Kaolin, or ‘china clay’ as it is commonly called, is a hydrated
aluminum silicate crystalline mineral formed over many millions of
years by the hydrothermal decomposition of granite rocks. Hydrous
kaolin is characterized by its fine particle size, plate-like or
lamellar particle shape, and chemical inertness. Hengyang Industry
is a manufactured by the calcination of kaolin to form an amorphous
pozzolanic white mineral additive for use in cement-based products.
Calcined Kaolin is an anhydrous aluminum silicate produced by
heating ultrafine natural kaolin to high temperatures in a kiln.
The calcination process increases whiteness and hardness, improves
electrical properties, and alters the size and shape of the kaolin
particles.
The term LECA, an acronym for “lightweight expanded clay
aggregate,” is also a nickname for the popular semi hydroponic
technique for growing house plants.
LECA is one of the best forms of soil-free growing. It functions on
the principles of semi hydroponics, and more or less, puts
soil-based home gardening techniques to shame.
What is light expanded clay aggregate (LECA Plant)?
light expanded clay aggregate or expanded clay aggregate (LECA or
ECA), also called ceramic pellet, is one of the most popular
lightweight aggregate made by sintering clay in a rotary kiln to
about 1200°C.
Raw materials & applications: there are various types of
lightweight expanded clay aggregate, and the main materials are the
clay, shale, slate, coal powder, tailings, etc.
LECA is mainly applied in construction, interior decoration,
agriculture, horticulture, gardening, playground, hydroponics, etc.
Light expanded clay aggregate (LECA Plant) Application:
| Grading (mm) | Density (kg/m3) | Applications |
| 0-4 | ≤710 | Lightweight concrete, lightweight bricks, prefabricated slab,
lightweight tile, water purification system, agriculture |
| 4-10 | ≤480 | Lightweight concrete, light tile, prefabricated slab, aquaculture,
noise barrier |
| 10-20 | ≤380 | Lightweight concrete, sewage system, gardening, drainage system |
| 0-25 | ≤430 | Floor decoration, light padding, road construction, aquaculture |
Light expanded clay aggregate (LECA Plant) Production Process and
Main Machinery:
The production of the LECA generally requires seven steps:
crushing, mixing, grinding, pelletizing, sintering, cooling and
sieving.
