The Placer herald., 1872-01-20

MY Invention rela'eS 10 an improved
method and process of treating ores and sui
phurets which contain the precious metals,
for the purpose of desulphu,izng and disin
tegrating them in order to render them capa-
bic of being easily separated and to render
the metals contained in them capable of
amalgamation and extraction.
do hereby declare the following descrip-
ton and accompanying diagram are sufficient
to enable any person skilled in the art or
science to which it most nearly appertans, to
make aud use my said invention or improve
ments, without further invention or expert
ment.
Ny process is particularly adapted to that
class of ores known as rebcllious ores, which
cannot be worked in the ordinary manner,
owing to The peculiar chemical combination
of which they are composed. 1t consists,
first, in subjeciug the ores TO a burning pro-
cess in a peculiarly constructed furnace,
second, after the ores are drawn fvom the
furnace they are allowed to COOL tb'id, then
The ore is passed into pans, or iron barrels,
that are charged with a solution and mercu
ry ready 10 receive it-I prefer barrels, as it
is less labor to amalgamate; fourth, the bar
rels are coupled to a shaft and worked by
mill power; the ores remain eight hours in
the barrels, which revolve eight hours after
charged, when the ores are desulphurzed
and the cohesion of the particles destroyed,
setting free the gold and silver, and leaving
it in state of ama!gam.
refer TO he accompanying drawing for a
fuller description of my furnace and the
method employ.
A is furnace of any suitable external
form or shape. b is boiler filled with wa
ter, aud is placed in the brickwork of the
furnace directly over The Fireplace (C), ibe
fire is built underneath the furnace and boiler,
aud the ore is passed into the chamber (D)
through the hopper (E), where it remains
until it is thoroughly roasted, which will
generally be accomplished in ten hours The
smoke and heat from the furnace pass up
through the opening (E) in the side of the
chamber (D), beneath the boiler, aud into
the ore chamber, where it aids in roasting
the ore. On The opposite side of the furnace
from the boiler is a covered way (G), which is
separated from the ore chamber by a partition,
through which drausht openings ia a) are
made, and through which the smoke passes
on its way to the chimney (H). These open
ings may be closed, OR the draught regulated
by dampers (D, which are attached to rod
(D) which extends through the side Of the
furnace; by sliding back and forth the
draught openings can be closed or partly
closed, as desired. Rising from the boiler
(B) is steam pipe (K), which leads directly
across the top of the furnace, and branches
out into a number of pipes Ok, X, k,) equal
to the number of draught openings.
These pipes descend through the top of the
furnace and terminates, one just above each
of the openings (a). so that a constant jet of
steam plays directly across the openings
upon the bottom of the ore chamber, and
prevents any waste of the metal by evapora-
ton, or by being carried off by the draught
This principle can be applied in various
places where metals are being subjected to
great heat, and it will be found to be com
pleto guard against evaporation or waste OF