K061 Electric Arc Furnace Dust
Hazardous Dust (including K061) Treatment Process
When Hazardous Dust (including K061) is delivered to MAX’s Yukon Facility, the company reviews the paperwork thoroughly. MAX then collects a sample of the material and compares it with the pre-established criteria/characteristics for the specific waste.
MAX then encloses the unloading hopper inside the CAP Building, which has a dust collection system (baghouse). The silos each have separate bin vent dust collection systems, and the mixers have weight cell-mounted receiving hoppers, which charge the mixer by gravity. Each receiving hopper is connected to a dust collector. All the collected dust discharges back into the unit which from which the dust was collected. Lime and other dusty treatment chemicals are managed in a similar fashion.
If the delivery is by dump truck, the truck will be unloaded through a grate into the primary receiving hopper. The grate will remove liner plastic and oversized materials. MAX will then move the dust pneumatically from the hopper to either a storage silo, or to the treatment mixer. Pneumatic transfer trucks will be unloaded directly into the storage silos or the treatment mixer.
Mixing, Testing & Disposal
Once the mixer is loaded with untreated hazardous dust, the dust is mixed thoroughly.
MAX determines the treatment chemical recipe based on the chemical
composition of the waste stream. MAX then adds treatment re-agents and
continues mixing until the waste mass and treatment chemicals are
homogenous.
The U.S. EPA and PADEP require MAX to meet the most stringent standards for leachable metals that have been developed for any K061delisting. After MAX has completed mixing the dust with treatment chemicals, samples are collected for laboratory analysis. MAX performs three extraction and analytical procedure: TCLP, AMTM, and a PHL12.0. These tests assure that the treated waste is stable in acidic, neutral, or base environmental conditions.
The
mixer sits on an elevated platform over a roll-off storage container.
Empty roll-off boxes are placed under the mixer prior to loading the
mixer. When batch treatment is complete, the mixer releases the treated waste directly into a lined roll-off container.
A truck then removes the container and places it into one of MAX’s five
bonded and permitted container storage areas. The container will remain in storage until laboratory confirmation of the treatment effectiveness is completed.
MAX requires that the analytical data is recorded for each waste
stream. Two signatures from laboratory and plant management are
required to release the treated waste for disposal.
Following MAX managment approval, the batch is released from storage for disposal.