Lepidolite flotation technology without desliming

Lepidolite is one of the main sources of lithium extraction. At present, the commonly used lepidolite beneficiation method is mainly flotation. The crushing and grinding processes in the process will produce ore slime, which affects the flotation effect of lithium. The usual desliming flotation process of lepidolite is weak in the treatment of ore slime, resulting in waste of lepidolite. This article will introduce you to a lepidolite flotation technology without desliming.

01Lepidolite ore grinding and scavenging process

1. Rough grinding: After the lepidolite ore is crushed and screened, the above-screen product is sent to the ball mill for grinding;

2. Roughing: The grinding product and the under-screen product are sent to the flotation machine for flotation, the feed concentration is maintained at 30%-40%, the pH value of the pulp is maintained at 6.5-7.5, inhibitors, collectors and polymer flocculants are added to the pulp, and after fully mixing with the pulp, the roughing concentrate and roughing tailings are obtained.

3. Scavenging: After the roughing tailings are fully mixed with the collector, the foam is scraped off by aeration to obtain the scavenging foam product and scavenging tailings. The scavenging foam product can be returned to the roughing process for re-roughing.

02Lepidolite roughing concentrate process

The roughing concentrate is to obtain lepidolite concentrate by aerating and scraping the foam after the inhibitor is fully mixed. The selection operation can be divided into two stages.

1. Primary selection: The roughing concentrate is sent to the primary selection flotation operation. After adding inhibitors and stirring sufficiently, aeration and scraping are performed to obtain primary selection foam products and primary intermediate ore products. The intermediate ore products are sent to the roughing process for further processing.

2. Secondary selection: The primary selection foam products are sent to the secondary selection for flotation. After stirring and mixing sufficiently, aeration and scraping are performed to obtain lithium mica concentrate and secondary intermediate ore products. The intermediate ore products produced by the secondary selection are sent to the primary selection operation for processing.

The above content is the process flow of non-de-sliming flotation of lithium mica. The polymer inhibitor polyacrylamide or other polymers used in flotation. The inhibitor can be composed of water glass and sodium hexametaphosphate in a certain mass ratio. The collector can be coconut amine and emulsified oleic acid. This non-de-sliming lithium mica flotation process mainly utilizes the good floatability of lithium mica in a wide pH range, adopts the combination of inhibitors, collectors and selective polymer flocculants, and uses flocculation flotation method to complete non-de-sliming flotation under simple sorting process flow.

After treatment, the quality of lithium mica concentrate is improved, and the recovery rate of lithium is further improved, which well solves the defect of low recovery rate of lithium mica in lithium mica desliming and sorting process. Xinhai can tailor-make lithium mica flotation process and complete set of equipment for you.