Mica calcination is to heat the mica to a certain temperature and keep it warm for a period of time to remove the crystal water in the mica crystal, so that the mica will expand significantly along the vertical direction of the cleavage plane during dehydration and become loose and soft.

The purpose of mica ore calcination is to remove free water and crystal water from mica ore. The dielectric constant of water is 80, while the crystal water in the dielectric ore of mica absorbs a large amount of microwave and rapidly heats up, making the mica ore expand rapidly along the cleavage surface and delaminate. Therefore, using microwave to calcine mica ore has high efficiency and obvious energy-saving advantages.

Microwave energy is known as "the second flame of mankind". Microwave energy application technology has been defined as "the new generation technology of the 21st century", "the advanced preparation technology of new materials", and "the future space heating technology" in the world's developed countries. be based on microwave heating The mechanism is different from that of conventional kilns. It is caused by the internal friction of materials and the direct coupling of phonons caused by the movement of polarized particles and forced vibration. The material body directly acts as a heating body. The dielectric constant of the crystal water in the mica ore is high (generally 80), and the absorbing ability is strong, while the absorbing ability of the mica ore itself is low. Using the characteristics of microwave selective heating, the crystal water in the mica ore rises rapidly, making the mica ore expand rapidly and delaminate. It has the characteristics of fast heating speed, energy saving and good product quality.

Because the traditional method of mica calcination is to use an electric kiln to heat mica, the heating of mica is uneven, and the heating time is long, which is not conducive to the layering of mica, and the energy consumption is high. Therefore, microwave calcination of mica will replace the traditional method of mica calcination.