Whit is chromite sand AFS40-45?
Chromite sand is a naturally occuring spinel consisting primarily of the oxides of chrome and iron.
The AFS-GFN is one meands of measuring the grain fineness of a sand such as chromite sand.GFN is a measure of the everage size of the particles or grains of a sand,for example chromite sand .
The Optical GFN in a sand system is determined by the type of metal poured,pouring temperatures,casting product mix(heavy vs.light casting) and required surface finish,one that optical fineness lever is determined,maintaining a consistent grain structure becomes a critical factor in the quality of the final castings.Sand that is too fine(higher GFN) can creat low permeability and result in gas defects.Sand that is too coarse(Lower GFN) can creat high permeability and lead to problems with metal penetration,rough surface finish,burn-in and burn-on.
Zhengzhou haixu abrasives co.,ltd,manufacturer of chromite sand and chromte flour from China,has been in the field for more than 10 years.
We mainly produce the following sizes
Chromite sand : AFS25-30 AFS30-35 AFS35-40 AFS40-45 AFS40-50 AFS45-50 AFS45-55 AFS50-60 etc
Chromite flour:200mesh 325mesh 400mesh 500mesh 600mesh 800mesh 1000mesh 1200mesh 1500mesh 2000mesh 2500mesh etc
