Micro silica powder is also known as silica fume or condensed silica fume, which is a large amount of highly volatile SiO2 and Si gas generated by ferroalloy in smelting ferrosilicon and industrial silicon (silicon metal). After gas emission, it is rapidly oxidized, condensed and precipitated with air.
Micro-silicon powder is a kind of smoky gray ultrafine powder. With the amount of carbon content, the color changes slightly. Most of the silica fume particles are about 45um.This allows the micro silicon powder can be used in cement.Because the specific surface area of silica fume is very large, it has good pozzolanic activity and filling property.

Step 1: Waste Gas Purification
The outlet flue gas of the electric furnace passes through the hood and main flue gas pipeline. After cooling by the cooler, it enters the cyclone separator, and then passes through the bag filter. The flue gas enters the bag filter through the fan, and the dust is trapped by the inner surface of the bag. After purification, the flue gas which meets the environmental protection standard is discharged from the bag and rises to the top of the filter and discharges into the atmosphere from the discharge port.

Step 2: Silicon Powder Collection
When the resistance or time of the equipment reaches the set value, the ash unloading process begins. By using the negative pressure of the front section of the main fan and switching between the back suction duct and the valve of the inlet and outlet ducts, the dust removal process of each chamber of the bag filter is realized. The recovered dust is sent to the silicon powder homogenization device by the fan through the ash conveying duct.

Step 3: micro silicon powder encryption
After a cloth bag dust collector to collect initial density of micro silicon powder is only 150-200 kg/m3, spend big on transportation fee to use, therefore, after the encrypted spherical micro silicon powder, the mass density by original bulk micro silicon powder is around 0.2 t/m3 rose to 0.3 ~ 0.6 t/m3, so can reduce packaging and shipping, about 30 ~ 60% at the same time, loading and unloading efficiency was improved and occupies less storage space, and dust phenomenon greatly slow down the production site, to improve the working conditions and environment.