Medium frequency induction electric furnace furnace bile wet knotting technology application

The knotting of the furnace is an important process in the smelting of the medium frequency induction furnace. Over the years, we have experienced repeated application of the knotting furnace and the purchase of the integral furnace, and the effect is not satisfactory. The use of medium frequency induction furnace furnace wet knotting technology, let us relieve the burden.

Advantage

In 2012, after the introduction of the new technology of medium-frequency induction furnace furnace wet method to our company, through serious and preliminary argumentation, we succeeded in one fell swoop and solved the labor intensity of the furnace that has been plaguing us. It is labor-intensive, time-consuming and knotted. This difficulty is difficult to master, and the furnace that is knotted by this method is also easy to disassemble. The service life is almost the same as that of the dry method. The 1t furnace can ensure the safe melting of 60t metal liquid every time. .

2. Basic methods

At the beginning of the application, we used silica sand as the base material for the binder. The basic ingredients are: silica sand: 2# (8 ~ 10 mesh) 5%, 3 # (10 ~ 26 mesh) 35%, 4 # (16 ~ 24 mesh) 35%, 8 # (250 ~ 400 mesh) 25%; Boric acid: 2.5%; water: 8%. After three dry and three wet rebuilding, the knot is gradually knotted to the furnace mouth by vibration while feeding. Naturally dry 4 ~ 6h (depending on the temperature), pull out the steel mold, and then naturally dry for not less than 2h (depending on the temperature, extended to 8 ~ 10h best). After making the furnace collar, put 6-8 steel pipes in the furnace wall, put a steel pipe in the middle (with the base), and then start the power oven. The oven specification is the same as the dry knotted furnace.

3. Comparison

Compared to dry knotting furnaces, wet knotted furnaces do not dry knots that may exist. Each time the added furnace material is filled evenly under the action of the vibrating rod, the excess water is continuously upward, which ensures that the combination of the newly added furnace material and the furnace material in the furnace is not stratified. Especially afterwards, we used a mixer to mix the charge, and completely abandoned the labor intensity of the furnace. Knotting the stove is not only easy, but also the quality is guaranteed. Nowadays, we use refractory aggregates (a multi-standard furnace material preparation) produced by professional factories to make the knotting of the furnace easier. The only drawback is that the strength is not as high as that of the dry method, but as long as the smelting operation is carried out for its characteristics, the shortage is not a problem.

4. Technical points

Technical points to be aware of when using the wet method to knot the furnace:

(1) The holding of the moisture of the stirring furnace material should be dry and not wet, so as to avoid excessive water overflow during knotting.

(2) The oven should be carried out separately, and the oven should not be taken. The first smelting, especially the initial addition of the charge, should try to make the charge hit the bottom of the furnace and the wall of the furnace. At other times, it is necessary to avoid the use of the furnace wall as a support to move the charge.

(3) Pay special attention to the hang material when adding the charge, so as to avoid the appearance of the material handling operation.

(4) After the furnace gallbladder is partially peeled off, it is painted with water glass, and then the wet furnace material is tightly packed and compacted.

5 Conclusion

A few years of practice has proved that the wet knotting furnace technology is an easy, reliable and safe method of knotting the furnace, which companies can use with confidence.

About the author: Zhou Jianxin, Huo Longjin, Tan Wei, Sichuan Jianmen Pump Industry (provincial) Technology Center.