Process for producing soft potassium magnesium vanadium

Abstract

A process for preparing soft KMgV from the mixed K salt generated by sunning the sulfate-type bittern includes such steps as breaking, sieving, stage-one converting, mechanical separation of sodium chloride, stage-two converting, and drying. Its advantages are high output rate and high purity of product.

Description

1. Technical field:

[0001] The invention relates to a process technology for producing schite as a raw material with potassium mixed salt prepared by drying with sulfate-type brine, and belongs to the technical field of salt chemical industry. 2. Background technology:

[0002] The chemical formula of Magnesite is: MgSO 4 ·K 2 SO 4 ·6H 2 O, is a high-quality fertilizer that can provide necessary nutrients such as potassium, magnesium, and sulfur for crop growth, and becomes potassium-magnesium sulfate fertilizer. Its raw material, potassium mixed salt, is obtained by evaporating and sun-drying sulfate-type brine, and it is a mixture of minerals such as sylvite, carnallite, kaleite, epsomite, and halite. At present, the relatively mature production processes in the world can be divided into four categories: (1) Flotation method: the potassium mixed salt ore made by the magnesium sulfate salt type brine after de-sodiumization and drying is ground to form a slurry, which is...