DEVICE FOR BORE-HOLE HYDRAULIC EXTRACTION OF MINERALS Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: this relates to devices for hydraulic extraction of minerals from bore-holes and can be used for recovering minerals from underground formations represented by metal-bearing sands, fine gravel, etc. Device is made up of three parts: upper head-piece, pipe column, and lower head-piece. Upper head-piece has two inlets. One of inlets is intended for delivery of operating water, other inlet is intended for supply of compressed air. In addition, upper head-piece is provided with outlet for discharge of slurry from slurry pipeline to ground surface. Pipe column incorporates three strings of pipes which are installed concentrically one above other. One of pipe strings (external) is of high-pressure type, intermediate pipe string functions as slurry pipeline, and internal pipe string is used for supply of compressed air. Lower head-piece has hydraulic giant and hydraulic elevator which is made up of hydraulic elevator attachment and mixing chamber which transfers into slurry pipeline. Mixer of compressed air supply pipe string is arranged in slurry pipeline above hydraulic giant and mixing chamber of hydraulic elevator. Upper end of compressed air supply pipe is brought through slurry pipeline outlet hole into upper head-piece. In addition, lower head-piece is provided with end-face hydraulic giant nozzle which is located in its bottom part. Application of aforesaid device allows for increasing depth in extraction of minerals. this embodiment also simplifies design of device and reduces labour needed for its installing and dismantling. EFFECT: higher efficiency. 1 cl, 1 dwg