MUMBAI, India, Aug. 22 -- Intellectual Property India has published a patent application (202421011165 A) filed by Jsw Steel Limited, Maharashtra, on Feb. 17, 2024, for 'a method for controlling blast furnace (bf) hot blast stove operation to minimise bf gas consumption to maintain required hot blast temperature (hbt).'
Inventor(s) include Mrunmaya Kumar Pasupalak; Subrata Kumar Chowdhury; Rajesh Anand; Ningappa Kumbar; Indira Savanur; Naveen Singh; Rameshwar Sah; Prabhakar Dasu; Awnoory Srinivas Rao; and Lokendraraj Singh.
The application for the patent was published on Aug. 22, under issue no. 34/2025.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method of controlling Blast Furnace (BF) hot blast stoves operation using only BF gas to maintain Hot Blast Temperature (HBT) of 1150 - 1200 C.This novel method of heating BF hot blast stoves involves the development of a heating control model based on the fundamental empirical equations and mass & energy balance,that calculates and predicts the amount of BF gas required by stove to produce the hot blast air having temperature in the range of 1150 - 1200 C. Depending on the volume of BF gas required calculated by the model, the position of the valve will be determined for maximum heat utilization vis-a-vis minimum heat loss. The precise valve positioning helps to minimise blast furnace gas consumption during 'On Gas' phase. The new system has helped to reduce BF gas consumption in each stove by 8,000 Nm3/hr from 57,500 Nm3/hr without any detrimental effect on HBT. It improved health of stoves due to lower fluctuations in gas flow and On-gas/On-blast cycle time, avoiding manual interventions and reduced BF gas consumption and thereby ~30 kg/thm CO2 emission reduction."
Disclaimer: Curated by HT Syndication.
