Eco-Friendly Dry Vibratable Mix for Tundish Working Linings

Dry vibratable mix has become the standard tundish working lining for a simple reason: it removes steps. No water, no mixing, no curing, quick heat-up, and clean deskulling at the end of the sequence. On a plant running multi-heat sequences, those savings are usually worth more than a marginal gain in campaign length.

Where the Value Actually Comes From

• Turnaround — no mixing and no curing removes a full step from every tundish cycle.
• Deskulling — the lining releases cleanly from the permanent layer, which shortens deskulling and reduces the mechanical damage that aggressive skull removal does to the permanent lining. That damage is a hidden cost of coatings that deskull poorly.
• Steel cleanliness — SiO₂ held to 3.0% limits CaO-SiO₂ pickup into the steel. On cleanliness-sensitive grades this is a direct quality benefit, not a refractory statistic.
• Thermal retention — lower thermal conductivity than a dense lining helps hold steel temperature through the sequence.

Chemistry: Magnesia With Lime

XZK-Eco-Magnesia runs MgO ≥60% with CaO ≥30% and SiO₂ ≤3%. The magnesia provides refractoriness and resistance to tundish flux, while the lime contributes flux tolerance and helps the lining release cleanly at deskulling. The low silica is deliberate: silica would drive inclusion pickup and undermine steel quality.

Strength Development and Heat-Up

Strength is low in the green state and develops with temperature — modulus of rupture rises from 2.0 MPa at 150 °C to 5.5 MPa at 1500 °C, and crushing strength from 5.0 to 8.0 MPa. That is normal for a dry mix and is why the heat-up curve matters: the lining gains its working strength as it comes up to temperature. We supply the curve with every order.

Supply

Minimum order 5 metric tons, shipped in 7–14 days, with particle grading adjusted for your vibration equipment and tundish geometry. Batch test data covering chemistry, density, strength at multiple temperatures and permanent linear change ships with every lot, along with a written installation and heat-up procedure.

Where This Grade Sits in the Lining System

Monolithic materials fail more often on installation than on specification. Water demand, mixing time, vibration and the first heat-up curve decide the outcome before the lining ever sees metal — which is why installation parameters are issued with the material instead of being left to site practice.

XZK supplies tundish dry vibratable mix as one zone of a zoned package rather than as a standalone item: the grades normally zoned alongside it — among them monobloc stopper rod — are documented on the monolithic refractories page, and the vessel-level architecture — where each zone starts and ends, and which mechanism actually limits the campaign — is set out on the tundish flow control page.

The Colakoglu Metalurji slab caster flow control programme reference documents how this class of material performed in full service, with the measured campaign figures rather than datasheet values.