Beltran's advanced Wet Electrostatic Precipitators (WESPs) meet the complex needs of iron and steel producers with superior performance and economy.

Iron and steel plant operators throughout the world are increasingly turning to advanced exhaust gas recovery systems to hold down energy-related operating costs and meet stricter environmental regulations. Modern recovery systems capture gases emitted by coke ovens, blast furnaces, oxygen furnaces and sintering plants, then filter or scrub them to eliminate pollutants and impurities, and finally burn the cleaned gases to produce supplemental electric power.

Beltran Technologies designs and manufactures a variety of emission control equipment, especially its flagship Wet Electrostatic Precipitator (WESP), that can vastly improve the performance and efficiency of modern gas cleaning and recovery systems. The Beltran WESP uses uniquely designed ionizing rods and charged collection tubes to capture a wide range of undesirable gas stream components (particulates, acid aerosols, organic compounds, etc.) down to submicron-level diameters, at approximately 99.9% efficiency and with minimal pressure drops. The wet collection surface prevents re-entrainment of particles and facilitates clean, safe handling of waste slurry, with minimal energy penalty compared to other methods.

The Growing Need for Steel Demands Better Ways to Control Pollutants

The integrated iron and steel industry encompasses several interrelated industrial processes, and thus a wide range of emission types requiring prevention and/or control.

Coke oven batteries are one of the main sources of air pollutants in steel making. Pulverized coal is superheated to produce coke, a solid carbon material used as both a heat source for melting iron ore, and as a carbon source for steel conversion. Coke oven gas emissions include, ammonia, oily aerosols, sulfuric acids, coke dust and VOCs (e.g. naphthalene benzene, butane, butylene, ethane, ethylene, hydrogen cyanide, methane, propane, propylene, toluene and xylene).

In blast furnaces, iron ore, coke, heated air and limestone flux are combusted, producing large volumes of particulates, sulfur dioxide and hydrogen sulfide. Heavy metals released from the iron ore (cadmium, chromium, lead, manganese, nickel.) are also a major emission component. In the actual steel making phase, LD, or converter, gas emitted by the basic oxygen steel furnace must cleaned of high levels of particulates, heavy metals, sulfuric acid mists and condensed organics.
Sintering operations, which recover and agglomerate fine particles of coke dust and byproducts under heat and pressure, and then recycle them back to the blast furnaces, often have problems with hazardous organic and heavy metals. Secondary sources of hazardous air pollutants include scarfing operations (fine metal particulates), pickling in hydrochloric acid (HCl emissions), and coating (chlorine, cyanide, and ethylene glycol emissions).

In the energy-hungry steel making industry, operators do recover some exhaust gases for ancillary power generation. However, whether the source is an on-premises boiler, or a central station miles away, the incessant demand for power generation drives increasing emissions of pollutants related to those activities.

Beltran systems, including our Wet and Poly-Stage Precipitators and Flume Coalescers, offer flexible, reliable, economical solutions for the pollution control needs of this complex industry. We back up our equipment with services that include project evaluation, customized research, design, engineering, fabrication, installation and testing.