NL1006553C2 - Werkwijze voor het sturen (control) van een smelting reduction process. - Google Patents

Werkwijze voor het sturen (control) van een smelting reduction process. Download PDF

Info

Publication number: NL1006553C2
Authority: NL; Netherlands
Prior art keywords: coal; ratio; carbon; gas; char
Prior art date: 1997-07-11

Application number

NL1006553A

Other languages

English (en)

Dutch (nl)

Inventor

Mark Bernard Denys

Original Assignee

Hoogovens Staal Bv

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.)

1997-07-11

Filing date

1997-07-11

Publication date

1999-01-12

1997-07-11 Application filed by Hoogovens Staal Bv filed Critical Hoogovens Staal Bv

1997-07-11 Priority to NL1006553A priority Critical patent/NL1006553C2/nl

1998-03-07 Priority to UA2000010446A priority patent/UA52761C2/uk

1998-03-07 Priority to IDW991386A priority patent/ID23039A/id

1998-07-03 Priority to BR9811680-0A priority patent/BR9811680A/pt

1998-07-03 Priority to US09/423,227 priority patent/US6273931B1/en

1998-07-03 Priority to ES98941298T priority patent/ES2167923T3/es

1998-07-03 Priority to AT98941298T priority patent/ATE209694T1/de

1998-07-03 Priority to AU89737/98A priority patent/AU724385B2/en

1998-07-03 Priority to CN98805690A priority patent/CN1094980C/zh

1998-07-03 Priority to CA002296351A priority patent/CA2296351C/en

1998-07-03 Priority to PCT/EP1998/004186 priority patent/WO1999002739A1/en

1998-07-03 Priority to DE69802693T priority patent/DE69802693T2/de

1998-07-03 Priority to EP98941298A priority patent/EP0996749B1/de

1998-07-03 Priority to RU2000103218/02A priority patent/RU2171850C1/ru

1998-07-03 Priority to PL98338006A priority patent/PL187541B1/pl

1998-07-03 Priority to KR1019997010538A priority patent/KR100355696B1/ko

1998-07-08 Priority to ZA986036A priority patent/ZA986036B/xx

1998-07-09 Priority to MYPI98003136A priority patent/MY120541A/en

1998-07-10 Priority to TW087111254A priority patent/TW397867B/zh

1999-01-12 Application granted granted Critical

1999-01-12 Publication of NL1006553C2 publication Critical patent/NL1006553C2/nl

Links

238000000034 method Methods 0.000 title claims abstract description 32
238000011946 reduction process Methods 0.000 title claims abstract description 11
239000000155 melt Substances 0.000 title claims description 10
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
229910052799 carbon Inorganic materials 0.000 claims abstract description 43
239000003245 coal Substances 0.000 claims abstract description 39
230000008569 process Effects 0.000 claims abstract description 25
239000001257 hydrogen Substances 0.000 claims abstract description 22
229910052739 hydrogen Inorganic materials 0.000 claims abstract description 22
239000007789 gas Substances 0.000 claims abstract description 21
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 20
229910000805 Pig iron Inorganic materials 0.000 claims abstract description 11
210000000540 fraction c Anatomy 0.000 claims abstract description 4
239000002912 waste gas Substances 0.000 claims description 20
239000000654 additive Substances 0.000 claims description 8
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
239000001301 oxygen Substances 0.000 claims description 7
229910052760 oxygen Inorganic materials 0.000 claims description 7
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
238000004519 manufacturing process Methods 0.000 claims description 4
238000005070 sampling Methods 0.000 claims description 4
238000002347 injection Methods 0.000 claims description 3
239000007924 injection Substances 0.000 claims description 3
239000002817 coal dust Substances 0.000 claims description 2
238000003723 Smelting Methods 0.000 abstract 1
239000002893 slag Substances 0.000 description 24
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
239000000428 dust Substances 0.000 description 9
238000006722 reduction reaction Methods 0.000 description 9
229910052742 iron Inorganic materials 0.000 description 7
230000009467 reduction Effects 0.000 description 7
229930195733 hydrocarbon Natural products 0.000 description 6
150000002430 hydrocarbons Chemical class 0.000 description 6
238000002844 melting Methods 0.000 description 6
230000008018 melting Effects 0.000 description 6
238000004364 calculation method Methods 0.000 description 5
UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
238000006243 chemical reaction Methods 0.000 description 4
238000002485 combustion reaction Methods 0.000 description 4
239000002184 metal Substances 0.000 description 4
229910052751 metal Inorganic materials 0.000 description 4
230000001276 controlling effect Effects 0.000 description 3
239000010439 graphite Substances 0.000 description 3
229910002804 graphite Inorganic materials 0.000 description 3
239000007788 liquid Substances 0.000 description 3
241000237858 Gastropoda Species 0.000 description 2
230000000996 additive effect Effects 0.000 description 2
238000004458 analytical method Methods 0.000 description 2
238000003287 bathing Methods 0.000 description 2
230000008901 benefit Effects 0.000 description 2
230000015572 biosynthetic process Effects 0.000 description 2
229910000019 calcium carbonate Inorganic materials 0.000 description 2
235000010216 calcium carbonate Nutrition 0.000 description 2
239000006260 foam Substances 0.000 description 2
150000002431 hydrogen Chemical class 0.000 description 2
238000011112 process operation Methods 0.000 description 2
239000002994 raw material Substances 0.000 description 2
240000007124 Brassica oleracea Species 0.000 description 1
235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
235000011301 Brassica oleracea var capitata Nutrition 0.000 description 1
235000001169 Brassica oleracea var oleracea Nutrition 0.000 description 1
239000004215 Carbon black (E152) Substances 0.000 description 1
208000035699 Distal ileal obstruction syndrome Diseases 0.000 description 1
235000019738 Limestone Nutrition 0.000 description 1
150000001721 carbon Chemical class 0.000 description 1
238000003763 carbonization Methods 0.000 description 1
230000008859 change Effects 0.000 description 1
239000003638 chemical reducing agent Substances 0.000 description 1
238000011109 contamination Methods 0.000 description 1
238000001816 cooling Methods 0.000 description 1
239000000498 cooling water Substances 0.000 description 1
238000007872 degassing Methods 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000000605 extraction Methods 0.000 description 1
239000012530 fluid Substances 0.000 description 1
230000004907 flux Effects 0.000 description 1
238000005187 foaming Methods 0.000 description 1
238000007710 freezing Methods 0.000 description 1
230000008014 freezing Effects 0.000 description 1
239000000446 fuel Substances 0.000 description 1
229910052500 inorganic mineral Inorganic materials 0.000 description 1
238000009434 installation Methods 0.000 description 1
235000013980 iron oxide Nutrition 0.000 description 1
JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
239000006028 limestone Substances 0.000 description 1
239000011707 mineral Substances 0.000 description 1
235000010755 mineral Nutrition 0.000 description 1
239000000203 mixture Substances 0.000 description 1
238000012544 monitoring process Methods 0.000 description 1
-1 ore Substances 0.000 description 1
239000002245 particle Substances 0.000 description 1
239000013618 particulate matter Substances 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
230000000087 stabilizing effect Effects 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/06—Making pig-iron other than in blast furnaces in rotary kilns
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Manufacture Of Iron (AREA)
Carbon Steel Or Casting Steel Manufacturing (AREA)
Manufacture And Refinement Of Metals (AREA)
Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Medicines Containing Plant Substances (AREA)
Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Control Of Fluid Pressure (AREA)

NL1006553A 1997-07-11 1997-07-11 Werkwijze voor het sturen (control) van een smelting reduction process. NL1006553C2 (nl)

Priority Applications (19)

Application Number	Priority Date	Filing Date	Title
NL1006553A NL1006553C2 (nl)	1997-07-11	1997-07-11	Werkwijze voor het sturen (control) van een smelting reduction process.
IDW991386A ID23039A (id)	1997-07-11	1998-03-07	Metode untuk mengontrol proses reduksi peleburan
UA2000010446A UA52761C2 (uk)	1997-07-11	1998-03-07	Спосіб керування процесом плавильного відновлення оксидів заліза
EP98941298A EP0996749B1 (de)	1997-07-11	1998-07-03	Verfahren zum regeln eines schmelz-reduktionsverfahrens
ES98941298T ES2167923T3 (es)	1997-07-11	1998-07-03	Metodo para controlar un proceso de reduccion en masa fundida.
AT98941298T ATE209694T1 (de)	1997-07-11	1998-07-03	Verfahren zum regeln eines schmelz- reduktionsverfahrens
AU89737/98A AU724385B2 (en)	1997-07-11	1998-07-03	Method for controlling a smelting reduction process
CN98805690A CN1094980C (zh)	1997-07-11	1998-07-03	控制熔融还原工艺的方法
BR9811680-0A BR9811680A (pt)	1997-07-11	1998-07-03	Método para o controle de um processo de forno de fundição
PCT/EP1998/004186 WO1999002739A1 (en)	1997-07-11	1998-07-03	Method for controlling a smelting reduction process
DE69802693T DE69802693T2 (de)	1997-07-11	1998-07-03	Verfahren zum regeln eines schmelz-reduktionsverfahrens
US09/423,227 US6273931B1 (en)	1997-07-11	1998-07-03	Method for controlling a smelting reduction process
RU2000103218/02A RU2171850C1 (ru)	1997-07-11	1998-07-03	Способ управления процессом восстановления при плавке
PL98338006A PL187541B1 (pl)	1997-07-11	1998-07-03	Sposób sterowania procesem wytapiania z redukcją w kąpieli
KR1019997010538A KR100355696B1 (ko)	1997-07-11	1998-07-03	제련 환원 처리의 제어방법
CA002296351A CA2296351C (en)	1997-07-11	1998-07-03	Method for controlling a smelting reduction process
ZA986036A ZA986036B (en)	1997-07-11	1998-07-08	Method for controlling a smelting reduction process
MYPI98003136A MY120541A (en)	1997-07-11	1998-07-09	Method for controlling a smelting reduction process
TW087111254A TW397867B (en)	1997-07-11	1998-07-10	Method for controlling a smelting reduction process

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
NL1006553A NL1006553C2 (nl)	1997-07-11	1997-07-11	Werkwijze voor het sturen (control) van een smelting reduction process.
NL1006553		1997-07-11

Publications (1)

Publication Number	Publication Date
NL1006553C2 true NL1006553C2 (nl)	1999-01-12

Family

ID=19765328

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL1006553A NL1006553C2 (nl)	1997-07-11	1997-07-11	Werkwijze voor het sturen (control) van een smelting reduction process.

Country Status (19)

Country	Link
US (1)	US6273931B1 (de)
EP (1)	EP0996749B1 (de)
KR (1)	KR100355696B1 (de)
CN (1)	CN1094980C (de)
AT (1)	ATE209694T1 (de)
AU (1)	AU724385B2 (de)
BR (1)	BR9811680A (de)
CA (1)	CA2296351C (de)
DE (1)	DE69802693T2 (de)
ES (1)	ES2167923T3 (de)
ID (1)	ID23039A (de)
MY (1)	MY120541A (de)
NL (1)	NL1006553C2 (de)
PL (1)	PL187541B1 (de)
RU (1)	RU2171850C1 (de)
TW (1)	TW397867B (de)
UA (1)	UA52761C2 (de)
WO (1)	WO1999002739A1 (de)
ZA (1)	ZA986036B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU2003205586A1 (en) *	2002-01-10	2003-07-24	Novartis Ag	Drug delivery systems for the prevention and treatment of vascular diseases comprising rapamycin and derivatives thereof
US7364691B2 (en) *	2004-06-08	2008-04-29	Technological Resources Pty. Limited	Metallurgical vessel
DE102006017272A1 (de) *	2006-04-12	2007-10-18	Bst Safety Textiles Gmbh	Airbaggewebe
WO2008018805A2 (en)	2006-08-09	2008-02-14	Auckland Uniservices Limited	Process control of an industrial plant
CN103924024B (zh) *	2013-01-10	2016-02-24	宝山钢铁股份有限公司	一种铁浴熔融还原炉预还原方法
US10100378B2 (en)	2013-12-19	2018-10-16	Tata Steel Nederland Technology B.V.	Method to operate a smelt cyclone
CN106119543B (zh) *	2016-07-01	2019-03-08	北京中凯宏德科技有限公司	冶金电炉及熔炼方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL6506507A (de) *	1964-05-23	1965-11-24
JPH01252715A (ja) *	1988-03-31	1989-10-09	Nippon Steel Corp	鉄浴式溶融還元炉の操業方法
JPH01275711A (ja) *	1988-04-28	1989-11-06	Sumitomo Metal Ind Ltd	溶融還元方法
EP0384395A2 (de) *	1989-02-21	1990-08-29	Nkk Corporation	Verfahren zur Schmelzreduktion von Nickelerzen
EP0690136A1 (de) *	1994-07-01	1996-01-03	Hoogovens Groep B.V.	Verfahren und Vorrichtung zum Herstellen von Eisen aus Eisenverbindungen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1508077C3 (de) *	1965-05-25	1974-03-28	5100 Aachen	Reduktion von Eisenerzen unter Anwendung von Atomwärme
US3711275A (en) *	1969-10-13	1973-01-16	M Johnsson	Method for the production of liquid pig iron or steel directly of dressed ore
NL9500264A (nl) *	1995-02-13	1996-09-02	Hoogovens Staal Bv	Werkwijze voor het produceren van vloeibaar ruwijzer.

1997
- 1997-07-11 NL NL1006553A patent/NL1006553C2/nl not_active IP Right Cessation
1998
- 1998-03-07 ID IDW991386A patent/ID23039A/id unknown
- 1998-03-07 UA UA2000010446A patent/UA52761C2/uk unknown
- 1998-07-03 CN CN98805690A patent/CN1094980C/zh not_active Expired - Fee Related
- 1998-07-03 DE DE69802693T patent/DE69802693T2/de not_active Expired - Fee Related
- 1998-07-03 ES ES98941298T patent/ES2167923T3/es not_active Expired - Lifetime
- 1998-07-03 RU RU2000103218/02A patent/RU2171850C1/ru not_active IP Right Cessation
- 1998-07-03 PL PL98338006A patent/PL187541B1/pl not_active IP Right Cessation
- 1998-07-03 CA CA002296351A patent/CA2296351C/en not_active Expired - Fee Related
- 1998-07-03 WO PCT/EP1998/004186 patent/WO1999002739A1/en not_active Ceased
- 1998-07-03 US US09/423,227 patent/US6273931B1/en not_active Expired - Fee Related
- 1998-07-03 EP EP98941298A patent/EP0996749B1/de not_active Expired - Lifetime
- 1998-07-03 KR KR1019997010538A patent/KR100355696B1/ko not_active Expired - Fee Related
- 1998-07-03 AT AT98941298T patent/ATE209694T1/de not_active IP Right Cessation
- 1998-07-03 BR BR9811680-0A patent/BR9811680A/pt not_active IP Right Cessation
- 1998-07-03 AU AU89737/98A patent/AU724385B2/en not_active Ceased
- 1998-07-08 ZA ZA986036A patent/ZA986036B/xx unknown
- 1998-07-09 MY MYPI98003136A patent/MY120541A/en unknown
- 1998-07-10 TW TW087111254A patent/TW397867B/zh not_active IP Right Cessation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL6506507A (de) *	1964-05-23	1965-11-24
JPH01252715A (ja) *	1988-03-31	1989-10-09	Nippon Steel Corp	鉄浴式溶融還元炉の操業方法
JPH01275711A (ja) *	1988-04-28	1989-11-06	Sumitomo Metal Ind Ltd	溶融還元方法
EP0384395A2 (de) *	1989-02-21	1990-08-29	Nkk Corporation	Verfahren zur Schmelzreduktion von Nickelerzen
EP0690136A1 (de) *	1994-07-01	1996-01-03	Hoogovens Groep B.V.	Verfahren und Vorrichtung zum Herstellen von Eisen aus Eisenverbindungen

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 595 (C - 672) 27 December 1989 (1989-12-27) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 043 (C - 0681) 26 January 1990 (1990-01-26) *

Also Published As

Publication number	Publication date
ES2167923T3 (es)	2002-05-16
UA52761C2 (uk)	2003-01-15
EP0996749B1 (de)	2001-11-28
KR100355696B1 (ko)	2002-10-11
CA2296351C (en)	2004-02-17
WO1999002739A1 (en)	1999-01-21
PL338006A1 (en)	2000-09-25
KR20010012581A (ko)	2001-02-15
CN1094980C (zh)	2002-11-27
RU2000103218A (ru)	2005-01-20
DE69802693T2 (de)	2002-08-01
EP0996749A1 (de)	2000-05-03
CN1259172A (zh)	2000-07-05
CA2296351A1 (en)	1999-01-21
ID23039A (id)	2000-01-06
BR9811680A (pt)	2000-09-19
MY120541A (en)	2005-11-30
RU2171850C1 (ru)	2001-08-10
AU724385B2 (en)	2000-09-21
ZA986036B (en)	1999-01-26
PL187541B1 (pl)	2004-07-30
AU8973798A (en)	1999-02-08
ATE209694T1 (de)	2001-12-15
DE69802693D1 (de)	2002-01-10
US6273931B1 (en)	2001-08-14
TW397867B (en)	2000-07-11

Legal Events

Date	Code	Title	Description
1999-03-01	PD2B	A search report has been drawn up
2007-04-02	VD1	Lapsed due to non-payment of the annual fee	Effective date: 20070201

Publication	Publication Date	Title
CA2024466C (en)	1996-08-20	Method of operating in-bath smelting reduction furnace
US3556773A (en)	1971-01-19	Refining of metals
EP0827554B1 (de)	2002-11-13	Stabiles arbeitsverfahren eines schmelzreaktors
NL1006553C2 (nl)	1999-01-12	Werkwijze voor het sturen (control) van een smelting reduction process.
US4419128A (en)	1983-12-06	Continuous melting, refining and casting process
US2906616A (en)	1959-09-29	Method for desulfurizing molten metal and in particular liquid pig iron
US1709389A (en)	1929-04-16	Bessemer process of making steel
TW202035706A (zh)	2020-10-01	增碳材及使用其之增碳方法
SU1695828A3 (ru)	1991-11-30	Способ продувки расплава в печи
US4178174A (en)	1979-12-11	Direct production of copper metal
Shevchenko et al.	2011	Improving the ladle desulfurization of hot metal in low-sulfur steel production
MXPA99010627A (en)	2000-09-04	Method for controlling a smelting reduction process
KR100257213B1 (ko)	2000-05-15	크롬 광석의 용융 환원 방법
CN115485396A (zh)	2022-12-16	凝固层的变动检测方法及高炉操作方法
CS249112B2 (en)	1987-03-12	Method of melted metal's controlled refining
Luerssen et al.	1957	An oxygen steelmaking process
SU876726A1 (ru)	1981-10-30	Способ выплавки стали
Lowry	1949	Coke Ash and Coke Sulfur in the Blast Furnace
JPH02190412A (ja)	1990-07-26	溶融還元炉の操業方法
JPH01283309A (ja)	1989-11-14	溶融還元炉の操業法
SU1175969A1 (ru)	1985-08-30	Способ производства стали в конвертере
JPS62224613A (ja)	1987-10-02	フオ−ミング制御方法
JPS60215705A (ja)	1985-10-29	溶融還元炉の操業方法
JPH02104608A (ja)	1990-04-17	二次燃焼方法
JPS61139610A (ja)	1986-06-26	高炉の低シリコン操業方法