When the crude ore contains copper 1.84%, the technical indexes such as the grade of copper concentrate 22.37% and the recovery 78.70% are obtained by use of single-stage grinding, one time of roughing, three times of scavenging and two times of cleaning.

• 当原矿含铜1.；84%25时，经过一段磨矿、一次粗选、三次扫选和二次精选，获得铜精矿品位22