全尾砂充填料浆电渗脱水固结试验研究

Experimental study of dehydration-consolidation of full tailings filling slurry using electro-osmosis method

为了探究充填料浆电渗脱水固结相关规律,采用自制的电渗脱水试验和自然脱水试验装置,进行全尾砂胶结充填料浆和非胶结充填料浆的脱水试验。通过监测试验过程中充填料浆的沉降高度、温度、脱水量、电流、阴阳极含水率、电能消耗和检测充填体试块强度,对比分析全尾砂充填料浆在不同条件下的脱水固结性状。研究结果表明:(1)未添加胶凝材料的全尾砂非胶结充填料浆,电渗脱水效果明显;(2)充填料浆电渗脱水效果主要与充填料浆自身的物理化学性质有关;(3)电渗过程中能耗系数逐渐增大,通电会造成充填体温度和电阻率升高,阳极腐蚀严重;(4)纵向布置电极时,上部溢流水的存在将导致充填料浆发生剧烈的电解现象。

To explore the law of dehydration-consolidation of full tailings filling slurry in the case of Electro-osmosis,the dehydration test of the full tailings with cemented and non-cemented filling slurries were conducted on the self-made electro-osmotic dehydration and natural dehydration test device.After monitoring series factors,like the height of filling slurry,temperature,drainage,electric current,anode and cathode moisture content,power consumption and testing blocks strength of the backfills,the characteristics of dehydrationconsolidation in full tailings filling slurry under different conditions were compared.The following conclusions are drawn:(1)The effect of electro-osmotic dehydration is obvious under the situation of full tailings non-cemented filling slurry;(2)The effect of electro-osmotic dehydration in the filling slurry is mainly related to the physicochemical properties of the filling slurry itself;(3)The energy consumption coefficient in the process of electro-osmosis is gradually increasing.The power supply can increase the temperature and resistivity of the backfills,with the anode seriously corroded;(4)When arranging the electrodes longitudinally,it can?t be energized when the overflow water has not been drained,otherwise violent electrolysis phenomenon will be observed.