Firing of ceramic glaze on a steel plate

Steel plate enamel is basically made by two glazing processes: one is spray/dip glaze, and the other is electrostatic dry spray.

1. Firing of steel plate enamel glazed by dipping process

① Preparation of glaze: Weigh the raw materials and water into the enamel grinding ball according to the formula, cover it, and grind it to the appropriate particle size, generally 250 mesh sieve with 0.3%.

②Spraying/dipping glaze and drying: spraying glaze is to spray the glaze with suitable flow velocity and viscosity on the surface of the product with a spray gun. Glazed. Put the glaze-dipped steel plate sample into an electric heating, humidity and blast drying oven for 5 minutes.

③ Firing: Put the dried steel plates into a resistance furnace for firing. Generally, the highest firing temperature is 760-830°C.

2. Firing of enamel steel plate glazed by electrostatic dry spraying process

①Spraying: Take the steel plate to the electrostatic dry spraying room, spray a layer of enamel electrostatic base glaze on the surface of the sample with an electrostatic dry spray gun, and spray a layer of enamel electrostatic top glaze with the electrostatic dry spray gun on the basis of the spray base glaze.

② Firing: The process is the same as the above, but different in controlling the firing temperature and time

Color modulation of steel enamel

Adding a variety of pigments to the transparent or white basic glaze can be mixed to produce almost all the required hue, but each factory needs to make it according to its own firing and actual on-site modulation.

Steel plate enamel pattern realization

Screen printing Firstly, the color glaze of the mesh pattern is prepared, and the screen printing with a pre-made pattern is used.

Inkjet printing requires inkjet printer and special inkjet ink

Impact resistance analysis

1. Analysis of impact resistance of enamel steel plate glazed by dipping process

Under the same firing temperature, the impact resistance of the enamel steel plate will increase as the firing time is prolonged. The impact resistance of the enamel steel plate is improved with the increase of the firing temperature under the same firing time.

2. Impact resistance analysis of enamel steel plate glazing by electrostatic dry spraying:

The impact resistance of the enamel steel plate glazed by electrostatic dry spraying is also the same as the impact resistance of the enamel steel plate glazed by the dipping process. When the firing temperature is the same, it increases with the increase of the firing time; when the firing time is the same , Strengthen with the increase of firing temperature. In order to meet the requirements of industrial processes in terms of impact resistance, electrostatic dry spraying has a lower firing temperature and shorter firing time than glaze immersion. Therefore, it saves energy and reduces consumption in industrial production, and improves efficiency. Therefore, the firing temperature and firing time of enamel steel plates with different processes and glazes are also different.

3. The influence of the thickness of the porcelain layer on the impact resistance of the enamel steel plate:

In addition to the effect of firing temperature and firing time on the impact resistance of enamel steel plates, there is also an index that also affects the impact resistance, that is, the thickness of the porcelain layer. It is found that steel plates with relatively thick ceramic layers have better adhesion and stronger impact resistance than steel plates with relatively thin ceramic layers.

Steel enamel color

Steel plate enamel pattern