Improvements in the Manufacture of Iron and Steel, having reference to the Utilization of Blast Furnace and other Slags in Conjunction with Finely Divided Oxides of Iron.
Year: 1891

page_text: Date of Application, 16th Feb., 1.91
Complete Specification Left, 16th Nov., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Iron and Steel, having reference
to the Utilization of Blast Furnace and other Slags in Conjunction
with Finely Divided Oxides of Iron.
I, WILLIAM HUTCHINSON of "The Ferns" Pennfields Wolverhampton Steel
Works Manager & I, FRANK WILLIAM HARBORD of Pennfields Wolverhampton
Metallurgist do hereby declare the nature of this invention for IMPROVEMENTS IN
THE MANUFACTURE OF IRON AND STEEL HAVING REFERENCE TO THE UTILIZA-
TION OF BLAST FURNACE AND OTHER SLAGS IN CONJUNCTION WITH FINELY
DIVIDED OXIDES OF IRON to be as follows:-
The object of our invention is the incorporation of finely divided oxide of iron,
such as "Blue Billy," hammer or roll scale & similar products with the molten slag
as it runs from blast furnace, cupola or other furnaces. The slag from Bessemer
converters or Siemers furnaces may also be used in a similar way.
The finely divided oxides may be incorporated with the slag by any suitable
mechanical means, either in ordinary slag bogies or in a special furnace into which
the slag may be allowed to flow the object being to obtain an ore in good mechanical
condition suitable for blast furnace & which at same time shall be as far as
possible self fluxing: the relative proportions of slag & oxide are adjusted
according to composition of each.
Dated this 13th day of February 1891.
WILLIAM HUTCHINSON.
FRANK WILLIAM HARBORD.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Iron and Steel, having reforence
to the Utilization of Blast Furnace and other Slags in Conjunction
with Finely Divided Oxides of Iron.
We,
WILLIAM HUTCHINSON of "The Ferns" Pennfields, Wolverhampton in
the County of Stafford Steel Works Manager and FRANK WILLIAM HARBORD of
Pennfields, Wolverhampton, aforesaid, Metallurgist 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 :-
Our invention relates to the utilization and application of blast furnace, cupola,
Bessemer converter open hearth furnace or other slags and of oxides of iron with
or without oxides of manganese.
as
We carry out our invention by incorporating finely divided oxides of iron such
"Blue Billy" hammer, or roll scale, powdery ores or oxide of manganese with
the molten slag as it runs from the furnace or while it is still in a molten condition,
the slag acting as an agglomerating material to hold the oxides and forming a
product highly suitable for use either alone or (preferably) mixed with the
ordinary ores for forming the charge of a blast or other furnace.
By thus utilizing the slag we are enabled to use over again in the blast furnace
the fluxing material such as the lime and alumina contained in the slag and at the
same time to use the finely divided oxides which have hitherto only been capable of.
employment in their powdery form in the blast furnace in very small quantities.
We are aware however that it has been before proposed to render these oxides
useful by treating them in various ways such as by compression in moulds with
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page_text: adhesive material, but to the best of our knowledge none of these suggestions have
been attended with any practical result.
In carrying out our invention we prefer to allow the slag from the furnace or
converter to run into a bogey or other suitable vessel in which is placed or added
considerable quantities of the desired oxide.
This is thoroughly mixed or rabbled either by hand or by suitable mechanism
further additions of the oxide being made until the slag has taken up the desired
percentage or until it commences to solidify. In some cases where it is required to
incorporate large quantities of oxides we find it advisable instead of using a bogey
to have a suitable furnace placed in a convenient position and heated by waste or
other gases or in other ways, in which the oxides may be first fused or highly
heated, the slag being run directly onto same from the furnace or converter, and
the mass being mixed or rabbled and fresh oxides or slag added until the desired
percentage is obtained, the result being a product the mechanical condition of which
is suitable in every way for blast furnace purposes either if used in a broken up or
moulded state. The following is an analysis of a Cleveland slag which will serve
as an illustration of our invention :-
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Agent for the Applicants.