(A) Overview of drops of water copper mine located in Chaoyang of Liaoning Province Kazuo County territory.
Since the mining of ore by the county society in 1958, the mine has experienced two processes. By March 1970, the mine was self-reliant and self-reliant, and launched for the third time in 1972. Officially put into operation in the month. Now beneficiation plant actual production capacity of 85 tons / hour.
The mine is developed for the Pingyi blind well, and the mining method is the shallow hole slip method. The Pingyukou is about 70 meters away from the concentrator. The original ore transportation uses a 0.35-meter 3U-type mine car and is manually pushed to the original ore warehouse of the concentrator.
The water source is supplied by a drip-water agricultural well located about 3 km from the concentrator. The two-stage pumping station is raised to the concentrator. In addition, the mine intends to build equipment water sources at Meishutai, 5 kilometers away from the concentrator.
The mine has two power sources: one is from Lingyuan, the line is 22.5 kilometers long; the other is from Dachengzi, the line is 22.5 kilometers long. Two 320 kVA transformers are installed in the mine. The primary voltage is 10 kV and the secondary voltage is 380 volts, which are supplied to the mining and other facilities.
(II) Process 1. Raw ore properties The mine is a skarn type copper deposit. Metallic minerals are mainly chalcopyrite, pyrite times as magnetite, gangue minerals garnet, diopside, calcite, chlorite. The true proportion of ore is 2.71~2.84, and the hardness of ore is f=8~9.
2. Process Flow Broken: Two sections of open road, with a sieve on the upper part of the original mine silo, more than 150 mm ore, for manual hand crushing. The ore particle size is 150~0 mm, and the final crushed product has a particle size of 20~0 mm and a crushing ratio of 7.5.
Grinding: a closed circuit, grinding fineness - 65% of the 200 mesh point, and the overflow concentration of the classifier is 27%.
Flotation: Priority flotation, using one rough selection, two sweeping selection, one selection, the flotation machine quota is 0.082 m 3 / day? tons, the process flow and technical operating conditions are shown in the following figure.

Dehydration: sedimentation tank, concentrate water is 8% in summer and 18% in winter.
In order to reduce the particle size of the crushed product and increase the production capacity of the ball mill , the plant plans to change the crushing process to a three-stage open circuit. In addition, it is also prepared to comprehensively recover molybdenum ore with a molybdenum content of 0.02-0.03%.

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