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A kind of synthetic dead burnt magnesia and preparation method thereof

A technology of dead burnt magnesia and finished products, which is applied in the field of refractory materials, can solve the problems of high temperature resistance and corrosion resistance defects of dead burnt magnesia, improve technical performance and use effect, and improve high temperature resistance and erosion resistance , the effect of improving the technical level

Active Publication Date: 2021-08-03
辽宁利尔镁质合成材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the CaO / SiO in the dead-burned magnesia prepared by the existing production process 2 The molar ratio of magnesia is usually about 1 (between 0.5 and 2.0), and the innate chemical composition determines that the cementing phase is usually low-melting calcium magnesium olivine and magnesia rhodoxene, so the high temperature resistance of the above-mentioned dead burned magnesia and corrosion resistance have great defects

Method used

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  • A kind of synthetic dead burnt magnesia and preparation method thereof
  • A kind of synthetic dead burnt magnesia and preparation method thereof
  • A kind of synthetic dead burnt magnesia and preparation method thereof

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preparation example Construction

[0033] A preparation method for synthesizing dead-burned magnesia as claimed in claim 1, comprising the steps of:

[0034] 3) Raw material processing;

[0035] Crushing natural magnesite ore in a crusher to make block raw materials with 25mm<grain size≤100mm; crushing quartz sand in a crusher to make block raw materials with 0mm<grain size≤25mm;

[0036] 4) Ingredients;

[0037] Synthesis of CaO / SiO in Dead Burnt Magnesia 2 The molar ratio of is calculated according to the following formula:

[0038]

[0039] Wherein: X-magnesite ore adds mass percentage;

[0040] 1-X-quartz sand is added in mass percentage;

[0041] W(CaO) I -CaO weight percent in magnesite;

[0042] W(SiO 2 ) I - SiO in magnesite ore 2 % by weight;

[0043] W(CaO) II -CaO weight percent in the quartz sand;

[0044] W(SiO 2 ) II -SiO in quartz sand 2 % by weight;

[0045] 3) mixing and homogenization;

[0046] Mix and homogenize the processed natural magnesite ore and quartz sand raw mater...

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Abstract

The invention relates to a synthetic dead-burned magnesia, which is formed by sintering the following raw materials according to the weight ratio: 92-98 parts of natural magnesite ore with a particle size of 25mm<100mm, 2-8 parts of quartz sand with a particle size of 0mm<25mm parts; the molar ratio of CaO / SiO2 in the finished product is <0.5. The preparation method of the described synthetic dead burnt magnesia comprises 1) processing of raw materials; 2) batching; 3) mixing and homogenizing; 4) feeding cloth; The method of sintering after adding quartz sand into the stone, so that the CaO / SiO in the synthesized dead-burned magnesia 2 The molar ratio of the refractory is controlled below 0.5, and its cementing phase is forsterite with a high melting point, thereby improving the high temperature resistance and erosion resistance of the refractory.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a synthetic dead-burned magnesia with forsterite as a binding phase and a preparation method thereof. Background technique [0002] Dead-burned magnesia is an important raw material for making ordinary magnesia bricks and unshaped refractory materials. At present, dead-burned magnesia is usually sintered with natural magnesite in a fuel shaft kiln. However, the CaO / SiO in the dead-burned magnesia prepared by the existing production process 2 The molar ratio of magnesia is usually about 1 (between 0.5 and 2.0), and the innate chemical composition determines that the cementing phase is usually low-melting calcium magnesium olivine and magnesia rhodoxene, so the high temperature resistance of the above-mentioned dead burned magnesia And corrosion resistance has great defects. Contents of the invention [0003] The invention provides a synthetic dead-burned magnesia ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/043C04B35/622
CPCC04B35/043C04B35/622C04B2235/3208C04B2235/3418
Inventor 张义先董会彬陈东明王新杰金钊尹斌王健骁
Owner 辽宁利尔镁质合成材料股份有限公司