Crude&Expanded perlite

タイトルまたは説明

Perlite is a naturally occurring siliceous volcanic glass lava containing combined water, falling into the category of igneous rock. The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume. This expansion is due to the presence of two to six percent combined water in the crude perlite rock. When quickly heated to ***0&#****4;***0 &#***1; , the crude rock pops in a manner similar to popcorn as the combined water vaporizes and creates countless tiny bubbles which account for the amazing light weight and other exceptional physical properties of expanded perlite. This expansion process also creates one of perlite's most distinguishing characteristics: its white color. While the crude rock may range from transparent light gray to glossy black, the color of expanded perlite ranges from snowy white to grayish white. Expanded perlite can be manufactured to weigh as little as *0kg per cubic meter making it adaptable for numerous applications.Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. Perlite is mined and expanded all over the world. China is estimated to be one of the largest consumers and producers of crude and expanded perlite. However, there is very strong world wide production and consumption of perlite. Other leading countries producing perlite include U.S.A. , Greece , Japan , Turkey , Philippines , Hungary , Armenia , Italy and Mexico .