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珍珠岩是应用日趋广泛的矿产之一。它是玻璃质的火成岩,含有少量化合水。它具有特殊性能,当其微粒加热到软化状态(约870℃),化合水蒸发,导致体积较原来膨胀4～20倍,膨胀结果,其微粒包含无数的焊入玻璃的晶粒,构成优异的保温隔热性能。珍珠岩重量轻,比重约为2.2,碾轧碎的毛密度为1400公斤/米~3。珍珠岩世界产量到1986年达163万吨。美国是主要生产国和消费国。1986年生产43.1万吨,占世界产量26.4%;其它五个主要生产国为苏、希、匈、意和日本。五国产量共占世界产量的57.6%。年产量(万
Perlite is one of the more widely used minerals. It is vitreous igneous rock, with a small amount of water. It has special properties, when its particles are heated to a softened state (about 870 ℃), the combined water evaporates, causing the volume to expand 4 ~ 20 times than the original. As a result of the expansion, the particles contain countless grains welded into the glass to form an excellent Thermal insulation performance. Perlite light weight, the proportion of about 2.2, crushed gross density of 1400 kg / m ~ 3. Perlite world production reached 1.63 million tons by 1986. The United States is a major producer and consumer country. 431,000 tons were produced in 1986, accounting for 26.4% of the world’s total output. The other five major producing countries are Su, Xi, Hungary, Italy and Japan. Five countries accounted for 57.6% of the world’s total output. Annual output (million