Year: 1886

page_text: Date of Application, 8th Feb., 1886.
Complete Left, 8th Nov., 1886.
Complete Accepted, 8th Feb., 1887.
I WILLIAM JOY of Stonebridge Hill Northfleet in the County of Kent Cement
Burner do hereby declare the nature of this Invention to be as follows :-
My Invention consists of the improvements herein after described in the method of
charging or feeding cement kilns with slurry and fuel while the said kilns are in
action.
According to my said Invention I charge the lower part of the kiln with fuel or
with dried slurry and fuel in the usual way or in any suitable way and ignite the
charge and when the charge is well alight I feed the kiln as described in the provisional
specification filed by me on the thirtieth day of July A.D. 1885 and in the complete
specification filed by me on the twentieth day of November A.D. 1885 in application
for Letters Patent No 9154 or as described in the provisional specification filed by me
on the 22nd day of December A.D. 1885 in application for Letters Patent No. 15751
using in either case a considerable quantity of fuel and I continue so feeding the kiln
until the body of the burning charge (i.e. the part which is below the surface) is con-
verted into a clinker or mass of uniform density. This condition of the burning
charge is evidenced by the absence of any indication of irregularity of combustion
and draught at the different parts of the surface thereof and by a general compact-
ness of the said surface which then appears dark and by the presence of small blue
flickering flames which rise from the said surface. When the burning charge has
acquired this condition I cense feeding the kiln and allow combustion of the charge
to proceed until the surface thereof becomes deep red when the said blue flames will
have increased in number and coalesced I then take a mixture of fuel and slurry either
dry or wet or merely damp in which the proportion of fuel is less than that previously
used and scatter the said mixture on the charge distributing it uniformly over the
surface thereof until the redness is hidden or scarcely perceptible and the blue flames
have again become small and flickering. I then cease feeding the kiln until the
surface of the charge again becomes deep red when I scatter a further quantity of the

page_text: mixture over the surface as before and continue thus feeding the kiln at intervals as
combustion of the charge proceeds until the kiln has been fully charged when I allow
it to burn out and draw the burnt charge in the usual way or I draw part of the
burnt charge from the lower part of the kiln and continue feeding it at the upper
part as hereinbefore described.
If during the operation hereinbefore described the draught becomes stronger at
any part or parts of the charge than at other parts and the combustion of the charge
consequently becomes more rapid at certain parts 1 discontinue scattering or distribut-
ing the mixture indiscriminately over the whole surface and I deposit the mixture
exclusively on the paris where the combustion is for the time proceeding most rapidly
until the draught at such parts appears sufficiently checked and the combustion at all
parts of the charge again appears uniform (judging by the indications hereinbefore
described) when I continue feeding the kiln by scattering the mixture at intervals
over the whole surface as hereinbefore described.
W. T. WHITEMAN,
Agent for the Applicant.

page_text: I WILLIAM JOY of Stonebridge Hill Northfleet in the County of Kent Cement
Burner 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
My invention consists of the improvements hereinafter described in the method of
charging or feeding cement kilns with slurry and fuel while the said kilns are in action.
According to my said invention I charge the lower part of the kiln with fuel or
with dried slurry and fuel in the usual way or in any suitable way and ignite the
charge and when the charge is well alight. I feed the kiln as described in the
provisional specification filed by me on the thirtieth day of July A.D. 1885 and in the
complete specification filed by me on the twentieth day of November A.D. 1885 in
application for Letters Patent No. 9154 or as described in the provisional specification
filed by me on the 22nd day of December A.D. 1885 and in the complete specification
filed by me on the twentieth day of September A.D. 1886 in application for Letters
Patent No. 15751 using in either case a considerable quantity of fuel say about seven
parts by bulk of breeze to eight parts by bulk of slurry or about seven parts by bulk
of coal dust or crushed coal (preferably anthracite) to ten parts by bulk of slurry and
I continue so feeding the kiln until the body of the burning charge (i.e. the part
below that in which the fuel is burning) is converted into a clinker" or mass of
uniform or nearly uniform denisty or compactness. This condition of the burning
charge is evidenced by the absence of any indication of irregularity of combustion
and draught at the different parts of the surface thereof or by the presence of only
slight indications of such irregularity and by a general compactness of the said
surface which then appears dark and by the presence of small flickering flames
principally of a blue colour which rise from the said surface. When the burning
charge has acquired this condition I cease feeding the kiln and allow combustion of
the charge to proceed until the surface thereof becomes deep red when the said flames
will have increased in number and coalesced and become principally of a yellow
colour. I then take a mixture of fuel and slurry either dry or wet or merely damp
in which the proportion of fuel is less than that used for starting the kiln say about
seven parts by bulk of breeze to ten parts by bulk of slurry or about seven
parts by bulk of coal dust or crushed coal (preferably anthracite) to twelve parts
by bulk of slurry and I scatter the said mixture on the charge distributing it
uniformly over the surface thereof until the redness is hidden or scarcely perceptible
and the flames have again become small and flickering and principally of a blue
colour or have nearly or only just disappeared. I then cease feeding the kiln until the
surface of the charge again becomes deep red and the flames rising therefrom have
again become principally of a yellow colour when I scatter a further quantity of the
mixture over the surface as before and continue thus feeding the kiln at intervals as
combustion of the charge proceeds until the kiln as been fully charged when I allow
it to burn out and draw the burnt charge in the usual way or I draw part of the burnt
charge from the lower part of the kiln and continue feeding it at the upper part as
hereinbefore described. By feeding the kiln as hereinbefore described instead of fully

page_text: charging the kiln before igniting the charge detrimental obstruction of the draught
is avoided and the time occupied in the burning of a given quantity of slurry is
considerably reduced.
If during the burning of the mixture uniformly scattered on the charge as herein-
before described the draught becomes stronger at any part or parts of the charge than
at other parts and the combustion of the charge consequently becomes more rapid
at certain parts I discontinue scattering or distributing the mixture indiscriminately
over the whole surface and I deposit portions of the mixture alone or portions of the
mixture and some fuel exclusively on the parts where the combustion is for the time
proceeding most rapidly until (judging by the indications hereinbefore described) the
draught at such parts appears sufficiently checked and the combustion at all parts of
the charge again appears uniform or nearly uniform when I continue feeding the
kiln by scattering the mixture at intervals over the whole surface as hereinbefore
described.
The mixture may be fed into the kiln in the form of lumps or masses either dry or
wet or merely moist or damp or in the form of powder or small pieces and dust and
the feeding may be effected by throwing the mixture by hand into the kiln through
the usual eves in the upper part thereof.
Although I have hereinbefore stated approximately the proportions in which the
fuel and slurry may be added together to form the aforesaid mixture I wish it to he
understood that the said proportions may be varied as usual according to the quality
or weight of the cement required. The proportions hereinbefore stated are those
required for the production of cement of average weight.
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 :—
The intermittent charging or feeding of a cement kiln substantially as hereinbefore
described with a mixture of slurry and fuel in the form of lumps or masses either dry
or moist or in the form of small pieces and dust when the kiln has been partly
charged in any suitable way
and while the contents thereof are burning that is to say
the feeding of the kiln by the uniform distribution of such a mixture over the surface
of the burning charge when the part of the charge below that in which the fuel is
burning has by the process of combustion become converted into a mass of uniform or
nearly uniform density or compactness each feeding of the kiln being begun when the
appearance of the surface of the charge indicates that the fuel in the part of charge near
the surface is burning freely and uniformly and the feeding being suspended when the
indications of combustion are reduced thereby to about the extent hereinbefore stated.
W. T. WHITEMAN,
Agent for the Applicant.