An Improved Method of Converting Pulverous Metallic Oxides into Solid Ores.
Year: 1892

page_text: Date of Application, 15th Aug., 1892
Complete Specification Left. 16th Mar.. 1893-Accepted. 17th June. 1893
PROVISIONAL SPECIFICATION.
An Improved Method of Converting Pulverous Metallic Oxides
into Solid Ores.
I, NIKOLAUS HENZEL, Engineer of 91 Rhein Strasse, Wiesbaden, Germany,
do hereby declare the nature of this invention to be as follows:-
I have found that pulverous metallic oxides, such for instance as those obtained
by roasting pyritic dust or by the extraction of copper from finely ground copper-
ores, may be prepared for smelting purposes in a simple and advantageous manner
by treating the same in a stirring apparatus and in well moistened condition with a
suitable proportion of silicates of alumina.
This moist compound evenly mixed, possesses the peculiarity that when exposed
as formless lumps to the action of the top flame of a furnace it burns hard with
such rapidity that hardly a grain is swept away by the current of gas.
The mass may also be hardened by exposure to the air previous to its treat-
ment in the blast furnace; the hardening process in this case being also a very
rapid one.
The oxydes solidified by the action of the top flame of a furnace are still of
such a porousness as to be susceptible to the action of reducing carbonising
gases.
The silicate of alumina in the mass increases the reduction of SiO, i.e. the
combination of Si with the metal. The amount of silicate of alumina added
depends on the amount of silicon required to be added to the metal and may be
easily and cheaply obtained in the form of clay.
Dated the Fifteenth day of August 1892
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Method of Converting Pulverous Metallic Oxides
into Solid Ores.
I, NIKOLAUS HENZEL, Engineer of 91 Rhein Strasse, Wiesbaden, Germany, 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:-
I have found that pulverous metallic oxides, such for instance as those obtained
by roasting pyritic dust or by the extraction of copper from finely ground copper
ores, may be prepared for smelting purposes in a simple and advantageous manner
by treating the same in a stirring apparatus and in well moistened condition with a
suitable proportion of silicates of alumina, for instance, ordinary clay.
This moist compound evenly mixed, possesses the peculiarity that when exposed
as formless lumps to the action of the top flame of a furnace it burns hard with
such rapidity hardly a grain is swept away by the current of gas.
The mass may also be hardened by exposure to the air previous to its
treatment in the blast furnace, the hardening process in this case being also a very
rapid one.
The oxydes solidified by the action of the top flame of a furnace are still of such
a porousness as to be susceptible to the action of reducing carbonising gases.
The silicate of alumina added to the mass assists the reduction of SiO, or in
other terms the combination of silicon with the metal. The amount of silicate of
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page_text: alumina added depends on the amount of silicon to be incorporated into the metal.
If for instance it is intended to use such oxides together with other iron ores to
produce pig iron low in silicon an addition of 5 per cent. of silicate of alumina will
be sufficient. If, however, it is intended to produce from such oxides which are
practically free from phosphorus, and from such oxides alone, first quality hematite
pig, then the mixture is to be made with about ten per cent. of silicate of alumina
and the hard lumps obtained represent a hematite ore containing about 59 to
60 per cent. of iron and 10 to 11 per cent. of residue insoluble.
If ferrosilicon is to be produced, containing fourteen per cent. and more of
silicon then such oxides become a most suitable ore by stirring them with about
30 O per cent. of silicate of alumina. In this case the ore obtained contains about
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
The herein described method of preparing pulverous burnt ore for the blast
furnace process by stirring them with silicates of alumina in moist state.
Dated the 16th day of March 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.