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Leaching Gold Using Oxidation Products of Elemental Sulfur in Ca(OH)2 Solution Under Oxygen Pressure
gold leaching alkaline solution oxygen pressure
2009/11/16
A gold leaching process by using in situ oxidation products of added elemental sulfur in Ca(OH)2 solution was investigated. A gold concentrate containing 45 g/t Au was tested and 85%~87% of gold were ...
The thermal treatment of electric arc furnace dust under low gas phase pressure
EAFD zinc recovery reduced pressure
2009/10/23
The paper presents the results of laboratory tests on the process of thermal reduction of electric arc furnace dust (EAFD) in the temperature range from 1273 to 1473 K. Before proceeding to the experi...
The stress of machine parts for pressure die casting and dies that are in contact with liquid metal influencing their service life
Pressing sleeve Piston Die casting process Heat fatigue Service life Die temperature
2011/3/15
Stress of material surface at die, pressing sleeve and piston in pressure die casting process from liquid alloys is analysed. That is heat fatigue and heat and chemical effect of liquid alloys. The me...
Theory of similarity at pressure dies
Pressure dies casting Laminar flow Turbulent flow Coefficient of size similarity
2011/3/15
We get from equations for laminar and turbulent flow criterion equations containing competent criteria without size. Two processes at pressure die casting are similar when their corresponding criteria...
FERROUS ALLOYS CAST UNDER HIGH PRESSURE GAS ATMOSPHERE
Innovative foundry materials and technologies
2011/3/10
The main objective of this paper is describing the essence of the process of introducing nitrogen to the melt of ferrous alloys by application of overpressure above the metal bath. The problem was dis...