Chromite sand is one of the most commonly used and most important basic components of ladle filler sand.
Below is a detailed explanation:
Ladle filler sand ability:
At the moment when the water opening at the bottom of the steel package opens, the water can quickly flow down, preventing the water from condensing above the water mouth.
During the installation process, it has the ability to quickly form a heating layer with a certain strength of “pottery layer” or “copper head”, and after blocking the steel water or melting layer, the sand layer can be deep, and the water mouth can be closed and the cutting force can be effectively cut.
Main component causes of iron sand production:
High melting point: The melting point of steel is as high as (>1900°C), and the melting point of steel is as high as that of steel (usually 1500-1600°C).
Good thermal properties: Under the action of high temperature steel, the surface of the iron, metal, and sand particles can be melted and bonded to each other, forming a dense thermal layer, which is the key to its “self-sealing” function.
Low heating and expansion system number: Comparison of quartz sand, iron quartz sand, when heated, the temperature changes when heating, and the heating temperature decreases.
Good chemical properties: The metal has a good resistance ability when it comes to water and melts, and it is not easy to produce a strong reaction.
High heating rate: The amount of heat in the water mouth area is increased by increasing the heating rate.
The composition of drift sand is usually a mixture:
The iron sand is the most commonly seen core material, however, the iron sand has the most perfect balance of fluidity, thermal speed, and thermal strength.
Because of this, the actual drift sand is usually used as the main base material of iron sand (large proportion, more than 70%), re-addition and other parts.Improved performance:
Glass materials: Quartz sand (SiO₂), quartzite, borax, glass powder, etc. The melting point is low, the liquid phase can be formed at low temperature, the heating process of the sand layer is accelerated, the heating layer is more densely packed, and the strength is higher. Quartz sand is low in price, and its regular heating properties are low due to the addition of additives (however, the amount cannot be exceeded, due to its high temperature expansion, which is easy to give and the silica residue repulses).
Other refractory aggregates: Added partial silica sand (MgO), ZrSiO₄, or quartz sand, etc., to adjust the performance or suitability of specific steels (as high as steel).
Quality materials: a small amount of graphite or charred charcoal powder, which can improve the thermal insulation properties of the thermal layer, prevent cracking, and protect the water outlet from forming the original air.
Auxiliary flow: A small amount (about <1%) of organic materials (such as powdered fat) or free materials, improved sand flowability, guaranteed profit-filling water outlet.
Conclusion:
Pencil sand (metallic sand) is the main foundation material in the majority of the drift sand distribution medium and the key functional material. The high melting point and the excellent thermal performance are the core guarantee of practical performance.
However, when it comes to quality, drift sand is usually a mixture of one kind, except for the main role of iron sand, which includes minerals (like quartz sand), and the addition of quality materials, etc. to improve the overall performance (accelerating heat, raising strength, improving flowability, lowering yield, etc.).
Therefore, it can be said that the main component of drift sand is the main component of drift sand. The correct explanation is that “drift sand is the most commonly used and most important base material”.
