Product Description

Flotation process
The theoretical basis of various flotation processes is basically the same, that is, due to the hydrophobic characteristics of the surface of the ore particles or the hydrophobic (gas or oil) characteristics obtained after the action of flotation agents, aggregation can occur at the liquid-gas or water-oil interface.At present, foam flotation is the most widely used method.The ore is broken and ground to dissociate various minerals into monomer particles, and the particle size is in line with the requirements of flotation process.Various flotation agents are added to the ore slurry after grinding and mixed to make it interact with mineral particles so as to expand the difference of floatability between different mineral particles.The slurry is sent into the flotation tank, stirred and inflated.The ore particles in the slurry contact and collide with the bubbles, and the ore particles with good buoyancy can selectively adhere to the bubbles and be carried up into a mineralized foam layer composed of gas-liquid-solid three phases, which is mechanically scraped or overflow from the slurry surface and then dehydrated and dried into concentrate products.The non-floating gangue and other mineral particles are discharged from the bottom of the flotation tank as tailings with the slurry. FIG. 1 is a schematic diagram of the foam flotation process.Sometimes, the useless mineral particles will surface, useful mineral particles in the pulp, known as reverse flotation, such as quartz from iron ore surface.

Flotation process equipments
Flotation process by jaw crusher, ball mill, classifier, magnetic separator, flotation machine, concentrator and dryer and other main equipment, with ore feeder, hoist, conveyor, vibrating screen can form a complete ore processing line.The production line has the advantages of high efficiency, low energy, high processing capacity, economical and reasonable.

Grinding fineness test
The recovery rate of lead and zinc increased significantly with the improvement of grinding fineness. When the grinding fineness reached *0.**4mm and *5%, the recovery rate of lead and zinc almost reached the maximum at the same time.Continue to improve the fineness of grinding products, lead, zinc recovery began to decline slightly.Therefore, the appropriate grinding fineness of the lead-zinc ore is *0.**4mm, accounting for *5%.
Flotation condition test: the flotation condition test of galena ore includes Na2CO3 dosage test and butyl yellow drug dosage test, the flotation condition test of white lead ore includes Na2S dosage test and butyl yellow drug dosage test, and the flotation condition test of heteropolar ore includes Na2S dosage test and phenylthiophenol dosage test.
Closed-circuit test
For the lead and zinc ores which are easy to grind and pulverize and have fine grain size, the floatability of the same mineral can be effectively reduced and the separation index can be improved by using the graded sulfide flotation process and the difference of floatability of the same mineral.While Na2S sulfide white lead ore, a small number of heteropolar ore with good activity and difficult to be inhibited by zinc sulfate and sodium sulfite are also sulfide, and thus float up with white lead ore, resulting in white lead concentrate containing up to *9.*0% zinc.

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