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Method for producing agricultural mineral base potassium nitrate by using potassium-rich rock

A technology of potassium-rich rock and potassium nitrate, applied in the fields of alkali metal nitrate preparation, potash fertilizer, application, etc., can solve problems such as unrealized industrial production, and achieve high-efficiency utilization and high resource utilization

Active Publication Date: 2012-05-30
SHAANXI DAQIN POTASSIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japan used high temperature and high pressure alkali dissolution method to decompose potassium feldspar, and India also used high temperature roasting sulfuric acid method to decompose potassium feldspar to produce potassium sulfate, but neither of them has achieved industrial production

Method used

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  • Method for producing agricultural mineral base potassium nitrate by using potassium-rich rock
  • Method for producing agricultural mineral base potassium nitrate by using potassium-rich rock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Potassium-rich rock raw material: Muscovite syenite from a certain place in Lushi County, Henan Province, the chemical composition is as follows (%):

[0035] SiO 2 TiO 2 Al 2 o 3 Fe 2 o 3 FeO MnO MgO CaO Na 2 OK 2 OP 2 o 5 Loss on ignition Total

[0036] 58.01 0.93 17.87 3.93 0.32 0.02 0.30 1.06 0.28 14.69 0.09 1.82 99.32

[0037] According to the chemical composition of the whole rock and the X-ray powder crystal diffraction analysis results, the phase composition of the muscovite syenite is: 85.5% microplagioclase, 7.6% muscovite, 2.4% titanite, 1.1% magnetite, red Iron ore 2.7%, apatite 0.2%.

[0038] The experimental process is as follows:

[0039] (1) Grinding muscovite syenite to -300 mesh > 90% particle size, according to potassium feldspar powder: lime is the mass ratio batching of 1: 0.83, gets potassium feldspar powder 300g, lime 249g, according to Water-solid mass ratio 20:1 was added to the reaction kettle, fully stirred evenly;

[...

Embodiment 2

[0046] In order to obtain a high content of KNO 3 The product, adopts the same raw material as in Example 1, the experimental process is the same as the (1) step-(5) step of Example 1, after completing the (5) step, add to the step (5) gained slurry Potassium nitrate saturated solution, till toberberberite is all adsorbed, then carry out the granulation, drying process described in step (6) identical with embodiment 1, make mineral base potassium nitrate product 636.4g. After determination, the KNO in the obtained product 3 The content is 58.6% (mass percentage).

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Abstract

The invention relates to a method for producing mineral-based potassium nitrate for agricultural use through rocks rich in potassium. The method comprises the following steps: crushing the rocks rich in the potassium, and milling the rocks after mineral dressing and trash extraction to obtain the powder with the main phase of potash feldspar; mixing the potash feldspar powder and lime according to the mass ratio of 1: 0.80-0.85, adding water according to the solid-liquid mass ratio of 1: 15-25, stirring and mixing the materials for reactions in a reaction kettle, carrying out a hydrothermal reaction on the condition of stirring at a temperature of between 180 and 250 DEG C, carrying out the reaction at constant temperature for 5 to 10 hours to obtain KOH solution and tobermorite; and preparing potassium nitrate through the obtained KOH solution, compounding the potassium nitrate with the tobermorite, and adding a binder for granulation and forming so as to obtain the novel mineral-based potassium nitrate for agricultural use. The KNO3 nutrient content can be adjusted in the range of between 22.0 and 58.6 percent.

Description

technical field [0001] The invention relates to a method for producing agricultural mineral-based potassium nitrate by utilizing potassium-rich rock. technical background [0002] Water-soluble potassium salt resources are very scarce in my country. In order to solve the serious shortage of agricultural potassium fertilizers, the state focuses on the development of water-soluble potassium salt in Qinghai Chaerhan Salt Lake. A large amount of potassium chloride is imported from abroad every year, but it still cannot fully meet the needs of the country. domestic demand. my country is rich in non-water-soluble potassium mineral resources, and the main types of potassium-rich rocks are syenite, nepheline syenite, potassium-rich volcanic rock, pegmatite, potassium-rich shale, and potassium-rich slate. It is estimated that the total amount of non-water-soluble potassium ore resources in the country exceeds 20 billion tons. Therefore, the use of potassium-rich rocks to produce agr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D1/04C01D9/04
Inventor 马鸿文郑红彭辉郑雁戚洪彬王英滨
Owner SHAANXI DAQIN POTASSIUM CO LTD
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