Abanaki offers industrial wastewater skimmers specially designed for steel mills where plant maintenance engineers are looking for the lowest cost, most reliable method of removing greases and heavy oils from the steel-mill scale pit. Abanaki oil skimmers use the difference in specific gravity and surface tension between grease and water, allowing the belt to attract grease and oil as the belt passes through the surface of the water. The simple belt-and-motor approach is proven to operate unattended and reliably for decades with little maintenance.

Grease Grabber Oil Skimmer

To avoid fines from government and municipal sewer districts, steel mills must limit the amount of grease in wastewater discharged into the environment. The Grease Grabber® oil and grease skimmer provides a continuously operating belt and wiper that can remove up to 160 gallons per hour of heavy greases and oils. Depending on the characteristics of the liquid, the oil/grease skimmer is capable of reducing grease content to fewer than five parts-per-million in water. Reclaimed grease and oil can be re-used or used as furnace fuel, avoiding sucker truck disposal costs.

How Grease Skimmer Works?

Using a double drive roller and tail pulley system, the grease skimmer belt runs through wastewater to pick up grease and heavy oil from the surface. The belt travels over the head pulley and then passes through tandem wiper blades, from which oil is scraped off both sides and discharged. A heated hopper keeps grease flowing in cold outdoor temperatures.

The tail pulley features flanges that allow the pulley to roll freely on the inside of the belt without becoming dislodged in turbulent applications. No bearings are needed; the unit does not need to be fastened to the tank. An optional tether and cage assembly is offered to prevent the tail pulley from being dislodged. The Grease Grabber oil skimmer can be used in pits with depths as shallow as one foot or as deep as 100 feet.

To learn more about oil skimmers, please contact our experts at 440-543-7400 or visit our website: www.abanaki.com

Abanaki Model 8 Belt Skimmer in Operation

There is likely no larger industrial meeting place for oil and water than a steel mill. Because of the massive amount of water that is needed for process cooling and descaling, and the similar quantity of hydraulic, lubricating, and cooling oils that are required in steel production, the adage that oil and water do not mix is put to the test and proven every day.

Oil contamination in steel mills process water

It can take between 10,000-75,000 gallons of water to produce one ton of steel, depending on the amount of recycled water that is used. Reusing water whenever possible is crucial to maintaining costs, and to be able to reuse water in the majority of steel mill processes it needs to be free of contamination, namely oil.

Tramp oils commonly contaminate steel mill process water and this can lead to a variety of problems. Water purity is obviously affected which means that the effectiveness of this water in its role as a coolant or lubricant is reduced. Additionally, water that is contaminated with oil cannot be discharged into a facility’s wastewater system, as this can potentially cause a hazard to the environment. Finally, the presence of some oils in water can provide an ideal media for bacteria growth that can present unsafe working conditions for workers. All of these factors contribute to a mill not being able to recycle water, which means increased production costs.

Abanaki Model 8 Oil Skimmer

What counter measures can be employed at a steel mill to limit or eliminate process water from becoming contaminated with oil? For one, the Abanaki Model 8 Belt Oil Skimmer is a dependable and effective means of removing oil from water and water-base solutions, such as those found in mills. Oil skimming makes use of the differences in specific gravity and surface tension between oil and water. These physical characteristics allow the belt skimmer to attract oil and other hydrocarbon liquids from the surface of the fluid.

Depending on the characteristics of the liquid, it is possible for the Model 8 to reduce oil content to less than five parts per million in water. It utilizes a continuous belt and wiper to remove up to 40 gallons of oil per hour from the fluid surface. The unit can be used as a pre-treatment before filtration, and in conjunction with coalescing systems. The versatility of the Model 8 allows it to be used in a wide array of applications in addition to steel mills, such as:

• Wastewater sumps
• Parts washers
• Coolant systems
• Heat treating fluids
• Food processing plants
• Parking lots, garages, and service facilities
• Outdoor ponds, lakes, and basins
• Underground tanks
• Ships' bilges
• Aircraft service areas and tarmac runoff
• Truck, locomotive, and other mobile equipment washing facilities

Abanaki Model 8 Oil Skimmer Specifications

The Model 8 can be used in tanks with depths as shallow as one foot, or as deep as 100 feet, and is built to last. With the proper configuration it can handle liquid temperatures up to 212°F, and the pH of the fluid can range from 3 to 13. The skimmer drive includes an oil filled gear reducer with bronze gears and ball bearings. The motor, reducer, and powder coated finish of the housing give the Model 8 exceptionally long life, even under the harshest conditions.

For more information about the Model 8 or other Abanaki products, call your sales representative at (440) 543-7400, or simply click at the button below.

The relationship between oil and water in a mixture is well-known and governed by two physical properties:

• Specific Gravity: Most hydrocarbons have a lower specific gravity than water. Without agitation, oil separates from the water and floats to the surface. These oils are known as LNAPL’s, Light Non-Aqueous Phase Liquid. Oils (and other components) that sink in water have a higher specific gravity and are known as DNAPL’s, Dense Non-Aqueous Phase Liquid.
• Surface Tension and Affinity: Normally, oil bonds more tightly to itself and other materials than to water. This affinity, and differences in surface tension between oil and water, cause oils to adhere to a skimming medium.

Although designs vary, all oil skimmers rely on specific gravity, surface tension and a moving medium to remove floating oil from a fluid’s surface.

Find out more about the 9 typical applications for Industrial oil skimmers by clicking the button below.

The wastewater pits in Steel Mills are a particularly harsh place for oil skimmers to operate. The heavy oils and greases that are typically found in the scale-pits can wear out an oil skimmer if the right skimmer and belt material is not being used.