Ash Hopper Refractories for Boilers

Refractory technology for the power industry has changed with the evolution of new demands for power and economic and environmental concerns. A wide variety of materials are available for use in industrial boilers, package boilers, cyclone boilers, waste-to-energy units, CFB's, ash hoppers and others.

Boilers

A boiler is a device used to burn fuel such as coal to superheat water to create steam. Shown below is a basic schematic of a boiler and its various parts.

Schematic of a boiler.

Schematic of a boiler.

Ash Hopper Refractories

Ash hopper service includes a number of conditions, which can be detrimental to a refractory lining. Refractories used in this service must show good resistance to a variety of destructive conditions.

  • Airborne particulate generated during combustion can cause severely abrasive conditions.
  • Slag can fall into the hopper in large chunks called "clinker". The impact of this clinker upon the refractory can be quite severe.
  • In the case of wet-bottom ash hoppers, the splash generated by falling clinker can introduce severe thermal shock.
  • Products installed in ash hoppers can be cast, gunned or sprayed.
Refractory Notes
Tufshot LI Service Classification - Less Severe
Installation Method - Gun
Impact Resistance - Good
Thermal Shock Resistance - Fair
Abrasion Resistance - Fair
Tufshot LI Service Classification - Less severe
Installation Method - Cast
Impact Resistance - Good
Thermal Shock Resistance - Fair
Abrasion Resistance - Fair
Lo-Abrade G Service Classification - Severe
Installation Method - Gun
Impact Resistance - Excellent
Thermal Shock Resistance - Good
Abrasion Resistance - Good
Versaflow 45 Plus Service Classification - Severe
Installation Method - Cast
Impact Resistance - Excellent
Thermal Shock Resistance - Fair
Abrasion Resistance - Good
Versaflow Thermax Plus Service Classification - Most Severe
Installation Method - Cast
Impact Resistance - Excellent
Thermal Shock Resistance - Excellent
Abrasion Resistance - Excellent
Versagun Thermax Adtech Service Classification - Most Severe
Installation Method - Gun
Impact Resistance - Excellent
Thermal Shock Resistance - Excellent
Abrasion Resistance - Good
Greentec 170 LG Service Classification - Most Severe
Installation Method - L.C Gun
Impact Resistance - Excellent
Thermal Shock Resistance - Good
Abrasion Resistance - Excellent

This information has been sourced, reviewed and adapted from materials provided by ANH Refractories Europe.

For more information on this source please visit ANH Refractories Europe.

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