WO2009129677A1 - 高温煤气高炉炼铁工艺 - Google Patents

高温煤气高炉炼铁工艺 Download PDF

Info

Publication number
WO2009129677A1
WO2009129677A1 PCT/CN2008/072714 CN2008072714W WO2009129677A1 WO 2009129677 A1 WO2009129677 A1 WO 2009129677A1 CN 2008072714 W CN2008072714 W CN 2008072714W WO 2009129677 A1 WO2009129677 A1 WO 2009129677A1
Authority
WO
WIPO (PCT)
Prior art keywords
blast furnace
furnace
coal gas
coke
iron
Prior art date
Application number
PCT/CN2008/072714
Other languages
English (en)
French (fr)
Inventor
周久乐
Original Assignee
Zhou Jiule
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhou Jiule filed Critical Zhou Jiule
Priority to US12/988,515 priority Critical patent/US8357224B2/en
Priority to DE112008003823T priority patent/DE112008003823T5/de
Priority to AU2008355447A priority patent/AU2008355447A1/en
Publication of WO2009129677A1 publication Critical patent/WO2009129677A1/zh

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents

Definitions

  • the invention relates to the field of iron making in steel metallurgy.
  • the invention is a new process of submerging the high-temperature air into the blast furnace in the process of the traditional blast furnace iron making process, replacing the high-temperature air into the blast furnace.
  • the current blast furnace ironmaking process is to add alkaline sinter, pellets (iron oxide ore) coke, limestone, pulverized coal, blasting air (preheating 900-125 CTC) or oxygen-enriched air to the blast furnace.
  • iron Relying on the above process, the most advanced domestic fuel consumption in the ironmaking process is 468kg per ton, and the carbon dioxide emissions are more than 1500kg per ton of iron.
  • the high-temperature gas blast furnace ironmaking process of the present invention is proposed.
  • the high temperature gas blast furnace iron making process includes the following processes:
  • the ore material consisting of pellets, alkaline sinter, coke and limestone is fed into the blast furnace from the top of the furnace, wherein each ton of molten iron is equipped with coke 125-210kg (secondary metallurgical coke);
  • the ratio is 90%, the proportion of alkaline sinter is 10%, and the taste of the furnace is above 62%.
  • the gas is preheated to 1250-1450 °C through a horizontal high-temperature hot blast stove, and then blasted from the upper part of the blast furnace hearth into the blast furnace, and 1000 m 3 per ton of molten iron (heat value 11.7 mj/m 3 -12.5 mj) /m 3 ) Gas, gas pressure is 0.1-0.6MPa; in addition, part of the preheated air is blown in (preheating temperature is higher than 1250-1450 °C), and the amount of air is 300nm 3 /t-400nm 3 /t.
  • the iron making process of the present invention uses a large amount of coal gas in the blast furnace to replace part of the coke as a reducing agent, and at the same time, because of the high calorific value of the gas, it also saves some coke as a fuel.
  • the temperature of the molten iron for smelting is 1500 °C
  • the silicon content of molten iron is less than 0.2%
  • the molten iron contains 2.5-4.2% of carbon
  • the utilization coefficient of blast furnace can reach 6-8t/dm 3 , which is doubled than the conventional one.
  • the best level can be controlled below 325kgce/t hot metal.
  • the invention saves fuel consumption by 143kg/t compared with the most advanced level of traditional technology, which is equivalent to 30.56% energy saving than the most advanced level and more than 40% carbon dioxide emission reduction.
  • the blast furnace slag amount is reduced by 1/3-1/2 compared with the conventional process, and the coke ratio Can be reduced by 50% compared to the most advanced level in the country.
  • Pellet ore, alkaline sinter, coke, limestone are sent from the top of the furnace into the blast furnace, wherein 150 kg of coke per ton of iron and 90% of the pellets are mixed; then the blast furnace is blown from the upper part of the blast furnace to the blast furnace.
  • the high-temperature gas preheated by the horizontal high-temperature hot blast stove has a gas temperature of 1300-1400 ° C, 1000 m 3 per ton of molten iron, and a gas pressure of 0.3-0.5 MPa.
  • the air preheated to 1300-1400 °C is blasted into the blast furnace, the air volume is 300nm 3 /t-400nm 3 /t, the molten iron temperature obtained by this process is 1520 ° C, and the silicon content of molten iron It is 0.18%, contains 3.0% carbon, the blast furnace utilization factor is 7 t/dm 3 , and the process energy consumption is 320kgce/t hot metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Iron (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

高温煤气高炉炼铁工艺 技术领域：
本发明涉及钢铁冶金中炼铁领域。 本发明是在传统高炉炼铁工艺过程中， 用经预热的高无奈煤气鼓入高炉， 代替大部分高温空气鼓入炼铁的新工艺。
背景技术：
现行的高炉炼铁工艺， 是向高炉加入碱性烧结矿、 球团矿 （含铁氧化矿） 焦炭、 石灰石、 喷入煤粉， 鼓入空气 （预热 900-125CTC ) 或者富氧空气进行炼 铁。 依靠上述工艺， 炼铁工序燃料消耗国内最先进水平为每吨 468kg,二氧化碳 排放每吨铁大于 1500kg以上。
发明内容
为进一歩节约能源， 减少二氧化碳排放， 提高高炉每单位有效容积的产量， 提出本发明的高温煤气高炉炼铁工艺。
采用的技术方案为：
高温煤气高炉炼铁工艺包括如下过程：
1、将由球团矿、碱性烧结矿、焦炭、石灰石构成的矿料从炉顶送入高炉中， 其中每吨铁水配焦炭 125— 210kg (二级冶金焦）； 其中含铁炉料球团矿比例为 90%, 碱性烧结矿比例为 10%， 入炉矿品味在 62%以上。
2、 通过卧式高温热风炉把煤气预热到 1250-1450°C， 然后从高炉炉缸上部 鼓入高炉中参与冶炼， 每吨铁水鼓入 1000m3 (热值 11.7mj/m3-12.5mj/m3 )煤气， 煤气压力为 0.1-0.6MPa;另外鼓入部分预热空气 （预热温度高于 1250-1450°C )， 鼓入空气数量为 300nm3/t-400nm3/t。
本发明的炼铁工艺， 由于采用向高炉中鼓入大量煤气， 取代了部分焦炭作 为还原剂， 同时由于煤气热值较高， 也节省部分焦炭作为燃料的消耗。
按上述工艺， 冶炼的生铁铁水温度 1500°C， 铁水含硅小于 0.2%， 铁水含 碳 2.5-4.2%， 高炉利用系数可达到 6-8t/d m3,比常规提高一倍， 该工序能耗最好 水平可控制在 325kgce/t铁水以下。
-1- 本发明比传统工艺最先进水平节约燃料消耗 143kg/t， 相当于比最先进水平 节能 30.56%， 二氧化碳减排 40%以上。 高炉渣量比传统工艺减少 1/3-1/2， 焦比 可比国内最先进水平降低 50%。
具体实施方式
实施例一
高温煤气高炉炼铁工艺：
将球团矿、 碱性烧结矿、 焦炭、 石灰石从炉顶送入高炉中， 其中每吨铁配 焦炭 150kg ， 球团矿的配比为 90%; 然后从高炉炉缸上部向高炉中鼓入由卧式 高温热风炉预热的高温煤气， 煤气温度为 1300-1400 °C， 每吨铁水鼓入 1000m3, 煤气压力 0.3-0.5MPa。 并同时将预热到 1300-1400°C的空气鼓入高炉中， 鼓入空 气量为 300nm3/t-400nm3/t， 经此工艺所炼得的铁水温度 1520°C， 铁水含硅量为 0.18%, 含碳 3.0%， 高炉利用系数 7 t/d m3， 工序能耗 320kgce/t铁水。

Claims

权利要求
1、 高温煤气高炉炼铁工艺， 其特征包括以下工艺过程：
1 )、 将由球团矿、 碱性烧结矿、 焦炭、 石灰石构成的矿料从炉顶送入高炉 中， 其中每吨铁水配焦炭 125— 210kg; 其中含铁炉料球团矿比例为 90%， 碱性 烧结矿比例为 10%， 入炉矿品味在 62%以上；
2 )将煤气预热到 1250-1450°C， 然后从高炉炉缸上部鼓入高炉中参与冶炼， 每吨铁水鼓入 1000m3热值为 11.7mj/m3— 12.5mj/m3的煤气， 煤气压力为 0.1— 0.6Mpa; 另外还需鼓入 300nm3/t— 400nm3/t预热空气， 预热空气的预热温度为 1250— 1450°C。
2、 根据权利要求 1所述的高温煤气高炉炼铁工艺， 其特征在于煤气经过卧 式高温热风炉预热到 1250— 1450°C。
PCT/CN2008/072714 2008-04-23 2008-10-16 高温煤气高炉炼铁工艺 WO2009129677A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/988,515 US8357224B2 (en) 2008-04-23 2008-10-16 Method of iron smelting in blast furnace with high temperature coal Gas
DE112008003823T DE112008003823T5 (de) 2008-04-23 2008-10-16 Methode für Eisenschmelzen im Hochofen mit Hochtemperatur-Kohlengas
AU2008355447A AU2008355447A1 (en) 2008-04-23 2008-10-16 A method of iron smelting in blast furnace with high temperature coal gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2008100111583A CN101280348A (zh) 2008-04-23 2008-04-23 高温煤气高炉炼铁工艺
CN200810011158.3 2008-04-23

Publications (1)

Publication Number Publication Date
WO2009129677A1 true WO2009129677A1 (zh) 2009-10-29

Family

ID=40013022

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/072714 WO2009129677A1 (zh) 2008-04-23 2008-10-16 高温煤气高炉炼铁工艺

Country Status (5)

Country Link
US (1) US8357224B2 (zh)
CN (1) CN101280348A (zh)
AU (1) AU2008355447A1 (zh)
DE (1) DE112008003823T5 (zh)
WO (1) WO2009129677A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101280348A (zh) * 2008-04-23 2008-10-08 沈阳东方钢铁有限公司 高温煤气高炉炼铁工艺
CN109136431A (zh) * 2018-09-26 2019-01-04 首钢集团有限公司 一种高炉冶炼过程中提高燃料利用效率的方法
CN114959258B (zh) * 2022-05-30 2024-06-18 广东韶钢松山股份有限公司 一种高炉高比例球团矿的冶炼方法

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE817647R (fr) * 1974-07-15 1974-11-04 Bruleur reducteur de haut fourneau ou toutes autres utilisations calorifiques reductrices
JPS51135814A (en) * 1975-05-19 1976-11-25 Nippon Steel Corp Method for operating blast furnace
SU1049546A1 (ru) * 1982-01-15 1983-10-23 Завод-ВТУЗ при Карагандинском металлургическом комбинате Способ доменной плавки
SU1257089A1 (ru) * 1982-04-22 1986-09-15 Коммунарский горно-металлургический институт Способ ведени доменной плавки
RU2034030C1 (ru) * 1991-04-12 1995-04-30 Цивинский Станислав Викторович Способ работы доменной печи и доменная печь
US5437706A (en) * 1994-06-10 1995-08-01 Borealis Technical Incorporated Limited Method for operating a blast furnace
BE1007565A6 (fr) * 1993-10-08 1995-08-08 Centre Rech Metallurgique Procede pour la conduite d'un haut-fourneau.
CN1219595A (zh) * 1997-10-29 1999-06-16 普拉塞尔技术有限公司 热氧高炉喷射系统
RU2202624C2 (ru) * 2001-06-28 2003-04-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Способ ведения доменной плавки
CN1487097A (zh) * 2003-06-23 2004-04-07 安徽工业大学 一种高效低co2排放富氢燃气纯氧高炉炼铁工艺
JP2006152434A (ja) * 2004-10-28 2006-06-15 Jfe Steel Kk 高炉操業方法
CN1916187A (zh) * 2006-09-12 2007-02-21 沈阳东方钢铁有限公司 纯氧煤气高炉炼铁工艺和设备
CN101280348A (zh) * 2008-04-23 2008-10-08 沈阳东方钢铁有限公司 高温煤气高炉炼铁工艺

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837419A (en) * 1957-02-15 1958-06-03 Texaco Development Corp Reduction of metal oxides
US4518428A (en) * 1974-08-01 1985-05-21 International Minerals & Chemical Corp. Agglomerates containing olivine
JPS62290841A (ja) * 1986-06-10 1987-12-17 Nippon Kokan Kk <Nkk> 含クロム銑の製造方法

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE817647R (fr) * 1974-07-15 1974-11-04 Bruleur reducteur de haut fourneau ou toutes autres utilisations calorifiques reductrices
JPS51135814A (en) * 1975-05-19 1976-11-25 Nippon Steel Corp Method for operating blast furnace
SU1049546A1 (ru) * 1982-01-15 1983-10-23 Завод-ВТУЗ при Карагандинском металлургическом комбинате Способ доменной плавки
SU1257089A1 (ru) * 1982-04-22 1986-09-15 Коммунарский горно-металлургический институт Способ ведени доменной плавки
RU2034030C1 (ru) * 1991-04-12 1995-04-30 Цивинский Станислав Викторович Способ работы доменной печи и доменная печь
BE1007565A6 (fr) * 1993-10-08 1995-08-08 Centre Rech Metallurgique Procede pour la conduite d'un haut-fourneau.
US5437706A (en) * 1994-06-10 1995-08-01 Borealis Technical Incorporated Limited Method for operating a blast furnace
CN1219595A (zh) * 1997-10-29 1999-06-16 普拉塞尔技术有限公司 热氧高炉喷射系统
RU2202624C2 (ru) * 2001-06-28 2003-04-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Способ ведения доменной плавки
CN1487097A (zh) * 2003-06-23 2004-04-07 安徽工业大学 一种高效低co2排放富氢燃气纯氧高炉炼铁工艺
JP2006152434A (ja) * 2004-10-28 2006-06-15 Jfe Steel Kk 高炉操業方法
CN1916187A (zh) * 2006-09-12 2007-02-21 沈阳东方钢铁有限公司 纯氧煤气高炉炼铁工艺和设备
CN101280348A (zh) * 2008-04-23 2008-10-08 沈阳东方钢铁有限公司 高温煤气高炉炼铁工艺

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GUO HAO: "The Research of Heat Balance Alternation Rules", MASTER'S DEGREE THESIS OF HEBEI POLYTECHNIC UNIVERSITY, 4 November 2005 (2005-11-04), pages 13,35 - 43 *

Also Published As

Publication number Publication date
AU2008355447A1 (en) 2009-10-29
US20110036203A1 (en) 2011-02-17
DE112008003823T5 (de) 2011-02-24
CN101280348A (zh) 2008-10-08
US8357224B2 (en) 2013-01-22

Similar Documents

Publication Publication Date Title
CN103468961B (zh) 一种密闭冲天炉处理钢铁厂含锌、铅粉尘工艺方法
CN104131122B (zh) 一种基于喷吹高温煤气的炼铁工艺
CN101260448B (zh) 一种直接使用精矿粉的熔融还原炼铁方法
CN114438267B (zh) 一种富氢碳循环高炉的炼铁系统
CN101935732B (zh) 一种气基还原竖炉还原煤气的入炉方法
CN105112663B (zh) 一种高碳铬铁与兰炭的联合生产工艺
CN105838838B (zh) 一种煤制气直接还原一步法制取纯净钢的方法
CN114395648B (zh) 一种富氢碳循环高炉的炼铁方法
CN101555532A (zh) 一种基于冷固结含碳球团氧气高炉炼铁方法
CN101008554A (zh) 一种铬铁冶炼竖炉及冶炼方法
CN100510120C (zh) 一种生产金属化炼铁原料的方法
CN114317852B (zh) 一种2500m3高炉煤气碳循环的低碳炼铁方法
CN106119449B (zh) 一种高炉全球团冶炼工艺
WO2023134368A1 (zh) 一种超高富氧低碳冶炼方法
CN101724727B (zh) 一种综合利用能源的短流程转底炉连续炼钢方法
CN108676947A (zh) 一种高炉喷吹用混合煤粉粒度确定方法
CN101956038B (zh) 一种铁矿石熔融还原低碳炼铁和炼钢工艺方法及装置
CN102010918A (zh) 一种环保节能高炉氧气炼铁方法
WO2009129677A1 (zh) 高温煤气高炉炼铁工艺
CN107447068A (zh) 一种煤热解气还原钒钛矿的方法和系统
CN102127610B (zh) 一种铁矿石直接熔融还原炼铁设备及炼钢工艺
WO2009030064A1 (fr) Procédé de fusion de fer et d&#39;acier sans coke
CN105463214A (zh) 一种采用低贫品位红土镍矿生产高镍铁的方法
CN109929957A (zh) 一种预还原铁矿石高温熔炼生产铁水的装置及方法
CN1435500A (zh) 一种用粉矿冷固结球团冶炼含铬铁水的方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08874001

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 12988515

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2008355447

Country of ref document: AU

ENP Entry into the national phase

Ref document number: 2008355447

Country of ref document: AU

Date of ref document: 20081016

Kind code of ref document: A

RET De translation (de og part 6b)

Ref document number: 112008003823

Country of ref document: DE

Date of ref document: 20110224

Kind code of ref document: P

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 04-02-2011 )

122 Ep: pct application non-entry in european phase

Ref document number: 08874001

Country of ref document: EP

Kind code of ref document: A1