Test research on beneficiation of refractory oolitic hematite in hebei area

With the feature of finely-dissemination particle and complex mineral composition, ollitic hematite is considered to be a difficult problem of mineral processing in the world. The paper presents series research on refractory oolitic hematite in HeBei Area as following:ore quality、technology mineralogy and mineral processing technolgy. The survey shows:with the fine grinding of the hematite to a fineness of-0.076mm 95%,getting iron concentrate having a grade of 62.74% and a recovery of 46.80% by high intesity magnetic separation- reverse flotation flowsheet; getting a period achievement with the iron concentrate having a grade of 61.09% and a recovery of 45% by the four times intensity magnetic separation, four times grinding and four times gravity separation; with roasting temperature of 800℃, roasting time of 75-90min and ore-coal ratio of 11, by roasting- magnetic separation flowsheet geting the iron concentrate having a grade of 62.74% and a recovery of 87%. So far, this reseach is still doing for the target of raising the concentration recovery on the base of high grade concentrate. The final target is to make full use of the hematite in HeBei Area.