共查询到19条相似文献,搜索用时 62 毫秒
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某含金矿石中有用矿物为自然金及银金矿,金品位为35g/t。为充分研究该矿石的工艺矿物学特性,通过化学分析、扫描电镜、X射线能谱仪、BPMA(北京矿冶研究总院开发的工艺矿物学参数自动测量系统)等分析手段,对矿石的化学成分、化学物相矿物组成、矿物嵌布特征、金的赋存状态、含金矿物的粒度、含金矿物解离度及影响金回收的矿物学因素等进行了系统研究。结果表明:矿石中金主要以自然金和银金矿形式存在,粒度以细粒金、微细粒金为主,分别占72.96%、27.04%;金矿物的嵌存状态以连生金为主,占65.11%,次为单体金,占31.06%,另有少量的包裹金和晶间金,分别占3.75%和0.08%;研究结果对矿石分选工艺流程的制定具有指导意义。 相似文献
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对新疆昆仑山某铜锌多金属矿进行了工艺矿物学研究,查明了矿石中铜、锌元素的赋存状态,矿石组成及主要有用矿物的嵌布特性,为选矿试验提供了重要依据。研究结果表明,矿石中的铜、锌主要以黄铜矿、闪锌矿的形式存在,这两种硫化矿物嵌布关系密切,且粒度偏细,将给铜、锌的分选带来不利影响。 相似文献
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《有色金属(选矿部分)》2019,(1):14-20
某含金矿石中有用矿物为自然金及银金矿,金品位为35 g/t。为充分研究该矿石的工艺矿物学特性,通过扫描电镜、X射线能谱仪、BPMA软件系统等分析手段,对矿石的元素成分、物相矿物组成、矿物嵌布特征、金的赋存状态、含金矿物的粒度、含金矿物解离度及影响金回收的矿物学因素等进行了系统研究。结果表明:矿石中金主要以自然金和银金矿形式存在,粒度以细粒金、微细粒金为主,分别占72. 96%、27. 04%;金矿物的嵌存状态以连生金为主,占65. 11%,次为单体金,占31. 06%,另有少量的包裹金和晶间金,分别占3. 75%和0. 08%;研究结果对矿石分选工艺流程的制定具有指导意义。 相似文献
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以内蒙古赤峰某铜冶炼企业的铜浮选尾渣为研究对象,利用X射线衍射分析、光学显微镜、MLA矿物自动测量系统对尾渣进行较为系统的工艺矿物学分析,系统研究了冶炼渣中主要矿物物相的嵌布特征和嵌布粒度,并分析了该铜浮选尾渣的综合回收方案。结果表明,铜浮选尾渣中铁和锌的含量分别为39.75%和2.45%,渣的主要矿相为磁铁矿、铁橄榄石及玻璃相,粒度较细,单体解离度仅为32.15%。单独磁选富集磁铁矿获得高品位铁精矿的难度较大,建议采用直接还原磁选工艺进行选铁,磁选尾矿可作为水泥的原料。 相似文献
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The discipline of process mineralogy developed through the recognition that metallurgical flowsheets could be optimised by thorough characterisation of the precursor ore mineralogy, mineral associations, grain size and textures. In a procedure analogous to process mineralogy it is shown here that effective characterisation of mine wastes for Acid Rock Drainage and Metal(loid) Leaching (ARDML) potential must follow a similar set of robust practices which include: (i) representative sampling; (ii) static/screening level geochemical tests and qualitative mineralogical assessment; (iii) longer-term kinetic geochemical tests and quantitative mineralogical assessment; and (iv) quantitative numerical modelling to assess source term chemistry associated with the mine facilities and thereby determine potential impacts to receptors. This process is dependent on a sufficiently robust drill core database and a detailed mine plan through which an assessment of mine wastes is possible. Such detailed characterisation may be limited by insufficient budgets, however omission of a thorough mineralogical investigation may lead to a lack of understanding of the primary geochemical controls on mine waste behaviour. In turn, this can lead to over- or under-engineering of mine facilities, which can have financial and/or environmental implications. Several case studies are presented to illustrate how mineralogy can be applied to solve problems in ARDML prediction and mitigation, specifically within waste rock assessment. 相似文献
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Applied mineralogy has been developed with the ore from Cajati mine, providing a support to the processing through the characterization of the run of mine and products from the beneficiation plant. The mine, located in southeast Brazil, is an important national phosphate rock producer that exploits a low graded carbonatitic ore (5% P2O5). The ore essentially contains carbonates, calcite and dolomite, with variable amounts of magnetite and accessory minerals (phlogopite, olivine, pyroxene, amphiboles, serpentine, sulfides and others). The ore composition varies along the orebody, and for concentration by flotation a knowledge of these variations as a tool to the mine operation and the industrial plant optimization is necessary. A procedure using mainly standard laboratory tests supported by chemical and mineralogical analysis was developed, in order to obtain parameters of milling behavior, mineralogical composition, liberation degree and flotation expected response. This procedure is being applied to different volumetric samples from mine bench faces, to attempt mining operations, as well as to drill core samples to achieve a technological orebody model in order to optimize the mine planning. 相似文献
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为充分了解某地金矿矿石性质,制定合理的选别工艺流程,通过化学分析、扫描电镜以及工艺矿物学自动定量分析系统(MLA)等测试方法对金矿矿石进行了系统的工艺矿物学研究,包括矿石矿物组成及相对含量、矿石矿物的结构构造、金矿物的形态和粒度分布特征、主要金属矿物和脉石矿物的产出特征等,并且对原矿进行了浮选试验和重浮联合工艺试验。 结果表明,该金矿中主要可回收的有价金属为金,其含量为3.74g/t。 该金矿的原矿矿物主要由黄铁矿、石英、白云母和碳酸盐矿物组成,此外还有少量的方铅矿、黄铜矿、绿泥石和黑云母, 还含有微量磁铁矿和锐钛矿等。 原矿中自然金多以单独的自然金颗粒形式存在,金主要嵌布在黄铁矿中,而黄铁矿多以自形-半自形粒状及粒状集合体产出,呈浸染和团块状分布在脉石中。采用“重选+浮选”联合工艺流程,可获得指标良好的重选精矿和浮选精矿,重选精矿中Au的品位和回收率分别为54.75g/t、78.10%;浮选精矿中Au的品位和回收率分别为6.45g/t、19.78%,金矿总回收率为97.88%。该研究为该地区矿产综合利用提供了技术借鉴。 相似文献
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为合理开发利用某铜矿资源,对其进行了工艺矿物学研究。结果表明,该铜矿石属高氧化率和高结合率的氧化铜矿石,是典型的难选氧化铜矿石。矿石中可回收的主要矿物为假孔雀石、绿磷铜铁矿、黄铜矿、褐铁矿、磁铁矿和赤铁矿,伴生金、银可综合回收。脉石矿物有磷灰石、石英、长石,云母、绿泥石、绿帘石等。矿石结构主要为半自形晶粒结构、它形晶粒结构、交代结构、隐晶质结构和柱状结构。矿石构造主要为浸染状构造、块状构造、星点状构造、条带状构造、细脉浸染状构造。 相似文献
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摘要:通过利用化学分析,x射线衍射和光学显微镜等方法,系统研究了云南省某金矿的矿物学特征。结果表明,该矿石的金品位为3.55 g/t,伴生元素银为2.96 g/t,可综合回收。黄金矿产以天然金和银金为主,其细粒度分布特性复杂。金的主要载体矿物黄铁矿等硫化物矿物,粒度也都很细,还有一些自然金以细小颗粒和微颗粒嵌入脉石矿物。进行了浮选磨矿细度探索性试验,确定该矿样合适的磨矿细度为-0.045mm70%。试验研究成果为制定合理的选矿工艺提供了依据。 相似文献