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How To Grinding Low-grade Coarse Aggregate

  • Because most of the coarse aggregates are distributed in fine or micro-fine particles, and there are quite a lot of high-phosphorus ore, high-iron ore, and associated metals, so it is quite difficult for aggretage mineral processing. At present, the grinding production line of coarse aggregate are mechanical separation (including ore washing, screening, gravity separation, strong magnetic separation, and flotation), pyro-concentration, chemical separation and so on.

    The distribution of coarse aggregate in the world is not only uneven, but also the grade of coarse aggregate varies greatly in different areas. Coarse aggregate-rich ore resources are mainly concentrated in South Africa, Gabon, Brazil and Australia.

    For example, the Kalahari mine in South Africa has a coarse aggregate grade of 30-50 percent, the Groote Eylandt mine in Australia has a coarse aggregate grade of 40-50 percent, and India, Kazakhstan and Mexico are medium-grade aggretage resource countries.

    The low-grade aggretage, about 35%-40 %, mainly in Ukraine, China and Ghana, it needs to be beneficiated and artificially enriched before it can be sold as a commodity ore (grade more than 35%).