دخان السيليكا غير المكثف, also known as raw silica fume or primary silica fume, it is chemically similar to densified silica fume, but a different density.This type of silica fume is incredibly light, لديه كثافة 250-350 kg/m3, نشط جدا, وتتطلب مساحة تخزين كبيرة. Undensified silica fume is …Web