The melting of enamel frit refers to the melting of batch materials at a high temperature of about 1250°C (industrial acid-resistant enamel frit temperature can reach 1400°C). After a series of physical and chemical reactions, it becomes a enamel melt that meets the quality requirements. The water shocked into an enamel frit.

Here are a few common enamel melting equipment:

1. Crucible furnace

Crucible furnace is an earlier batch furnace, divided into closed crucible (commonly used) and open crucible.

Advantages: suitable for small batch and multi-variety production; molten material is not easy to be polluted; light and volatile raw materials are less loss, and the quality of enamel is good;

Disadvantages: low production capacity, high fuel consumption; discharge and replacement of new dry boilers must be carried out at high temperature, high labor intensity.

2. Pool furnace

The tank furnace is one of the most commonly used equipment for enamel frit melting.

Advantages: large production capacity, high fuel heat utilization rate; simple equipment operation; relatively stable enamel melting quality;

Disadvantages: Only suitable for the production of a single type of enamel. If you want to change the type of enamel, you must clean it thoroughly and gradually transition from shallow to deep, so as not to affect the color and internal quality of the enamel, which is more troublesome.

Three, converter

Advantages: large production capacity, large heating area, easy temperature adjustment, low labor intensity. Because the converter keeps rotating during the melting process, it can continuously stir the batch materials, so the melting effect is good;

Disadvantages: high noise, short service life of furnace lining, lower heat utilization rate than pool furnace.

Four, electric melting furnace

Domestic and foreign enamel and frit enterprises have gradually adopted full-capacitor tank furnaces and electric booster furnaces. The use of all-electric furnaces is the development direction of enamel frit preparation;

advantage:

1. With cold furnace top, the comprehensive heat utilization rate is as high as 75%, and there is no need to set up a waste heat recovery system, which reduces the cost;

2. The all-electric fusion enamel frit tank furnace has high production efficiency, close to 3t (㎡•d); low energy consumption, only 0.9kw;

3. The volatile fluoride only accounts for 2%~4.5% of the total, no pollution;

4. Low maintenance cost;

5. The full electric furnace is automatically controlled, with less labor and automation.