河北某锰银矿的工艺矿物学与选矿工艺研究

Study on process mineralogy and concentrating of a certain silver—manganese ore in Heibei

为了查明河北某锰银矿的工艺矿物学性质,为选矿工艺研究提供矿物学依据,对该锰银矿化学成分、矿物组成、矿石结构构造等工艺矿物学进行了研究。结果表明:该银矿原矿品位为210～220g/t,银主要以锰银矿和自然银的形式赋存,锰银矿物组成较简单,但分布不均匀。金属矿物含量仅为1%～2%,主要为:锰矿物、自然银、少量的磁铁矿和赤铁矿;非金属矿物含量为98%～99%,主要为石英和碳酸盐矿物,石英含量为60%～65%,碳酸盐矿物含量为30%～35%;其次为少量的角闪石和黝帘石。可以采用强磁-浮选工艺,可获得强磁精矿含银595.7g/t,浮选银精矿品位7328.0g/t,锰矿泥含银288.7g/t,总回收率81.44%,3种精矿合起来的平均银品位为586.8g/t。

To identify the process mineralogical properties of silver-manganese from Heibei so as to provide a mineralogical basis for its chemical composition, mineral constituent, ores texture and structure and so on. The results show that the mineral constituent of the silver-manganese ore are simple and it has asymmetric distribution, and the grade of the crude ore is 210-220g/t. The contents of metallic minerals are only 1%-2%. The main minerals are manganese ore, silver, a few magnetite and hematite. The contents of nonmetallic minerals are only 98%-99%. The main minerals are quartz and carbonate. The contents of quartz are 60%-65%. The contents of carbonate are 30%-35%. The secondary minerals are a small quantity of hornblende and zoisite. A flowsheet of high intensity magnetic separation-flotation separation was introduced to concentrate silver-manganese ore in Hebei. Silver contents in the concentrates of high intensity magnetic separation and flotation, and in the manganese sludge are 595.7g/t, 7328.0 g/t and 288.7g/t, severally, while the total silver grade and recovery can reach 586. 8g/t and 81.44%, respectively.