Beneficiation combined method and system for comprehensively recovered associated iron phosphate minerals

Abstract

The invention discloses a beneficiation combined method and a system for comprehensively recovered associated iron phosphate minerals. The method comprises the steps of internally crushing the iron phosphate minerals through a crusher; sequentially carrying out 0.35mm to 0.45mm particle-size coarse crushing, 0.1mm to 0.15mm intermediate crushing, and 0.05mm to 0.09mm fine crushing; screening the fine-crushed powder ore, and obtaining undersize dried powdered ore and plus sieve powdered ore; placing the undersize dried powdered ore into a screening machine with a 0.4T to 1.2T high-intensity magnetic field, screening to obtain magnetic iron ore particles and powder, carrying out magnetic separation to screening a first dried iron ore concentrate, a first dried middling ore, and a first driedtailing, and returning the plus sieve powered ore back to the fine crushing step. The powered ore is dry-screened through sequentially carrying out the technological processes such as coarse crushing, intermediate crushing, fine crushing, screening, and dry screening on raw ore, so that the grinding particle size fineness is improved, the aim of more crushing and less grinding is achieved, the energy consumption and other raw material consumption during the mineral processing process are greatly reduced, the beneficiation cost is reduced, and the economic benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of efficient development of ultra-low-grade ore resources and comprehensive utilization of associated ores, and in particular relates to a combined mineral processing method and system for comprehensively recovering associated iron and phosphorus minerals. Background technique [0002] In the past 20 years, with the development of industries such as automobiles, petroleum, microelectronics, national defense, aviation and aerospace, users have continuously increased their requirements for steel quality and composition control, resulting in clean steel production becoming the core content of steelmaking technology development, of which phosphorus Content control is one of the key factors. Many steel grades require w[P] to be less than 0.01% or 0.005%, while ultra-low phosphorus steel requires w[P]≤50×10-6. In recent years, global iron ore prices have risen, forcing China to pay attention to the development an...

AI Technical Summary

Problems solved by technology

For low-grade magnetite ore, discarding massive ore cannot fully remove a large number of gangue minerals, and it is easy to throw out useful minerals, which is difficult to achieve the purpose of greatly reducing production costs

Moreover, in the phosphate rock flotation process, the conventional phosphate rock flotation temperature is 37°C. According to this condition, the heat load of the flotation workshop is huge.