Application of hot repair technology of hanging zero-expansion silica bricks

Application of hot repair technology of hanging zero-expansion silica bricks

A domestic glass production enterprise has large fire holes on the top of the first and second lines, the top of the heat storage chamber, and the upper part of the partition wall after pouring. After repeated demonstrations, in early 2010, the previous water bag sealing process began to be changed.

For smaller fire holes, hot patching materials can be used directly to block them, and high-temperature resistant fiber cloth is prepared in advance to prevent refractory materials from falling into the kiln and contaminating the glass liquid.

This method is simple and fast, and the sealing work can be completed well before the fiber cloth melts.The treatment of larger fire holes is more complicated. Before the hot repair begins, the surface of the kiln must be inspected and cleaned. After the original top bricks are exposed, the openings are trimmed to prevent the lower gap from being filled with bricks due to the large melting area of the lower part and the small opening of the upper part. After hanging zero-expansion bricks on the top, the surrounding area is sealed with hot patching materials. Zero-expansion silica bricks are used instead of heat-resistant steel plates. This repair process is simple to operate. The zero-expansion silica bricks are completely combined with the original silica bricks and micro-expansion hot patch materials at high temperatures. More than a year after the hot repair, the repaired parts are in good condition.

Practice has proved that the hanging zero-expansion silica brick hot repair technology uses zero-expansion silica bricks as the main refractory material, and uses micro-expansion hot patch materials to seal. It can repair the fire holes without stopping the kiln, which saves time and effort. It is an ideal kiln maintenance solution. For more than a year, the application of this technology has ensured the safety of the kiln, effectively extended the service life of the melting furnace, and reduced fuel consumption.