The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1907-12-06

sheets TO the actlOn OF the WIND ana
sun, where evaporation occurs and a
formation of basic sulphides and the
separation of the sulphur and silica is
the result.
How Values Are Recovered.
The waste area required for caring
for the fumes for a 700-ton plant would
be twenty acres. The Objectionable
sulphur gases are thus deposited on
the ground in combination as insoluble
basic salts and free sulphur. The resi-
due remaining from the decomposition
of the Stag holds the values contained
in the material such as copper, lead,
gold and silver The f1ue' dust in the
smoke is in part dissolved, but its
values are concentrated along with
those OF the material used and the
latter removed with the concentrates,
which are afterward smelted and con-
verted to bullion.
The smoke absorption apparatus is
designed to intimately mix or bring
into contact smelter smoke with finely
ground or pulverized Stag or other
amenable material, to cause a Spume !
or dense spray of water in which the
fine slime of the material is suspended
and to bring this cloud of hydro mat
ter in current of sulphurous smoke.
A rough surface is provided OH
which the thin sheets of pulp and wa
ter attach themselves and become suf-
fciently exposed to the current of the
smoke. Before discharging the resi-
dual volume, a recondensation of the
vaporized liquor is made. An essential
feature of the process is the use of the
apparatus for removing f1ue dust from
the smoke
Scheme of Collecting Flue Dust.
III
smoke process is as follows: The sui
phur smoke is passed into Longitude
nal wooden chamber charged with
pulp and water, the hydro matter is
brought into contact with the smoke
by the action of rotary battles.
The sulphur gases are absorbed by
the spray caused during the revOlu-
ton of the battles and by the film on
the rough surface presented by the
battles. The material used is at the
same time dissolved, the amount of
dissolution depending upon the ma
terial used, which i'm turn depends
upon the purpose for which the ap-
paratus Is used.
After the smoke has passed the TO-
tary battles, most of the sulphurous
gases and all f1ue dust having disap-
peared it might with prOpriety be dis
charged as harmless.
II II Is desired 10 remove Ine small
residual of sulphur gases which are
held in the vapor, and to cOndense the |
excess moisture, the wet smoke vol !
ume is passed into a condensing ar
Tangement, the principal of which de- !
ponds on the action of the nuclei dust, !
or the presentation of a vast number |
of points of contact, such as those |
formed by small Jumps of coke or pre- |
ferably by ore containing soluble cop
per compounds, such as carbonates and /
oxides.
Apparatus Explained in Drawings.
The drawings are of a side elevation |
and section.
Figure Side elevation in section.
Figure Corresponding plan in sec
ton.
Similar letters and figures refer to
similar parts throughout the sketches. |
Referring to figures l and 2:
A-StationaTy chamber which is to |
be termed the absorber.
B-Continuation of the chamber, and |
since its province is mainly condensa-
ton, 1t is designated as condenser.
C-Duct TO fan. which induces the |
flow of gas through the apparatus to !
the discharge.
d. f and F-Rotary baffles, resting |
on bearings and driven by motor pow |
eTs L he BdllltS dIt LOI lllGu OI SIGlpS OF /
cocoa mating, ropes or similar ma
terial.
Represents spatter boards. |
which also are designed to carry up /
and distribute the slime carrying |
liquor.
The arrangement Cd is designed to /
turn in the direction shown by the ar
dow. It represents a checkered and |
continuous surface to the smoke. The /
smoke which does not penetrate the |
wheel or is not caught, is trapped and |
carried to the liquor which absorbs an
other part of the sulphur gases and is |
then discharged to the succeeding baf- |
hes.
The battles CE) may turn in either /
direction, 1t may be seen that the /
smoke is compelled to follow a very /
sinUOus course, whether il penetrates /
the mating or follows the course of |
least resistance as shown by the ar
rows.
IA form of battle i'm which rope is !
the contact forming surface.
Any form of wheel described may be /
used, or any combination of them A |
modification may at times be desira BILE.
but in any event the particular charac-
ter of the smoke volume which is to be
treated would be the determining fac
tor.