Enamel firing furnace is the key equipment of the enamel industry, its basic type according to the use of fuel is divided into gas furnace and electric furnace, according to the shape of the furnace it can be box, linear, U-shaped, etc.
The firing form of enamel products are mainly two kinds: intermittent and continuous, the former is suitable for small production, with more varieties, or products with larger size and longer firing time, while the latter is suitable for large production, with relatively single type. 

First, intermittent enamel firing furnace
For intermittent firing furnace, the semi-finished product is transport to the firing chamber by manual or mechanical, and after firing, the product is also took out of the furnace by manual or mechanical. Intermittent furnaces are mostly box type, also U-shaped but not very common.

1. Small box intermittent furnace
The general box-type intermittent furnace is a square or rectangular furnace body with a door in front, with forks to feed the product, according to the weight of the product, and is divided into hand-held, wheeled and rail type.

2. Large box intermittent firing furnace
With small production, and larger size, such as enamel reactor, enamel water storage tank, etc. large intermittent box-type furnace can be used. The advantage is that the construction costs are low and the power used is small. The products can be sent directly into the firing chamber by using the mechanical device installed on the rail, and then unload by the mechanical device after the firing is completed.

Second, continuous enamel firing furnace
With large production and high thermal efficiency, continuous enamel firing furnace is the common used enamel firing equipment. The shape of this type of firing furnace varies, and the product size varies greatly, but all are composed of three areas of preheating, firing and cooling, the length of each area depends on the production of enamel products, type, process requirements. 

1. U-shaped continuous firing furnace
Compared with other furnace types, the U-shaped continuous firing furnace has a small heat dissipation area per unit space. The products entering the furnace and the finished products leaving the furnace to exchange heat in the exchange belt with high thermal efficiency. 

2. Roller conveyor furnace
Roller conveyor furnace’s structure similar to the early use of mesh belt plane transmission kiln, firing chamber is the tunnel type, in the location of the furnace bed arranged in many by the chain driven rotation of high alumina porcelain roller drive chain sprockets on both sides of the outside of the furnace, by gears, sprockets drive. The enamel products are placed directly on the high alumina porcelain rollers, or the roller conveyor carries the frame with the enamel products for firing.

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