Mixed concentrate deionization method
To improve the separation, the mixed multi-metallic ore flotation concentrate obtained, must be separated prior to flotation, it is necessary release agent, an agent to remove excess slurry and collector membrane in mineral surfaces, bulk concentrate drug release The methods can be divided into three categories: mechanical methods, chemical methods, physical and chemical methods, and special methods.
1. Mechanical de-dosing method This method mainly includes re-grinding, concentration and filtration washing.
(1) Mixed concentrate regrind. The main effect of regrind is to solve the monomer dissociation of minerals in the mixed concentrate, but it is also possible to peel off a part of the agent. Have a certain drug withdrawal.
(2) Concentrated drug removal. When the mixed concentrate is concentrated, the excess agent in the slurry can be removed, and the concentration can be concentrated with a thickener or a hydrocyclone.
(3) Filtration washing method. The mixed concentrate is concentrated and filtered, and sprayed on the filter to wash the water, and then the filter cake is floated and floated. This is the most thorough method in the mechanical de-peeling method, but it is troublesome.
2. Chemical and physical chemistry
(1) Sodium sulfide desorption method. Sodium sulfide can desorb the collector film on the mineral surface, and the drug is relatively completely removed. However, due to the large amount of sodium sulfide, it must be concentrated and filtered after chemical removal (ie, chemical and mechanical combined drug removal) to remove the remaining sodium sulfide. Otherwise, the sulfide ore will be removed. Suppressed.
(2) Activated carbon desorption method. By utilizing the adsorption properties of activated carbon, it is possible to adsorb excess agent in the slurry and promote the desorption of the agent from the mineral surface. This method is not as thorough as the sodium sulfide method, but it is convenient to use.
3. Special Law This method is some methods other than the above two methods.
(1) Heating method. In the separation of mixed concentrates, it has been widely used.
(2) Calcination method. This method has been used in the separation of copper- molybdenum mixed concentrates. The collector film on the mineral surface is destroyed during the calcination process and the surface of the copper mineral is oxidized. Mixing the calcined concentrate repulped with coal oil floats molybdenite.
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