用赤泥提高铁尾矿热活化性能的试验研究

Study on Heat-Activation Property of Iron Tailing by Red Mud

为提高铁尾矿的活性，使其能作为水泥原料而得以大宗量综合利用，以通钢铁尾矿为对象，研究了铁尾矿自身的热活化性能以及赤泥对铁尾矿热活化性能的影响。结果表明，单独对铁尾矿进行热活化不能使铁尾矿的活性得到提高；按1：1的比例将铁尾矿与赤泥共同湿磨，所得混合物料的热活化性能明显改善，以这种混合物料在600℃下煅烧2h的产物为主要原料（用量50％）制备的胶砂试块的28d抗压强度达47．5MPa，满足国家标准对42．5。水泥的强度要求。

To improve the activity of iron tailing so as to make it possible to be used in large quality as raw material for cement production, the heat-actlvation property of iron tailing itself and the effect of red mud on it are studied using the iron tailing of Tong Steel. The results indicate that heat-activation only can not improve the iron tailing activity and it can be notably improved by wet grinding with red mud in a ratio of 1 ： 1. The test piece of cementation sand made of such iron tailing-red mud mixture （50%） after calcined at 600 ℃ for 2 h can have a 28 d compressive strength of 47.5 MPa, satisfying the requirement of the state standard on 42.5° cement.