Success Story

Optimising performance and installation for the steel ladle lip ring

Steelmaking - Secondary metallurgy

The Calderys cast-in-situ and precast QD (Quick Dry) solutions installed at our German customer’s plant allowed them to optimise the performance of their steel ladles with a focus on the lip ring zone.

The destruction of the ladle lip zone during the production process or during the cleaning of the top ladle ring with an excavator machine creates a risk of disassembling the slag line (made of MgO-C bricks) so there is a clear need to avoid safety incidents.

It is important to find a solution for optimising performance with a material allowing a good compromise between thermal shock, corrosion, and mechanical resistance, while also allowing for a heating-up of the ladle that does not need to be slowed during preheating.

Calderys has developed a new generation of CALDE® CAST QD (Quick Dry) materials, which do not contain cement and allow to significantly reduce preheating by reducing dry-out and heating-up time by 50% vs. standard cement-containing materials.

The key benefits which convinced our existing customers in Germany to choose QD refractory materials:

  • Ease of installation
  • Fast heating-up rate
  • Good general performance

CALDE® CAST NA 55 QD (andalusite based) and CALDE® CAST NB 82 QD (bauxite based) are particularly well-adapted for the lip ring zone for standard processing.

In case of heavy corrosion like with a vacuum tank degasser, CALDE® CAST NT 92 QD (tabular alumina based) is recommended.

Top stresses successfully confronted at the steel ladle lip:

  • Splashing during tapping of steel from the converter and consequent deposits of steel scrap
  • Corrosion from slag during the secondary metallurgy process
  • High thermo-mechanical stresses from the thermal expansion of the refractory wall
  • High mechanical stress during cleaning with a machine

For more details, please contact our Steel experts!

Latest news

Das Team von Caldery China freut sich auf Ihren Besuch auf unserem Stand Nr.

Calderys nimmt an der Maintenance 2017 in Antwerpen, Belgien, teil.

訪問我們的凱得力美國展位,探討煉油和石化產品耐火材料。

4月23-24日與凱得力團隊相約第10屆圣彼得堡國際PetroCem會議:展位 #7。

Meet our Foundry team at IFEX 2020 and discover our refractory range of specially formulated products and services for the Foundry industry.