River diversion method: building a large dam in an area, drain the river water, collect the river gravel layer. The excavation dredge method is not only used in river mines, but also suit for mining of marine diamond mines.

Mining of wet alluvial diamond deposits generally uses two methods of excavation dredge and river diversion.Įxcavation method: The suction dredger is equipped with heavy-duty suction pump, which simultaneously pump the gravel, mud, ore, discharge the water, and then picks the diamond ores. River alluvial depositĪccording to the location of alluvial deposits: it divides into existing rivers (wet deposit mining) and ancient river (dry land diamond deposit mining). Many primary mines are found by tracing back the placer deposits. Alluvial mining is the world’s main source of diamonds, accounting for 40 percent of the world’s total diamond reserves, but 70 percent of its production. The first diamond found in South Africa came from an alluvial deposit. Over thousands of years, eroded kimberlite carries rough diamonds downstream and enriches in the middle and lower reaches of the river, seashore and the offshore continental, form alluvial diamond deposit. Kimberlite is less resistant to weathering, the kimberlite that reaches the earth’s surface is eroded by natural force like wind, rain, fluviation. Low Intensity Dry Drum Magnetic SeparatorĪgitating chute is a new kind of gold and chip gold extraction machine…….

What is a dredge with a process plant