There are significant differences between high-purity diatomite bricks and ordinary diatomite bricks in composition, performance and application scenarios. The following is a detailed comparison:

I. Composition and purity

High-purity diatomite brick: The main component is high-purity silicon dioxide (SiO₂), and the content is usually above 90%. This kind of high-purity diatomite brick is finely processed and purified in the production process, and the impurity content is extremely low.

Ordinary diatomite brick: The content of SiO₂ in the composition is usually about 70%-80%, and it contains many impurities, such as alumina (Al₂O₃) and iron oxide (Fe₂O₃).

II. Physical properties

Density:

High-purity diatomite brick: the density is low, usually 0.4-0.5 g/cm.

Ordinary diatomite brick: the density is relatively high, generally 0.7-1.0 g/cm.

Compressive strength:

High-purity diatomite brick: Because of its high purity and fine processing, its compressive strength is high.

Ordinary diatomite brick: the compressive strength is low, generally 1-2 MPa at room temperature.

Thermal conductivity:

High-purity diatomite brick: lower thermal conductivity and better thermal insulation.

Ordinary diatomite brick: the thermal conductivity is between 0.13 and 0.20 W/(m k).

Fire resistance:

High-purity diatomite brick: the fire resistance is higher, which can reach about 1600℃.

Ordinary diatomite brick: fire resistance is generally 1250-1300℃.

III. Application scenarios

High-purity diatomite brick: it is mainly used in fields that require high heat insulation performance and purity, such as electronics industry, precision chemical industry and pharmaceutical industry.

Ordinary diatomite brick: widely used in industrial furnaces, thermal equipment insulation layer, as well as power, metallurgy, chemical industry and other industries.

IV. Processing technology

High-purity diatomite brick: the production process needs high-temperature calcination, fine processing and purification, and the process is complicated.

Ordinary diatomite brick: the production process is relatively simple, and it is usually fired at a lower temperature.

V. Price and cost

High-purity diatomite brick: Because of its high purity and fine processing, the price is relatively high.

Ordinary diatomite brick: the price is relatively low and the cost performance is high.

VI. Summary

High-purity diatomite brick is superior in heat insulation, fire resistance and compressive strength, and is suitable for high-end fields with high performance requirements. Ordinary diatomite bricks are widely used in the field of industrial thermal insulation and have high cost performance. Users can choose the appropriate diatomite brick type according to their specific needs.