Method of coating and protecting coal tip burner with colloidal silica based high temperature and abrasion resistant putty

Patent metadata

Field	Value
Publication number	US-10125050-B2
Application number	US-201615014226-A
Country	US
Kind code	B2
Filing date	Feb 3, 2016
Priority date	Aug 8, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A wear resistant substrate including a metal substrate having a surface, a reinforcing support attached to the surface and cured reaction products of an inorganic curable composition disposed over and through the reinforcing support and bonded to the surface. Also a method of enhancing the wear resistance of a metal surface by attaching a reinforcing support to the surface; disposing an inorganic curable composition over and through the reinforcing support and into contact with the surface; and curing the composition.

First claim

What is claimed:

1. A coal burner including a wear resistant composite, comprising:
a metal substrate having a surface;
a reinforcing support attached to the surface; and
an inorganic curable composition disposed over and through the reinforcing support and contacting the surface, wherein the curable composition comprises a binder part comprising at least one of colloidal silica and alkaline silicate; a filler and aggregate part comprising at least one of alumina powder, ceramic powder, ceramic fiber, metal powder, silicon carbide powder, silica powder, ceramic bead, metasilica and metal oxides, and a cross-linker part comprising at least one of magnesium oxide (MgO),sodium dihydrogen orthophosphate (Na 2 HPO 4 ), sodium silica fluoride (Na 2 SiF 6 ), and sodium borate.

2. The wear resistant composite of claim 1 wherein the curable composition further comprises fluid.

3. The wear resistant composite of claim 1 wherein the reinforcing support comprises a grid of spaced metal elements.

4. The wear resistant composite of claim 1 wherein the reinforcing support comprises a metal mesh.

5. The wear resistant composite of claim 1 wherein the inorganic curable composition is cured and bonded to the surface.

6. The composition of claim 1 being devoid of organic gelation agents.

7. The composition of claim 1 being devoid of organic gelation agents selected from at least one of formaldehyde, formamide, paraformaldehyde, glyoxal, methyl formate, methyl acetate, ethyl formate and ethyl acetate.

8. A wear resistant composite, comprising:
a metal substrate having a surface;
a reinforcing support attached to the surface; and
an inorganic curable composition disposed over and through the reinforcing support and contacting the surface, wherein the curable composition comprises a binder part comprising at least one of colloidal silica and alkaline silicate; a filler and aggregate part comprising alumina powder, ceramic beads larger than 0.1 inches and metal powder; and a cross-linker part comprising at least one of magnesium oxide (MqO); sodium dihydrogen orthophosphate (Na 2 HPO 4 ); sodium silica fluoride (Na 2 SiF 6 ); and sodium borate.

9. A method of enhancing the wear resistance of a metal surface, comprising:
attaching the reinforcing support of claim 8 to the surface;
disposing the inorganic curable composition of claim 8 over and through the reinforcing support and into contact with the surface; and
curing the inorganic curable composition.

10. The wear resistant composite of claim 8 wherein the alkaline silicate is selected from at least one of calcium silicate, magnesium silicate, potassium silicate and sodium silicate.

11. The wear resistant composite of claim 8 wherein the inorganic curable composition comprises 10 to 70 parts by weight of the binder part; 40 to 245 parts by weight of the filler and aggregate part and 0.05 to 15 parts by weight of the cross-linker part.

12. The wear resistant composite of claim 8 wherein the inorganic curable composition consists of the binder part; the filler and aggregate part, the cross-linker part and optionally fluid.

13. The wear resistant composite of claim 8 wherein the inorganic curable composition is cured and bonded to the surface.

Assignees

• Henkel IP & Holding GmbH
• Henkel Ag & Co Kgaa

Inventors

• Shah Jayesh P
• Deshmukh Kedar
• Ghosh Nippon

Classifications

• Y10T428/12604

  Film [e.g., glaze, etc.] · CPC title

• C04B35/14

  based on silica · CPC title

• C04B14/02

  Granular materials {, e.g. microballoons} · CPC title

• C04B14/30

  Oxides other than silica {(ferrites C04B14/363)} · CPC title

• C04B28/26

  Silicates of the alkali metals · CPC title