RU2012130764A

RU2012130764A - METHOD FOR OBTAINING SYNTHETIC CARNALLITIS

Info

Publication number: RU2012130764A
Application number: RU2012130764/05A
Authority: RU
Inventors: Михаил Юрьевич Ширев; Владимир Александрович Лебедев
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2014-01-27
Also published as: RU2532433C2

Abstract

Способ получения синтетического карналлита, включающий очистку и концентрирование хлормагниевых растворов, их смешение с твердым измельченным калиевым электролитом, нагрев и охлаждение смеси при постоянном перемешивании с получением синтетического карналлита, содержащего не более 5% мас. жидкой фазы, с введением частично обезвоженного карналлита в виде пыли печей обезвоживания карналлита в процессе синтеза, отличающийся тем, что перед смешением отработанный электролит нагревают выделенными из зоны нагрева тазами, а на стадии растворения реакционную смесь нагревают до температуры не более 120°C при массовом соотношении KCl/MgClв реакционной смеси 0,78-0,83, причем начальная концентрация хлористого магния в растворесоставляет 23-32 мас.%, а пыль печей обезвоживания карналлита вводят в смесь при содержании общей воды в системе 42-52 мас.%.A method of producing synthetic carnallite, including the purification and concentration of magnesium chloride solutions, mixing them with solid powdered potassium electrolyte, heating and cooling the mixture with constant stirring to obtain synthetic carnallite containing not more than 5% wt. liquid phase, with the introduction of partially dehydrated carnallite in the form of dust from carnallite dehydration furnaces in the synthesis process, characterized in that before mixing the spent electrolyte is heated by basins separated from the heating zone, and at the stage of dissolution, the reaction mixture is heated to a temperature of no more than 120 ° C in a mass ratio KCl / MgCl in the reaction mixture is 0.78-0.83, and the initial concentration of magnesium chloride in the solution is 23-32 wt.%, And the dust of the carnallite dehydration furnaces is introduced into the mixture when the total water content in the system is 42-52 ma .%.

Claims

A method of producing synthetic carnallite, including the purification and concentration of magnesium chloride solutions, mixing them with solid powdered potassium electrolyte, heating and cooling the mixture with constant stirring to obtain synthetic carnallite containing not more than 5% wt. liquid phase, with the introduction of partially dehydrated carnallite in the form of dust from carnallite dehydration furnaces in the synthesis process, characterized in that before mixing the spent electrolyte is heated by basins isolated from the heating zone, and at the stage of dissolution, the reaction mixture is heated to a temperature of not more than 120 ° C in a mass ratio KCl / MgCl₂ in the reaction mixture of 0.78-0.83, and the initial concentration of magnesium chloride in solution is 23-32 wt.%, and the dust of the carnallite dehydration furnaces is introduced into the mixture with a total water content of 42-52 wt.% in the system.