Air and water pollution control solutions for steel and metal production

Environmental Solutions for the Steel Industry

Water, wastewater, and air pollution control systems for steel and metal production

Environmental Solutions for the Steel Industry

Water, wastewater, and air pollution control systems for steel and metal production

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Monroe Environmental provides custom engineered environmental solutions for a variety of steel industry and metal production processes. Our solutions are cost effective and of the highest quality for heavy-duty operations. Monroe has an impressive client list and a wealth of application experience within the industry, including pollution control systems for mills, mini-mills, smelters, casters, picklers, galvanizers, heat treaters, and many others.

We understand the unique challenges that steel producers and metal refiners face due to competitive forces, aging infrastructure, and strict environmental regulations. Our engineers assist with providing reliable environmental solutions by adapting trusted engineering principles to the specific treatment needs and process requirements of each plant and application.

Air Pollution Control

  • Acid & alkaline gasses & fumes – NH3, H2S, HCl, SO2, NaOH, HNO3
  • Particulate matter – PM10 & PM2.5
  • Condensables & aerosols
  • Opacity reduction
  • VOCs & odor control
  • Dry & wet dust collection
  • Oil mist collection
  • Rolling mill & coil line exhaust
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Water & Wastewater Treatment

  • Clarification & separation

    • Suspended solids (TSS)
    • Dissolved solids (TDS)
    • Metals precipitation
    • Oil separation & recovery
    • Oil skimming & reclamation
  • Sludge thickening
  • Ammonia & VOC reduction
  • Mobile water treatment
  • Blast furnace scrubber water treatment
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Steel Industry Experience: Representative Projects and Systems

46 ft. diameter self-supporting Circular Thickener for separating blast furnace scrubber fines from wastewater at a steel processing plant

Circular Clarifier to remove TSS/fines from blast furnace scrubber wastewater. The 46 ft. diameter clarifier was elevated on legs for ease of access to sludge piping, and was designed to handle a 2,000 GPM max flow.

Multi-Stage Mist Collector for steel rolling mills

Multi-Stage Oil Mist Collectors to exhaust rolling mills for steel plant expansion. The mills were required to meet new PM limits for filterable and condensable particulate. For condensable PM filtration, the system included a cooling coil/heat exchanger with chiller and pump skid. The Monroe Collectors feature up-flow filtration and slower filter velocities which prolong filter life and maximize efficiency. Read More

900 GPM API Separator for oil water separation

900 GPM API Separator for free oil separation prior to a DAF. The system featured inlet diffusion reaction jet baffles, chain & flight conveyor, and customized oil skimming system with collection beach & auger trough.

Circular Clarifier for the clarification and thickening of the blast furnace scrubber wastewater

100 ft. diameter high-torque Thickener Clarifier treating blast furnace scrubber blowdown. The system included an inlet well flocculator, 500,000 ft·lbs drive torque rating, PLC controls, redundant sludge pumps, and a 15 mg/l effluent TSS and 5% solids underflow performance guarantee. Read More

Venturi Scrubber for metal die casting

25,000 CFM Venturi Scrubber for aluminum parts manufacturer. Upgrade to the air pollution control system to more effectively capture and remove lubricant mist, particulate, and fumes from their die casting process. Read More

solids separator clarifier with drag conveyor

Drag tank for mill scale separation for steel tube mill. Chain and flight drag conveyor to capture and remove solids from mill water and a tube skimmer to remove floating oil. The system is rated for 660 GPM. Read More

Circular Clarifier for oil water separation

Circular Oil Water Separator for primary treatment of waste oils and solids at a steel mill. The 50 ft. diameter clarifier was designed with low sidewater depth, inlet diffusion, and multiple skimming arms & collection troughs.

wet scrubber for steel plant

5,000 ACFM Packed Tower Scrubbing System to control HCl fumes from the pickling acid storage tank farm at a steel plant. Scrubber, fan, and discharge stack were constructed from FRP. Monroe also designed the tank farm ductwork and provided instrumentation and controls.

Cyclonic Dust Collector for dust collection of scale and steel fines from grinding operations

10,000 CFM Dust Collector Cyclone to remove scale and steel fines from grinding operations at a steel plant. System design included ceramic lining for abrasion resistance, 90% alumina ceramic tiles, and cone hopper w/ rotary airlock.

Belt Skimmers for oil recovery from wastewater

Monroe 8A Belt Skimmers for oil recovery from wastewater tanks at a steel mill. The custom thermoplastic belts are rated to withstand 180°F liquid temperatures.

Horizontal Plate Clarifier to remove TSS from pickling wastewater.

40 GPM Horizontal Plate Clarifier to remove TSS from pickling wastewater prior to membrane filtration. The polypropylene clarifier was equipped with chemical mixers, HDPE separation plates, and surface oil skimmer.

Lamella Plate Vertical Clarifier for treating metal finishing wastewater

Lamella Plate Vertical Clarifier to remove iron and nickel hydroxides from metal finishing wastewater. The 1,533 GPM unit was constructed of 304 SS, equipped with flash mixing and flocculation tanks, and provided over 3,900 ft2 of settling area.