Silicon carbide is a compound composed of one carbon atom and one silicon atom, in which silicon accounts for 70% and carbon occupies 30% (by weight). It was accidentally discovered by Edward g Acheson while making artificial diamond. Because it is hard and can cut glass, metal and other materials, it was originally used as an abrasive. Since it does not oxidize at almost any temperature, it can be used as a refractory.
Because it is also very stable at high temperature, it has been widely used as filling material for kilns. Because it can resist the erosion of slag, it can be used as slag line brick of aluminum smelting furnace and blast furnace. When it dissolves in the presence of slag, carbon atoms and silicon atoms will become charged ions (C-4 and Si + 4) and be released, so it is also an effective deoxidizer widely used in electric furnace steelmaking. When it is added to gray iron, ductile iron or malleable iron, it is not only easy to dissolve, but also makes carbon and silicon enter the melt in the form of alloy.
As many iron casting plants in China, especially nodular iron plants, have problems such as defects caused by slag flow to varying degrees, and are also faced with the problem of how to meet higher and higher quality standards and increasingly fierce cost competition, silicon carbide, which integrates deoxidizer and carburizer and is rich in resources, will become an important tool for many iron casting plants in China to reduce slag flow defects and improve casting quality, Cost reduction is a very important tool.
In addition, with the increasing improvement and popularization of the technology of producing nodular iron with high magnesium alloy cored wire, the work of partially or completely replacing ferrosilicon with silicon carbide, which can not only increase carbon and silicon, but also play the role of pre inoculation, will also be put on the agenda of many iron casting plants, because it can not only improve the quality of nodular iron, but also further reduce the production cost.
In short, the application of silicon carbide in today's cast iron plants in China is not only imperative, but also the general trend.
Product features:
(1) Increase graphite nucleation core and enhance graphite nucleation ability. Reduce the undercooling of molten iron and the tendency of white mouth of castings.
(2)Good deoxidation effect and purification of molten iron.
(3) Prolong the service life of furnace lining.
(4) Reduce the undercooling graphite in gray cast iron and promote the formation of type a graphite.
(5) Adding graphite in nodular iron production can increase the number of graphite balls, improve the spheroidization rate, make the graphite balls more round and fine, and reduce the amount of spheroidizing agent.
(6) Instead of ferrosilicon smelting, it can reduce aluminum content and reduce subcutaneous pores.
