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Production method of potash magnesium sulfate fertilizer

A technology of potassium magnesium sulfate fertilizer and production method, which is applied in the production field of potassium magnesium sulfate fertilizer, can solve problems such as excessive chloride ions and failure to meet the quality requirements of potassium magnesium sulfate fertilizer, and achieve low production cost, guaranteed quality, and market source wide range of effects

Inactive Publication Date: 2015-01-28
LOMON LAND AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some blended potassium and magnesium sulfate fertilizer products currently on the market contain potassium, sulfur, and magnesium, but some chloride ions exceed the standard, and some products contain more magnesium than potassium, and these products cannot reach potassium sulfate. Quality requirements for magnesium fertilizer

Method used

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  • Production method of potash magnesium sulfate fertilizer
  • Production method of potash magnesium sulfate fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of potassium bisulfate slurry:

[0029] Add 108.9Kg concentrated sulfuric acid (H 2 SO 4 mass content 90%), stir and heat the reactor to 80°C, then add 149Kg potassium chloride solution (KCl mass content 50%) into the reactor, keep the temperature in the reactor at 80°C and continue stirring for 30min to make the hydrogen chloride gas completely Escape, obtain potassium bisulfate slurry 221.4Kg (KHSO 4 mass content 61.4%).

[0030] (2) Preparation of magnesium oxide slurry:

[0031] Add 40Kg of magnesia and 20Kg of clear water into a plastic bucket, and stir to prepare 60Kg of magnesia slurry for use (66.7% MgO mass content).

[0032] (3) Neutralization reaction:

[0033] Add the magnesium oxide slurry prepared in (2) to the potassium bisulfate slurry obtained in (1), heat the temperature of the reaction kettle to 120°C, and continue stirring for 5-10 minutes to obtain the potassium magnesium sulfate slurry.

[0034] (4) Cooling, crushing and drying:...

Embodiment 2

[0037] (1) Preparation of potassium bisulfate slurry:

[0038] Add 105.4Kg concentrated sulfuric acid (H 2 SO 4 mass content 93%), stir and heat the reactor to 120°C, then add 120.2Kg potassium chloride solution (KCl mass content 62%) into the reactor, keep the temperature in the reactor at 120°C and continue to stir for 45min to make hydrogen chloride gas All escape, obtain potassium bisulfate slurry 189.1Kg (KHSO 4 mass content 71.9%).

[0039] (2) Preparation of magnesium oxide slurry:

[0040] Add 40Kg of magnesia and 40Kg of clear water into a plastic bucket, stir to prepare 80Kg of magnesia slurry for use (MgO mass content 50%).

[0041] (3) Neutralization reaction:

[0042] Add the magnesium oxide slurry prepared in (2) to the potassium hydrogen sulfate slurry obtained in (1), heat the temperature of the reaction kettle to 140°C, and continue stirring for 5-10 minutes to obtain the potassium magnesium sulfate slurry.

[0043] (4) Cooling, crushing and drying:

[...

Embodiment 3

[0046] (1) Preparation of potassium bisulfate slurry:

[0047] Add 123.8Kg concentrated sulfuric acid (H 2 SO 4 mass content 95%), stir and heat the reactor to 140°C, then add 106.4Kg potassium chloride solution (KCl mass content 70%) into the reactor, keep the temperature in the reactor at 140°C and continue stirring for 60min to make hydrogen chloride gas All escape, obtain potassium bisulfate slurry 193.7Kg (KHSO 4 mass content 70.2%).

[0048] (2) Preparation of magnesium oxide slurry:

[0049] Add 40Kg of magnesia and 80Kg of clear water into a plastic bucket, stir and prepare to obtain 120Kg of magnesia slurry for use (MgO mass content 33.2%).

[0050] (3) Neutralization reaction:

[0051] Add the magnesium oxide slurry prepared in (2) to the potassium bisulfate slurry obtained in (1), heat the temperature of the reaction kettle to 160°C, and continue stirring for 5-10 minutes to obtain the potassium magnesium sulfate slurry.

[0052] (4) Cooling, crushing and dryi...

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Abstract

The invention discloses a production method of a potash magnesium sulfate fertilizer. According to the production method, potassium chloride, concentrated sulfuric acid and magnesium oxide are taken as raw materials; the potassium chloride reacts with the concentrated sulfuric acid to obtain potassium hydrogen sulfate slurry; the potassium hydrogen sulfate slurry reacts with a magnesium oxide slurry to obtain potash magnesium sulfate slurry, and finally, the potash magnesium sulfate slurry is cooled, crushed and dried to obtain the potash magnesium sulfate fertilizer. The preparation method of the potash magnesium sulfate fertilizer is wide in raw material source, high in product yield and low in production cost. A potassium chloride low-temperature transformation production process is adopted, the raw materials are added according to a formula in batches, the process flow is simple and easy to control, and the quality of the product can be completely guaranteed; and the grade of the obtained potash magnesium sulfate fertilizer is up to or exceeds the national potash magnesium sulfate fertilizer first-grade standard.

Description

technical field [0001] The invention specifically relates to a production method of potassium magnesium sulfate fertilizer, which belongs to the technical field of chemical fertilizer production. Background technique [0002] The molecular formula of potassium magnesium sulfate fertilizer is K 2 SO 4 m(MgSO 4 )·nH 2 O (where m=1~2, n=0~6), it is an inorganic green fertilizer rich in K, Mg and S. It has excellent water solubility and can not only provide plants with potassium, magnesium and Sulfur element can loosen the soil, promote the growth and development of leaves, branches and roots of plants, and make the root system of plants huge. At the same time, it can promote plants to absorb nitrogen, phosphorus and other elements in the soil faster, and increase the ability of plants to resist diseases. Potassium magnesium sulfate is a chemically neutral salt, and its application will not affect the pH value of the soil. In addition, the content of chloride radicals is low...

Claims

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Application Information

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IPC IPC(8): C05D1/02
CPCC05D1/02C05D5/00
Inventor 李彬张洪江杨柳
Owner LOMON LAND AGRI
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