Such collectors , such as 8 -hydroxyquinoline, have the structural formula:
It is an amphoteric collector, various metal ions and 8 - hydroxyquinoline different values within the range of PH, may form a precipitate exceeds this range, some precipitate redissolved. It is currently used for sorting some rare metal ores.
Nickel reagent (dimethyl acetaldehyde oxime):
CH 3 | CH 3 | |
- | - | |
C | - | C |
‖ | ‖ | |
HON | HON |
Nickel catalyst having a good collecting capacity of brass ore, chalcocite, bornite, and copper mineral malachite. It can also effectively capture other unvulcanized copper oxide minerals.
In recent years, China's research on complex collectors has focused on hydroxamic acid derivatives, including C 5-9 hydroxamic acid, ammonium cycloalkyl hydroxamate, phenyl hydroxamic acid, potassium salicyl hydroxamate, styrene hydroxamic acid; beryllium for lithium niobium composite mineral flotation, fine clay, titanium iron ore, rare earth ore, iron oxide, tantalum and niobium ore. Among them, the Baotou rare earth coarse concentrate is the first to obtain high-quality rare earth concentrates due to the use of hydroxamic acid as a collector. The rare earth grade is over 60% and the recovery rate is above 70% .
The Kunming Institute of Metallurgy carried out the synthesis and expansion test of benzotriazole for beneficiation . It has obtained good results in the flotation of copper oxide ore.
In recent years, research on sulfide mineral complex collectors has been active in foreign countries. For example, the malachite and magnesite are separated by salicylaldehyde oxime, and the cyanite is sorted from the quartz gangue with cis- 5 -fluorenyl- 2 -oxindole xylene ketone, and the thiobarbituric acid is used as the inhibitor. Copper- molybdenum ore is selected.
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