Plugging refractory material having resin binder system
AssigneeGeneral Refractories Company
InventorsFrancis W. Henry, Jr., Subrata Banerjee
Life of this patent
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Abstract
Tris (hydroxymethyl) nitromethane is used as the formaldehyde-source, cross-linking agent for a phenol-formaldehyde or resorcinol polymer resin binder system for a plugging refractory to enhance the plugging refractory's ability to withstand residence periods in a mud gun without premature solidification.
Claims28
A plugging refractory comprising a refractory material and a resin binder system, said resin binder system comprising a phenol-formaldehyde or resorcinol polymer resin and a formaldehyde-source, cross-linking agent, the formaldehyde-source, cross-linking agent being tris (hydroxymethyl) nitromethane.
Blast furnace taphole mix comprising:
- refractory material;
- liquid novolac-type phenolic resin in an amount equal to approximately 19.2% by weight of said refractory material;
- solvent;
- and tris (hydroxymethyl) nitromethane in an amount equal to approximately 0.45% by weight of said refractory material.
Blast furnace taphole mix comprising:
- refractory material;
- solid novolac-type phenolic resin powder in an amount equal to approximately 13% by weight of said refractory material;
- solvent;
- and tris (hydroxymethyl) nitromethane in an amount equal to approximately 0.4% by weight of said refractory material.
A method of making a plugging refractory which comprises adding to a refractory material, a resin binder system, the resin binder system comprising a phenol-formaldehyde or resorcinol polymer resin and a formaldehyde-source, cross-linking agent, said formaldehyde-source, cross-linking agent being tris (hydroxymethyl) nitromethane.
A method of using tris (hydroxymethyl) nitromethane as a formaldehyde-source, cross-linking agent for a phenol-formaldehyde or resorcinol polymer resin binder system for a plugging refractory in order to enhance said plugging refractory's ability to withstand residence periods in a mud gun without premature solidification.
Dependencies are inferred from the claim text.