Improvements in the Treatment of Ground Slags Intended for Use as Fertilisers.
Year: 1896

page_text: Date of Application, 13th Oct., 1896-Accepted, 21st Nov., 1895
COMPLETE SPECIFICATION.
Improvements in the Treatment of Ground Slags Intended for Use as
Fertilisers.
CHARLES HENRY LANGDALE of 10 Winchester Terrace, Newcastle-on-Tyne,
Merchant, and ARTHUR WILLIAM LANGDALE of No. 2 Claremont Villas, Forest
Hall, Newcastle-on-Tyne Merchant. We 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 addition of brine containing solutions of the salts of magnesium to ground
phosphatic basic slag, or any variety of ground slag intended for use as fertilisers,
or manures on the land, and thus putting them into a condition to handle, and sow
without objectionable dust, and to cause the added moisture to be retained more
evenly than when water alone is added, and also to cause a more intimate mixture
than can be done by adding salts not in solution.
A brine can be made by taking a known quantity of water, and dissolving in it
the quantity, and kind of salt required such for example as by making a saturated
solution of water containing the salts of sulphate of magnesia, and or chloride of
magnesium, and then eight parts by weight of brine so made to be added to about
ninety-two parts by weight of ground slag.
The proportions of solution can be varied to suit local requirements to be from
about two per cent. of such a solution as before described up to about
twenty per cent, instead of eight per cent. in the mixture as before named, but the
mixture made as before described of eight per cent. of brine, and ninety-two per cent.
of ground slag will carry the invention into effect.
The nature of the salts employed are such as sulphate of magnesia, chloride of
magnesium, or any substances containing the salts of magnesium from which the
brine could be made, and which are found to be most advantageous to use in the
districts in which this process may be worked.
The brine and ground slag can be mixed in proportions as required by weighing,
or measuring off the quantities desired, and mixing by hand with a shovel, and
adding the brine to the ground slag by means of a watering vessel, or the mixing may
be done by means of a horizontal or vertical mixing machine baving a revolving
shaft with arms attached for stirrers, or by other suitable machines, and the
brine can be weighed, or measured off in cisterns and the ground slag can be
weighed, or measured off in quantities as desired, and so that the two materials
can be fed under control as to quantity by means of pipes, belts and buckets,
Borew worms or other suitable means into the mixing machine which can be driven
by a suitable engine to give the power required.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is
The addition of brine containing solutions of the salts of magnesium to ground
phosphatic basio slag, or any variety of ground slag intended for use as fertilisers
or manures on the land, and thus putting them into a condition to handle and sow

page_text: without objectionable dust, and to cause the added moisture to be retained more
evenly than when water alone is added, and also to cause a more intimate mixture
than can be done by adding salts not in solution.
Dated this Twelfth day of October 1896.
CHARLES HENRY LANGDALE.
ARTHUR WILLIAM LANGDALE.