PROCESS FOR OPERATING ROTARY KILN USED FOR REDUCING IRON AND STEEL DUST

Title:

PROCESS FOR OPERATING ROTARY KILN USED FOR REDUCING IRON AND STEEL DUST

Document Type and Number:

Japanese Patent JP2003342649

Kind Code:

A

Abstract:

To provide a process for operating a rotary kiln used for reduction roasting iron and steel dust which improves volatilization rate of zinc without raising the temperature from an ordinary temperature during reduction roasting.

In the operation process, reduction roasting is performed by adding a carbonaceous reducing agent and a lime component to the zinc- containing iron and steel dust to evaporate and recover zinc. Here, mass ratio of the lime component calculated in terms of CaO to the carbonaceous reducing agent is ≥0.03, preferably ≥0.15.

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Inventors:

TANABE AKIHIRO
KII NOBUYUKI
KANESAKA ATSUSHI

Application Number:

JP2002157309A

Publication Date:

December 03, 2003

Filing Date:

May 30, 2002

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO

International Classes:

C22B7/02; C22B9/02; C22B19/04; C22B19/30; C22B19/38; B09B3/00; (IPC1-7): C22B19/38; B09B3/00; C22B7/02; C22B9/02; C22B19/04; C22B19/30

Attorney, Agent or Firm:

Asao Kamoda (1 person outside)

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