It becomes boiling at a certain height in the furnace. The working principle of the combustion boiling furnace is to crush the pyrite to a certain particle size, blow it up with the wind, and burn it in a boiling state at a certain height in the furnace. Vulcanization, also known as cross-linking and maturation, is a process in which cross-linking aids such as vulcanizing agents and accelerators are added to rubber to convert linear macromolecules into a three-dimensional network structure under certain temperature and pressure conditions.