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Spiral Chute is earliest manganese ore beneficiation.Ancient XuanShou heavy placer with elutriation method, the tools used chute is the original.Some coarse placer gold tin chute chute and sand lineage still have use.The middle of the 19th century in the mechanical transmission belt chute and the circular chute, became a fine-grained non-ferrous metal ore main sorting equipment.After the jig and shaking table, the application of the chute is relatively reduced.But the chute with its simple structure, low production cost advantages, is still in the coarse, medium and sorting of fine grained ores are widely used.This century 40 s multi-layer automatic chute, sharp shrinkage chute in the '50 s and 60 s made of the cone concentrator, shaking double bed, etc., opened up a chute the path of modernisation.Slime chute has become an effective method for treatment of fine grained ores. 
  Main advantage of the chute is gravity separation equipment has simple structure, low investment and production cost, coarse, medium grained chute and high processing capacity, the disadvantage is that sorting accuracy is lower, and therefore suitable for roughing equipment.Now widely used in the processing of tungsten, tin, gold, platinum, iron and some rare metal ore, especially in the treatment of low grade application more sands.