This invention provides an ore powder ball of manganese ore and a method for preparation of it, which is characterized in that: the raw materials of the powdered ore ball are silicate cement, water and manganese ore powder, with the ball of ellipsoid, and the proportion between minor axis to long axis of it is 0.6-0.7. The grain size of it is not only homogeneous, but also can be adjusted by adjusting the dimension of rolling mould in accordance with need. And compared with roasting sintering process, this invention has lower investment in equipment, much simple process and lower energy consumption, so the cost of it can reduce by 30-40%. |