The potential-pH diagram of Li-Co-H2O system provided the theoretical foundati on for synthesizing LiCoO2 using soft-chemical method in aqueous solution and re covering valuable metals by hydrometallurgical method.
The experimental investigation has been conducted to extract Mo, Co, Bi and Ni from the spent Mo-Co catalyst, i.e. alkali leaching for recovering Mo first and acid leaching for separating Co, Bi and Ni afterwards, thus recovering effectively the valuable metals in the spent Mo-Co catalyst.
The potential-pH diagram of Li-Co-H2O system provided the theoretical foundati on for synthesizing LiCoO2 using soft-chemical method in aqueous solution and re covering valuable metals by hydrometallurgical method.
The experimental investigation has been conducted to extract Mo, Co, Bi and Ni from the spent Mo-Co catalyst, i.e. alkali leaching for recovering Mo first and acid leaching for separating Co, Bi and Ni afterwards, thus recovering effectively the valuable metals in the spent Mo-Co catalyst.
It is described the extraction of valuable metals such as Ir, Be, Ag and Mo from minerals using silicate bacteria and the application of silicate bacteria in silicon-removal from bauxite in recent years, and the advances in morphological study of silicate bacteria are introduced. It is pointed out that great attention should be given to the investigations of molecular biology of silicate bacteria and the exploration of action mechanism between silicate bacteria and minerals.
This paper analyzed the mechanism of precipitation floatation, discussed the technology of selective precipitation floatation, the method of sulfide precipitation floatation can treat wastewater containing heavy metal ion and reclaim valuable metals.
Continuous ion exchange process(CIX)is particularly suited to the recovery of Uranium and other valuable metals from lean ores, and has been extensively applied and developed in the extractive metallurgy over the last decade.
Continuous ion exchange process (CIX) is particularly suited to the recovery of Uranium and other valuable metals from lean ores, and has been extensively applied and developed in the extractive metallurgy o-ver the last decade.
Continuous ion exchange process(CIX) is particularly suited to the recovery of uranium and other valuable metals from lean ores, and has been extensively applied and developed in the extractive metallurgy over the last decade.
It is indicated by the results that the extraction rate of nickel,copper and cobalt are up to 98%,98% and 90%,and the concentrations of valuable metals are up to 10～12g/L for Cu,13～15g/L for Ni and 2～3g/L for Co,respectively,under the condition of 50% solids concentration in charge and 25～30g/L total ions concentration in ammonia leaching solution.
A mixed nitric-sulphuric acids is used to recover the valuable metals Ni,Cu and Co from low-grade Ni-Cu sulfide tailings,the leaching rate of Ni,Cu,and Co is 91.5%,85.0% and 54.6% respectively under laboratory conditions.
Process conditions may be tailored to achieve the maximum economic recovery of valuable metals and to yield a product composition that is suitable for downstream processing requirements.
This research was carried out to recover some valuable metals from the electrodes of spent mobile phone batteries by leaching process in laboratory scale.
Hydrometallurgical extraction of metals is an important widely practiced technology in the metallurgical industry for treating both primary and secondary resources of valuable metals.
This paper describes the flotation-precipitation process which has been used to purify the mill effluents,in which the contents of Pb,Zn,Cu,Sb,As,Cd,CN~-and xanthate exceed the national industrial water discharge standard.Effluents can be purified under the standard of industrial water discharge only by conventional, inexpensive reagents and concurrently,some valuable metals can be recovered from the effluents. The effluents contain(rag/1):3.75 Cu,80.78 Pb,31.75 Zn,20.90 Fe,0.33 Cd, 58.33 Sb,2.5...
Wet air oxidation process is one for treating spent special steels pickling liquor to recover acid in an indirect way acid and valuable metals. In the process, first step is taken by making use of free acid in spent liquor to dissolve waste slag obtained during special steel processing. Thus, overall acidity of the spent liquor is reduced and recovery of valuable metals are augmented. Then wet air oxidation is conducted by introducing compressed air into the spent liquor in presence ...
It is of great economic significance to recover valuable metals from superalloy scrap containing refractory metals such as tungsten,molybdenum, chromium,vanadium.niobium,and tantalum and base metals such as iron.cobalt. nickel and copper. Usually, scrap materials have been contaminated with cutting oils containing phosphorus. The thermodynamic analysis on eliminating phosphorus in the carbonate aqueous system for recovering metals from superalloy scrap with the soda calcination...
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