Carbon black can be used in the metallurgical industry. Many friends do not know this, and low-sulfur carbon black plays a great role in metallurgical auxiliary materials. It can even be said that the quality of carbon black used in metallurgical auxiliary materials determines the quality of metallurgical products. There are also many manufacturers The sulfur content in carbon black for metallurgical auxiliary materials will be regarded as an important indicator for measuring metallurgical products.
Carbon black for metallurgical auxiliary materials is mainly used as a carbon matching material in the smelting process of cemented carbide. The specific usage is that under high temperature resistance, carbon diffuses from the surface to the inside of tungsten particles. During the diffusion process, a part of carbon black is directly mixed with tungsten Particle surface contact participates in diffusion, and another part of carbon black forms carbon monoxide on the particle surface. Under the action of concentration difference, the surface of tungsten particle continuously decomposes to produce carbon for the gas phase carburizing process. Impurities (including sulfur content) in carbon black for metallurgical auxiliary materials have a very obvious impact on the performance of tungsten carbide, so it is the main index to measure the quality of this product.
The biggest requirement for carbon black in metallurgical auxiliary materials is the amount of sulfur content in carbon black. It can be said that the requirement for carbon black sulfur content is very strict, and the smaller the better. If you want to produce carbon black with low sulfur content, it is usually better to use carbon black produced by gas method.