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WO2018094885A1 - Procédé en four à cuve pour la production de coke de fer - Google Patents

Procédé en four à cuve pour la production de coke de fer Download PDF

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Publication number
WO2018094885A1
WO2018094885A1 PCT/CN2017/074677 CN2017074677W WO2018094885A1 WO 2018094885 A1 WO2018094885 A1 WO 2018094885A1 CN 2017074677 W CN2017074677 W CN 2017074677W WO 2018094885 A1 WO2018094885 A1 WO 2018094885A1
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WIPO (PCT)
Prior art keywords
carbonization
iron
coke
iron coke
chamber
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Ceased
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PCT/CN2017/074677
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English (en)
Chinese (zh)
Inventor
李建涛
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Wuhan Cosred Science And Technology Ltd
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Wuhan Cosred Science And Technology Ltd
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Application filed by Wuhan Cosred Science And Technology Ltd filed Critical Wuhan Cosred Science And Technology Ltd
Publication of WO2018094885A1 publication Critical patent/WO2018094885A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B3/00—Coke ovens with vertical chambers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B3/00—Coke ovens with vertical chambers
    • C10B3/02—Coke ovens with vertical chambers with heat-exchange devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives

Definitions

  • the invention relates to the technical field of metal fire smelting, in particular to a shaft furnace process for producing iron coke, which is mainly used for producing iron coke to replace part of coke required for blast furnace production.
  • Coke is an important raw material for blast furnace smelting. It plays the role of hot metal carburizing agent, heat generating agent, reducing agent and column skeleton in the blast furnace.
  • the blast furnace iron making needs to ensure that the blast furnace condition is stable and direct, and the coke consumption should be minimized. Therefore, the quality of the blast furnace coke is required to be high in heat strength and high in reactivity.
  • the iron coke and iron ore are mixed into the furnace for iron making, and the meanings are summarized as follows:
  • Iron coke satisfies the performance requirements of high thermal strength and reactivity of blast furnace coke, and the reactivity of iron coke is significantly higher than ordinary coke, which reduces the temperature of heat preservation zone, reduces energy consumption and improves Production efficiency;
  • Iron coke replaces some coke, which reduces coke consumption, reduces production costs, increases productivity, and reduces CO 2 emissions;
  • One is the hot press block-shaft furnace method of Japan JFE Company. This method is to heat a mixture of iron ore and non-coking coal containing a small amount of binder to a certain temperature, and form a certain shape of agglomerate with a briquetting machine, and then install The product was subjected to dry distillation in a shaft furnace type reactor, and finally a shape-regulated iron coke product was obtained.
  • the advantage of this method is that it can be equipped with iron ore (iron ore ratio up to 30%), and the thermal properties of iron coke are better.
  • its disadvantages are complicated process flow, low productivity, and difficulty in large-scale.
  • Another method is the traditional chamber coke oven method of Nippon Steel Co., Ltd., which has been industrially tested on large coke ovens. It is to add iron ore crushed to the appropriate size to the coal conveyor belt conveyor, without special mixing equipment, but to achieve uniform mixing of coal and iron ore in the belt conveyor process. Industrial test results show that the push-focus operation is smooth and there is no erosion of the furnace wall.
  • the advantage of this method is that the iron coke can be produced by the traditional coking equipment. The cold strength of the iron coke meets the requirements of the actual blast furnace production, the output is large, and the process is mature; the disadvantage is that the iron ore ratio is low, and the thermal performance is poor, and it is difficult. Achieve the desired production results.
  • the object of the present invention is to provide a shaft furnace process for producing iron coke, which is advanced and reliable, can realize large-scale production of iron coke, has good heat strength, high reactivity, and no erosion of the furnace wall in the process, thereby reducing
  • the technical solution adopted by the present invention is based on the use of a carbonization shaft furnace as shown in FIG. 2, which is a shaft furnace type composed of a carbonization chamber 1 and a combustion chamber 2, and a plurality of carbonization chambers 1 are arranged in a large combustion.
  • the carbonization chamber is modularly combined, and the carbonization chamber 1 is divided into a preheating section 4, a carbonization section 5 and a cooling section 7 from top to bottom, and heat transfer is provided between each of the carbonization chamber 1 and the combustion chamber 2.
  • a shaft furnace process for producing iron coke specifically comprising the following steps:
  • the granularity of the briquetting piece is 15-75 mm;
  • the briquetting material is loaded into the carbonization chamber in the carbonization furnace by the charging device, and the briquetting material runs downward in the carbonization chamber, and the iron coke is formed through the preheating section and the carbonization section of the carbonization chamber, and the preheating temperature is obtained.
  • the carbonization temperature is controlled at 800-1250 ° C, the total time of preheating and carbonization is 10 ⁇ 30h;
  • the iron coke is cooled to a temperature of 50-150 ° C through a cooling section, and is continuously discharged outside the furnace through a discharge device.
  • the mass ratio of iron ore fines to coal powder in the first step is 20-40:60-80.
  • the coal in the first step is non-coking coal, and is selected from one or more of anthracite, bituminous coal or lignite.
  • the speed of the operation of the press block in the carbonization chamber in the third step is controlled to be 3-30 mm/min.
  • the heat required for preheating and carbonization in the carbonization chamber in the third step is derived from the heat generated by the combustion of the fuel in the combustion chamber outside the partition wall of the carbonization chamber, and the heat is transferred to the briquetting material in the carbonization chamber through the partition wall.
  • the combustor and/or the drying compact for combustor combustion are preheated through the heat exchanger.
  • the shaft furnace process for producing iron coke according to the invention not only has simple and reliable process flow, but also can realize large-scale production, because the carbonization chamber can realize the output required for large-scale production through modular combination, and before and after the carbonization furnace Processes and equipment create conditions for large-scale production that significantly overcomes many of the shortcomings of the process of producing iron coke using coke ovens.
  • the process can obtain high-quality iron coke by effectively adjusting the carbonization temperature and carbonization time.
  • the iron coke can meet the thermal strength and reactivity performance requirements of the blast furnace coke, and the reaction of iron coke Significantly higher than ordinary coke, lowering the temperature of the heat preservation zone, so that iron coke can replace part of coke, thereby reducing coke consumption, reducing production costs, increasing productivity, reducing CO 2 emissions, and at the same time due to the addition of iron ore in non-coking coal
  • the stone has been reduced to metallic iron in the process of producing iron coke, which also reduces the coke ratio and improves production efficiency.
  • the high-quality carbonization chamber partition wall of the process adopts high-quality refractory materials, has high thermal conductivity, low porosity, high temperature resistance and wear resistance, and provides excellent conditions for high production efficiency, low energy consumption and long life.
  • the carbonization chamber of the process is divided into a preheating section, a carbonization section and a cooling section.
  • the achievable effects are: before the carbonization of the briquetting material, after sufficient preheating, the heat is effectively utilized, and the efficiency of carbonization is improved;
  • the slow downward continuous movement in the carbonization process can well avoid the bonding between the materials in the carbonization chamber and the partition walls and materials, so as not to cause difficulty in discharging and interrupt the production; after the carbonization is completed, the iron coke can be cooled in the cooling section. Cool to the desired temperature.
  • the carbonization chamber and the combustion chamber of the process are independent, and the respective reducing atmosphere and the oxidizing atmosphere do not interfere with each other, and the temperature field can be uniform, and high-quality iron coke can be obtained.
  • FIG. 1 is a flow chart showing a process of a shaft furnace for producing iron coke according to the present invention
  • Figure 2 is a schematic illustration of a carbonization shaft furnace used in the present invention.
  • the present invention provides a shaft furnace process for producing iron coke for producing iron coke which replaces coke in a blast furnace, and the main production steps thereof include:
  • the iron ore fines (0.3mm) with the qualified particle size and the coal powder are mixed with the binder, mixed and pressed, and the size of the compact is 20-50mm, and then dried;
  • the briquetting material is fed from the top of the carbonization chamber by the charging device, and the carbonization chamber is filled with all the briquetting materials. Filled, the material surface is higher than the height of the carbonization furnace body;
  • the briquetting material runs downward by gravity in the carbonization chamber. After the preheating section and the carbonization section, the carbonization process is completed.
  • the carbonization chamber temperature is 1100 ° C.
  • the heat required for preheating and carbonization in the carbonization chamber is derived from the carbonization chamber. The heat generated by the combustion of the combustion chamber outside the partition wall, the heat is transferred to the briquetting material in the carbonization chamber through the partition wall;
  • the combustion chamber is located around or on both sides of the carbonization chamber. Several burners are arranged in the combustion chamber. The combustion of the fuel and the combustion-supporting gas will generate high-temperature flue gas of 1100-1400 °C. The heat of the high-temperature flue gas is uniformly heated through the partition wall to heat the carbonization chamber.
  • the briquetting material in the wall; the fuel is at least one of coal gas, blast furnace gas, converter gas, coke oven gas, natural gas, petroleum liquefied gas or shale gas;
  • the briquetting material is fully carbonized in the carbonization chamber; according to the raw material conditions and the process requirements, the temperature in the carbonization chamber and the carbonization reaction time can be adjusted and controlled;
  • the temperature of the flue gas discharged from the combustion chamber is relatively high, about 900-1200 ° C.
  • the high-temperature flue gas after discharge is heat-recovered through the heat exchanger, preheating the combustion-supporting gas entering the combustion chamber, and the combustion-supporting gas can be preheated to 500-700. °C, the temperature of the flue gas after heat exchange is reduced to 400-600 ° C, and can also be used for drying raw materials, etc., the flue gas of 100-150 ° C after drying is discharged through the chimney;
  • the iron coke produced after passing through the carbonization section is finally passed through the cooling section, and can reach 50-150 ° C according to the required temperature, and is continuously discharged outside the furnace through the discharge device, and the obtained cold iron coke and the blast furnace raw fuel are added to the blast furnace.
  • the carbonization furnace in the process consists of a carbonization chamber and a combustion chamber.
  • the number of carbonization chambers is modularly combined according to the production requirements, and the size and number of combustion chambers are adjusted according to the number of carbonization chambers.
  • the process for producing iron coke of the present invention comprises the following steps:
  • the preheating section and the carbonization section of the carbonization chamber are rectangular, the width is 300-800 mm, the length is 1000-1800 mm, and the height is 10000-18000 mm;
  • the temperature of the flue gas coming out of the combustion chamber is about 1000 ° C.
  • the high-temperature flue gas after the discharge is heat-recovered through the heat exchanger, and the combustion air entering the combustion chamber is preheated to 600 ° C, and then the briquettes are dried by the heat exchanger.
  • the exhausted flue gas temperature is lowered to 100-150 ° C, and finally discharged through the chimney;
  • the iron coke of 1050 to 1100 °C passes through the cooling section and the temperature reaches 100 ° C or less, and is discharged from the discharge device to obtain qualified iron coke.
  • the production efficiency of the process is obviously improved, the coke ratio and production cost are significantly reduced, the daily iron coke output is about 300 tons, and the annual output can reach more than 1 million tons.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)

Abstract

L'invention concerne un procédé en four à cuve pour la production de coke de fer. Le coke de fer produit par le procédé en four à cuve peut remplacer partiellement une matière première importante, le coke, pour une production de haut-fourneau. Le procédé en four à cuve pour la production de coke de fer comprend les étapes principales suivantes : après le broyage de minerai de fer et de charbon non cokéfiant, le mélange uniforme avec un liant, le briquetage et le séchage ; puis l'ajout de briquettes dans une chambre de carbonisation d'un four de carbonisation à l'aide d'un dispositif de charge ; la réduction de finition du fer et la carbonisation du charbon non cokéfiant dans la chambre de carbonisation par une section de préchauffage et une section de carbonisation, formant ainsi le coke de fer; et le refroidissement du coke de fer, sa décharge, et son chargement dans une rainure de coke de fer. Le procédé présente des avantages remarquables en ce que le procédé est avancé et fiable, il peut mettre en œuvre une production à grande échelle de coke de fer, fournit une bonne qualité de produits, réduit la quantité de coke utilisé pour la fabrication de fer de haut fourneau, réduit les coûts de production de la fabrication de fer de haut fourneau, améliore l'efficacité de production de la fabrication de fer de haut fourneau, réduit l'émission de CO2 de la fabrication de fer de haut fourneau, et équivalents.
PCT/CN2017/074677 2016-11-24 2017-02-24 Procédé en four à cuve pour la production de coke de fer Ceased WO2018094885A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201611048771 2016-11-24
CN201611048771.3 2016-11-24
CN201611237961.X 2016-12-28
CN201611237961.XA CN106635067A (zh) 2016-11-24 2016-12-28 一种生产铁焦的竖炉工艺

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WO2018094885A1 true WO2018094885A1 (fr) 2018-05-31

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WO (1) WO2018094885A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110929445A (zh) * 2019-12-16 2020-03-27 中冶南方工程技术有限公司 一种获取铁焦生产炭化室内温度分布的方法及系统
CN113699377A (zh) * 2021-08-18 2021-11-26 重庆富燃科技股份有限公司 一种应用于金属冶炼的专属填料
CN114656988A (zh) * 2022-04-02 2022-06-24 重庆大学 一种低碳炼铁用铁钛复合焦炭及其制造方法
CN114752723A (zh) * 2022-05-20 2022-07-15 黑龙江建龙钢铁有限公司 一种焦炉与气基竖炉耦合系统及其运行方法
CN115216320A (zh) * 2022-08-17 2022-10-21 酒泉钢铁(集团)有限责任公司 一种铁碳复合炉料的生产方法
CN116377149A (zh) * 2023-03-28 2023-07-04 中钢设备有限公司 一种铁碳复合炉料的制备方法及铁碳复合炉料

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CN108085035A (zh) * 2017-12-25 2018-05-29 武汉科思瑞迪科技有限公司 一种采用热压的铁焦生产工艺
CN108130105B (zh) * 2018-01-31 2023-07-18 新疆乾海环保科技有限公司 冶金还原耦合型焦炭化共末煤热解工艺及系统
CN109929994A (zh) * 2019-04-25 2019-06-25 李海鸥 一种利用焦化厂方型炭化室还原氧化物矿物的方法
CN111004638B (zh) * 2019-12-31 2021-04-30 中冶南方工程技术有限公司 一种铁焦生产竖炉尺寸确定方法
CN113563902A (zh) * 2021-08-04 2021-10-29 上海大学 一种减少富氢高炉焦炭熔损的方法和铁焦炭化炉
CN114436682A (zh) * 2022-03-01 2022-05-06 郑州大学 一种用北非磷矿以非煤质燃料高炉法生产钙镁磷肥的方法

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JP2004217914A (ja) * 2002-12-25 2004-08-05 Jfe Steel Kk フェロコークスの製造及び使用方法、並びにフェロコークス製造における副生ガス利用方法
CN102782095A (zh) * 2010-03-03 2012-11-14 杰富意钢铁株式会社 冶金用铁焦的制造方法
CN104419434A (zh) * 2013-09-05 2015-03-18 鞍钢股份有限公司 一种烧结用半焦的制造方法
CN103468289A (zh) * 2013-09-27 2013-12-25 武汉科技大学 一种高炉用铁焦及其制备方法
CN104119939A (zh) * 2014-08-04 2014-10-29 东北大学 一种炼铁用热压铁焦及其制备方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110929445A (zh) * 2019-12-16 2020-03-27 中冶南方工程技术有限公司 一种获取铁焦生产炭化室内温度分布的方法及系统
CN110929445B (zh) * 2019-12-16 2023-04-28 中冶南方工程技术有限公司 一种获取铁焦生产炭化室内温度分布的方法及系统
CN113699377A (zh) * 2021-08-18 2021-11-26 重庆富燃科技股份有限公司 一种应用于金属冶炼的专属填料
CN114656988A (zh) * 2022-04-02 2022-06-24 重庆大学 一种低碳炼铁用铁钛复合焦炭及其制造方法
CN114752723A (zh) * 2022-05-20 2022-07-15 黑龙江建龙钢铁有限公司 一种焦炉与气基竖炉耦合系统及其运行方法
CN115216320A (zh) * 2022-08-17 2022-10-21 酒泉钢铁(集团)有限责任公司 一种铁碳复合炉料的生产方法
CN115216320B (zh) * 2022-08-17 2023-09-08 酒泉钢铁(集团)有限责任公司 一种铁碳复合炉料的生产方法
CN116377149A (zh) * 2023-03-28 2023-07-04 中钢设备有限公司 一种铁碳复合炉料的制备方法及铁碳复合炉料

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