A batch of microsilica  (silica fume) produced by Zunyi Lianfeng Industry and Trade Co., Ltd. is exported to Qatar at Tianjin Port. Zunyi Lianfeng has signed trade contracts with foreign customers, with an annual export volume of 6000 tons.

Silica fume is amorphous and powdery silicon dioxide collected by a specially designed dust collector after the oxidation of silicon vapor discharged through the flue during the smelting of ferrosilicon alloy or industrial silicon. The addition of micro silica powder to high-performance concrete has strong toughness, frost resistance, wear resistance, and corrosion resistance, which can improve strength and durability. It has been widely used in infrastructure construction projects and other fields.

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