CA2414524A1 - Assaying method - Google Patents
Assaying method Download PDFInfo
- Publication number
- CA2414524A1 CA2414524A1 CA002414524A CA2414524A CA2414524A1 CA 2414524 A1 CA2414524 A1 CA 2414524A1 CA 002414524 A CA002414524 A CA 002414524A CA 2414524 A CA2414524 A CA 2414524A CA 2414524 A1 CA2414524 A1 CA 2414524A1
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- CA
- Canada
- Prior art keywords
- collector material
- outlet duct
- vessel
- oxygen
- separating
- 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.)
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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
- C22B1/00—Preliminary treatment of ores or scrap
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/202—Constituents thereof
- G01N33/2028—Metallic constituents
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux in to the crucible, whereby the mixture is transformed to a molten state to captur e the metal to be assayed in a collector material; and separating slag from th e collector material.
Claims (19)
1. A method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux into the crucible, whereby the mixture is transformed to a molten state to capture the metal to be assayed in a collector material; and separating slag from the collector material.
2. The method according to claim 1 wherein heat energy is added to the reaction vessel and mixture once the latter has been introduced into the reaction vessel to cause fusion of the mixture.
3. The method according to claim 1 or claim 2 wherein the method includes the step of oxidizing the collector material to reduce the volume thereof.
4. The method according to claim 4 wherein the collector material is oxidized by into reducing oxygen or an oxygen producing material into the reaction vessel.
5. The method according to claim 3 or claim 4 wherein oxygen is introduced into the collector material by means of a lance or the like.
6. The method according to claim 3 or claim 4 wherein oxygen is introduced into the collector material through a low level outlet of the reaction vessel for re-oxidizing the collector material.
7. The method according to claim 6 wherein oxygen is introduced into a separation vessel through a low level outlet thereof from a supply source via a collector mould which sealingly engages the separation vessel below the outlet duct thereof.
8. The method according to claim 7 including the step of disengaging the collection mould from the separation vessel after re-oxidization of the collector material to permit collected material to drain into such collection mould.
9. The method according to any one of claims 3 to 8 including the step of introducing an additional collector material which is resistant to oxidization into the reaction vessel.
10. The method according to claim 9 wherein the additional collector material is silver or gold.
11. The method according to any one of claims 1 to 10 including the step of separating the collector material from the slag formed during the fusion process, and thereafter contacting the collector material with oxygen or oxygen forming material to oxidize the collector material or a portion thereof.
12. The method according to claim 11 wherein a stream of oxygen gas is blown onto or into the collector material or oxidization purposes.
13. The method according to any one of claims 1 to 12 including the steps of separating a collector material from slag comprising providing a collector material which is of greater density and/or lower viscosity than the slag, providing a separating vessel which is provided with a outlet duct, and draining the collector material through such outlet duct, the arrangement being one wherein the dimensions of the outlet duct are such that the collector material passes threthrough, while the slag is arrested at the duct.
14. The method according to claim 13 wherein the outlet duct is disposed at the lower extremity of the vessel.
15. A method according to any one of claims 1 to 12 including the steps of separating a collector material from slag comprising providing a separating vessel which defines an interior concavity which terminates in a lower portion for receiving the collector material, and which defines an outlet duct in a position spaced from such lower portion, and comprising the further steps of rotating the reaction and separating vessel transversely so that collector material in the lower-most portion flows to the zone of the outlet duct; and draining such collector material through the outlet duct.
16. The method according to claim 15 wherein the proportions of the outlet duct are such that collector material is capable of passing therethrough while the slag arrested.
17. The method according to claim 15 or claim 16 wherein the vessel has a lower portion for receiving collector material and an outlet duct spaced from such lower portion, a concavity in the zone of the outlet duct including the step of receiving the collector material in the concavity when the vessel is rotated angularly to cause the collector material to flow to the zone of the outlet duct.
18. A method of assaying a mineral sample substantially as herein described and exemplified with reference to the accompanying drawings and examples.
19. A method of assaying a mineral sample for the determination of the concentration of selected metals in the sample comprising the steps of preparing a mineral sample; mixing the mineral sample with a flux which is adapted to form a collector material during fusion thereof; locating the mixture in a reaction vessel applying heat to the reaction vessel to cause fusion of the mixture of flux and mineral sample, whereby a collector material acts to capture the metal to be assayed; separating the collector material from a slag formed and contacting the collector material with oxygen or an oxygen forming material to oxidize the collector material or a portion thereof.
19. The method according to claim 19 wherein the method includes the step of oxidizing such collector material to reduce the volume thereof.
21. The method according to claim 20 wherein the collector material is oxidized by introducing oxygen or an oxygen producing material into the reaction vessel.
22. The method according to any one of claim 19 to 21 wherein oxygen is introduced into the collector material by means of a lance or the like.
23. The method according to any one of claims 19 to 22 wherein oxygen is introduced into the collector material through a low level outlet of the reaction vessel for re-oxidizing the collector material.
24. The method according to any one of claims 19 to 23 wherein oxygen is introduced into the separation vessel through a low level outlet thereof from a supply source via a collector mould which sealingly engages the separation vessel below the outlet duct thereof.
25. The method according to claim 24 including the step of disengaging the collection mould from the separation vessel to permit collected material to drain into such collection mould.
26. The method according to any one of claims 19 to 25 including the step of introducing an additional collector material which is resistant to oxidization into the reaction vessel.
27. The method according to claim 26 wherein the additional collector material is silver or gold.
28. The method according to any one of claims 19 to 27 including the step of separating the collector material from the slag formed during the fusion process, and thereafter contacting the collector material with oxygen or oxygen forming material to oxidize the collector material or a portion thereof.
29. The method according to claim 23 wherein a stream of oxygen gas is blown onto or into the collector material for oxidization purposes.
30. A method of assaying a mineral sample substantially as herein described and exemplified with reference to the accompanying drawings and examples.
31. A method of assaying a mineral sample for the determination of the concentration of selected metals in the sample comprising the steps of preparing a mineral sample; mixing the mineral sample with a flux which is adapted to form a collector material during fusion thereof; locating the mixture in a reaction vessel applying heat to the reaction vessel to cause fusion of the mixture of flux and mineral sample, whereby a collector material acts to capture the metal to be assayed; separating the collector material from a slag formed during the fusion process; and contacting the collector material with oxygen or an oxygen forming material to oxidize the collector material or a portion thereof.
32. A method of assaying a mineral sample according to claim 26 substantially as herein described and exemplified with reference to the accompanying drawings.
33. A method of assaying a mineral sample for the determination of the concentration of selected metals in the sample comprising the steps of preparing a mineral sample; mixing the mineral sample with a flux which is adapted to form a collector material during fusion thereof; locating the mixture in a reaction vessel applying heat to the reaction vessel to cause fusion of the mixture of flux and mineral sample, whereby a collector material acts to capture the metal to be assayed; separating the collector material from a slag formed during the fusion process; and contacting the collector material with oxygen or an oxygen forming material to oxidize the collector material or a portion thereof.
34. A method of assaying a mineral sample according to claim 26 substantially as herein described and exemplified with reference to the accompanying drawings.
35. A method of separating a collector material from slag comprising the steps of providing a collector material which is of greater density and/or lower viscosity than the slag, providing a separating vessel which is provided with a outlet duct, and draining the collector material through such outlet duct, the arrangement being one wherein the dimensions of the outlet duct are such that the collector material passes threthrough, while the slag is arrested at the duct.
36. The method according to claim 35 wherein the outlet duct is disposed at the lower extremity of the vessel.
37. A method of separating collector material from slag according to claim 35 or claim 36 substantially as herein described and exemplified with reference to the accompanying drawings.
38. A method of separating a collector material from slag comprising the steps of providing a separating vessel which defines an interior concavity which terminates in a lower portion for receiving the collector material, and which defines an outlet duct in a position spaced from such lower portion, and comprising the further steps of rotating the reaction and separating vessel transversely so that collector material in the lower-most portion, flows to the zone of the outlet duct; and draining such collector material through the outlet duct.
39. The method of separating collector material according to claim 31 wherein the proportions of the outlet duct are such that collector material is capable of passing therethrough while the slag arrested.
40. The method of separating collector material from slag according to claim 38 or claim 39 wherein the vessel has a lower portion for receiving collector material and an outlet duct spaced from such lower portion, a concavity in the zone of the outlet duct including the step of receiving the collector material in the concavity when the vessel is rotated angularly to cause the collector material to flow to the zone of the outlet duct.
41. A method of separating collector material from slag according to any one of claims 38 to 40 substantially as herein described and exemplified with reference to the accompanying drawings and examples.
42. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a separation vessel, an outlet duct, the arrangement being one wherein the dimensions of the outlet duct are such that collector material passes therethrough while the slag is arrested at the duct.
43. Apparatus according to claim 42 wherein the duct is substantially circular in cross-section and has a diameter of between 0.5mm to 2.0mm.
44. Apparatus according to claim 43 wherein the duct has a diameter of 1.0mm.
45. Apparatus according to any one of claims 42 to 44 substantially as herein described and exemplified with reference to the examples and accompanying drawings.
46. Apparatus suitable for use in the method claimed in any one of claims 3 to comprising a reaction or separating vessel and a lance device projecting into the vessel for introducing oxygen into the vessel.
47. Apparatus according to claim 46 substantially as herein described and exemplified with reference to the accompanying drawings and examples.
48. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a reaction vessel having a low level outlet duct and a collection mould disposed below the outlet duct and adapted sealingly to engage the separation vessel, and an inlet for oxygen or other gas in the collection mould to enable oxygen or gas to be ducted through the interior of the collection mould and the low level outlet duct into the separation vessel.
49. Apparatus according to claim 48 which includes a lifter means whereby the collection mould can be lifted into engagement with the separation vessel and lowered to a position removed from the separation vessel.
50. Apparatus according to claim 48 or claim 49 where the separation vessel includes a downwardly directed tube formation extending from the outlet duct and against which the collection mould sealingly engages.
51. Apparatus according to any one of claims 48 to 50 substantially as herein described and exemplified with reference to the accompanying drawings.
52. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a separating vessel which is defines, an interior concavity which terminates in a lower portion for receiving a collector material and which defines an outlet duct in the position spaced from such lower portion.
53. Apparatus according to claim 52 wherein the outlet duct has such proportion that the collector material is capable of passing therethrough while the slag is arrested.
54. Apparatus according to claim 54 wherein the separating vessel has a lower portion for receiving collector material and an outlet duct spaced from such lower portion, the outlet duct being such that the collector material is capable of passing therethrough but the slag is arrested, and further defining a concavity in the zone of the outlet duct for receiving collector material when the separating vessel is rotated angularly to cause the collector material to flow to the zone of the outlet duct.
55. Apparatus according to anyone of claims 52 to 54 substantially as herein described and exemplified with reference to the accompanying drawings.
56. A handling mechanism suitable for use in the method claimed in any one of claims 1 to 41 for transporting an article such as a reaction vessel into an out of a furnace comprising carrier means, the carrier means being movable between a first position in which it is displaced from the furnace and a second position in which it mates with an aperture in the furnace; and drive means for moving the carrier means between the first and second positions.
57. A handling mechanism according to claim 56 wherein the aperture is located in a base portion of the furnace and the carrier means is suitable for mating with the aperture when in the second position, effectively to close the aperture.
58. The handling mechanism according to claim 57 wherein the handling mechanism according to the invention may include a loading device for transporting an article to the carrier means when the carrier means is in the second position.
59. The handling mechanism according to any one of claims 56 to 58 wherein the loading device is preferably a robotic arm.
60. The handling mechanism according to any one of claims 56 to 59 wherein the drive means is a reciprocating ram, lever, or cam mechanism.
61. A handling mechanism for transporting an article such as a reaction vessel into and out of a furnace according to claim 56 substantially as herein described and exemplified with reference to the drawing and examples.
62. A furnace suitable for use with the handling mechanism claimed in any one of claims 54 to 57 having at least one aperture adapted to mate with the carrier means to substantially seal such aperture.
64. A process for treating an article in a furnace comprising the steps of providing a furnace as claimed in any one of claims 62 or 63 described above; moving the carrier means to the first position; loading the carrier with an article;
moving the carrier means to the second position such that the article is carried into the furnace; and removing the article from the furnace after the required residence time, by moving the carrier means to the first position.
65. A process for treating an article in a furnace substantially as herein described and exemplified with reference to the examples and drawings.
66. A flux suitable for use in the method claimed in any one of claims 1 to 41 which includes the collector material adapted to combine with material in a mineral sample includes potassium hydroxide material.
67. The flux according to claim 66 including between 5% and 60% , preferably 7.5% potassium hydroxide by weight.
68. The flux according to claim 66 or claim 67 including one or more additional compounds selected from the alkaline earth metal group of compounds.
69. The flux according to claim 68 wherein such alkaline earth metal group compounds are hydroxides.
70. The flux according to claim 69 including between 5% and 60% , preferably 7.5% by weight of calcium hydroxide.
71. The flux according to any one of claims 66 to 71 including one or more additional compounds selected from the alkaline metal group, preferably hydroxides.
72. The flux according to claim 71 including between 10% and 19% sodium hydroxide, by weight.
73. A flux substantially as herein described and exemplified with reference to the examples.
19. The method according to claim 19 wherein the method includes the step of oxidizing such collector material to reduce the volume thereof.
21. The method according to claim 20 wherein the collector material is oxidized by introducing oxygen or an oxygen producing material into the reaction vessel.
22. The method according to any one of claim 19 to 21 wherein oxygen is introduced into the collector material by means of a lance or the like.
23. The method according to any one of claims 19 to 22 wherein oxygen is introduced into the collector material through a low level outlet of the reaction vessel for re-oxidizing the collector material.
24. The method according to any one of claims 19 to 23 wherein oxygen is introduced into the separation vessel through a low level outlet thereof from a supply source via a collector mould which sealingly engages the separation vessel below the outlet duct thereof.
25. The method according to claim 24 including the step of disengaging the collection mould from the separation vessel to permit collected material to drain into such collection mould.
26. The method according to any one of claims 19 to 25 including the step of introducing an additional collector material which is resistant to oxidization into the reaction vessel.
27. The method according to claim 26 wherein the additional collector material is silver or gold.
28. The method according to any one of claims 19 to 27 including the step of separating the collector material from the slag formed during the fusion process, and thereafter contacting the collector material with oxygen or oxygen forming material to oxidize the collector material or a portion thereof.
29. The method according to claim 23 wherein a stream of oxygen gas is blown onto or into the collector material for oxidization purposes.
30. A method of assaying a mineral sample substantially as herein described and exemplified with reference to the accompanying drawings and examples.
31. A method of assaying a mineral sample for the determination of the concentration of selected metals in the sample comprising the steps of preparing a mineral sample; mixing the mineral sample with a flux which is adapted to form a collector material during fusion thereof; locating the mixture in a reaction vessel applying heat to the reaction vessel to cause fusion of the mixture of flux and mineral sample, whereby a collector material acts to capture the metal to be assayed; separating the collector material from a slag formed during the fusion process; and contacting the collector material with oxygen or an oxygen forming material to oxidize the collector material or a portion thereof.
32. A method of assaying a mineral sample according to claim 26 substantially as herein described and exemplified with reference to the accompanying drawings.
33. A method of assaying a mineral sample for the determination of the concentration of selected metals in the sample comprising the steps of preparing a mineral sample; mixing the mineral sample with a flux which is adapted to form a collector material during fusion thereof; locating the mixture in a reaction vessel applying heat to the reaction vessel to cause fusion of the mixture of flux and mineral sample, whereby a collector material acts to capture the metal to be assayed; separating the collector material from a slag formed during the fusion process; and contacting the collector material with oxygen or an oxygen forming material to oxidize the collector material or a portion thereof.
34. A method of assaying a mineral sample according to claim 26 substantially as herein described and exemplified with reference to the accompanying drawings.
35. A method of separating a collector material from slag comprising the steps of providing a collector material which is of greater density and/or lower viscosity than the slag, providing a separating vessel which is provided with a outlet duct, and draining the collector material through such outlet duct, the arrangement being one wherein the dimensions of the outlet duct are such that the collector material passes threthrough, while the slag is arrested at the duct.
36. The method according to claim 35 wherein the outlet duct is disposed at the lower extremity of the vessel.
37. A method of separating collector material from slag according to claim 35 or claim 36 substantially as herein described and exemplified with reference to the accompanying drawings.
38. A method of separating a collector material from slag comprising the steps of providing a separating vessel which defines an interior concavity which terminates in a lower portion for receiving the collector material, and which defines an outlet duct in a position spaced from such lower portion, and comprising the further steps of rotating the reaction and separating vessel transversely so that collector material in the lower-most portion, flows to the zone of the outlet duct; and draining such collector material through the outlet duct.
39. The method of separating collector material according to claim 31 wherein the proportions of the outlet duct are such that collector material is capable of passing therethrough while the slag arrested.
40. The method of separating collector material from slag according to claim 38 or claim 39 wherein the vessel has a lower portion for receiving collector material and an outlet duct spaced from such lower portion, a concavity in the zone of the outlet duct including the step of receiving the collector material in the concavity when the vessel is rotated angularly to cause the collector material to flow to the zone of the outlet duct.
41. A method of separating collector material from slag according to any one of claims 38 to 40 substantially as herein described and exemplified with reference to the accompanying drawings and examples.
42. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a separation vessel, an outlet duct, the arrangement being one wherein the dimensions of the outlet duct are such that collector material passes therethrough while the slag is arrested at the duct.
43. Apparatus according to claim 42 wherein the duct is substantially circular in cross-section and has a diameter of between 0.5mm to 2.0mm.
44. Apparatus according to claim 43 wherein the duct has a diameter of 1.0mm.
45. Apparatus according to any one of claims 42 to 44 substantially as herein described and exemplified with reference to the examples and accompanying drawings.
46. Apparatus suitable for use in the method claimed in any one of claims 3 to comprising a reaction or separating vessel and a lance device projecting into the vessel for introducing oxygen into the vessel.
47. Apparatus according to claim 46 substantially as herein described and exemplified with reference to the accompanying drawings and examples.
48. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a reaction vessel having a low level outlet duct and a collection mould disposed below the outlet duct and adapted sealingly to engage the separation vessel, and an inlet for oxygen or other gas in the collection mould to enable oxygen or gas to be ducted through the interior of the collection mould and the low level outlet duct into the separation vessel.
49. Apparatus according to claim 48 which includes a lifter means whereby the collection mould can be lifted into engagement with the separation vessel and lowered to a position removed from the separation vessel.
50. Apparatus according to claim 48 or claim 49 where the separation vessel includes a downwardly directed tube formation extending from the outlet duct and against which the collection mould sealingly engages.
51. Apparatus according to any one of claims 48 to 50 substantially as herein described and exemplified with reference to the accompanying drawings.
52. Apparatus suitable for use in the method claimed in any one of claims 1 to comprising a separating vessel which is defines, an interior concavity which terminates in a lower portion for receiving a collector material and which defines an outlet duct in the position spaced from such lower portion.
53. Apparatus according to claim 52 wherein the outlet duct has such proportion that the collector material is capable of passing therethrough while the slag is arrested.
54. Apparatus according to claim 54 wherein the separating vessel has a lower portion for receiving collector material and an outlet duct spaced from such lower portion, the outlet duct being such that the collector material is capable of passing therethrough but the slag is arrested, and further defining a concavity in the zone of the outlet duct for receiving collector material when the separating vessel is rotated angularly to cause the collector material to flow to the zone of the outlet duct.
55. Apparatus according to anyone of claims 52 to 54 substantially as herein described and exemplified with reference to the accompanying drawings.
56. A handling mechanism suitable for use in the method claimed in any one of claims 1 to 41 for transporting an article such as a reaction vessel into an out of a furnace comprising carrier means, the carrier means being movable between a first position in which it is displaced from the furnace and a second position in which it mates with an aperture in the furnace; and drive means for moving the carrier means between the first and second positions.
57. A handling mechanism according to claim 56 wherein the aperture is located in a base portion of the furnace and the carrier means is suitable for mating with the aperture when in the second position, effectively to close the aperture.
58. The handling mechanism according to claim 57 wherein the handling mechanism according to the invention may include a loading device for transporting an article to the carrier means when the carrier means is in the second position.
59. The handling mechanism according to any one of claims 56 to 58 wherein the loading device is preferably a robotic arm.
60. The handling mechanism according to any one of claims 56 to 59 wherein the drive means is a reciprocating ram, lever, or cam mechanism.
61. A handling mechanism for transporting an article such as a reaction vessel into and out of a furnace according to claim 56 substantially as herein described and exemplified with reference to the drawing and examples.
62. A furnace suitable for use with the handling mechanism claimed in any one of claims 54 to 57 having at least one aperture adapted to mate with the carrier means to substantially seal such aperture.
64. A process for treating an article in a furnace comprising the steps of providing a furnace as claimed in any one of claims 62 or 63 described above; moving the carrier means to the first position; loading the carrier with an article;
moving the carrier means to the second position such that the article is carried into the furnace; and removing the article from the furnace after the required residence time, by moving the carrier means to the first position.
65. A process for treating an article in a furnace substantially as herein described and exemplified with reference to the examples and drawings.
66. A flux suitable for use in the method claimed in any one of claims 1 to 41 which includes the collector material adapted to combine with material in a mineral sample includes potassium hydroxide material.
67. The flux according to claim 66 including between 5% and 60% , preferably 7.5% potassium hydroxide by weight.
68. The flux according to claim 66 or claim 67 including one or more additional compounds selected from the alkaline earth metal group of compounds.
69. The flux according to claim 68 wherein such alkaline earth metal group compounds are hydroxides.
70. The flux according to claim 69 including between 5% and 60% , preferably 7.5% by weight of calcium hydroxide.
71. The flux according to any one of claims 66 to 71 including one or more additional compounds selected from the alkaline metal group, preferably hydroxides.
72. The flux according to claim 71 including between 10% and 19% sodium hydroxide, by weight.
73. A flux substantially as herein described and exemplified with reference to the examples.
Applications Claiming Priority (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA2000/3488 | 2000-07-12 | ||
| ZA200003488 | 2000-07-12 | ||
| ZA200003576 | 2000-07-17 | ||
| ZA2000/3576 | 2000-07-17 | ||
| ZA2000/3575 | 2000-07-17 | ||
| ZA200003575 | 2000-07-17 | ||
| ZA200102216 | 2001-03-16 | ||
| ZA2001/2217 | 2001-03-16 | ||
| ZA2001/2214 | 2001-03-16 | ||
| ZA2001/2216 | 2001-03-16 | ||
| ZA200102214 | 2001-03-16 | ||
| ZA200102217 | 2001-03-16 | ||
| PCT/ZA2001/000092 WO2002004919A2 (en) | 2000-07-12 | 2001-07-12 | Method and apparatus for the assay of precious metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2414524A1 true CA2414524A1 (en) | 2002-01-17 |
| CA2414524C CA2414524C (en) | 2010-11-30 |
Family
ID=27560369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2414524A Expired - Lifetime CA2414524C (en) | 2000-07-12 | 2001-07-12 | Assaying method |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1301781A2 (en) |
| AP (1) | AP1681A (en) |
| AU (2) | AU2001272037B2 (en) |
| BR (1) | BR0112301B1 (en) |
| CA (1) | CA2414524C (en) |
| EA (3) | EA005036B1 (en) |
| WO (1) | WO2002004919A2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003098140A1 (en) * | 2002-05-22 | 2003-11-27 | Innovative Met Products (Pty) Limited | Continuous furnace |
| AU2003252188A1 (en) * | 2002-05-23 | 2003-12-12 | Innovative Met Products (Pty) Limited | Method of ore treatment |
| AU2003204576B2 (en) * | 2002-06-07 | 2008-11-06 | Innovative Met Products (Proprietary) Limited | Method of mineral treatment |
| CA2511533C (en) | 2002-11-14 | 2012-07-10 | Innovative Met Products (Pty) Limited | Separating vessel |
| DE112006002407T5 (en) * | 2005-09-06 | 2008-07-17 | Anglo Platinum Ltd., Marshalltown | Fire sample hot melt composition for the analysis of PGM and gold containing mineral samples |
| GB2450896A (en) * | 2007-07-10 | 2009-01-14 | Anglo American Platinum Corp | Separating apparatus and method for assaying |
| RU2494160C1 (en) * | 2012-05-11 | 2013-09-27 | Общество с ограниченной ответственностью "БИНОТЕК" | Method of determination of gold and silver content in sulphide ores and products of their processing |
| AU2015100109A4 (en) * | 2014-03-18 | 2015-03-12 | Subhash KADAM | Metallurgy of noble metals found from the soil of mangalwedha |
| MX2017011314A (en) * | 2015-03-06 | 2018-05-15 | Imp Group Pty Ltd | A method and a container for preparing a fused sample for analysis. |
| RU2685562C1 (en) * | 2017-12-28 | 2019-04-22 | федеральное государственное бюджетное образовательное учреждение высшего образования "Алтайский государственный университет" | Extraction-atomic-absorption method for determining gold traces in technical and ore solid samples |
| CN108173423B (en) * | 2018-02-07 | 2023-11-24 | 东莞育嘉电子有限公司 | Diode discharge circuit for chassis power supply |
Family Cites Families (4)
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| US3652427A (en) * | 1969-12-22 | 1972-03-28 | Little Inc A | Method for monitoring the oxygen and carbon contents in a molten metal |
| DE2507961C3 (en) * | 1975-02-25 | 1978-07-20 | Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg | Process for making steel from pig iron |
| US5279644A (en) * | 1993-02-18 | 1994-01-18 | Asarco Incorporated | Fire refining precious metals asay method |
| US7025936B1 (en) * | 1998-10-29 | 2006-04-11 | Fls Automation South Africa (Proprietary) Limited | Method and apparatus for preparing a sample for analysis of precious metal content |
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2001
- 2001-07-12 EA EA200300138A patent/EA005036B1/en not_active IP Right Cessation
- 2001-07-12 CA CA2414524A patent/CA2414524C/en not_active Expired - Lifetime
- 2001-07-12 EA EA200400378A patent/EA006041B1/en not_active IP Right Cessation
- 2001-07-12 EA EA200400377A patent/EA006151B1/en not_active IP Right Cessation
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- 2001-07-12 AU AU7203701A patent/AU7203701A/en active Pending
- 2001-07-12 BR BRPI0112301-7A patent/BR0112301B1/en not_active IP Right Cessation
- 2001-07-12 EP EP01951108A patent/EP1301781A2/en not_active Withdrawn
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- 2001-07-12 WO PCT/ZA2001/000092 patent/WO2002004919A2/en active IP Right Grant
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| AP1681A (en) | 2006-11-27 |
| EA006041B1 (en) | 2005-08-25 |
| EA200400378A1 (en) | 2004-06-24 |
| BR0112301A (en) | 2003-07-08 |
| BR0112301B1 (en) | 2013-03-19 |
| AU2001272037B2 (en) | 2005-07-07 |
| EA006151B1 (en) | 2005-10-27 |
| WO2002004919A2 (en) | 2002-01-17 |
| CA2414524C (en) | 2010-11-30 |
| EA005036B1 (en) | 2004-10-28 |
| AU7203701A (en) | 2002-01-21 |
| EA200400377A1 (en) | 2005-04-28 |
| EA200300138A1 (en) | 2003-06-26 |
| AP2003002714A0 (en) | 2003-03-31 |
| EP1301781A2 (en) | 2003-04-16 |
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