Erosion-resistant acid-resistant crack-resistant zero-expansion silicon brick and preparation method thereof

Abstract

The invention discloses an erosion-resistant acid-resistant crack-resistant zero-expansion silicon brick and a preparation method thereof. The preparation method comprises the following steps of: S1,selecting raw materials: selecting 80-90% of fused quartz, 10-20% of silicon powder, 0.1-3% of carboxymethyl cellulose and 1-5% of silica sol; S2, mixing raw materials, namely mixing the selected rawmaterials, adding SiO2, Al2O3, Fe2O3 and CaO into a stirrer to stir and mix after mixing, and obtaining a mixture after trapping materials; S3, pressing and forming: putting the mixture into a press machine, and pressing and forming by one-way pressure to prepare a cylindrical sample; S4, drying: naturally drying the prepared cylindrical sample at room temperature, placing the cylindrical sample in a drying box to heat, and drying to obtain a dried sample; S5, sintering, namely putting the dried sample into a calcining furnace to heat, preserving heat and calcining to obtain a thermal shock resistant silicon brick. Compared with other preparation methods, the method has the advantages of low technical cost, mature process, easy realization and strong practicability, and greatly improves the using quality of the silicon brick.

Description

technical field [0001] The invention relates to the technical field of silica brick preparation, and more specifically relates to an erosion-resistant, acid-resistant, crack-resistant, zero-expansion silica brick and a preparation method thereof. Background technique [0002] At present, the large silicon bricks used in glass ultra-white line photovoltaic lines and glass furnaces are prone to expansion, cracking, and even bursting under high temperature conditions of 1500 ° C. Once they burst, their fragments will easily fall into the glass furnace. Usually, the composition of the chip is different from that of the product produced in the kiln. The purity and quality of the product will be affected if the chip is mixed with impurities. Therefore, we propose a corrosion-resistant, acid-resistant, crack-resistant, and zero-expansion silica brick and its preparation method. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in...

AI Technical Summary

Problems solved by technology

[0002] At present, the large silicon bricks used in glass ultra-white line photovoltaic lines and glass furnaces are prone to expansion, cracking, and even bursting under high temperature conditions of 1500 ° C. Once they burst, their fragments will easily fall into the glass furnace. Usually the composition of the modified fragments is different from that of the products produced in the kiln, and the purity and quality of the products will be affected if the impurities of the fragments are mixed. Therefore, we propose a kind of anti-erosion, acid-resistant, crack-resistant, and zero-expansion silica bricks and its preparation method