IMPROVEMENTS IN THE do here for MANUFACTURE OF PORTLAND CEMENT
Year: 1884

page_text: We JOHN WILLIAM MATTESON, WALTER INGRAM CHAPMAN and THOMAS
GOULTON. MATTESON of the firm of Matteson and Chapman of Wellington
Cement Works Sunderland in the county of Durham, Cement Manufacturers
"IMPROVEMENTS IN THE
do hereby declare the nature of our Invention for
MANUFACTURE OF PORTLAND CEMENT" 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 certain "Improvements in the manufacture of Portland
Cement, and has for its object the improvement of the quality of the mixture of
chalk clay and water, technically known as "slurry" and to obtain at a particular
stage of the manufacture, a more complete admixture and homogeneity of the
materials with perfect disintegration, comminution, and freedon from such small
disintegrated particles of chalk, as are hitherto met with in all known processes of
manufacture. The period of manufacture at which we introduce our apparatus, is
after the mixture of chalk clay and water leaves the wash mills. The mixture is
then caused to flow down to our apparatus, through which it must pass, before
flowing on to the pump well or tanks, as the caso may be.
Our Invention consists in a novel construction and combination of parts, whereby
we accomplish our object.
We will now proceed to describe our improvement, by aid of the accompanying
drawings, in which, Figure 1. represents an elevation of our apparatus, Figure 2 an
elevation of the larger end, at which the mixture enters Figure 3 an enlarged cross
section of a quadrant of the sieve, showing the construction theroof, Figure 4 a
cross section at centre of sieve, showing the percussive arrangement hereinafter
described. Like letters indicate like parts in all of these figures.
"
In carrying our invention into practise we replace a sieve or tempse" A
Figures 1. 2. and 4. in a suitable position between the wash mills and the pump
wells or tanks, preferably of conical shape, and caused to revolve on a central shaft,
by suitable gearing and power. We do not confine ourselves to any particular
construction of the sieve, but we find the following arrangement found in Figures 1.
and 3. convenient. B is a perforated wire gauze of suitable mesh from 256 to 784
openings to the square inch, CC are strips of wood over the gauze, protected by
strips of iron D D, and firmly bolted together.-At the junctions of the sections we

page_text: "
place angle irons E. E. between which the ends of the gauze are socured in the
usual way. At the front end we fix an open disc G, of greater diameter than the
sieve A, which impinges upon a fixed flange H, built into the masonry of the well.
The smaller end of A, is fitted with a solid disc. In a convenient position, wo fix
a hammer or percussive arrangement F, Figure 4, actuated by means of a ratchet
or other suitable arrangment, as shown at L, Figure 4. The mixture or "slurry
flows into the continually revolving sieve A, at the front end as denoted by the
arrow, and is revolved therein, should any "slurry" pass beneath the front
flange G, without passing into A it is pulverised and ground by the fixed flange H,
upon and against which, the sievo A. and flange G. impinge. It will thus be seen
that no slurry can flow on to the tanks or pump wells without first passing through
the sieve, or being ground by the flange H.
In order to clear the meshes, we fix the hammer F, which is raised and allowed
to fall any convenient number of times at each revolution, and which by its
percussive action prevents any particles fouling the meshes of the sieve.
The slurry having passed through the sieve falls into the sieve well, from whence
by a suitable conduit it flows on with increased consistency and gravity, and
improved quality, as described, to the pump wells or drying flats ready for the next
stage of manufacture.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is
The revolving sieve A, with the fixed flange H, and the hammer F, whereby a
more perfect disintegration, comminution, and mixing is obtained, substantially as
heroin beforo described and illustrated by the accompanying drawings.
WAUGH & CHAPMAN,
Agents for the Applicants,
70, Chancery Lane, W.C.