What is the ratio of the coated sand to the graphite powder? How to improve the refractoriness of precoated sand
In addition to improve the refractoriness with graphite, can also add red. It also plays a role in increasing refractoriness and reducing gas output.
Or change the sand species, change the high refractoriness sand species, this cost is relatively large.
General additives accounted for 0.1-0.5 of the original sand weight. Different demand, of course, the proportion is not the same, there is no fixed number.
