Metallurgy Lightweight Concrete Aggregate Lightweight Wall Powder Used Vermiculite and Expanded Vermiculite

With the process of removing sand and impurity, crashing, filtrating, vermiculites become exfoliated, they can be divided into different sizes: 0-1mm, 1-2mm, 2-4mm, 1-3.5mm, 3-5mm, 4-6mm and so on, we can produce many sizes as clients required. There are two kinds of vermiculite in our country golden vermiculite and silvery vermiculite, they have different chemical components.
Golden vermiculite 
Chemical components

Chemical Composition	SiO2	Al2O3	MgO	CaO	PH	Fe2O3	impurity
contents (%)	41	18	21	0.8	7-10	3.5	< 3

Silvery vermiculite
Chemical components

Chemical Composition	SiO2	AL2O3 AL2O3	MgO Mg	CaO	FeO	Fe2O3	TiO2
contents (%)	41.2	12.68	24.22	0.96	1.54	4.06	1.33
Chemical Composition	K2O	P2O5	H2O	Na2O Na2O	MnO MnO	impurity	L.O.I
(%)contents(%)	5.97	0.06	3	1.6	0.043	< 5	6.71

 


 
Expanded vermiculite
Exfoliated vermiculite in the process of high temperature roasting, they can expand many times, and the average density of the expanded vermiculite is about 100-130kg/m3, they have small air separation layer, so they are good construction materials of heat preservation, thermal insulation sound absorption, and corrosion proof, and also industry loading material, coating, anti-fire materials. Expanded vermiculite can extensively used in many industries such as construction, metallurgy, chemical industry, light industry, machinery, electric power, petroleum, environment protection communication, transportation and horticulture.
Main applications:
1.construction materials: light materials such as light concrete materials, light calcimine and light mortar.
2. heat resisting material: wall materials, anti-fire board, anti-fire mortar, firebrick, and brake linings.
3. heat preservation, thermal insulation and sound absorption materials: underground pipeline, heat preservation material used in hothouse pipeline, decoration material used in  upholstery and tunnel, also wall and ceiling in the public.
4.metallurgy: steel frame cladding materials, removal of slag when manufacture of iron and foundry
5. agriculture, forestry and horticulture: golf course lawn, seed preservation agent, soil regulation agent, wetting agent, plant growth agent, feed additives, horticulture mixture, fishing and bait.
6 other aspects: adsorptive material, filter aid, active carrier of chemical and chemical fertilizer, sewage treatment, adsorption of seawater oil pollution, cigarettes filter and explosive density regulators.
Applications and technology indicators of different sizes:
Main specifications and technology indicators of vermiculite:

size	bulk specific gravity(Kg/ M2)	water absorption(%)	thermal conductivity (k·M2·h·ºC)	impurity(%)
4-8mm	70-110	480	0.045	3
2-4mm	80-120	465	0.045	3
1-2mm	80-150	420	0.045	3
20-40mesh	100-180	410	0.045-0.055	2
40-60mesh	100-180	400	0.045-0.055	2
60-100mesh	100-180	400	0.045-0.055	2