In day-to-day steel plant language, 'slag pot' and 'slag ladle' refer to the same component: the cast steel vessel that receives molten slag. Regional habits differ — North American plants tend to say pot, while ladle is common in Europe and in translated specifications.
Where a distinction is drawn
Some engineers reserve 'ladle' for vessels that pour from a spout (like a steel ladle) and 'pot' for vessels that dump by tilting. Since slag vessels overwhelmingly dump rather than pour, 'pot' is arguably more precise — but no standard enforces this, and EN/ASTM material standards apply identically to both.
What to put in your RFQ
Skip the terminology debate and specify what matters: capacity (m³), maximum slag temperature, carrier interface (trunnion diameter, spacing, tilting lugs), steel grade and standard, NDT scope, and documentation requirements. A drawing beats a thousand words — send STEP or PDF and any capable foundry will quote accurately.