GB911992A - Improvements in the reduction smelting of chromite-bearing materials - Google Patents
Improvements in the reduction smelting of chromite-bearing materialsInfo
- Publication number
- GB911992A GB911992A GB1463559A GB1463559A GB911992A GB 911992 A GB911992 A GB 911992A GB 1463559 A GB1463559 A GB 1463559A GB 1463559 A GB1463559 A GB 1463559A GB 911992 A GB911992 A GB 911992A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferrochromium
- reducing agent
- produce
- stage
- smelted
- 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
- 238000003723 Smelting Methods 0.000 title abstract 2
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 239000003638 chemical reducing agent Substances 0.000 abstract 4
- 229910001339 C alloy Inorganic materials 0.000 abstract 3
- 239000002893 slag Substances 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract 2
- 239000000292 calcium oxide Substances 0.000 abstract 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 239000011651 chromium Substances 0.000 abstract 2
- 239000000395 magnesium oxide Substances 0.000 abstract 2
- 229910052710 silicon Inorganic materials 0.000 abstract 2
- 239000010703 silicon Substances 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 1
- 229910001021 Ferroalloy Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000571 coke Substances 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
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)
- Manufacture And Refinement Of Metals (AREA)
Abstract
In the smelting of chromite-bearing ores and concentrates in an arc furnace the charge contains alumina, silica and magnesia (with or without calcium oxide) in such proportions that the resultant slug contains these constituents in the ratio 0.25-1.25 : 1 : 0.5-1.5 by weight, any calcium oxide being calculated as magnesia. The process may be operated to produce ferrochromium in a single stage, or a first stage may consist of partial reduction using either carbonaceous or non-carbonaceous reducing agent to produce iron or steel or a low-chromium ferroalloy together with a slag enriched in chromium. The reducing agent may be ferrochromium or ferro-chromium-silicon made by complete reduction of the ore. The slag is then smelted to produce a high-grade ferrochromium. A medium-carbon alloy may be obtained by using coke as reducing agent in a furnace having a non-carbonaceous lining. To obtain a low-carbon alloy, a high-carbon alloy produced in two stages as described above is smelted with silica and a reducing agent to produce a ferrochromium alloy containing about 50% of silicon, which is then smelted with more of the enriched slag from the first stage. As a modification the ferrochromium-silicon may be obtained directly in the second stage. Preferably in all cases the ore should initially be stabilized to constant composition by heating at 900-1350 DEG C. Specification 646,162 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1463559A GB911992A (en) | 1959-04-29 | 1959-04-29 | Improvements in the reduction smelting of chromite-bearing materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1463559A GB911992A (en) | 1959-04-29 | 1959-04-29 | Improvements in the reduction smelting of chromite-bearing materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB911992A true GB911992A (en) | 1962-12-05 |
Family
ID=10044806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1463559A Expired GB911992A (en) | 1959-04-29 | 1959-04-29 | Improvements in the reduction smelting of chromite-bearing materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB911992A (en) |
-
1959
- 1959-04-29 GB GB1463559A patent/GB911992A/en not_active Expired
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