to Obtain Pigments and Sulphate of Lime.
Year: 1885

page_text: to Obtain Pigments and Sulphate of Lime.
We GEORGE LLOYD WIGG, MATTHEW STEELE, and WALTER JOHN WIGG, all of
the Old Quay Copper and Alkali Works Runcorn in the County of Chester,
Manufacturers do hereby declare the nature of our said invention for "IMPROVE-
MENTS IN PLANT OR APPARATUS TO BE USED IN THE TREATMENT OF RESIDUALS
FROM COPPER WORKS AND CHLORINE MANUFACTURE TO OBTAIN PIGMENTS AND
SULPHATE OF LIME to be as follows:-
"
The object of the invention is to provide compact plant to be used in the
production economically of pigments and sulphate of lime from residuals such as
sulphate of iron liquors from copper and other works, purple ore or blue billy, and
chloride of calcium liquors obtained as a residual mainly in the manufacture of
chlorine.
Plant under our invention consists essentially of groups of apparatus of novel
arrangement combined to form plant for the production of the substances named.
The first part relates to apparatus for the treatment of residuals by precipitating
decanting and washing, and consists in combining with collecting tanks precipitating
and washing vessels provided with mechanical agitators so arranged and provided
with connections and valves that the contents can be run from one part of the
apparatus to another by gravitation.
The second part relates to apparatus for oxidizing and filtering precipitated iron,
and consists in combining oxidizing apparatus such as the well known Weldon
oxidizer with a collecting vessel pump and filter press and reverberatory furnace.
The apparatus is preferably arranged so that the precipitate from the first
apparatus shall be delivered by means of a pump to the oxidizer.
The third part relates to grinding and pulverizing oxidized iron, and consists in
the combination of horizontal millstones, a washing vessel, a drying bed, a lixiviator
and a roller mill.
Under the fourth part we combine together the apparatus described under the
first and second heads.
Under the fifth part we combine together the apparatus described under the first
second and third heads,
J. T. KING,
Per J. Richman,
Agent for the Applicants,

page_text: Improvements in Plant or Apparatus to be Used in the Treatment
of Residuals from Copper Works and Chlorine Manufacture
to Obtain Pigments and Sulphate of Lime.
We GEORGE LLOYD WIGG MATTHEW STEELE and WALTER JOHN WIGG, all of
the Old Quay Copper and Alkali Works Runcorn in the County of Chester
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 :-
: The object of the invention is to provide compact plant to be used in the
production economically of pigments and sulphate of lime from residuals such as
sulphate of iron liquors from copper and other works, purple ore or blue billy and
chloride of calcium liquors obtained as a residual mainly in the manufacture of
chlorine.
Plant under our invention consists essentially of groups of apparatus of novel
arrangement combined to form plant for the production of the substances named.
The first part relates to apparatus for the treatment of residuals by precipitating
decanting and washing and consists in combining with collecting tanks precipitating
and washing vessels provided with mechanical agitators so arranged and provided
with connections and valves that the contents can be run from one part of the
apparatus to another by gravitation.
The second part relates to apparatus for oxidizing and filtering precipitated iron
and consists in combining oxidizing apparatus such as the well known Weldon
oxidizer with a collecting vessel pump and filter press and reverberatory furnace.
The apparatus is preferably arranged so that the precipitate from the first apparatus
shall be delivered by means of a pump to the oxidizer.
The third part relates to grinding and pulverizing oxidized iron and consists in
the combination of horizontal millstones, a washing vessel, a drying bed, a lixiviator
and a roller mill.
Under the fourth part we combine together the apparatus described under the
first and second heads.
Under the fifth part we combine together the apparatus described under the first
second and third heads.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an elevation, and fig. 2 a plan of apparatus under our invention in which
the groups under the first second and third heads are combined as set forth under
the fifth head.
The first group consists essentially of collecting tanks a a¹ a², precipitating
vessels band washing vessels c c¹ c², & pumps. Connection is made between the
tanks and vessels by means of spouts and valves e, f mechanical agitators.
The above first part of my apparatus is used as follows:-Waste or residual
chloride of calcium and sulphate of iron liquors are collected in the tanks a a¹ and
mill of lime in the topl
The chloride of calcium is run into the vessel h until

page_text: it is about half full, then an equal amount of sulphate of iron is run on the top of
it, the latter being heavier than the former admixture and precipitation is thereby
facilitated. The filtrate consisting mainly of chloride of iron is then run into the
vessel c where about one twelfth of its weight of milk of lime is mixed with it, a
precipitate of oxide of iron being thereby formed. The filtrate is run off and the
precipitate or sludge is agitated and washed by means of water run into the said
vessel c.
The precipitate of sulphate of lime obtained in the vessel b is run into the
vessel c where it is washed with hydrochloric acid and is then run into the washing
vessel c³ where it is agitated and washed with water. The precipitate is then dryed
in a filter press, or in any convenient way, and is used for pearl hardening, or it
may be heated in addition to being dryed and used for Parian lime.
The vessel c¹ and c² are not used if it is not desired to treat the precipitate from
the vessel b.
Under the second part h indicates the space occupied by oxidizing apparatus such
as the Weldon plant, is a washing and storing vessel, and j. k. are a pump and
filter connected through the tank 1, m reverberatory furnace, e connections aud
valves between the different parts of the apparatus.
The action is as follows:-The sludge from c¹ is forced by the pump & into the
oxidizer h where it is oxidized and run through the connections e into the collecting
vessel i. The said vessel is supplied with hot water from any convenient source
and serves also as a washer. The washed and oxidized iron is delivered from the
vessel by the pumpj either directly to the filter press k or to a tank / whence it
descends to the filter press by gravity. The tank between the vessel i and the
pump j gives additional storage room, m reverberatory furnace to which the cakes
of filtered iron oxide are conveyed and heated until the required colour is
obtained.
Under the third part, n are horizontal millstones, o washing vessel, p drying bed,
qa lixiviater, and a roller mill.
The oxidized iron from the reverberatory furnace is ground under the stones n,
then washed with hot water in the vessel o afterwards dryed on the bed p, lixiviated
in the machine q which is of usual construction and finally reground in the roller
mill r to the required fineness.
After treatment in apparatus as set forth in the first or first and second parts
the required operations may be carried on in any suitable apparatus.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed we declare that what
we claim is:-
Plant or apparatus grouped substantially as set forth under any of the herein
five heads for the purposes set forth.