US1144480A - Process for treating complex sulfid ores. - Google Patents
Process for treating complex sulfid ores. Download PDFInfo
- Publication number
- US1144480A US1144480A US380115A US380115A US1144480A US 1144480 A US1144480 A US 1144480A US 380115 A US380115 A US 380115A US 380115 A US380115 A US 380115A US 1144480 A US1144480 A US 1144480A
- Authority
- US
- United States
- Prior art keywords
- treating complex
- ores
- sulfid ores
- solution
- complex sulfid
- 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 - Lifetime
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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
- C22B13/00—Obtaining lead
- C22B13/04—Obtaining lead by wet processes
Definitions
- My invention relates to an improved process for treating complex sulfid ores, such as ores containing galena, zinc, pyrites, etc. It is also applicable to v lead ores which do not carry sulfids.
- the obj ect'of my invention is to avoid the 3 the following metals, antimony, copper, bismuth, etc., on account of the formation of sulfates of the different metals, which are insoluble, and which will always be formed J if the strength of the acid used is greater than five per cent. By the use of five per cent. or less of acid, the formation of sulfates is entirely prevented, nitrates being formed instead, and consequently complete extraction can be effected, the metals being recovered from solutions of nitrates.
- the oxids of nitrogen can be reconverted to nitric acid by well known means.
- the solutions of nitric acid can then be treated for the recovery of lead contents by precipitating the lead in the form of a high grade pigment.
- Lead also may be recovered in the metallic form by Well known means.
- What I claimas my invention is- In the treatment of complex sulfid ores, the process of immersing the ores in a dilute solution of nitric acid of a strength of five per cent. or less, and heated to one hundred and seventy-six degrees Fahr., whereby a nitrate is produced and sulfur in its natural state, as and for the purpose specified.
Description
GEORGE'E. KINGSLEY, or SPOKANE, WASHINGTON.
PROCESS FOR TREATING COMPLEX SULFID ORES.
No Drawing.
To all whom it may concern: 7
Be it known that I, GEORGE E. KINosLEY, a citizen of the United States, residing at the city of Spokane, in the county of Spokane and State of lVashington, have invented a certain new and useful Improved Process for Treating Complex Sulfid Ores, of which the following is a specification.
My invention relates to an improved process for treating complex sulfid ores, such as ores containing galena, zinc, pyrites, etc. It is also applicable to v lead ores which do not carry sulfids.
The obj ect'of my invention is to avoid the 3 the following metals, antimony, copper, bismuth, etc., on account of the formation of sulfates of the different metals, which are insoluble, and which will always be formed J if the strength of the acid used is greater than five per cent. By the use of five per cent. or less of acid, the formation of sulfates is entirely prevented, nitrates being formed instead, and consequently complete extraction can be effected, the metals being recovered from solutions of nitrates.
' It is essential in the operation of my process that the solution be heated to one hundred and seventy-six degrees Fahr. in order that the oxids of nitrogen be liberated and free sulfur deposited. The variation of the degree of heat must be very slight indeed, and I find in practice that the variation of more than one-half degree will afi'ect deleteriously the action of the dilute nitric acid.
To avoid a large-volume of a dilute solution containing a small percentage of metal- Speciflcation 0t Letters Patent.
Patented June 29, 11915.
Application filed January 22, 1915. Serial No. 3,801.
lic contents, when the acid present has used up its energy and the solution is still at the desired temperature five per cent. more acid is added, and so continued until a saturated solution is obtained. The solution is then drawn oil" and a fresh solution added until the metallic contents present is entirely dissolved and free sulfur deposited. By so doing, a great saving is effected in time, fuel and labor. Any convenient form of closed solution tank may be employed, and if desired means can be provided for agitation. After the metals have been dissolved by the nitric acid they can be removed from the solution by well known means.
The oxids of nitrogen can be reconverted to nitric acid by well known means. The solutions of nitric acid can then be treated for the recovery of lead contents by precipitating the lead in the form of a high grade pigment. Lead also may be recovered in the metallic form by Well known means.
Other metals, such as zinc, iron, copper, and silver, if present in the ore, will be dissolved with the lead and can be separated and recovered by well known means of precipitation.
In practice, I have found that the strength of. the solution of nitric acid, as well as the degree of heat, are essential; so much so, indeed, that unless practically the exact strength of acid and degree of heat are followed in carrying out my process, the
result which I desire to obtain cannot "be efiected, and I, therefore, lay emphasis on this fact.
What I claimas my invention is- In the treatment of complex sulfid ores, the process of immersing the ores in a dilute solution of nitric acid of a strength of five per cent. or less, and heated to one hundred and seventy-six degrees Fahr., whereby a nitrate is produced and sulfur in its natural state, as and for the purpose specified.
GEORGE E. KINGSLEY.
Witnesses:
G. J. BOWMAN, HOMER G. KINGSLEY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US380115A US1144480A (en) | 1915-01-22 | 1915-01-22 | Process for treating complex sulfid ores. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US380115A US1144480A (en) | 1915-01-22 | 1915-01-22 | Process for treating complex sulfid ores. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1144480A true US1144480A (en) | 1915-06-29 |
Family
ID=3212569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US380115A Expired - Lifetime US1144480A (en) | 1915-01-22 | 1915-01-22 | Process for treating complex sulfid ores. |
Country Status (1)
Country | Link |
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US (1) | US1144480A (en) |
-
1915
- 1915-01-22 US US380115A patent/US1144480A/en not_active Expired - Lifetime
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