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Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu

Abstract

In the refining process for the production of copper from pyrites, heat treatment is carried out in a neutral atmosphere so that part of the sulphur will be collected in the form of simple sulfur and that pyrites naturally low in reactivity will be made active. A basic study is also conducted of a very high speed electrolytic method. The chemical aspects of pyrites which are various in composition (mainly CuFeS2) are clarified by X-ray diffraction, and then is subjected to heat-treatment in a 773K-1073K argon atmosphere. There is a decrease in the amount of sulfur at a temperatures not lower than 973K. The X-ray main diffraction line splits for the emergence of some lower angle diffraction lines. The specimen is then subjected to a leach test in a copper chloride base liquor, to disclose that leachability grows remarkably higher in the presence of a great change in the X-ray diffraction lattice constant. An experiment follows in which an electrolyte is allowed to flow at a high speed for accelerating the rate of electrolytic refining in an effort to prevent the passivation of anode and deposition of dendrite on the cathode that is apt to occur when the current density  More>>
Authors:
Nakamura, T; Noguchi, F; Takasu, T; Ito, H [1] 
  1. Kyushu Inst. of Technology, Kitakyushu (Japan). Faculty of Engineering
Publication Date:
Feb 01, 1997
Product Type:
Conference
Report Number:
CONF-970283-
Reference Number:
SCA: 360101; PA: NEDO-97:820044; EDB-97:107231; SN: 97001821138
Resource Relation:
Conference: Report meeting for the results of `the publicly applied proposal type and hi-tech (emphasized) field research and development in fiscal 1995`, 1995 nendo teian kobogata saisentan (juten) bun`ya kenkyu kaihatsu seika hokokukai, Tokyo (Japan), 12-14 Feb 1997; Other Information: PBD: Feb 1997; Related Information: Is Part Of Preprint of the results of `the publicly applied proposal type and hi-tech (emphasized) field research and development in fiscal 1995`; PB: 469 p.; `1995 nendo teian kobogata saisentan (juten) bun`ya kenkyu kaihatsu` seika hokokukai yokoshu
Subject:
36 MATERIALS SCIENCE; CHALCOPYRITE; ORE PROCESSING; COPPER ORES; CALCINATION; METALLURGY; PH VALUE; SULFUR; ELECTROLYSIS; X-RAY DIFFRACTION; COPPER CHLORIDES; LEACHING; PASSIVATION; DENDRITES; ELECTRODEPOSITION; SULFURIC ACID
OSTI ID:
506682
Research Organizations:
New Energy and Industrial Technology Development Organization, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97757283; TRN: 97:820044
Availability:
Available from New Energy and Industrial Technology Development Organization, Sunshine 60, 30F 1-1, 3-chome, Higashi-Ikebukuro, Toshima-ku, Tokyo, Japan; OSTI as DE97757283
Submitting Site:
NEDO
Size:
pp. 406-407
Announcement Date:

Citation Formats

Nakamura, T, Noguchi, F, Takasu, T, and Ito, H. Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu. Japan: N. p., 1997. Web.
Nakamura, T, Noguchi, F, Takasu, T, & Ito, H. Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu. Japan.
Nakamura, T, Noguchi, F, Takasu, T, and Ito, H. 1997. "Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu." Japan.
@misc{etde_506682,
title = {Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu}
author = {Nakamura, T, Noguchi, F, Takasu, T, and Ito, H}
abstractNote = {In the refining process for the production of copper from pyrites, heat treatment is carried out in a neutral atmosphere so that part of the sulphur will be collected in the form of simple sulfur and that pyrites naturally low in reactivity will be made active. A basic study is also conducted of a very high speed electrolytic method. The chemical aspects of pyrites which are various in composition (mainly CuFeS2) are clarified by X-ray diffraction, and then is subjected to heat-treatment in a 773K-1073K argon atmosphere. There is a decrease in the amount of sulfur at a temperatures not lower than 973K. The X-ray main diffraction line splits for the emergence of some lower angle diffraction lines. The specimen is then subjected to a leach test in a copper chloride base liquor, to disclose that leachability grows remarkably higher in the presence of a great change in the X-ray diffraction lattice constant. An experiment follows in which an electrolyte is allowed to flow at a high speed for accelerating the rate of electrolytic refining in an effort to prevent the passivation of anode and deposition of dendrite on the cathode that is apt to occur when the current density is high. Passivation is prevented when the flow rate is 10m/min or higher in the vicinity of the anode surface for the formation of a smooth electrodeposited surface. 2 refs., 2 figs., 2 tabs.}
place = {Japan}
year = {1997}
month = {Feb}
}