GB844506A - A continuous process for the roasting of arsenopyrites ores - Google Patents
A continuous process for the roasting of arsenopyrites oresInfo
- Publication number
- GB844506A GB844506A GB14062/58A GB1406258A GB844506A GB 844506 A GB844506 A GB 844506A GB 14062/58 A GB14062/58 A GB 14062/58A GB 1406258 A GB1406258 A GB 1406258A GB 844506 A GB844506 A GB 844506A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- roasting
- ore
- gases
- preheating
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/52—Preparation of sulfur dioxide by roasting sulfides
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The continuous process of roasting arsenopyrites ores of the parent Specification comprising preheating the ores in a preceding separate stage by direct heat-exchange with a portion of the SO2 gases from the subsequent roasting stage, passing the preheated ore to the roasting stage, and recovering the remainder of the SO2 gases from the roasting stage as arsenic-free gas is modified by introducing O2 into the roasting stage in amount sufficiently in excess of the p stoichiometric requirement for roasting to ensure that the temperature of the ore in the preheating stage is raised to at least 800 DEG C. by combustion therein of labile S with the excess O2 in the portion of SO2 gases from the roasting stage passing in direct heat-exchange with the ore in the preheating stage, and retaining the ore in the preheating stage for a period of time insufficient for the distillation and combustion of the whole of the labile S. Arsenopyrites ore of size 0.4-0.1 mm. may be preheated to 800-815 DEG C. and arsenic sulphide is separated from the resulting SO2 gases. After 10-20 minutes residence time in the preheating stage, where the ore is also heated by indirect heat-exchange with the remainder of the SO2 gases from the roasting stage, the ferrous sulphide with some labile S is roasted by a blast of hot air at under 1000 DEG C. Most of the lead is also removed in the preheating stage. Specification 755,344 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES844506X | 1957-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB844506A true GB844506A (en) | 1960-08-10 |
Family
ID=8246634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14062/58A Expired GB844506A (en) | 1957-05-13 | 1958-05-02 | A continuous process for the roasting of arsenopyrites ores |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB844506A (en) |
-
1958
- 1958-05-02 GB GB14062/58A patent/GB844506A/en not_active Expired
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