Title:
銅精鉱の焙焼条件の決定方法、及び銅精鉱の焙焼方法
Document Type and Number:
Japanese Patent JP7179665
Kind Code:
B2
Abstract:
This method for determining roasting conditions of copper concentrates is characterized by comprising: a step for roasting arsenic-containing copper concentrates in a furnace while supplying oxygen-containing gas to the furnace, to cause a reaction of volatilizing the arsenic from the copper concentrates; a step for measuring an oxygen partial pressure in the gas exhausted from the furnace with a zirconia oxygen analyzer; and a step for determining that the reaction ends when a period during which the oxygen partial pressure is at most 10-14 atm continues for a given time and thereafter the rate of increase in the oxygen partial pressure exceeds a given value.
Inventors:
Matsuda Dai
Application Number:
JP2019066604A
Publication Date:
November 29, 2022
Filing Date:
March 29, 2019
Export Citation:
Assignee:
JX Nippon Mining & Metals Co., Ltd.
International Classes:
C22B15/00; C22B1/00; C22B1/02
Domestic Patent References:
| JP2015196848A |
Attorney, Agent or Firm:
Shuhei Katayama