Improved Method or Means of Desulphurising Castings or Alloys of certain Metals.
Year: 1892

page_text: PROVISIONAL SPECIFICATION.
Improved Method or Means of Desulphurising Castings or Alloys of
certain Metals.
I, PAUL ROSSIGNEUX, of 23 Rue Hamelin, Paris, in the Republic of France,
Inventor, do hereby declare the nature of this invention to be as follows:-
My process is applicable to castings or alloys of iron, nickel, cobalt and copper
containing any two or more of these metals combined together, 2 and 2, 3 and 3, or
all together it enables the percentage of sulphur in castings, that is to in
say,
alloys containing carbon, silicon, and sulphur, to be reduced to 0.01 per cent.
It consists in introducing into these castings a certain quantity of the following
metals in a metallic state; manganese, aluminium, magnesium, sodium; these four
metals, having a greater affinity for sulphur than iron, nickel, cobalt, and copper,
attract the sulphur and form a slag composed largely of metallic sulphur, and
which collects on the surface of the molten metal.
In carrying out my invention, I proceed in the following manner :-
The molten metal is taken in a liquid condition on its exit from the apparatus in
which it has been produced, or even it is re-melted after cooling, in
reverberatory furnace.
cupola or
From thence it is run either into a reverberatory furnace, or into a recipient of a
similar form to a Bessemer converter heated or otherwise; if the operation be per-
formed with a sufficient mass of metal, it is needless to heat it; in the contrary
case, the chamber may be heated either with wood, or wood charcoal, or with gas,
in such a way as not to introduce sulphur into the metal.
It
The reagent, that is the manganese, aluminium, magnesium or sodium, employed
alone or in combination with one another, is introduced into the molten metal.
is gently agitated and, when the slag has collected, it is drawn off, and the purified
metal is run off separately..
This process allows an alloy of iron and nickel in particular, free from sulphur
to be obtained, which may then be submitted to an oxidising action in a rever-
beratory furnace, or Bessemer converter, in such a way as to scarify the iron, the
manganese and the excess of reagent employed, and to obtain finally very pure
nickel free from sulphur, and containing only traces of iron, and suitable for all
present uses to which nickel, manufactured by roasting and reduction of the matte,
is put.
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Masak 1800
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.

page_text: "
COMPLETE SPECIFICATION.
Improved Method or Means of Desulphurising Castings or Alloys of
Certain Metals.
I, PAUL ROSSIGNEUX, of 23, Rue Hamelin, Paris in the Republic of France,
Inventor, 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 process is applicable to castings or alloys of iron, nickel, cobalt and copper
containing. any two or more of these metals combined together, that is, 2 and 2,
3 and 3, or all together; it enables the percentage of sulphur in castings, that is to
say, in alloys containing carbon, silicon, and sulphur, to be reduced to 001 per cent.
It consists in introducing into these castings a certain quantity of the following
metals in a metallic state manganese, aluminium, magnesium, sodium; these four
metals, having a greater affinity for sulphur than iron, nickel, cobalt and copper,
attract the sulphur and form a slag composed largely of metals and sulphur, which
collects on the surface of the molten metal.
The quantity of reagent which I add to the metal to purify it is naturally in
proportion to the quantity of sulphur in it, and is calculated so that the total
amount of sulphur may be changed into sulphate of manganese, sulphate of:
aluminium, sulphate of magnesium, or sulphate of sodium, a slight excess of the
reagent being added in order to make certain of the reaction and to allow for the
portion of the reagent which is oxidised during the operation before having been
able to act usefully on the bath. The total quantity which I add and which is
sufficient to completely carry out the desulphurisation is for one part of the sulphur
contained in the metal to be purified, 2 parts of manganese or 2 of aluminium
or 2 of magnesium or 3 parts of sodium. Thus a casting containing 2 per cent. of
sulphur can be very well desulphurised with 5 per cent. of manganese.
In carrying out my invention, I proceed in the following manner -
The molten metal is taken in a liquid condition on its exit from the apparatus in
which it has been produced, or even it is re-melted after cooling, in a cupola or
reverberatory furnace.
From thence it is run either into a reverberatory furnace, or into a recipient of a
similar form to a Bessemer converter heated or otherwise; if the operation be per-
formed with a sufficient mass of metal, it is needless to heat it; in the contrary
case, the chamber may be heated either with wood, or wood charcoal, or with gas,
in such a way as not to introduce sulphur into the metal. The reagent, that is, the
manganese, aluminium, magnesium or sodium, employed alone or in combination
with one another, is introduced into the molten metal. It is gently agitated and,
when the slag has collected, it is drawn off, and the purified metal is run off
..separately.
This process allows an alloy of iron and nickel in particular, free from sulphur,
to be obtained, which may then be submitted to an oxidising action in a rever-
beratory furnace, or Bessemer converter, in such a way as to scarify the iron, the
manganese and the excess of reagent employed, and to obtain finally very pure
nickel free from sulphur, and containing only traces of iron, and suitable for all
present uses to which nickel, manufactured by roasting and reduction of the matte,
is put.
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 :-
The improved method or means of desuluburizing costines

page_text: metals which consists in eliminating the sulphur from the alloys, above set forth, by
means of manganese, aluminium, magnesium and sodium, employed in the metallic
state, and either alone or in combination, substantially as hereinbefore described.
Dated this 10th day of March 1892.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.