Porous plug
Porous plug has better porosity and permeability. Production technology is adding carbon-contaning compound into mixture, since carbon-contaning compound can burn out without residue at low temperature, so we adopt low temperature burning out intermediate materials to get the initial porosity. In porous type plug, inside distributes interpenetrating gas channels in different sizes. When blowing stop, the steel and slag from ladle will infiltrate into the deep areas of the plug, to form a secure layer on working surface.
