How To Improve Fine Iron Ore Beneficiation?

2023-04-23

In the steel industry, a stable supply of iron ore is very important. With the continuous advancement of science and technology, the research on the comprehensive utilization of fine-grained iron ore is of great significance to expand the amount of iron ore resources used by industry and ensure the safe supply of iron ore resources. In the development of fine-grained iron ore beneficiation, these five aspects need to be paid attention to.

1. Selective and efficient grinding

The key point of selective and high-efficiency grinding is to increase the effective fraction content that is beneficial to separation. Therefore, it is of great significance to carry out targeted grinding on fine-grained iron ore. The dissociated qualified materials can be classified as soon as possible to reduce over-grinding and improve grinding efficiency. Effective selective grinding can increase the fineness of coarse grinding and reduce over-grinding, so as to optimize the mineral composition of the selected materials and achieve the purpose of improving both grade and recovery rate.

2. Ultrafine Grinding Technology

In order to achieve the purpose of high-efficiency fine grinding, it can be achieved by changing the structure of the ball mill, the shape of the mill liner, and the shape of the grinding medium. Due to the large power consumption of the ball mill itself, it also affects the particle size range of the grinding product. In the grinding of fine-grained iron ore, the grinding efficiency is lower and the energy consumption is higher. When the particle size distribution of the grinding product is wide, the phenomenon of over-grinding will be more serious. Therefore, a more suitable type of mill for fine grinding is required to improve the particle size composition of the grinding product and reduce energy consumption.

3. Strong Magnetic Separation Technology

Strong magnetic separation technology is mainly reflected in the selection and use of strong magnetic separators, among which vertical ring pulsating high gradient strong magnetic separators and flat ring strong magnetic separators are widely used in the application of fine-grained weak magnetite. During sorting, the pulsation mechanism drives the pulp to generate pulsation, so that the ore particle group in the sorting area remains in a loose state, making the magnetic particles easier to be captured by the magnetic medium. Non-magnetic particles pass through the magnetic medium as quickly as possible and enter the tailings. The flat-ring type strong magnetic separator has a higher separation magnetic field strength, which has a good recovery effect on fine-grained minerals and a high recovery rate.