Question:

What is acid refractory? Which refractory products are included in common acid refractories?

Answer:

Acidic refractory generally refers to a refractory material that contains a significant amount of silica.

Features: high free silica content (greater than 94%), is the most acidic refractory.

Commonly used acidic refractory products include quartz glass products, fused silica recombination products, silica bricks and amorphous silicon refractories, and semi-silicon refractories are also generally included.

Some of the clay refractories are also classified as semi-acidic or weakly acidic refractories.

Zircon refractories and silicon carbide refractories are referred to as special acid refractories.