An Improvement in Calcining Kilns or Furnaces.
Year: 1893

page_text: Date of Application, 10th Aug., 1893
Complete Specification Left, 4th May, 1894-Accepted, 9th June, 1894
PROVISIONAL SPECIFICATION
An Improvement in Calcining Kilns or Furnaces.
I, CHARLES COCHRANE, of Green Royde, Pedmore, near Stourbridge, Iron-
master, do hereby declare the nature of this invention to be as follows:-
Attempts have been made to work calcining kilns or furnaces, such as kilns for
burning lime or furnaces for calcining ores, with the flames and products of
combustion of producer or other gas, but it has been found impossible to pass the
flames and hot gases through any but a very moderate mass of the material on
which they have to act.
My invention relates to a construction of calcining kilns or furnaces in such a
manner that the flames and hot gases resulting from the combustion of producer or
other gas are caused to penetrate and pass transversely and upwards through a
considerable mass of material. For this purpose, I place across the body of the kiln
or furnace at intervals apart, and it may be at various heights, tubes or conduits of
iron or refractory material which in their middle parts are open for some distance
along their undersides, and which at their ends communicate with chimneys
provided, if necessary, with dampers or other valves. The chimneys with which
these tubes or conduits communicate furnish a powerful draught, by which the hot
gases are caused to pass through a considerable body of material undergoing
calcination and enter the tubes or conduits in whole or in part by the openings on
their lower sides.
Dated this 10th day of August 1893.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Calcining Kilns or Furnaces.
I, CHARLES COCHRANE, of Green Royde, Pedmore near Stourbridge, Iron-
master, 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 :-
Attempts have been made to work calcining kilns or furnaces, such as kilns for
burning lime or furnaces for calcining ores, with the flames and products of com-
bustion of producer or other gas, but it has been found impossible to pass the
flames and hot gases through any but a very moderate mass of the material on
which they have to act.
My invention relates to a construction of calcining kilns or furnaces in such
a manner that the flames and hot gases resulting from the combustion of producer
or other gas are caused to penetrate and pass transversely and upwards through
a considerable mass of material. For this purpose, I place across the body of the
kiln or furnace at intervals apart, and it may be at various heights, tubes or conduits
of iron or refractory material which in their middle parts are open for some
distance along their undersides, and which at their ends communicate with chimneys
provided if necessary with dainpers or other valves. The chimneys, with which
these tubes or conduits communicate, furnish a powerful draught, by which the hot
gases are caused to pass through a considerable body of material undergoing
Price 87

page_text: calcination, and enter the tubes or conduits, in whole or in part, by the openings
on their lower sides.
Fig. 1 of the accompanying drawings is a vertical section and Fig. 2 is a plan
partly sectional on the line Z Z of Fig. 1 of a calcining kiln or furnace according
to my invention..
A is a flue or conduit leading, from any suitable producer, gas which ascends
pipes B and is directed by nozzles C into the interior of the kiln, air entering with
the gas by the passages surrounding the nozzles C. Across the kiln at some
distance above the uozzles are placed pipes D communicating at their ends with
chimneys E and having openings d through their undersides.
The kiln or furnace chamber F being charged with the material to be calcined,
and the gas issuing from the nozzles C being ignited, the flames and hot products
of combustion pass up through the body of material in F and through the
openings d and pipes D to the chimneys E, their passage through the material
being ensured by the draught of the chimneys, which may be regulated as desired
by dampers or valves e on the tops of the chimneys.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A calcining kilu or furnace having in its lower part suitable nozzles and openings
for admission of combustible gas and air, in its upper part transverse pipes with
openings on their undersides and chimneys with which these pipes communicate,
substantially as and for the purpose herein set forth.
Dated this 4th day of May 1894.
ABEL & IMRAY,
Agents for the Applicant.