Hall, Brooklyn, N. Y.--This invention
relates to an improved means for catching the oxyde of zinc, as it
escapes with the fumes and gases from roasting zinc, or zinc ore.
Hitherto the oxyde of zinc has been caught and retained by forcing the
fumes and gases from the roasting ore into a large bag or receptacle
composed of cotton cloth or other porous material, which will admit
of the gases and air passing it, but not the oxyde, the latter being
retained within the bag, and, by its superior gravity, falling to the
bottom thereof and settling in teats or pendent receptacles at the
bottom of the bag, from which it is removed from time to time. This
invention has for its object the dispensing with the large bag, which
is very expensive--the gases from the ore affecting the same so that it
rots in a very short time, and soon becomes ruptured under the blows
which are given it to cause the oxyde which adheres to the sides of
the bag to drop into the teats or receptacles made to receive it. The
invention consists in having the fumes and gases from the roasting zinc
or zinc ore forced into a close building, provided with openings or
apertures, over which screens are placed, constructed in such a manner
and of such materials as to admit of the air and gases passing through
them, but not the oxyde.
Pages:
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209