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Saudi Steel Plant Reheating Furnace Ceramic Fiber Module Insulation Project



Project Name:
Insulation Upgrade of Reheating Furnace with Ceramic Fiber Modules in a Large Saudi Steel Plant

Location: Industrial area near Riyadh, Saudi Arabia
Construction Year: 2023
Products Used: SUNTHERM Ceramic Fiber Modules (Standard Type, High-Density Type)
Quantity: Approx. 350 m³
Application Areas: Furnace roof, furnace walls, furnace bottom insulation layer, and burner sealing zones

Project Background
This steel plant is one of the key steel producers in Saudi Arabia. The reheating furnace operates continuously under extremely high temperatures of 1150–1300°C. Traditional insulation materials are not only heavy, increasing the load on the furnace structure, but also have relatively high thermal conductivity, resulting in substantial heat loss and high energy consumption. In addition, conventional materials often suffer from damage or detachment under frequent thermal shocks, leading to shortened maintenance cycles and increased costs.
The client urgently required a more advanced insulation solution to achieve the following goals:

1. Comply with Saudi Arabia’s strict industrial energy-saving and environmental protection standards, reducing energy consumption and carbon emissions.

2. Improve furnace thermal efficiency, shorten heating-up time, and boost production efficiency.

3. Enhance the stability and durability of the insulation layer, prolonging furnace service life and reducing production downtime caused by maintenance.


SUNTHERM Solution

1. Customized Module Design: According to the different temperature zones and thermal stress of the furnace, SUNTHERM designed tailor-made ceramic fiber modules. For example, high-density modules were used for the furnace roof to withstand higher mechanical loads and temperatures, while standard modules were applied to the walls and bottom for cost-effective insulation performance.

2. Special Installation Method: A staggered arrangement was applied to eliminate thermal bridges, ensuring optimal heat transfer resistance. Specially designed high-temperature anchors firmly fixed the modules to the steel structure, preventing displacement or detachment under extreme operating conditions.

3. Sealing Measures: Around burner areas, ceramic fiber sealing materials were applied to minimize heat leakage and further enhance insulation performance.


Project Details

1. Ease of Installation: Prefabricated modules were produced and tested in the factory, enabling quick on-site assembly. Compared with traditional insulation methods, installation time was reduced by approximately 40%, minimizing furnace downtime and related production losses.

2. Significant Energy Savings: Post-project monitoring showed that furnace thermal efficiency increased by around 10%. Fuel consumption dropped considerably, saving about 1.5 million cubic meters of natural gas annually, while significantly reducing carbon emissions.

3. Improved Structural Stability: The lightweight ceramic fiber modules reduced the furnace’s overall weight, easing the load on the steel structure. Their excellent flexibility and thermal shock resistance effectively mitigated thermal stress damage, extending the maintenance cycle from 2–3 times per year to once every 3–4 years.


Application Results

1. Lower Surface Temperature: The furnace surface temperature decreased from approximately 150°C to below 70°C, improving the workshop environment and reducing operator safety risks.

2. Higher Production Efficiency: The heating rate increased, reducing steel heating time per batch by about 15 minutes, resulting in an annual production increase of approximately 8% without additional equipment investment.

3. Enhanced Reliability: The insulation layer maintained excellent stability and reliability during long-term high-temperature operations, with no cases of module detachment or damage, ensuring continuous and stable steel production.









Project Summary
This project highlights the outstanding performance of ceramic fiber modules in high-temperature furnace insulation. By adopting SUNTHERM’s advanced ceramic fiber module solution, the Saudi steel plant successfully achieved energy savings, efficiency improvement, and extended furnace lifespan. The customer expressed high satisfaction with the results and plans to continue using ceramic fiber modules in future projects and equipment upgrades. This case not only strengthens SUNTHERM’s presence in the Middle East market but also serves as a successful example for global steelmakers pursuing energy efficiency, emission reduction, and sustainable development.










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