关键词: 球磨机排矿, 旋流器沉砂, 筛分, 机制砂

Abstract: In order to extend the service life of tailings pond for an iron ore, it is decided to carry out the process technology of extracting manufactured sand from products produced by first stage grinding graded system in an iron ore. The results showed that the tailings yield in magnetic separation for ball mill discharge from one-stage ball mill reached between 31.30% and 34.90%, in which the grain yield of +0.38 mm that meets the requirement of sand size is about 20%. The iron recovered by regrinding and reseparation of the grain size is of little value and is sold directly. However, it can not only increase the economic benefit of the enterprise by about 30 million yuan per year, but also help to reduce the discharge of fine tailings by about 3 million ton per year when sold as machine-made sand, at the same time, prolonging the service life of the tailings pond.

Key words: ball mill discharge, cyclone underflow, screening, manufactured sand