Why using boron oxide rather than boric acid in the furnace lining refractory industry?

As we all know, In the furnace lining refractory and some other industries, boron oxide and Boric Acid are both ok to use, but under some circumstances, we recommend boron oxide rather than boric acid, especially in furnace lining refractory industry. The specific analysis is as follows:

    1.Effects of water:

Boric acid is the hydrate of boron oxide, and its molecular formula is H3BO3, which can be expressed as B2o3.3H2O, from which it can be seen that boric acid contains a lot of crystal water, and its crystal water content is 43.69%. When boric acid is heated, a large amount of water vapor is generated due to the vaporization of crystal water, which forms a large number of boiling white foam until all the water in boric acid is vaporized and volatilized. The moisture in boron oxide is generally very small, less than 2.5%, so it does not appear when boric acid is heated.

It has been proved that using of boron oxide has the following advantages than using of boric acid:

    a.Make the furnace mix tighter.

    b.Avoid the bad influence caused by water vapor on the insulation layer In the oven and the adverse effect on fire resistance.

   c.Reduce the probability of water vapor forming iron oxide on the wall.

   d.Avoid the false alarm phenomenon caused by high water content of the lining.

   e.Reduce the scouring force caused by bubbling on the furnace lining.

   f.Reduce the energy consumption caused by the dehydration and vaporization of boric acid.

    2.Effects of acidity:

The PH value of boric acid solution is about 2 ~ 3, and the PH value of boron oxide solution is about 5, it can be seen that the acidity of boric acid is much stronger than that of boron oxide, which will produce greater chemical corrosion of the furnace lining, thereby reducing the service life of the furnace lining.

    3.Impact of production time:

Using of boron oxide in production will save 1/4 of the oven time than using of boric acid.

    4.Improve adhesion:

The melting point of boron oxide is 450℃, and the liquid phase produced can be well coated on the surface of coarse quartz sand, so that the quartz sand is better bonded.

All in all, using of boron oxide instead of boric acid in production can improve the life of the furnace lining, reduce energy consumption and improve the product quality, it is not only more cost-saving but also safer, it is more and more popular to choose boron oxide rather than boric acid for customer in lining refractory industry.