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Processing methods


The technological equipment in “White soot” department is mainly from Italy, Germany, France and Bulgaria.

The manufacturing process consists of three main stages:

First stage – Sodium silicate solid is dissolved in autoclaves at certain temperature and pressure. The solution is filtrated.

Second stage – Second stage is precipitation in syntesis reactor. The raw materials are sodium silicate solution,chemical purified water and carbon dioxide.

Obtained impure suspension is washed on vacuum drum filter to reduce Na2CO3 content and acidifier to certain pH.

Last stage – The pure suspension is drying in Spray vacuum dryer to powder.


Our technology is develop according to current requirements.