GB595408A - Improvements in the manufacture of stainless steels and low carbon ferro-alloys - Google Patents
Improvements in the manufacture of stainless steels and low carbon ferro-alloysInfo
- Publication number
- GB595408A GB595408A GB1779544A GB1779544A GB595408A GB 595408 A GB595408 A GB 595408A GB 1779544 A GB1779544 A GB 1779544A GB 1779544 A GB1779544 A GB 1779544A GB 595408 A GB595408 A GB 595408A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slag
- agent
- ferro
- reducing
- bath
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052799 carbon Inorganic materials 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 229910001021 Ferroalloy Inorganic materials 0.000 title abstract 2
- 229910001220 stainless steel Inorganic materials 0.000 title abstract 2
- 239000003638 reducing agent Substances 0.000 abstract 8
- 239000002893 slag Substances 0.000 abstract 8
- 229910052751 metal Inorganic materials 0.000 abstract 7
- 239000002184 metal Substances 0.000 abstract 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 4
- 235000015450 Tilia cordata Nutrition 0.000 abstract 4
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 4
- 238000005275 alloying Methods 0.000 abstract 4
- 239000004571 lime Substances 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 150000002739 metals Chemical class 0.000 abstract 3
- 239000010703 silicon Substances 0.000 abstract 3
- 229910052710 silicon Inorganic materials 0.000 abstract 3
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910021346 calcium silicide Inorganic materials 0.000 abstract 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
In a method of manufacturing stainless steels and low carbon ferro alloys by direct ore reduction, a non-carbonaceous reducing-agent, a slag-making agent and the ore are preheated, preferably to such a temperature and for such a time as to substantially dehydrate them, introduced into a furnace on a bath consisting primarily of molten steel or iron and worked up to a thick viscous basic slag having a high content of oxide of the alloying metal or metals and adapted to retain the reducing agent in suspension. The slag is then further heated, a further quantity of reducing-agent and slag-making agent added, whereby the slag is worked down to a more fluid state, and the oxides are reduced to the alloying metal or metals. The reducing agent, which may comprise ferro-silicon, silicon, calcium silicide, ferro-chrome-silicon, ferro-manganese-silicon or aluminium is preferably used in amounts slightly in excess of the theoretical equivalent necessary. The raw materials should be crushed to three-quarter inch size or less to expedite the reaction. Charging of the furnace may be effected by successive alternate batches of oxides and reducers. Separate mixtures of ore and a part of the slagging-material and reducing-agent with a further part of the slagging-material may be preheated and charged alternately, and when the thick slag is formed on the bath, further preheated reducing-agent with lime or other slagging-material may be spread over the bath to maintain the basic nature thereof, e.g. to maintain the ratio of total bases to total acids on the slag substantially between 1.25 and 2 to 1. In the production of ferro-chrome alloys, hot dry chromite and lime mixture is charged into the furnace and fused. Hot ferro-silicon or silico-ferro-chrome, mixed with lime and heated, is added to build up a thick basic slag, having a high content of oxide of the alloying metal, which is superheated to about 1525 DEG C. to 1725 DEG C. and worked down to a more fluid slag by addition of further hot reducing-agent and lime. Hot or cold iron or steel of appropriate carbon content is added and the whole charge brought to the pouring temperature. The original bath may be prepared from substantially rust-free scrap iron or scrap alloys which may or may not contain a part of the required alloying metal or metals. In carrying out the process in a direct arc furnace, the electrodes should be raised clear of the slag bath to avoid carbon pick-up by the bath.
Publications (1)
Publication Number | Publication Date |
---|---|
GB595408A true GB595408A (en) | 1947-12-04 |
Family
ID=1733414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1779544A Expired GB595408A (en) | 1944-09-18 | Improvements in the manufacture of stainless steels and low carbon ferro-alloys |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB595408A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114561540A (en) * | 2022-04-14 | 2022-05-31 | 江苏大学 | Method for efficiently extracting, separating and recovering chromium from stainless steel slag |
-
1944
- 1944-09-18 GB GB1779544A patent/GB595408A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114561540A (en) * | 2022-04-14 | 2022-05-31 | 江苏大学 | Method for efficiently extracting, separating and recovering chromium from stainless steel slag |
CN114561540B (en) * | 2022-04-14 | 2024-06-07 | 江苏大学 | Method for efficiently extracting, separating and recycling chromium in stainless steel slag |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3809547A (en) | Electric furnace steelmaking process using oxide of boron additive | |
GB595408A (en) | Improvements in the manufacture of stainless steels and low carbon ferro-alloys | |
US2855289A (en) | Fluidizing slags of open hearth and electric furnace steel making processes using eutectic mixture | |
GB1446021A (en) | Method for the refining of molten metal | |
US3834899A (en) | Method of manufacturing low-carbon ferrochromium | |
US1428061A (en) | Manufacture of iron and steel | |
US2040167A (en) | Slag and agitation heat treatment of metals | |
US3393068A (en) | Manufacture of ferro alloys containing silicon | |
GB1086196A (en) | Reduction of iron ore | |
US1622977A (en) | Alloy | |
US1925916A (en) | Process of producing alloys | |
US687029A (en) | Method of manufacturing steel. | |
US2169741A (en) | Process for the manufacture of alloys and in particular of ferroalloys or of inoxidizable steels | |
US2786748A (en) | Method of melting iron and steel | |
US1939795A (en) | Method of making chromium steel | |
GB1290436A (en) | ||
US2747985A (en) | Methods of producing commercially pure iron | |
GB157944A (en) | Process for enriching iron alloys poor in silicon and manganese, in silicon and manganese | |
SU1313879A1 (en) | Method for melting steel | |
US1969886A (en) | Method of manufacturing ferro alloys | |
SU722955A1 (en) | Method of producing ore-lime melt for obtaining carbon-free ferrochrome | |
US1428057A (en) | Production of low-carbon ferro alloys | |
US703543A (en) | Manufacture of crucible-steel. | |
USRE13861E (en) | William b | |
JPS62167808A (en) | Production of molten chromium iron |