Improvements in Apparatus for the Enriching of Phosphate of Lime and of Phosphated Chalks for the Preparation of Cements, Marls, and Starches, and for similar purposes.
Year: 1890

page_text: Date of Application, 19th Nov., 1890-Accepted, 20th Dec., 1890
COMPLETE SPECIFICATION.
Improvements in Apparatus for the Enriching of Phosphate of Lime
and of Phosphated Chalks for the Preparation of Cements, Marls,
and Starches, and for similar purposes.
I, ALPHONSE CAJOT, of St. Gilles, Brussels in the Kingdom of Belgium, Engineer,
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:-
The invention relates to an apparatus for washing and decanting or pouring off
intended for enriching phosphate of lime, and phosphated chalks, also applicable to the
preparation of cements, marls and starches.
I wish it to be clearly understood that I intend to reserve the right of these and all
other analogous applications.
The material to be heated having been first broken or crushed and mixed puddled
or knoaded with the addition of water is introduced through a hopper T to an endless
cupped chain or band A which delivers it into a box or case having three or more
watertight compartments B, C, D according to the amount of washing that is necessary.
In each of these compartments an endless cupped chain or band which acts as a drag
or elevator raises the material more or less freed from its impurities to throw it into
the next compartment through the apertures f which are formed inclined so as to force
or propel the said material towards the partition walls.
Each of the said compartments is divided at its upper portion by a partition.
At the lower part of this partition a pipe / connected to a main pipe o supplies pure
water for the complete washing. This pipe his perforated with small holes at that
part thereof situated in the interior of each compartment.
The water charged with lime alumina and other impurities runs out of each com-
partment through apertures m in pipes n which conduct it to a conduit drain or water
way P and from thence to the reservoirs.
Each of the said compartments is provided at its lower part with a mud or man
hole having an india-rubber or other suitable joint for cleaning and emptying in case
of an obstruction, and breaking of any of the endless chains or bands.
The tubes are provided with stop cocks or valves to regulate the admission of the
water. The variable speed of the endless cup chains or bands is obtained by means
of pulleys and toothed gearing.
The material washed and enriched is received at the delivery orifice in a hopper in
order to be subsequently conveyed to the drying apparatus.
My apparatus is distinguished from all others as hitherto constructed in that the
various parts of which it is composed have only up to the present been employed
separately and for an entirely different purpose. It affords the advantage of imme-
diately separating materials the specific gravity of which differs but slightly, but which
wash out more or less perfectly in water on account of the porosity and of the tenacity
of the molecules.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The apparatus hereinbefore described and illustrated in the accompanying drawing
consisting in endless cupped chains or bands combined with one or more water-tight
boxes or cases in which the said chains or bands perform the office of drags or elevators
to raise the material and throw it out through orifices for the purpose specified, the
Prion S27

page_text: whole combined with a system of water pipes, and a mud or man-hole for the cleaning
and emptying thereof.
Dated this 19th day of November 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.