1. Using normal sizing nozzle and well block. The service life for normal sizing nozzle and well block is only 8-10 hours, under this condition, we need to change the nozzle and well block every 8-10 hours, which is very time and energy consuming and affect continuous casting to a certain extent.
2. Using exchangeable nozzle and well block. The service life of upper exchangeable nozzle and well block is 24-30 hours, which gives longer continuous casting time, we only need to change the lower nozzle, of course every coin has two sides, under this condition, a set of exchanging mechanism is needed, the cost will be comparatively higher.
Users can choose either of those two options according to practical needs.
There are some essential differences between graphite carburant and coal quality carburant:
First: The raw material of those two carburant is different. Graphite carburant is made from filtered natural graphite, and coal quality carburant is produced from burning anthracite.
Second: They have different features. Graphite carburant has features of low sulfur, low nitrogen phosphorus, high temperature resistance and good electrical conductivity etc., which are not available for coal quality carburant.
Third: They have different absorptivities. Absorptivity of graphite carburant is more than 90%, and that’s why it can meet the using requirement even its fixed carbon is low (about 75%).
Forth: Graphite carburant and coal quality carburant have quite different prices. Even the price of graphite recarburant is a little higher than that of coal quality carburant, its comprehensive cost is much lower.
Changxing Refractory has all the refractory products mentioned above, if you need any of them, feel free to email us or call us!
The link ：http://www.chinafirebrick.com/Company_News_42.html
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