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Method for preparing high-strength burnt magnesium chrysolite light material through foam method

A technology for sintering forsterite and lightweight materials, applied in the field of refractory thermal insulation materials, can solve the problems of high cost, low degree of industrialization, use impact, etc., and achieve the effects of low cost, reduction of heat pollution, and reduction of heat loss

Active Publication Date: 2013-09-04
湖北红花高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the contradiction between the high strength and high porosity of the material, it is difficult to obtain the forsterite light material with high strength and good thermal insulation performance in the current method of producing forsterite light material; at the same time, it does not directly use the abundant forsterite mineral in our country resource
Therefore, the cost is higher, the degree of industrialization is not high, and its use is also affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for preparing high-strength burned forsterite light material by foam method, first mix 62kg of forsterite raw ore powder, 23kg of lightly burned magnesia powder and 10kg of magnesium chloride hexahydrate, add 17kg of water, and stir evenly Finally, add 20L of foaming agent for cement, continue to stir for 5-10 minutes, and cast directly into the mold; after 24 hours of natural curing, demoulding, and then dry at 80°C for 24 hours, at 1350°C Calcined under the same conditions for 2.5 hours, and after natural cooling, a high-strength fired forsterite lightweight material was obtained, with a compressive strength of 13MPa and a bulk density of 1.5g / cm 3 . The lightweight material can be used in heating furnaces, boilers, annealing furnaces or heat treatment furnaces with a temperature below 1200°C.

Embodiment 2

[0016] A method for preparing high-strength fired forsterite light material by foam method, except that the foaming agent is plant protein biological protein or plant protein is hydrolyzed in sodium dodecylbenzene sulfonate to obtain foaming agent, the rest are the same Example 1. The prepared high-strength fired forsterite light material has a compressive strength of 12.5MPa and a bulk density of 1.4g / cm 3 . The lightweight material can be used in heating furnaces, boilers, annealing furnaces or heat treatment furnaces with a temperature below 1100°C.

Embodiment 3

[0018] A method for preparing high-strength burned forsterite light material by foam method, first mix 68kg of forsterite raw ore powder, 15kg of lightly burned magnesia powder and 12kg of magnesium chloride hexahydrate, add 15kg of water, and stir evenly Finally, add 33L of foaming agent, continue to stir for 5-10 minutes, and cast directly into the mold; after 24 hours of natural curing, demoulding, and then dry at 100°C for 30 hours, at 1300°C Burn in the air for 3 hours, and after natural cooling, a high-strength fired forsterite lightweight material is produced, with a compressive strength of 11MPa and a bulk density of 1.0g / cm 3 . The lightweight material can be used in an annealing furnace or a heat treatment furnace with a temperature below 1000°C.

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Abstract

The invention relates to a method for preparing a high-strength burnt magnesium chrysolite light material through a foam method. The preparation method comprises the following steps: mixing magnesium chrysolite raw ore powder, light calcined magnesia powder and magnesium chloride hexahydrate, uniformly stirring in water, adding a foaming agent, fully stirring, and molding by casting in a mold; naturally curing and demolding within 24 hours, drying at the temperature of 60-110 DEG C for 12-36 hours, calcining at the temperature of 1,200-1,400 DEG C for 2-6 hours, and naturally cooling to prepare the high-strength burnt magnesium chrysolite light material. The burnt magnesium chrysolite light material has the volume density of 0.6-1.5g / cm<3> and is excellent in performance, high in service temperature, long in service life and suitable for various industrial thermal equipment at the temperature of 1200 DEG C or below.

Description

technical field [0001] The invention belongs to the technical field of refractory and thermal insulation materials. In particular, it relates to a method for preparing a high-strength fired forsterite light material by a foam method. Background technique [0002] Modern industrial production of thermal power plants, nuclear power plants and steel plants, as well as industrial kiln walls of petroleum, chemical, building materials and other factories, generally accounts for about 5-30% of the total heat loss of the kiln. The waste heat emitted by heat dissipation to the atmosphere is equivalent to more than 100 million tons of standard coal, which not only consumes a lot of energy, but also is one of the main culprits causing the urban heat island effect. The main prevention and control method for thermal pollution caused by such heat dissipation is to strengthen thermal insulation and heat insulation measures, and use good thermal insulation materials. [0003] Existing lig...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B38/10C04B35/622
Inventor 邓承继祝洪喜汪盛明易成雄张小东
Owner 湖北红花高温材料股份有限公司
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