Nano Microporous Insulation Board Manufacturer

Published thermal data

Our standard microporous insulation board carries four-point thermal-conductivity data — 0.021 W/(m·K) at 200 °C, 0.025 at 400 °C, 0.028 at 600 °C, and 0.034 at 800 °C — the same temperature points a furnace-backup design references. Boards are produced in densities of 220–350 kg/m³ (the 250–350 kg/m³ range gives the best balance of conductivity and handling), from fumed silica with infrared opacifiers and a small fibre reinforcement. Standard boards carry a 1200 °C classification temperature and are rated for continuous service up to 1000 °C; hot-face shrinkage stays below 2% at 800 °C.

Field-proven lining configurations

Reference configurations from steel-plant applications show what a nano-microporous backup layer achieves in service. A 50-tonne ladle lining — 5 mm microporous board behind 38 mm lightweight brick, 25 mm castable, and 114 mm MgO-C brick — cut the steel-temperature loss to 0.3 °C/min and lowered shell temperature from 370 °C to 240 °C. A 130-tonne ladle — 7 mm board behind 63 mm high-alumina brick, 25 mm castable, and 150 mm magnesia brick — reduced shell temperature by 80–100 °C and removed the need for reheating between casts. These are typical field configurations, not marketing estimates.

Honest specifications

We state the limits, not just the headline numbers. Standard boards are stocked at 1000 × 615 mm in thicknesses of 10–50 mm; sizes outside that matrix are custom and carry a set-up cost. Above the 1000 °C continuous-service limit, shrinkage increases and the board should be de-rated in design — we say so at quotation stage rather than after delivery. Furnace atmosphere matters too: thermal conductivity is lowest under vacuum (around 0.01 W/(m·K)) and higher in hydrogen, so atmosphere-specific selection is part of our sizing support. Lead times are quoted as working-day ranges, because ocean freight and customs clearance introduce variance we do not control.

Application depth

The same board family serves the full steelmaking route: ladles, tundishes, torpedo ladles, hot-blast ducts, RH degassers, and walking-beam furnace skids. In hot-metal transfer, torpedo-ladle insulation raises arrival temperature at the converter by about 40 °C and adds roughly 5% usable volume. On walking-beam furnace water-cooled skids, microporous wrapping cuts cooling-water heat loss by about 24% compared with ceramic-fibre insulation. In furnace relines, replacing a 413 mm conventional lining with a 47 mm microporous build reduces stored heat from 481 MJ/m² to 6.3 MJ/m² — cutting heat-up time and improving temperature uniformity.