摘要
对用高碱性介质法得到的赤泥浆液进行絮凝沉降试验 ,结果表明 ,淀粉和 A1 0 0 0絮凝剂均可加速赤泥浆液的沉降速度 ,A1 0 0 0的絮凝效果更好。当溶出时 Ca O的添加量为矿石质量的 8% ,浆料稀释至总 Na2 O质量浓度为 3 5 0 g/L,加入的 A1 0 0 0絮凝剂的质量为干赤泥质量的 8%时 ,分离效果较好。赤泥浆料中碱浓度提高 ,赤泥沉降速度减小 ;Ca O添加量增大、矿粉的粒度增大 ,赤泥沉降速度增大。p H小于 1 4时 ,赤泥胶粒表面带负电 ;p H升高 ,赤泥颗粒迅速失去电荷。
It can be concluded from flocculation settlement experiments that starch or A1000 can accelerate the settling process of red mud slurry,but A1000 is more effective.Settling velocity of red mud slurry slows down with increasing Na 2O concentration in red mud slurry,or decreasing the addition amount of CaO or particle size of bauxite.ζ potential of red mud particle measured by ζ potential instrument shows that the surface of red mud colloid has negative charges when pH is less than 14,and surface charges decrease when pH increases.The addition of flocculant can accelerate settling velocity because of adsorption and bridging effects.
出处
《湿法冶金》
CAS
2002年第1期18-21,共4页
Hydrometallurgy of China
