Sunrise Refractory High Quality and Lower Price of Fire Clay Bricks Price

The clay lightweight thermal insulation brick is mainly composed of floating beads in fly ash, and an appropriate amount of binder and auxiliary materials are added. The auxiliary material used is mainly the refractory clay of Yangquan, and the fineness thereof passes through the 100 mesh sieve. Then, after being uniformly mixed, it is press-formed and calcined at a high temperature to form a lightweight refractory heat-insulating product. The product is divided into three sizes according to the bulk density: 0.6g/cm3, 0.8g/cm3 and 1.0g/cm3. The 0.8 and 1.0 grades can be used for lining or non-erosion gas media and various industrial furnaces that are not in contact with molten materials. Insulation is an ideal energy-saving material.

 

Comparison of raw materials and indicators for the production of clay lightweight insulation bricks

 

The floating beads used in the production of clay lightweight insulation bricks are mainly grayish white, observed under an optical microscope, some are colorless transparent bodies, some are milky white translucent and non-transparent, mostly single, with a particle size of 0.3~200μm. The bulk density was 0.48 g/cm3. The content of AL2O3 in the floating beads is about 23%, and the fluxes Fe2O3, CaO, MgO, Na2O, K2O are higher. The refractoriness of the tested beads was 1350 °C. Binder: The binder is used to polymerize the floating bead particles in an alkali metal silicate water solution, and the sodium silicate solution has better performance. Therefore, the binder generally employs sodium silicate having a density of 1.3 to 1.45 g/cm3. Foaming agent; common air bubbles are rosin soap, soap, sodium dodecylbenzene sulfonate. Soap foam has good durability, while sodium alkylbenzene sulfonate is relatively easy to bubble, but its stability is poor.

For this reason, a foam stabilizer is generally added. Common foam stabilizers are: Nina (ie lauroyl. Ethanolamine), oxides of dodecyldimethylamine, etc., while the latter foam stabilizer is better, curing agent: sodium fluorosilicate is better. The curing agent is used in an amount of 14% to 16% of the total amount. Adding 4% to 10% zinc oxide can improve the refractoriness and water resistance of the product. According to the selection of the above materials, the mixing and mixing - trapping materials - mechanism forming - the compact 1.0g / cm3 clay lightweight thermal insulation brick produced after sintering is sent to the steel. The AL2O3 content of the steel Luo Naiyuan test is 23.32 normal temperature compressive strength average At 3.5MPa thermal conductivity W / (m · K) 350 ° C is 0.22, the test results and GB / T 3994-2013 clay quality insulation refractory brick indicators are much better, especially at the same compressive strength of heat conduction The coefficient is 0.18 smaller.

 

Sunrise Refractory Group's lightweight insulation bricks are currently in accordance with the material area: diatomite insulation brick, clay lightweight insulation brick, poly light ball lightweight insulation brick, mullite thermal insulation brick and alumina hollow ball brick. Among them, the alumina hollow sphere brick with the highest content of AL2O3 is above 85, and the mullite thermal insulation brick is about 60. The price is different depending on the material density.