D Retort and Condensing System

D Retort and Condensing System (HMXNQ)

Location: San Jose, CA 95120 Santa Clara County
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Country: United States of America
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N 37° 10.402', W 121° 49.576'

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The D retort, line the rotary furnace, was used to recover mercury from cinnabar ore. Whereas the rotary furnace was a continuously-operating system, the D retort was loaded with ore, fired for a period of time (usually 8 to 24 hours), then allowed to cool before emptying the burnt ore (calcines) and recharging with more ore. Burning fuel in a fire box under the retort heated [the] ore to dissociation temperature (1095 degrees F). Vapors driven from the ore by heat, including mercury, sulphur [sic], and water vapor, were condensed in external air-cooled or water-cooled metal pipes attached to the top of the retort.

The retort was most often used to process relatively small amounts of ore and to perform a second processing of calcines and dust from the rotary furnace.

This retort and condenser were used in the Guadalupe mine from 194-s until the mine closed in the 1970s. The Guadalupe Rubbish Company donated the D retort to NAQCPA in 1987.
Series This marker is part of the Daughters of the American Revolution series
Year Placed2011
Placed ByThe California State Society, Daughters of the American Revolution and New Almaden Quicksilver County Park Association
Marker ConditionNo reports yet
Date Added Wednesday, October 1st, 2014 at 6:34am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10S E 604198 N 4114749
Decimal Degrees37.17336667, -121.82626667
Degrees and Decimal MinutesN 37° 10.402', W 121° 49.576'
Degrees, Minutes and Seconds37° 10' 24.12" N, 121° 49' 34.56" W
Driving DirectionsGoogle Maps
Area Code(s)408
Closest Postal AddressAt or near 3535 Deep Gulch Trail, San Jose CA 95120, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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