May 17, 2015· gold wash plant with conveyor belt small sand gravel trommel screen, US $ 3000 - 4500 / Set, . Source from Jiangxi Hengcheng Mining Equipment Co., Ltd. on gold extraction techniques from rocks ore. . This method of screening helps not only to .. Enough details about the ores or slags shall be learned, sometimes a test is needed for some ores. 2.