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| PROCESS FOR EXTRACTING GOLD AND(OR) SILVER OUT OF WASTE MATERIALS |
| FIELD: extraction of gold and(or) silver out of waste materials in electronics, electrochemical and jewellery industry branches.
EFFECT: possibility for increasing dissolution rate of gold and silver. |
| Publishing date: February 4, 2003 |
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| DEVICE FOR FORMATION OF DIRECTED FRACTURES IN WELLS |
| FIELD: mining; applicable in formation of initiating fracture in well, presetting the orientation of rock fracturing plane in mining of valuable crystalline raw materials and stone, construction of roads and tunnels in mountainous regions, and breakage of oversizes.
EFFECT: increased efficiency of device operation, reduced time for rock fracturing, simplified design of device. 4 cl, 3 dwg |
| Publishing date: July 23, 2002 |
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| METHOD OF FLAMELESS BREAKAGE OF SOLID BODIES AND DEVICE FOR ITS EMBODIMENT |
| FIELD: technology of blasting operations, particularly, flameless blasting of rocks.
EFFECT: higher safety of operation with flameless breakage of solid bodies. 2 cl, 1 dwg |
| Publishing date: July 23, 2002 |
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