Selection method of electric furnace wire for high temperature frit furnace

High-temperature frit furnace is mainly used for high-temperature fusion of block and powder materials to obtain a variety of new formulas and new materials, and prepare samples for subsequent performance tests of new materials. It is used for experiments and production of frit glaze, glass solvent, enamel glaze binder for ceramics, glass, enamel abrasives and pigments and other enterprises and scientific research units. The operating temperature is also divided into various temperature ranges. Among them, the electric furnace wire is an important part of the road. Today, we will talk to you about its selection method.

1. Look at the operating temperature of the electric furnace wire

The upper limit of the usable temperature of the electric furnace wire is a main performance index in the selection process of the high-temperature frit furnace. It is necessary to remind everyone that the use temperature of the electric furnace wire refers to the temperature of the surface of the element body during the operation of the electric furnace wire, not the electric heating The operating temperature that the equipment or heated object can reach.

In the design and selection of electric furnace wire, the following heating temperature can be measured according to the box-type electric furnace or heating object used. For example, when the electric furnace wire is used for boiler heating, the difference between the furnace temperature and the use temperature of the electric furnace wire is about 100 ℃ , If the heating temperature of the electric furnace wire exceeds the temperature that it can withstand, the oxidation process will be accelerated, the heat resistance will be reduced, and the service life will be shortened. Therefore, the higher the operating temperature that the electric furnace wire can withstand, the higher the temperature Both operation and use are beneficial.

2. Look at the diameter and thickness of the electric furnace wire

The service life of the electric furnace wire of a high-temperature frit furnace is largely related to the diameter and thickness of the electric furnace wire. The diameter and thickness of the electric furnace wire are parameters related to the temperature that the electric furnace wire can withstand. The larger the diameter of the electric furnace wire, The easier it is to overcome the problem of deformation at high temperatures and prolong its service life. When the electric furnace wire runs at extremely high operating temperatures, it should keep the diameter not less than 3mm and the thickness of the flat belt not less than 2mm.

When the electric furnace wire is used in a high-temperature environment, a protective oxide film will form on the surface, and the oxide film will age after a period of time, forming a cyclic process of continuous generation and destruction. This process is the process of continuous consumption of elements in the electric furnace wire. Electric furnace wires with larger diameters and thicknesses have more elements and have a longer service life.

3. Look at the working atmosphere of the electric furnace wire

High temperature frit furnace electric furnace wire itself has certain corrosion resistance, but in a high temperature environment, the corrosion resistance of the electric furnace wire will be reduced. At the same time, the electric furnace wire can work in a corrosive atmosphere of the electric furnace. The reached operating temperature will also be affected, so when choosing an electric furnace wire, it is necessary to consider its working atmosphere, such as carbon atmosphere, sulfur atmosphere, hydrogen, nitrogen atmosphere, etc.

The electric furnace wire of the frit furnace has anti-maintenance treatment during the production process. However, due to various reasons such as transportation and installation, the electric furnace wire may be more or less damaged before use. At this time, the electric furnace wire can be pre-oxidized. , The installation of electric furnace wire equipment is energized in dry air until the upper limit temperature can be reached and the operating temperature is lowered between 100 ℃ and 200 ℃, and the temperature is maintained for 5 to 10 hours and then slowly cooled.