高效浓密机尺寸估算法在铜矿尾砂浓缩中的应用

为能够在墨西哥某铜矿初步设计阶段为预估高效浓密机浓密面积提供依据,以FY3-10尾矿作为浓密试验机的给矿进料,通过标准的试验室絮凝沉降试验,开展尾砂絮凝沉降规律研究,确定不同给入尾矿浆浓度、不同絮凝剂用量条件下的尾矿沉降速度及底流浓度,从而优选出最优絮凝剂添加量。根据入料浓度28%、絮凝剂添加量20 g/t时的沉降曲线,建立沉降数学模型,利用Kynch理论,结合C-C法及T-F法,通过数值公式推导及图解法,预估了该矿山所需的高效浓密机浓密面积为5 014 m2,最终确定需要4台直径约40 m的高效浓密机对尾砂浆进行浓密。

Study on the estimation mehtod of thickener area based on static flocculation settling test

In order to provide basis for estimating thickening area of high-efficiency thickeners in the preliminary design phase of a copper mine in Mexico, this article took FY3-10 tailings as feed of thickening testing machine, researched flocculent settling law of tailings through a standard laboratory-scale flocculent settling test, and determined settling velocity of tailings and underflow concentration under the conditions of different concentrations of tailing slurry fed and different dosages of flocculants, thus selecting the optimum dosage of flocculants. A mathematical model of settlement was established according to the settlement curve with feed concentration: 28% and dosage of flocculants: 20g/t. By the use of Kynch theory, in combination with C-C method and T-F method, and through numerical formula derivation and graphic method, thickening area of high-efficiency thickeners required for the mine was estimated to be 5,014m2, and it was finally determined that 4 sets of high-efficiency thickeners with diameter of about 40m would be required for thickening of the tailing slurry.