DE19805893A1 - Precious metal especially gold recovery from slags and melting furnace residues - Google Patents

Precious metal especially gold recovery from slags and melting furnace residues

Info

Publication number
DE19805893A1
DE19805893A1 DE1998105893 DE19805893A DE19805893A1 DE 19805893 A1 DE19805893 A1 DE 19805893A1 DE 1998105893 DE1998105893 DE 1998105893 DE 19805893 A DE19805893 A DE 19805893A DE 19805893 A1 DE19805893 A1 DE 19805893A1
Authority
DE
Germany
Prior art keywords
precious metals
slags
extraction
melting furnace
precious metal
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.)
Withdrawn
Application number
DE1998105893
Other languages
German (de)
Inventor
Wiener
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1998105893 priority Critical patent/DE19805893A1/en
Publication of DE19805893A1 publication Critical patent/DE19805893A1/en
Withdrawn legal-status Critical Current

Links

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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
    • 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
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C22B11/021—Recovery of noble metals from waste materials
    • C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

Precious metals are recovered from slags, melting furnace residues, volcanic materials and/or sulfidic ores by repeated cycles of comminution, flotation, high temperature enrichment and higher temperature base metal oxidation.

Description

Die Erfindung betrifft ein Verfahren zur Gewinnung von Edelmetallen, insbesondere von Gold.The invention relates to a process for the extraction of precious metals, in particular Gold.

Gold kommt in der Natur hauptsächlich gediegen, bspw. in der Form von Goldkörnchen, den sogenannten Nuggets, vor. Diese Goldkörnchen werden schon seit Jahrhunderten durch Waschen des goldhaltigen Materials gesammelt. Hierfür wird das goldhaltige Ma­ terial, sofern erforderlich, zerkleinert und anschließend im Wasser aufgeschlämmt. Aus der Suspension setzen sich die spezifisch schwereren Goldkörnchen und Goldflitter schneller ab als die leichteren Begleitstoffe. Die schon vor vielen Jahrhunderten entwickel­ te Herstellung von Amalgamen ermöglicht auch die unsichtbar kleinen Goldkörnchen im Quecksilber aufzulösen und nachher abzuscheiden. Das anschließende Abtrennen vom unerwünschten Quecksilber erfolgt bspw. auf chemischem Wege.Gold comes mainly naturally in nature, for example in the form of gold granules, the so-called nuggets. These gold granules have been around for centuries collected by washing the gold-containing material. For this, the gold-containing Ma material, if necessary, crushed and then slurried in water. Out The suspension contains the specifically heavier gold granules and gold spangles faster than the lighter accompanying substances. Which developed many centuries ago The production of amalgams also enables the invisible small gold granules dissolve in the mercury and then separate out. The subsequent separation from unwanted mercury occurs, for example, chemically.

Nachteilig bei dieser Methode ist, daß derart goldhaltige Materialien, daß sich der hohe Aufwand lohnt, nicht sehr häufig vorkommen und die Ausbeute relativ gering ist. Auch mit Hilfe von anderen bekannten Verfahren ist die Goldgewinnung erst ab ca. 7 g Gold je Tonne Ausgangsmaterial lukrativ. The disadvantage of this method is that such gold-containing materials that the high It is worth the effort, does not occur very often and the yield is relatively low. Also With the help of other known methods, gold extraction is only possible from approx. 7 g gold Ton of source material lucrative.  

Aufgabe der vorliegenden Erfindung ist es, die Edelmetallgewinnung, insbesondere die Ausbeute an Gold und anderen Edelmetallen zu verbessern.The object of the present invention is to obtain precious metals, in particular To improve yield of gold and other precious metals.

Diese Aufgabe wird mit dem in Anspruch 1 beschriebenen Verfahren gelöst. Mit Hilfe des erfindungsgemäßen Verfahrens können ferner schwermetallhaltige Schlacken von Industriebetrieben entsorgt werden, wobei im Rahmen der Entsorgung, gewissermaßen als Nebenprodukt, Edelmetalle gewonnen werden und diese die Entsorgung rentabel ma­ chen. Die Schwermetalle werden oxidiert und können von der chemischen Industrie wie­ derverwendet oder umweltfreundlich entsorgt, bspw. in Silizium eingeschrnolzen werden. Besonders hohe Edelmetallausbeuten werden bei der Verwendung von Schmelzofenbruch (Schmelzofenrückstände) als Ausgangsmaterial erzielt.This object is achieved with the method described in claim 1. With help of the process according to the invention can also contain heavy metal-containing slags of Industrial companies are disposed of, as part of the disposal process, so to speak as a by-product, precious metals are obtained and these make disposal profitable chen. The heavy metals are oxidized and can be used by the chemical industry like which is used or disposed of in an environmentally friendly manner, e.g. melted into silicon. Particularly high yields of precious metals are obtained when using furnace breakage (Furnace residues) as a starting material.

Weitere vorteilhafte Rahmenbedingungen zur Durchführung des Verfahrens sind in den Unteransprüchen beschrieben.Further advantageous framework conditions for carrying out the method are in the Subclaims described.

Im folgenden wird das Verfahren anhand der einzelnen Sclrritte näher beschrieben:
Im ersten Arbeitsgang 1 werden edelmetallhaltige, insbesondere goldhaltige Materialien wie bspw. Schlacken, Teile aus Schmelz- oder Hochöfen, wie bspw. Rückstände daraus oder gebrauchte Tiegel, oder auch vulkanische Massen und sulfidische Erze zu Staub zerkleinert. Durch diesen Zerkleinerungsvorgang werden die in den Ausgangsmaterialien vorkommenden Metalle von den Mineralien getrennt.The procedure is described in more detail below using the individual steps:
In the first step 1, precious metal-containing, in particular gold-containing materials such as slags, parts from melting or blast furnaces, such as residues from them or used crucibles, or also volcanic masses and sulfidic ores are ground to dust. This crushing process separates the metals found in the raw materials from the minerals.

Im zweiten Arbeitsgang 2 wird der durch den Zerkleinerungsvorgang entstandene Staub mit Hilfe von Wasser auf herkömmliche Weise ausgeschwemmt (flotiert). Durch die Flotation erfolgt eine erste Trennung eines Großteils der Mineralien von den Metallen.In the second step 2, the dust created by the crushing process washed out (floated) with the help of water in a conventional manner. Through the Flotation is the first separation of a large part of the minerals from the metals.

Im dritten Arbeitsgang 3 erfolgt ein Anreicherungsprozeß bei erhöhter Temperatur, wäh­ rend dem sich die edlen Metalle zu Ansammlungen anhäufen. In the third step 3, an enrichment process takes place at an elevated temperature where the noble metals accumulate to accumulate.  

Im vierten Arbeitsgang 4 erfolgt die Oxidation der unedlen Metalle bei nochmals erhöhter Temperatur unter Sauerstoffzufuhr (Sauerstoffbrenner). Während dieser Behandlung bil­ den die Edelmetalle Kugelaggregate. Hierbei entsteht ein Kern, vzw. aus Eisen, und eine Schale aus den in dem Ausgangsmaterial enthaltenen Edelmetallen. Je kleiner die Kugel­ aggregate sind, um so größer ist der Edelmetallanteil.In the fourth working step 4, the base metals are oxidized with a further increase Temperature under oxygen supply (oxygen burner). During this treatment bil the precious metals ball aggregates. This creates a core, vzw. made of iron, and one Shell made of the precious metals contained in the raw material. The smaller the ball aggregates, the greater the proportion of precious metals.

Die Arbeitsschritte 1 bis 4 lassen sich beliebig oft wiederholen, wodurch die Anreiche­ rung an Edelmetallen in der im Prozeß verbleibenden Masse bei jedem Durchlauf erhöht wird. Die abschließende Abtrennung der Edelmetalle, insbesondere die Aussonderung von Gold, erfolgt auf herkömmliche Weise.Steps 1 to 4 can be repeated as often as required, which increases the amount tion of precious metals in the mass remaining in the process increased with each pass becomes. The final separation of the precious metals, especially the separation of gold, is done in a conventional manner.

Claims (5)

1. Verfahren zur Gewinnung von Edelmetallen unter mehrfacher Wiederholung der fol­ genden vier Arbeitsschritte:
  • a) Zerkleinern des Materials,
  • b) Flotieren,
  • c) Anreichern bei erhöhter Temperatur und
  • d) Oxidieren der unedlen Metalle bei einer gegenüber Verfahrensschritt c) erhöhten Temperatur,
    wobei als Ausgangsmaterialien Schlacken, insbesondere Industrieschlacken, Teile sowie Rückstände aus Schrnelz- und/oder Hochöfen, vulkanische Massen und/oder sulfidische Erze verwendet werden.
1. Process for the extraction of precious metals by repeating the following four steps several times:
  • a) crushing the material,
  • b) float,
  • c) enrichment at elevated temperature and
  • d) oxidizing the base metals at a temperature which is higher than in process step c),
    slags, in particular industrial slags, parts and residues from shrinking furnaces and / or blast furnaces, volcanic masses and / or sulfidic ores are used as starting materials.
2. Verfahren zur Gewinnung von Edelmetallen nach Anspruch 1, dadurch gekennzeich­ net, daß als Ausgangsmaterial für die Edelmetallgewinnung Schmelzofenbruch ver­ wendet wird.2. A method for the extraction of precious metals according to claim 1, characterized net that ver as a starting material for the precious metal production furnace break is applied. 3. Verfahren zur Gewinnung von Edelmetallen nach Anspruch 1 oder 2, dadurch ge­ kennzeichnet, daß der Vorgang der Anreicherung bei Temperaturen zwischen 1000°C und 1200°C durchgeführt wird.3. A method for the extraction of precious metals according to claim 1 or 2, characterized ge indicates that the process of enrichment at temperatures between 1000 ° C and 1200 ° C is carried out. 4. Verfahren zur Gewinnung von Edelmetallen nach Anspruch 1, 2 oder 3, dadurch ge­ kennzeichnet, daß der Vorgang der Oxidation bei Temperaturen zwischen 1400°C und 1600°C durchgeführt wird.4. A method for the extraction of precious metals according to claim 1, 2 or 3, characterized ge indicates that the process of oxidation at temperatures between 1400 ° C and 1600 ° C is carried out. 5. Verfahren zur Gewinnung von Edelmetallen nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß der Vorgang der Oxidation unter Sauerstoffzu­ fuhr durchgeführt wird.5. Process for the extraction of precious metals according to one of the preceding An sayings, characterized in that the process of oxidation under oxygen drove is carried out.
DE1998105893 1998-02-13 1998-02-13 Precious metal especially gold recovery from slags and melting furnace residues Withdrawn DE19805893A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998105893 DE19805893A1 (en) 1998-02-13 1998-02-13 Precious metal especially gold recovery from slags and melting furnace residues

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998105893 DE19805893A1 (en) 1998-02-13 1998-02-13 Precious metal especially gold recovery from slags and melting furnace residues

Publications (1)

Publication Number Publication Date
DE19805893A1 true DE19805893A1 (en) 1999-08-19

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ID=7857596

Family Applications (1)

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Country Status (1)

Country Link
DE (1) DE19805893A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029275A1 (en) * 1999-10-21 2001-04-26 The University Of Akron Recovery of precious metals from coal burning slag by multiple crushing/suspension stages
WO2011130790A1 (en) * 2010-04-23 2011-10-27 Precious Metals Recovery Pty Ltd Smelting method using a fluxing agent
CN104195347A (en) * 2014-09-17 2014-12-10 招远市招金贵合科技有限公司 Process for enriching gold and silver from pyrite cinder and method for extracting gold and silver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029275A1 (en) * 1999-10-21 2001-04-26 The University Of Akron Recovery of precious metals from coal burning slag by multiple crushing/suspension stages
WO2011130790A1 (en) * 2010-04-23 2011-10-27 Precious Metals Recovery Pty Ltd Smelting method using a fluxing agent
CN104195347A (en) * 2014-09-17 2014-12-10 招远市招金贵合科技有限公司 Process for enriching gold and silver from pyrite cinder and method for extracting gold and silver

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