Title:
METAL OXIDE SMELTING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/147145
Kind Code:
A1
Abstract:
Provided is a smelting method in which, for example, a metal oxide such as a nickel oxide ore including nickel oxide is used as a source material and is reduced with a carbonaceous reducing agent to obtain a reduced product, with which method efficient processing can be achieved. This metal oxide smelting method is, for example, a nickel oxide ore smelting method. Specifically, the method includes a reduction process step S3 that has: a drying step S31 in which a mixture that was obtained by mixing a metal oxide and a carbonaceous reducing agent is dried; a preheating step S32 in which the dried mixture is preheated; a reduction step S33 in which the preheated mixture is reduced using a rotary hearth furnace 1, a hearth of which rotates; and a cooling step S35 in which the obtained reduced product is cooled. Additionally, the reduced product that was obtained through the reduction step S33 is preferably subjected to a temperature maintenance step S34 in which the reduced product is maintained at a prescribed temperature within the rotary hearth furnace 1.
Inventors:
ISEKI TAKASHI (JP)
GODA YUKIHIRO (JP)
KOBAYASHI JUN-ICHI (JP)
OKADA SHUJI (JP)
GODA YUKIHIRO (JP)
KOBAYASHI JUN-ICHI (JP)
OKADA SHUJI (JP)
Application Number:
PCT/JP2018/003273
Publication Date:
August 16, 2018
Filing Date:
January 31, 2018
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B5/10; C22B1/24; C22B23/02
Foreign References:
| JP2000292069A | 2000-10-20 | |||
| JP2002030319A | 2002-01-31 | |||
| JP2003073722A | 2003-03-12 | |||
| JP2016035083A | 2016-03-17 | |||
| JP2009079292A | 2009-04-16 | |||
| JP2004156140A | 2004-06-03 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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