What Kind of Role Does Collector Play In Lithium Ore Flotation
Shandong Xinhai Mining Technology & Equipment Inc.
Xinhai provides ore processing plant and full set equipment: Ball mill, Hydrocyclone, Flotation, Washing plant, CIP, CIL
The main processing methods?used for lithium ore separation include flotation, magnetic separation, dense medium separating, combined processing, etc., among which flotation is one of the most used processing methods.
During?lithium ore?flotation, the choice of collector for is the key to affect the flotation index of lithium ore. The collectors can be divided into anionic collectors, cationic collectors, combined collectors, new collectors, etc.
Ⅰ. Anion Collector?for Lithium Ore Flotation
The collection mechanism depends on the combination of particles on lithium particles surface and anion collectors. Under the suitable PH?value condition of flotation, the anion collector and spodumene surface interact through electrostatic force and chemical reaction, and have good selectivity.
The common anion collectors include sodium oleate, oxidized paraffin soap, naphthenic acid soap, sodium lauryl sulfate, hydroxamic acid, etc. These anion collectors act on lithium particles surface through different active groups. A single anion collector has good selectivity, but its collection capacity is weak. It can be used with a high-valent metal ion activator under strong alkaline conditions, and the activation selectivity can be adjusted by adjusting high-valent metal cations. In addition, fatty acid collectors such as oleic acid and oxidized paraffin soap are used in a large amount in the flotation, so they are not easy to dissolve and disperse in the pulp. It is necessary to adjust the pulp environment to be alkaline, and control the temperature.
Ⅱ. Cation Collector for Lithium Ore Flotation
The?cationic collectors include dodecylamine, tetradecylamine, hexadecylamine and its isomers, mixed amines and cocoamine, etc. The amine groups act on particles?surface?through electrostatic force or Van Der Waals force, requiring high valence metal cation and regulators to control the selectivity of particle activation. When performing thel flotation of lithium ore, the flotation capacity is good in a wide PH range, and the recovery rate of lithium is high, but the selectivity to different minerals is poor.
Ⅲ. Combined?Collector?for Lithium Ore Flotation
The combined?collectors can often play a greater role, resulting in co-adsorption?effect, lengthening of the hydrophobic end, and promoting?the adsorption. It can improve the concentrate grade, and some can reduce the dosage of chemicals or improve the flotation environment.?Lithium ore combined collectors mainly include anion-cation combination collectors, anion combination collectors, anion-nonion combination collectors, etc.
1. Anion-Cation Combined Collector
The anion-cation combined?collector has strong synergistic effect and surface activity in lithium ore flotation, and has good collection and selectivity. The commonly used combined collectors of this type are cationic collectors containing -NH2 structure and anionic collectors containing -COOH structure.
2. Anion Combined Collector
The anion combined collectors can improve the flotation environment, and enhance the performance of reagents through anionic active groups of different structures, with low cost and improved concentrate indicators.
3. Anion-Nonionic combined collector
In the flotation of silicate-type lithium minerals, anion-nonionic combined collector can play a good role. Nonionic collectors have large molecules, and when combined with anioncollectors, they act as a synergist to promote anion collection. The collector dissolves and disperses in the flotation solution, reduces the critical micelle concentration of the collector, and improves the flotation performance.
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Ⅳ. New Collector for Lithium Ore Flotation
New collectors for lithium ore flotation mainly include amphoteric collectors and chelating collectors.
The amphoteric collector contains both anionic and cationic functional groups, and this heterosexual active group structure strengthens the performance of the collector.
The mechanism of chelating collectors is that the collectors form ligands in the solution have a strong bond with metal cations Al3+, Si4+, Ca2+, forming?stable chelates. This kind collector mainly interacts with the mineral surface through chemical reaction, and has strong collection and selection capabilities.
The above is about the introduction of lithium ore flotation collector. The collectors’?performance?is closely related to the differences in the physical and chemical properties of lithium minerals and gangue minerals. Therefore, when selecting collectors, it is necessary to?pay more attention to the specific properties of the ore, select a suitable collector according to ore dressing?test results?to obtain better economic benefits.
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