Pressure Leaching of Chalcopyrite Concentrate: Iron Removal from Leaching Residues

2020 ◽  
Vol 299 ◽  
pp. 1052-1057
Author(s):  
Aleksei Kritskii ◽  
Kirill Karimov ◽  
Stanislav Naboichenko

Autoclave oxidative leaching is one of the most promising hydrometallurgical approaches for copper suplhide materials processing. In previous studies [2–4], the possibility of an efficient autoclave treatment of chalcopyrite concentrate was confirmed. The concentrate has the following chemical composition, %: 21.5 Cu, 0.1 Zn, 26.5 S, 24.5 Fe, 0.05 Pb, 0.04 Ni, 16.2 SiO2 [1]. At high temperature conditions (190–200 °C; 4–6 bar) in sulfuric-acid media during 100–120 min about 98% Cu was extracted. A leaching residue after POX (POX-cake) contained the following compounds, %: 55 Fe2O3, 40 SiO2, 4 MeS2/MeS. Current paper presents the results on purification of POX-cakes from iron by autoclave treatment. Futher ways for by-products (SiO2-cake and FeSO4-solution) processing are sugested.

2017 ◽  
Vol 171 ◽  
pp. 165-171
Author(s):  
Hiroshi Nakazawa ◽  
Shin Koshiya ◽  
Hideki Kobayashi ◽  
Takashi Matsuhashi

2020 ◽  
pp. 19-24
Author(s):  
A. V. Kritskii ◽  
◽  
S. Jafari ◽  
P. Sinisalo ◽  
M. Lundström ◽  
...  

2018 ◽  
pp. 24-28 ◽  
Author(s):  
L. G. Elfimova ◽  
◽  
K. A. Karimov ◽  
A. V. Kritskiy ◽  
S. S. Naboychenko ◽  
...  

Metallurgist ◽  
2015 ◽  
Vol 59 (7-8) ◽  
pp. 723-726 ◽  
Author(s):  
K. A. Karimov ◽  
A. V. Kritskii ◽  
L. G. Elfimova ◽  
S. S. Naboichenko

2020 ◽  
Vol 299 ◽  
pp. 1109-1114
Author(s):  
Aleksei Kritskii ◽  
Kirill Karimov ◽  
Stanislav Naboichenko

Ural enrichment plants processing copper-porphyry deposits are produced chalcopyrite concentrates of the following chemical composition, %: 21.5 Cu, 0.1 Zn, 26.59 S, 24.52 Fe, 0.05 Pb, 0.04 Ni, 16.28 SiO2 [1]. According to previous studies [2, 3, 21], such concentrates can be effectively treated using pressure oxidative leaching (POX). At temperature of 190–200 °C, partial oxygen pressure 4–6 bar and [H2SO4] = 15–30 g / L during 100-120 min about 98 % Cu was extracted. In this paper, an inluence of chalcopyrite concentrate preliminary grinding on efficiency of the POX stage was studied. It was found that even the finest grinding of the particle size class P80 = 13 μm does not lead to significant intensification of process kinetics.


Alloy Digest ◽  
1958 ◽  
Vol 7 (5) ◽  

Abstract REVERE No. 430 is an aluminum bronze having high strength, excellent corrosion resistance, and high resistance to sulfuric acid. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-63. Producer or source: Revere Copper and Brass Inc..


Alloy Digest ◽  
2001 ◽  
Vol 50 (11) ◽  

Abstract Titanium shows outstanding resistance to seawater and marine atmospheres. It is also resistant to attack by hot metallic chloride solutions, sodium and potassium hypochlorite, and chlorine dioxide. The metal is resistant to attack by hot nitric acid at concentrations up to 80% and is not attacked by sulfuric acid. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: TI-122. Producer or source: Timet.


2006 ◽  
Vol 284 (1-2) ◽  
pp. 67-78 ◽  
Author(s):  
Le Xuan Tuan ◽  
M. Verbanck ◽  
C. Buess-Herman ◽  
H.D. Hurwitz

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