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China Expanded Vermiculite Powder Suppliers - Lightweight Mineral Factory for Insulation and Fire Resistance

WANCHENG MINERAL is a leading factory and suppliers of expanded vermiculite powder in China, offering a lightweight mineral material derived from natural vermiculite ore. This unique product undergoes high-temperature expansion followed by grinding or classification, resulting in a fine powder with exceptional properties. Natural vermiculite is formed from hydrated magnesium-aluminum silicate, characterized by a layered structure that expands when heated due to steam generated from trapped water. Expanded vermiculite powder boasts a low bulk density and a highly porous structure, making it an excellent choice for thermal insulation, sound absorption, and fire resistance. Compared to regular expanded vermiculite particles, our powder offers finer particle sizes and improved dispersibility for varied applications. It serves as an ideal lightweight filler, insulating additive, fire-resistant mineral component, soil amendment, absorbent powder, and functional filler across industries such as construction, agriculture, coatings, refractory materials, friction products, animal feed carriers, and industrial formulations. At WANCHENG MINERAL, we prioritize providing high-quality expanded vermiculite powder with stable particle sizes, exceptional absorption, and low thermal conductivity. Our products are customizable based on mesh size, bulk density, moisture content, packaging, and specific application requirements. We recommend customers engage in sample testing prior to bulk orders to ensure full compatibility with their production systems. As a non-metallic mineral material, our expanded vermiculite powder is prized for its natural origin, thermal stability, and versatility in applications. It is particularly beneficial for those looking to reduce material weight, improve insulation, increase porosity, enhance fire resistance, or incorporate a mineral carrier with strong absorption properties. Trust WANCHENG MINERAL for quality control, consistent supply, export packaging, and professional service as your reliable partner in sourcing expanded vermiculite powder from China.

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Product Details

Chemical Composition Analysis

Chemical Component	Typical Content	Description
SiO₂	35% - 45%	Main silicate component
MgO	15% - 25%	Typical vermiculite component
Al₂O₃	8% - 15%	Aluminosilicate component
Fe₂O₃	5% - 12%	Varies by ore source
K₂O	2% - 6%	Interlayer component
CaO	1% - 4%	Minor component
TiO₂	0.5% - 2%	Trace component
Loss on Ignition	Reduced after expansion	Depends on processing

Frequently Asked Questions

What is the primary chemical component in this material?

Silicon Dioxide (SiO₂) is the main constituent, accounting for 35% to 45% of the total composition, forming the foundational silicate structure.

Why does the content of Fe₂O₃ vary?

Iron oxide (Fe₂O₃) content ranges between 5% and 12% primarily due to natural variations in the geological origin and raw ore source.

What role does Magnesium Oxide (MgO) play in the composition?

MgO makes up 15% to 25% of the composition and is a characteristic component that defines the chemical and thermal behavior of the mineral structure.

What causes the "Loss on Ignition" variation?

Loss on Ignition depends on thermal processing and is significantly reduced after the expansion process as interlayer water and volatile elements are released.

Are trace elements like TiO₂ and CaO significant to product performance?

Titanium dioxide (0.5% - 2%) and Calcium oxide (1% - 4%) are minor trace elements naturally occurring in the ore that do not negatively affect standard physical or chemical stability.

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