Improvements in Furnaces and Apparatus for and in the Recovery and Purifying of Iron, Metals, Slag and Cinder Tap Ores, and other kinds of Waste Products, and for other purposes.
Year: 1898

page_text: Date of Application, 15th June, 1898-Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in Furnaces and Apparatus for and in the Recovery
and Purifying of Iron, Metals, Slag and Cinder Tap Ores, and
other kinds of Waste Products, and for other purposes.
I, WILLIAM JOHN CLAPP, of 19, Belgrave Road, Edgbaston, Birmingham, in
the County of Warwick, Surgeon, 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:-
This invention relates to the improvements hereinafter described in furnaces
and apparatus for and in the recovery and purifying of iron, metals, slag and
cinder tap ores and other kinds of waste products, and for other purposes, such
for example as means for preserving the top of the furnace by keeping the flame
and heat entirely to the furnace hearth which is of great importance in melting
and heating various kinds of metal.
My invention is applicable to various kinds of furnaces such for example as
Bessemer, Siemens, and reverberatory, regenerative, or recuperative, and annealing
furnaces and the like. I therefore wish it to be understood that when the word
furnace is used it applies to any kind of furnace in which my invention is
applicable.
My invention consists essentially in the improvements in utilization of the
waste products from the various furnaces aforesaid such for example as iron
steel slag and slag wool in combination with the refuse of gas lime old fire bricks,
fireclay, limestone, marble refuse, plaster of paris lime, whinstone, granite, flint,
and graphlite, either separately or in combination with the refuse of slag wool
on account of the silicate it contains, as well as borax tugstate of soda, burnt
alum, ammonia, chloride of platinum, salt or other similar fire or damp proof
chemicals and glazing materials as well as various colouring chemicals that may
be required, which are used in the manufacture of cements bricks, or fire proof
articles or the like. The nature of my invention will be more clearly understood
from the accompanying drawings which illustrate a few only of the examples in
which my invention may be applied, the same letter of reference indicating
similar parts throughout.
Figure 1 represents in longitudinal section and Figure 2 in side elevation a
reverberatory furnace constructed according to my invention. Figure 3 represents
the same furnace slightly modified. A, represents the grate of the furnace
and B the body and C the hearth. The furnace is provided with the usual
fireing door E and the furnace door F. The flue G, is connected to the stack H
and is provided with the usual form of damper I. J, represents a tuyere
depending from the hopper K, which is supplied with powdered lime or other
purifying agents. L is a superheater arranged to be heated by the fire contained
in the box M. The furnace is heated similar to the ordinary reverberatory or
regenerative furnace or I may use gas or petroleum or electricity. The flame
passes from the grate A over the two bridges N, N, and kept to the hearth C,
by means of the steam passing from the tuyere J or as many tuyeres as may be

page_text: necessary which delivers with it the lime or other materials or chemicals con-
tained in the hopper K, the action of this jet of highly superheated steam is
not only to keep the flame from the top of the furnace but to charge the flame
with purifying agents that will assist in removing the deleterious sulphur phos-
phorus and the like. The object of the two bridges N, N, is to assist the Hame
to draw with greater velocity to the interior of the furnace, and the space 0,
between the two bridges forms a receiver for recovery of carbon lime and
manganese or any other purifying agents delivered from the tuyeres J. The
passage of steam to the superheater L is regulated by the lever and valve P.
The hopper Q is supplied with suitable purifying agents which are delivered by
means of a jet of steam to the grate A through the pipe R, and as many jets
as may be necessary.
The flame passing through the flue G enters the base of the stack H where
it is operated on by a spray of superheated steam passing through the coil S, T is
a water spray arranged to operate on the flame from the bottom and recovers
therefrom by products such as carbon sulphur and the like. The steam spray
operating at the top of the flame and the water at the bottom převents the
carbonic gas from exploding in the stack thus washing and purifying the gases.
The water bosh U, receives the deleterious matter from the flame and smoke
which is of chemical value. In the arrangement shown at Figure 3, the super-
heater L is placed inside the furnace instead of in a separate box M as shown
at Figures 1 and 2.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is: -
1. The improvements in furnaces and apparatus for and in the recovery and
purifying of iron metal slag and cinder top ores and other kinds of waste products,
substantially as described and for the purpose set forth.
2. In the combination of a furnace as herein described the arrangement for
charging or injecting into the flame a limited quantity of lime or other purifying
agents by means of a steam jet or jets substantially as described and for the
purpose set forth.
3. The combination in a furnace as claimed above of the two bridges N, N,
substantially as described and for the purpose set forth.
'
4. In the combination with a furnace as herein described the arrangement
for charging or operating on the flame as it enters the stack with a jet or spray
of steam and a jet or spray of water, whereby the recovery of various by pro-
ducts from the flame is effected and explosions in the stack prevented substantially
as described and for the purpose set forth.
Dated this 11th day of June 1898.
WILLIAM HENRY BARACLOUGH,
36, Temple Street, Birmingham, Agent for the Applicant.