摘要
为了回收陕西某难选原生钒钛磁铁矿石中的钛铁矿资源,在对矿石进行工艺矿物学研究基础上,对干式中磁抛废后的矿石进行了强磁预选—反浮选脱硫—浮选选钛工艺试验。结果表明:1该矿石属含硫高磷低品位钒钛磁铁矿石,钛主要以钛铁矿形式存在,占总钛的67.66%,主要呈浸染状产出,常发生榍石化,沿钛磁铁矿边缘或粒间嵌布,少数零星出现在脉石中;硫主要以黄铁矿形式存在;脉石矿物主要为透辉石、绿泥石、角闪石、斜长石等硅酸盐矿物。2矿石经粗粒中磁干式抛废—弱磁选铁—强磁预选富集钛—反浮选脱硫—浮选提纯钛铁矿的工艺流程处理,实现了对难选钛铁矿的高效回收,最终获得铁品位为55.12%、含钛10.17%、铁回收率为44.20%的铁精矿,以及Ti O2品位为48.01%、回收率为51.84%的钛精矿。实现了钛铁矿与比磁化系数接近的铁硅酸盐矿物等的有效分离。
To retrieve ilmenite from a refractory vanadium titanium magnetite ore in Shaanxi Province, a combined process including high intensity magnetic pre-concentration, desulfurization via reverse floatation,titanium floatation for the dry rough concentrate based on process mineralogy tests was conducted. The results showed that： ①The ores is one kind of low- grade vanadium titanium magnetite ore with sulphur and high phosphorus. Titanium mainly exists in the form of ilmenite which contributes to 67.66% of the total titanium composition. The titanium is mainly disseminated in the ores and is embedded a- long the edges of the ore or intergranular with the ores, and a small proportion is in the form of gangues. Sulfur mainly exists in the form of pyrite and the gangues contain silicate such as diopside, chlorite, amphibole and plagioclase. ②By the combined process including dry rough magnetic separation for tailing removal, low intensity magnetic separation, iron selection, titanium pre-enrichment by high intensity magnetic separation, desulfurization via reverse floatation and purification of ilmenite by floata- tion, the efficient recycling of titanium from the ores was achieved. In final, iron concentrate with Fe grade of 55.12%, titanium grade of 10.17% and Fe recycling rate of 44.20% ,and titanium concentrate with TiO2 grade of 48.01% and the recovery rate of 51.84% were achieved. The proposed process could realize efficient separation between ilmenite and iron silicate with simi- lar magnetization coefficient.
出处
《金属矿山》
CAS
北大核心
2017年第1期67-72,共6页
Metal Mine
关键词
钒钛磁铁矿
钛铁矿
强磁选预富集钛
反浮选脱硫
浮选选钛
联合工艺
Vanadium titanium magnetite ore, Ilmenite, Titanium pre-enrichment by high intensity magnetic separation,Desulfurization via reverse floatation,Titanium floatation,Combined process
