Year: 1889

page_text: Date of Application, 4th June, 1889
Complete Specification Left, 25th Feb., 1890-Accepted, 19th Apr., 1890
I, THOMAS TURNER of 217 Ladywood Road Birmingham in the County of Warwick
Lecturer on Metallurgy do hereby declare the nature of my said invention to be as
follows:-
My invention has for its object improvements in the treatment of waste pickle
from galvanizing works, so that the properties contained may be more fully utilized
than heretofore.
I use a closed furnace made of fire brick and set in firebrick mortar, or a furnace of
other suitable material; the furnace is heated from below or in any suitable manner,
and is fitted with working openings, and with a pipe, or pipes passing through the
The bottom of the
upper part of the furnace for carrying away the regenerated acid.
furnace may be made of large fire bricks, rabitted together or of iron plates or pans,
but need not be water tight nor acid resisting though used for distilling an acid
liquid. The waste liquor which may have been previously concentrated if desired, is
introduced from above, dripping or trickling through the top of the furnace through
suitable pipes passing through the roof or sides of the furnace and being distributed
to these pipes by means of suitable troughs with taps or other arrangements outside
the furnace in order to allow the workman to regulate the amount of acid in any part
of the furnace. The liquor is allowed to enter at such a rate that it distils as fast as
it enters, never forming a bath of liquid, but leaving a cake of more or less basic
chloride of iron which fills up any cracks in the bottom of the furnace, and protects
the brick or iron bottom. When a sufficient thickness of this crust has been formed
the temperature is slightly raised by stopping the supply of acid or other means, so as
to loosen the cake of chloride of iron from the furnace bottom. The cake is then
broken up and heated either in the same or another furnace to a somewhat higher
temperature not exceeding a dull red heat while air and steam are passed over in
suitable proportions. The steam should be used only in such quantity as may be
necessary to prevent ferric chloride distilling in the form of brown fumes with the
obtained
acid. The steam may be replaced wholly or in part by the acid water vapour
from the liquor itself or from the basic chloride of iron though I prefer to use a little
steam in the latter part of the process.
The oxide of iron thus obtained may be used as a pigment if desired, but as special
care is required in the roasting if a good colour is to be obtained, I prefer to use the
oxide for other purposes for which its special purity from injurious impurities renders
it suitable. The hydrochloric acid is condensed in the usual way with pipes, tanks
and towers as usual.
A
L
1000

page_text: COMPLETE SPECIFICATION.
Improvements in the Treatment of Waste Pickle from Galvanizing
Works.
I THOMAS TURNER of 217 Ladywood Road Birmingham in the County of Warwick
Lecturer on Metallurgy do hereby declare the nature of my said invention & in what
manner the same is to be performed to be particularly described & ascertained in & by
the following statement:-
My invention has for its object improvements in the treatment of waste pickle
from galvanizing works, so that such liquors may be more fully utilized than
heretofore.
I use a closed furnace made of fire brick and set in fire brick mortar, or a furnace
of other suitable material, the furnace is heated from below or in any suitable manner
and is fitted with working openings & with a pipe or pipes passing through the upper
part of the furnace for carrying away the regenerative acid.
The bottom of the furnace may be made of large fire bricks rabitted together or of
iron plates or pans but need not be watertight nor acid resisting though used for
distilling an acid liquid. The waste liquor which may have been previously concen-
trated if desired is introduced from above dripping or trickling through the top of the
furnace or through suitable pipes passing through the roof or sides of the furnace &
being distributed to these pipes by means of suitable troughs with taps or other arrange-
ments outside the furnace in order to allow the workman to regulate the amount of
acid in any part of the furnace. The liquor is allowed to enter at such a rate that it
distils as fast as it enters never forming more than a shallow bath of liquid, but leaving
a cake of more or less basic chloride of iron which fills up any cracks in the bottom of
the furnace and protects the bottom. When a sufficient thickness of this crust has
been formed the temperature is slightly raised by stopping the supply of acid or by other
means so as to loosen the cake of chloride of iron from the furnace bottom. The cake
is then broken up & heated either in the same or another furnace to a somewhat higher
temperature not exceeding a dull red heat while air and steam are passed over in
suitable proportions. The steam should only be used in such quantities as may be
necessary to prevent ferric cùloride distilling in the form of brown fumes with the
acid.
The steam may be replaced wholly or in part by the acid water vapour obtained
from the liquor itself or from the basic chloride of iron.
The oxide of iron thus obtained may be used as a pigment if desired, but, as special
care is required in the roasting if a good colour is to be obtained I prefer to use the
oxide for other purposes for which its special freedom from injurious impurities
renders it suitable. The hydrochloric acid is condensed in the usual way with pipes
tanks and towers.
To assist others in my invention I have appended hereunto a double sized sheet of
drawings giving diagrams of the furnace herein referred to.
Figure 3, is a plan of the furnace.
Figure is a longitudinal section, on the irregular line A. B.
Figure 2, is a cross section on the line C. D.
Figure 4, is a sectional plan on the line F. H.
E represents the internal part of the furnace covered by the brick arch N. The
bottom may be formed by the fire bricks e¹ which fall towards the centre e² & they
are rabitted together as shown by e' & the furnace is heated by mears of the flues K
underneath it. Access to the furnace is obtained through the doors e³ et es & e of
which there may be any number and I do not confine myself to the sizes shewn for
the furnace as it may be less or more in any direction. The waste liquor is conveyed
to the furnace by any suitable means, such as the wood troughs R from which the
liquor passes through the taps 1 into the bell mouthed pipes S and thence into the
furnace,

page_text: These pipes may be filled in with pieces of coke &c., to prevent the regenerated acid
rising through them but when the furnace once commences working they rather act as
inlets for a small quantity of air & the regenerated acid passes up the proper exit
pipe M and along m¹ to the condenser or other apparatus as desired.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed I declare that what I
claim is :-
The improvements in the treatment of waste pickle from galvanizing work
substantially in the manner as herein before explained with reference to the accom
panying drawings.
.S
-
Dated this 24th day of February 1890.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.