Fine casting sand classification


Release time:

2020-12-24

Precision casting sand is mainly divided into quartz sand and special sand according to the composition of minerals. Quartz sand is commonly known as silica sand. Let's learn about the difference between silica sand and non-silica sand.

  The main mineral composition of silica sand is quartz, and the main chemical composition is SiO2.

1, but silica sand: because of its chemical composition, particle size composition is different, respectively, used for non-ferrous alloy castings, iron castings and small and medium-sized steel castings sand and core sand.
2. Select natural silica sand: used for various steel casting sand and core sand with organic matter as binder.
3, industrial silica sand: used for precision casting, lining or cast steel sand and core sand.

  There are many types of non-siliceous sand with different uses.

1, gray stone sand: crushed by limestone, the main mineral composition is CaCO3, used for steel casting sand and core sand.
2. Sand: The main mineral composition is ZrO2 · SiO2, which is used for core sand or sand surface sand of large steel castings and alloy steel parts, or its powder is used as coating.
3. Sand: The main mineral composition is MgO, which is used for surface sand and core sand of high manganese steel castings, and its powder can be used as paint.
4. Iron ore: the main mineral composition is chromite FeO · Cr2O3, which is used for surface sand and core sand of large or special steel castings, and its powder can be used as coating.
5, sand: the main mineral composition is corundum α-Al2O3, used for investment, ceramic casting shell material.
6, olivine sand: the main mineral composition is olivine (MgFe)2SiO4, used for iron castings, non-ferrous alloy castings and high manganese steel castings of sand and core sand.
7. Bead sand: The main mineral composition is Al2O3, which has the advantages of high temperature resistance, easy collapse, good grain shape, acid and alkali erosion resistance, low crushing rate and strong reuse. It is an ideal modeling material for cast iron, cast steel, cast copper, cast aluminum and core sand. Its cost performance over chrome ore, zircon sand.