SU608762A1

SU608762A1 - Method of dissolving polymineral sulfate chloride potassium ore

Info

Publication number: SU608762A1
Application number: SU742033803A
Authority: SU
Inventors: Олег Дмитриевич Лях; Леонид Васильевич Писарев; Александр Петрович Рубель
Original assignee: Одесский ордена Трудового Красного Знамени политехнический институт
Priority date: 1974-06-17
Filing date: 1974-06-17
Publication date: 1978-05-30

Description

1one

Изобретение относитс к способам растворени полиминеральных калийных руд.This invention relates to methods for dissolving polymineral potash ores.

Известен способ растворени полиминеральных калийных руд Предкарпать , заключающийс в обработке руды концентрированными оборотными, в основном хлоридными. растворами при температуре свыпле 60°С. После обработки руды такими растворами остаетс нерастворенный остаток на основе хлорида натри (до 50% NaCl), который содержит 70% натри , около 90% кали , до 40% магни от количества, поступающего с перерабатываемой рудой. Этот остаток дополнительно перерабатывают с целью извлечени кали 1.A known method for dissolving polymineral potash ores is Predcarpat, which consists in treating the ore with concentrated circulating, mainly chloride ores. solutions at a temperature of 60 ° C. After ore is treated with such solutions, an undissolved residue based on sodium chloride (up to 50% NaCl), which contains 70% sodium, about 90% potassium, up to 40% magnesium, from the amount supplied with the ore being processed, remains. This residue is further processed to extract potassium 1.

Недостатками такого способа вл ютс низка степень извлечени кали (70%), образование труднофильтрующегос мелкодисперсного солевого шлама на основе хлорида натри и необходимость дополнительной переработки хлоридного нерастворенного остатка .The disadvantages of this method are the low degree of potassium recovery (70%), the formation of difficult-to-filter fine salt slurry based on sodium chloride and the need for additional processing of the insoluble chloride residue.

Известен также способ растворени полиминеральной хлоридно-сульфатной калийной руды разбавленными сульфатными растворами (2), при котором большинство составл ющих руду минералов переходит в жидкую фазу и отдел етс от нерастворенного остатка, состо щего в основном из песково-илистных фракций 2.There is also known a method for dissolving polymineralic chloride-sulphate potash ore with dilute sulphate solutions (2), in which most of the minerals that make up the ore go into the liquid phase and are separated from the undissolved residue, consisting mainly of sandy-clay fractions 2.

Недостатком этого способа вл етс образование труднофильтруемой суспензии, содержащей частицы мелкодисперсного нла.The disadvantage of this method is the formation of a hardly filterable suspension containing particles of fine nla.

Цель изобретени - получение легкофильтрующейс суспензии.The purpose of the invention is to obtain a light-filtration suspension.

Это достигаетс тем, что руду обрабатывают насыщенным по сульфату натри раствором при температуре 35-45°С.This is achieved by treating the ore with a saturated sodium sulfate solution at a temperature of 35-45 ° C.

При этом раствор сульфата натри берут в количестве, достаточном дл эквивалентного обмена между ионами хлора, содержащимис в руде, и сульфат-ионами.In this case, a solution of sodium sulfate is taken in an amount sufficient for an equivalent exchange between the chlorine ions contained in the ore and the sulfate ions.

Предложенный способ позвол ет повысить скорость фильтрации суспензии до 900 против 250 по известному способу.The proposed method allows to increase the filtration rate of the suspension to 900 versus 250 by a known method.

Claims

Example. 100 g of potash ore, crushed to a fineness: 0.5 mm, are treated with stirring with 160 ml of a saturated solution of sodium sulfate for 90 minutes at a temperature of 40 ° C. The resulting suspension is filtered at a rate of 80 ml / cm-h under a vacuum of 550 mm Hg. Art. and obtaining a filtrate and sulphate precipitate. The filtrate (chloride sulfate solution) is cooled in a refrigerator at 1 ° C for 3 hours, then the precipitated crystals of sodium sulfate are separated from the chloride brine. The sulphate precipitate is dissolved with stirring in 80 ml of water and 64 ml of washing solution for 30 minutes at 40 ° C and then filtered at a rate of 30 ml / cm-h under a vacuum of 550 mm Hg. Art., obtaining a sulphate solution, processing ore, and undissolved residue. The undissolved residue is washed with 50 ml of water and filtered. The washed undissolved residue is removed from the process, and the washing solution is sent to the treatment of the sulphate precipitate. The result is a saturated solution, which contains 80-85% Kaln, about 70% magnesium and 99% chlorine of their amount in the ore processed. Claim 1. Method for dissolving polymineral chloride-sulphate potassium ore by sulphate solutions when moving and heating, followed by filtering the resulting suspension, characterized in that, in order to obtain a light-filtration suspension, polymineralic ore is treated with a solution saturated with sodium sulfate at 35-45 ° WITH. 2. A method according to claim 1, characterized in that said solution is taken in an amount sufficient for an equivalent exchange between the chlorine ions contained in the ore and the sulfate ions. Sources of information taken into account during the examination 1. Technological regulation of Kalushsky chemical-metallurgical plant, 1973.

2. Pozin ME. Technologists of mineral salts. “Goskhimizdat, 1974, t. 1, p. 173-177.