【摘要】：鐵礦選礦廠使用脂肪酸類陰離子捕收劑反浮選鐵礦物,存在捕收劑用量大、所需浮選溫度高、浮選指標差等問題。東北大學研發(fā)了一種新型酰胺基羧酸捕收劑DWD-3,并應用于司家營混磁精反浮選脫硅。實驗室試驗結果表明,在浮選溫度為25℃,粗選礦漿pH=11.5、DWD-3用量為400 g/t、CaCl_2用量為400 g/t、玉米淀粉用量為1 000 g/t時,經(jīng)1粗1精3掃閉路反浮選,能獲得精礦鐵品位66.48%、回收率80.32%,尾礦鐵品位16.35%的指標。以捕收劑DWD-3代替現(xiàn)場捕收劑GK-68可使浮選溫度由40℃降至25℃,并且精礦鐵品位提高了0.39個百分點、回收率提高了2.23個百分點,尾礦鐵品位降低了1.57個百分點。對浮選產(chǎn)品分析表明,精礦中存在20μm以下的緊密連生體;尾礦中有大量較大顆粒連生體,且連生體中鐵礦物與脈石部分相互浸染連生,是尾礦鐵品位較高的原因。
[Abstract]:Iron ore concentrator uses fatty acid anion collector to reverse flotation iron minerals, which has many problems, such as large amount of collector, high flotation temperature, poor flotation index and so on. A new Amido-carboxylic acid collector DWD-3, was developed and applied to the desilication of Sijiaying mixed magnetic fine flotation. The results of laboratory test show that when the flotation temperature is 25 鈩，

本文編號：2446042