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US3774892A - Apparatus for vacuum dezincing lead - Google Patents

Apparatus for vacuum dezincing lead Download PDF

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Publication number
US3774892A
US3774892A US00222626A US3774892DA US3774892A US 3774892 A US3774892 A US 3774892A US 00222626 A US00222626 A US 00222626A US 3774892D A US3774892D A US 3774892DA US 3774892 A US3774892 A US 3774892A
Authority
US
United States
Prior art keywords
kettle
jacket
annular
bearing flange
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00222626A
Other languages
English (en)
Inventor
G Althabegoity
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Miniere et Metallurgique de Penarroya
Original Assignee
Societe Miniere et Metallurgique de Penarroya
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Miniere et Metallurgique de Penarroya filed Critical Societe Miniere et Metallurgique de Penarroya
Application granted granted Critical
Publication of US3774892A publication Critical patent/US3774892A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00—Obtaining lead
    • C22B13/06—Refining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Definitions

  • ABSTRACT A conventional kettle for the vacuum dezincing of lead is conventionally provided with an outer bearing flange for supporting the kettle on a frusto-conical.
  • Thisapparatus is further provided with a ringshaped space outside the kettle which extends from thetop of the kettle to the bearing flange and which is closed to the ouside of the kettle but open to the inside of the kettle through an annular clearance.
  • This ring-shaped space reduces the tendency of the kettle to. crack between its upper edge and the bearing flange, and thereby increases the useful life of the ket tle.
  • the kettles which are used for carrying out this method are generally provided with an outer bearing flange.
  • the latter rests on the upper edge of a frustoconical frame which, inturn, leans on the basement of the installation and limits to a ceraain extent the stresses resulting from the thermal dilatation.
  • Such a kettle is also provided at its upper edge with a water-cooled'ring-shaped jacket on which the periphery of its cover can rest with interposition of a vacuumtight o-ring.
  • one objective of the present invention is to provide an improved kettle for vacuum dezincing of lead with a longer average life than the known devices.
  • Another objective of the invention is to provide such an improved kettle in a simple and inexpensive way.
  • ()ne more object of the invention is to provide such an improved kettle which can result from the transformation of an existing one.
  • a ringshaped space is providedbetween its upper edge and its bearingflange, said space being air-tight with respect to the outside of the kettle and connected with the inside through an annular clearance.
  • said ring-shaped space is filled with a thermal insulation product of any known type, like for instance asbestos or rock wool.
  • the outside part of said annular space is formed by a cylindrical sleeve with the same vertical axis as the kettle which is integral with the bearing flange, at its lower end, and with the supporting surface for the cover, at its upper end.
  • said supporting surface consists, in a known manner, in the flat upper part of an annular passage with a rectangular cross-section through which water circulates. According to the usual terminology, such a passage will be called a jacket" hereinbelow.
  • said cylindrical sleeve is integral with the annular jacket along its base, and this base of the jacket overhangs the upper edge of the kettle with a clearance which is sufficient for connecting the annular space according to the invention with the inside of the kettle.
  • the cylindrical sleeve is also integral with the annular jacket along its base, but the upper wall of this jacket is now substantially at the same level as the upper edge of the kettle.
  • FIG. 1 shows in axial cross-section, a partial
  • FIG. 2 shows on the same manner a view of another embodiment of the apparatus according to the invention.
  • reference numeral 1 shows the vacuum dezincing kettle itself surrounded by a bearing flange 2 which is welded to the wall of the kettle. The weight of the latter is transferred to a basement (not shown) by a frusto-conical frame 3. Means are provided (not shown) for bringing the metal contained in kettle l to. j
  • the device comprises also a cover 4 the lower side of which is integral with a dove-tailed fixation ring 5 embedded in a vacuum-tight o-ring 6.
  • This, o-ring rests on an annular hollow jacket 7 with a rectangular cross:
  • the lower wall 7a of jacket 7 is welded to the upper edge of 'a cylindrical sleeve 9 which surrounds kettle l at a distance of 5 cm, for example.
  • the lower edge of sleeve 9 is in turn welded to bearing flange 2,
  • O-ring 6 is preferably on the vertical above sleeve 9, approximately along a median circumference of annular jacket 7.
  • the annular space 10 thus provided between outer surface of kettle 1, lower wall 7a of jacket 7, internal surface of sleeve 9 and bearing flange 2 is filled with a thermal insulation product 11 like rock wool. It communicates with the inside of kettle 1 by a clearance 12 provided between the edge of kettle 1 and the lower wall 7a of jacket 7.
  • a clearance 12 provided between the edge of kettle 1 and the lower wall 7a of jacket 7.
  • the diameter of internal wall 7b of jacket 7 must be slightly smaller than the internal diameter of kettle 1.
  • jacket 7 Internal wall 7b of jacket 7 is preferably provided with a downwardly extending protection sleeve 13 which covers the clearance 12 and the upper part of kettle l and prevents molten metal from entering annular space 10. Moreover, a cylindrical metal sheet 14 can be mounted in annular space 10 to leave a free space between thermal insulation 11 and sleeve 9 Preferably, the surface of the molten metal pool in kettle l is located about 20 cm under the lowerwall 7b. of jacket 7.
  • FIG. 2 On the embodiment of FIG. 2, the members identical to those of FIG. 1 have been shown by the same refer.- ence numerals.
  • the internal face 71) of jacket 7 surrounds the upper part of kettle l, the upper faceof this jacket being substantially at the same level as the upper edge of the kettle.
  • Clearance 12 is now provided between said internal face 712 and the external surface of kettle 1.
  • the protection sleeve is now replaced by an annular plate 15 welded by its outer edge on the flat upper surface of jacket 7 in order to cover the wall of kettle 1 without contacting it.
  • Said annular plate 15 can beprovicledinternally with a protection sleeve ll6extendingdownwardly in kettle 1 and analogous to protectionsleeve 13 of FIG. 1.
  • An apparatus for the vacuum dezincing of lead comprising in combination: a kettle; an annular bearing flange rigidly mounted on the outer surface of said kettle; means for supporting said bearing flange on the ground; means for heating said kettle; a cylindrical sleeve coaxial with the kettle extending upwardly from said bearing flange and rigidly mounted on it substantially along its external edge; an annular water-cooled jacket with a rectangular cross-section fixedly mounted by its base along the upper edge of said sleeve, said annular water-cooled jacket, the outer wall of said kettle, said annular bearing flange and said cylindrical sleeve cooperating to form an annular space, said jacket positioned so that a clearance is maintained between the inside of said kettle and the annular space; a thermal insulating material in said annular space; a watercooled cover for said kettle; and an annular sealing member detachably mounted on the lower face of said cover and resting on the upper face of said jacket.
  • said jacket further comprises an internally extending annular plate fixedly mounted on the jacket upper face and a downwardly extending protecting cylindrical wall coaxial with the kettle and mounted along an inner portion of said annular plate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Vapour Deposition (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Thermal Insulation (AREA)
US00222626A 1971-02-03 1972-02-01 Apparatus for vacuum dezincing lead Expired - Lifetime US3774892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717103539A FR2124073B1 (de) 1971-02-03 1971-02-03

Publications (1)

Publication Number Publication Date
US3774892A true US3774892A (en) 1973-11-27

Family

ID=9071303

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222626A Expired - Lifetime US3774892A (en) 1971-02-03 1972-02-01 Apparatus for vacuum dezincing lead

Country Status (16)

Country Link
US (1) US3774892A (de)
AT (1) AT312948B (de)
BE (1) BE778799A (de)
BG (1) BG19196A3 (de)
BR (1) BR7200619D0 (de)
CA (1) CA952307A (de)
CS (1) CS162774B2 (de)
ES (1) ES399291A1 (de)
FR (1) FR2124073B1 (de)
GB (1) GB1326175A (de)
IT (1) IT949401B (de)
LU (1) LU64703A1 (de)
NL (1) NL154556B (de)
RO (1) RO61847A (de)
SU (1) SU419046A3 (de)
YU (1) YU34560B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232486A (en) * 1991-04-23 1993-08-03 Brunswick Mining And Smelting Corporation Limited One step process for the treatment of Parkes desilvering crust to recover zinc and produce a suitable feed for cupellation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615706A (en) * 1949-08-05 1952-10-28 Broken Hill Ass Smelter Distillation of metals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615706A (en) * 1949-08-05 1952-10-28 Broken Hill Ass Smelter Distillation of metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232486A (en) * 1991-04-23 1993-08-03 Brunswick Mining And Smelting Corporation Limited One step process for the treatment of Parkes desilvering crust to recover zinc and produce a suitable feed for cupellation

Also Published As

Publication number Publication date
SU419046A3 (de) 1974-03-05
NL154556B (nl) 1977-09-15
RO61847A (de) 1977-05-15
CA952307A (en) 1974-08-06
IT949401B (it) 1973-06-11
FR2124073B1 (de) 1974-02-15
FR2124073A1 (de) 1972-09-22
LU64703A1 (de) 1972-06-30
AT312948B (de) 1974-01-25
GB1326175A (en) 1973-08-08
CS162774B2 (de) 1975-07-15
YU34560B (en) 1979-09-10
BE778799A (fr) 1972-05-30
ES399291A1 (es) 1974-12-16
BR7200619D0 (pt) 1973-06-14
BG19196A3 (bg) 1975-04-30
NL7201201A (de) 1972-08-07
YU23972A (en) 1979-02-28

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