Sodium Hexametaphosphate, A Commonly Used Binder by Refractory Manufacturers

Refractory material is a special material with high temperature, corrosion resistance, erosion resistance and other characteristics. It is usually used in high temperature industrial fields. In the manufacturing process of refractory materials, binder is a necessary additive. Sodium hexametaphosphate is a common binder for refractory materials.

Sodium Hexametaphosphate

SHMP 68% Min

Glassy industrial sodium hexametaphosphate dissolves slowly in water, so when used as a binder for refractory materials, it must be crushed into powder to accelerate its dissolution. It can be mixed with water in any proportion, so that refractory materials can be used because of their good fire resistance. Become material that people understand. Therefore, business users still need to understand relevant standards when selecting materials:

1.Refractory resistance of materials

2. Compressive strength of materials

When some companies choose refractory materials, they cannot simply consider the refractory degree, but also consider the refractory degree and heat resistance, as well as the compressive strength of the material.

Sodium hexametaphosphate is a new refractory material with good properties among phosphates. It has good thermal shock stability, high compressive strength, strong slag corrosion and impact resistance, high load softening temperature and chemical stability. Its use temperature varies according to the variety and grade of raw materials, ranging from 1000 to 1800°C. For example, when magnesium materials are used as refractory aggregates and powders, industrial sodium hexametaphosphate is often used as a binding agent.

From the outside, it has a linear long chain configuration, which is adsorbed to the surface of the particle through the end groups, while the middle chain basically does not participate in bonding, and can provide additional electrostatic repulsion. The anions ionized after sodium hexametaphosphate is dissolved in water are adsorbed on the particle surface, increasing the electronegative property of the particle surface; in addition, the ionized Na+ ions can increase the thickness of the double electric layer. Under these two effects, sodium hexametaphosphate It has a dispersing effect.

At this stage, affected by factors such as economic downturn, sluggish demand, and increasing constraints on resources and environmental protection, the high-temperature industry and the refractory materials industry have entered a new stage of development that improves quality and efficiency. The adaptability of refractory raw materials has also put forward solutions beyond traditional ones. The new requirement is that sodium hexametaphosphate as a binding agent can be used correctly in high temperature environments, thereby improving the actual effect.

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