製鉄用含鉄集塵ダスト類の造粒方法 - Nippon Steel & Sumitomo Metal Corporation

Title:

製鉄用含鉄集塵ダスト類の造粒方法

Document Type and Number:

Japanese Patent JP5098248

Kind Code:

B2

Abstract:

To provide a method where the elution of alkaline-earth metal oxide and/or alkaline-earth metal hydroxide comprised in iron-containing collected dusts, particularly, CaO and/or Ca(OH)2as Ca2+ions is suppressed, and a granulated material having high strength is produced using the iron-containing collected dusts.

Regarding the method for granulating iron-containing collected dusts for iron manufacture, the iron-containing collected dusts are beforehand subjected to carbonatization treatment, alkaline-earth metal oxide and/or alkaline-earth metal hydroxide comprised in the iron-containing collected dusts is stabilized as alkaline-earth metal carbonate, so as to be precipitated, and thereafter, water is added to the iron-containing collected dusts and the other iron-containing raw material, so as to perform kneading and granulation.

Inventors:

Yuji Fujioka
Masanori Nakano
Shunji Kasama
Shinji Kawauchi
Akira Gushima
Yoshiyuki Matsuoka
Takehiko Sato

Application Number:

JP2006211939A

Publication Date:

December 12, 2012

Filing Date:

August 03, 2006

Export Citation:

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Assignee:

Nippon Steel & Sumitomo Metal Corporation

International Classes:

C22B1/248; B09B3/00; C22B1/00; C22B1/16

Domestic Patent References:

JP11106821A
JP62211327A

Attorney, Agent or Firm:

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nagasaka Tomoyasu

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