Preparation method for heat-insulating type compact silicon brick

A silica brick and dense technology, applied in the field of refractory materials, can solve the problems of poor heat insulation effect and large volume of silica brick, and achieve the effect of promoting space gap, improving reactivity and increasing heat resistance

Inactive Publication Date: 2018-01-12
陈合华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the defects of large volume and poor heat insulation effect of the current silica bricks, a method for preparing heat-insulating dense silica bricks is provided

Method used

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  • Preparation method for heat-insulating type compact silicon brick

Examples

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example 1

[0025] According to the mass ratio of 2:1, mix and grind basalt and dolomite for 1 hour, pass through a 50-mesh sieve, collect the sieved powder, put the sifted powder into a muffle furnace at 1500 ° C for 1 hour, and then pour it into a porous drain plate The self-made rock wool fiber was obtained by medium drawing for 30 minutes, and 8 g of phenolic resin, 30 mL of ammonia water with a concentration of 8 mol / L and 15 mL of deionized water were mixed and stirred for 10 min to obtain a self-made rock wool binder, which was mixed in a mass ratio of 2:1:1. After mixing and stirring the self-made rock wool binder, rapeseed oil and polysiloxane for 8 minutes, it becomes the self-made mixture. Spray a layer of self-made mixture with a thickness of 0.5mm on the surface of the above-mentioned self-made rock wool fiber. After collecting by machine for 1 hour, discharge the material and dry naturally to obtain self-made rock wool. Mix ethyl orthosilicate, hydrochloric acid with a concen...

example 2

[0027]According to the mass ratio of 2:1, mix and grind basalt and dolomite for 1.5 hours, pass through a 50-mesh sieve, collect the sieved powder, put the sieved powder into a muffle furnace at 1600 ° C for 1.5 hours, and then pour it into the porous Draw wire in the bushing for 40 minutes to obtain self-made rock wool fiber. Mix and stir 9g of phenolic resin, 40mL of ammonia water with a concentration of 8mol / L and 17mL of deionized water for 11min to obtain self-made rock wool binder. The mass ratio is 2:1: 1 After mixing and stirring the self-made rock wool binder, rapeseed oil and polysiloxane for 9 minutes, it is the self-made mixture. Spray a layer of self-made mixture with a thickness of 0.6mm on the surface of the above-mentioned self-made rock wool fiber. After spraying, pass After the cotton collector collects for 1.5 hours, the material is discharged and dried naturally to obtain self-made rock wool. The volume ratio is 3:1:2:1, and tetraethyl orthosilicate, hydroch...

example 3

[0029] According to the mass ratio of 2:1, mix and grind basalt and dolomite for 2 hours, pass through a 50-mesh sieve, collect the sieved powder, put the sifted powder into a muffle furnace at 1700 ° C for 2 hours, and then pour it into a porous drain plate The self-made rock wool fiber was obtained by medium drawing for 50 minutes, and 10 g of phenolic resin, 50 mL of ammonia water with a concentration of 8 mol / L and 20 mL of deionized water were mixed and stirred for 12 minutes to obtain a self-made rock wool binder, and the mass ratio was 2:1:1. After mixing and stirring the self-made rock wool binder, rapeseed oil and polysiloxane for 10 minutes, it becomes the self-made mixture. Spray a layer of self-made mixture with a thickness of 0.7mm on the surface of the above-mentioned self-made rock wool fiber. After collecting by the machine for 2 hours, discharge the material and dry naturally to obtain self-made rock wool. Mix ethyl orthosilicate, hydrochloric acid with a conce...

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Abstract

The invention relates to the technical field of a refractory material and specifically relates to a preparation method for a heat-insulating type compact silicon brick. The quartz is modified with peach gum under the effect of microorganisms and the macromolecular monosaccharide decomposed from the peach gum is grafted onto the rock wool surface, so that the adhesiveness of the quartz and the rockwool is promoted; the mineralizing agents, including silicon nitride, ferroferric oxide, calcium oxide and aluminum oxide, are added, so that the transformation of the quartz can be accelerated, thesintering temperature is reduced, the sintering time is shortened, the silicon brick interior is effectively filled, a heat-insulating effect is achieved and the compactness and the heat insulation ofthe silicon brick are promoted; the ethyl orthosilicate, hydrochloric acid, absolute ethyl alcohol and deionized water are mixed and reacted for generating a self-prepared silica sol; a silane coupling agent KH-560 is used for modifying the self-prepared silica sol, so that the silicon dioxide is effectively filled into the silicon brick, the surface property and the reaction activity can be effectively improved, the porosity of the silicon brick can be reduced, the compactness and the heat insulation of the silicon brick can be further promoted and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a method for preparing heat-insulating dense silica bricks. Background technique [0002] Silica brick is an acidic refractory material with a wide range of applications and has a history of more than 100 years. It has good resistance to acid slag erosion, and its softening temperature under load is as high as 1640-1670°C, and its volume is relatively stable under high temperature for long-term use. An acidic refractory material mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases. [0003] Silica bricks are mainly used for the partition wall of the carbonization chamber and combustion chamber of the coke oven, the regenerator and sedimentation chamber of the steelmaking open hearth furnace, the soaking furnace, the refractory material of the glass melting furnace, and the vault of the ceramic firing kiln. and other load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/14C04B35/622C04B41/85C04B26/12C03B37/00
Inventor 陈合华杨立军张淑娴
Owner 陈合华
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