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PTJ Shop is Cnc Machining Expert has 12 years experience on custom non-standard parts. As a cnc machining factory We Material research & Design and manufacture products,Material types included machining aluminium,stainless steel,brass,copper,titanium,magnesium and plastic machining etc.,. our factory located in Dongguan, occupies an area Over 5,000 square meters. Cnc Machining Online Quote Serviced aircraft&aerospace, automotive, LED lighting,bike,medical,electronic,mechanical,Oil&Energy and Military industries. Most of Our Customer business who base on Canada, Israel, Japan, Europe and USA, the business grow up year by year. We are sincerely looking forward to your cooperation, warmly welcome you join us to share the market, and expand our business together!

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What is mineral sand?

 Ores, also known as chromite sand, is a special type of sand for foundry. It is a natural spinel mainly made of chromite. It is crushed, ground, and sieved into a specified particle size, suitable for modeling (core making) sand. Chrome ore is divided into 2 grades according to chemical composition; first grade Cr2O3 ≥45%; second grade Cr2O3≥35%. Chrome ore is mainly used in the casting production for the surface sand of large steel castings to prevent the surface of the castings from sticking to sand casting; secondly, it is ground for refractory aggregates for casting coatings; chrome ore is a chilling material and is used in modeling (core making) Sometimes it can replace part of cold iron.

What is mineral sand?

Casting chrome ore is a product processed by natural chromite ore through crushing and screening processes, and its main chemical composition is Cr2O3. This kind of sand has stable heated volume and high thermal conductivity. It not only has a good resistance to alkaline slag when in contact with molten metal, it does not chemically react with iron oxide, etc., but also has the characteristics of solid-phase sintering, which can be very good. Prevent the penetration of molten metal and avoid sticky sand defects.

The main chemical composition of chromium ore sand is Cr2O3. This kind of sand has stable heating volume and high thermal conductivity. When it comes into contact with molten metal, it not only has a good anti-alkaline slag effect, it does not react with iron oxide, etc., but also has its own The characteristics of solid phase sintering can prevent the penetration of molten metal and avoid the occurrence of sand staining defects. It is suitable for raw sand and coatings of various stainless steel, alloy steel and carbon steel gradually modeling cores.

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