In the field of metal casting, the quality of molding sand directly affects the precision, quality and production efficiency of castings. As a high-performance aluminosilicate refractory material, mullite sand for casting is favored by the high-end casting industry due to its excellent high-temperature resistance, dimensional stability and chemical inertness. This article focuses on introducing its core applications and advantages, helping you grasp the value of mullite sand for casting in optimizing processes and reducing costs.
Core Applications
1. Precision Investment Casting: It is the core raw material for shell making in lost-wax casting, used in the backing layer and reinforcement layer. Mixed with silica sol and mullite powder, it can form a dense and strong shell, which can resist deformation and cracking during roasting and pouring, ensuring the high precision of parts such as aero-engine turbine blades and automobile engine blocks.
2. Heavy-Duty Casting: With a refractoriness of ≥1750℃, it can withstand high temperatures above 1600℃ and resist the erosion of molten metal and slag. As molding sand or core sand for large steel castings and iron castings, it can maintain the integrity of the mold, avoid defects such as sand inclusion, and reduce the labor cost of cleaning after pouring.
3. Special Alloy Casting: Its low iron and titanium content and good chemical stability can prevent reactions with molten special alloys (such as stainless steel and high-temperature alloys), avoid pollution and oxide inclusions, and ensure the purity and surface finish of castings.
Core Advantages
Mullite sand for casting solves the pain points of traditional molding sand: super high-temperature resistance (≥1750℃) ensures mold stability; low thermal expansion coefficient maintains dimensional accuracy; chemical inertness protects casting quality; good air permeability reduces defects such as air holes. It can improve the qualification rate of castings and reduce post-processing costs, making it an ideal choice for high-demand casting scenarios.
Common Mesh Specifications
Our mullite sand for casting has a complete range of mesh specifications, covering the needs of various casting scenarios. The conventional mesh sizes include 8-16 mesh, 16-30 mesh, 30-60 mesh, 60-80 mesh and 80-120 mesh. We also supply mullite powder specifications such as 200 mesh and 300 mesh, which can be directly matched with the different process requirements of precision investment casting, heavy-duty casting, special alloy casting, etc. Among them, 30-60 mesh is often used for backing slurry production, and 16-30 mesh is suitable for reinforcement layer use, meeting the specific needs of different processes.
Customization Service Capabilities
Relying on modern intelligent production lines and a professional R&D team, we have strong customization capabilities. We can tailor-make mullite sand products with special mesh sizes (customizable from 10 mesh to 325 mesh), purity and particle gradation according to customers' specific casting processes, casting materials and performance requirements. From raw material selection, particle size adjustment to quality inspection, we provide one-on-one full-process service, flexibly adapting to the personalized needs of different industries such as aviation, automobile and metallurgy. At the same time, we ensure the stability of batch supply and the consistency of quality, helping customers optimize production processes and enhance product competitiveness.
Post time: Feb-11-2026
