Ceramic fiber is a fibrous lightweight refractory material with the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and resistance to mechanical vibration. Therefore, it is widely used in machinery, metallurgy, chemical industry, petroleum, ceramics, etc. Glass, electronics and other industries have been widely used. In recent years, due to the continuous increase in global energy prices and the background that energy conservation has become China's national strategy, it saves 10-30% more energy than traditional refractory materials such as insulating bricks and castables. Ceramic fibers have been used more and more widely in China, and their development prospects are very promising.
So far, there are many large and small ceramic fiber manufacturers, but the production process of ceramic fibers with a classification temperature of 1425°C (containing zirconium fiber) and below is only divided into two types: spinning blankets and blowing blankets. Spinning blankets Blanket or spinneret blanket, which one is better? Which process to produce the blanket is more suitable? The analysis from the technical point of view is as follows:
1. The diameter of the fiber: the spinning fiber is thicker, the spinning fiber is generally 3.0-5.0μm, and the spinning fiber is generally 2.0-3.0μm;
2. The length of the fiber: the spinning fiber is longer, the spinning fiber is generally 150-250mm, and the spinning fiber is generally 100-200mm;
3. Thermal conductivity: The spinneret blanket is superior to the spinning blanket because of its finer fibers;
4. Tensile and flexural strength: Spinner blankets are superior to spinneret blankets because their fibers are thicker;
5. Application in making ceramic fiber blocks: Spun fiber blankets are better than spinneret blankets because of their thicker and longer fibers. During the folding process of block production, blown fiber blankets are easy to break and tear, while spinneret fiber blankets are easy to break and tear. It can be folded very tightly and is not easily damaged. The quality of the block will directly affect the quality of the furnace lining;
6. Application of vertical layering of large blankets such as waste heat boilers: spinning blankets have thicker and longer fibers, better tensile strength, and are more durable, so spinning blankets are better than spinneret blankets;
From the perspective of production history, the spinneret production process was the first to be born, but the production capacity of a single line was low, with an annual output of generally 1,000-1,500 tons. With the requirements for improving production efficiency and the continuous exploration and research of production processes, the final invention With the introduction of a more advanced spinning production process, the production capacity of a single production line of the spinning process can reach 2-4 times that of the spinning process. Taking the spinning blanket production line of the British Morgan Thermal Ceramics Company in Shanghai as an example, the annual output of a single line is up to Nearly 6,000 tons; taking the spinneret blanket production line of Japan's Isolate Company in Suzhou as an example, the annual output of a single line is only 1,500 tons, only a quarter of the former.
The spinning production process has been accepted by most industry production giants and customers. Therefore, almost all new ceramic fiber production lines in China have adopted the spinning process in the past five years. In the past five years, major steel and petrochemical projects in China have Especially for projects that require a large number of ceramic fiber modules, almost all of them use ceramic fibre blankets and modules produced by the spinning process. It is not difficult to see that the vast majority of customers highly trust and choose ceramic fibers produced by the spinning process.
Spun fiber blankets also have their own unique applications. If the fibers need to be broken and made into secondary processed products (such as making vacuum formed products, etc.), the spun fiber blankets are easier to fully mix with other raw materials because the fibers are thinner, so More popular.
Therefore, the ceramic fibers of spinning and spinning processes each have their own advantages. Customers should choose the advantages and avoid the shortcomings according to the actual application in order to achieve the best effect. Of course, the applicable occasions of spinning blankets are far more than those of spraying. silk rug.
