全尾砂浓密沉降规律试验研究

Test Study on the Law of Dense Settlement of Full Tailings

针对某金属矿全尾砂颗粒细小、尾砂沉降浓缩难度较大等问题,以固体通量和底流浓度作为衡量指标,通过开展全尾砂物理性质试验、静态浓密试验和动态浓密试验来研究全尾砂的絮凝沉降规律,从而确定适合矿山浓密机给料浓度、絮凝剂种类和添加量.试验结果表明,全尾砂浓密合适的给料速度为0.53~0.83 t/(m2·h),选用LB1530阴离子絮凝剂,絮凝剂添加量为15 g/t,最佳矿浆稀释浓度为11%左右.同时,也表明该全尾砂可采用深锥浓密机脱水,能够实现膏体排放,从而达到安全、高效、经济的矿山开采条件.

Aiming at the problems of fine particles and difficult settlement concentration of full tailings in a metal mine,taking the solid flux and underflow concentration as measurement indexes,the flocculation and settlement law of full tailings is studied by carrying out the physical properties of full tailings,static concentration test and dynamic concentration test,so as to determine the suitable feed concentration of the mine thickener,the flocculant type and dosage.The test results show that the suitable feeding speed of the full tailings thickening is 0.53~0.83 t/(m 2·h),the LB1530 anionic flocculant is selected,the dosage of flocculant is 15 g/t,and the dilution concentration of pulp is about 11%.Meanwhile,it also shows that dehydration of full tailings can be realized by using deep cone thickener,which can realize the paste discharge,so as to achieve the goal of the safe,efficient and economic mining.