Improvements connected with the Utilization of Ore Smelting Furnace Bye Products.
Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 19th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with the Utilization of Ore Smelting
Furnace Bye Products.
1 EDWARD NELSON, trading as F. McNeill & Co. of The Patent Felt Works,
Bunhill Row, in the City and County of London, Felt Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to the utilization of the bye products resulting from the
smelting of iron ores, and technically known as "slag" or "furnace slag," for the
purpose of manufacturing what is variously called silicate cotton, slag wool, or
mineral wool.
Hitherto, it has been the practice to manufacture silicate cotton, slag wool or
mineral wool from the molten slag as it issues from the smelting furnace, but only
a very small proportion of such molten slag has been utilized for this purpose, the
greater part being allowed to cool and harden. The cold and hard slag has been
utilized in various ways, principally for road making, and after pulverization, it has
been used in the manufacture of cements, but these uses by no means exhaust the
quantity of slag produced by the smelting of iron ores and its accumulation is a.
source of serious inconvenience to ironmasters.
By this invention I remelt the cold slag and when it is in a state of fusion I
blow it into fibres by a suitable steam or air jet which is caused to impinge upon it
as it flows from the furnace in which it has been fused. During the re-melting of
the slag, I add a suitable flux and, if required, the chemical equivalents of the
constituents lost or evolved as gas at its first cooling.
Dated this 19th day of December 1892.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements connected with the Utilization of Ore Smelting
Furnace Bye Products.
I, EDWARD NELSON trading as F. McNeill & Co. of The Patent Felt Works
Bunhill Row in the City and County of London, Felt Manufacturers, 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:—
This invention relates to the utilization of the bye products resulting from the
smelting of iron ores, and technically known as "slag" or "furnace slag," for the
purpose of manufacturing what is variously called silicate cotton, slag wool or
mineral wool.
Hitherto it has been the practice to manufacture silicate cotton, slag wool or
mineral wool from the molten slag as it issues from the smelting furnace but only a
very small proportion of such molten slag has been utilized for this purpose the
greater part being allowed to cool and harden. The cold and hard slag has been
utilized in various ways principally for road making and after pulverization it has
been used in the manufacture of cements, but these uses by no means exhaust the
quantity of slag produced by the smelting of iron ores and its accumulation is a
source of serious inconvenience to ironmasters.

page_text: According to this invention I take cold slag and add thereto silicate of aluminium
and a mixture consisting of 80 per cent. calcium carbonate and 20 per cent.
aluminium oxide. These materials I use in about the following proportions :-
Slag ...
***
Silicate of Aluminium from 3 to 5 cwt.
Mixture consisting of 80% from 3 to 6 cwt.
CaCo, and 20% Al,0,
20 cwt.
--
According to the quality
& composition of the
slag.
The materials are placed together in a suitable smelting furnace and are brought
to a state of fusion after which the molten mass is blown into fibres by a steam or
air jet, which is caused to impinge upon it as it flows from the furnace.
The mixture of calcium carbonate and aluminium oxide acts as a flux for the
slag while the silicate of aluminium adds to the vitreous character of the fused mass
whereby the fibres of the slag wool produced therefrom are much fiuer in texture
than would otherwise be the case.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
Silicate cotton or slag wool manufactured from cold slag, silicate of aluminium
and a mixture of calcium carbonate and aluminium oxide fused together in a
suitable furnace in about the proportions stated, the fused mass being subsequently
blown into fibres by a steam or air jet substantially as described.
Dated this 19th day of September 1893.
F. W. GOLBY,
36, Chancery Lane, W.C., Patent Agent for the Applicant.