Silicon Metal

Silicon Metal Powder

Silica Fume

Silica Fume

Silica fume (also known as Microsilica) is amorphous powdery silica (SiO2) collected by specifically designed dust collectors from the oxide silicon steam discharged through the flue in the process of smelting industrial silicon or silicon alloy. The average particle diameter of silica fume is 0.15 ~ 0.20 μ m; the specific surface area is 15000 ~ 20000m 2/kg, and it has strong surfactivity. The main ingredient of silica fume is amorphous silica. The rising furnace gas also carries impurities such as free C, Fe2O3, CaO, K2O, Na2O and so on. The color of silica powder varies with the increase of the content of C and Fe2O3, changing from white, off-white, gray, to dark gray. Silica fume directly undergoing dust collection is called prime fume, which has a bulk density of 150 ~ 300kg/m3. In order to facilitate transport and engineering applications, it is also possible to intensify the prime fume.

Silica Fume

Silica fume (also known as Microsilica) is amorphous powdery silica (SiO2) collected by specifically designed dust collectors from the oxide silicon steam discharged through the flue in the process of smelting industrial silicon or silicon alloy. The average particle diameter of silica fume is 0.15 ~ 0.20 μ m; the specific surface area is 15000 ~ 20000m 2/kg, and it has strong surfactivity. The main ingredient of silica fume is amorphous silica. The rising furnace gas also carries impurities such as free C, Fe2O3, CaO, K2O, Na2O and so on. The color of silica powder varies with the increase of the content of C and Fe2O3, changing from white, off-white, gray, to dark gray. Silica fume directly undergoing dust collection is called prime fume, which has a bulk density of 150 ~ 300kg/m3. In order to facilitate transport and engineering applications, it is also possible to intensify the prime fume.

Classification knowledge of microsilica

Micro silica fume, I believe everyone knows and knows it, so, do you know its classification?

What to be careful with when handling microsilica

The fineness of micro-silica fume is less than 1μm, accounting for more than 80%, and the average particle size is 0.1-0.3μm, which is a gray state. Therefore, the bulk density is small, the natural inclination angle is large, fluffy, easy to fly, and difficult to store and transport. It is because of these characteristics that micro-silica fume manufacturers need to be more careful when handling them. So, what is the specific treatment process?

Silicon metal prices remain weak and stable

"FerroAlloys Online" 2022-1-5: In 2022, the metal silicon market will be calm, and various grades of metal silicon products show a weak and stable operation state, only a small drop of 500-100 yuan. At present, the low-grade 553# without oxygen is maintained at the ex-factory price of 19000-19200 yuan / ton, and the price of individual low-iron calcium products is about 300-500 yuan higher, and there is no decline. Products such as 3303# and 421# have dropped to between 21500-22500 yuan/ton, which has been stable for about a week.