Common applications of vermiculite
Common applications of vermiculite include; horticultural, used in construction, used in agriculture to grow crops & used in industries. Before expounding on more commercial applications of vermiculite, let’s first understand what vermiculite is.
Vermiculite is a hydrated magnesium aluminum silicate mineral which resembles mica in appearance. The mineral is formed by weathering or hydrothermal alteration of biotite or phlogopite. Moreover, vermiculite is mined using open cast mining techniques where the ore is screened. It is then classified into five different particle sizes namely: Large, Medium, Fine, Superfine and Micron. The mineral undergoes significant expansion when heated. The mineral is expanding into worm-like strands. When expanded it drastically increases its volume and absorption ability. It is a silica mineral and are used in agriculture, horticulture, construction and industrial sectors. Vermiculite is also an excellent material for fire-proofing and insulation. It is also used for insulation or as a moisture-retentive medium for growing plants
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Common applications areas of Vermiculite
In general, use coarser grades of vermiculite for loose-fill insulation and horticulture, whilst finer grades for building boards/plasters and in carrier applications for animal feeds and fertilizers.
Below are some of the main sectors where vermiculite is used:
Horticultural
- Potting Mixes
- Seed Germination
- Blocking Mixes
- Sowing Composts
- Hydroponics
- Micro-Propagation
Construction
- Insulating and Light-Weight Concrete
- Gypsum Plasterboard
- Loose fill Loft Insulation
- Acoustic Finishes
- Passive Fire Protection
- Floor & Roof Screeds
- Sound Deadening Compounds
Agricultural
- Bulking Agent
- Fertilizer Carrier
- Pesticide Carrier
- Seed Encapsulation
- Soil Conditioner
- Animal Feed
- Anti-Caking Material
Industrial
- Castables
- Fireproof Safes
- Absorbent Packing for Hazardous Goods
- Brake Pads & Brake Shoes
- Insulation – High & Low Temperature
- Molten Metal Insulation
- Fixation of Hazardous Material
- Furnaces –e.g for Industry and Tobacco Barns
- Insulation Blocks & Shapes
- Nuclear Waste Disposal
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