The plant in 1959 and designed by Changsha Nonferrous Metallurgy Design and Research Institute, commissioned in 1961, the design capacity of 1200 t / d, 1981 it was expanded to 1800 t / d.
(1) The nature of the ore: Ores processing plant belonging SULPHIDE DEPOSITS mesothermal fracture filling accountable. Silver mountain (including Nanshan gentle ore body), Kowloon heaven, Kitayama three mining components. The main ore body to the surrounding rock sericite phyllite, followed by pyroclastic rocks. The main lead ore well-metallic minerals, sphalerite, yellow copper ore, pyrite, silver and other silver-containing natural minerals, followed tetrahedrite, magnetite, siderite and the like, in addition there indium, cobalt, Associated elements such as tin . The gangue minerals are quartz , sericite, calcite , dolomite, chlorite, kaolin , feldspar, etc. The distribution of minerals and the changes of ore-bearing vary with the mining area. The Yinshan mining area is dominated by galena, followed by sphalerite and pyrite. The Shangtian and Beishan mining areas in Kowloon are dominated by sphalerite, followed by pyrite and galena. The grade of silver in the ore is closely related to lead and copper, that is, the amount of silver in the mine with high lead and copper is also increased.
Galena is the most important mineral in the ore. It is composed of sphalerite and pyrite. It is composed of dense block, reticular, fine vein-disseminated ore. The galena and the sphalerite are closely symbiotic, and the minerals such as pyrite, sphalerite and arsenopyrite are dissolved to form a residual structure. Galena assembly often wrapped with a round particulate, emulsion droplets tetrahedrite shape, granular bulk, emulsion droplets magenta silver shaped, plate-like, columnar antimonial copper silver, fine bournonite rounded shape, Huiyin mine, pyrite, etc.
The ore density is 2.8~3.13t/m 3 , the loose density is 1.8~1.98t/m 3 , the Mohs hardness is 7~8, and the angle of repose is 45°. The multi-element analysis of lead ore, lead phase analysis and zinc phase analysis are shown in the table below. :
(2) Process flow: The original design is a three-stage open circuit crushing process. In order to meet the needs of mine production and development, it was expanded in 1982. A new three-stage, closed-circuit, 2500t/d new crushing plant has been built. The crushing and screening process is shown in the following figure:
Flyknit Shoes,Flyknit Shoes Mens,Flyknit Shoes Womens,Flyknit Running Shoes
Shangqiu JIAYING SHOES CO.,LTD. , https://www.jiayingshoes.com