Abstract: This text discussed an united-process that "magnetic separation-gravity separation——floation" should be adopted to iron concentrat which contain more sulfur.That can make the quantity of sulfur decrease to 0.24%.At the same time,we can have a separation to tails which contain more sulfur.Thus,we can get the sulfur concentrate containing sulfur 33.40%,that can reach the standard of nation for integration-utilizing cleaning technics with no rubbish.