JPS5591905A - Using method for reducing agent in rotary kiln - Google Patents

Using method for reducing agent in rotary kiln

Info

Publication number
JPS5591905A
JPS5591905A JP16506778A JP16506778A JPS5591905A JP S5591905 A JPS5591905 A JP S5591905A JP 16506778 A JP16506778 A JP 16506778A JP 16506778 A JP16506778 A JP 16506778A JP S5591905 A JPS5591905 A JP S5591905A
Authority
JP
Japan
Prior art keywords
reducing
reducing agent
zone
temp
reactivity
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP16506778A
Other languages
Japanese (ja)
Inventor
Kazuharu Yatsunami
Ryoji Yamamoto
Katsuaki Shiobara
Keiichi Hagiwara
Shinichi Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOKAN KOGYO KK
Kokan Mining Co Ltd
JFE Engineering Corp
Original Assignee
KOKAN KOGYO KK
Kokan Mining Co Ltd
NKK Corp
Nippon Kokan Ltd
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 KOKAN KOGYO KK, Kokan Mining Co Ltd, NKK Corp, Nippon Kokan Ltd filed Critical KOKAN KOGYO KK
Priority to JP16506778A priority Critical patent/JPS5591905A/en
Publication of JPS5591905A publication Critical patent/JPS5591905A/en
Pending legal-status Critical Current

Links

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
    • C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces

Abstract

PURPOSE:To make metal product in a high reducing yield, by charging a reducing agent of low reactivity and a reducing agent of high reactivity respectively to an inlet side and an outlet side of a rotary kiln, thereby preventing powdering of the pellet in the kiln. CONSTITUTION:A rotary kiln 2 is provided longitudinally with a preheating zone and a reducing zone respectively in inlet 2a side half and in outlet 2b side half thereof. By controlling the quantity of air blow by means of a shell fan 4, the preheating zone is maintained at a comparatively low temp. and the reducing zone at a comparatively high temp. In reducing the pellet packed with reducing agent therein under such conditions, a reducing agent of low reactivity, e.g., coal of high carbonization degree, is furnished to the inlet side 2a, and a reducing agent of high reactivity, e.g., coal of high porosity and low crushing strength, to the outlet side 2b. As a result, reduction is hardly caused in the preheating zone which is at a comparatively low temp., whereas the the pellets are rapidly reduced in the high temp. reducing zone while keeping the prescribed strength of the pellets so as to accelerate metallization. In Figure, 1 is a preheater and 3 is an after-burner.
JP16506778A 1978-12-29 1978-12-29 Using method for reducing agent in rotary kiln Pending JPS5591905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16506778A JPS5591905A (en) 1978-12-29 1978-12-29 Using method for reducing agent in rotary kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16506778A JPS5591905A (en) 1978-12-29 1978-12-29 Using method for reducing agent in rotary kiln

Publications (1)

Publication Number Publication Date
JPS5591905A true JPS5591905A (en) 1980-07-11

Family

ID=15805231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16506778A Pending JPS5591905A (en) 1978-12-29 1978-12-29 Using method for reducing agent in rotary kiln

Country Status (1)

Country Link
JP (1) JPS5591905A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816053A (en) * 1981-07-21 1983-01-29 Nippon Kokan Kk <Nkk> Manufacture of ferrochromium
JPS5822355A (en) * 1981-07-31 1983-02-09 Nippon Kokan Kk <Nkk> Preparation of ferrochrome by rotary furnace
JPS5822356A (en) * 1981-07-31 1983-02-09 Nippon Kokan Kk <Nkk> Preparation of ferrochrome by rotary furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816053A (en) * 1981-07-21 1983-01-29 Nippon Kokan Kk <Nkk> Manufacture of ferrochromium
JPS5822355A (en) * 1981-07-31 1983-02-09 Nippon Kokan Kk <Nkk> Preparation of ferrochrome by rotary furnace
JPS5822356A (en) * 1981-07-31 1983-02-09 Nippon Kokan Kk <Nkk> Preparation of ferrochrome by rotary furnace

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