Method for producing full-water-soluble flaky magnesium nitrate through steel belt granulator

A technology of magnesium nitrate and granulator, applied in directions such as magnesium nitrate, can solve problems such as poor water solubility, easy agglomeration and purity of magnesium nitrate, achieve the effects of improving water solubility and content, facilitating storage and transportation, and solving poor water solubility
CN104098115AActive Publication Date: 2014-10-15SHANXI JIAOCHENG HONGXING CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANXI JIAOCHENG HONGXING CHEM
Publication Date
2014-10-15

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Abstract

The invention relates to a production technology of magnesium nitrate in the fertilizer field, particularly to a method for producing full-water-soluble flaky magnesium nitrate through a steel belt granulator, and solves the technical problems that magnesium nitrate products are poor in water solubility, can cake easily and are lower in purity at present. The method comprises the steps as follows: (a) adding magnesium oxide and a dilute nitric acid into a reaction kettle for a neutralization reaction; (b) filtering an obtained magnesium nitrate neutralization solution; (c) pumping a filtrate into an evaporator for evaporation concentration; (d) pumping the concentrated magnesium nitrate solution into a cooling crystallization kettle; (e) leading magnesium nitrate crystals and mother liquor into a centrifuge for separation operation to obtain white needle-like magnesium nitrate crystals; (f) introducing the white magnesium nitrate crystals into a dissolving tank for concentration; (g) enabling a concentrated solution to enter the steel belt granulator to generate a round flaky magnesium nitrate product. The problems that the magnesium nitrate products are poor in water solubility, are lower in purity, can cake easily and the like in the prior art are fundamentally solved with the method.
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Description

technical field

[0001] The invention relates to a production process of magnesium nitrate in the field of chemical fertilizers, in particular to a method for producing fully water-soluble flake magnesium nitrate by using a steel belt granulator. Background technique

[0002] Magnesium nitrate hexahydrate crystals (or granules) used in the fertilizer industry produced by the prior art require the product to have a pH range of 6 to 7 in order to prevent soil acidification, but under this pH condition, when the product is dissolved in water, it will appear Visible white flocculent water-insoluble substances are prone to spray blockage during spraying, which greatly limits the application of this product on spraying equipment; at the same time, because there are a large number of free water molecules on the surface of crystals (or particles) , which makes the product prone to agglomeration in packaging and transportation, which is not conducive to long-distance transportation an...

Claims

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