青海洪水河铁矿床矿石特征及加工技术性能

The ore complex characteristics and processing performance of Hongshuihe iron deposit, Qinghai province

洪水河铁矿是位于青海省东昆仑东段布尔汉布达山北坡的一中型矿床,赋存于中元古界狼牙山组的一套浅变质的钙质绿泥千枚岩加碳酸岩组合中。矿床成因属沉积变质型铁矿床。矿石自然类型主要有磁铁矿、含赤铁矿磁铁矿和赤铁矿等。矿石矿物主要为磁铁矿、赤铁矿、褐铁矿、镜铁矿等,脉石矿物主要是石英,其次是绿泥石、铁白云石和方解石等。矿石中可供选矿回收的主要组分是铁,造渣组分主要是SiO2,其次为Al2O3、CaO和MgO,有害杂质磷的含量偏高。矿石属低硫含磷的单一酸性混合型铁矿石。矿石中磁铁矿为不均匀细粒嵌布,加工技术性能方面需要选择-400目95%以上的磨矿细度能得到62%以上品位的铁精矿,能否取得经济效益,需进行技术经济指标计算后确定。

Hongshuihe iron deposit, a metamorphic sedimentary deposit, is located in the northern slope of Mountain Buerhan- buda of the eastern section of the East Kunlun in Qinghai Province, and occurs in a set of epimetamorphic calcareous chlorite phyllite with interlayed carbonate rocks of Mesoproterozoic Langyashan Group. The natural types of ore are mainly magnetite, magnetite with hematite, hematite, etc. and the industrial type is the iron ore required to select. Ore minerals are mainly magnetite, hematite, limo- nite, specularite and so on, and gangue minerals are mainly quartz, as well as chlorite, ankerite and calcite, etc. The major compo- nent for the recovery of the ore with a little high harmful phosphorus is iron, the slagging component is SiO2 , as well as A1203 , CaO and MgO. The ore type is a single mixed acidic hybrid iron ore, having the low sulfur and containing phosphorus. Non -uniform fine - grained magnetite is embedded in ores, so it is difficult to obtain high - grade iron concentrate and should be ground more than 95% at -400 meshes to get more than 62% iron concentrate. That means, the technical and economic indicators are needed to calculate to whether it is beneficial or not to develop it.