In order to eliminate pollution, improve process indicators, and gradually develop a method. The first with steam mixed Cu-Pb concentrate was warmed to about 60 ℃, in acidic and neutral pulp, brass can be improved floating mine, galena is suppressed. There is no need to add other chemicals during the sorting process. The obtained copper concentrate has high grade and low Pb and Zn. It can reduce environmental pollution because it does not need to be added with chemicals. The mechanism of heating and sorting is considered to selectively desorb the surface of galena. The collector and make its surface oxygen hydrophilic.
In addition to the warming separation without dosing, there is also a warm separation of the inhibitor. When such a mixture of copper and lead concentrates mineral separation plant, steam heating of pulp, added Na 2 CrO 4 as inhibitor. The control conditions are: temperature 60 ° C, pH = 7.5 ~ 8. Na 2 CrO 4 1.5 kg/t.
Dai concentrator within Japan Kosaka complex of zinc sulfide ores of copper and lead, which separation of copper and lead concentrate by mixing warming method. The production process is shown in Figure 1. The copper-lead mixed concentrate is steamed in a stirred tank for 10 min, the temperature is 60-70 ° C, and its pH is controlled by sulfuric acid and lime = 5 to 5.5. The copper concentrate obtained by adding no agent during copper flotation contains Cu 28.80%. Lead concentrate contains 52.68% Pb. Copper concentrates are of higher quality and lead concentrates are of lower quality because this process causes zinc in the mixed concentrate to enter the lead concentrate.
Figure 1 Copper and lead separation process of antimony ore in Japan
Zinc Die Casting Products are a metal forming process in which molten zinc metal is put under pressure and injected into a die.
Zinc are alloys that have high strength and hardness, outstanding corrosion resistance,full recyclability, mechanical properties, high thermal and electrical conductivity and strength at high temperatures. Zinc alloys possess high dimensional stability for complex shapes and excellent thin walls. The cost of raw material is low.
Zinc Die Casting Products are efficient and economical and offers a wide range of durable shapes and components. Little or no machining is required after a part is die casted, because the process provides very close tolerances for even complex shapes. Zinc Die Castings can also be easily plated or finished. Zinc Die Casting Products are dimensionally stable and heat resistant.
Although this alloy exhibits excellent casting characteristics, it has seen limited use by die casters. It does however possess some interesting characteristics that may be of assistance to designers. Its creep performance is rated higher than the other zinc alloys and it maintains higher strength and hardness levels after long-term aging.
The behavior of zinc alloys under stress is non-linear and time-temperature dependent on strain-rate, i.e. the ratio of stress to strain is not constant, even at low stresses, and varies with time resulting in continuous plastic flow under constant applied load. Designers of structural components should be aware of the creep limitations of zinc alloys, which do not have a single value for elastic modulus or yield strength. Yield strength (allowable stress) under sustained loading is dependent on the allowable design strain (% elongation) over the required service life. Working values for the elastic modulus and yield strength are important for design purposes. Standard engineering formulae used for calculating cross-sections of elastic materials must therefore be used with some caution.
This alloy exhibits excellent damping capacity and vibration attenuation in comparison with Aluminum Die Casting alloys.
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