Production programme

Micro-milled sands

The micro-milled sands – silica flour are produced by milling in a ironless environment, by classification with use of air separators. The raw material used for the production of micro-milled sands – silica flour is treated silica sand with SiO2 content above 99 %. The chemical purity, favourable particle size distribution, chemical inertia and hardness of micro-milled sands – silica flour is appreciated in the production of glass fibres, ceramic enamels, glazes, as a filler in plastics, in the production of special mortar mixtures, tile adhesives and in the foundry industry for the production of moulds. The sands are being sold in bulk or in bags, transported on trucks or wagons.

Střeleč silica sands are improved natural raw materials. The above-mentioned information is based on average values. The data should be considered as indicative. Occurrence of coarser or finer fractions in trace quantities is possible. The user should test the product and consider, whether it is suitable for the desired purpose. On the customer’s request we can discuss the tolerances of the products data.

Sale and delivery is always based on agreed commercial conditions and relevant company standard or a quality agreement.


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Mikromleté písky - křemenné moučky

Brand name d 50 (µm) Granularity range (mm)
ST 2 27 0 – 0,090
ST 6 16 0 – 0,063
ST 7 12 0 – 0,045
ST 8 9 0 – 0,045
ST 9 6 0 – 0,045

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