Improvements in or relating to Kilns for the Manufacture of Cement.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Kilns for the Manufacture of Cement.
I, BERNARD LIBAN, of Podgorze, Bonarka, near Krakau, Saxony, in the German
Empire, Cement Manufacturer, do hereby declare the nature of my said 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 shaft or pit kilns for burning Roman, Portland, and
other cement, and its object is to effect improvements in such kilns, whereby the
operations are capable of being continuously carried on.
And in order that my said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Fig. 1 is a sectional elevation of the kiln.
Fig. 2 is a sectional at right angles to Fig. 1.
Fig. 3 is a plan view of the fire grate.
The
Referring to Figs. 1 and 2, the kiln is shown divided into compartments or
drying chambers by means of bridges a and b, having spaces or openings al bi
through which the material is caused to fall as it becomes suitably dried.
moist material is delivered into the kiln through the doors c c, from whence it
falls on to the bridge a. Here it is dried by the heated gases, rising from below,
and in this condition is distributed or pushed over the opening a¹ by means of
rakes or other suitable tools, whereby it is caused to fall upon the bridge b, where
it is subjected to a higher temperature, and is afterwards similarly passed through
the openings, eventually reaching the combustion chamber få
The space above and between the bridges a and is accessible by means of the
doors e cand 2. The fuel is delivered into the furnace by means of the doors d d.
Simultaneously with the burning and withdrawing of the cement, the material
sinks in the shaft space, in which position it can be observed by means of doors
d, d², and ³, and its temperature and development regulated.
The lower spaces g g of the kiln are used as cooling rooms in which the-burnt
cement is exposed to a gradually dimishing temperature. Grate bars e e are
fitted as shown, having a broad opening h, through which the clinker can fall.
The superfluous material slides against the movable inclined bars e¹ e¹, from
whence it can be from time to time withdrawn.
The removal of the treated cement from the kiln can be effected in any suitable
manner.
The advantage of the invention is that, without in any way interfering with
the work, a continuous supply of moist material may be made, and at the same
time completely burnt cement can be withdrawn in the shape of clinker.
Previous drying of the raw material is rendered unnecessary, thus greatly
reducing the cost of working.
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:
In a kiln for the manufacture of cement, the arrangement and division of the
shaft space into a preliminary drying chamber above a combustion chamber;

page_text: bridges a and b having openings a¹ & b¹, all accessible by means of doors for con-
trolling and manipulation; the lowest portion of the kiln being applicable as
a cooling room from which the treated cement can from time to time be withdrawn,
substantially as herein before described and illustrated by the drawings.
Dated 10th April 1899.
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents for the Applicant.