DE870682C - Recovery of iron from Thomas slag using a magnetic separator - Google Patents

Recovery of iron from Thomas slag using a magnetic separator

Info

Publication number
DE870682C
DE870682C DEW1391D DEW0001391D DE870682C DE 870682 C DE870682 C DE 870682C DE W1391 D DEW1391 D DE W1391D DE W0001391 D DEW0001391 D DE W0001391D DE 870682 C DE870682 C DE 870682C
Authority
DE
Germany
Prior art keywords
slag
iron
recovery
magnetic separator
thomas slag
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
Application number
DEW1391D
Other languages
German (de)
Inventor
Karl Dr-Ing Bechtold
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.)
Westfalia Dinnendahl Groeppel AG
Original Assignee
Westfalia Dinnendahl Groeppel AG
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 Westfalia Dinnendahl Groeppel AG filed Critical Westfalia Dinnendahl Groeppel AG
Priority to DEW1391D priority Critical patent/DE870682C/en
Application granted granted Critical
Publication of DE870682C publication Critical patent/DE870682C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/005—Pretreatment specially adapted for magnetic separation
    • B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)

Description

Zurückgewinnung von Eisen aus Thomasschlacke mittels Magnetscheider Das Patent` f;43 981 betrifft ein Verfahren, zur Zurückewinnung von Eisen aus Thomasschlacke mittels' Magnetscheider unter Anwendung einer Reaktion zur Überführung der in der Schlacke enthaltenen unmagnetischen Eisenverbindungen in Eisen und magnetische Eisenverbindungen und kennzeichnet sich dadurch, daß zur Umwandlung der unmagnetischen Eisenverbindungen der Schlacke während des abschlackens feste Reduktionsmittel (insbesondere Kohle, Koks oder Waschberge) zugegeben werden, worauf die Schlacke gemahlen und der Magnetaufbereitung unterworfen wird. Es hat sich gezeigt, daß man auf diese Weise mit einem wirtschaftlich tragbaren Verbrauch an Reduktionsmitteln die Eisenoxyde aus ihren schwer reduzierbaren Verbindungen, z. B. Calciumferrite, herauslösen kann.Recovery of iron from Thomas slag by means of a magnetic separator Patent 'f; 43 981 relates to a process for the recovery of iron from Thomas slag by means of a magnetic separator using a reaction to convert the non-magnetic iron compounds contained in the slag into iron and magnetic iron compounds and is characterized by that solid reducing agents (especially coal, coke or washing mountains) are added to convert the non-magnetic iron compounds of the slag during slagging, whereupon the slag is ground and subjected to magnet processing. It has been shown that in this way with an economically acceptable consumption of reducing agents, the iron oxides from their difficult to reducible compounds, eg. B. calcium ferrites, can dissolve.

Erfindungsgemäß wird eine weitere Verbesserung dadurch erzielt, daß der flüssigen Schlacke außer den erwähnten Reduktionsmitteln Sand oder andere kieselsäurereichen Stoffe, beispielsweise Schweißschlacke, Glas, mit Sand umgeschmolzene Sodaschlacke, Phonolith usw., zugesetzt werden. Durch diesen Zusatz wird nämlich das Herauslösen der Eisenoxyde aus ihren schwer reduzierbaren Verbindungen gefördert und gleichzeitig in an sich bekannter Weise die Zitronensäurelöslichkeit der Schlacke erhöht. Aus dem letztgenannten Grunde ist es an sich bekannt, der Thomasschlacke 'Sand od. dgl. beizumischen. Der Zusatz von Sand od. dgl. hat den weiteren Vorteil, daß die an sich sehr heftige Reaktion zwischen der Schlacke und den Reduktionsmitteln stark gedämpft wird.According to the invention, a further improvement is achieved in that of the liquid slag, besides the reducing agents mentioned, sand or other silicic acid-rich Substances, e.g. welding slag, glass, soda slag remelted with sand, Phonolite, etc. may be added. Because of this addition, the removal the Iron oxides promoted from their difficult to reducible compounds and at the same time, in a manner known per se, the citric acid solubility of the slag elevated. For the latter reason it is known per se, the Thomas slag Mix in sand or the like. The addition of sand or the like has the further advantage that the reaction, which is very violent in itself, between the slag and the reducing agents is strongly attenuated.

Der Zusatz von Sand od. dgl. wird zweckmäßig so bemessen, daß der Gehalt der Schlacke an Kieselsäure 8 bis 12 °/o beträgt.The addition of sand or the like. Is expediently dimensioned so that the The silica content of the slag is 8 to 12%.

Claims (1)

PATENTANSPRUCH: Verfahren zur Zurückgewinnung von Eisen aus Thomasschlacke mittels Magnetscheider nach Patent 843 981, dadurch gekennzeichnet, daß der flüssigen Schlacke außer. den Reduktionsmitteln noch Sand oder sonstige kieselsäurereichen Stoffe zugesetzt werden.PATENT CLAIM: Process for the recovery of iron from Thomas slag by means of a magnetic separator according to patent 843 981, characterized in that the liquid Slag except. the reducing agents nor sand or other silica-rich Substances are added.
DEW1391D 1941-11-13 1941-11-13 Recovery of iron from Thomas slag using a magnetic separator Expired DE870682C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW1391D DE870682C (en) 1941-11-13 1941-11-13 Recovery of iron from Thomas slag using a magnetic separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW1391D DE870682C (en) 1941-11-13 1941-11-13 Recovery of iron from Thomas slag using a magnetic separator

Publications (1)

Publication Number Publication Date
DE870682C true DE870682C (en) 1953-03-16

Family

ID=7591215

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW1391D Expired DE870682C (en) 1941-11-13 1941-11-13 Recovery of iron from Thomas slag using a magnetic separator

Country Status (1)

Country Link
DE (1) DE870682C (en)

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