CO2 mineralization method capable of co-producing potassium-enriched solution by high temperature method

A potassium-rich, solution technology, applied in the directions of potassium fertilizer, inorganic fertilizer, calcium carbonate/strontium/barium, etc., can solve the problems of low conversion rate of mineralization reaction, and achieve the improvement of mineralization efficiency, conversion rate and utilization rate. Effect

Inactive Publication Date: 2012-10-03
SICHUAN UNIV
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Problems solved by technology

[0006] CO for the co-production of potassium-rich solutions for prior art 2 The problem of low conversion rate of mineralization reaction, the present invention aims to provide a high conversion rate of potassium feldspar mineralization CO 2 Simultaneous co-production of potassium-enriched solutions to achieve CO 2 Efficient storage of potassium feldspar and efficient utilization of potassium feldspar

Method used

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  • CO2 mineralization method capable of co-producing potassium-enriched solution by high temperature method

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Effect test

Embodiment 1

[0026] The mined potassium feldspar is crushed and ball milled to make the particle size less than 200 mesh. Put 2.5g of potassium feldspar powder and 2.5g of calcium chloride powder into a porcelain boat and mix well, put the porcelain boat into a tubular reaction furnace, heat up to 800°C, react for 60 minutes, and take it out when it cools naturally to 80°C Porcelain boat, take out the material after the conversion reaction, add 75ml of water, put it in the reaction kettle, raise the temperature to 150°C, and pass in CO 2 The gas pressure was increased to 4MPa, the stirring rate was 250r / min, and the stirring was stopped after 120min of reaction. After the reaction kettle is cooled to about 80°C, the pressure is released to normal pressure to open the reaction kettle, and the feed liquid after the mineralization reaction is filtered to obtain CaCO 3 The solid phase, the liquid phase is a potassium-rich solution rich in potassium ions. The conversion rate of the potassium ...

Embodiment 2

[0028] The mined potassium feldspar is crushed and ball milled to make the particle size smaller than 325 mesh. Put 2.5g of potassium feldspar and 5g of calcium chloride powder into the porcelain boat and mix them evenly. Put the porcelain boat into the tube reactor and heat up to 950°C. After reacting for 30 minutes, take out the porcelain boat when it cools naturally to 80°C. The reacted material was taken out, added 75ml of water, placed in the reaction kettle, heated to 150°C, and CO 2 The gas pressure was increased to 4MPa, the stirring rate was 250r / min, and the stirring was stopped after 120min of reaction. After the reaction kettle is cooled to about 80°C, the pressure is released to normal pressure to open the reaction kettle, and the feed liquid after the mineralization reaction is filtered to obtain CaCO 3 The solid phase, the liquid phase is a potassium-rich solution rich in potassium ions. The conversion rate of potassium feldspar component in the present embodi...

Embodiment 3

[0030] The mined potassium feldspar is crushed and ball milled to make the particle size smaller than 325 mesh. Put 2.5g of potassium feldspar and 1g of calcium chloride powder into the porcelain boat and mix them evenly, put the porcelain boat into the tubular reaction furnace and raise the temperature to 600°C, after reacting for 60 minutes, take out the porcelain boat when it cools naturally to 80°C, and convert the The reacted material was taken out, added 25ml of pure water, placed in the reaction kettle, heated to 100°C, and CO 2 The pressure rises to 2MPa. The stirring rate was 250r / min, and the stirring was stopped after 120 minutes of reaction. After the reaction kettle is cooled to about 80°C, the pressure is released to normal pressure to open the reaction kettle, and the feed liquid after the mineralization reaction is filtered to obtain CaCO 3 The solid phase, the liquid phase is a potassium-rich solution rich in potassium ions. The conversion rate of potassium...

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Abstract

The invention discloses a CO2 mineralization method capable of co-producing potassium-enriched solution by a high temperature method, which mainly comprises the following steps of: adequately and evenly mixing smashed potash feldspar-enriched ore power and calcium chloride, and carrying out conversion reaction under the condition that the temperature is not lower than 600 DEG C; putting material which is adequately converted into a reactor, adding water, charging CO2, and carrying out mineralization reaction under the condition that the CO2 partial pressure is 0.3-15MPa, and the temperature is 50-350 DEG C; and charging material liquid which is adequately mineralized into separation equipment to separate the solid from the liquid, wherein the liquid phase is the potassium ion-enriched potassium-enriched solution, and the solid phase is the calcium carbonate-containing mineralized product. The CO2 is mineralized by the technical method disclosed by the invention, and the conversion rate of the potash feldspar component in the ore reaches 96%, so that compared with the highest conversion rate 13% of the existing CO2 mineralization method capable of co-producing the potassium-enriched solution, the conversion rate of the CO2 mineralization method is improved by over 6.3 times.

Description

technical field [0001] The present invention relates to a CO 2 Mineralization treatment method for emission reduction, especially involving a method in mineralizing CO 2 Gas simultaneous production of soluble potassium salts. Background technique [0002] In recent years, global warming has increasingly seriously affected the earth's ecological environment and global climate, including vegetation migration and species extinction, climate zone movement, sea level rise and land inundation, ocean current changes and El Niño frequency, etc. This is mainly caused by CO 2 caused by the warming effect of greenhouse gases. According to the third assessment report of the United Nations Intergovernmental Panel on Climate Change (IPCC), the global average surface temperature has increased by 0.6°C in the 20th century, and the sea level has risen by 0.1-0.2m. With an increase of 1.4-5.8°C in 1990, the sea level will rise by 0.09-0.88m. This will pose a serious threat to low-lying ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C05D1/04
Inventor 谢和平王昱飞刘建锋刘涛
Owner SICHUAN UNIV
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