QT-7 series is a product produced by ultra-fine ring roller mill, with a fineness range of 600-1500 mesh and a blue light whiteness of 75-93 degrees. This series of products has a high fine powder content, a complete classification of fineness and whiteness, and can provide customers with the most suitable products. This series of products is mainly used in PVC foam board, PP/PE/PVC pipe materials, plastic masterbatch, non-woven masterbatch, coatings and other fields. Product model: QT-70, QT-72, QT-75, QT-77. QT-78, etc. Category: Ultrafine calcium carbonate powder Keywords: mining, mineral powder processing Serial number: QT-7 Packaging type: ton bag, 25 kg small bag QT-7 series is a product produced by ultra-fine ring roller mill, with a fineness range of 600-1500 mesh and a blue light whiteness of 75-93 degrees. This series of products has high fine powder content, complete fineness and whiteness classification, and can provide customers with the most suitable products.