https://pkindustries.net/blog.html Practical technical articles on casting powder, nozzle filling compound, refractory castable, mortar and ladle covering compound. en-in Tue, 11 Aug 2026 05:39:42 +0000 https://pkindustries.net/blog/why-ladle-does-not-open-freely.html https://pkindustries.net/blog/why-ladle-does-not-open-freely.html Free opening rate is one of the cleanest indicators of ladle practice health. Here are the four causes behind most failures, and the order to check them in. Mon, 10 Aug 2026 09:00:00 +0530