File:Report of the State Mineralogist (1892) (14802521613).jpg

Identifier: reportofstatemin17cali (find matches)
Title: Report of the State Mineralogist
Year: 1892 (1890s)
Authors: California State Mining Bureau
Subjects: Mines and mineral resources Gold mines and mining Mineralogy
Publisher: Sacramento : California State Mining Bureau
Contributing Library: University of California, Davis Libraries
Digitizing Sponsor: University of California, Davis Libraries

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t Scott furnace at present in operation.The ore is crushed to pass a 2-inch ring; and is transported from the crusher bins, byan inclined belt-conveyor, discharging directly into the top of the furnace. The sidewalls of the furnace are built up several feet above the level of the throat, thusgiving an auxiliary ore-bin and providing an automatic furnace-feed. There are eight new condensing chambers connected with this furnace, arranged ina double row. The first chamber in each row is of concrete, and the other three areof tongue and groove redwood, built rectangular. A 3-foot redwood-stave flue con-nects the last of this series of condensers to the first circular wooden condenser of theHerreschoff series. Crude oil is used for fuel. Concentration. Both table concentration and flotation were tried in 1916-1917, butwere discontinued in September, 1917. In June, 1916, a concentration Zanders, W. H., The smelting of mercury ores: Eng. & Ivlin. Jour., vol. 102, p 634Oct. 7, 1916. I. et
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E^^feW§ 222 MINES AND MINERAL RESOURCES. plant consisting of a ball-mill and a Deister-Overstrom table was inoperation at the old Randol dump, but later moved to another part ofthe property, as the quicksilver values in the dump material werespotted and too lowfor commercial work. On June 15th, with theplant running smoothly and apparently doing good work, samplestaken every half-hour for 5 hours assayed as follows: Heads 0.03%mercury; tails 0.015%; middlings 0.03%; concentrates 1.16%. Theore treated in the 5 hours amounted to 20 cars of 15J cu. ft. each.There was occasionally a very little native quicksilver, which was caughtby amalgamation on a piece of tin at the concentrate-discharge endof the table. : ; : ) * * j-Tfcime! .V ■f< V&<& YM *^n W- ~m

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