Industrial Standard of Iron Ores

Industrial Standard of Iron Ores in China

1.       Iron ores for Steel-making

Iron Ores	TFe (%)	Max. content of impurities (%)			Other impurities (%)
		SiO2	S	P
Magnetite	≥56	≤13	≤0.15	≤0.15	Cu≤0.2 Ag≤0.1
Hematite

why to brighten feldspar?

1.       What is Feldspar used for?

Orthoclase and Albite are more used for industrial process. In 2011,  20.7 million Tones of feldspar were produced, mostly by three countries: Turkey (5 Mt), Italy (4.7 Mt) and China (2.1 Mt)(USGS).

Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. Feldspar is ground to about 20 mesh for glassmaking and to 200 mesh or finer for most ceramic and filler applications.