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Kiln preheater towers provide heat transfer from hot gases to kiln feed material. The counterflow of gases and material takes place in cyclones, referred to as stages, in the preheat tower. As material flows from the top to bottom of the tower, it is exposed to increasingly higher temperatures as it is prepared to enter the kiln. Temperatures range from 300°C to 1300°C, with excursion reaching much higher. These high temperatures, as well as abrasion, alkali attack, and buildup, must all be considered when making refractory decisions.

Refractories installed in preheat towers are subject to severe abrasion. Material buildup on the walls can cause plugging and stoppage as well as severe alkali attack. Any refractory installed in the lower portion of the tower should have an anti-buildup component and good abrasion resistance. In the upper part of the preheat tower, the materials are generally “lower tech” monolithics that conserve energy and have good abrasion resistance. HarbisonWalker International’s product lines include the VERSAFLOW®, VERSAGUN®, VERSA-TECH, and THOR® familiesOur THOR® family of products offers a complete line of low-cement, fused zirconia-mullite monolithics. Installation options include traditional vibration casting, pump casting, shotcreting, and conventional wet gunning. All THOR® products exhibit high hot strengths, abrasion resistance, resistance to alkali attack, and superior thermal shock resistance.

Preheat Towers

Product SDS
‘SAIRBOND A dry, air-setting, fireclay mortar
‘SAIRSET A wet, air-setting, fireclay mortar
ARK-70 A 70% alumina, alkali resistant brick
CORAL® BP A burned, phosphate bonded 80% alumina brick
D-CAST® 85TMCC CASTABLE An ultra-low cement, high alumina castable English
H-W PERIBOND A high magnesia content, air settign mortar English
KALA® A 50% alumina brick
KAST-O-LITE® 20-45 G PLUS A 2000°F rated lightweight gunning mix
KAST-O-LITE® 22 G PLUS A 2200°F rated lightweight gunning mix English
KAST-O-LITE® 22 PLUS A 2200°F rated lightweight castable
KAST-O-LITE® 26 LI G ON-LINE® A 2600°F rated lightweight gunning mix
KAST-O-LITE® 26 LI PLUS A 2600°F rated lightweight castable
KAST-O-LITE® 30 LI G PLUS A 3000°F rated lightweight gunning mix English
KRUZITE®-70 A 70% alumina brick
KX-99®-BF A high fired, super duty fireclay brick English
MAGNEL® RS A magnesia spinel, burned brick
MAGNEL® ULTRA A magnesia spinel, burned brick English
MAGNEL® ULTRA AF A magnesia spinel, burned brick English
NARCON® 65 CASTABLE A 65% alumina, low-cement castable English
NO. 36 REFRACTORY CEMENT A wet, air setting, high alumina mortar
ON-LINE® THOR® AZS Rapid Turn-Around, Zirconia-Mullite, Low-Cement Castable English
PLASTECH® 70P STD A 70% alumina, phosphate bonded plastic refractory
PLASTECH® 85P STD An 85% alumina, phosphate bonded plastic refractory
SATANITE A dry, heat-setting, high alumina mortar English
SHOT-TECH® 45 LI A fireclay based, low-cement shotcrete mix
SHOT-TECH® 60 A 60% alumina, low-cement shotcrete mix
SHOT-TECH® 60Z A high alumina, low-cement, zirconia containing shotcrete mix English
THOR AZS-PT PLUS Pumpable, Low-Moisture, Special Zirconia-Mullite Castable
THOR® 30 ADTECH® A 30% silicon carbide, low cement castable
THOR® 30 G ADTECH® A 30% silicon carbide, low cement gunning mix English
THOR® 60 ADTECH® A 60% silicon carbide, low cement gunning mix English
THOR® AZSP PLUS A 24% Zirconia, pumpable, low moisture castable
TUFSHOT® LI PLUS A fireclay based, conventional-cement, low iron gunning mix
UFALA® A 60% alumina brick shape
ULTRA-GREEN® SR An 86% alumina, ultra-low cement castable English
VERSAFLOW® 45 PLUS A fireclay based, low-cement castable English
VERSAFLOW® 55/AR ADTECH® A 55% alumina, low-cement castable English
VERSAFLOW® 60 PLUS A 60% alumina, low cement castable
VERSAFLOW® 70 PLUS A 70% alumina, low-cement castable
VERSAFLOW® 80 C PLUS An 80% alumina, coarse aggregate, low-cement castable
VERSAGUN® 60 ADTECH® A 60% alumina, low cement gunning mix
VERSAGUN® 60 Z ADTECH® A high alumina, zirconia containing, low-cement gunning mix
VERSAGUN® 70 ADTECH® A 70% alumina, low cement gunning mix English
VERSAGUN® ABR PLUS A 60% alumina, low-cement gunning mix designed for abrasion resistance English

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