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FPI Solution: Steel Making Process and Detection of Its Process Gas

FPI Solution Introduction

Application Area: Iron & Steel Industry

Process: Steel Making

Measuring Components:O2, CO

Application Scenario:

Steel making process involves converting liquid iron into steel via a basic oxygen furnace (BOF, also known as a converter) or melting scrap steel and/or direct reduced iron (DRI) in an electric arc furnace (EAF).

Recovery of BOF gas is the single most energy-saving improvement in the BOF process, making it a net energy producer. The BOF gas containing approximately 70-80% carbon monoxide(CO) is usually recovered in a gas holder for future use.

On-line instruments especially exhaust gas monitors, are used to optimize the operations of an EAF. Benefits of it include reduced electricity consumption, shorter power-on times, increased productivity, decreased production costs, reduced electrode consumption, reduced natural gas, oxygen, and carbon consumption, and reduced refractory wear.

Critical Control of Process Gas

Recovering or discharging (if low CO concentration) of the BOF gas is determined by measurement value of CO, O2 concentration. Optimizing the process of BOF or EAF also requires constituents detection of the post-combustion off-gas.

Challenge of Instrumentation

Conventional paramagnetic analyzer used for converter gas recovery is slow responding due to sampling system. Time delay means a waste of fuel resources.

FPI's Solution

The high-speed response of the LGA helps raise BOF gas recovery rate by 3-5%. The maintenance-free of the LGA itself means no interference to the recovery process, an additional benefit for higher recovery rate and lower operation cost. The monitored data can also be used as input into models of the BOF or EAF process which can help to improve understanding and to optimize the process.

LGA-4100 Laser Gas Analyzer

Based on the Tunable Diode Laser (TDLS) technology, LGA-4000 is a highly reliable laser gas analysis system that monitors various toxic and hazardous substances (HF, NH3, H2S, HCl) from stack emission with high accuracy, strong reliability and is virtually maintenance-free.

If any interests in these products, please feel free to visit FPI's official online store: online.fpi-inc.com/

Application Data

Details

  • Hangzhou, Zhejiang, China
  • Focused Photonics Inc.

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