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Quality standards:

- Production line modern technology

- Satisfying standards: TCVN 6598: 2000. Content of Na2O + K2O content ≥ 10%; TiO2 <0.02%, SiO2 ~ 65-67%; Fe2O3 ≤ 0.3%; MKN ≤ 0.35%;

- Source of raw materials: exploited in Feldpat field - Van Ban district - Lao Cai

- A team of skilled, experienced, enthusiastic workers.

- Specification: Diverse, suitable for use.

Application:

- Raw materials for making artificial granite tiles, Ceramite tiles.

- Porcelain enamel for glass ceramics, industrial fillers, medical ...

- Glasses ...

- Used as an additive in paints, plastics, elastomers, powders (powders and liquid detergents) and in coatings.

      Technical specifications of feldspar for various uses:

* In the production of porcelain - ceramic:

- Potassium feldspar contains no less than 8% K2O, preferably over 10%. low sodium content <2%. The best quality feldspar, free quartz <5%, lower quality contains up to 20% free quartz. Iron content should be low (<0.1%) and calcium should not exceed 0.5%. After firing, the feldspar color is uniform and no smudges, small dots.

- Feldspar is widely used in ceramics: almost no quartz, containing no more than 25% of silicon; Colors can vary from violet to white, but the minerals must be free of feldspar in the ceramic tiles required from 10 to 55%, in the porcelain from 15 to 30%, in the sanitary ware from 25 - 35% and in the porcelain from 30 to 50%.

- Sodium feldspar is most widely used in porcelain bone because it is cheaper and has a higher flowing effect. However, potassium feldspar should also be used for certain types of porcelain, which increases the hardness and fire resistance of the product.

* In glass enamel production:

For white men, feldspar requires a low iron content of 0.5%. SiO2 68 - 74%, Al2O3 14 - 18%, Fe2O3  0.3%, Na2O + K2O 8-15%, mkn 0.5 - 0.7%.

* In glass manufacturing:

Manufacture of transparent glass, feldspar containing not more than 0.1% of iron oxide and with colorless glass, limited to: 0.3%. The presence of iron and titanium in feldspar is a harmful factor; Organic matter: the amount lost on heating does not exceed 1%.

- The type of feldspar used to make glass is: quartz free 5% and CaO 2%; Al2O3 ≥ 16%; Na2O + K2O ≥ 11.5% and Fe2O3 ≤ 0.1%.

- The level of feldspar in glass manufacturing ranges from 0 to 18%, the lowest in flat glass and woven glass fiber, the highest in fiberglass interrupted; Potassium feldspar is very suitable for glass making due to high durability.

* In other applications:

- Feldspar is used as an adhering agent for carborundum and abrasive powders.

- To make dentures, only pure feldspar of high quality can be used, accounting for 80% of the mixture. Feldspar dentures showed the following chemical compositions: SiO2 65.6%, Al2O3 18.7%, K2O 12.5%, Na2O 2.5%, CaO 0.4%, Fe2O3 0.07%, loss when heated 0.5%.

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