What are the commonly used collectors for spodumene flotation?

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Lithium plays an important role in the national economy and national defense construction because of its unique physical and chemical properties, and is an important strategic material. Lithium resources mainly come from salt lake lithium, spodumene and lepidolite. Among them, spodumene is currently the main resource for extracting lithium. Flotation is often used for separation. Therefore, the selection of mineral processing agents is very important. The following editor will introduce it to you. , What are the commonly used collectors in spodumene flotation operations? how to choose? Currently, there are two types of applicable spodumene flotation collectors: single collectors and combination collectors.

1. Commonly used single collectors for spodumene

In spodumene flotation, commonly used The traditional single collectors include oleic acid, sodium oleate, dodecamine, oxidized paraffin soap, naphthenic acid soap, sodium lauryl sulfate, hydroxamic acid, etc.

Among them, dodecaamine is used to flotate spodumene. Without adding any regulator, dodecaamine can make spodumene float in a wide pH range (pH=2~12). The stone recovery rate is greater than 90%; when using sodium oleate as the collector and calcium chloride as the activator, flotation of spodumene single mineral can obtain a recovery rate of 43.36%; using oxidized paraffin soap as the collector Agent, under the condition of pH=10.5~11.5, a spodumene concentrate with a recovery rate of 80.77% was obtained; using oxidized paraffin soap as the collector, through closed-circuit process flotation, a spodumene concentrate with a recovery rate of 86.5% could be obtained Stone concentrate;

Although the traditional single collector is cheap and easy to obtain, it has poor selectivity, is not resistant to low temperatures, and requires a large amount of dosage. For complex actual minerals, it is difficult to obtain good flotation indicators through a simple process with a single collector.

2. Combined collectors

Currently, combined collectors are mostly used in spodumene flotation. When different collectors are combined according to a certain proportion, they will produce co-adsorption, lengthen the hydrophobic end, promote adsorption and improve the solution environment, etc., so that the combined collectors have a synergistic effect, making them have better capture properties than a single collector. Get results.

The main combination method of spodumene collector is to use naphthenic acid soap and oxidized paraffin soap as combined collectors. 1. Coarse 2. Sweep flotation process can obtain spodumene concentrate with a recovery rate of 85.88%; use SX (which is dodecylamine and oxidized paraffin soap) as a combined collector to selectively grind and strengthen spodumene. The flotation process adopts 1 crude 3 fine 1 sweep closed-circuit flow flotation to obtain spodumene concentrate with a recovery rate of 79.52%; using oxidized paraffin soap and tall oil as a combined collector, the role of the combined collector is Under this condition, the separation of spodumene and gangue minerals quartz and feldspar was effectively improved, and a lithium concentrate with a recovery rate of 87.37% was obtained.

Using dodecaamine and sodium oleate as a combined collector, when the material ratio of sodium oleate and dodecaamine is 6 to 10 and the pH is 8.5, lithium can be effectively removed Separation of pyroxene and feldspar; using SD-5 as a new high-efficiency combined collector, using a closed-circuit process of pre-settlement desliming, 1 coarse, 3 fine, 2 sweep and sequential return of medium ore, spodumene with a recovery rate of 86.01% can be obtained Concentrate; using a new mixed collector plus auxiliary collector, under low-temperature stirring water conditions of 16~22 ℃, through the process of 2 coarse, 2 sweep, and medium ore sequential return, spodumene with a recovery rate of 85.28% can be obtained Stone concentrate.

In the flotation of spodumene, the combined collectors mainly use traditional single collectors such as oleic acid (sodium), oxidized paraffin soap, naphthenic acid (soap), and dodecaamine according to certain conditions. The ratio is partly composed of a combination of new chemicals and traditional single collectors. After the collectors are used in combination, a synergistic effect is produced and the performance of the collectors is significantly improved.

In addition, there are some new collectors, such as EM-PN5, HZ-1, OPS-3, etc., which have good selectivity for spodumene and strong collection performance. However, there is currently little research and development and application of new collectors. The research and development of new spodumene collectors still has broad room for development.