APAKAH MAKSUD CUPELLATION dalam CORSICA?
Cupellation
Cupellation adalah proses penapisan dalam metalurgi, di mana bijih atau logam aloi diperlakukan di bawah suhu tinggi dan operasi terkawal untuk memisahkan logam mulia, seperti emas dan perak, dari logam asas seperti plumbum, tembaga, zink, arsenik, antimoni atau bismut, yang terdapat di dalam bijih. Proses ini didasarkan pada prinsip bahawa logam berharga tidak mengoksida atau bertindak balas secara kimia, tidak seperti logam asas; jadi apabila ia dipanaskan pada suhu tinggi, logam berharga tetap terpisah dan yang lain bereaksi membentuk slag atau sebatian lain. Sejak Zaman Gangsa Awal, proses itu digunakan untuk mendapatkan perak dari bijih timah peleburan. Menjelang Abad Pertengahan dan Renaissance, cupellation adalah salah satu proses yang paling biasa untuk penapisan logam berharga. Pada masa itu, ujian kebakaran digunakan untuk menguji mineral, iaitu menguji logam segar seperti logam plumbum dan kitar semula untuk mengetahui kesucian mereka untuk pembuatan barang kemas dan duit syiling. Cupellation masih digunakan hari ini.
Definisi cupellation dalam kamus Corsica
Pengertian cupellation dalam kamus adalah proses pemulihan logam berharga dari plumbum dengan mencairkan aloi di dalam cupel dan mengoksidakan plumbum dengan menggunakan letupan udara. Takrifan lain dari cupellation ialah pembuatan oksida plumbum dengan peleburan dan pengoksidaan.
CORSICA BUKU YANG BERKAIT DENGAN «CUPELLATION»
Ketahui penggunaan
cupellation dalam pilihan bibliografi berikut. Buku yang berkait dengan
cupellation dan ekstrak ringkas dari yang sama untuk menyediakan konteks penggunaannya dalam kesusasteraan Corsica.
1
Studies in Ancient Technology
There are several references to the "fining pot" (cupel) in the Bible (227) or to the
dross obtained in cupellation (228), to cupellation furnaces (229) and to the
bellows used (230). If we want to find out when this cupellation was discovered,
we ...
2
Mineral Processing Plant Design, Practice and Control
Fire Assay Cupellation The lead button obtained from the crucible fusion or
scorification is treated by a process called cupcllation to separate the noble
metals from the lead This consists of an oxidizing fusion in a porous vessel called
a cupel.
Andrew L. Mular, Doug N. Halbe, Derek J. Barrett,
2002
3
The Science and Archaeology of Materials: An Investigation ...
The gold could be removed and the silver recovered by cupellation. Touchstones
could be used to test the purity of the metal (Oddy 1986 and 1993). Bayley (1991)
has recognised the presence of parting vessels from Roman, Anglo-Saxon ...
4
Mining and Engineering World
Cupellation. of. Telluride. Ores-II. Current Literature on Mining and Kindred
Subjects Articles mentioned without. As one example taken from many results, 50
grms. of an alloy containing 0.1470% of gold, about 0.03% of silver and 0.23% of
...
5
The Sampling and Assay of the Precious Metals: Comprising ...
The results of the most recent attempts that have been made to measure the
temperature of muffles during cupellation and also the actual temperature of
cupellation are briefly summarised as follows. The most complete and probably
the most ...
Ernest Alfred Smith,
1913
THE ERRORS IN GOLD ASSAYING. Bulletin No. 253, United States Geological
Survey. By W. F. Hillebrand and E. T. Allen. Cupellation Losses. Silver losses in
cupellation have been pretty well known and worked out, but owing possibly to ...
7
The American Journal of Science and Arts
... specific gravity of steam. In addition to these, many resolutions were passed,
involving applications to the government and other public bodies ; and various
scientific researches were also recommended. Art. IX. — On Cupellation, an easy
, ...
8
Effects of Copper on the
Cupellation of Silver
"The object of this work is to find the effect of copper in the cupellation of silver.
9
Engineering and Mining Journal
The lead bullion is dipped from the lead well and cast into bars weighing
approximately 27 lb. each. The cupellation of the lead bullion is carried on in a
single English cupellation furnace of usual pattern, using crude oil as a fuel. The
furnace ...
10
The Engineering and Mining Journal Vol 88 No 1
SL'MMARY OF TEMPERATURE CHANGES. . I Between I Effect of Introduc- ,
Continua- I i Top and O ening tion and Commence- tion 01 Comparison 1 Bottom
at .\ uflie, Melting ment of Cupellation, With Initial End 016 1 Min. of Pb.
Cupellation.
BARANGAN BERITA YANG TERMASUK TERMA «CUPELLATION»
Ketahui apa yang diterbitkan oleh akhbar nasional dan antarabangsa dan cara istilah
cupellation digunakan dalam konteks perkara berita berikut.
Second Thoughts On US Official Gold Reserve Audits
Raw precious metals (bullion) are assayed by an assay office. Silver is assayed by titration, gold by cupellation and platinum by inductively ... «Gold Seek, Feb 15»
Great Aspirations of the Iron Age
The coast of southeastern Spain was rich in lead, a substance vital to the silver-smelting process known as cupellation, and two different ... «AINA, Dis 14»
High Performance Recovery of Precious Metals
... competitive advantage over alternative methods of obtaining precious metals, including cupellation, hydrometallurgical leaching and thermal ... «Azom.com, Apr 14»
Soil Science: ALS Minerals tests samples to find minerals
The lead button is heated up again in a process called cupellation, where the precious metal (silver and gold) are separated from other metals. «Elko Daily Free Press, Apr 14»
Facts Abou . . .
They heated the silver ore and blew air over it, a process called cupellation. The silver does not react to the air, but the base metals such as ... «LiveScience.com, Mei 13»
Yemen toy market poses danger
... steamtight uneconomic slatier webfoot expertised dikaryon cupellation neomenian sourtop antarchism spacewalker inclamation parallelising ... «The Yemen Times, Sep 12»
Introduction to Gold Assaying: What's in a Gold Grade?
If the assay is performed on the ore materials using fusion and followed by cupellation separation, detection of mineralization may be in parts ... «Gold Investing News, Mei 11»
TIMELINE - A brief history of silver
2500 BC: The ancient Chaldeans (modern-day Turkey) created a 'cupellation' process to extract silver from lead-silver ores in the first ... «Reuters India, Apr 11»
Furnaces From Carbolite For The Precious Metals Industry, Crucible …
Furnaces From Carbolite For The Precious Metals Industry, Crucible Furnaces, Cupellation Furnaces, Assay Furnaces and Gold Melting ... «Azom.com, Apr 07»
Christopher Columbus's Failed Outpost The First European Colony …
... ore were novices at the task, substituting beach sand for the necessary bone ash in the cupellation process. Finally, most of the galena ore lies unprocessed. «About - News & Issues, Apr 07»