Calderys

Abrasion

Calderys Solutions

 

Abrasion is a major cause of concern in the main equipments found in the thermal industry. There is a growing need for energy in response to the industrialization of many countries, and now as a consequence power plants are now burning low cost fuels. Low quality coal with high percentage of ash, lignite, and petcoke produce dense fuel ash which impacts the refractory lining. In fluidized bed boilers, abrasion is caused by sand added into the fluid bed. For cement plants, the lining is progressively worn off in the lower part of the tower by hot meal. When, in the lower static units abrasion comes from the clinker.

Abrasion prendre seulement rectangle interieur
Types of particules
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Channel Pouring Furnace
Particules Speed
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Channel Pouring Furnace
Angle of particules flow
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In every case, there are 3 important variables:

  • 1. type of particles (from soft talc to very abrasive coal ash)
  • 2. particle speed
  • 3. impact angle (oblique being the worst)

Abrasion is measured by performing a standard test in which abrasive particles are blown against pre-fired samples. The abrasion resistance is given by the loss of material expressed as a volume in cubic centimeters. The abrasion resistance of monolithic refractories is linked to the aggregate (corundum, silicon carbide and bauxite are better than chamotte), and the matrix. Products with high cold-crushing strength show excellent abrasion resistance.

This test allows us to rank the products:

  • less than 5 cm3 of loss = excellent
  • 5 cm3 to 10 cm3 of loss = very good
  • 10 cm3 to 20 cm3 of loss = good

Calderys’ Low Cement Castables possess a very strong mechanical resistance and a high abrasion resistance associated with the stress caused by thermal shock. A fine example of a LCC with these unique properties would be our best seller CALDE™ CAST GIBRAM. For the boiler industry, our medium-low cement castable CALDE™ CAST M products demonstrate a high abrasion resistance, high thermal shock resistance, and a long service life.

We realize that in the thermal industry, customers needs can slightly differ from one another. Thus, we engineer solutions to match our customers’ requirements with the utmost care. Our goal is simple, to provide innovative solutions to combat the effects of abrasion, thermal shock, and the burning of alternative fuels to let the equipment can operate in a safe and efficient manner.

You need a dedicated anti-abrasion solution, contact our experts!

About Calderys

Our mission is to help you meet your ever increasing production and productivity targets, whilst protecting the safety of your people and the integrity of your equipment. Our focus is to deliver safe, reliable and high performing refractory solutions customized to your needs. Our international production and sales facilities allow us to develop and deliver customized solutions based on monolithic and ready shape monolithic refractory materials worldwide in a fast, efficient, and safe manner.

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