An Improved Treatment of Blast Furnace Slag or Scoria for the Manufacture therefrom of Hydraulic or similar Cement, or for other purposes requiring the use of Dry Granulated Slag.
Year: 1897

page_text: An Improved Treatment of Blast Furnace Slag or Scoria for the
Manufacture therefrom of Hydraulic or similar Cement, or for
other purposes requiring the use of Dry Granulated Slag.
I, THOMAS CHARLES HUTCHINSON, of Bryn-y-Mor, Saltburn-by-the-Sea, in the
County of York, Iron Master, do hereby declare the nature of this invention to be
as follows:-
My invention relates to the treatment of blast furnace slag or scoria to be used
in the manufacture of hydraulic or similar cement or for other purposes requiring
the use of dry granulated slag and effects improvements in the direction of obtain-
ing the requisite disintegration of the slag by a process which produces a slag
sand which is practically free from moisture and which can be used without the
further treatment hitherto necessary for the expulsion of moisture.
In the Specification of a prior Patent granted to me as dated 6th October 1887
and numbered 13534 I described a process for reducing the slag or scoria of a blast
furnace to a slag sand to be used for cement in which the slag was run in the
molten state into water to be partially submerged and again removed before the
initial heat was expended. By this process the disintegration of the slag was
effected with less absorption of moisture than by the ordinary process of total sub-
mersion and cooling in the water but further treatment for expulsion of moisture
was still necessary.
I have now discovered a process in which I disintegrate the slag by the aid of
steam as in my former process, but without the absorption of sufficient moisture
into the resulting slag sand to require further treatment.
In my improved process I run the slag along a duct or trough over which water is
discharged directly onto the stream of slag the quantity of water so brought into
contact with the slag being regulated so that sufficient steam is generated to
thoroughly disintegrate the slag in the manner required for the purpose of my
invention. By this process excess of moisture whether from a too great supply
of water, or from condensation of steam drains away beneath the slag and is not
absorbed into it. The effect of the stream of water on the slag is to reduce it to a
spongy cellular mass which accumulates in a heap as the process continues and
requires to be removed by mechanical means which may be of any convenient kind
adapted to the purpose as for instance a series of rakes mounted like scoops on a
wheel which is constantly revolving upon its axis in the direction for raking the
disintregated slag from the accumulating heap in front of the water flow.
Dated this 8th day of April 1897

page_text: An Improved Treatment of Blast Furnace Slag or Scoria for the
Manufacture therefrom of Hydraulic or similar. Cement, or for
other purposes requiring the use of Dry Granulated Slag.
I, THOMAS CHARLES HUTCHINSON, of Bryn-y-Mor, Saltburn-by-the-Sea, in the
County of York, Iron Master, 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:-
My invention relates to the treatment of blast furnace slag or scoria to be used
in the manufacture of hydraulic or similar cement or for other purposes requiring
the use of dry granulated slag and effects improvements in the direction of obtain-
ing the requisite disintegration of the slag by a process which produces a slag sand
which is practically free from moisture and which can be used without the further
treatment hitherto necessary for the expulsion of moisture. In the Specification
of a prior Patent granted to me as dated 6th October 1887 and numbered 13,534
I described a process for reducing the slag or scoria of a blast furnace to a slag sand
to be used for cement in which the slag was run in the molten state into water
to be partially submerged and again removed before the initial heat was expended.
By this the disintegration of the slag was effected with less absorption of moisture
than by the ordinary process of total submersion and cooling in the water but
further treatment for expulsion of moisture was still necessary. I have now dis-
covered a process in which I disintegrate the slag by aid of steam as in my former
process but without the absorption of sufficient moisture into the resulting slag
sand to require further treatment.
In my improved process I run the slag, along a duct or trough over which water
is discharged directly onto the stream of slag the quantity of water so brought into
contact with the slag being regulated so that sufficient steam is generated to
thoroughly disintegrate the slag in the manner required for the purpose of my
invention. By this process excess of moisture, whether from a too great supply
of water or from condensation of steam drains away beneath the slag and is not
absorbed into it. The effect of the stream of water on the slag is to reduce it to a
spongy cellular mass which accumulates in a heap as the process continues and
requires to be removed by mechanical means which may be of any convenient kind
adapted to the purpose as for instance a series of rakes mounted like scoops on a
wheel which is constantly revolving upon its axis in the direction for raking the
disintegrated slag from the accumulating heap in front of the water flow.
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:-
The process of treating blast furnace slag or scoria in which water is discharged
onto a stream of slag running in a duct or trough, the slag being thereby disin-
tegrated into a spongy cellular mass sufficiently free from moisture to require no
further treatment substantially as herein before described.
...… L: Ch
of Tanuary 1808
f Lanuary 1808
4333
G. J. CLARKSON,
Chartered Patent Agent, Stockton-on-Tees & Hull,
Agent for the Applicant.