论文部分内容阅读
利用加热与超细粉碎方法对天然黄铁矿进行改性 ,探讨其去除 Cr( )的效果。将黄铁矿加热到 4 50℃时 ,试样除 Cr( )的效率大幅度增高 ,适宜的 p H范围从小于 2 .5增加到 3.0 6～1 1 .2 0 ,且加热改性的试样用量不到天然试样用量的 1 0 %。2 0 0目至 4 0 0目的天然黄铁矿去除 Cr( )的效率远较 2 0 0目以上的天然黄铁矿去除 Cr( )的效率高。试样久置不影响对 Cr( )的去除效果 ,去除率可达 99.2 %以上 ,反应后的 p H值都接近 4 .0 ,与磁黄铁矿处理 Cr( )废水过程中 p H值的变化规律一致。不同产地的黄铁矿样品除 Cr( )的效果稍有差异。
The use of heating and ultrafine grinding method to modify the natural pyrite, to explore its removal of Cr () effect. When the pyrite was heated to 450 ℃, the efficiency of Cr (Cr) addition in the sample increased greatly, the suitable range of p H increased from less than 2.5 to 3.06 ~ 1.120, and the heat-modified test Sample dosage less than 10% of the natural sample. 2 0 0 to 4 0 0 Purification of Natural Pyrite Removal of Cr () is far more efficient than removal of Cr () from natural pyrite above 200 mesh. For a long time, the sample did not affect the removal efficiency of Cr (), the removal rate could reach more than 99.2%, the p H value of the reaction was close to 4.0, and p H value The same rules of change. The results of the pyrite samples from different areas except Cr () are slightly different.