Steel manufacturing sites
Illustrates the process from raw materials (e.g., iron ore) to finished steel products. Describes specific detectors designed to address hazards posed by the byproduct gases generated during each process.
Steel manufacturing sites (from raw material input to steel manufacture)
Overview of individual processes from raw material input to steel manufacture
Steel manufacturing processes generate combustible and toxic gas mixtures known as B gas, C gas, and LD gas.
>① Raw material input and treatment processes
>② Pig iron manufacturing process
>③ Steel manufacturing process
HazardsSince the mixed gas generated during the manufacturing process contains high concentrations of CO, H2, and CH4, it is necessary to be careful about leakage in terms of both toxic and combustible gas.
Raw material input and treatment processes
Iron ore and coal (coke), the major raw materials for iron, are transported by cargo ship.
The raw materials are treated before the pig iron manufacturing process to form sintered ore and coke.
HazardsThere is a risk of oxygen deficient atmospheres in enclosed spaces due to oxygen depletion caused by the oxidation of coal and iron ore, and examples of such spaces include ship holds. Precautions are also required to prevent even small leaks, as the COG produced in coking plants is both a combustible and toxic gas mixture.
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Fixed combustible gas detectors
Flame-proof Gas Detector
Model: SD-3
Flame detectors
Combustible Gas Detector
Model: GD-A80
For wearing by workers
Portable Gas Monitor
Model: 04 Series
Byproduct gas mixture
The byproduct gas produced inside steel manufacturing plants is mixed and used as a fuel to generate electricity.
POINTThe constituents of the byproduct gas mixture must be confirmed, as the types and ratios of which in the mixture differ depending on the specific plant and operating conditions.
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Ingredient confirmation
Explosion-proof Calorimeter
Model: OHC-800
Steel rolling process
The individual steel plates cut at the continuous casting facility undergo a range of processes to achieve the desired shapes.
Gas detectors are used in applications like these...
Fixed gas detectors are recommended for the following applications:
- ・ For checking the safety of work environments where workers are present
- ・ For checking safety in locations where gas may accumulate, such as pits and enclosed spaces
- ・ For detecting leaks from manufacturing plant and equipment
Portable gas detectors are recommended for the following applications:
- ・ For strengthening safety measures for workers
- ・ For managing safety using objective figures from checking for residual gas before maintenance and inspection work to confirming safety during work and checking sealing conditions on pipe unions
- ・ For identifying the locations of gas leaks if they occur