Improvements in Obtaining Gold and Silver from Ores, Mattes, or other Compounds.
Year: 1894

page_text: Date of Application, 28th May, 1894
Complete Specification Left, 20th Feb., 1895-Accepted, 30th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Obtaining Gold and Silver from Ores, Mattes, or
other Compounds.
I, GEORGE THOMSON, Manager of The New Jersey Metal Refining Works,
Elizabeth, New Jersey, in the United States of America, do hereby declare the
nature of this invention to be as follows, that is to say :-
My said invention has for its object the obtaining of gold and silver from ores,
mattes, or other compounds, in an improved, simple, and economical manner.
In carrying out my invention in the case of ores or compounds containing
sulphur, the ores or compounds, in a crushed or ground state, are first subjected to
ordinary calcining processes in order to drive off the sulphur as completely as
conveniently practicable. The preliminary calcination is not required if sulphur
is absent from the ores or compounds operated on.
The ores or compounds being brought to and maintained at a strong red heat in
an ordinary calcining or other suitable furnace, have added to them a chloride
which is preferably hydrochloric acid or an alkali chloride with sulphuric acid,
whereupon the gold and silver become volatilised, probably as chlorides, and can
be recovered partly as deposits in the flues proceeding from the furnace and partly
by means of condensing apparatus. Any suitable known condensing apparatus
working with water or other liquid and such as is employed for condensing metallic
fumes may be used, the volatilised substances being passed through at least two
condensers in succession, of which the first may contain water, whilst the second
should contain dilute nitric acid to insure the retention of any silver which might
otherwise pass through as chloride. In the first condenser I add a small proportion
of protosulphate of iron to cause the separation of gold in the metallic form.
My improved process is advantageously applicable with ores or compounds
containing copper as well as with other ores or compounds.
Dated this Twenty fifth day of Mon 1004
EDMUND HUNT,
Applicant's Agent.
Improvements in Obtaining Gold and Silver from Ores, Mattes, or
other Compounds.
I, GEORGE THOMSON, Manager of The New Jersey Metal Refining Works,
Elizabeth, New Jersey, in the United States of America, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement, that is
to say:
My said invention has for its object the obtaining of gold and silver from ores,
mattes, or other compounds, in an improved simple and economical manner.
In carrying out my invention in the case of ores or compounds containing
sulphur, the ores or compounds, in a crushed or ground state, are first subjected to
ordinary calcining processes in order to drive off the sulphur as completely as.
Price 8dl

page_text: conveniently practicable. The preliminary calcination is not required if sulphur
is absent from the ores or compounds operated on..
The ores or compounds being brought to and maintained at a strong red heat in
an ordinary calcining or other suitable furnace, have added to them a chloride
which is preferably hydrochloric acid or an alkali chloride with sulphuric acid,
whereupon the gold and silver become volatilised, probably as chlorides, and can
be recovered partly as deposits in the flues proceeding from the furnace and partly
by means of condensing apparatus. Any suitable known condensing apparatus
working with water or other liquid and such as is employed for condensing metallic
fumes may be used, the volatilised substances being passed through at least two
condensers in succession, of which the first may contain water, whilst the second
should contain dilute nitric acid to insure the retention of any silver which might
otherwise pass through as chloride. In the first condenser I add a small proportion
of protosulphate of iron to cause the separation of gold in the metallic form.
My improved process is advantageously applicable with ores or compounds
containing copper as well as with other ores or compounds..
•
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
The obtaining of gold and silver from ores, mattes, for other compounds, by
treating the same with a chloride, volatilising, and recovering the metals from the
fumes, substantially as hereinbefore described.
Dated this Nineteenth day of February 1895.
EDMUND HUNT,
Applicant's Agent.