(A) Overview of green copper mine located in Changle County mountain province Changwei region.
The mine was built in the Great Leap Forward in 1958. Due to the interference and destruction of Liu Shaoqi's counter-revolutionary revisionist Lu Hong, it was cut off. Under the guidance of Mao's revolutionary route, the Qingshang Copper Mine was built 200 tons/day in 1971. Selection and selection of enterprises.
The mine is developed for the inclined shaft, and the mining method is shallow hole mining method. Wellhead close to the beneficiation plant, ore from the ore Lifting directly to the warehouse.
The water was taken from the Xihe River, 1.3 km from the concentrator, and the concentrator built a 50 m3 water tower.
The mine power supply comes from Weifang Power Plant, and is introduced into the mine's total step-down substation through a 31-kilometer 35-kilovolt line (transformer capacity is 1800 kVA), and it is also converted to a transformer substation (transformer capacity of 560 kVA). The volts dropped to 380 volts and distributed to the concentrator.
The dressing factory maintenance system is a minor repair every month, a mid-term repair, and a year-end overhaul. Spare parts are mainly from Zibo Mining Machinery Factory and Commune Machine Repair Factory.
(II) Process 1. Raw ore properties
The mine is a copper-bearing skarn type deposit. The type of ore is a hydrothermal metasomatic type secondary copper sulfide ore. Metallic minerals bornite, followed by the chalcocite, chalcopyrite, pyrite. Gangue minerals potassium feldspar, quartz, hornblende. The ore is simple in nature and has a low oxidation rate. Therefore, in the case of a low grade of ore, a simple sorting process can still obtain better sorting indicators.
2. Process Flow Breaking: Three sections of closed circuit, the original ore size is 350~0 mm, the final crushed product has a particle size of 18~0 mm, and the crushing ratio is 19.
Grinding: a closed-circuit grinding, grinding fineness - 200 mesh accounted for 60%, overflow concentration 30%.
Flotation: use one rough selection, one selection, and the second sweeping process to select copper. The process flow is shown in the figure below.
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Dehydration: Two sections of dewatering are carried out by concentration and filtration, and the concentrate water is 12%.
(III) Main equipment of the concentrator (below)
1. Compact structure: The pump body and impeller are designed in one piece, which makes the pump more compact, occupies a small area and is easy to install and maintain.
2. Corrosion resistance: The pump body and impeller are made of high-strength cast iron with special treatment on the surface, which has excellent corrosion resistance.
3. High efficiency and energy saving: The impeller is made of high quality wear-resistant material, which has the feature of high efficiency and energy saving and can greatly reduce energy consumption.
4. Safe and reliable: There are multiple protection measures during the operation of the pump, such as overload protection, overheating protection, etc., which ensure the safe and reliable operation of the pump.
5. Wide application: cast iron pumps are suitable for various industrial fields, such as petroleum, chemical, pharmaceutical, food, textile, etc., and can convey various liquid media.
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