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Why are retorts more expensive to operate than continuous mercury furnaces?
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Mercury in the bulb of a thermometer.
Retorts are more expensive to operate than continuous mercury furnaces primarily due to the nature of their operation. While retorts are inexpensive to install, they function as batch operations that require the material to be manually charged and removed.1
In contrast, continuous furnacesāsuch as rotary or multiple-hearth furnacesāutilize mechanical feeding and discharge systems. This automation significantly lowers labor costs and reduces worker exposure to hazardous materials, including mercury vapors, sulfur dioxide fumes, and dust.1