Turning iron ore into high-quality DRI with rotary kiln technology

Conserve energy and increase efficiency

DRI kiln known as Direct Reduced Iron kiln by Thermal Systems, is a type of kiln used in the production of sponge iron. In this process, iron ore is reduced to iron in a reactor vessel, using reducing gases like hydrogen or carbon monoxide. The heat generated during this process can be recovered and used in boilers to produce steam, which can be used for power generation or industrial processes. Thermal System's DRI kiln for heat recovery in boilers is a way to conserve energy and increase efficiency in the production of sponge iron.

DRI kilns (direct reduced iron kiln) are manufactured at Thermal Systems using rotary kiln technology, which involves heating iron ore in the absence of oxygen to remove impurities and reduce it to its metallic form. The process takes place in a rotating cylindrical kiln that is heated by a reducing gas, such as natural gas or coal, to a temperature of around 900-1100°C. The resulting DRI is a highly pure form of iron that can be used as a raw material in steel production.





PRESSURE (kg/cm2)





Thermal Systems provides effiicient Waste Heat Recovery Boilers at the exhaust of the DRI Kilns in the Sponge Iron Plant

  • WHRBs for 1250+ TPD Kiln Capacity

  • Natural & Forced Circulation Design

  • Inline & Offset design suitable for existing plant layout

  • Vertical / Horizontal Water- Tube Boiler

  • Cleaning mechanism with provision for dust removal

  • WHRB on Turnkey basis including extended BOPs

India's Largest installation of WHB for 1250 TPD DRI Kiln for Sponge Iron Plant.


Direct reduced iron (DRI) is also known as sponge iron. It is produced by the reduction of iron ore by non- coking coal in a rotary kiln, thereby generating hot flue gases.

TSPL provides WHBs to recover heat from hot kiln gases, thereby generating HP Steam which is in turn used for generating power

Waste Heat Recovery Solutions for Coke Oven Batteries