Improvements in the Manufacture of Fertilizers or Manuring Compounds.
Year: 1887

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Fertilizers or Manuring
Compounds.
I, JOHN DAVENPORT, of Stoke on Trent, in the County of Stafford, Agent, do
hereby declare the nature of the said Invention, 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 the adaptation as hereinafter stated of raw iron pyritiferous
compounds, or of raw iron pyrites alone, or in combination with spent plaster or old
disused moulds (at present wasted products in pottery districts,) each adapted or
prepared as hereinafter stated, or with gypsum, silica, silicious rock, burnt clay
or aluminous earth, each adapted or prepared as hereinafter stated, as a fertilizer
or manure or as fertilizing or manuring compounds.
The said pyrites or pyritiferous compounds, and admixtures, are adapted or
prepared for the purpose of the Invention by being ground to a finely powdered, or
finely powdered and mixed condition, and in such condition are cheap in production
and are especially servicable for the said intended use and capable of being easily and
equably distributed over the land.
I do not limit myself to the use of any particular proportions of such substances
when used in combination, as the composition of the manure as a fertilizer has to be
rendered suitable to the requirements of the land or crops, which may vary very
considerably.
I, however, find that the most generally satisfactory results are obtained with iron
pyritiferous compounds containing silica and alumina in joint quantity by weight
about double that of the contained sulphur and iron, and in which the proportion of
silica is about double that of the alumina, and the proportion of sulphur slightly
exceeds that of the iron, such pyritiferous compounds being taken in the raw state
and adapted or prepared for the use of the Invention by being reduced by any suitable
means to a finely powdered condition.
If the said pyrites consist solely or almost solely of sulphur and iron, I prefer to
combine therewith some one or more of the said substances, (which are mostly readily
and inexpensively obtainable in the immediate districts where the said pyrites are

page_text: found) for the purpose more especially of facilitating the easy and equable distribu-
tion of the powdered pyrites upon the land in quantity as may be desired, and for
such purposes the said admixing mediums possess especial advantages and in certain
districts especial local advantages as regards the utilization of at present wasted
products and as regards the economical preparation of compounds possessing
valuable fertilizing qualities.
For instance, in the pottery districts, the material I prefer to use in combination
with the said pyrites, consists of spent plaster or old disused moulds at present a
wasted product, and which is or are adapted or prepared for the purpose of the
Invention by being ground to a finely powdered condition and thoroughly well mixed
with the raw powdered pyrites in proportions as may be most suitable to the require-
ments of the land to which it is intended to be applied.
In other districts where such materials are not readily obtainable, I use for the
said purpose, gypsum, silica or silicious rock adapted or prepared for the use of the
Invention as aforesaid in a finely powdered condition; and where such materials
are not readily obtainable I use for the said purpose burnt clay or aluminous earth
also adapted or prepared for and as aforesaid.
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 :-
1. The adaptation, application and use of raw iron pyrites or iron pyritiferous
compounds, substantially as and for the purpose hereinbefore described.
2. The adaptation, application and use of raw iron pyrites or iron pyritiferous
compounds in combination with spent plaster or old disused moulds, or with gypsum,
silica or silicious rock, or with burnt clay or aluminous earth, substantially as and
for the purpose hereinbefore described.
DL: Oth Jo of November 1887
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.