ES308099A1 - Procedure to benefit deposits of carnalite or carnalite-silvinita. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Procedure to benefit deposits of carnalite or carnallite-sylvinite, characterized by the fact that the mining works and soundings necessary to prepare a circuit of solutions or treatment waters are carried out in the deposit; the necessary pipes and valves are arranged to regulate the injection, formation of circuits of circulation and extraction of the solutions; in the barracks or field to be exploited, water or treatment solutions are injected which dissolve the magnesium chloride from the carnalite layer or layers and leave a mixture of sodium chloride and potassium chloride, which is the transformation-enriched sylvinite, maintaining the level of suitable liquid, the different solutions that are formed tend to be stratified in order of densities, accumulating the richest in magnesium chloride in the lower parts, when these solutions have a sufficient concentration in magnesium chloride, they are extracted for their evacuation or treatment by known methods; Following the injection of water or treatment solutions into the layer or layers of carnallite at the convenient points, with constant or variable liquid level, the transformation zone increases and three zones are extended and differentiated: a zone of salt free of chloride more or less large potassium, depending on whether the solutions or inlet waters have more or less potassium chloride; another area of transformation-enriched sylvinite in which the solutions circulating therein are saturated or nearly saturated in potassium chloride and sodium chloride with little or no magnesium chloride; and a third zone of carnallite, unprocessed or incompletely transformed, through which concentrated solutions of magnesium chloride circulate; the control of these three zones is done by polling and taking samples of the solutions in different points; To extend the formation of the three zones in the suitable way the following factors are combined among themselves: a) the variation of the liquid level; b) the composition and points of entry and exit of the solutions, c) secondary circuits are formed by taking solutions from one site and injecting it into another with or without heating or cooling, d) addition of fine substances to cover or hinder circulation, and ) accelerate the circulation by partial or local solutions, f) taking advantage of the circulation by density differences of the different liquids; The transformation-enriched sylvinite layers together with the silvinite layers of the deposit are exploited: A) By draining the enriched syllable from the joint or separated with the silvinite from the deposit by the known procedures, B) pressurized liquid that starts and drags the grains of potassium chloride and sodium chloride disintegrated together with the more or less thick pieces of salt, performing a mechanical separation of the sylvinite with treatment of the same by the known procedures, the start of the own sylvinite the deposit is made before or after and treated separately or joined before or after crushing it; C) By extraction of the potassium chloride in the form of a concentrated solution and treatment of these solutions by the known processes for separating the potassium chloride from the sludge that can be carried in suspension (if necessary) and the other salts dissolved by the known process of crystallization by cooling, separation of liquid-solid with washing and drying; The choice of solutions to be treated is made by taking samples at the different points of the exploitation field. (Machine-translation by Google Translate, not legally binding)