High-grade potassium chloride production system and method thereof

Abstract

The invention discloses a high-grade potassium chloride production system and a method thereof. The system comprises a raw ore screening and concentrating system, a size mixing system, a floatation system, a low sodium concentration and dehalogenation system, a cold crystallization and thick potassium screening system, a thick potassium concentration and dehalogenation system, a refined potassium washing and dehalogenation system, a piling and filtering storage stock ground system, a breaking and conveying system and a drying cooling, packing, stacking and line crossing conveying system, and all the systems are sequentially connected and are arranged in a three-dimensional mode. Materials enter a next system in a self-flowing mode. An automatic dosing, automatic water adding and dehalogenation device is adopted, a spiral screen type centrifugal machine is used for replacing a horizontal belt type filter, and other technology improvements are adopted, so that the potassium chloride grade is improved to 98 percent from 95 percent, the piling and filtering technology is adopted in the system so that the natural gas using amount can be saved, production operation is convenient, and equipment operation is stable.

Description

technical field [0001] The invention belongs to the field of energy-saving and environment-friendly production of potassium chloride products, and more specifically relates to a production system and method for producing high-grade and high-recovery potassium chloride using Yantian carnallite ore as a raw material. Background technique [0002] my country is a large agricultural country with a population of 1.3 billion, and the development of agriculture is the fundamental principle and policy of the country. To develop agriculture and increase food production, chemical fertilizers are one of the important factors. The slow development of potassium fertilizer production in our country is extremely disproportionate to the serious potassium deficiency in our soil and the increasing demand for potassium fertilizer in agricultural production. In order to solve the contradiction between the supply and demand of potash fertilizer in agriculture, the country spends a lot of foreig...

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Problems solved by technology

[0005] Its defects are: it does not involve the raw ore screening and concentration system, there is no high-efficiency stirring system, it cannot save flotation reagents, and the flotation efficiency is not high enough; there is no chain control of the liquid level (real liquid level) of the flotation machine and the discharge valve, and the product The recovery rate is not high; there is no PLC control system, and the automatic start-stop, automatic feeding, and automatic flushing of the centrifuge cannot be realized; the conventional method is used to measure the density of the pulp intermittently, with large human factors and non-continuous

[0006] The national invention patent carnallite production process of potassium chloride (patent No. 97103515.X) reflects a large number of control parameters, and the key process is manually adjusted to control the production (decomposition and crystallization process measures Baume degree to control the amount of water added), resulting in inconsistent control indicators. Stability, which ultimately affects product grade and recovery

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