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High strength forsterite heat insulating material and preparation method thereof

A technology of forsterite and thermal insulation materials, applied in the direction of magnesium silicate, silicate, etc., can solve the problems of high cost, low degree of industrialization, and performance impact, and achieve high operating temperature, reduce heat pollution, and excellent performance Effect

Inactive Publication Date: 2012-07-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the cost is higher, the degree of industrialization is not high, and its performance is also affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method of a high-strength forsterite-based thermal insulation material, first mixing 20-25wt% of sodium carbonate powder and 75-80wt% of forsterite raw ore powder, and adding 3-7wt% of calcium lignosulfonate to the above mixture As a binder, the binder should be melted into an aqueous solution before being used for batching, stirred for 10-20 minutes, pressed into shape, dried at 60-110°C for 12-24 hours; then dried at 800-900°C for 5-6 hours Burn in the air, cool naturally, soak in water for 24-36 hours, and then dry at 60-110°C for 12-24 hours to obtain a high-strength forsterite insulation material.

Embodiment 2

[0014] A preparation method of a high-strength forsterite-based thermal insulation material is the same as in Example 1 except that the binder is sodium lignosulfonate.

Embodiment 3

[0016] A preparation method of a high-strength forsterite-based thermal insulation material, first mixing 25-30wt% potassium carbonate powder and 70-75wt% forsterite raw ore powder, and adding 7-10wt% industrial dextrin powder of the above mixture Binder, the binder is melted into an aqueous solution before being used for batching, stirred for 15-25 minutes, pressed into shape, dried at 60-110°C for 24-36 hours; then dried at 900-1000°C for 4-5 hours Firing in air, soaking in water for 36-48 hours after natural cooling, and then drying at 60-110°C for 24-36 hours to obtain high-strength forsterite insulation material.

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Abstract

The invention relates to a high-strength forsterite insulating material and a preparation method thereof. The invention adopts a technical proposal that the method comprises the following steps: firstly mixing 20 to 70 percent of carbonate powder and 30 to 80 percent of crude forsterite powder by weight, adding 3 to 10 percent of bonding agent by weight of the mixture into the mixture, stirring the mixture for 5 to 25 minutes, and pressing and molding the mixture; and then drying the mixture for 12 to 36 hours at a temperature of between 60 and 110 DEG C or naturally drying the mixture for 24to 48 hours indoors, sintering the dried mixture for 2 to 6 hours at a temperature of between 800 and 1,400 DEG C in the air, naturally cooling the sintered mixture and soaking the cooled mixture for24 to 48 hours by water, and drying the soaked mixture for 12 to 36 hours at a temperature of between 60 and 110 DEG C or naturally drying the soaked mixture for 24 to 48 hours indoors to obtain the high-strength forsterite insulating material. The preparation method has the characteristics of rich raw material resources, low production cost and easy industrialized production. The high-strength forsterite insulating material prepared by the method not only has good performance, but also has high using temperature and long service life, can be widely applied to industrial thermal equipment, and can save energy and reduce consumption.

Description

technical field [0001] The invention belongs to the technical field of composite refractory and thermal insulation materials. In particular, it relates to a high-strength forsterite thermal insulation material and a preparation method thereof. Background technique [0002] Existing lightweight thermal insulation materials for high-temperature industrial thermal equipment, especially non-ferrous metal and steel smelting, cement and glass production equipment, such as alumina hollow sphere materials, lightweight high-alumina materials, lightweight forsterite thermal insulation materials, Light clay, diatomite materials, etc., have a large heat loss during the production process of these equipment, so the heat pollution to the surrounding environment is also serious, which not only wastes energy, but also affects the production and operation environment and conditions. Therefore, the research and development of new lightweight insulation materials with high strength, low bulk ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/22C04B35/66C04B35/20
Inventor 邓承继祝洪喜张少伟白晨
Owner WUHAN UNIV OF SCI & TECH