Title:
酸化亜鉛鉱の製造方法
Document Type and Number:
Japanese Patent JP6387868
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a zinc oxide ore capable of obtaining a zinc oxide ore with high quality while maintaining the high working rate of a rotary kiln.SOLUTION: There is provided a method for producing a zinc oxide ore comprising: a preliminary mixing step where a raw material ore and a carbonaceous reducing agent are mixedly granulated to obtain a reducing agent-inner packaged pellet; a reduction roasting step where the reducing agent-inner packaged pellet is roasted to obtain crude zinc oxide; a wet step where a halogen group element(s) is removed from the crude zinc oxide by wet treatment to obtain a crude zinc oxide cake; and a dry heating step where the crude zinc oxide cake is fired by a drying heating furnace. In the preliminary mixing step, the raw material ore to be used has a grain size distribution in which the ratio of 0.5 mm under is 10% or lower, the carbonaceous reducing agent to be used in the preliminary mixing step has a grain size of 200 μm or lower, and also, the content ratio of the carbonaceous reducing agent in the reducing agent-inner packaged pellet is controlled to 18% or lower.SELECTED DRAWING: Figure 1
Inventors:
Tetsuya Koshino
Katsuhiro Tomoda
Hiroshi Watanabe
Fujiyama
Katsuhiro Tomoda
Hiroshi Watanabe
Fujiyama
Application Number:
JP2015045633A
Publication Date:
September 12, 2018
Filing Date:
March 09, 2015
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B19/34; C01G9/02; C22B1/02; C22B1/24; C22B3/00; C22B7/02
Domestic Patent References:
| JP2000128530A | ||||
| JP7011354A | ||||
| JP2014062304A | ||||
| JP2011208241A | ||||
| JP2012201901A | ||||
| JP2012201947A | ||||
| JP6330198A | ||||
| JP2014214360A | ||||
| JP2015124389A | ||||
| JP2015124388A | ||||
| JP50006513A |
Foreign References:
| CN102168182A |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi