Steps in The Process
- Both boiler types have a solid base with an orifice that can be opened to permit the molten ash that has collected at the base to flow into the ash hopper below.
- The ash hopper in wet-bottom furnaces contains quenching water.
- When the molten slag comes in contact with the quenching water, it fractures instantly, crystallizes, and forms pellets.
- The resulting boiler slag, often referred to as “black beauty,” is a coarse, hard, black, angular, glassy material.
- At intervals, high-pressure water jets wash the boiler slag from the hopper pit into a sluiceway which is then conveys it to a collection basin for dewatering, possible crushing or screening, and either disposal or reuse.
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