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凤凰山渣浆泵银矿 的矿石特点和浮选工艺流程是什么?

作者:admin 发布日期:2021-02-06 11:04:25 关注次数:92

凤凰山渣浆泵银矿 的矿石特点和浮选工艺流程是什么?
    凤凰山银矿成立于1996年,位于广西壮族自治区隆安县,是广西最大的独立银矿床,其氧化矿和原生矿矿石量433万吨,银金属量1333吨,为大型独立银矿床。该矿原设计规模为300t/d.选矿厂于1999年开工建设,2001月竣工投产,2002~2009 年逐步对选矿车间进行了技改和扩建,使选矿的生产能力达到550t/d以上。
(1)原矿性质
    矿山的原矿分三部分:种是全氧化矿,在矿区的最上部,占矿区矿量的20%左右,用浮选法是不能处理的;一种是原生硫化矿里掺一小部分氧化矿,这部分矿在矿区的中上部;种是原生硫化矿,在矿区的中下部。选矿厂主要是通过浮选法来处理后两种原矿。
    原生硫化矿,有害杂质含量高,金属矿物主要为硫锰矿、菱锰矿、毒砂和黄铁矿,其次为闪锌矿、方矿、黄铜矿 和少量或微量的黝锡矿。非金属矿物有石英、方解石和绢云母,并有微量的白云母。

该矿主要回收银矿物。工艺矿物学研究表明,银矿物种类较多,嵌存状态较复杂,嵌布粒度较细,银矿物嵌存在硫锰矿中。除独立的银矿物外,还有2.94%的银以类质同象形式赋存在黄铜矿、黄铁矿、毒砂和方矿之中。硫锰矿中包裹银相对减少,而粒间银相对增多;闪锌矿中包裹银增加。在矿石中还可见到自然银和金银矿包裹在脉石矿物和黄铁矿中。银大多呈次微细粒嵌布于黄铁矿、毒砂、碳质中,属难处理矿石。原矿化学分析结果见表4. 4

硫锰矿以粗粒浸染为主,较均匀嵌布;闪锌矿的浸染粒度是以粗粒为主,不均匀嵌布;而方铅矿则以粗粒和细粒为主,不均匀嵌布。详细见表4.5

其他金属矿物如毒砂的浸染粒度最大达0.1mm左右,最小在O. 04mm左右,一般分布比较均匀,黄铁矿的浸染粒度最大可达0.15mm,最小达0.03mm般粒度分布不甚均匀。
    此外渣浆泵矿石中方解石和绢云母的含量达到40%以上,故该矿较易于泥化。当磨矿细度为- 0. 074mm达到65%时,一10μm 组分的含量达到30%左右,且银含量高于原矿的品位。这部分矿泥会

使银的回收受到影响,而且会破坏正常的浮选环境。

(2)选矿工艺流程

工艺流程见图4.8

矿石经过二段一闭路的破碎(筛分增加洗矿作业)后进入一段闭路磨矿,磨矿细度为-0.074mm65%、浓度为28%~30%

What are the ore characteristics and flotation process of Fenghuangshan slurry pump silver mine?

Fenghuangshan silver mine, founded in 1996, is located in Long'an County, Guangxi Zhuang Autonomous Region. It is the largest independent silver deposit in Guangxi. Its oxidized ore and primary ore amount is 4.33 million tons, and silver metal amount is 1.333 tons. It is a large independent silver deposit. The original design scale of the mine is 300t / D. the concentrator started construction in 1999, completed and put into operation in January 2001. From 2002 to 2009, the technical transformation and expansion of the concentrator workshop were gradually carried out, so that the production capacity of the concentrator reached more than 550t / d.

(1) Properties of raw ore

The raw ore of the mine is divided into three parts: one is total oxide ore, which accounts for about 20% of the total ore in the mining area, and can not be treated by flotation method; the other is primary sulfide ore mixed with a small part of oxide ore, which is in the middle and upper part of the mining area; the other is primary sulfide ore, which is in the middle and lower part of the mining area. The concentrator mainly deals with the latter two kinds of raw ore by flotation.

The main metal minerals are pyrolusite, rhodochrosite, arsenopyrite and pyrite, followed by sphalerite, galena, chalcopyrite and a small amount or trace of tetrahedrite. The nonmetallic minerals include quartz, calcite, sericite and trace muscovite.

The ore mainly recovers silver minerals. The study of process mineralogy shows that there are many kinds of silver minerals, the embedded state is complex, the embedded particle size is fine, and the silver minerals are embedded in the sulfur manganese ore. In addition to independent silver minerals, 2.94% of silver occurs in chalcopyrite, pyrite, arsenopyrite and galena in the form of isomorphism. The wrapped silver in sphalerite is increased, while that in pyrolusite is decreased. In addition, natural silver and gold silver ores can be found in gangue minerals and pyrite. Most of the silver is submicron and disseminated in pyrite, arsenopyrite and carbonaceous, so it is a refractory ore. The chemical analysis results of raw ore are shown in table 4.4.

The results show that the main impregnation particle size of sphalerite is coarse and unevenly distributed, while that of galena is coarse and fine and unevenly distributed. See table 4.5 for details.

Other metal minerals such as arsenopyrite have a maximum size of about 0.1 mm and a minimum size of about 0.04 mm, which are generally evenly distributed. Pyrite has a maximum size of 0.15 mm and a minimum size of 0.03 mm, which are generally not evenly distributed.

In addition, the content of calcite and sericite is more than 40%, so the ore is easy to be slimed. When the grinding fineness of - 0.074mm reaches 65%, the content of - 10 μ M component is about 30%, and the silver content is higher than the grade of raw ore. This part of the slime will

The recovery of silver will be affected and the normal flotation environment will be destroyed.

(2) Beneficiation process

The process flow is shown in Figure 4.8

The ore is crushed by two-stage and one-stage closed-circuit grinding (screening and ore washing operation is added) before entering the first stage closed-circuit grinding. The grinding fineness is -0.074mm, accounting for 65%, and the concentration is 28% ~ 30%






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