Method for preparation of superior grade potassium magnesium sulfate fertilizer from crude potassium chloride and crude picromerite

A technology of potassium-magnesium sulfate fertilizer and strontium ferrite, applied in the directions of potash fertilizer, application, inorganic fertilizer, etc., can solve problems such as potassium-free magnesium fertilizer, etc., and achieve the effects of easier operation, improved grade, and short process route

Inactive Publication Date: 2018-04-20
SDIC XINJIANG LUOBUPO POTASH CO LTD
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Problems solved by technology

[0003] The production technology of first-class potassium-magnesium fertilizers is relatively mature, but there is still no superior products of potassium-magnesium fer

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  • Method for preparation of superior grade potassium magnesium sulfate fertilizer from crude potassium chloride and crude picromerite
  • Method for preparation of superior grade potassium magnesium sulfate fertilizer from crude potassium chloride and crude picromerite

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Embodiment Construction

[0009] A kind of method that utilizes crude potassium chloride and coarse langbeinite to produce high-grade potassium magnesium sulfate fertilizer, such as figure 1 As shown, (1) Decomposition flotation section: Take carnallite ore and add it to the washing mother liquor, and decompose it in the environment of 23-27 ° C. After decomposition, Mg 2+ content ≥ 5.8wt%, adjust the slurry concentration to [20 ± 1]wt% for flotation, the obtained contains K + The crude potassium chloride with the content ≥ 22wt% is used as the raw material for the preparation of high-grade potassium magnesium sulfate fertilizer; the component of carnallite is: K + 6.0~8.5wt%, Mg 2+ 6.2~8.8wt%, Na + 5.0~8.5wt%, SO 4 2- 10.0~16.0wt%, Cl - (2) ball mill conversion flotation section: take potassium mixed salt ore and add water to ball mill, and the grinding concentration is controlled at 55~65wt%, so that the particle size in the potassium mixed salt after grinding is 100 mesh Some account for more ...

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Abstract

Belonging to improvement of superior grade potassium magnesium sulfate preparation technology, the invention specifically relates to a method for preparation of a superior grade potassium magnesium sulfate fertilizer from crude potassium chloride and crude picromerite. The method includes: (1) a decomposition-flotation section; (2) a ball-milling conversion flotation section; (3) a conversion section; (4) a separation-leaching section; and (5) a drying section. The method provided by the invention can obtain high-grade superior potassium magnesium fertilizer, and realizes the zero breakthroughof superior potassium magnesium fertilizer. The method mainly controls the adding dosage and conversion water amount of crude potassium chloride to convert potassium chloride and part of picromeriteinto glaserite, thus improving the product grade. The method provided by the invention has the advantages of simple principle, short process route, easy operation, and a K<+> recovery rate of 60% or more.

Description

technical field [0001] The invention belongs to the improvement of the preparation process of high-grade potassium magnesium sulfate fertilizer, in particular to a method for preparing high-grade potassium magnesium sulfate fertilizer by using crude potassium chloride and rough langbeinite. Background technique [0002] Magnesite, also known as potassium magnesium sulfate fertilizer, is a high-quality fertilizer that can provide nutrients such as potassium, magnesium, and sulfur necessary for crop growth. The preparation methods of langbeinite can be divided into three categories. The first type uses solid potassium minerals such as potassium feldspar as raw materials. After the potassium feldspar is crushed, coarsely ground, and sieved, it is roasted at a medium temperature with high-temperature salt in a salt lake. The sintered product is mixed with water and soaked in water for 3 hours. Sharp salt, solid-liquid separation and washing to obtain langbeinite (CN101602617B)....

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Application Information

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IPC IPC(8): C05D1/04
CPCC05D1/04
Inventor 李守江董广峰胡莉马松亮郭翔要璇唐二峰黄理学张军李波
Owner SDIC XINJIANG LUOBUPO POTASH CO LTD
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