碳焙烧的球团生产工艺

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CN104180649A (zh) * 2014-07-08 2014-12-03 昆明理工大学 一种微波动态高温连续焙烧设备
CN107385203A (zh) * 2017-08-25 2017-11-24 鞍钢股份有限公司 一种利用热态转炉渣为粘结相制备烧结矿的方法
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Publication number Priority date Publication date Assignee Title
CN110699542A (zh) * 2019-10-22 2020-01-17 安徽省东岷恒大冶金科技有限公司 一种烧结表层矿提质改性的工艺方法及装置
CN110937579A (zh) * 2019-12-13 2020-03-31 西安润川环保科技有限公司 一种回收废弃脱硫剂的方法
CN111426186A (zh) * 2020-04-29 2020-07-17 安徽普惠住能磁业科技有限公司 一种用于铁氧体烧结的辊道窑余热再利用装置
CN112708754A (zh) * 2021-01-26 2021-04-27 武汉科技大学 一种铁矿粉无碳烧结方法及***
CN114485154A (zh) * 2022-02-18 2022-05-13 河南中南工业有限责任公司 一种合成用金刚石组件的焙烧装置以及方法
CN114959257A (zh) * 2022-06-01 2022-08-30 湖北钡星新材料科技有限公司 一种节能型调节热量的铁矿石烧结装置及其实施方法

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CN110273065B (zh) 2021-05-14
KR102488023B1 (ko) 2023-01-12
KR20200115618A (ko) 2020-10-07
JP2021515844A (ja) 2021-06-24
DE112018007266B4 (de) 2024-08-01
JP6994579B2 (ja) 2022-01-14
CN110273065A (zh) 2019-09-24
DE112018007266T5 (de) 2021-01-07

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