In modern industrial production, refractory materials play an indispensable role, especially in the field of precision casting. Mullite and mullite powder, as important components of refractory materials, have attracted much attention due to their excellent properties and wide applications. This article will introduce the characteristics, technical, application fields and market advantages of mullite sand and mullite powder in detail, aiming to help readers fully understand these two materials.

I. Introduction to Mull Sand and Mullite Powder

Mullite sand and mullite powder are refractory materials with mullite as the main component. Mullite is a mineral with melting point, low thermal expansion coefficient and good mechanical strength, which is mainly composed of aluminosilicate. Mullite sand and mullite powder are made from selected high- raw materials through high-temperature sintering, fine grinding and other processes, and are widely used in precision casting, ceramic manufacturing, refractory materials and other industries.

ullite sand and mullite powder have a rich and diverse range of particle sizes. The particle size of mullite sand usually ranges from 8-16 mesh,16-30 mesh, 30-60 mesh, 60-80 mesh, 80-120 mesh, etc., while particle size of mullite powder is finer, up to -200 mesh, -250 mesh, -325 mesh, etc. These different particle size enable them to meet the needs of different processes and application scenarios.

II. Technical Parameters

The technical parameters of mullite sand and mullite powder are important indicators their quality. Mullite sand and mullite powder have the characteristics of high alumina content, low iron content, low impurity content, high bulk density and high refractoriness etc., which make them perform excellently in high temperature environment and can effectively resist high temperature erosion and chemical corrosion.

III. Characteristics and Advantages

Mull sand and mullite powder have the following significant characteristics and advantages:

(1) High refractoriness

The refractoriness of mullite sand and mullite is all above 1700°C, and the refractoriness of ZYM-45 grade can reach 1770°C. This means that can maintain stability at extremely high temperatures without melting or deformation, thus providing a reliable guarantee for high-temperature processes.

(2) Low iron content and low impurities

Low iron (Fe₂O₃ content between 1.0%-3.0%) and low impurity content (such as TiO₂, K₂O Na₂O, Ca MgO, etc., all of which are low) make mullite sand and mullite powder less likely to undergo chemical reactions in high temperature environment, and can reduce the impact of impurities on castings or products, and improve the quality of the final products.

(3) Low Dust Content

The dust content is extremely low (maximum 0.1%), which only helps to improve the working environment and reduce dust pollution, but also ensures that the material does not affect the performance and quality during use due to excessive dust.

(4) Coefficient of Thermal Expansion

The coefficient of thermal expansion of molten sand and molten powder is relatively small, which means that they have smaller volume changes with temperature changes can effectively reduce cracks and deformation caused by thermal expansion and contraction, improving the dimensional stability of the product.

(5) High Bulk Density

The high bulk density ( 2.45g/cm³-2.60g/cm³) of molten sand and molten powder gives them good corrosion resistance and wear resistance, they can maintain stability in high temperatures and complex chemical environments.

(6) Fully Calcined Raw Materials

The raw materials of molten sand and molten powder are fullyined, ensuring the chemical stability and uniformity of the material's physical properties, thereby improving the reliability and consistency of the product.

(7) Standard Grain Size

The grain size of the product is strictly controlled within the standard range, which not only helps to improve the effectiveness of the material but also ensures adaptability and consistency in different processes

IV. Application Fields

Molten sand and molten powder, with their excellent properties, have been widely used in many fields:

(1) Precision Casting

olten sand and molten powder are important materials in the precision casting industry, especially suitable for the production of complex and precise castings such as stainless steel, alloy steel, carbon, heat-resistant steel, titanium alloys, nickel alloys, aluminum alloys, cast iron, cast copper, etc. They are mainly used to manufacture the shell of castingolds, which can effectively resist high-temperature erosion and ensure the precision and quality of castings.

(2) Silica Sol Investment Casting

In silica sol investment, molten sand and molten powder can be used as shell materials, which can combine with silica sol to form high-strength molds, improving the surface quality and dimensional of castings.

(3) Lost-Wax Casting

Lost-wax casting is a highly precise casting process, and molten sand and molten powder effectively fill the details of the wax mold, ensuring that the complex shape and fine structure of the casting are perfectly presented.

(4) Vacuum Casting

Vacuum has extremely high requirements for the purity and refractoriness of materials, and the low impurity content and high refractoriness of molten sand and molten powder make them an ideal for vacuum casting.

(5) Gypsum Filled V-Process Casting

In gypsum filled V-process casting, molten sand and molten powder combine with gypsum to form high-strength molds, improving the surface quality and dimensional accuracy of castings.

(6) Casting Coatings

Mol sand and molten powder can also be used to make casting coatings, which can improve the surface smoothness and anti-adhesion performance of castings.

(7)ing Mold Shell

Molten sand and molten powder are important materials for making casting mold shells, which can effectively improve the strength and refractoriness of the mold and extend service life of the mold.

V. Market Advantages

Molai sand and molai powder have significant competitive advantages in the market:

(1) Easy Removal

Castings made with molai sand and molai powder are very easy to remove from the mold, effectively reducing the time and cost of shell removal.

(2) Deformation or Shrinkage

Due to the low coefficient of thermal expansion of molai sand and molai powder, the castings do not deform or shrink during cooling, improving the product's qualification rate.

(3) High Luster and Good Gloss

The castings have a high surface smoothness, high luster, and good gloss meeting high precision requirements without the need for additional surface treatment.

(4) High Yield

The use of molai sand and molai powder can significantly improve the yield castings, reduce the scrap rate, and thus reduce production costs.

(5) Quality Control

Molai sand and molai powder manufacturers usually have a sound quality control, with strict quality inspections at every stage from raw material procurement to finished product shipment, ensuring product quality is stable and reliable.

VI. Packaging and Transportation

Molai and molai powder are usually packaged in 25kg plastic woven bags or kraft paper bags, packed into 1000-1500kg big bags or placed on pallets with plastic film covering. This packaging method is convenient for transportation and effectively protects products from moisture and pollution.

In terms of transportation, molai sand andai powder are usually transported by container. A 20-foot container can carry