DE867697C - Process for the recovery of low-percentage chrome ores - Google Patents

Process for the recovery of low-percentage chrome ores

Info

Publication number
DE867697C
DE867697C DED1816D DED0001816D DE867697C DE 867697 C DE867697 C DE 867697C DE D1816 D DED1816 D DE D1816D DE D0001816 D DED0001816 D DE D0001816D DE 867697 C DE867697 C DE 867697C
Authority
DE
Germany
Prior art keywords
percentage
chrome
low
ores
recovery
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
DED1816D
Other languages
German (de)
Inventor
Fritz Dipl-Ing Dr Phil Harders
Werner Dipl-Ing Lange
Alfred Dipl-Ing Schmidt
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.)
Dortmund Hoerder Huettenunion AG
Original Assignee
Dortmund Hoerder Huettenunion 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 Dortmund Hoerder Huettenunion AG filed Critical Dortmund Hoerder Huettenunion AG
Priority to DED1816D priority Critical patent/DE867697C/en
Application granted granted Critical
Publication of DE867697C publication Critical patent/DE867697C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Verfahren zur Verwertung niedrigprozentiger Chromerze Die immer angespannter werdende Lage auf dem Gebiete des chromhaltigen Schrottes und des hochprozentigen Ferrochroms erfordert gebieterisch die Nutzbarmachung niedrigprozentiger Cr-Erze, deren Umwandlung in Fe-Cr sonst nur durch Aufwendung großer Energien möglich ist oder die so wenig Chrom enthalten, daß sie bislang nicht aufbereitet wurden. Solche Erze finden sich beispielsweise in Griechenland oder auch da, wo hochchromhaltige Erze gewonnen werden, und zwar als unerwünschte Begleiter. Erfindungsgemäß gelingt es, niedrigprozentige Chromerze dadurch zu verwerten, daß sie als Rohstoff zur Herstellung von Stahlroheisen im Hochofen verwendet werden, worauf dieses so gewonnerte Stahlroheisen als voller oder teilweiser Ersatz von Chromstahlschrott im Siemens-Martinofen oder im Elektroofen eingesetzt wird, und zwar als Chrom-und Kohlenstoffträger für die Herstellung von Chromstählen. In manchen Fällen ist es sogar möglich, das sonst noch beim Fertigmachen des Stahls benötigte Fe-Cr ganz oder zum größten Teil zu ersetzen, z..B. bei der Herstellung von il/oigen Cr-Stählen im Herdofen. Ein weiterer Vorteil ergibt sich durch die Verkürzung der_Einschmelzzeiten gegenüber denen bei der Verwendung chromhaltigen Schrottes. Außer der größeren Schmelzleistung wird auch noch die Haltbarkeit der Ofenauskleidung erhöht.Process for the recovery of low-percentage chrome ores The more and more tense growing situation in the area of chromium-containing scrap and high-percentage Ferrochromes imperatively requires the utilization of low-percentage Cr ores, whose conversion into Fe-Cr is otherwise only possible by using large amounts of energy or that contain so little chromium that they have not yet been processed. Such Ores can be found, for example, in Greece or wherever they have a high chromium content Ores are extracted, namely as undesirable companions. Succeeds according to the invention it is to utilize low-percentage chrome ores by using them as raw materials for production of steel pig iron are used in the blast furnace, whereupon this so won steel pig iron as a full or partial replacement of chromium steel scrap in the Siemens Martin furnace or is used in the electric furnace, namely as a chromium and carbon carrier for the Manufacture of chrome steels. In some cases it is even possible, otherwise Fe-Cr still required all or most of the steel when it was being made ready to replace, e.g. in the production of aluminum Cr steels in a hearth furnace. Another The advantage results from the shortening of the melting times compared to those for the use of scrap containing chromium. Besides the greater melting capacity will the durability of the furnace lining is also increased.

Am Wesen der Erfindung wird nichts geändert, wenn das Cr-Stahleisen auch noch mit anderen Legierungseletnenten, wie z. B. Ni, Mo, Co. od. dgl., im Hochofen erschmölzen wird.Nothing is changed in the essence of the invention if the Cr steel iron also with other alloy elements, such as B. Ni, Mo, Co. or the like. In the blast furnace will melt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verwertung niedrigprozentiger Chromerze, dadu rch gekennzeichnet, daß die Erze im Hochofen zu chromhaltigem Stahleisen umgeschmolzen werden, worauf dieses Chromstahleisen als Chrom- 'und Kohlenstoffträger im Herdofen zur Herstellung von Chromstahl eingesetzt wird. Angezogene Druckschriften: Österreichische Patentschrift Nr. 139 089. PATENT CLAIM: Process for the utilization of low-percentage chrome ores, characterized by the fact that the ores are remelted in the blast furnace to form chromium-containing steel iron, whereupon this chrome steel iron is used as a chrome and carbon carrier in the hearth furnace for the production of chrome steel. Cited publications: Austrian patent specification No. 139 089.
DED1816D 1943-11-13 1943-11-13 Process for the recovery of low-percentage chrome ores Expired DE867697C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED1816D DE867697C (en) 1943-11-13 1943-11-13 Process for the recovery of low-percentage chrome ores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED1816D DE867697C (en) 1943-11-13 1943-11-13 Process for the recovery of low-percentage chrome ores

Publications (1)

Publication Number Publication Date
DE867697C true DE867697C (en) 1953-02-19

Family

ID=7029534

Family Applications (1)

Application Number Title Priority Date Filing Date
DED1816D Expired DE867697C (en) 1943-11-13 1943-11-13 Process for the recovery of low-percentage chrome ores

Country Status (1)

Country Link
DE (1) DE867697C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT139089B (en) * 1931-01-02 1934-10-25 Ver Stahlwerke Ag Process for the production of chromium-alloyed steels of all kinds by means of the Thomas process.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT139089B (en) * 1931-01-02 1934-10-25 Ver Stahlwerke Ag Process for the production of chromium-alloyed steels of all kinds by means of the Thomas process.

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