High-purity magnesite brick for ultrahigh-temperature shaft kiln with temperature greater than or equal to 2100 DEG C and manufacturing method of high-purity magnesite brick

Abstract

The invention relates to a high-purity magnesite brick for an ultrahigh-temperature shaft kiln with a temperature larger than or equal to 2100 DEG C and a manufacturing method of the high-purity magnesite brick. The high-purity magnesite brick is prepared from magnesite A, magnesite B, magnesite C, magnesite D and paper pulp waste liquid. The manufacturing method of the high-purity magnesite brick comprises the steps of mixing, forming, drying and sintering. The raw material magnesite of the high-purity magnesite brick is prepared by crushing and screening large-crystal magnesite obtained by electrically melting high-purity cryptocrystalline magnesite produced in Kamaduo Village, Leiwuqi County, Tibetan, and an impurity content is extremely low; then multi-stage grain composition is adopted for batching, a large-tonnage press is adopted for green brick forming, and sintering is performed in a tunnel kiln at a high temperature of greater than or equal to 1810 DEG C; and thus, refractoriness under load and sinterability are improved, the strength of the product is improved, and the sintered magnesite brick can meet the requirement of an ultrahigh-temperature sintering shaft kiln of more than or equal to 2100 DEG C.

Description

technical field

[0001] The invention relates to a high-purity magnesia brick for an ultra-high temperature shaft kiln with a temperature greater than or equal to 2100°C and a manufacturing method thereof. Background technique

[0002] A shaft kiln is a device for continuous sintering of mineral raw materials. The specific structure is a metal vertical outer cylinder with refractory material layering inside, and a combustion heating device in the middle. Minerals that need to be heated and sintered enter from the upper part and gradually fall down. It is heated and sintered during this process and is discharged from the bottom of the shaft kiln.

[0003] For the refractory lining material in the shaft kiln, different refractory materials are selected according to the sintering temperature and the materials to be sintered.

[0004] Magnesium-containing solid minerals that can be used to produce magnesia refractories, magnesia chemical raw materials, and magnesium metals mai...

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