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 Circular kilns

A circular kiln is an industrial furnace, wh ere products are heated on a rotary hearth.

Circular kilns are mainly used for heating blanks during tube rolling, wheels, and the kiln tyres of the rolling stock for thermal treatment of metal products as well as for heating non-ferrous blanks prior to rolling.

A circular kiln consists of a rotary hearth and an arched immobile ring-shaped channel. The blanks are positioned on a flat hearth by using pits. These places concentrate thermomechanical stress resulting in destruction of the pits and uneven heating of blanks. Therefore, all used materials shall have considerable abrasion resistance and small-case thermal expansion.

Our lining systems guarantee quick and easy installation, good heat insulation, and overall savings on power costs. The wide range of heat insulation materials allows us to perform successful repairs on circular kilns.

The furnace flat hearth lining is multi-layered:

  • Calcium silicate slab CERABOARD SILICATE 1000, CERABOARD SILICATE 1100.
  • Insulation concretes of such brands as CERALIT LWCAST CR27060, CERALIT LWCAST CR40059, CERALIT CAST CL45134.
  • Working layer CERALIT CAST KL79047.

Finished products can be manufactured for the kiln working layer lining.

The furnace wall lining is multi-layered:

  • Calcium silicate slab CERABOARD SILICATE 1000, CERABOARD SILICATE 1100.
  • Insulation bricks of such brands as FL 26-08, FL 24-06.
  • Working layer: gunned castable CERALIT GUN HK70070, CERALT GUN CR57009 or blown-in concrete CERALIT CAST HL60140.
  • Tamping of burner tunnels is provided with plastic mixture CERALIT PLAST BK70008.

The furnace roof lining is multi-layered: 

  • Insulation layer: ceramic fiber CERAWOOL, insulation concrete CERALIT LWCAST VR32026.
  • Working layer: concrete CERALIT CAST HL60140, CERALIT LWCAST CR40059.

The lining of the gas duct, recuperator, and chimney stack are made of various lightweight gunned castables, as well as insulation fire-clay grog concretes.