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GB2003500A - Particulate ferrochromium for gravity separation of diamonds - Google Patents

Particulate ferrochromium for gravity separation of diamonds

Info

Publication number
GB2003500A
GB2003500A GB7832711A GB7832711A GB2003500A GB 2003500 A GB2003500 A GB 2003500A GB 7832711 A GB7832711 A GB 7832711A GB 7832711 A GB7832711 A GB 7832711A GB 2003500 A GB2003500 A GB 2003500A
Authority
GB
United Kingdom
Prior art keywords
ferrochromium
diamonds
particulate
gravity separation
percent
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.)
Granted
Application number
GB7832711A
Other versions
GB2003500B (en
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.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
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 De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of GB2003500A publication Critical patent/GB2003500A/en
Application granted granted Critical
Publication of GB2003500B publication Critical patent/GB2003500B/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel
    • C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

A ferrochrome alloy, includes, as essential constituents, 18 to 30 percent by weight chromium, 0,6 to 3 percent by weight carbon and 0,5 to 10 percent by weight silicon, the balance being iron. The invention also provides a method of improving the magnetic properties of such an alloy by heat treating the alloy at a temperature of 550 to 1000 DEG C for a time sufficient to produce the desired result.
GB7832711A 1977-08-18 1978-08-09 Alloys Expired GB2003500B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA00775004A ZA775004B (en) 1977-08-18 1977-08-18 Improvements in alloys

Publications (2)

Publication Number Publication Date
GB2003500A true GB2003500A (en) 1979-03-14
GB2003500B GB2003500B (en) 1982-04-15

Family

ID=25571932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832711A Expired GB2003500B (en) 1977-08-18 1978-08-09 Alloys

Country Status (4)

Country Link
AU (1) AU517258B2 (en)
BR (1) BR7805314A (en)
GB (1) GB2003500B (en)
ZA (1) ZA775004B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520751A (en) * 1993-09-24 1996-05-28 Exxon Research And Engineering Company Oxidation of low chromium steels

Also Published As

Publication number Publication date
BR7805314A (en) 1979-05-08
AU517258B2 (en) 1981-07-16
AU3898078A (en) 1980-02-21
ZA775004B (en) 1978-10-25
GB2003500B (en) 1982-04-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920809