When foundries keep reporting “more porosity and inclusions in recent lots”, many Russian smelters first adjust alloy recipes or process parameters. But often the real root cause is simpler: hydrogen content and inclusion level in the original ingot are too unstable.

If you are considering a 9 m ingot casting machine with in-line degassing and a filtration box, there are at least three things to examine:

1. Casting speed and ingot specification coverage
   Can the 9 m caster handle your current and planned ingot lengths, widths and weights? At higher speeds, is there real data showing stable cooling and dimensional consistency?

2. Degassing unit performance
   Are there test results for residual hydrogen at different flow rates and alloys? Rotor design and maintenance intervals have a direct impact on long-term effectiveness.

3. Filtration level and serviceability of the filtration box
   Which grades of ceramic filters can it take? How long must the line stop for filter changes? If each change is painful, high-frequency maintenance will not be sustainable.

Only after you clarify these points can you judge whether the “9 m ingot casting + in-line degassing + filtration” line will actually hold hydrogen and inclusions within a tighter band, instead of just adding more equipment to an old flow. Vendors that supply a full integrated ingot casting solution, such as Wuxi Wondery Industry Equipment, usually design flow path and parameter control as an integrated system — a key factor for long-term quality stability.

Once purification and casting truly form a continuous process, porosity and inclusion defects in secondary casting naturally drop, and you gain much stronger data support when discussing internal quality with your customers.