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Low sintering temperature magnesia zircon brick

A low sintering temperature, magnesia-zirconium brick technology, applied in the field of low sintering temperature magnesia-zirconium bricks, can solve the problems of high temperature resistance and low corrosion resistance, affect the normal operation of the glass kiln, and short service life of the product, so as to achieve extended service life, Improvement of high temperature flexural performance and improvement of thermal shock resistance

Inactive Publication Date: 2015-07-08
浙江立鑫高温耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The refractory bricks used in the existing glass kiln regenerator grid body generally have the problems of low high temperature resistance and corrosion resistance, and short service life of the product, resulting in frequent replacement of refractory bricks in the glass kiln regenerator grid body. Affect the normal operation of the glass kiln; and in the manufacturing process of refractory bricks, the sintering temperature is generally above 1700 ° C, and the energy consumption is relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The low sintering temperature magnesia-zirconium brick is characterized in that it includes the following raw materials: fused magnesia, zircon sand, activated alumina, yttrium oxide, calcium lignosulfonate, oxalic acid, graphite powder, and the oxidized magnesia in the fused magnesia The mass fraction of magnesium is ≥ 99%, the mass fraction of zirconia in the zircon sand is ≥ 77%, the fineness of the fused magnesia is below 0.1mm, and the fineness of the zircon sand is below 0.08mm, The mass ratio of the fused magnesia, zircon sand, activated alumina, yttrium oxide, calcium lignosulfonate, oxalic acid, and graphite powder is 8:2:1.5:0.8:1:1:0.5; the low sintering The preparation process of temperature magnesia-zirconium bricks includes the following steps: 1) First, mix fused magnesia, activated alumina, and yttrium oxide in a sand mixer for 5-8 minutes, then add zircon sand, calcium lignosulfonate , oxalic acid, and graphite powder were mixed for 18-20 minutes to obt...

Embodiment 2

[0019] The difference from Example 1 is that the mass ratio of fused magnesia, zircon sand, activated alumina, yttrium oxide, calcium lignosulfonate, oxalic acid, and graphite powder is 12:4:2.5:1:2: 1.5:1.

Embodiment 3

[0021] The difference from Example 1 is that the mass ratio of fused magnesia, zircon sand, activated alumina, yttrium oxide, calcium lignosulfonate, oxalic acid, and graphite powder is 10:3:2:1:1- 2:1.5:0.8.

[0022] The invention uses high-quality high-purity fused magnesia and synthetic magnesia-zircon sand as raw materials, and is sintered and formed by specific high pressure, temperature and process, and has a microstructure whose main mineral phases are periclase, forsterite and baddeleyite. The mineral phase is a very stable mineral phase with strong corrosion resistance. In this microstructure, two mineral phases, forsterite and baddeleyite, cover and fill the surface of magnesium oxide to form a stable protective layer. The two phases The adjacent periclase grains are separated by forsterite and baddeleyite, which makes the brick body have good permeability resistance; due to the closed small pores and zirconia grains in the periclase crystals, the periclase is wrappe...

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Abstract

The invention provides a low sintering temperature magnesia zircon brick which comprises the following raw materials: fused magnesite, zircon sand, activated alumina, yttrium oxide, calcium lignosulphonate, oxalic acid and graphite powder, wherein the mass fraction of the magnesium oxide in the fused magnesite is equal or greater than 99 percent, the mass fraction of the zirconia in the zircon sand is equal or greater than 77 percent, the fineness of the fused magnesite is lower than 0.1 mm, the fineness of the zircon sand is lower than 0.08 mm, and the mass ratio of the fused magnesite, the zircon sand, the activated alumina, the yttrium oxide, the calcium lignosulphonate, the oxalic acid and the graphite powder is 8-12 to 2-4 to 1.5-2.5 to 0.8-1 to 1-2 to 1-1.5 to 0.5-1. The high-temperature resisting and erosion resisting capability of the product is stronger, the service life of the product is longer, and under the premise of ensuring product quality, the sintering temperature is lowered, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a low sintering temperature magnesia-zirconium brick. Background technique [0002] The refractory bricks used in the existing glass kiln regenerator grid body generally have the problems of low high temperature resistance and corrosion resistance, and short service life of the product, resulting in frequent replacement of refractory bricks in the glass kiln regenerator grid body. It affects the normal operation of the glass kiln; and in the manufacturing process of refractory bricks, the sintering temperature is generally above 1700 ° C, and the energy consumption is relatively large. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low sintering temperature magnesia-zirconium brick, the product has strong high temperature resistance and corrosion resistance, and the product has a long service life. Energy consumption. [0004] In order to solve the above-mentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 高寿林
Owner 浙江立鑫高温耐火材料有限公司
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