Novel system and method for producing potassium chloride by utilizing carnallite

Abstract

The invention discloses a novel system and method for producing potassium chloride by utilizing carnallite. The novel system for producing the potassium chloride by utilizing the carnallite comprises ore adding equipment, crystallization equipment, floatation equipment, filtration equipment, repulping and washing equipment, centrifuging and dehydrating equipment and drying and packaging equipment which are sequentially connected; a crushing machine is added on the ore adding equipment, so that a crystallization system can conveniently decompose crystals; meanwhile, in the crystallization equipment, a novel crystallizer invented by the company (described in the specification) is used for replacing carnallite decomposition equipment in the conventional cold decomposition-direct floatation technology. The novel system and method for producing the potassium chloride by utilizing the carnallite have the advantages that production technological conditions of the conventional direct floatation technology are improved, the recovery rate of potassium chloride is increased to 60%, a potassium chloride product with the purity of 90% is eliminated, the purity of the potassium chloride product is increased to 93-95%, product granularity is increased, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the fields of natural gas chemical industry and salt chemical industry, and particularly relates to a production system and method for producing potassium chloride by using Yantian carnallite ore as a raw material and adopting a positive flotation method. Background technique [0002] my country is a big agricultural country, and the development of agriculture is inseparable from chemical fertilizers. For a long time, there has been an imbalance of nitrogen, phosphorus and potassium in agricultural fertilization in my country, and soil potassium deficiency has become one of the important factors affecting the development of my country's agriculture. [0003] With the improvement of the development technology of potassium resources in my country, especially the development of Qarhan Salt Lake resources by Qinghai Salt Lake Industry Co., Ltd. and the improvement of the company's own science and technology, the development of pota...

AI Technical Summary

Problems solved by technology

However, compared with the reverse flotation-cold crystallization process independently developed by Qinghai Salt Lake Industry Co., Ltd., this process also has its own defects, mainly in: (1) The recovery rate of the potassium chloride system is low, and the product quality is not easy to improve

The process operation control requirements are strict, and the ore feeding control, decomposition water control, flotation operation, and flotation reagents all have an impact on the recovery rate and product quality. Lost in the mother liquor; the separation effect of potassium chloride and sodium chloride is poor during the flotation process, more sodium chloride is entrained in the concentrate foam, and the content of potassium chloride in the discarded tail salt is high, and some are even greater than 8%, which is close to industrial Utilization standard of raw ore; product quality is difficult to meet the national standard industrial potassium chloride superior product index

(2) The product has a fine particle size and is not easy to dry, resulting in high water consumption and drying energy consumption of the product, and high discharge of tail liquid

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