山西马家沟冶镁白云石大理岩矿床地质特征及矿石加工利用性能研究

Study on geological characteristics and ore processing and utilization performance of dolomite marble deposit for magnesium smelting in Majiagou, Shanxi

冶镁白云石大理岩矿为近年来马家沟矿区内发现的新型矿种,其潜在的开发利用价值是目前本区地质工作研究的重点。本文通过详细的野外地质调查和区域地质资料研究,论述了冶镁白云石大理岩矿床地质特征;并对矿石进行加工选冶试验研究,以评价矿石工业利用性能。综合研究表明:矿体呈层状产于中下元古界中条群余家山组二段地层中,主矿体厚度较大,且连续稳定,矿石分布较集中,品位变化较均匀,有害元素含量低,对矿床开发十分有利;MgO、CaO含量适中,热强度差,煅烧白云石在较宽的温度时间范围内,具有较稳定的水化活性,还原镁收率良好,矿石性能满足皮江法炼镁要求。

Dolomite marble deposit for magnesium smelting is a new type of mineral discovered in Majiagou mining area in recent years, and its potential development and utilization value is a key point in the study of geological work in this area.Through the detailed field geological survey and research on regional geological data, the geological characteristics of the dolomite marble for magnesium smelting are expounded;The ore dressing and smelting experiments are carried out in order to evaluate the utilization performance of the mineral industry.Comprehensive research shows that the ore body is layered in the second member of Yujiashan Formation, of the Zhongtiao Group in the Middle-Lower Proterozoic.The main ore body is thick and stable.The ore distribution is concentrated, and the grade is uniform, and the content of harmful elements is low,which is very beneficial to the deposit exploitation. The content of MgO and CaO is moderate, and the thermal strength is poor The calcined dolomite has relatively stable hydration activity in a wide temperature range,and it has a good yield of reduction magnesium.Therefore the ore properties meet the requirements of Pidgeon magnesium smelting.