US1345051A - Manufacture of iron and steel - Google Patents

Manufacture of iron and steel Download PDF

Info

Publication number
US1345051A
US1345051A US182577A US18257717A US1345051A US 1345051 A US1345051 A US 1345051A US 182577 A US182577 A US 182577A US 18257717 A US18257717 A US 18257717A US 1345051 A US1345051 A US 1345051A
Authority
US
United States
Prior art keywords
iron
silicon
carbon
steel
manufacture
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
US182577A
Inventor
Whyte Samuel
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 US182577A priority Critical patent/US1345051A/en
Application granted granted Critical
Publication of US1345051A publication Critical patent/US1345051A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur

Definitions

  • This invention relates to a new or "improved method of eliminating silica to produce an iron low in silicon.
  • the present invention does not deal with the purification of iron or steel from sulfur, phosphorus or the like, but only with the elimination of silicon and the production of homogeneous white cast irons.
  • the present invention provides this missing step and enables such ores to be used for the direct production of silicon-free cast iron. Further, the processfor eliminating silicon at low temperatures provides a ready means for obtaining cast iron of any desired definite composition. from low grade irons.
  • the invention consists in eliminating silicon as required from a cast iron contain ing various proportions thereof by heating to a suitable temperature with borax or materials' producing borax, together with free carbon, preferably in the form of graphite.
  • a suitable temperature with borax or materials' producing borax, together with free carbon, preferably in the form of graphite.
  • the crucible is of graphite, or
  • carbon preferably in the form of graphite
  • the iron carbon eutectic was found to have a constant carbon content of about 2.7 per cent.
  • This white cast iron may be advantageously used as a convenient means of adding carbon in the manufacture of steel.
  • An improved cast iron with a silicon content according to requirements can also be obtained by partial elimination of silicon in the way just described from a high silicon V I claim as new and desire to secure by Let' ters Patent is 1.
  • a process for the elimination of silicon as required from east irons by heating the iron to a suitable temperature with borax or materials producing borax together with carbon, preferably in the form of graphite,
  • white cast iron which consists in melting cast iron and treating the same with borax and carbon.
  • White cast iron of eutectic composition containing substantially 2.7% of carbon and substantially free from silicon.

Landscapes

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

Description

UNITED STATES PATENT OFFICE.
SAMUEL INHYTE, 0F REDHILL, ENGLAND.
MANUFACTURE or IRON AND STEEL.
Specificationof Letters Patent. Patented J 1111 29, 1920,
No Drawing. Aplplioation filed July 24, 1917, Serial No. 182,577. Renewed May 1, 1920.- Serial No. 378,260. I
To all whom it may concern:
Be it known that I SAMUEL WHYTE, B. Sc., a subject of the King of Great Britain and Ireland, and residing at 41 Woodlands road, Redhill, in the county of Surrey, England, have invented certain new and useful Improvements Relating to the Manufacture of Iron and Steel, of which the following is a specification.
This invention relates to a new or "improved method of eliminating silica to produce an iron low in silicon.
The present invention does not deal with the purification of iron or steel from sulfur, phosphorus or the like, but only with the elimination of silicon and the production of homogeneous white cast irons.
At present many'ores exist from which excellent cast iron could be obtained but that the content of silicon would be too high for any but special uses, and as no industrial method exists whereby the silicon can be eliminated readily at a low temperature they are not directly available.
The present invention provides this missing step and enables such ores to be used for the direct production of silicon-free cast iron. Further, the processfor eliminating silicon at low temperatures provides a ready means for obtaining cast iron of any desired definite composition. from low grade irons.
The invention consists in eliminating silicon as required from a cast iron contain ing various proportions thereof by heating to a suitable temperature with borax or materials' producing borax, together with free carbon, preferably in the form of graphite. In carrying this invention into effect as applied to the production of a white iron' low in silicon, I take a quantity of gray cast ironand melt it under borax or, after melting, tap it out into a crucible, preferably one in which theheat can be maintained, a layer of borax being melted on the surface of the metal. The crucible is of graphite, or
carbon, preferably in the form of graphite,
is added to the borax or to the bath. I prefer to' force a current of air through the iron, for instance by means of a suitable re? fractory tube. I By this treatment the silicon is more or treatment the metal is cast in the usual Way.
depending on the time of treatment. After WVhen carried to its extreme and the silicon had been eliminated in one test, the iron carbon eutectic was found to have a constant carbon content of about 2.7 per cent.
This white cast iron may be advantageously used as a convenient means of adding carbon in the manufacture of steel.
An improved cast iron with a silicon content according to requirements can also be obtained by partial elimination of silicon in the way just described from a high silicon V I claim as new and desire to secure by Let' ters Patent is 1. A process for the elimination of silicon as required from east irons by heating the iron to a suitable temperature with borax or materials producing borax together with carbon, preferably in the form of graphite,
with or without the introduction of air, substantially' as described.
2. The process of eliminating silicon from cast iron which consists in heating the iron and treating the heatedmetal with alkaline borate in the presence of carbon.
3. The process of eliminating silicon from cast iron which consists in melting the iron,
treating the molten metal with alkaline borate in the presence of carbon and subjecting the molten mass to a current of air.
4. The process .ofeliminatin silicon from cast iron which consists in me ting the iron and adding thereto borax and carbon.
,5. The process of producing. white cast iron which consists in melting cast iron and treating the same with borax and carbon.
6. White cast iron of eutectic composition, containing substantially 2.7% of carbon and substantially free from silicon.
In testimony whereof I have signed my name to this specification I SAMUEL WHYTE.
US182577A 1917-07-24 1917-07-24 Manufacture of iron and steel Expired - Lifetime US1345051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US182577A US1345051A (en) 1917-07-24 1917-07-24 Manufacture of iron and steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US182577A US1345051A (en) 1917-07-24 1917-07-24 Manufacture of iron and steel

Publications (1)

Publication Number Publication Date
US1345051A true US1345051A (en) 1920-06-29

Family

ID=22669065

Family Applications (1)

Application Number Title Priority Date Filing Date
US182577A Expired - Lifetime US1345051A (en) 1917-07-24 1917-07-24 Manufacture of iron and steel

Country Status (1)

Country Link
US (1) US1345051A (en)

Similar Documents

Publication Publication Date Title
US1345051A (en) Manufacture of iron and steel
US1376113A (en) Method of producing ferro-silico-magnesium alloy
US228615A (en) Charles j
US745829A (en) Magnetic composition and method of making same.
US719117A (en) Process of converting cast-iron into steel or malleable iron and the product so obtained.
US898116A (en) Process of refining metals.
US2488513A (en) Production of white cast iron
US1544037A (en) Nickel-chromium alloy and process of making same
US203957A (en) Improvement in melting and treating iron and steel rails and scrap
US490961A (en) Process of producing metallic alloys
US1492567A (en) Process of making high-speed steel tools
US1555314A (en) Process for improving the quality of metals or melting under reduced pressure
US2646375A (en) Process for hardening alloy gray cast iron
GB190725408A (en) Improvements in or relating to the Manufacture of Aluminium or Aluminium Alloys, and Silicides.
US1726433A (en) Process for the manufacture of strong machinable cast iron
US1502642A (en) Method of making manganese steel
US1265150A (en) Process of producing phosphor-copper compounds.
US1389133A (en) Heat-resisting alloy
US452733A (en) Process of manufacturing mineral wool
US284553A (en) James hendeesoin
US168263A (en) Improvement in the manufacture of iron
US506799A (en) Nella
US767110A (en) Method of making magnetic materials.
US1705995A (en) Process for the manufacture of alpha highly-valuable cast iron
JPS6164809A (en) Treatment of cast iron melt by silicon carbide