Process for the Manufacture of Bricks, Building Blocks, and Ore Briquettes.
Year: 1899

page_text: Date of Application, 14th Apr., 1899-Accepted, 2nd June, 1899
COMPLETE SPECIFICATION.
Process for the Manufacture of Bricks, Building Blocks, and Ore
Briquettes.
:
I, HANS RENSING, of 81, Lippstrasse, Dorsten, in Westphalia, Manufacturer, 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 manufacture of lime-sand blocks of a mixture of sand and hydrate of lime
affords the most important advantages in manufacture. Heretofore it has not been
possible to obtain good produce of manufacture because an apparently insur-
mountable difficulty is constituted in this manufacture by the fact that the hydrate
of lime in slaking always contains particles which are sometimes hard and some-
times pasty, and which it is impossible to properly distribute in mixing with sand.
It is therefore extremely difficult, if not impossible, to produce a homogenous
mixture such as is required in order by the action of steam to produce a complete
union of the hydrate of lime with the silicic acid. In fact the bricks burst and
break apart in the boilers, or they become full of cracks whereby they are rendered
utterly useless.
Now the present invention relates to a process for obviating the above-mentioned
drawbacks. This object is effected by saturating the burnt lime (in slaking the
same) only partly with water, so that there results a dust-like powder which
flows like water and which is completely homogenous and contains neither hard nor
pasty particles, and which when mixed with sand and the like allows of producing
a perfectly uniform mass. The pulverulent hydrate of lime is then mixed with
silicious materials, such as sand, slate, ashes and the like substance, and so much
water is added to the mixture as to allow of moulding the mass. The moulded
articles, for example, building bricks or blocks, are subjected in boilers to the
action of steam under pressure, whereupon, after a few hours, silicate of lime
bricks are produced, which are extremely hard. In proceeding according to the.
present improved process the formation of cracks by the action of the steam
cannot take place. The process is consequently extremely simple and cheap,
apart from the fact that, by reason of the extremely fine subdivision of the lime
particles, the latter can enter into intimate union with the sand particles, and
thus allow of producing hard and durable bricks. According to the present
invention, there may be also produced ore briquets by adding to the mixture of
lime and sand the necessary quantity of finely divided ore or furnace dust.
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) Process for the manufacture of silicate of lime bricks, characterised by the
fact that the burnt lime is not entirely slaked to form hydrate of lime, so that
an extremely fine powder is produced which is then mixed with sand, slate, ashes
and other silicic acid-containing materials, whilst sufficient water is added to the

page_text: mixture to enable it to be moulded, and finally the moulded articles are subjected
in boilers to the action of steam under pressure.
(2) Process for the manufacture of silicate of lime bricks according to Claim 1,
for the purpose of producing ore briquets, characterised by the fact that a suitable
quantity of finely divided ore or furnace dust is added to the mixture of lime and
sand, the mass is moulded, and the moulded pieces are subjected in boilers to the
action of steam under pressure.
1 day of арт 1000.
ROBERT E. PHILLIPS, Assoc.M.Inst.C.E., M.I.Mech.E.,
Chartered Patent Agent.
70, Chancery Lane, London, W.C., Associate Agent.