钛铁矿海滨砂矿尾矿的浮选试验研究

Experimental Study of Ilmenite Beach Sands Tailings Flotation

对广西北海地区的钛铁矿砂矿尾矿进行了系统浮选试验研究,钛铁矿砂矿尾矿由原矿经过重选和磁选得到.研究表明,Pb(NO_3)_2对钛铁矿有活化作用,主要是由于Pb2+与钛铁矿发生特性吸附,提高了油酸钠对钛铁矿的捕收能力.以硫酸和水玻璃作为调整剂,Pb(NO_3)_2作为活化剂,油酸钠作为捕收剂进行浮选,在硫酸用量900 g/t,水玻璃用量400 g/t,Pb(NO_3)_2用量30 g/t,油酸钠用量450 g/t的药剂制度条件下,经过一次粗选、两次精选的闭路浮选流程,可得到TiO_2品位为39.55%,回收率为54.61%的钛精矿.

A series of flotation experiments on ilmenite placer tailings in Beihai area, Guangxi Province were performed and the ilmenite placer tailings were obtained through gravity separation and magnetic separation. The experimental results showed that Pb （NO3 ）2 activates ilmenite because Pb2＋ has specific adsorption on ilmenite and thus the capacity to collect ilmenite by sodium oleate is increased. The sodium silicate and sulfuric acid were used as regulators, Pb （ NO3 ） 2 was used as activator and sodium oleate was used as collector. Under the conditions of sulfuric acid （ 900 g/t）, sodium silicate （ 400 g/t）, Pb （ NO3 ） 2 （ 30 g/t）, sodium oleate （ 450 g/t ）, the ilmenite concentrate recovery of 54. 61% and the TiO2 grade of 39.55% can be obtained by a closed flotation circuit of one rough and two concentrations.