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

Abstract

The invention discloses a low-grade iron ore dressing technique and equipment in the ore dressing technical domain, which comprises the following steps: doing rough breaking and once fine breaking; proceeding dry cleaning and sieving; milling; separating; doing magnetic cobbing and high-frequency sieving; filtering; sieving twice for ore material; obtaining the product. The ore dressing equipment comprises the following parts: rough breaking machine, fine breaking machine, dry cleaning bolter, storage bin, ball mill, separatory machine, magnetic cobber, high-frequency sieve, filter, a set of wet rougher unit between the storage bin and the separatory machine, wherein the wet rougher unit contains band conveyer, twice bolter, wet fine grinder, wet bolter and wet rougher, which has strong magnetic cobber of wet rought particle iron ore with watering device; the wet fine breaker is wet hammer breaker; the sieving feeding machine has shaker screen with eccentric oscillating device. The invention improves the production by 1-2 times under the same energy consumption condition in comparison with the present technique and equipment, which utilizes the low-grade iron ore resource sufficiently.

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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