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Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction

A potassium-rich rock, chemical reaction technology, applied in chemical instruments and methods, potash fertilizers, inorganic chemistry, etc., can solve the problems of high cost, limited range of raw materials, etc., and achieve the effect of reducing production cost, increasing specific surface area, and convenient operation.

Inactive Publication Date: 2004-06-30
ZHONGKE JIANCHENG MINERAL TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventor has applied for two invention patents in 2001 for this reason, and its application number is respectively 01100474.6 and 01100475.4, but the alkaline raw material that adopts in the preparation technology of these two inventions is only limited to the very high pure lime that contains CaO, like this The range of raw materials is limited, and the cost is relatively high

Method used

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  • Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction
  • Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Select raw materials, including:

[0048] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, and its chemical composition (%) is as follows: SiO 2 TiO 2 Al 2 O 3 Fe 2 O 3 +FeO MnO 2 CaO MgO K 2 O Na 2 O P 2 O 5 Total loss on ignition 60.78 0.75 17.07 4.98 0.02 0.15 0.39 13.48 0.22 0.06 1.96 99.86

[0049] X-ray powder crystal diffraction analysis indicated that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

[0050] Dolomite lime: CaO 53.23%, MgO 36.27%, loss on ignition 8.07%, taken from the Babaoshan limestone mine in Huailai County, Hebei Province.

[0051] Hemihydrate gypsum: purchased from the market.

[0052] (2) Put 5.000 g of potassium-rich rock coarse powder, 5.000 g of coarse dolomitic lime powder, and 1.000 g of hemihydrate gypsum into a vibrating mill to fully grind them so that the particle size of the above-mentioned materials is below 200 meshes, and mix them evenly, and pl...

Embodiment 2

[0060] (1) Select raw materials, including:

[0061] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows: SiO 2 TiO 2 Al 2 O 3 Fe 2 O 3 +FeO MnO 2 CaO MgO K 2 O Na 2 O P 2 O 5Total loss on ignition 60.78 0.75 17.07 4.98 0.02 0.15 0.39 13.4 0.22 0.06 1.96 99.86

[0062] 8

[0063] X-ray powder crystal diffraction analysis indicated that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

[0064] Lime: CaO content 97%, purchased from the market.

[0065] Hemihydrate gypsum: purchased from the market.

[0066] (2) Put 5.000 g of potassium-rich rock coarse powder, 5.000 g of coarse lime powder, and 1.000 g of hemihydrate gypsum into a vibrating grinder to fully grind them so that the particle size of the above-mentioned materials is below 200 meshes, and mix them evenly, and add them in a plastic container 16.5ml of water, then transfer the materials to a plastic cont...

Embodiment 3

[0074] (1) Select raw materials, including:

[0075] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows: SiO 2 TiO 2 Al 2 O 3 Fe 2 O 3 +FeO MnO 2 CaO MgO K 2 O Na 2 O P 2 O 5 Total loss on ignition 60.78 0.75 17.07 4.98 0.02 0.15 0.39 13.48 0.22 0.06 1.96 99.86

[0076] X-ray powder crystal diffraction analysis indicated that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

[0077] Light burned magnesia: MgO 68.27%, CaO 4.17%, loss on ignition 4.50%, taken from Dashiqiao Magnesite Mine of Yingkou Magnesite Chemical (Group) Co., Ltd., Liaoning Province.

[0078] Hemihydrate gypsum: purchased from the market.

[0079] (2) Put 10.000 g of potassium-rich rock coarse powder, 10.000 g of lightly burned magnesia coarse powder, and 2.000 g of hemihydrate gypsum into a vibrating mill for dry grinding to make the particle size of the above-mentioned materials below 20...

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Abstract

The method for preparing potash fertilizer (kaili salt) by using potassium-rich rock through the process of hydrothermal chemical reaction is characterized by that its adopted alkaline raw material can be lime or light-burned magnesia or dolomite lime and gypsum, and said method includes the following steps: coarse-crushing and medium crushing the above-mentioned raw materials to below 3 mm; according to the ratio of that potassium-rich rock; lime or light-burned magnesia or dolomite lime; gypsum is 1:0.8-1:0.2-0.25 feeding the above-mentioned raw materials into vibration grinding machine and grinding them to below 200 meshes, uniformly mixing them, conveying obtained mixture material into storage tank device, adding water, regulating solid-liquid ratio to 1:1-3, stirring and mixing, transferring said material into high-pressure reactor, introducing high-pressure steam, making hydrothermal reaction at 130-250 deg.C constant temperature for 5-24 hr. so as to obtain the invented prdouct.

Description

Technical field [0001] The invention relates to a method for preparing potassium fertilizer (potassium salt) from potassium-rich rocks by using hydrothermal chemical reaction. Background technique [0002] Potassium-rich rock (insoluble potassium ore) refers to a special type of rock mainly composed of authigenic high-potassium silicate minerals. In this type of rock, potassium-containing minerals are mainly potassium feldspar, illite, glauconite, mica minerals, etc. The chemical composition is K 2 The O content is relatively high, generally above 10%. my country contains extremely rich potassium-rich rock resources, which are widely distributed. According to estimates by experts from the geological and mining department, the reserves of potassium-rich rocks in the country are equivalent to K 2 O is about 5 billion tons or more. [0003] my country is a country that lacks soluble potash resources. In order to solve the serious shortage of agricultural potash fertilizers, it is de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/00C01D7/00C05D1/04
Inventor 韩成
Owner ZHONGKE JIANCHENG MINERAL TECH BEIJING
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