What is chromite sand powder?
Here chromite sand powder means chromite sand and chromite powder.
Chromite sand is made of natural chromite through screening process to produce different particle sizes.
Chromite powder is a powdery substance of different particle sizes produced by grinding with high chromium alloy ultrafine powder vertical mill.
The main component is chromium trioxide (Cr₂O₃), and the content is usually between 40% and 50%.
The following is a summary of its core features and uses:
Ingredients and physical properties
Ingredients
It is mainly chromite, with the chemical formula of FeO·Cr₂O₃, and belongs to the natural spinel minerals.
The Cr₂O₃ content directly affects the performance. More than 46% is suitable for casting, refractory materials and pigments, and less than 40% is mostly used in metallurgy, glass factories, etc.
Physical properties
Color: dark gray or black, can be used as a natural green mineral pigment due to the presence of Cr₂O₃.
Sizes: The particle size ranges from micrometers to millimeters, and the fluidity is good.
Chromite sand: AFS20-25 AFS25-30 AFS30-35 AFS35-40 AFS40-45 AFS40-50 AFS45-50 AFS45-55 AFS50-60 etc
Chromite powder: 180 mesh, 200 mesh, 270 mesh, 325 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1200 mesh, 1500 mesh, 1600 mesh, 1800 mesh, 2000 mesh, 2200 mesh, 2500 mesh
Hardness: Mohs hardness 5.5-6, excellent wear resistance.
Core performance advantages
High refractory: Melting point is about 2150℃, sintering temperature reaches 1850℃, can withstand molten metal and high temperature kiln environment.
Corrosion resistance: does not react with metal oxides such as iron oxide, and has strong resistance to alkaline slag corrosion.
Thermodynamic properties: high thermal conductivity, fast heat dissipation; good thermal shock resistance, reducing cracks in sintering or casting.
Main industrial uses
Foundry field
Used as molding sand or coating to prevent metal melt penetration (mechanical sand sticking) and chemical sand sticking.
Replace cold iron to accelerate casting cooling, reduce defects such as pores and sand inclusions.
Refractory materials
Manufacture magnesia-chromium refractory bricks and ladle slag line materials to resist high temperature and alkaline slag.
Pigments and glazes
As green pigments, used in ceramic glazes and glass coloring, with stable performance at high temperatures.
Metallurgical industry
Additives for the production of corrosion-resistant metals such as stainless steel and alloy steel.
Precautions
If chromite contains sulfides (such as carbonates), CO₂ may be released at high temperatures to cause pores in castings, and pre-roasting treatment is required.
Chromite sand powder has become an irreplaceable functional material in industries such as casting, refractory, and pigments due to its high temperature resistance and corrosion resistance.
Market Supply
Zhengzhou Haixu Abrasive Co., Ltd. is a major manufacturer and supplier of chromite sand and chromite powder. It provides various types of chromite sand and chromite powder, with sufficient inventory and supports export-grade customization. Its packaging standard is 1000 kg bulk bag.
