Vermiculite is a hydrate that occurs in blocky, flaky, and granular forms, and is a product of the weathering and alteration of natural minerals such as biotite. When its interlayer water molecules are subjected to high-temperature calcination, its volume expands by 18 to 25 times. It is rich in components such as nitrogen, phosphorus, potassium, aluminum, iron, magnesium, and silicates. Vermiculite has a high layer charge number, which endows it with a high cation exchange capacity and strong cation exchange adsorption ability. Its characteristics include: light weight, good water and fertilizer adsorption performance, non-decomposable, and a service life of 3 to 5 years (unlike humus soil, coconut husk, etc., which are prone to decomposition).

In agriculture, vermiculite can be used as a soil conditioner. Due to its excellent cation exchange capacity and adsorption properties, it improves soil structure, retains water and moisture, enhances soil aeration and water-holding capacity, and converts acidic soil into neutral soil. Vermiculite also acts as a buffer, preventing rapid changes in pH levels, allowing fertilizers to be released slowly in the crop growth medium, and permitting slightly excessive use of fertilizers without harming plants. Additionally, vermiculite can supply crops with elements it contains, such as K, Mg, Ca, Fe, as well as trace amounts of Mn, Cu, and Zn. Its water absorption, cation exchange capacity, and chemical composition enable it to perform multiple functions, including fertilizer retention, water retention, water storage, aeration, and acting as a mineral fertilizer. Experiments have shown that incorporating 0.5-1% expanded vermiculite into compound fertilizers can increase crop yields by 15-20%.

In horticulture, vermiculite can be used for cultivating flowers, vegetables, and fruits, as well as for seedling propagation. In addition to serving as potting soil and a soil conditioner, it is also utilized in soilless cultivation. As a nutrient base for potted trees and commercial nursery beds, it is particularly beneficial for plant transplantation and transportation. Vermiculite effectively promotes root growth and the stable development of seedlings. It provides the necessary moisture and nutrients for plant growth over an extended period while maintaining stable root temperature. By ensuring that crops receive sufficient water and minerals from the early stages of growth, vermiculite accelerates plant development and increases yield.

Vermiculite product specifications: 0.5-1mm, 1-3mm, 2-4mm, 3-6mm.
Vermiculite powder is produced by subjecting raw vermiculite ore to high-temperature calcination, screening, and grinding into a powdered form. The main specifications include 20-40 mesh, 40-60 mesh, 60-80 mesh, 200 mesh, and 325 mesh. It is used in: house insulation materials, household refrigerators, automotive mufflers, soundproofing plaster, safes and cellar lining pipes, boiler insulation jackets, foundry ladles, refractory brick insulation cement, automotive insulation materials, aircraft insulation materials, cold storage insulation materials, passenger vehicle insulation materials, wallboard water cooling towers, steel annealing, fire extinguishers, filters, cold storage facilities, linoleum, roofing sheets, eaves boards, dielectric switchboards, wallpaper printing, outdoor advertising, paint (to increase paint viscosity), fireproof cardboards for photographic softboard, gold and bronze inks, and paint extenders, among others.

Main applications of vermiculite powder:
20-150 mesh: Mainly used for building insulation materials, household refrigerators, soundproofing plaster, safe and cellar linings, pipes, boiler thermal insulation jackets, etc.
20-40 mesh: Mainly used in automobiles, aircraft, cold storage rooms, wall panel water cooling towers, steel annealing, fire extinguishers, filters, etc.
40-120 mesh: Mainly used for linoleum, roofing sheets, dielectric barriers, etc.
120-270 mesh: Mainly used for wallpaper printing, outdoor advertising, paint, and fire-resistant card paper for photographic softboards.
325 mesh: Mainly used for golden yellow and bronze colors, ink cartridges, and fireproof fillers.