(1) chromite sand has good resistance to alkaline slag, does not react with iron oxide, etc.; therefore, in practical applications, chromium ore sand can avoid thermal chemical sticky sand; (2) During the molten metal casting process, the solid phase sintering of the chromite sand itself prevents the penetration of the molten metal, thereby preventing mechanical sand

Chromite sand is used for its high thermal resistance, fast chilling capacity and resistance to liquid metal penetration. Its thermal expansion is uniform and clearly lower than that of silica sand thus finning problems are minimised. Chromite sand is provided with a size of  AFS45 – 50 and a typical composition of Cr2O3: 46%, FeO:

pls take our test report  of chromite sand AFS40-45  AFS45-50  as a reference:

Introduction: Chromite sand is used as a highly fireproof sharpener for moulds and cores. Originally from South Africa (SAMANCOR). The sand is produced by crushing chrome ore and its washing in spiral concentrators, subsequent drying, dust cleaning, screening and sorting as per grain size. Chromite sand has established mounting awareness for several years, as a very effective