Experimental study on the treatment of high argillaceous pulp in dry discharge process of tailings by flocculation concentration……Guo Hongzhu,JiShaohong,Xin Wei,Gao Qingshou

Abstract：Fine-particle materials in high argillaceous tailings in dry discharge process of tailings are difficult to be dewatered.In order to determine proper precipitation parameters of the high argillaceous tailings from a gold mine,the paper selected the density of high argillaceous tailings pulp,unit flocculation consumption and flocculant types as the influencing factors to conduct flocculation precipitation test and orthogonal test on all-sliming cyanidation tailings pulp based on single variable test principle.The results show that the degree by which each factor influences the precipitation effect is as follows:flocculant types＞pulp density＞unit flocculation consumption;when the dosage of flocculant FS3802 (mass fraction 0.1 %) is 50 g/t and the density of high argillaceous tailings pulp is 4 %,the precipitation effect is the best,and on this condition,the highest underflow concentration of the dynamic precipitation test device is 46.7 %,with preliminary paste functionality.The research result can be used to guide the control of each factor affecting flocculation precipitation in dry discharge process of tailings in all-sliming cyanidation process in ore-dressing plants.

Keywords:dry discharge processof tailings; flocculation concentration; high argillaceous tailings pulp;flocculant; orthogonal experiment; precipitation effect