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 limited raw material range and high cost, and achieve the effects of low energy consumption, reduced production cost, and convenient operation.

Inactive Publication Date: 2007-04-04
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

[0045] (1) Select raw materials, including:

[0046] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows: SiO 2 TiO 2 al 2 O Fe2O 3 +FeO MnO 2 CaO MgO K 2 O Na 2 OP 2 O loss on ignition Total

[0047] 3 560.78 0.75 17.07 4.98 0.02 0.15 0.39 13.48 0.22 0.06 1.96 99.86

[0048] X-ray powder crystal diffraction analysis indicates that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

[0049] Dolomite lime: containing 53.23% CaO, 36.27% MgO, and 8.07% loss on ignition, taken from the Babaoshan Limestone Mine in Huailai County, Hebei Province.

[0050] Hemihydrate gypsum: purchased from the market.

[0051] (2) Put 5.000g of potassium-rich rock coarse powder, 5.000g of lime coarse powder, and 1.000g of hemihydrate gypsum into a vibrating grinder to fully grind them so that the particle size of the above materials reaches below 200 mes...

Embodiment 2

[0059] (1) Select raw materials, including:

[0060] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows: SiO 2 TiO 2 al 2 O Fe 2 o 3 +FeO MnO 2 CaO MgO K 2 O Na 2 OP 2 O loss on ignition Total

[0061]3 560.78 0.75 17.07 4.98 0.02 0.15 0.39 13.48 0.22 0.06 1.96 99.86

[0062] X-ray powder crystal diffraction analysis indicates that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

[0063] Lime: CaO content 97%, purchased from the market.

[0064] Hemihydrate gypsum: purchased from the market.

[0065] (2) Put 5.000g of potassium-rich rock coarse powder, 5.000g of lime coarse powder, and 1.000g of hemihydrate gypsum into a vibrating grinder to fully grind them so that the particle size of the above materials reaches below 200 mesh, mix them evenly, and add them to a plastic container 16.5ml of water, then transfer the material to a plastic con...

Embodiment 3

[0073] (1) Select raw materials, including:

[0074] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows: SiO 2 TiO 2 al 2 O Fe 2 o 3 +FeO MnO 2 CaO MgO K 2 O Na 2 OP 2 O loss on ignition Total

[0075] 3 560.78 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 indicates that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.

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

[0078] Hemihydrate gypsum: purchased from the market.

[0079] (2) Put 10.000g of potassium-rich rock coarse powder, 10.000g of lightly burned magnesia coarse powder, and 2.000g of hemihydrate gypsum into a vibrating grinder for dry grinding, so that ...

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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 or potassium salt from potassium-rich rock 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, the potassium-containing minerals are mainly potassium feldspar, illite, glauconite, mica minerals, etc., and the chemical composition is K 2 O content is relatively high, generally above 10%. my country has extremely rich potassium-rich rock resources, which are widely distributed. According to the estimates of experts from the geological and mining department, the national potassium-rich rock reserves are equivalent to K 2 O is about 5 billion tons or more. [0003] my country is a country that lacks soluble potassium salt resources. In order to solve the serious shortage of agricultural potassium fertili...

Claims

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Application Information

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