The inside of a pre-calciner (preheater) tower at a cement plant. In this system the hot combustion gasses from the kiln are passed up through the falling raw meal in a series of cyclones. The average preheater typically produces a hot feed that is 20% calcined when it enters the kiln, increasing the clinker output of the plant. Watch out for stainless steel that exhibits signs of chloride stress corrosion cracking on your preheater tower. Salts in the raw mix are often evaporated in the kiln and re-condense on cool points further upstream in the form of sodium chloride or potassium chloride.

By |2019-04-12T05:35:44+00:00April 12, 2019|Projects|0 Comments

We got a call complaining that the new brick floor we supplied to this acid plant was heaving and cracking it’s phenolic mortar joints. We discovered that although the phenolic mortar could take hot sulfuric acid, as could the brick, there was a Viton (flouroelastomer) expansion joint right beneath the hot acid tank in this picture. Whenever the tank overflowed it destroyed the expansion joint – exposing the asphaltic membrane beneath to hot H2SO4, which caused membrane failure and allowed sulfuric acid into the concrete foundation. Call Interep for tips on your brick design to avoid situations like this.

By |2019-03-20T06:35:51+00:00March 20, 2019|Projects|0 Comments