North American Refractories Company

Other

Samuel B Bonsall, Iii

Jeffrey E Bogan

Kenneth Noone

Jerry Gerber

A method of applying a high alumina, low cement refractory castable to the surface of a refractory structure, comprising the steps of:

Low cement refractory castable system for wet process pumping/spraying

A method of applying a refractory castable onto a surface of a refractory structure, comprising the steps of: [a)] preparing a thoroughly mixed wet castable for application onto a surface of a refractory structure; [b)] conveying the wet-mixed refractory castable at a set rate under pressure through a delivery hose having a predetermined cross-sectional area to a dispensing device having an air inlet and a dispensing nozzle; [c)] introducing air under pressure into the dispensing device, wherein the air pressure ranges from about 20 psi to about 80 psi and wherein the air has a velocity of about 177 ft/sec at 20 psi and an air velocity of about 484 ft/sec at 80 psi and wherein the velocity increases by about 5 ft/sec for every unit increase in the pressure.

High pressure/volume process for wet shotcreting a refractory castable

A process for applying a refractory castable onto a surface, comprising the steps of: (a) introducing metered amounts of a clay-free, dry refractory castable into a delivery hose, the dry refractory castable having an alumina content of about 40-95%; (b) conveying the dry refractory to a dispensing assembly under pneumatic pressure; (c) introducing water and a set modifying admixture into the dry refractory prior to dispensing the refractory castable from the dispensing assembly; and (d) spraying the hydraulic refractory castable onto a surface.

Dry process gunning of refractory castable

A method of applying a cement-free refractory castable to the surface of a refractory structure, comprising the steps of:

Cement-free refractory castable system for wet process pumping/spraying

A method of applying a refractory castable material to the surface of a structure comprising the steps of thoroughly mixing a refractory castable material comprised primarily of aggregate and a cementitious binder; conveying the refractory material under pressure through a delivery hose to a dispensing nozzle; and adding hydrated lime to the refractory castable material prior to application by the nozzle.

Growing community of inventors

State College, PA, United States of America

Samuel B Bonsall, Iii