Product Knowledge

Introduction of Mineral Processing Methods

author:dahua1 time:2019-05-30

Different types of ores may need different mineral processing methods. In this text, Luoyang Dahua will introduce some detailed beneficiation methods for all customers. 

1. Gravity concentration

This method can be widely applied to processing coal, nonferrous metal, rare metals, noble metals, asbestos, adamas and other nonmetallic minerals. Gravity concentration can process various metals according to the differences of relative density. Such minerals with different density can produce appropriate loose layer and separation condition by action of fluid force and various mechanical forces in the movable media (water, air and heavy-fluid). Sometimes, a spiral chute, centrifugal machine, cyclone can be used for strengthening the separation of fine materials. The production line is divided into crushing, screening, grinding, classification, flotation, dewatering and tailings disposal.

2. Flotation process

Flotation is a process of separating minerals by differences of physical and chemical properties, which is widely used for separating sulfide minerals( gold ore, silver ore, galena, sphalerite, chalcopyrite, chalcocite, molybdenite), metals and oxide minerals(uranium deposit),etc. Some metals should be processed with a flotation method, such as copper, lead, zinc and molybdenum, etc. Furthermore, some ferrous metals, rare metals and nonmetallic minerals can be also available for flotation. According to the differences of physical and chemical properties of minerals, valued minerals can attach to the foams with flotation reagent, so that separation can be realized.

Flotation is suitable for processing fine particles and minute materials, so minute particles with less than 10μm can be recovered. The whole production line can be divided into crushing & screening, grinding & classification, flotation, dehydration & drying of concentrate and treatment of tailings.

3. Magnetic separation

Magnetic separation is mainly used for screening ferrous metals (iron, manganese, and chrome), nonferrous metals and rare metals. The whole process contains: the crushed ores are conveyed to vibrating screen for screening and then to grinding and classification equipment for fine grinding. Minerals separated from gangue enter magnetic separation equipment for concentrate. Its working principle is that after grinding and classification, screened products are conveyed by a belt conveyor to next magnetic separating stage for the qualified fineness. Then minerals are conveyed to the permanent magnetic dewatering tank for concentrate and then concentrate will enter permanent magnetic drum for a second magnetic separation. The concentrate after filtration and drying are conveyed to warehouse for storage.

Dahua can provide a variety of mineral processing production line in line with different characteristics of ores. We can offer professional and excellent service for customers.

For more information, you can click: