灵宝某金矿石工艺矿物学研究

发布时间：2018-07-17 00:07

【摘要】：灵宝某金矿石属于石英脉型金矿石,金品位为1.94 g/t。为了给该矿石的选矿工艺研究提供依据,对矿石进行了工艺矿物学研究。结果表明:(1)矿石中有回收价值的元素为金,主要以自然金和碲金矿的形式存在,与金矿物关系密切的矿物主要有黄铁矿,其次是磁铁矿、方铅矿、黄铜矿等。(2)矿石中的自然金多以粒状、不规则粒状、麦粒状、棱角粒状被黄铁矿包裹,其次呈叶片状、不规则粒状以裂隙金形式产出,少量以粒间金的形式产出;碲金矿多以粒状、圆粒状、不规则粒状被硫化物包裹,其次呈不规则粒状以裂隙或粒间的形式产出。(3)矿石中71.10%的金被黄铁矿包裹,裂隙金、粒间金占总金的24.22%,仅有4.68%的金被其他脉石矿物包裹。(4)矿石中主要载金矿物黄铁矿主要呈自形—半自形粒状或他形粒状,可见方铅矿、黄铜矿沿黄铁矿粒间或裂隙充填产出及粗粒黄铁矿包裹细粒黄铜矿和脉石颗粒现象等。黄铁矿以中、粗粒为主,粒径多在0.5~2 mm,少量黄铁矿呈细粒嵌布,粒径在0.15~0.6 mm。(5)矿石在磨矿细度为-0.074 mm占60%的情况下,97.03%的黄铁矿得以解离,黄铁矿主要分布在0.10~0.037 mm粒级,+0.10、0.037~0.01 mm粒级次之。因此,采用浮选工艺富集黄铁矿并强化对裂隙金、粒间金的回收就可实现该矿石中金的充分回收。
[Abstract]:Lingbao gold ore belongs to quartz vein type gold ore with gold grade of 1.94 g / t. In order to provide the basis for the study of the ore processing technology, ore process mineralogy was studied. The results are as follows: (1) Gold is the element with recovery value in ore, mainly in the form of natural gold and tellurium gold, pyrite is the mineral closely related to gold ore, followed by magnetite and galena. Chalcopyrite and so on. (2) the natural gold in the ore is mostly granular, irregular granular, wheat granular, angular granular wrapped by pyrite, followed by blade shaped, irregular granular in the form of fissured gold, and a small amount in the form of intergranular gold; Tellurium gold deposits are mostly granular, round and irregular particles covered by sulphide, followed by irregular particles in the form of fissures or intergranular forms. (3) 71.10% of gold in ore is covered by pyrite, fissured gold. Intergranular gold accounts for 24.22% of the total gold, and only 4.68% of the gold is covered by other gangue minerals. (4) Pyrite, the main gold bearing mineral in the ore, is mainly self-shaped, semi-self-granular or heteromorphic, and galena can be seen. Chalcopyrite is filled along pyrite grain intergranular or fissure, and coarse pyrite encapsulates fine chalcopyrite and gangue particles. Pyrite is mainly medium and coarse, with a particle size of 0.5 ~ 2 mm, and a small amount of pyrite is embedded in fine particles with a particle size of 0.15 ~ 0.6 mm. (5) when the grinding fineness is -0.074 mm or 60%, the pyrite can be dissociated from 97.03% of the pyrite. Pyrite is mainly distributed in 0.10m 0.037mm grain grade, 0.10m 0.037mm grain order is the second. Therefore, the full recovery of gold from the ore can be realized by using flotation process to enrich pyrite and strengthen the recovery of fissured gold and intergranular gold.
【作者单位】：中国地质科学院郑州矿产综合利用研究所;国家非金属矿资源综合利用工程技术研究中心;国土资源部多金属矿评价与综合利用重点实验室;
【基金】：国土资源公益性行业科研专项经费项目(编号:201311023) 中国地质调查局地质调查项目(编号:DD20160339)
【分类号】：TD91;TD953

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