Process of Manufacturing Briquets of Iron Ore or other Iron Compounds and Briquets thus Made.
Year: 1896

page_text: Date of Application (in the United Kingdom), 27th Oct., 1896
Complete Specification Left, 27th Oct., 1896-Accepted, 23rd Jan., 1897
COMPLETE SPECIFICATION.
Process of Manufacturing Briquets of Iron Ore or other Iron
Compounds and Briquets thus Made.
We LOUIS WILHELM ALWIN JACOBI, of 634 Drottninggatan, Engineer and
GUSTAF WALFRID PETERSSON Dr. Phil. of 16A Handtverkaregatan both of
Stockholm Sweden 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 production of briquets from pulverised or crushed
iron ores or other iron compounds. This is effected by exposing the ore or the
iron compound to the action of a suitable reducing agent and interrupting the
reduction, when a part of the iron ore or the iron compound has been transferred
into spongy iron. Thereupon the mass thus obtained is by means of pressure or
blows formed into pieces or briquets, the spongy iron obtained by the partial
reduction serving as binding agent.
The reduction may be carried out in different ways, for instance by means of
reducing gases or by means of pulverized solid carbonaceous matters, as charcoal
and the like, and by using exterior or interior heating at a suitable temperature.
The reduction can take place either in a stationary furnace or in a movable one.
The furnace is provided with particular means for effecting an intimate mixture
of the reducing agent and the iron ore or the iron compound.
The iron ore or iron compound, which has been partly reduced may also, after
having cooled to a suitable temperature, be exposed to the action of water or
steam, either alone or together with carbonic acid, acetic acid and the like, whereby
hydrates or salts of iron are formed, which compounds serve as binding agents at
the briquetting, taking place afterwards.
The briquets, produced as described above, possess a percentage of iron greater
than that of the raw material, besides which a less quantity of reducing agent is
required for the production of iron from these briquets than when producing the
same quantity of iron from an ore, possessing the percentage of iron of the raw
material. This circumstance materially increases the value of the product.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. Method of producing briquets of iron ore or other iron compounds, consisting
in partly reducing the pulverized or crushed iron ore or iron compound by inter-
rupting the reduction when the mass has been partly reduced to spongy iron
whereupon the mass by means of pressure or blows is formed into blocks or
briquets, in which the said spongy iron serves as binding agent.

page_text: 2. Method of producing iron ore briquets consisting in partly reducing the
pulverized or crushed iron ore or iron compound by interrupting the reduction
when the mass has been partly transferred into spongy iron as firstly claimed by
exposing the mass to the action of water or steam, either alone or together with
carbonic acid, acetic acid or the like and by subsequently pressing the product thus
obtained into blocks or briquets the hydrates or salts of iron obtained by the
treatment just mentioned serving as binding agents.
3. Briquets, produced in the way firstly and secondly claimed.
Dated this 26th day of October 1896.
JENSEN & SON
77 Chancery Lane, London, W.C., Patent Agents.