AU2006314404B2 - Method for decomposing metal sulphate - Google Patents
Method for decomposing metal sulphate Download PDFInfo
- Publication number
- AU2006314404B2 AU2006314404B2 AU2006314404A AU2006314404A AU2006314404B2 AU 2006314404 B2 AU2006314404 B2 AU 2006314404B2 AU 2006314404 A AU2006314404 A AU 2006314404A AU 2006314404 A AU2006314404 A AU 2006314404A AU 2006314404 B2 AU2006314404 B2 AU 2006314404B2
- Authority
- AU
- Australia
- Prior art keywords
- sulphate
- decomposition
- metal
- nickel
- sulphur
- 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.)
- Ceased
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims description 36
- 229910021653 sulphate ion Inorganic materials 0.000 title claims description 35
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052952 pyrrhotite Inorganic materials 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 16
- 239000005864 Sulphur Substances 0.000 claims description 16
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical group [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 10
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000001117 sulphuric acid Substances 0.000 claims description 6
- 235000011149 sulphuric acid Nutrition 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical class [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 5
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical group [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 5
- 229910052683 pyrite Inorganic materials 0.000 claims description 5
- 239000011028 pyrite Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000005569 Iron sulphate Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 22
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 3
- 150000004706 metal oxides Chemical class 0.000 abstract description 3
- 229910001092 metal group alloy Inorganic materials 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000004291 sulphur dioxide Substances 0.000 description 7
- 235000010269 sulphur dioxide Nutrition 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000004763 sulfides Chemical class 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
- C01B13/185—Preparing mixtures of oxides
-
- 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
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
-
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/745—Preparation from sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The method of the invention relates to the decomposition in a fluidized bed of metal sulphates generated in the metallurgical industry. The decomposition of metal sulphates is carried out so that the metal oxides generated are recovered in such a pure form that they can be recycled to be reused in the manufacture of metal alloys such as steel. In particular, sulphates containing nickel, iron and chrome are decomposed in oxidising conditions using pyrites or pyrrhotite as the fuel and bed material.
Description
WO 2007/057504 PCT/F12006/000361 1 METHOD FOR DECOMPOSING METAL SULPHATE FIELD OF THE INVENTION The method of the invention relates to the decomposition in a fluidised bed of 5 metal sulphates generated in the metallurgical industry. The decomposition of metal sulphates is carried out so that the metal oxides generated are recovered in such a pure form that they can be recycled to be used again in the manufacture of metal alloys such as steel. In particular, sulphates containing nickel, iron and chrome are decomposed in oxidising conditions io using pyrites or pyrrhotite as the former and fuel of the bed material. BACKGROUND OF THE INVENTION Metal sulphates are generated in various metallurgical processes such as for example during steel pickling or in the electrolytic purification of metal into 15 anodic sludge. Mixed sulphate waste containing sulphuric acid cannot be used as such anywhere, and is largely hazardous waste. US patent 4,824,655 describes a method for producing sulphur dioxide by the thermal decomposition of sulphur-containing metal sulphates in a 20 fluidized bed. The metal sulphate is mainly iron sulphate, which includes a small amount of other metals such as compounds of aluminium, magnesium, titanium, manganese, chrome and vanadium. The sulphate originates largely from the manufacture of titanium. The decomposition of metal sulphate occurs at a temperature of 800 - 11 00 0 C. It is essential that sulphur 25 containing material, such as sulphur waste or fine pyrites, be used in sulphate reduction in order to produce the largest possible amount of sulphur dioxide. The energy required for sulphate reduction is produced with a carbon-containing fuel such as coal, coke or heavy fuel oil. The majority of the fuel is introduced with the bed material, but some is fed separately with 30 the carrier gas. The key point in the method is the production of sulphur dioxide, and there is no mention of the use of the metal-containing solids that are generated, so they go to waste. The amount of waste generated in this 2 way is considerable. The feed of extra fuel, particularly of extra liquid or gaseous fuel, makes it difficult to keep the temperature regulated evenly, since localised feeding to the bed may result in hot spots, which cause the sintering of the bed. 5 Carbon-containing fuel creates carbon dioxide emissions, and the aim is to reduce the amount of these emissions. PURPOSE OF THE INVENTION The purpose of the method of this invention is to avoid the drawbacks of the 10 method described above. The aim of the method now developed is to decompose metal sulphates generated in the metallurgical industry, particularly mixed sulphates that contain nickel, so that the fuel used in their decomposition produces bed material on oxidising, whereupon the uniform distribution of fuel prevents the generation of hot spots. The fuel does not contain carbon either, so 15 that carbon dioxide emissions are not produced. SUMMARY OF THE INVENTION The essential features of the invention will be made apparent in the attached claims. 20 The invention relates to a method for the decomposition of a residue generated in the metallurgical industry, containing at least one metal sulphate, into oxides and sulphur dioxide that is used for the manufacture of sulphur and/or sulphuric acid. The decomposition of nickel containing metal sulphide is performed in a 25 fluidised bed furnace at a temperature of 800 - 9000C, whereby the energy required for decomposing the sulphate is obtained from roasting the iron sulphide used as the bed material. Roasting is performed in oxidising conditions to form an oxide having a maximum of 0.5wt% sulphur for reuse in the steel industry. 30 According to one embodiment of the invention the metal sulphate is a mixed sulphate, including nickel, chrome and iron sulphate. Mixed sulphate is for instance the mixed sulphate generated during the pickling of steel.
3 According to another embodiment of the invention the metal sulphate is nickel sulphate. Nickel sulphate is formed for instance during the electrolytic purification of copper. 5 The iron sulphide used as the fluidised bed material and energy producer is pyrite and/or pyrrhotite. The decomposition of sulphate is carried out at a temperature of 800 - 900*C and the residence time in the bed is around 1 - 5 h. DETAILED DESCRIPTION OF THE INVENTION 10 Impure sulphate sediments are generated in the metallurgical industry, such as in steel manufacture and the electrolytic purification of metals, which contain sulphates of nickel, chrome and iron etc. Sulphates are soluble enough that they cannot be removed from the circuit as they are but in addition their metal content should be recovered in an environment-friendly way. As described in the 15 prior art, sulphate residues, in particular those generated during the manufacture of titanium, are treated in a fluidised bed furnace, but mainly in order to produce sulphur dioxide gas for the manufacture of sulphuric acid. Mixed sulphate precipitate is generated in the pickling stage of steel 20 manufacture, containing in addition to iron sulphates (FeSO 4
H
2 0, Fe 2 (SO4) 3 ) also nickel and chrome sulphate (NiSO 4 , Cr 2
(SO
4
)
3 ) and sulphuric acid. In oxidising conditions iron sulphates and chrome sulphate decompose at a far lower temperature than nickel sulphate. Nickel sulphate may also decompose at lower temperatures in reducing conditions, but then there is a danger that in 25 addition to oxides, sulphides will also form. When the purpose is to produce a product fit for a steelworks for example, its sulphur content must be quite low i.e. below 0.5 wt%.
WO 2007/057504 PCT/F12006/000361 4 The end product of the pyrometallurgical fabrication of copper is copper anode, which is further purified electrolytically into pure cathode copper. The anode sludge that is generated contains the impurities of the anode, of which nickel in the form of nickel sulphate is one of the most significant. 5 The decomposition of sulphates into oxides is an endothermic reaction. In the method according to the prior art, the bed of the fluidised bed furnace was formed so that reducing sulphur-containing material and some of the carbon-containing fuel were mixed with the sulphates, pelletised and then fed 10 into the furnace. In addition, part of the fuel was fed separately. In the method now developed the fuel required for decomposition acts as the bed material i.e. no separate carbon-containing fuel is required at all. Iron sulphide such as pyrite or pyrrhotite acts as the fuel and bed material, which is roasted and, simultaneously, the sulphates fed into the bed are 15 decomposed into their oxides. The reactions that occur in iron sulphide roasting are so exothermic that the heat generated is enough for the endothermic reactions required in sulphate decomposition without the need for any extra heat. 20 Sulphate decomposition is carried out at a temperature of 800 - 9000C and the residence time in the bed is around 1 - 5 h. In particular the decomposition of nickel sulphate requires the temperature mentioned above, in order for the decomposition into oxides to take place in a reasonable time. The invention relates thus to a method for the decomposition of one or more 25 metal sulphates, where nickel sulphate is preferably one of the sulphates. Sulphate decomposition is carried out in oxidising conditions, in order to avoid sulphur remaining in any form among the oxides. Sulphur-free oxides are fit for reuse e.g. in a steelworks. The sulphur dioxide-containing gases that are formed are routed to sulphur and/or sulphuric acid manufacture, but 30 the process is regulated on the basis of producing metal oxides that are as pure as possible rather than sulphur dioxide production.
5 It is preferable to keep the sulphur content of the oxide alloy to be fed to the steelworks as small as possible, since it will reduce the demand for oxygen used for sulphur removal in conversion. 5 When all the energy required for sulphate decomposition is brought in the form of bed material, the drawbacks that can arise from feeding fuel to the bed separately can be avoided. The use of separate fuel is awkward because it is difficult to feed it into the bed so evenly that no localised hot spots are generated where the bed material and sulphates would be sintered. Hot localised points 10 are also harmful to the equipment. Introducing a separate fuel to the fluidised bed means carbon-containing material, generally feeding gas into the bed. The drawback of carbon-containing fuel is that the fuel produces carbon dioxide emissions and in addition it requires a post-combustion chamber as additional equipment. 15 When iron sulphides are used as the energy producer in the fluidised bed decomposition of sulphates, it is easy to control the shutdown of the bed nor does a malfunction in the sulphate feed cause problems. When using iron sulphides the operation is run in oxidising conditions, and there are no additional 20 sulphides to be burnt in the bed. If the operation is run in reducing conditions and there is a malfunction, then the sulphides burn and hot spots, molten phase and sintering occur. It is to be understood that, if any prior art publication is referred to herein, such 25 reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. EXAMPLES Example 1 30 The decomposition of impure nickel sulphate was carried out in a fluidised bed furnace using pyrite as bed material and fuel. Air was used as the fluidising air and fluidising was carried out at a rate of 0.2 m/s in slightly oxidising conditions. After 1.5 h the sulphur concentration of the nickel oxide removed from the furnace was 0.34 % and after 3 h it was 0.15 %, so that it was highly suitable for 35 recycling to the steel industry.
WO 2007/057504 PCT/F12006/000361 6 Example 2 The decomposition of mixed sulphate was performed in a fluidised bed furnace, where the composition of the mixed sulphate was Fe 12.8%, Cr 1.8%, Ni 1.8%, Mo 0.08% and SO 4 44.4%. Pyrite was used as fuel and bed 5 material. Air was used as the fluidising air and fluidising was carried out at a rate of 0.2 m/s in slightly oxidising conditions. After 1.5 h the sulphur concentration of the oxide mixture removed from the furnace was 0.32 % and after 3 h it was 0.17 %, so it was highly suitable for recycling to the steel industry. 10
Claims (2)
1. A method for decomposing a residue generated in the metallurgical industry that includes at least one metal sulphate into oxide and sulphur 5 dioxide that is used for the manufacture of sulphur and/or sulphuric acid, characterised in that the decomposition of the nickel containing metal sulphate is carried out in a fluidised bed furnace at a temperature of
800-900 0 C, whereby the energy required for sulphate decomposition is obtained from roasting of an iron sulphide used as the furnace bed 10 material, the decomposition is carried out in oxidising conditions to form an oxide having a maximum of 0.5wt% sulphur, for recycling to the steel industry. 2. A method according to claim 1, characterised in that the metal 15 sulphate is a mixed sulphate, which includes nickel, chrome and iron sulphates. 3. A method according to claim 1 or 2, characterised in that the metal sulphate is a nickel-chrome-iron sulphate generated during pickling in 20 steel industry. 4. A method according to claim 1, characterised in that the metal sulphate is nickel sulphate. 25 5. A method according to claim 1 or 4, characterised in that the metal sulphate is a nickel sulphate generated in an electrolytic purification of copper. 6. A method according to any of claims 1 - 5, characterised in that the 30 iron sulphide is pyrite and/or pyrrhotite. 8 7. A method according to any of claims 1 - 6, characterised in that the decomposition time is 1 - 5 h. 5 8. A method for decomposing a residue generated in the metallurgical industry substantially as herein described with reference to the accompanying examples. 10
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20051180A FI120338B (en) | 2005-11-18 | 2005-11-18 | Process for decomposing a metal sulfate |
| FI20051180 | 2005-11-18 | ||
| PCT/FI2006/000361 WO2007057504A1 (en) | 2005-11-18 | 2006-11-10 | Method for decomposing metal sulphate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2006314404A1 AU2006314404A1 (en) | 2007-05-24 |
| AU2006314404B2 true AU2006314404B2 (en) | 2012-04-19 |
Family
ID=35458786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006314404A Ceased AU2006314404B2 (en) | 2005-11-18 | 2006-11-10 | Method for decomposing metal sulphate |
Country Status (6)
| Country | Link |
|---|---|
| CN (2) | CN104129819A (en) |
| AU (1) | AU2006314404B2 (en) |
| EA (1) | EA014826B1 (en) |
| FI (1) | FI120338B (en) |
| WO (1) | WO2007057504A1 (en) |
| ZA (1) | ZA200804071B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318849A (en) * | 2013-07-10 | 2013-09-25 | 四川大学 | Method for recycling sulfur-iron resources |
| CN109365799B (en) * | 2018-09-19 | 2024-04-23 | 上海新池能源科技有限公司 | Preparation method of graphene-coated metal powder and metal-based-graphene electrical contact |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721591A (en) * | 1951-03-28 | 1955-01-12 | British Titan Products | Improvements relating to processes for the recovery of sulphur-values from waste products |
| GB727799A (en) * | 1952-01-01 | 1955-04-06 | Dorr Co | Simultaneous decomposition of pyrite and feso |
| US3053626A (en) * | 1959-05-08 | 1962-09-11 | Chempro Inc | Decomposition of heavy metal sulfate solutions with the recovery of sulfur dioxide and the heavy metal oxide |
| GB1484811A (en) * | 1974-01-17 | 1977-09-08 | Metallgesellschaft Ag | Process for the thermal splitting of metal sulphates |
| EP0262564A2 (en) * | 1986-10-03 | 1988-04-06 | Bayer Ag | Process for the preparation of sulphur dioxide |
-
2005
- 2005-11-18 FI FI20051180A patent/FI120338B/en not_active IP Right Cessation
-
2006
- 2006-11-10 AU AU2006314404A patent/AU2006314404B2/en not_active Ceased
- 2006-11-10 CN CN201410333393.8A patent/CN104129819A/en active Pending
- 2006-11-10 EA EA200801102A patent/EA014826B1/en not_active IP Right Cessation
- 2006-11-10 CN CNA2006800429523A patent/CN101309858A/en active Pending
- 2006-11-10 WO PCT/FI2006/000361 patent/WO2007057504A1/en not_active Ceased
-
2008
- 2008-05-13 ZA ZA200804071A patent/ZA200804071B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721591A (en) * | 1951-03-28 | 1955-01-12 | British Titan Products | Improvements relating to processes for the recovery of sulphur-values from waste products |
| GB727799A (en) * | 1952-01-01 | 1955-04-06 | Dorr Co | Simultaneous decomposition of pyrite and feso |
| US3053626A (en) * | 1959-05-08 | 1962-09-11 | Chempro Inc | Decomposition of heavy metal sulfate solutions with the recovery of sulfur dioxide and the heavy metal oxide |
| GB1484811A (en) * | 1974-01-17 | 1977-09-08 | Metallgesellschaft Ag | Process for the thermal splitting of metal sulphates |
| EP0262564A2 (en) * | 1986-10-03 | 1988-04-06 | Bayer Ag | Process for the preparation of sulphur dioxide |
Also Published As
| Publication number | Publication date |
|---|---|
| FI20051180L (en) | 2007-05-19 |
| WO2007057504A1 (en) | 2007-05-24 |
| EA200801102A1 (en) | 2008-10-30 |
| ZA200804071B (en) | 2009-04-29 |
| FI120338B (en) | 2009-09-30 |
| FI20051180A0 (en) | 2005-11-18 |
| CN104129819A (en) | 2014-11-05 |
| EA014826B1 (en) | 2011-02-28 |
| AU2006314404A1 (en) | 2007-05-24 |
| CN101309858A (en) | 2008-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102372248B1 (en) | Valuable metal recovery method from waste secondary batteries using thermite smelting method | |
| FI71339C (en) | SAETT ATT UTVINNA METALLER UR FLYTANDE SLAGG | |
| CN116457088B (en) | Catalytic material for methane pyrolysis and hydrogen and solid carbon production with substantially zero atmospheric carbon emissions | |
| AU2022280352A1 (en) | Energy-efficient pyrometallurgical process for treating li-ion batteries | |
| CN101595056A (en) | Oxidation of metal feedstock as part of extraction, purification and/or refining processes | |
| Jones et al. | Plasma developments in Africa | |
| CA1143694A (en) | Method of winning aluminum metal from aluminous ore | |
| AU2006314404B2 (en) | Method for decomposing metal sulphate | |
| KR101189182B1 (en) | Method for separating vanadium from vanadium-containing melt | |
| Yucel et al. | Recovery of cobalt from copper slags | |
| Dhiman et al. | Hydrometallurgical separation of iron and copper from copper industrial dust waste and recovery of copper as copper oxide | |
| GB2077768A (en) | Recovering Non-volatile Metals from Dust Containing Metal Oxides | |
| US20240026476A1 (en) | Method and apparatus for metals, alloys, mattes, or enriched and cleaned slags production from predominantly oxide feeds | |
| CN111250176A (en) | Spent hydroprocessing catalyst treatment system and method | |
| CN212316200U (en) | Device for producing black copper from copper-containing sludge | |
| JP2008546906A (en) | Method and apparatus for treating metal chloride solutions and producing reduced iron directly | |
| CN115849407A (en) | Method for removing organic matters in waste salt by oxygen-enriched gasification coupled catalytic combustion | |
| US4737187A (en) | Method of treating nickel-containing and vanadium-containing residues | |
| KR101189183B1 (en) | Recovery method of valuable metals from spent petroleum catalysts | |
| US20200048092A1 (en) | Process for recovering phosphorous from phosphoritic materials | |
| JP7688653B2 (en) | A sustainable method for recycling smelter dust and sludge to recover lead and zinc and produce iron-bearing recycled material with heavy metals removed | |
| CN1312300C (en) | Method for recovery of valuable metals from waste containing V, Mo and Ni | |
| NO743951L (en) | ||
| CN121087288A (en) | A comprehensive utilization method for nickel-containing waste | |
| SK106297A3 (en) | Process for processing waste or fractions thereof, especially light car shredder fractions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |