High-strength fireproof crucible and production method thereof

Abstract

The invention relates-the field of refractory materials, and discloses a high-strength fireproof crucible and a production method thereof. The crucible is produced from a mud material and additives; the mud material comprises 55-65 parts of magnesium ores, 5-15 parts of zirconia, 5-15 parts of fused magnesia, 5-15 parts of waste graphite micro-powder, 1-5 parts of metallic magnesium micro-powder,1-5 parts of chromium oxide micro-powder, 0.3-0.5 part of resorcinol diglycidyl ether, 0.1-0.3 part of sodium dodecyl benzene sulfonate, 20-30 parts of ethanol and 10-20 parts of water; and the additives include 0.05-0.1 part of a cationic photocuring initiator, 0.05-0.2 part of tetradecyltrimethylammonium bromide, 3-7 parts of ethanol and 3-7 parts of water. The reduction of the use amount of theadditives effectively increases the strength of the crucible. A crucible blank is pre-cured through a photocuring technology before being sintered in order to effectively prevent the cracking of thecrucible.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a high-strength refractory crucible and a preparation method thereof. Background technique [0002] Magnesium carbon crucible is made of high melting point basic oxide magnesium oxide (melting point 2800 ℃) and high melting point carbon material which is difficult to be infiltrated by slag as raw materials, and various non-oxide additives are added. A composite refractory material combined with carbonaceous additives. As a composite refractory material, magnesia-carbon crucible effectively utilizes the strong slag erosion resistance of magnesia and the high thermal conductivity and low expansion of carbon to compensate for the biggest shortcoming of magnesia's poor spalling resistance. Its main features are: 1. Good high temperature resistance; 2. Strong slag resistance; 3. Good thermal shock resistance; 4. Low high temperature creep, so magnesium carbon crucible is the best ...

AI Technical Summary

Problems solved by technology

The chemical properties of the crucible prepared by this method are stable, the bonding surface of the crucible blank is large during sintering, the porosity is low, and the mechanical strength, thermophysical properties, chemical erosion resistance of metal melt and refractoriness are all improved, but the cost is high. The requirements for equipment are high, and the object of use is too specific

Chinese patent CN101318812B discloses a method for preparing a high-alumina high-temperature-resistant crucible, using raw materials such as bauxite clinker, Suzhou soil, silicon carbide, cooked talc, zircon, etc., which has good chemical stability and excellent thermophysical properties , long service life, but high process precision, high requirements for equipment, and difficult to obtain raw materials

[0005] But in the raw material of the refractory crucible of the above-mentioned patent, the addition amount (about 2% in the embodiment) that plays a bonding effect is more, even if this additive has high temperature resistance, it still partly decomposes under high temperature environment, thereby in refractory Pores are left inside the crucible, resulting in a reduction in the strength of the refractory crucible

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