A hematite rough concent rate with a grade 56.00%and recovery83.36%was obtained by adding 30%bla ck liquor,which was treated with H 2 SO 4 ,into the pulp.

• 用H2SO4和某种氧化剂将黑液处理后并按30%25的体积比加入矿浆中；可得品位56.；00%25、回收率83