IMPROVEMENTS IN THE TREATMENT OF WASTE SAND FROM GLASS FACTORIES
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex, for an
Invention of "IMPROVEMENTS IN THE TREATMENT OF WASTE SAND FROM
GLASS FACTORIES." A communication from abroad by Fidéle Joseph Motte,
of Dampremy, in the Kingdom of Belgium.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 29th July 1881.
HERBERT JOHN HADDAN, of Kensington, Middlesex. "IMPROVEMENTS IN THE
TREATMENT OF WASTE SAND FROM GLASS FACTORIES." A communication from
abroad by Fidéle Joseph Motte, of Dampremy, in the Kingdom of Belgium.
This Invention consists in the employment and treatment for ceramic purposes
of the residue sand from glass factories, which as yet has been without any use.
The Invention is performed as follows:-I form the sand into bricks, slabs, flag-
stones, building material, etc., and I prepare it by moulding, pressing, drying, and
baking in kilns or ovens.
The sand more or less argilliferous which is left in abundance in the manufacture
of glass is reduced through its tenuity to a state of plasticity, so that it can be
easily fashioned into a paste with water and run into moulds and pressed or
otherwise. All what the sand has taken off from the glass through friction con-
tributes to increase this plasticity, which allows of using the sand for moulded
objects intended to undergo baking, the sand being previously eliquated.
The natural proportion of fusible soda-silicates or such like in the refuse sand is
sufficient for cementing the silicious particles by means of suitable baking, and
giving the necessary consistance to the objects manufactured. The products made
of this sand have besides great tenacity a very small specific weight (about 1-5).

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
27th January 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex. "IMPROVEMENTS IN THE
TREATMENT OF WASTE SAND FROM GLASS FACTORIES." A communication from
abroad by Fidéle Joseph Motte, of Dampremy, in the Kingdom of Belgium.
This Invention consists in the utilization of the residue sand from glass works
for the manufacture of refractory bricks, slabs, flagstones, building materials, and
ceramic ware.
The more or less argilliferous sand which is left in abundance in the manufacture
of glass is mostly reduced to such a state of tenuity that it acquires a certain
degree of plasticity, which allows it to be used as a paste by shaping it in moulds.
Whatever the sand has carried away from the glass by friction contributes to
increase this plasticity, which allows of using the sand for moulded objects intended
to undergo baking, the sand being previously eliquated.
The natural proportion of fusible soda-silicates or similar substances in the refuse
sand is sufficient for cementing the silicious particles by means of suitable baking,
and giving the necessary consistence to objects manufactured.
The moulding, compressing, drying, and baking are effected by means commonly
known.
This process is especially applicable for the manufacture of refractory bricks
either solid or hollow, slabs or flags either plain or provided with colored patterns,
and architectural ornaments.
The principal qualities of the articles thus produced are great tenacity similar to
that of the best building materials, an agreeable color similar to that of French
sand-stones; and a small specific weight which is only about 1.5 or about three fifth
of the specific weight of building stones.
CLAIM.
The-utilization-and-treatment of the refuse sand from glass works by moulding,
compressing, drying, and baking the same, substantially as and for the purposes
described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty seventh day of January, A.D. 1882.