Hydrophobic expanded pearlite for low temperature and its preparing method

A technology for expanding perlite and perlite, which is applied in the field of hydrophobic expanded perlite for low temperature and its preparation, and can solve the problems of increasing factory cost and affecting production, etc.
CN1579985AInactive Publication Date: 2005-02-16上海松亨环保材料有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
上海松亨环保材料有限公司
Publication Date
2005-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an approach to produce hydrophobic expanded perlite that can be obtained by spreading water-repellent on surface of expanded perlite to form hydrophobic protective membrane. It will get a better effect that using organic fats matters or oil matters, esp., silicone oil as water-repellent. The invention remarkably reduces dosage of water-repellent with adding water to dilute water-repellent and then blending and stirring with expanded perlite. It can reduce technics flow, low production cost and ensure production quality that adopting continuous product and completing spray and dry in one time. The invention can be widely used as thermal insulation in oxygen-making industry, low temperature, insulation equipment and other fields.
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Description

technical field

[0001] The invention belongs to the technical field of low-temperature thermal insulation materials, and in particular relates to a hydrophobic expanded perlite for low temperature and a preparation method thereof. Background technique

[0002] The blazing molten matter erupted from a volcano, the product of cooling and condensation can be called lava, but also because the surface of the magma ejected cools so quickly that the atoms or ions in it have no time to combine to form regular crystalline substances, which solidify to form natural lava. The glassy substance, this naturally formed glassy rock, when its chemical composition is SiO 2 Content > 65%, known as acidic glassy lava. Such as perlite, loose rock, obsidian, collectively referred to as perlite.

[0003] Perlite is called expanded perlite after crushing, grading, preheating, high-temperature instantaneous melting and volume expansion of 10-25 times. Expanded perlite has a porous structure, l...

Claims

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