Effect of sodium hexametaphosphate on clay bonded refractory castables

With the progress of science and technology, the refractory industry is constantly improving its independent technological innovation ability. Clay-bonded refractory castables have good thermal shock resistance and spalling resistance. Clay-bonded refractory castables are widely used in high temperature kiln equipment such as steel rolling heating furnace, soaking furnace, ladle, tundish for continuous casting, thermal power plant and heat treatment furnace for mechanical processing. sodium hexametaphosphate also plays an important role in the development of clay bonded refractory castables.

Soft bound clay has very small particle size. When it mixes with appropriate amount of water, it forms cohesive material. When it mixes with excess water, it forms clay-water suspension, i.e. slurry, which can remain unclear for several days.

Therefore, in clay-bonded refractory castables, only through dispersant can clay particles be fully dispersed to reduce the water secretion of clay particles, while sodium hexametaphosphate can play a very good dispersing role in clay-bonded refractory castables, making clay-bonded refractory castables have good fluidity and constructability, thus ensuring its good high-temperature performance.

In the past, sodium tripolyphosphate, sodium hexametaphosphate, sodium citrate, sodium tartrate, potassium sodium tartrate, sodium carbonate and other sodium salts were often used as dispersants, and aluminium 60 high alumina cement was used as coagulant promoter. However, according to Xiaobian's knowledge, the dispersing effect of different dispersants on clay was different.

The small edition also lists the order of dispersing effects of various sodium salts: sodium hexametaphosphate > sodium tripolyphosphate > sodium carbonate > sodium citrate > sodium tartrate > potassium sodium tartrate.

It can be seen that the dispersing effect of sodium hexametaphosphate produced by yucai chemical Industry is obviously better than other sodium salts. The reason is also that the long chain structure of sodium hexametaphosphate is used as binder for soft clay and clay bonded refractory castables developed by using sintered super high bauxite clinker as refractory aggregate, with less water consumption, low porosity, compact structure and high strength.

Yucai Phosphate Chemical Plant specializes in producing: sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium hydrogen phosphate, industrial phosphoric acid, trisodium phosphate, aluminum dihydrogen phosphate, solid aluminum dihydrogen phosphate, liquid aluminum dihydrogen phosphate, sodium dihydrogen phosphate and other phosphate series products after more than 30 years of continuous pursuit and development, relying on skilled chemical technology and product development, equipment updating and many universities. Established a good cooperative and sharing relationship, in the chemical industry played a (Yucai phosphate) brand!