Crown sealing and insulation
Lubisol Engineering Co is offering insulating materials and engineering solutions based on positive experience in the field of hermetic sealing and thermal insulation of glass furnace crowns.
Thermal insulation of the crown usually comprises several layers of light silica brick, which reduces the heat loss from 4500 – 5000 W/m2 to 1800 – 2500 W/m2. The limiting factor for the thickness of the insulation is the cost of the insulating materials compared with the amount and cost of the fuel saved. The insulating silica bricks are usually applied in a thickness of 2-3 layers over the crown. Applying more layers does not increase the thermal efficiency because of the rising thermal conductivity of the insulation with almost no pay-back.
Lubisol Engineering Co is offering a much better solution with a more efficient package of monolithic crown insulation. The main advantage of our insulation is the very low specific weight and high efficiency of the insulation, due to the very low thermal conductivity factor, being much lower than the one of the light silica bricks. The specific weight of Lubisol #2-SL insulation is only 0.33 g/cc with a thermal conductivity 0.08 W/m.K. This contributes for reducing the needed thickness of the insulation, so we are able to offer a light and highly efficient crown insulation with a heat losses about 1000 W/m2 at a much lower competitive price. The higher efficiency of the LUBISOL crown insulation brings about 1.0 – 1.5 % reduction of the total fuel consumption at the cost of about 200 Euro for every 1 m2 crown area per year.
We are offering the optimum thickness of the insulation for each individual case, taking into account the thickness of the crown, the maximum melting temperature and the positive experience of our company. The heat losses and the temperature distribution are calculated with a computer program.
Important part of the Lubisol crown insulation package is the hermetic sealing layer of Lubisol Si-Seal kit applied directly over the whole new silica crown for protection against condensation corrosion and rat-holes.
The technical advantages of the Lubisol insulation – reduced rat holing and long service life - are combined with considerable fuel savings, a moderate budget and an early pay back.
Lubisol Engineering Co is also offering the improvement or upgrading of the thermal efficiency of the working glass furnaces by applying a layer of Lubisol #2-SL monolithic insulation over the existing light silica bricks. The application is done easily while the furnace is in operation. It is applicable on almost all type of glass furnace crowns. All additional costs are paid back in less than 1 year.
Lubisol Engineering Co is also offering sealing and insulation of fused-cast and mullite crowns, reducing the heat losses and the material costs.
