Spherical silicon micro powder spray dryer LPG-20

Spherical silicon micro powder spray dryer LPG-20

The spherical silicon micropowder is a white powder and has broad development prospects due to its high purity, fine particle size, excellent dielectric properties, low thermal expansion coefficient and high thermal conductivity. Spherical silicon micropowder is mainly used in large-scale integrated circuit packaging, and is also used in high-tech fields such as aviation, aerospace, coatings, catalysts, medicines, special ceramics and daily cosmetics. Large-scale integrated circuits have strict requirements on the purity of spherical silicon micropowder. Generally, the mass fraction of SiO2 is greater than 99.5%, the mass fraction of Fe2O3 is less than 50 × 10-6, and the mass fraction of Al2O3 is less than 10 × 10 -6. The radioactive elements uranium (U) and thorium (Th) are required to be low in content. At present, most of the high quality spherical silicon micropowder is also dependent on imports. The preparation of high-purity and ultra-fine spherical silicon micropowder has become a hot spot in domestic powder research.

The spraying method is a method in which a solution is atomized by various physical means to obtain a chemical and physical combination of ultrafine particles. Its basic processes are solution preparation, spraying, drying, collection and heat treatment. The method is characterized by relatively uniform particle distribution, but the particle size is submicron to 10 μm, which is a new method for synthesizing particle size controllable nanoparticle oxide.

SC Wean et al. used an optimized spray drying method to prepare nano-SiO2 particles having a hollow spherical shape of 2 to 4 μm. The particles are biocompatible and can be used as drug delivery vehicles in inhaled photodynamic therapy.

Features:

1. Equipped with M-type atomizing disk on the new Zui atomizer

It can produce spherical powder with good fluidity.

It can produce granulated products with uniform particle size distribution.

It can reduce the amount of sticky wall on the flight line.

The average particle size can be adjusted.

2. High recovery rate

Use a low cap method to increase the recovery rate of granulated products.

3. Prevent product cross-contamination

Equipped with a high temperature and high efficiency filter.

Positive pressure operation is possible in the drying chamber.

4. Easy to clean

The hot air chamber is removable for cleaning.

The corner portions of the drying chamber are processed into an R shape.

5. Equipped with folding or bag filter