Phosphoric acid and spinel combined high aluminia pouring material

A high-aluminum castable and castable technology, which is applied in the field of refractory materials, can solve the problems of reduced refractoriness, low strength, pouring construction, demoulding, baking and other technical difficulties of castables.
CN1418852AInactive Publication Date: 2003-05-21UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2003-05-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention belongs to the field of refractory material, specially, it is suitable for producing phosphoric acid combined high-aluminium pouring material. It is characterized by that it uses electrocast spinel as coagulation accelerator or phosphoric acid combined pouring material, its main raw material is a high-grade high-alumina, and its secondary raw material is electrocast magnesia-alumina spinel and phosphoric acid. Said inention is easy to construct and easy to remove form, and has higher strength, after the form of removed for 3 days, it is water resistant.
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Description

Technical field:

[0001] The invention belongs to the field of refractory materials, and is particularly suitable for producing phosphoric acid-bonded high-alumina castables. Background technique:

[0002] At present, the main coagulants of phosphoric acid-bonded high-alumina castables in China are high-alumina cement and MgO fine powder. Using high-alumina cement as a coagulant, due to the introduction of a certain amount of CaO, the refractoriness and other properties of the castable will be reduced. When MgO fine powder is used as coagulant, it can chemically react with phosphoric acid to make the refractory castable coagulate and harden at room temperature. Baking and other processes bring difficulties, and studies have shown that if MgO is used as a coagulant, its strength after hardening is very low. Invention content:

[0003] The purpose of the present invention is to find a material to replace high-alumina cement or MgO fine powder as a coagulant, so that it can ...

Claims

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