FIELD: mining.
SUBSTANCE: deposit development method using underground solution involves the following stages at which: pressure pipeline is provided, which is passed to mineral deposit containing the required mineral; at that, pressure pipeline is provided with possibility of supplying the discharged fluid to mineral deposit in order to dilute the necessary mineral and to form the extracted brine; extraction pipeline is provided, which is passed to mineral deposit and provided with possibility of supplying the extracted brine to the ground surface; discharged fluid is pumped to pressure pipeline; extracted brine is cooled during its transportation through the supply pipeline and one or more heat exchangers to separation plant; at that, cooling of the extracted brine leads to deposition of the necessary mineral, and thus formation of pulp consisting of solid crystals of the necessary mineral, which are suspended in brine; solid crystals of the necessary mineral are separated from brine in separation plant, thus forming the flow of depleted liquid brine and extracting the product in the form of solid crystals of mineral; depleted brine is transported through one or more heat exchangers to pressure pipeline; at that, discharged fluid contains the above depleted brine, and by performing the heat exchange between extracted brine and depleted brine in one or more heat exchangers in order to cool down the extracted brine and heat the depleted brine; at that, mineral crystallisation to the product in the form of solid crystals is performed due to temperature decrease of extracted brine, which takes place in the section between mineral deposit and separation plant due to heat removal from extracted brine; at that, heat removal from extracted brine is mainly performed due to heat transfer from extracted brine to depleted brine in one or more heat exchangers and heat dissipation from extracted brine to atmosphere when the extracted brine is being transported in extraction pipeline, one ore more heat exchangers and transfer pipeline to separation plant.
EFFECT: invention allows improving leaching efficiency.
21 cl, 3 dwg
