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近年来,美国细磨(-325目)、超细磨石灰岩-碳酸钙市场发生了显著变化,用于塑料、造纸、油漆业的消耗迅速增长。1983年,美国这三大市场的总耗量为106.5万吨,无水砌墙、地毯衬的消耗达一百万吨。生产情况石灰岩占地壳沉积层的15%,储量极为丰富,但能满足填料级产品要求的却有限,因为填料对白度、纯度和晶体结构的要求较为严格。据报导,美国现有五十个洲生产石灰岩,十三个洲的廿一家生产厂生产细磨碳酸钙,适于
In recent years, the United States fine grinding (-325 mesh), ultrafine grinding limestone - calcium carbonate market has undergone significant changes, for the plastic, paper, paint the rapid growth in consumption. In 1983, the total consumption of these three major markets in the United States was 1.065 million tons, with a dry wall and a carpet lining consumption of one million tons. Production Limestone accounts for 15% of the Earth’s crust and is extremely rich in reserves. However, limestone is limited in its ability to meet the filler grade requirements because of its tightness in terms of whiteness, purity and crystal structure. It is reported that the United States now has limestone production in 50 continents and production of finely ground calcium carbonate at 21 production plants in 13 continents.