What Affects Free Opening
Nozzle Filling Compound performance depends on ladle practice, bore size, holding time, steel temperature, tapping conditions, and the material's particle size distribution. If the filler sinters too strongly or does not flow correctly into the nozzle well, the plant may face delayed opening, lancing, or inconsistent casting starts.
For a meaningful recommendation, PK INDUSTRIES asks for the current free opening percentage, lancing frequency, nozzle bore, heat size, holding time, and steel grade family. These inputs help decide whether the plant needs a change in blend chemistry, PSD, flowability, or usage practice.
How To Evaluate A Trial
During trial use, the most important observation is whether the ladle opens cleanly and consistently at the start of casting. Teams should record free opening result, lancing requirement, opening delay, operator remarks, and whether any residual material causes flow disturbance.
A successful NFC trial should improve opening reliability without creating handling or storage issues. The material should remain free-flowing, non-caking, and easy for the operator to charge into the nozzle area using the plant's normal practice.