The reason for the difficulty in recycling spodumene

1950s, sixties study of spodumene flotation principle and sorting process more domestic and foreign, is also more fully, the last decade, the study of the basic principles of mineral processing and other properties of the concrete Ore at home and abroad by leaps and bounds Great achievements have been made, but there are few studies on spodumene, far behind the research on the sorting nature of other ores. In summary,

At present, there are three main difficulties in the practice of spodumene recycling:

1) The collector is still using a traditional potency agent with low potency. Collectors commonly used in the practice of spodumene flotation industry are: fatty acids and their soaps (731, naphthenic acid soap, oleic acid, tal oil, etc.), amine cation collectors, and alkyl sulfates. And sulfonates and the like. There are obvious defects in the above collectors. For example, fatty acid collectors are not only required to be used in large amounts, but also have a poor collection effect when used alone. They need to be used in combination with various collectors, and are sensitive to temperature and are not easily dissolved. Dispersion ; the use conditions of alkyl sulfates and alkyl sulfonates are harsh, such collectors need to be effective in the selection of spodumene in an acidic environment; and the amine collectors are spodumene. It has a strong ability to capture, but at the same time it has a strong ability to capture other silicate-like gangue minerals with poor selectivity.

2) The modifier has poor selectivity and is mostly toxic. The sprigidity of spodumene minerals and silicate-like gangue minerals is similar. The key to the success of flotation process is the effective selective inhibition and activation of spodumene 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 an obvious inhibitory effect on spodumene.

3) The existence of "inevitable ions" has an important influence on the spodumene flotation. Due to the surface characteristics of different silicate minerals after fracture 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 controlled, spodumene and others can be realized. Effective separation of silicate-like gangue minerals. During the grinding process, due to the role of steel balls and linings in the operation, the mineral surface is contaminated with a certain degree of iron , so that iron and its compounds are fixed on the mineral surface, and these "inevitable ions" are difficult to completely remove. Effects of mineral sorting a large extent; Further, the flotation water (particularly backwater) multivalent metal cations present in itself will produce different effects on the flotation of silicate minerals (e.g., Ca2 +, Mg2 + , Fe3+, etc.). Therefore, in the practice of industrial flotation, the above "inevitable ions" have an important influence on spodumene flotation.

It can be seen that the high-precision sorting of spodumene must be achieved by solving the basic problems of the selection of high-efficiency collectors and inhibitors, and the elimination of the influence of “inevitable ions”.

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