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Whatsapp:+86 133 1927 7356
E-mail: chemicals@dasenmining.com
Add：Xifeng Fourth Road,Hi-Tech Industry Zone, Xi'an ,China
Postal Code:710000
Factors affecting lithium recovery and selectivity
Time: 2023-05-10 Source: Writer:
Three main difficulties in the practice of spodumene recovery exist at present:
1) Traditional collectors have low efficiency. The most commonly used collectors in industrial spodumene flotation include fatty acids and their soaps (731, naphthenic acid soap, oleic acid, tall oil, etc.), amine cationic collectors, and alkyl sulfates and sulonates. There are obvious defects in all of the above collectors. Using fatty acid collectors alone, for instance, requires a large amount and has a poor collection effect. Dispersion; the use conditions of alkyl sulfate and alkyl sulfonate are relatively harsh, and these collectors must be used in an acidic environment for spodumene separation. It has a strong collection ability, but at the same time it also has a strong collection ability for other silicate gangue minerals, and it has poor selectivity.
2) Most regulators are toxic, and their selectivity is poor. Spodumene minerals and silicate gangue minerals have similar planktonic properties. The key to the success of the flotation process lies in whether effective selective inhibition and activation of spodumene can be achieved in flotation practice. Mainly include: water glass, dextrin, starch, sodium fluoride, sodium sulfide, etc. These inhibitors not only have an inhibitory effect on gangue minerals, but also have a more obvious inhibitory effect on spodumene.
3) The existence of "inevitable ions" has an important impact on the flotation of spodumene. Due to the surface characteristics of different silicate minerals after crushing and the natural differences in the chemical characteristics of their mineral crystals, there are certain flotation differences in different flotation environments. As long as the separation conditions are well controlled, spodumene and other flotation can be achieved. Efficient separation of silicate gangue minerals. During the grinding process, due to the role of steel balls and liners in the operation, the surface of the mineral is polluted by a certain degree of iron, so that iron and its compounds are fixed on the surface of the mineral, and these "inevitable ions" are difficult to completely remove. In addition, the polyvalent metal cations present in the flotation water (especially backwater) will also have different effects on the flotation of silicate minerals (such as Ca2+, Mg2+, Fe3+, etc.). In industrial flotation practice, these "inevitable ions" play an important role in spodumene flotation.
In order to achieve high-precision separation of spodumene, it is necessary to select high-efficiency collectors and inhibitors, and overcome the influence of "inevitable ions."
1) Traditional collectors have low efficiency. The most commonly used collectors in industrial spodumene flotation include fatty acids and their soaps (731, naphthenic acid soap, oleic acid, tall oil, etc.), amine cationic collectors, and alkyl sulfates and sulonates. There are obvious defects in all of the above collectors. Using fatty acid collectors alone, for instance, requires a large amount and has a poor collection effect. Dispersion; the use conditions of alkyl sulfate and alkyl sulfonate are relatively harsh, and these collectors must be used in an acidic environment for spodumene separation. It has a strong collection ability, but at the same time it also has a strong collection ability for other silicate gangue minerals, and it has poor selectivity.
2) Most regulators are toxic, and their selectivity is poor. Spodumene minerals and silicate gangue minerals have similar planktonic properties. The key to the success of the flotation process lies in whether effective selective inhibition and activation of spodumene can be achieved in flotation practice. Mainly include: water glass, dextrin, starch, sodium fluoride, sodium sulfide, etc. These inhibitors not only have an inhibitory effect on gangue minerals, but also have a more obvious inhibitory effect on spodumene.
3) The existence of "inevitable ions" has an important impact on the flotation of spodumene. Due to the surface characteristics of different silicate minerals after crushing and the natural differences in the chemical characteristics of their mineral crystals, there are certain flotation differences in different flotation environments. As long as the separation conditions are well controlled, spodumene and other flotation can be achieved. Efficient separation of silicate gangue minerals. During the grinding process, due to the role of steel balls and liners in the operation, the surface of the mineral is polluted by a certain degree of iron, so that iron and its compounds are fixed on the surface of the mineral, and these "inevitable ions" are difficult to completely remove. In addition, the polyvalent metal cations present in the flotation water (especially backwater) will also have different effects on the flotation of silicate minerals (such as Ca2+, Mg2+, Fe3+, etc.). In industrial flotation practice, these "inevitable ions" play an important role in spodumene flotation.
In order to achieve high-precision separation of spodumene, it is necessary to select high-efficiency collectors and inhibitors, and overcome the influence of "inevitable ions."