Burnt agalmatolite brick and preparation method of burnt agalmatolite brick

Abstract

The invention discloses a burnt agalmatolite brick and a preparation method of the burnt agalmatolite brick. The preparation method comprises the following steps: (1), mixing materials of the brunt agalmatolite brick into a mixture, wherein the materials of the brunt agalmatolite brick are as follows in parts by weight: 100 parts of pyrophyllite raw ores, 1-5 parts of aluminium oxide, 1-5 parts of bentonite, 0-10 parts of clays and 2-4 parts of a binding agent, the average particle size of the alumina is not greater than 10 mu m, and the obtained mixture contains 71%-90% of SiO2 (in percent by weight) and 5%-24% of Al2O3; and (2), carrying out mechanical pressing and forming on the mixture obtained in the step (1) to obtain a semi-finished product, and burning the semi-finished product to obtain the burnt agalmatolite brick. According to the burnt agalmatolite brick and the preparation method of the burnt agalmatolite brick, durability of the finished product is greatly improved by selecting an appropriate sintering aid, improving strength of a semi-finished product and further improving qualified rate of the finished product.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a fired alabaster brick and a preparation method of the fired alabaster brick. Background technique [0002] Alabaster bricks are semi-silicon refractory materials made of alabaster bricks. The main chemical composition of alabaster bricks is Al 2 o 3 10~18%, SiO 2 78-86%, which is mainly used for the permanent layer of ladle, the working layer of ladle, and the working layer of casting ladle. [0003] The patent document with the application publication number CN103288465A discloses a pyrophyllite brick and its preparation method, wherein the ratio of raw materials by weight of the pyrophyllite brick is: 75-85 parts of pyrophyllite raw material, 5-10 parts of pyrophyllite clinker, 4 to 8 parts of clay, 5 to 10 parts of additives, and 1 to 2 parts of binder. The preparation method includes the following steps: (1) Ingredients: mixing pyrophyllite raw meal, wax stone clinker...

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Problems solved by technology

[0005] The permanent layer of traditional high-temperature containers used for ironmaking or steelmaking generally uses fired wax bricks. The fired paraffin bricks in the above two patents and the prior art are all fired with ordinary refractory clay or silicon micropowder. Due to the poor bonding and sintering properties of these two sintering aids, the strength of the semi-finished product after machine pressing is low, and the phenomenon of missing corners and edges is more serious, which reduces the pass rate and strength of the finished product, greatly affecting the firing wax. The durability of stone bricks

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