High Temperature Resistant Solution for Steelmaking Slag Pot

In the modern steel production process, the treatment of steelmaking slag is a key link. During the steelmaking process, molten steel and slag are produced in a high temperature environment, and the slag temperature can be as high as 1500℃ or above, which puts extremely high temperature resistance requirements on the equipment. As an important equipment for carrying and transporting steelmaking slag, the steelmaking slag pot must have strong high temperature resistance to ensure safe operation and long-term stable operation of the equipment.

Four pain points of high temperature failure of slag pot

  ● Insufficient melting point of materials: Ordinary steel is easy to soften and deform under continuous high temperature.

  ● Thermal stress cracking: Sudden temperature change causes the tank body to crack (such as cooling after slag connection).

  ● Slag layer adhesion: The slag is bonded to the tank wall, making slag removal difficult and accelerating corrosion.

  ● Refractory layer peeling: The expansion coefficient of the lining material and the steel shell does not match, causing shedding.

High temperature resistant solution: full-link optimization from design to operation and maintenance

Material upgrade: high temperature resistant alloy and composite structure

  ● High chromium cast steel (Cr28~32%): temperature resistance up to 1650℃, slag erosion resistance increased by 50%.

  ● Composite structure design: The outer layer uses a high-strength steel shell to ensure mechanical properties; the inner lining is a corundum-silicon carbide refractory castable (Al₂O₃≥85%), which can withstand a temperature of 1800℃.

Structural optimization: Reduce thermal stress damage

  ● Gradient wall thickness design: The bottom of the tank is thickened to 120mm (conventional 80mm) to resist the impact of high-temperature slag.

  ● Annular heat dissipation ribs: Increase the surface area of the tank, accelerate heat dissipation and reduce thermal stress concentration.

  ● Flexible connection technology: The tank body and the ear axis adopt an articulated structure to relieve deformation stress.

Advanced manufacturing process: Ensure performance consistency

  ● Vacuum casting technology: Reduce the internal pores of alloy steel and improve density.

  ● Lining pre-sintering process: Pre-sinter the refractory material before installation to avoid cracking during use.

  ● Automated welding: Laser tracking welding ensures the high temperature strength of the weld.

Usage and maintenance specifications

  ● Preheating system: The new tank needs to be heated to 800℃ step by step before the first use (to prevent thermal shock).

  ● Slag layer control: The thickness of a single slag connection does not exceed 2/3 of the tank height.

  ● Upgraded slag cleaning tools: Use high-pressure water jets to clean slag to reduce mechanical damage.

If you need to find a high-temperature resistant solution for your steel production equipment, we provide professional steelmaking slag pot customization services and technical support to ensure that your production line operates stably and efficiently in the long term. Contact us for more product information and preferential quotes!