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Calcium-magnesium-silicon functional material with hierarchical pore distribution as well as preparation method and application of calcium-magnesium-silicon functional material

A functional material, calcium magnesium silicon technology, applied in calcareous fertilizers, chemical instruments and methods, applications, etc., can solve the problems of air, water, soil pollution, backwardness, etc., to achieve rich surface charge, wide source of raw materials, and production costs. low effect

Inactive Publication Date: 2021-07-16
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The massive accumulation of silicon-rich solid waste such as fly ash, microsilica fume, and coal gangue not only occupies a large amount of land resources, but also causes serious pollution to air, water, and soil.
The traditional way to deal with the above-mentioned solid waste is to use landfill, but it cannot fundamentally solve the pollution caused by it to the environment
In recent years, the above solid wastes have been used in construction and building materials, but due to the relatively backward technology used, this treatment method belongs to extensive utilization

Method used

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  • Calcium-magnesium-silicon functional material with hierarchical pore distribution as well as preparation method and application of calcium-magnesium-silicon functional material
  • Calcium-magnesium-silicon functional material with hierarchical pore distribution as well as preparation method and application of calcium-magnesium-silicon functional material
  • Calcium-magnesium-silicon functional material with hierarchical pore distribution as well as preparation method and application of calcium-magnesium-silicon functional material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: A kind of preparation method of calcium magnesium silicon functional material with hierarchical pore distribution, comprises the following steps:

[0029] (1) Preparation of NaO xSiO by alkali dissolution reaction 2 Solution: Mix silicon-rich solid waste, sodium hydroxide, and water for an alkali-dissolving reaction to obtain NaO xSiO 2 solution;

[0030] In this example, the alkali dissolution reaction temperature is 110°C, and the reaction time is 4h; the silicon-rich solid waste is fly ash; the SiO in the silicon-rich solid waste 2 The content is 40wt%; the mass ratio of silicon-rich solid waste to sodium hydroxide is 1:1; the mass ratio of total solids to water is 1:8.

[0031] (2) Preparation of xCaO·yMgO·zSiO by hydrothermal reaction 2 Suspension: in NaO xSiO 2 Lime suspension and MgO suspension are added to the solution to mix, and a hydrothermal reaction occurs to obtain xCaO·yMgO·zSiO 2 suspension;

[0032] In this embodiment, the hydrotherm...

Embodiment 2

[0038] Embodiment 2: A kind of preparation method of calcium magnesium silicon functional material with hierarchical pore distribution, comprises the following steps:

[0039] (1) Preparation of NaO xSiO by alkali dissolution reaction 2 Solution: Mix silicon-rich solid waste, sodium hydroxide, and water for an alkali-dissolving reaction to obtain NaO xSiO 2 solution;

[0040] In this example, the alkali dissolution reaction temperature is 90°C, and the reaction time is 6h; the silicon-rich solid waste is coal gangue and diatomaceous earth; the SiO in the silicon-rich solid waste 2 The content is 35wt%; the mass ratio of silicon-rich solid waste to sodium hydroxide is 1:0.5; the mass ratio of total solids to water is 1:5.

[0041] (2) Preparation of xCaO·yMgO·zSiO by hydrothermal reaction 2 Suspension: in NaO xSiO 2 Lime suspension and MgO suspension are added to the solution to mix, and a hydrothermal reaction occurs to obtain xCaO·yMgO·zSiO 2 suspension;

[0042] In this ...

Embodiment 3

[0048] Embodiment 3: A kind of preparation method of calcium magnesium silicon functional material with hierarchical pore distribution, comprises the following steps:

[0049] (1) Preparation of NaO xSiO by alkali dissolution reaction 2 Solution: Mix silicon-rich solid waste, sodium hydroxide, and water for an alkali-dissolving reaction to obtain NaO xSiO 2 solution;

[0050] In this example, the alkali-dissolving reaction temperature is 120°C, and the reaction time is 3 hours; the silicon-rich solid waste is a combination of fly ash, microsilica fume and coal gangue; the silicon-rich solid waste contains SiO 2 The content is 69wt%; the mass ratio of silicon-rich solid waste to sodium hydroxide is 1:1.5; the mass ratio of total solids to water is 1:10.

[0051] (2) Preparation of xCaO·yMgO·zSiO by hydrothermal reaction 2 Suspension: in NaO xSiO 2 Lime suspension and MgO suspension are added to the solution to mix, and a hydrothermal reaction occurs to obtain xCaO·yMgO·zSiO...

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Abstract

The invention discloses a calcium-magnesium-silicon functional material with hierarchical pore distribution as well as a preparation method and application of the calcium-magnesium-silicon functional material. The preparation method comprises the steps of (1) preparing a NaO.xSiO2 solution through alkali dissolution reaction; (2) carrying out a hydrothermal reaction to prepare an xCaO.yMgO.zSiO2 suspension liquid; and (3) carrying out suction filtration, washing and drying to obtain a calcium-magnesium-silicon functional material. The invention also discloses a calcium-magnesium-silicon functional material with hierarchical pore distribution prepared by the method, and application of the material as a citric acid-soluble calcium-magnesium-silicon fertilizer and application of the material as an adsorption material. The calcium-magnesium-silicon functional material with the hierarchical pore distribution has the hierarchical pore distribution; and the material has the advantages of abundant and developed pores, large specific surface area, abundant surface charges and high cation exchange capacity and adsorption capacity.

Description

Technical field: [0001] The present invention relates to a calcium magnesium silicon functional material and its preparation method and application, in particular to a calcium magnesium silicon functional material with multi-level pore distribution and its preparation method and application. Background technique: [0002] A large number of silicon-rich solid wastes are produced in the process of industrial production. For example, fly ash is the solid residue left after coal combustion in coal-fired boilers. It mainly comes from by-products of coal-fired power plants. Every ton of coal burned will 230kg of fly ash is produced; microsilica fume is also called silica fume or agglomerated silica fume, which is a large amount of highly volatile SiO produced in the submerged electric furnace when ferroalloy is smelting ferrosilicon and industrial silicon (metal silicon). 2 And Si gas, which is rapidly oxidized and condensed with air after the gas is discharged. It is a by-product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C05D3/04B01J20/04B01J20/10B01J20/28B09B3/00
CPCC01B33/20C05D3/04B01J20/103B01J20/041B01J20/28061B01J20/28073B09B3/00B01J2220/4875C01P2004/03C01P2004/04C01P2002/72C01P2006/17C01P2006/12C01P2006/14
Inventor 王晓燕张永锋包亚莉王红张印民梁浩东
Owner INNER MONGOLIA UNIV OF TECH
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