Sealed paste, if we look at it alone, may only be a related product, but what is the process of refining sealed paste? This is the new knowledge that our enclosed paste editor needs to popularize to you today. We hope that everyone can take this article seriously and learn the knowledge points you want to know from it.
In modern cast iron production, most still use cupola melting (either alone or in combination with an electric furnace). This is because cupola has the advantages of low comprehensive energy consumption, meeting the requirements of large-scale continuous production, simple structure, and convenient operation. With the development and progress of environmental protection technology, control technology, and casting coke technology, there is a trend of further expansion in cupola smelting.
For a long time, China's cupola has been fueled by metallurgical coke and local coke (also known as earth coke), which seriously restricts the improvement of cupola smelting technology and economic level, and has become a key link in cast iron production. In the early 1980s, China made significant progress in the research and production of cast coke on conventional coke ovens, forming a large production capacity, producing various levels of cast coke, formulating national standards, and achieving significant benefits in casting production applications. However, the cast coke produced using conventional coke ovens (referred to as conventional cast coke, the same below) is mainly made from high-quality coking coal, which is limited in resources. The coking time for simultaneously producing cast coke is more than twice that of metallurgical coke, resulting in increased production costs. How to use abundant and high-quality anthracite coal to refine coke is the direction of efforts for coking workers and the expectation of foundry workers. With the development of coking technology, formed coke technology is becoming increasingly mature and perfect. It mainly uses weakly viscous coal or anthracite as the main raw material, mixed with a small amount of coking coal and binder, and then enters the carbonization furnace to refine it into coke.
