GB488568A - Improvements in processes for roasting nickel matter - Google Patents
Improvements in processes for roasting nickel matterInfo
- Publication number
- GB488568A GB488568A GB65737A GB65737A GB488568A GB 488568 A GB488568 A GB 488568A GB 65737 A GB65737 A GB 65737A GB 65737 A GB65737 A GB 65737A GB 488568 A GB488568 A GB 488568A
- Authority
- GB
- United Kingdom
- Prior art keywords
- kiln
- matte
- effected
- roasted
- oxygen
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/025—Obtaining nickel or cobalt by dry processes with formation of a matte or by matte refining or converting into nickel or cobalt, e.g. by the Oxford process
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
In roasting nickel matte in a rotary kiln, the unroasted matte is mixed with roasted matte to lower the sulphur content, say to about 8 per cent, so as to reduce the risk of partial melting. Roasting is effected at a temperature of about 1000 DEG C. in the presence of a substantial excess of oxygen. The roasted matte may be heated to 1100-1300 DEG C. to remove residual sulphur, the heating being effected in the presence of only a small excess of oxygen. The two stages may be effected in a single rotary kiln, the material to be roasted and the combustion gases being lead through the kiln in countercurrent. The gases entering the kiln contain only a small excess of air, air being admitted at one or more points through the kiln shell. The content of free oxygen in the gases leaving the kiln is between 10 and 15 per cent. A statement of the art relates to a process wherein fine-grained nickel matte is heated in a furnace, cooled, the lumps reduced to a powder, and the material reintroduced into the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB65737A GB488568A (en) | 1937-01-08 | 1937-01-08 | Improvements in processes for roasting nickel matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB65737A GB488568A (en) | 1937-01-08 | 1937-01-08 | Improvements in processes for roasting nickel matter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB488568A true GB488568A (en) | 1938-07-08 |
Family
ID=9708208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB65737A Expired GB488568A (en) | 1937-01-08 | 1937-01-08 | Improvements in processes for roasting nickel matter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB488568A (en) |
-
1937
- 1937-01-08 GB GB65737A patent/GB488568A/en not_active Expired
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