Roughing separation technique for low ore grade iron ore and mineral dressing equipment thereof

Abstract

The invention relates to the technical field of mineral processing, in particular to a low-grade iron ore roughing process and mineral processing equipment. The beneficiation process includes coarse crushing, primary fine crushing, and dry screening. The steps are as follows: secondary screening of ore materials, secondary fine crushing of the screened coarse ore, wet rough separation of fine materials, and selection of fine ore The raw material is coarsely selected iron ore products. The beneficiation equipment includes coarse crusher, fine crusher, dry screening machine and storage bin. After the storage bin, there is a set of wet roughing unit, including sequentially connected conveyor belt, secondary screening machine, wet fine crusher, wet type Sieving machines and wet roughing machines. The wet fine crusher is a wet hammer crusher, and the wet rough separator is a wet coarse iron ore strong magnetic separator equipped with a water adding device. The screening feeder is a vibrating screen with an eccentric vibrating device. Compared with the existing technology and equipment of the same scale, the production of the same low-grade iron ore can be sorted by 1-2 times under the same power consumption conditions, so as to make full use of low-grade iron ore resources.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a low-grade iron ore roughing process and mineral processing equipment. Background technique [0002] With the development of the iron and steel industry, the demand for iron ore, especially the demand for iron concentrate is increasing. Due to the limited reserves of rich iron ore resources, how to utilize the lean ore resources with abundant reserves has become a top priority. The current process of developing and utilizing lean ore resources includes the following steps: coarse crushing, fine crushing, dry separation and screening of iron ore, ball milling, material separation, magnetic separation, high frequency screening, secondary magnetic separation, dry separation and screening The separated waste residue is transported away, the tailings selected by magnetic separation are sent to the tailings dam, and the concentrate powder is sent to the concentrate pool. ...

AI Technical Summary

Problems solved by technology

This process is suitable for lean ore with a grade of about 20%, but when using iron ore with a grade of less than 15% for beneficiation, the productivity is too low and the cost is too high, especially when the grade is 4-8%. When the low-grade so-called soft iron ore formed by weathered rock and entrained with a large amount of soil is processed, it is impossible to obtain actual economic benefits at all.

Therefore, existing processes and equipment must be improved

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