Phone Magnifying Glass Menu

Lime shaft kilns are stationary vertical kilns where the raw limestone enters at the top and gravity flows through three thermally zoned sections known as the preheating, calcining, and cooling zones. The process heats the limestone from ambient temperature to 900°C, which is the point where the carbon dioxide is driven off, leaving calcium oxide, also known as quicklime. Modern kilns are typically one of three designs: single shaft, annular, or regenerative. Each respective design is progressively more energy efficient, but all are based on a countercurrent flow of hot air rising from the burners in the calcining zone through the downward material flow.

Our standard linings for vertical shaft kilns consist of wear-resistant hot-face linings and thermally efficient backup linings. This combination provides lime producers with an economical and tough refractory lining that can withstand the thermal and mechanical challenges present in a vertical shaft kiln. Our special magnesite bricks, NARMAG®, provide superior strength and abrasion resistance at high temperatures, while our KAST-O-LITE® family of insulating materials provides high-temperature insulation to optimize thermal efficiency.

Products
Vertical Shaft Kilns

Product SDS
‘SAIRBOND A dry, air-setting, fireclay mortar
‘SAIRSET A wet, air-setting, fireclay mortar
‘SAIRSET 3000 A high alumina air-setting mortar English
CLIPPER® DP A super duty fireclay brick
CORAL® BP A burned, phosphate bonded 80% alumina brick
CORAL® PLASTIC 28-82 ADTECH® An 82% alumina, phosphate bonded refractory plastic English
D-CAST® 85TMCC CASTABLE An ultra-low cement, high alumina castable English
EXPRESS®-27 PLUS A 50% alumina, cement bonded, self flowing castable English
GREENLITE®-HS A high strength insulating firebrick
GREENTHERM 23 LI A 2300°F rated insulating firebrick
HARBIDE A silicon carbide brick English
HARWACO BOND (DRY) A 50% alumina, air setting, dry mortar English
HARWACO BOND (WET) A 50% alumina, air setting, wet mortar English
KALA® A 50% alumina brick
KRUZITE®-70 A 70% alumina brick
KX-99® A high fired, super duty fireclay 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
NARMAG® 95 CASTABLE A 95% magnesia castable English
NARMAG® CB MORTAR A chemically bonded, magnesia based mortar English
ON-LINE® 60 A 60% alumina, low-cement castable designed for rapid curing English
SHOT-TECH® 60Z A high alumina, low-cement, zirconia containing shotcrete mix English
SUPER NARMAG® B A 98% magnesia, burned brick
THOR® AZS-PT ADTECH® A 14% zirconia, pumpable, low moisture castable English
TUFSHOT® LI PLUS A fireclay based, conventional-cement, low iron gunning mix
UFALA® A 60% alumina brick shape English
ULTRA-GREEN® SR An 86% alumina, ultra-low cement castable English
VERSA-TECH 60G ON-LINE A 60% alumina, lower-cement, gunning mix English
VERSA-TECH 60G ON-LINE A 60% alumina, lower-cement, gunning mix English
VERSA-TECH 60G ON-LINE A 60% alumina, lower-cement, gunning mix English
VERSAFLOW® 45 C PLUS A coarse, fireclay-based, low-cement castable for high-abrasion environments
VERSAFLOW® 55/AR C PLUS A 55% alumina, coarse aggregate, low-cement castable English
VERSAFLOW® 60 PLUS A 60% alumina, low cement castable
VERSAFLOW® 80 C PLUS An 80% alumina, coarse aggregate, low-cement castable
VERSAGUN® 60 Z ADTECH® A high alumina, zirconia containing, low-cement gunning mix

Can’t find the product you’re looking for?

Contact an HWI expert to get the help you need >

Spotlight

  • Temporary Restraining Order at Windham Plant

    At HWI, it is our top priority to ensure the safety and well-being of every one of our more than 1,700 employees across all our locations. >
  • HWI to exhibit at GPC 2017

    HarbisonWalker International is excited to participate in the upcoming 78th Conference on Glass Problems in Columbus, OH, November 6-9, 2017. >
  • Union Strikes at Windham Facility

    The United Steelworkers International Union and its Local 8565-03 have rejected HWI's most recent contract offer and commenced an economic strike at its Windham, Ohio manufacturing facility at midnight September 30. >
  • New Plant Updates

    Visit our South Point Plant webpage to get the latest updates on the construction of our new plant. >