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Method for preparing inorganic porous material from magma soil by alkali activation

A technology of inorganic porous materials and magma soil, which is applied in the production of clay products, ceramic materials, ceramic products, etc., can solve the problems of poor heat insulation and sound insulation effects, large capacity, etc., achieve high-strength heat insulation and sound insulation performance, and realize building energy saving , Good heat insulation and sound insulation performance

Inactive Publication Date: 2017-04-26
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make comprehensive use of non-metallic mineral resources and overcome the problems of large volume, poor heat insulation and sound insulation effects in existing mineral polymer materials, the present invention provides a light inorganic porous material utilizing natural non-metallic mineral magmatic soil and its preparation method

Method used

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  • Method for preparing inorganic porous material from magma soil by alkali activation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The magma soil is used as the main raw material, and sodium hydroxide is used as the alkali activator. Weigh respectively: 200g of magma soil after removing impurities, and 100g of sodium hydroxide solution (4M).

[0031] The magmatic soil is crushed to pass through a 200 mesh sieve.

[0032] Put the above two raw materials into a kneader for thorough mixing.

[0033] The kneaded mixture is placed in a mold for compression molding, and the pressure is 5 MPa.

[0034] Put the molded sample belt mold in an oven and dry it at 115°C for 1 hour. After cooling, the sample is hardened and released from the mold.

[0035] The demolded samples were placed in a muffle furnace, treated at 350°C for 1 hour, and cooled down to room temperature naturally.

[0036] The bulk density of the sample prepared above is 1412 kg / m 3 , the compressive strength is 10.5 MPa, and the average pore diameter is 0.6~0.82mm.

Embodiment 2

[0038] The magma soil is used as the main raw material, and sodium hydroxide is used as the alkali activator. Weigh respectively: 200g of magma soil after removing impurities, and 100g of sodium hydroxide solution (4M).

[0039] The magmatic soil is crushed to pass through a 230 mesh sieve.

[0040] Put the above two raw materials into a kneader for thorough mixing.

[0041] The kneaded mixture is placed in a mold for compression molding, and the pressure is 5 MPa.

[0042] Put the molded sample belt mold in an oven and dry it at 105°C for 1 hour. After cooling, the sample is hardened and released from the mold.

[0043] The demolded samples were placed in a muffle furnace, treated at 500 °C for 1 hour, and cooled down to room temperature naturally.

[0044] The bulk density of the sample prepared above is 712 kg / m 3 , the compressive strength is 7.52 MPa, and the average pore diameter is 0.8~1.2mm.

Embodiment 3

[0046] The magma soil is used as the main raw material, and sodium hydroxide is used as the alkali activator. Weigh respectively: 200g of magma soil after removing impurities, 100g of sodium hydroxide solution (8M).

[0047] The magma soil is crushed to pass through a 270 mesh sieve.

[0048] Put the above two raw materials into a kneader for thorough mixing.

[0049] The kneaded mixture is placed in a mold for compression molding, and the pressure is 5 MPa.

[0050] Put the molded sample belt mold in an oven and dry it at 110°C for 1 hour. After cooling, the sample is hardened and released from the mold.

[0051] The demolded samples were placed in a muffle furnace, treated at 500 °C for 1 hour, and cooled down to room temperature naturally.

[0052] The bulk density of the sample prepared above is 612 kg / m 3 , the compressive strength is 4.7 MPa, and the average pore diameter is 3.6~4.5mm.

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Abstract

The invention discloses a method for preparing a light inorganic porous material from magma soil as a raw material by alkali activation. The inorganic porous material is prepared from raw materials in percentage by mass as follows: 75%-95% of the magma soil and 5%-25% of an alkali activator. The method has the outstanding characteristics and remarkable improvement that rich natural non-metallic mine waste is used effectively, and the defect that a common inorganic mineral polymer is high in volume weight and does not have thermal insulation and sound insulation functions is overcome effectively. The process is reasonable in design, the raw materials are richly sourced, the technological process is simple, and the light inorganic porous material is prepared through comprehensive utilization of mineral resources and can be widely applied to the fields of thermal insulation, fire prevention, sound insulation and the like.

Description

technical field [0001] The invention belongs to the field of inorganic macromolecular materials and new building materials, and in particular relates to a low-density honeycomb material and a preparation method thereof, which are activated by alkali and then roasted with magma soil as raw material. Background technique [0002] Porous materials are widely used in many industrial fields due to their low density, high specific surface area, low thermal conductivity, and sound-absorbing and thermal-insulating properties. In recent years, the use of natural mineral materials to prepare cheap porous inorganic materials has become a focus of attention in this field. Among them, introducing pores into alkali-activated aluminosilicate mineral materials is one of the simpler and easier methods. Such inorganic polymer materials have excellent chemical and thermal stability, and can be completed only at room temperature or moderate temperature. The inorganic material obtained by desil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/13C04B33/132
CPCC04B33/131C04B33/132C04B38/0025C04B2235/77C04B2235/96C04B38/0051C04B38/0067Y02P40/60
Inventor 井强山
Owner XINYANG NORMAL UNIVERSITY
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