The difference between spinning process and blowing process for ceramic fiber
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When it comes to the production process of ceramic fibers, the vast majority of ceramic fiber products are made using the spinning (spun) process. As for the blowing (blown) process, it might not be well understood by most people. So, what are the specific differences between the ceramic fiber products produced by these two processes? When designing and selecting ceramic fiber products for thermal insulation, which process should you choose? This article will guide you through the differences between the spinning process and the blowing process in the production of ceramic fiber products.
The production processes are different.
Products made by the blowing and spinning processes in ceramic fiber production have different characteristics.
Property | Spun | Blown |
Fiber Diameter | 3.2-3.5 micron | 2.7-3.0 micron |
Thermal Conductivity | 10% Lower | |
Resiliency | Better | |
Fiber Length | 2” to 10” | ½” to 4” |
Shot Content（212micron） | 7% | 6% |
Shot Size Distribution | Coarse | Fine |
The two processes are suitable for producing different types of products.
Applications of Spun Process Ceramic Fiber:
1. Production of Ceramic Fiber Modules:
– Spun ceramic fiber blankets are superior to blown ones due to thicker and longer fibers. During the folding process in block production, blown fiber blankets are prone to breakage and tearing. In contrast, spun fiber blankets can be folded tightly without easy damage, directly impacting the quality of furnace linings.
2. Application in Large Block Blankets for Boiler Insulation:
– Spun ceramic fiber blankets, with thicker and longer fibers, possess better tensile strength, durability, and longevity compared to blown blankets. Hence, spun blankets are preferred for such applications.
3. Application in Ceramic Fiber Textiles:
– The coarse, long fibers and excellent spinnability of spun ceramic fibers make them dedicated raw materials for producing ceramic fiber textiles such as cloth, tape, and rope.
Blown Process Ceramic Fiber:
1. Manufacture of Ceramic Fiber Paper:
– The ceramic fibers produced by the blowing process are finer, making them more suitable for manufacturing ceramic fiber paper.
2. Applications in Manufacturing High-Alumina Ceramic Fiber Products:
– Blown ceramic fiber cotton, with shorter and finer fibers and a lower thermal conductivity, is more suitable for dispersion and fragmentation. This quality makes it ideal for producing ceramic fiber high-alumina blankets, modules, and other ceramic fiber products.