Improved Means Applicable for Use in Drying Cement Slurry, Liquid Clay and Other Substances in Like Condition.
Year: 1896

page_text: Date of Application, 17th Sep., 1896
Complete Specification Left, 17th June, 1897-Accepted, 24th July, 1897
Improved Means Applicable for Use in Drying Cement Slurry,
Liquid Clay and Other Substances in Like Condition.
I, GEORGE GATTON MELHUSIH HARDINGHAM, of 191, Fleet Street, in the City of
London, Civil Engineer and Chartered Patent Agent, do hereby declare the nature
of this invention (a communication to me from Franklin David Cummer, of 1051, East
Madison Avenue, in the City of Cleveland and County of Cuyahoga, State of Ohio,
one of the United States of America, Manufacturer, temporarily residing at
the Hotel St. Antoine, Antwerp, in the Kingdom of Belgium), to be as
follows:-
This invention relates to an improved method of, and apparatus for use in, drying
cement slurry, liquid clay and other substances of a similar character and in like
condition; one of the objects thereof being to overcome the difficulties commonly
met with in drying such substances owing to the clogging of the apparatus employed
in their treatment.
In drying cement slurry, for example, according to my correspondent's improved
method, a suitable proportion of dried and ground cement is mixed with the slurry,
thereby reducing the percentage of moisture of the whole to such a degree that the
material will not adhere to the drying apparatus during its passage therethrough.
The material is then dried and ground, or partially ground and the dust separated,
the latter being returned for admixture with the wet material subsequently treated.
In some cases, the mingling of the dry with the wet material may be conveniently
effected in a spout or hopper; or the wet material may be received in the drying
apparatus upon a surface kept constantly supplied with dust of like description;
or both modes of adding the moisture-absorbing agent may be employed
concurrently.
In other cases, it may be necessary to pass the mixture of wet and dry materials
through a pug-mill in order to effect their complete incorporation.
11 17th day of Santamber 1896
G. G. M. HARDINGHAM.
Improved Mean Applicable for Use in Drying Cement Slurry
Liquid Clay and Other Substances in Like Condition.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the City of
London, Civil Engineer and Chartered Patent Agent, do hereby declare the nature
of this invention (a communication to me from Franklin David Cummer, of 1051, East
Madison Avenue, in the City of Cleveland and County of Cuyahoga, State of Ohio,
one of the United States of America, Manufacturer, temporarily residing at
the Hotel St. Antoine, Antwerp, in the Kingdom of Belgium), and in what manner

page_text: the same is to be performed to be particularly described and ascertained in and by
the following statement:-
This invention relates to an improved method of, and apparatus for use in, drying
cement slurry, liquid clay and other substances of a similar character and in like
condition; one of the objects thereof being to overcome the difficulties commonly
met with in drying such substances owing to the clogging of the apparatus employed
in their treatment.
In drying cement slurry, for example, according to my correspondent's improved
method, a suitable proportion of dried material, such as cement, preferably in a
finely-divided or powdered condition, is mixed with the wet slurry, thereby reducing
the percentage of moisture of the whole to such a degree that the material will not
adhere to the drying apparatus during its passage therethrough. The material may
be dried and ground, or it may be partially ground and the dust separated, and the
latter returned for subsequent mixing with fresh charges of wet material.
In some cases the mingling of the dry powdered material with the wet material
may be conveniently effected in a spout or hopper or by means of suitable mixing
apparatus; or the wet material may be received in the drying apparatus upon a
surface kept constantly supplied with dust of like description; and other modes of
adding the moisture-absorbing agent may be employed concurrently.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
1. The herein described method of drying cement slurry, liquid clay and similar
substances, same consisting in mixing with the wet substance a moisture-absorbing
agent, such as dust or powder of corresponding character, so as to reduce the
percentage of moisture, drying the mixture and then grinding the same.
2. The herein described method of drying cement slurry, liquid clay and similar
substances, same consisting in mixing the wet substance with the dust of corre-
sponding character so as to reduce the percentage of moisture to such a degree that
the material will not adhere to the apparatus, drying the mixture, grinding or
partially grinding the same and returning the dust so obtained for use in the initial
stage of the process.
3. In the drying of cement slurry, liquid clay and similar substances, mingling
with the wet substance dry powdered material of corresponding character in either
of the modes herein described and whereby the percentage of moisture is reduced
and clogging of, or adherence to, the drying apparatus is obviated, substantially as
set forth.