Expanded Perlite Insulation Material

In addition to the thermal insulation, heat insulation and non-combustibility properties of traditional insulation products, expanded perlite insulation products also have the advantages of light bulk density, high hydrophobicity, good strength, low thermal conductivity, convenient construction, light weight, sound absorption, non-toxic and odorless, and radioactivity absorption. Therefore, expanded perlite insulation products concentrate the three characteristics of light weight, low price and environmental protection, and are widely used as insulation materials in metallurgy, chemical industry, pharmaceutical industry, refrigeration, construction and other industries.

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Description

Expanded perlite products are thermal insulation and refractory products made of perlite as the main component. Expanded perlite insulation products are made of high-quality expanded perlite as the main component, with an appropriate amount of binder, high-efficiency binder, and admixtures, and are formed manually or mechanically. Such as cement, water glass phosphate, etc., and are made of insulation products through stirring, mixing, molding, drying, roasting or curing. The density of expanded perlite is relatively small, generally only 40-120kg/m"; the refractoriness is not high, generally 1280-1360℃. The maximum use temperature of products with different binders is different, usually below 1000℃.

Expanded perlite products are divided into: cement-bonded expanded perlite products, water glass-bonded expanded perlite products according to the type of binder used. In the Chinese national standard, the products are divided into 200, 250, 300 and 350kg/m*4 categories according to their volume density.

Expanded perlite products have the characteristics of light bulk density, low thermal conductivity, and good thermal insulation performance. It is a new type of thermal insulation material. It has shown its excellent thermal insulation and energy-saving effects when used in various kilns.

project		index
		flat panel		Curved plate, tube shell
		Superior products	Qualified products	Superior products	Qualified products
Size tolerance	Length mm	±3	±4	±3	±4
	Width mm	±3	±4	±3	±4
	the inside diameter of mm	±3	±4	＋3 －1	＋4 －1
	Thickness mm	＋3 －1	＋5 －2	＋3 －1	＋3 －2
Appearance Quality	Sealing gap mm			≤2	≤3
	Crack	Not allowed
	Missing edges and corners	Superior products: not allowed Qualified products: 1. The minimum projection size in three directions shall not be greater than 10mm, and the maximum shall not be greater than 1/3 of the side length in the projection direction 2. The total number of missing edges and corners with the minimum projection size in three directions not exceeding 10 mm and the maximum not exceeding 1/3 of the side length in the projection direction shall not exceed 4 Note: Edge damage with the minimum projection size in three directions not exceeding 3 mm is considered as missing edges, and corner damage with the minimum projection size not exceeding 1 mm is not considered as corner loss
	Curvature	Superior products≤3 Qualified products ≤4

project		index
		No. 200		No. 250		No. 350
		Superior products	Qualified products	Superior products	Qualified products	Qualified products
Density kg/m³≤		200		250		350
Thermal Conductivity W (m.k)	298K±2K	≤0.060	≤0.062	≤0.067	≤0.072	≤0.086
Thermal Conductivity W (m.k)	623K±2K (Required for Class S)	≤0.10	≤0.11	≤0.11	≤0.12	≤0.12
Compressive strength,MPa		≥0.45	≥0.30	≥0.50	≥0.40	≥0.40
Flexural strength,MPa		≥0.20		≥0.25
Moisture content		≤2	≤4	≤2	≤4	≤10

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