新疆卡拉麦里成矿带某金矿矿石特征及提取研究

Characteristics of one gold ore from Karamori metallogenic belt in Xinjiang and study on its extraction

通过矿石薄片鉴定表明,该金矿矿石结构为自形—半自形—他形为主;矿石中主要硫化物矿物为黄铁矿,氧化物以褐铁矿、磁铁矿为主。通过电子探针研究发现：矿石中金主要为晶隙金和裂隙金,且形态复杂多样,部分金矿物以难溶硅酸盐包裹金和硫化物包裹金形式存在;金矿物主要为显微金（0.2~20μm）和次显微金（〈0.2μm）。通过对矿石的提金试验研究表明：原矿浮选和氰化工艺均可取得较好的技术指标,但氰化指标较好;浮选金精矿品位83.37 g/t、回收率86.49%、产率5.98%;原矿氰化金浸出率可达96.38%。

The ore sheet identification shows that the main structure of the gold ore is euhedral - hypidiomorphic - xenomorphic ; the main sulfide mineral in the ore is pyrite and limonite and magnetite are the big part of the oxide. Electronic probes find that gold are mainly in the forms of intercrystalline gold and fissure gold with complex and var- ied forms in the ore while some indissolvable gold takes the form of gold inclusion in silicate and sulfide ; Gold miner- als in the ore are mainly micro gold （0.2 mm to 20 μm） and submicro gold （ 〈 0.2 μm）. Experimental study on gold extraction shows that raw ore flotation and cyanidation both achieve satisfactory results but cyanidation is better; the grade of gold flotation concentrates is 83.37 g/t,the recovery＇rate is 86.49 % and the production rate 5.98 % ; the cyanide leaching rate of raw orecould reach 96.38 %.