GB499350A - Improvement in iron desulphurization - Google Patents
Improvement in iron desulphurizationInfo
- Publication number
- GB499350A GB499350A GB9634/38A GB963438A GB499350A GB 499350 A GB499350 A GB 499350A GB 9634/38 A GB9634/38 A GB 9634/38A GB 963438 A GB963438 A GB 963438A GB 499350 A GB499350 A GB 499350A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slag
- per cent
- lime
- blast furnace
- pig iron
- 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
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
- C21C1/02—Dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Pig iron is desulphurized by treatment in a molten condition outside the blast furnace in the presence of a reducing agent and under reducing conditions with a slag comprising a mixture of blast furnace slag and lime, the upper limit of the latter being 55 per cent and the desulphurization is carried on until the percentage of sulphur in the slag is more than one hundred times that of the sulphur in the pig iron. The slag may also contain an alkaline earth oxide other than lime, an alkaline oxide and more than 10 per cent and up to 50 per cent of fluorspar. In an example, a slag contains 70 per cent of blast furnace slag, 20 of lime and 10 of fluorspar. The desulphurizing is carried out with the positive exclusion of air and also may be carried out according to the process described in Specification 499,302. The pig iron treated is produced in a coke blast furnace under such conditions that a slag containing less than 40 per cent of lime and a pig iron having a sulphur content greater than 0,1 per cent are produced. The slag may be revivified as described in Specification 477,083.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US499350XA | 1937-02-01 | 1937-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB499350A true GB499350A (en) | 1939-01-17 |
Family
ID=21962536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9634/38A Expired GB499350A (en) | 1937-02-01 | 1937-04-17 | Improvement in iron desulphurization |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB499350A (en) |
-
1937
- 1937-04-17 GB GB9634/38A patent/GB499350A/en not_active Expired
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