US2936234A - Metallurgy of zinc - Google Patents

Metallurgy of zinc Download PDF

Info

Publication number
US2936234A
US2936234A US700906A US70090657A US2936234A US 2936234 A US2936234 A US 2936234A US 700906 A US700906 A US 700906A US 70090657 A US70090657 A US 70090657A US 2936234 A US2936234 A US 2936234A
Authority
US
United States
Prior art keywords
zinc
furnace
vapor
liquid
condensing
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
US700906A
Other languages
English (en)
Inventor
Wainer Eugene
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.)
Horizons Inc
Original Assignee
Horizons Inc
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 Horizons Inc filed Critical Horizons Inc
Priority to US700906A priority Critical patent/US2936234A/en
Priority to BE573651A priority patent/BE573651A/fr
Application granted granted Critical
Publication of US2936234A publication Critical patent/US2936234A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/04—Obtaining zinc by distilling
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/32—Refining zinc

Definitions

  • This invention relates to the pyrometallurgy of zinc. More particularly it relates to the recovery of pure zinc metal from its vapor form. Since zinc is one of the more volatile elements, zinc is commonly recovered from impure metallic residues or from reducible zinc compounds by converting the zinc metal to a vapor, or by reducing the compound to metallic zinc and converting the zinc so formed into zinc vapor; Ineither event the undesired impurities or compound forming elements are separated from the zinc by the vaporization of the zinc leaving behind in either liquidor solid form the impurities asso' ciated with the source material.
  • substantially pure zinc may be recovered in the form of liquid zinc by producing zinc vapor from any suitable source material and bringing the zinc in the vapoi' phase into contact with a condensing surface located within the furnace chamber wherein the vapor is produced.
  • the condensing surface must be maintained at a critical temperature, and the liquid droplets formed thereon must be collected as they form, by means of a suitable apparatus whereby oxidation or other chemical reaction of the metal collected is virtually eliminated to the point of being non-existent.
  • the critical temperatures of the surface on which the vapor is condensed have been found to lie between 530 C.
  • the condensing surface may be formed of graphite or other inert forms of carbon, or SiC or even a ceramic material.
  • the condensing surface is located in the free space into which the zinc is vaporized from a pool of molten material below the free space or it may form a boundary of that space, for instance when it forms a wall portion of the furnace or reaction vessel.
  • Figure 1 is a fragmentary view in section of one embodirnent.
  • FIGS 2 and 3 are similar fragmentary sectional views of additional embodiments.
  • FIG. 1 there is shown schematically a furnace pot 10 and one or more heaters 12 adapted to melt a charge of impure metallic zinc in the pot 10.
  • a free space 20 into which Zinc vapor passes directly from the pool of molten zinc, whenever the conditions of temperature and pressure in the furnace are such that zinc can exist in the form of a vapor.
  • the furnace it is arranged so that a finger-like member 16 extends well into a free space 20 above the melt.
  • the distance between the portion of finger 16 closest to melt 14 is no greater than that required to avoid any splashing of material from the melt 14 onto the surface 16.
  • the finger is provided with means 17 for controlling its temperature so that it may be maintained at any temperature at or above the melting point of zinc and specifically at temperatures between 530 C. and 550 C.
  • the condensing finger may be hollow and may be provided with an electrical resistor positioned in a centrally located cavity, in the manner shown in U.S. Patent 2,781,189.
  • a heating or cooling fluid may be passed through a hollow heat exchanger positioned in the finger and forming a portion of a suitable thermostatically controlled circuit.
  • Other means for maintaining the temperature of the outer surface of finger 16 within the range of 530' C. and 550 C. will be readily apparent and I do not wish to be restricted to any specific means described merely by way of illustration.
  • a trough 22 which slopes downwardly and out wardly from the center of the furnace it) and extends to a catch basin 23 in which the zinc is collected.
  • suitable liquid seals (not shown), the evolution of other contents of the furnace may be prevented.
  • the molten metal may be converted to pigs by casting as is conventional in this art.
  • Suitable means (not shown) may be provided for draining any sludgeor other accumulation of impurities from the furnace either intermittently or continuously.
  • the condensing surface may be supported from a cover 18, as shown in Figure 1 or it may be attached to a wall 24 ofqthe furnace as shown in Figure 2 or any other suitable form of support may be provided for the condensing finger to accommodate it to a location in the vapor filled space closely adjacent to the melt surface.
  • the walls of the furnace and particularly the portion 26 of these walls above the level where the furnace contents may splash on them serves as the condensing surface.
  • this portion of the walls is provided with heat transfer means 28 for maintaining the inner surface of this portion of the walls at a temperature between 530 C. and 550 C., temperatures at which zinc vapor evolved from the melt will condense rapidly to liquid zinc and above the temperature at which the vapor is condensedto a solid zinc powden'
  • Extending through the wall and about the periphery of the vessel is an annular trough 30 in which the droplets of zinc collect after they have run down portion 26 of the walls 24. From trough 30, the molten metal is conveyed to a spout and thence to a collecting apparatus or casting machine.
  • a method of producing pure zinc metal from zinccontaining materials of the group consisting of impure metallic residues and reducible zinc compounds which comprises: forming a molten body of such zinc-containing material in a furnace, maintaining a temperature in the furnace at which zinc vapor is f-ormedjn a free space above the body of molten material, maintaining at least one condensing surface in said free space at a temperature between 530 C. and 550 C.; condensing metallic zinc as a liquid on said surface, and recovering the liquid zinc condensate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US700906A 1957-12-05 1957-12-05 Metallurgy of zinc Expired - Lifetime US2936234A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US700906A US2936234A (en) 1957-12-05 1957-12-05 Metallurgy of zinc
BE573651A BE573651A (fr) 1957-12-05 1958-12-05 Procédé de récupération du zinc pur.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US700906A US2936234A (en) 1957-12-05 1957-12-05 Metallurgy of zinc

Publications (1)

Publication Number Publication Date
US2936234A true US2936234A (en) 1960-05-10

Family

ID=24815315

Family Applications (1)

Application Number Title Priority Date Filing Date
US700906A Expired - Lifetime US2936234A (en) 1957-12-05 1957-12-05 Metallurgy of zinc

Country Status (2)

Country Link
US (1) US2936234A (fr)
BE (1) BE573651A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147327A (en) * 1960-03-17 1964-09-01 Metallurgical Processes Ltd Blast furnaces for smelting zinc
DE1558430B1 (de) * 1966-01-07 1971-04-15 Soc D Forges Et Ateliers Du Cr Verfahren und anlage zur gewinnung von zink aus zinkreichen abgasen

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251906A (en) * 1940-01-29 1941-08-12 Dow Chemical Co Condensation of magnesium vapor
US2422967A (en) * 1944-05-25 1947-06-24 St Joseph Lead Co Refining of lead
US2457546A (en) * 1945-12-05 1948-12-28 New Jersey Zinc Co Process for condensing zinc vapor
US2564337A (en) * 1948-11-02 1951-08-14 Battelle Development Corp Production of refractory metals
US2720456A (en) * 1949-08-05 1955-10-11 Broken Hill Ass Smelter Distillation of metals
US2724644A (en) * 1953-09-03 1955-11-22 Astral Soc Method for condensing metal vapors directly to their liquid state
US2781189A (en) * 1952-03-17 1957-02-12 Soberma Apparatus for condensing metals to the liquid state
US2805935A (en) * 1953-04-09 1957-09-10 Soberma Process for the manufacture of magnesium

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251906A (en) * 1940-01-29 1941-08-12 Dow Chemical Co Condensation of magnesium vapor
US2422967A (en) * 1944-05-25 1947-06-24 St Joseph Lead Co Refining of lead
US2457546A (en) * 1945-12-05 1948-12-28 New Jersey Zinc Co Process for condensing zinc vapor
US2564337A (en) * 1948-11-02 1951-08-14 Battelle Development Corp Production of refractory metals
US2720456A (en) * 1949-08-05 1955-10-11 Broken Hill Ass Smelter Distillation of metals
US2781189A (en) * 1952-03-17 1957-02-12 Soberma Apparatus for condensing metals to the liquid state
US2805935A (en) * 1953-04-09 1957-09-10 Soberma Process for the manufacture of magnesium
US2724644A (en) * 1953-09-03 1955-11-22 Astral Soc Method for condensing metal vapors directly to their liquid state

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147327A (en) * 1960-03-17 1964-09-01 Metallurgical Processes Ltd Blast furnaces for smelting zinc
DE1558430B1 (de) * 1966-01-07 1971-04-15 Soc D Forges Et Ateliers Du Cr Verfahren und anlage zur gewinnung von zink aus zinkreichen abgasen

Also Published As

Publication number Publication date
BE573651A (fr) 1959-04-01

Similar Documents

Publication Publication Date Title
US3251676A (en) Aluminum production
EP1273330B1 (fr) Procede de purification par sublimation et appareil associe
KR910001489B1 (ko) 질코늄 또는 하프늄의 제조방법
US2816828A (en) Method of producing refractory metals
US3295960A (en) Method of treating metal
US2778726A (en) Purification of refractory metals
US2936234A (en) Metallurgy of zinc
US3066010A (en) Purification of metal chlorides
US3288593A (en) Purification of metals
US2881067A (en) Method of producing powder metals
US2165742A (en) Process for separating magnesium and like metals which sublime from their ores and compounds
US2773787A (en) Production of group iv-a metals
US2130886A (en) Method of and apparatus for vaporization
US2758831A (en) Lined metal reduction apparatus
US4242136A (en) Process for producing metallic zirconium
US2513339A (en) Process of purifying aluminum by distillation of mixtures thereof with other metals
US3778044A (en) Method and apparatus for recovery and refining of zinc
US2265284A (en) Melting copper
US3015557A (en) Method of refining metals
US5232486A (en) One step process for the treatment of Parkes desilvering crust to recover zinc and produce a suitable feed for cupellation
US2463396A (en) Distillation of titanium tetrachloride
USRE24821E (en) Method of producing metals by decomposition of halides
US3085855A (en) Process for the production of niobium pentachloride
US3290141A (en) Aluminum production
US3015556A (en) Method of refining metals