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Calcium silicate fireproofing board and preparation method thereof

A technology of fireproof board and calcium silicate, applied in the field of fireproof board, can solve the problems that the consumption of calcium silicate products is difficult to meet the requirements of industrial solid waste resource utilization, the annual production volume of industrial solid waste is large, etc., and the thermal conductivity of high temperature can be achieved. The effect of reducing, reducing thermal shrinkage, reducing thermal conductivity

Active Publication Date: 2018-05-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the annual production of industrial solid waste is huge, and the consumption of a single type of calcium silicate product is difficult to meet the requirements for resource utilization of industrial solid waste

Method used

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  • Calcium silicate fireproofing board and preparation method thereof
  • Calcium silicate fireproofing board and preparation method thereof
  • Calcium silicate fireproofing board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A calcium silicate fireproof board comprises the following raw materials in parts by weight:

[0070]

[0071] The calcium-silicon ratio of the raw material is 0.15.

[0072] A preparation method for a calcium silicate fireproof board, comprising the steps of:

[0073] (1) Causticizing the fly ash and quicklime with 0.1 times its mass at 50°C for 7 hours, separating the slurry from solid and liquid to obtain a solid phase; performing the first leaching of the solid phase to obtain the first filter cake; The first filter cake is mixed with water to form a suspension, then mixed with the sodium removing agent, and the solid and liquid are separated to obtain the second solid phase; the second solid phase is subjected to the second rinsing to obtain the second filter cake, and the second filter cake is dried Obtain a hydrated calcium silicate product with a sodium oxide content of less than 0.95% by weight;

[0074] The sodium-removing agent is a mixture of aluminum o...

Embodiment 2

[0078] A calcium silicate fireproof board comprises the following raw materials in parts by weight:

[0079]

[0080] The calcium-silicon ratio of the raw material is 3.

[0081] A preparation method for a calcium silicate fireproof board, comprising the steps of:

[0082] (1) Causticize the fly ash desiliconization solution and milk of lime of 1 times its mass at 30°C for 10 hours, separate the slurry from solid to liquid to obtain a solid phase; perform the first leaching of the solid phase to obtain a first filter cake ; The first filter cake is mixed with water to form a suspension and then mixed with a sodium-removing agent for solid-liquid separation to obtain a second solid phase; the second solid phase is subjected to second rinsing to obtain a second filter cake, and the second filtration After the cake is dried, a hydrated calcium silicate product with a sodium oxide content of less than 0.35 wt% is obtained;

[0083] The sodium-removing agent is a mixture of al...

Embodiment 3

[0087] A calcium silicate fireproof board comprises the following raw materials in parts by weight:

[0088]

[0089] The calcium-silicon ratio of the raw material is 0.5.

[0090] A preparation method for a calcium silicate fireproof board, comprising the steps of:

[0091] (1) Calcium silicate slag and milk of lime three times its mass are causticized at 100° C. for 6 hours, and the slurry is separated from solid and liquid to obtain a solid phase; the solid phase is subjected to first rinsing to obtain a first filter cake; The first filter cake is mixed with water to form a suspension, then mixed with the sodium removing agent, and the solid and liquid are separated to obtain the second solid phase; the second solid phase is subjected to the second rinsing to obtain the second filter cake, and the second filter cake is dried A hydrated calcium silicate product with a sodium oxide content of less than 0.51 wt% is obtained;

[0092] The mass ratio of the sodium-removing ...

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Abstract

The invention provides a calcium silicate fireproofing board and a preparation method thereof. The calcium silicate fireproofing board is prepared from the following raw materials in parts by weight:0.1 to 80 parts of hydrate calcium silicate, 10 to 70 parts of quartz, 0 to 20 parts of cement, 0 to 20 parts of wood pulp fiber and 10 to 70 parts of lime, wherein the ratio of calcium to silicon is0.1 to 5. The preparation method of the calcium silicate fireproofing board comprises the steps of pulping, flow slurry technological molding, steaming curing and drying. The calcium silicate fireproofing board has the advantages that the hydrate calcium silicate is successfully applied to the fireproofing board, the high-temperature thermal conductivity of the calcium silicate fireproofing boardis smaller than 0.2W / (M*K) and the heat shrinkage rate is smaller than 0.3 percent; the problem that a solid waste-based silicon-containing material is difficult to use is solved; the preparation method has the advantages of simplicity, mild conditions, low cost and easiness in industrialized application.

Description

technical field [0001] The invention belongs to the technical field of fireproof boards, and relates to a calcium silicate fireproof board and a preparation method thereof, in particular to a calcium silicate fireproof board prepared by recycling solid waste and a preparation method thereof. Background technique [0002] With the development of the national economy and the scarcity of high-quality resources, the resource utilization of low-grade mineral resources and industrial solid waste has received extensive attention. Current research mainly focuses on the extraction of valuable elements from the above-mentioned solid waste and low-grade minerals, and a large amount of associated silicon resources will exist in the form of waste liquid and waste residue, which is difficult to effectively use, resulting in environmental pollution and waste of resources. Therefore, the resource utilization of solid waste-based silicon elements needs to be solved urgently, and it is an eco...

Claims

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Application Information

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IPC IPC(8): C04B28/12C04B111/28
CPCC04B28/12C04B2111/28C04B2201/32C04B7/02C04B14/06C04B18/26C04B7/00
Inventor 朱干宇李会泉李少鹏王兴瑞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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