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A kind of preparation method of carnallite ore

A technology of carnallite ore and brine, applied in the direction of magnesium halide, alkali metal halide purification, alkali metal chloride, etc., can solve the problems of long cycle and poor quality of carnallite ore, and achieve easy operation and simple technology Effect

Active Publication Date: 2016-08-31
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the disadvantages of long cycle and poor quality in the preparation of carnallite ore in the prior art, and provide a short cycle and high-efficiency preparation method of carnallite ore

Method used

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  • A kind of preparation method of carnallite ore

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preparation example Construction

[0022] see figure 1 , figure 1 The step flowchart 100 of the preparation method of the carnallite ore provided by the embodiment of the present invention, from figure 1 Visible in, the preparation method of carnallite ore comprises the following steps:

[0023] Step S110: preparing potassium salt saturated brine;

[0024] Preferably, the preparation of the potassium salt saturated brine specifically includes: evaporating the salt lake brine through a salt pan to obtain the potassium salt saturated brine.

[0025] Preferably, the preparation of the potassium salt saturated brine includes: producing potassium chloride by cold decomposition flotation of carnallite ore, and collecting the tail liquid to obtain the potassium salt saturated brine.

[0026] Step S120: uniformly mixing the potassium salt saturated brine and bischofolite solid ore, and stirring to obtain a solid-liquid reaction product;

[0027] Specifically, the above-mentioned potassium salt saturated brine and b...

Embodiment 1

[0037] Adopt carnallite ore cold decomposition flotation method to produce the tail liquid of potassium chloride, obtain potassium salt saturated bittern, and take potassium salt saturated bittern 8.60Kg (wherein, K content 1.71%, Mg content 6.46%), in addition, weigh Take 3.0Kg of bischofite ore (wherein, the K content is less than 0.1%, the Mg content is 11.74%, and the Cl content is 31.64%), and they are placed in the reaction tank together, and the solid-liquid separation is carried out after stirring for 1 hour; the carnallite in the solid phase is obtained. ore 1.51Kg (K content 8.36%, Mg content 7.49%) to obtain 10.08Kg (K content 0.14%) of bischofite saturated brine in the liquid phase.

[0038] In this embodiment, the 8.60 Kg of tail brine in the production of potash fertilizer is the tail brine produced during the production of about 1 Kg (93%-95% potash fertilizer). According to the current potash fertilizer production yield of about 70%, the production of 1Kg (93% ...

Embodiment 2

[0040] Take by weighing carnallite saturated halogen 15.00Kg (wherein, K content 1.44%, Mg content 6.84%), take by weighing bischofsite ore 5.60Kg (wherein, K content is less than 0.1%, Mg content 11.93%, Cl content 33.24%) ), are placed in the reaction tank together, and carry out solid-liquid separation after stirring for 1 hour; Separation obtains solid phase carnallite ore 2.40Kg (K content 8.26%, Mg content 8.70%), obtains liquid phase bischofite saturation Brine 17.38Kg (K content 0.13%).

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Abstract

The invention provides a carnallite ore preparation method. The method comprises the following steps: uniformly mixing prepared potassium salt saturated brine with bischofite solid ores, stirring to obtain solid and liquid reactants, and carrying out solid-liquid separation to obtain solid carnallite ores. The bischofite solid ores have large dissolvability and are dissolved in the potassium salt saturated brine, so potassium ions in the potassium salt saturated brine precipitate as carnallite through the a salting-out effect, thereby the carnallite ores can be rapidly obtained from the potassium salt saturated brine.

Description

【Technical field】 [0001] The invention relates to the technical field of potash fertilizer preparation, and in particular to a method for preparing carnallite ore and its application. 【Background technique】 [0002] At present, salt lake potassium chloride fertilizer production raw materials at home and abroad are generally used in Yantian carnallite ore. As salt field production is an extensive technology, the quality and output of Yantian carnallite mines are greatly affected by natural factors, and fluctuations in mineral quality have a very negative impact on the subsequent production of potassium chloride; at the same time, salt field production is based on the use of natural energy. For production facilities that carry out evaporation, the production of carnallite ore needs a certain period. For enterprises that urgently need carnallite ore to produce potassium chloride, to a certain extent, a kind of unfavorable situation of "waiting for rice to cook" has been formed;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/30C01D3/06C01D3/16C05D1/02
Inventor 董生发张志宏周园马艳芳付振海赵冬梅张永明
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI