Conventional thermal repairing method for refractory materials of glass melting furnace.

The conventional thermal-repair methods of glass melting furnace mainly include the following points.

(1) thermal repair of wall tiles.

After the wall of the pool is built up by the casting of 41# AZS bricks, it can meet the requirements of the use cycle of the melting furnace, and the thermal repair is very small. The two methods for the wall brick of hot repair pool may be used as follows.

The cooling water pipe method. Select 20 ~ 50 mm diameter seamless steel tube, the eroded his wall dip kiln ^ the inside liquid level under 50 ~ 80 mm, make the glass near the liquid solidification, the water temperature maintained at about 50 ℃. Although the effect is significant, it increases heat consumption, water consumption and can only be used on the wall of the pool, which is difficult to be effective when most of the brick is eroded.

It is an iron brick method. When the wall tiles are eroded to only 30mm thick, a piece of homogeneous brick (also known as tie brick) can be attached to a piece of 150mm S. The external brick can be used as old brick, and must be preheated to about 80. The contact surface between brick and brick should be as smooth as possible, the brick seam should be small.

(2) thermal repair of the checker brick in the regenerator.

Because of the use of alkali resistance strong magnesium-chrome brick, magnesia brick, high quality high purity zirconium corundum brick, the regenerator can be used in a kiln period. At present, the main problem of regenerative chamber is the blockage of the lattice after the powder is melted into the tumor. The main content of thermal repair in the regenerative chamber is to keep the lattice unimpeded. The method of cleaning the nodules of regenerator is mainly using mechanical cleaning method, flame melting and clearing method (anti-incineration method).

(3) hot repair of nozzle brick.

The nozzle brick is a kind of special-shaped brick used in the fuel melting furnace. It is the channel that the spray gun shoots through the atomized heavy oil into the kiln and mixed with the combustion air. The nozzle brick is in the nozzle position, direct contact with the flame, easy to be burned: when the nozzle brick nozzle is burned into a gap, should be replaced. Replacement method is relatively simple, namely first'll take out the gun and open the nozzle brick above the small gap between, remove the old nozzle brick, the preheating (baked) placed in a small stove or according to the usage of brick material to be heated to 900 ℃ or more new nozzle brick, in the original position, the gap between yan, loaded gun, and restore its action, hot fix is complete.

The traditional method of thermal repair is harsh, the labor intensity is large, and the advanced refractories have been reduced, but it is still a hard and heavy work, which interferes with normal production. At present, thermal repair and thermal oxygen spraying can improve the condition of thermal repair, and it is more safe for personnel and equipment and is being promoted and adopted.

It is suitable for reinforcing the refractory materials in the late stage of melting furnace, or plugging holes, etc., which may be contaminated with glass.

The problems of normal operation of melting furnace are discussed. The hot oxygen spraying method is a method to repair the refractory material by injecting a similar refractory powder into the refractory material at high temperature. Hot oxygen method can rapidly all Ann to vulcanizing of refractory materials, not only for the average erosion and wear of refractory material, but also for shift or occasionally broken refractory, even to such as caulking or blocking with the traditional method of vulcanizing to great effect on all the parts, this method helps to improve the efficiency of furnace work.