Test of Flocculation Settlement of Whole-tailing Slurry and Selection of Deep Cone Thickener
Aiming at the ultra-fine whole-tailing of an iron mine in Liaoning Province,the static settlement test of whole-tailing slurry was carried out firstly.Then,according to the test results,the flocculant suitable for the whole-tailing slurry was selected.The orthogonal test of flocculation settlement were carried out.Based on the orthogonal test results,the optimal parameters of flocculation settlement were determined,and the verification test was carried out.Finally,the selection of deep cone thickener was studied.The results show that the static settlement of the whole-tailing slurry needs 8 h to complete,and the main settlement is basically completed within 30 min.It is recommended that the mine use an anionic flocculant with a molecular weight of 15 million.The optimal parameters for the flocculation settlement of the whole-tailing slurry recommended are:mass concentration 20％,flocculant unit consumption 40 g/t,and flocculant solution mass concentration 0.35％.The diameter of the deep cone thickener is determined to be 11.88 m,and the recommended deep cone thickener is GSNG-12 type.The settling area of the thickener is 510 m2,and the processing capacity is 800-1 200 m3/h.
万方数据
维普
