Improvements in and relating to Apparatus for Generating Steam, Chiefly Designed for Utilizing the Heat of Slag from Blast and other Furnaces.
Year: 1888

page_text: Improvements in and relating to Apparatus for Generating Steam,
Chiefly Designed for Utilizing the Heat of Slag from Blast and
other Furnaces.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 apparatus for utilizing the heat of slag from blast and other
furnaces for generating steam.
In the accompanying drawing
Figure 1 is a transverse vertical section taken on the line x, x of Figure 2 looking
in the direction of the arrows; and
Figure 2 is a plan view taken on the line y of Figure 1 looking in the direction of
the arrow.
In the drawings, A represents the steam generating boiler; B slag receiving
dumping pans located beneath the boiler C, other dumping pans on which the slag is
deposited after it has partially cooled ; D a car or receptacle into which the slag is
finally dumped and carried away; E an auxiliary furnace to assist the slag furnace
whenever desired ; F water pipes; G air pipes; H a fan or blower; and I a steam
pipe for conveying the steam to the place of use.
In making the improved slag steam generator, I make a steam generating boiler
in which a number of pipes are located preferably leading back and forth from one
hollow head to another, as shown in the application for Letters Patent of the United
States No. 257,071, filed December 6, 1887 though as to these features I am not
particular as to the precise construction adopted. Beneath the steam generating
boiler I arrango a number of chambers separated from each other by partitions and
referably extending from one end of the generator to the other, but by terming them

page_text: chambers I do not mean that they shall be separated, by, partitions of any particular
height as the partitions may in fact be but a few inches high and merely serve to
divide the space beneath the boiler into portions which may be separately filled and
emptied. These various chambers open at the top into the space in which the greater
number of the water pipes are located. They are provided with dumping or hinged
bottoms or plates so that they can be separately turned by a wrench or other means
to dump the slag which they are intended to contain. Immediately beneath them is
also arranged preferably a second series of dumping bottoms on which the slag falls
when dumped from the first set of bottoms. Beneath both sets of dumping bottoms
a space is provided into which a car or other conveyance may be run to carry off the
cooled slag when it is ready to be finally disposed of. A number of water pipes may
also be arranged in the partitions between the several slag chambers, as shown in
Figure 1. A fan is also preferably used to drive a current or blast of air into the
several slag chambers through the pipe F so as to cause the slag to throw off its heat
rapidly. I also prefer to employ an auxiliary furnace to increase the heat from the
slag when it may be desirable to do so. This furnace is shown in Figure 1, and its
operation will be readily understood without going into details. Above the water
pipes in the generator one or more pipes are arranged to collect and carry off the
steam as it is generated to the place of use.
In operation, I empty a quantity of molten slag into the upper slag chambers,
preferably at the end, so that it can flow along the dumping floors to the other end.
By preference I begin at one of the chambers at one side or the other and fill them
severally, one after the other. When the slag in the first one has cooled somewhat
I dump it by turning the floor and let it fall into the chamber immediately below
and onto the dumping. floor. I then fill the upper chamber which has thus been
emptied, and then empty and fill the next chamber, and so on over and over again as
desired. After the slag in the lower chambers has become sufficiently cooled I dump
it into a car or other conveyor run in to receive it whence it is carried away.
During this operation a fan may drive a blast of air into the upper chambers to assist
the slag in the radiation of its beat. Where the slag is scarce, or where for any
reason it is desired to do so, a fire may be kindled in the auxiliary, furnace to assist
the slag.
Having now particularly, described, and ascertained the nature, off, the said
invention and in what manner the same, is to, be performed, as, communicated;; to
me by my, foreign correspondent, I declare that what I claim is:
First. In a slag furnace for generating steam, the combination of the steam
generating boiler, with two or more slag supporting devices and partitions as described,
extending above the slag supporting device substantially as described.
Second. In a slag steam generating furnace, the combination of a steam generating
boiler, with one or more slag containing, vessels., located, thereunder. and arranged to
be dumped or emptied of their contents without being removed from under, the, boiler,
substantially.a
7.as described.
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