What are the advantages of using hot air kiln in glass melting furnace?

After the completion of the refractory materials of the glass melting furnace, what are the advantages of using hot air kiln baking?

After the refractory bricks are built, the glass melting furnace needs to be baked to ensure that the lining of the kiln is timely discharged of moisture to achieve the expected high-temperature performance. There are two ways to bake the kiln, namely traditional kiln baking and hot air kiln baking. Among them, hot air kiln baking is a new kiln baking technology in recent years. It requires a short construction period, can shorten the construction period of maintenance or new kiln construction, save economic costs, and has been well promoted and used.

Hot air kiln baking is also called fast kiln baking. It is a kiln baking method that uses a special jet burner to generate a high-speed airflow with controllable temperature. This method was developed in the 1960s and has been widely promoted and applied in the 1970s. China began to use hot air kiln baking in the early 1980s. Different from the traditional kiln baking method, the hot air kiln uses the flue gas generated by the full combustion of gas in the combustion chamber of the hot air kiln to mix with a large amount of excess air, and the combustion products formed are sprayed into the melting furnace at a high speed (maximum speed of 300m/s), so that all parts of the kiln are evenly heated by the combustion products under a slight positive pressure, so the kiln baking speed can be accelerated. Using this method and the rapid feeding method can shorten the time from ignition to production by 7 to 10 days. The comparison between the hot air kiln and the traditional method is shown in Table 1.

Compared with the traditional kiln baking method, the hot air kiln has the following advantages.

① Short kiln baking time.

② Save fuel costs.

③ Effectively prevent local overheating of the kiln body.

④ Convenient temperature adjustment, which is convenient for accurate temperature control during the entire kiln baking period.

⑤ The refractory materials in various parts of the kiln body can expand synchronously.

⑥ Because it is a positive pressure kiln, it can avoid temperature fluctuations and brick cracking caused by cold air inhalation.

⑦ The process of over-firing is relatively simple and will not cause temperature fluctuations.

⑧The checker bricks in the heat storage chamber are not easy to collapse. If the traditional kiln method is used, when the upper temperature of the heat storage chamber reaches 800℃, the lower temperature reaches more than 1200℃, which is easy to cause the lower checker bricks to soften.

⑨The hot air kiln equipment can be reused.