US12948A - Improvement in processes for treating auriferous and argentiferous sulphurets - Google Patents
Improvement in processes for treating auriferous and argentiferous sulphurets Download PDFInfo
- Publication number
- US12948A US12948A US12948DA US12948A US 12948 A US12948 A US 12948A US 12948D A US12948D A US 12948DA US 12948 A US12948 A US 12948A
- Authority
- US
- United States
- Prior art keywords
- sulphurets
- argentiferous
- improvement
- processes
- nitrate
- 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
Links
- 238000000034 method Methods 0.000 title description 16
- VWDWKYIASSYTQR-UHFFFAOYSA-N Sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 14
- FGIUAXJPYTZDNR-UHFFFAOYSA-N Potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 8
- 229910052737 gold Inorganic materials 0.000 description 8
- 239000010931 gold Substances 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 229910052709 silver Inorganic materials 0.000 description 8
- 229940009188 silver Drugs 0.000 description 8
- 239000004332 silver Substances 0.000 description 8
- 235000010333 potassium nitrate Nutrition 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- 206010015150 Erythema Diseases 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 101710024788 HOMER1 Proteins 0.000 description 2
- VYAXJSIVAVEVHF-RYIFMDQWSA-N [(8R,9S,13S,14S,17S)-17-(cyclohexen-1-yloxy)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl] propanoate Chemical compound O([C@@H]1[C@@]2(C)CC[C@@H]3C4=CC=C(C=C4CC[C@H]3[C@@H]2CC1)OC(=O)CC)C1=CCCCC1 VYAXJSIVAVEVHF-RYIFMDQWSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004166 bioassay Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N sulfonic acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
Definitions
- phurets is the nitrate of soda-an article, 1 be"- lieve, not hitherto employed in any process of dry assaying,and oneof which I have found no mention in any work orftreatise on metallurgy.
- the nitrate of potash which in its general chemical character somewhat resembles the nitrateof soda, has heretofore been-used in a single crystal"forblow-pipe testing, and to.
- the heat moderate at first, is gradually to be increased until the sulphurous-acid vapors have entirely passed-oh, and full oxidation and redness of the ores are ob; tained.
- the silver or gold, or both, previouslyzcontained in the ore will be found reduced to fine grains or particles, which may be readilyseparated by means of a con- -centrator, or amalgamated by mercury from theresolved anddecomposed mass in the same manner as from any other aurife'rous and argentiferous sands or oxides.
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)
Description
UNITED STATES PATENT OFFICE.
HOMER HOLLAND, OF WESTFIELD, MASSACHUSETTS.
Specification forming part of Letters Patent No. l 2,94 5, dated May 29, 1855.
phurets is the nitrate of soda-an article, 1 be"- lieve, not hitherto employed in any process of dry assaying,and oneof which I have found no mention in any work orftreatise on metallurgy. The nitrate of potash, which in its general chemical character somewhat resembles the nitrateof soda, has heretofore been-used in a single crystal"forblow-pipe testing, and to.
'scarify and oxidize in remelting gold and sil ver inzthe crucible; but it is utterly impracti cable in any hitherto recognized process for separating gold and silver fromthe sulphurets on a larger scale, since it readily ignites, 'and its combustion is so violent and explosive as to eject, the matter from the crucible, while the heat that it generates is so intense as to volatilize a portion of the metals subjected to its influence; and, indeed, the use of the nitrateof potash, even indry crucible assays, is now,
according to the best authorities, obsolete. But on the other hand I have discovered, and through my process am able to make use of, certain properties in the nitrate of soda which render it highly useful in the disintegration and resolution of metalliferous sulphuret-s, and which show-that. it is very difi'erent in its action from the nitrate of potash. Unlike the last-mentioned salt, the nitrate of soda, when ignited, burns slowly and mildly, and more especially so with the metallife'rons sulphurets, while there is also neither violent action to explode and scatter the mixture,nor heat generated sufticientlyintense to volatilize the metals. This hitherto unrecognized difference in the action of the nitrate of potash and the hitrate of soda on metallil'erous sulphurets isthe property which I make use of in my invention, and which I believe to'be clearly distinguishable from all processes hitherto adopted, for although it consists in part of so well known a material as the nitrate of soda, yet this material is so combined with and proportioned to the ores acted upon by the method persued in my process as to give to the practical metallurgist advantages essentially different from those he can obtain by any other method practiced for the dry assaying of the precious met als.
The manner in which my process is conducted is as follows: A'quantity of the nitrate of soda asfree as possible from any admixture with other salts is provided, togetherwvith a quantity of any metalliferous sulphuret, both being separately or jointly finely 'pulveri'zedby means of Bogarduss eccentric mill or any other suitable mechanical contrivance, and then thoroughly mixed together in a dry state in theproportion of two hundred and ninetyone parts of the nitrate of sodato' every hun dred parts of the sulphur previously dete'i' mined and known to exist in the ore to be operated upon; About one-third part of this mixture must then be deflagrated in a large cast-iron basin having aconcave soleorhearth, like that of a Glausthal cupel, heated from he neath to moderate redness, a'nda-t separate intervals of about half an hour each'the remain ing two-thirds are to be added while the mass in the basin is being thoroughly stirred and intermixed. Then the heat, moderate at first, is gradually to be increased until the sulphurous-acid vapors have entirely passed-oh, and full oxidation and redness of the ores are ob; tained. When cooled'down the silver or gold, or both, previouslyzcontained in the ore will be found reduced to fine grains or particles, which may be readilyseparated by means of a con- -centrator, or amalgamated by mercury from theresolved anddecomposed mass in the same manner as from any other aurife'rous and argentiferous sands or oxides. In soineinstances, however, andmore especially in treating the bisulphure'ts, it \vill be found expedient to subject the pulverized ore to a preliminary roasting, in order to expel in an acid form some'portion of the sulphur, by. which means a certain amount of the nitrate of soda will be saved in the operation; and consequently I do not and cannot in any way restrict myself to any precise'ratio of the proportions of the sen eral ores and nitrate of soda, since a greater or less proportion of the salt will, under difi erentcircumstances, to a certain extent, effect the decomposition required. An rexcess can in no instance whatever'either injure the process or yitiate the result, nor can likewise the degree of transmitted heat, provided, always,it be moderate at first and increased gradually. Neither is it absolutely necessary .that in all cases the nitrate of soda should be mixedlhefore roasting wit-hthe ore,since in some instances it may be found advantageous to gradually stir it in while the ore is being roasted.
When coppcrpyrites are decomposed and resolved by my process, it will be found advantageous. to lixiviate the cooled mass with water, so as to dissolve the sulphate of copper,
which other-wise would attack the mercury used in amalgamating the gold or silver. Having now described and particularly set forththe nature of myinvention and the manne-rin which the same is or may be used or carriedintopflect. I would observe, in conclu- "2 teens In witness whereof I, the said HOMER HOL- LANmh ave hereunto set my hand and seal this 7th day of May', 1855.
HOMER HOLLAND n s.]
Witnesses:
STAFFORD REEVES, J. WINcansrEs.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US12948A true US12948A (en) | 1855-05-29 |
Family
ID=2073281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12948D Expired - Lifetime US12948A (en) | Improvement in processes for treating auriferous and argentiferous sulphurets |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US12948A (en) |
-
0
- US US12948D patent/US12948A/en not_active Expired - Lifetime
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