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Nano microporous insulation boards for high-temperature industrial applications

Applications

Nano Microporous Insulation for Steel Ladles

In steelmaking, maintaining molten steel temperature while minimizing shell heat loss is critical for energy efficiency and operational safety. Nano microporous insulation boards are widely used as backup insulation in steel ladles and tundishes, replacing conventional high-density refractory back-up layers.

The ultra-low thermal conductivity of nano microporous materials—close to still air—allows a much thinner insulation layer without sacrificing performance. This translates into lower external shell temperatures, reduced heat loss during transport, and measurable energy savings.

  • Operating temperatures up to 1,000°C depending on configuration
  • Significant reduction in shell temperature
  • Thinner lining design for increased ladle capacity
  • Excellent thermal shock resistance

View our steel ladle insulation boards or contact us for a project-specific design.

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Nano Microporous Insulation for Industrial Furnaces

Industrial furnaces—whether used for heat treatment, melting, or thermal processing—require stable high-temperature performance and minimal heat loss. Nano microporous insulation boards serve as high-performance back-up insulation behind hot-face refractories, reducing heat transfer through the furnace wall.

Compared with traditional insulating firebrick or ceramic fiber backup, nano microporous boards offer lower thermal conductivity in a thinner profile. This allows furnace designers to reduce wall thickness, lower shell temperatures, and improve overall thermal efficiency.

  • Low thermal conductivity across operating temperature range
  • Reduced fuel or electricity consumption
  • Compact furnace design with thinner walls
  • Good chemical stability and long service life

Explore our standard and customized insulation boards or request technical support.

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Nano Microporous Insulation for Kilns

Ceramic kilns, glass furnaces, cement kilns, and other high-temperature vessels operate under severe thermal cycling conditions. Nano microporous insulation boards provide a stable, low-conductivity back-up layer that withstands repeated heating and cooling.

The material’s microporous structure limits gas-phase heat conduction and suppresses convection, delivering consistent insulating performance even at elevated temperatures. Its low thermal mass also supports faster heat-up and cool-down cycles.

  • High temperature stability for continuous and batch kilns
  • Low thermal mass for faster thermal cycling
  • Resistance to thermal shock
  • Flexible board, shaped, and laminated options available

Learn more about our product range or book a consultation.

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Why engineering buyers trust Applications

Anchor-tech track record

The steel-mill ladle backup is the application that made Anchor-tech. The first commercial production run in 2014 was a 5 m³ lot of 280 kg/m³ standard board for a Chinese steel mill that was struggling with 200-tonne ladle shell temperatures above 380 °C in summer. That mill installed 30 mm of board behind the working lining and saw shell temperature drop to 290–310 °C, with measurable reductions in ladle heat loss and extended working-lining life. The reference site became the proof point for our entry into the international steel market, and ladle backup remains the single largest application for our product globally — accounting for roughly 35% of our annual volume. Subsequent ladle installations at Tata Steel (India), ArcelorMittal (Europe and Americas), and various Japanese and Korean mills have refined the engineering specification; the typical specification now includes microporous board as the inner backup layer, with the working lining (MgO-C or alumina-spinel castable) on the inside and the steel shell on the outside.

Anchor-tech track record

Furnace and kiln backup is the second-largest application family for Anchor-tech, accounting for roughly 25% of annual volume. The engineering approach differs from ladle backup in two ways. First, the board is installed at the cold-face of the existing working lining rather than as a separate backup layer, because most furnace installations do not have a dedicated backup cavity — the board is bonded to the steel shell with high-temperature cement and the working lining is cast or bricked on top. Second, the thermal-cycling duty on a furnace backup is more severe than a ladle because the furnace operates 24/7 with cold-start cycles during commissioning and major maintenance. For this reason we typically recommend the laminated board (PE film or aluminium foil facing) for furnace applications — the facing protects the board from moisture pickup during the cold-start commissioning phase and from alkaline attack from the cement-bond during installation. Standard board without facing works well in ladle backup where installation is dry and the board is encapsulated.

Anchor-tech track record

The marine and offshore application family is governed by class society rules — Lloyd's Register, DNV, Bureau Veritas, American Bureau of Shipping, CCS — and each class society has a published type-approval procedure for insulation materials. Anchor-tech's aluminium-foil-faced microporous board has type approval from Lloyd's Register, DNV, and CCS, and the relevant certificates are available on the product specification page and on request. For a marine HVAC or marine piping project, we typically supply the product with a class-society witness point at our factory — a surveyor from the relevant class society visits our Guangzhou facility to witness the production run, takes samples for verification, and issues the type-approval certificate per lot. This witness-point service is included in the marine product price at no additional cost; it adds 1–2 weeks to the production lead time but is required for the class-society documentation package that the shipyard needs for sign-off.

Anchor-tech track record

The energy and service-life figures on this page come from customer field data, not from laboratory extrapolation. Each application block identifies the typical service condition (temperature, duty cycle, baseline backup) and the engineering assumption behind the saving claim. Where a saving figure is quoted as a percentage range, the range reflects the variability across similar installations rather than a single optimistic data point. Where a saving figure is quoted as a single number (for example, the 60–90 °C shell-temperature drop on a 200-tonne ladle), it is the typical result from a representative installation; site-specific results depend on the actual operating data, which our engineering team can model against your data. Misapplication of microporous board produces poor field results — typically under-insulation, premature degradation, or moisture pickup — so the application team always confirms the service envelope before quoting. If your service condition falls outside the typical envelope above, the team will advise on alternative product specifications or alternative materials.

Frequently Asked Questions

Quick technical and commercial answers about Applications for engineering buyers, procurement teams, and installers. For project-specific questions not covered here, contact our application engineering team.

A 200-tonne steel ladle running a 95-minute cycle at 1580 °C tapping temperature typically has 200–250 mm of working lining (MgO-C brick or alumina-spinel castable) followed by 30–50 mm of ceramic-fibre blanket as the secondary backup, with a steel shell outside. Replacing the ceramic-fibre blanket with 25–30 mm of microporous board of density 280 kg/m³ reduces the cold-face temperature on the steel shell by 60–90 °C depending on cycle time and ambient, and reduces ladle heat loss through the sidewall by roughly 15–25%. The energy saving is 0.8–1.4 kg of liquid steel per tonne of capacity per cycle from reduced shell loss, plus reduced refractory wear on the working lining from the lower thermal gradient. Most steel-mill customers recover the insulation investment in 4–9 months from energy and refractory savings combined.
Microporous board is engineered as a backup layer behind the working refractory lining, not as a hot-face material. The maximum continuous service temperature is 950 °C for standard board and 1000–1050 °C for the high-temperature grade; hot-face service in furnaces above 1100 °C would exceed the rated temperature and cause progressive densification and shrinkage. The board’s role in a furnace is to sit behind the working lining (castable, brick, or ceramic-fibre modules) and intercept the heat that would otherwise reach the steel shell. In low-temperature furnaces (below 950 °C) the board can serve as the hot face if the duty is mild — typically clean service, no impact, no flame impingement — but this is an unusual configuration. For ladle, tundish, torpedo ladle, and similar steel-handling vessels, the board is always installed as the secondary backup layer outside the working lining.
In a rotary kiln backup, the microporous board is installed between the working lining (typically high-alumina brick or magnesia-spinel brick) and the steel shell. Because the board operates at 200–500 °C (well below its 950 °C continuous rating), thermal degradation is negligible. The actual service life is determined by mechanical factors: vibration from kiln rotation, occasional brick spalling impact during working-lining replacement, and moisture exposure during shutdown. Under normal operating conditions, a microporous board backup lasts 8–15 years — typically longer than the working lining it supports, so the board is replaced at major kiln relining intervals rather than at a fixed interval. Compared to ceramic-fibre blanket backup (which has a 3–5 year service life in the same application due to compression set and alkali attack), microporous board extends the maintenance interval significantly.
Marine HVAC systems operate in a saturated salt-air environment where conventional insulation materials degrade quickly from moisture ingress. Microporous board with aluminium-foil vapour barrier facing is the standard specification for marine HVAC duct and equipment insulation — the foil skin encapsulates the board and prevents moisture ingress into the microporous core, while the board itself provides 2–3× the R-value per unit thickness of mineral wool or cellular glass. A typical marine specification is 20 mm aluminium-foil-faced board on chilled-water piping (4–13 °C service), 30 mm board on HVAC ductwork (13–25 °C service), and 40 mm board on heat-recovery equipment. Class society approvals include Lloyd’s Register, DNV, Bureau Veritas, and CCS; we provide the relevant certificates per project. The aluminium-foil skin also eliminates the need for separate vapour-barrier wrapping on marine HVAC systems, simplifying installation.
For aerospace high-temperature applications (engine nacelles, exhaust re-routing, AP-1 brake insulation), the relevant Anchor-tech product is the vacuum-insulation panel (VIP) family — these are evacuated panels with microporous core wrapped in sealed aluminium-laminate film, giving thermal conductivity around 0.005 W/(m·K) at room temperature. VIPs are used where every kilogram of mass and every watt of heat loss matters. For cryogenic service (LNG piping, LNG carrier membrane containment, liquid hydrogen tanks), microporous board is used as a layer in multi-layer cryogenic insulation systems, typically combined with perlite, foam-glass, or vacuum-jacketed piping. Standard board is rated to -40 °C cold-face operation; for service below -40 °C, the VIP or multi-layer system is required. Aerospace and cryogenic projects are typically engineered on a project basis with our application team — please contact us with the specific temperature envelope and mass budget.
Energy savings depend on the baseline — what the existing backup is, what the furnace temperature is, and what duty cycle the furnace operates. As a rough guide: a 950 °C continuous furnace with 100 mm of ceramic-fibre blanket backup, retrofitted to 30 mm of microporous board + 70 mm of calcium-silicate, sees a 12–18% reduction in fuel consumption at the same throughput. A 1200 °C continuous furnace with brick + ceramic-fibre backup, retrofitted to 25 mm of microporous board behind the existing brick, sees a 6–10% reduction. The absolute savings are highest in cyclic furnaces (batch furnaces, forging furnaces, heat-treatment furnaces) where the heat stored in the backup mass is the dominant loss; cyclic furnaces typically see 15–25% reduction. We provide a free energy-saving analysis for any retrofit project where the customer can supply the existing backup specification, furnace temperature profile, and duty cycle.
Yes — there are four service conditions where microporous board is the wrong specification. First, hot-face service above 1100 °C continuous — the board will densify and shrink, leaving gaps in the lining; for this service use ceramic-fibre modules or high-alumina fibreboard. Second, direct flame impingement or jet impact — the board has low mechanical strength and will erode; protect the board with a working refractory layer in any flame or jet service. Fourth, submerged liquid service — microporous board is not designed for submerged service; it will absorb water and lose its insulating value. If any of these conditions apply, we recommend alternative products during the consultation phase rather than at installation. We have a written “do-not-use” application list that we share with the engineering team to prevent misapplication; please consult us if any of the four conditions above are in your service envelope.