CN112284959A - Method for determining influence of gold-robbing substances in gold ore product on gold and silicate-coated gold - Google Patents
Method for determining influence of gold-robbing substances in gold ore product on gold and silicate-coated gold Download PDFInfo
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- CN112284959A CN112284959A CN202011099835.9A CN202011099835A CN112284959A CN 112284959 A CN112284959 A CN 112284959A CN 202011099835 A CN202011099835 A CN 202011099835A CN 112284959 A CN112284959 A CN 112284959A
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 239000010931 gold Substances 0.000 title claims abstract description 132
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000126 substance Substances 0.000 title claims abstract description 36
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002386 leaching Methods 0.000 claims abstract description 65
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 16
- 239000011707 mineral Substances 0.000 claims abstract description 16
- 239000000047 product Substances 0.000 claims description 46
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- VNTKRIKCFGOCSI-UHFFFAOYSA-I [Au+3].[I-].[K+].[I+].[I-].[I-].[I-].[I-] Chemical compound [Au+3].[I-].[K+].[I+].[I-].[I-].[I-].[I-] VNTKRIKCFGOCSI-UHFFFAOYSA-I 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 claims description 6
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000001119 stannous chloride Substances 0.000 claims description 6
- 235000011150 stannous chloride Nutrition 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000857 drug effect Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 6
- 229910001748 carbonate mineral Inorganic materials 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 229910052976 metal sulfide Inorganic materials 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
Abstract
The invention belongs to the technical field of gold content determination in gold ore products, and particularly relates to a method for determining influence of gold-robbing substances in gold ore products on gold and silicate-coated gold; compared with a one-step leaching method process which directly utilizes aqua regia to simultaneously remove metal minerals and gold minerals, the gold mineral leaching processed by the step-by-step method is more thorough, has less intermediate interference factors and more stable drug effect, and the obtained data is more accurate.
Description
Technical Field
The invention belongs to the technical field of gold content determination in gold ore products, and particularly relates to a method for determining influence of gold-robbing substances in gold ore products on gold and silicate-coated gold.
Background
In recent years, along with the gradual shortage of gold ore resources, gold ores face various problems of low grade, fine granularity, a plurality of mineralogical factors influencing gold recovery in the ores and the like, and gold-robbing substances are one of the mineralogical factors influencing gold recovery. The research on the influence of gold-robbing substances on gold and silicate-coated gold is particularly important, because silicate-coated gold cannot be recovered by conventional means in a flotation process or a gold extraction process by using a gold leaching agent, and the influence of gold-robbing substances on gold is a part of gold which is difficult to recover in ores. Therefore, finding out the contents of the two parts of gold is a prerequisite condition for determining which ore grinding fineness is adopted and which process flow is adopted to remove adverse factors, and is a key basis for judging whether the recovery rate of gold can be further improved.
However, at present, no method for accurately measuring the influence of silicate-coated gold and gold-robbing substances in gold ores on the gold content exists.
Disclosure of Invention
In order to overcome the problems, the invention provides a method for measuring gold and silicate-coated gold influenced by gold-robbing substances in a gold ore product, which mainly aims at measuring gold and silicate-coated gold influenced by the gold-robbing substances in the gold ore product containing organic carbon and other gold-robbing substances.
The method for determining influence of gold-robbing substances in gold ore products on gold and silicate-coated gold comprises the following steps:
step one, selecting gold ore containing gold-robbing substances affecting gold as raw ore, grinding the raw ore to prepare a gold ore product with required fineness, analyzing the gold grade J in the gold ore product, and simultaneously taking a test sample with the mass W from the gold ore product;
step two, adding nitric acid with the mass concentration of 68% into a test sample with the mass of W as an extracting agent, wherein the solid-to-liquid ratio of the test sample to the extracting agent is 1:4, heating in a water bath at 50-70 ℃, shaking or stirring for 3 hours, washing and filtering the precipitate, pouring out the filtrate, and taking the filter residue;
adding 9.5% by mass of dilute hydrochloric acid serving as an extracting agent into the filter residue obtained in the second step, wherein the solid-to-liquid ratio of the filter residue to the dilute hydrochloric acid is 1:4, dripping a reducing agent prepared from stannous chloride and 19% by mass of dilute hydrochloric acid by using a rubber head dropper, wherein the dripping amount is 0.5 drops/g, heating in a water bath at 50-70 ℃, simultaneously shaking or stirring for 2 hours, washing and filtering the precipitate, pouring out the filtrate, and taking the filter residue which is a product after removing oxides;
step four, drying the product obtained in the step three after removing the oxide and recording the weight, wherein the quality of the dried product after removing the oxide is recorded as WabThen the mass is WabThe product of (A) was divided into two parallel samples, weighed separately and the mass was recorded as Wa、WbMass is WaLeaching the gold minerals by using a group of parallel samples, filtering to obtain filter residues after complete leaching, drying the leaching residues and recording the weight, wherein the quality of the dried leaching residues is recorded as W1aAnd analyzed by mass W1aGold grade J in the leaching residuea；
Step five, the mass is WbRemoving gold-robbing substances from the other group of parallel samples by a roasting method, leaching gold, filtering to obtain leaching residue after gold leaching is completed, drying the leaching residue, and recording the weight, wherein the quality of the dried leaching residue is recorded as W1bAnd analyzed by mass W1bGold grade J in the leaching residueb；
Calculating the relative content Q of the silicate-coated gold in the gold ore product and the relative content X of the gold in the gold ore product influenced by the gold-robbing substances according to the following formula:
Q＝(Jb/J)*(W1b/Wb)*(Wab/W)*100％；
X＝(Ja/J)*(W1a/Wa)*(Wab/W)*100％-Q。
the preparation method of the reducing agent in the third step comprises the following steps: the stannous chloride and the dilute hydrochloric acid with the mass concentration of 19% are mixed according to the solid-liquid ratio of 1:5 for preparation.
The mass of the fourth step is WaThe process of gold mineral leaching of a set of parallel samples is as follows: to a mass of WaAdding iodine-potassium iodide gold leaching agent into the parallel samples, heating and stirring at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
The mass in the step five is WbThe process of removing the gold-robbing substances by roasting the other group of parallel samples comprises the following steps: the mass is WbThe parallel samples are placed in a muffle furnace at 450 ℃ for roasting for 2 hours; gold leaching after roastingThe process is as follows: adding iodine-potassium iodide gold leaching agent into the roasted sample, and heating and stirring the mixture at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
The invention has the beneficial effects that:
compared with the one-step leaching process which directly uses aqua regia to simultaneously remove metal minerals and gold minerals, the process flow which removes metal sulfides and metal oxides step by step and then uses the iodine-potassium iodide gold leaching agent to leach gold is adopted in the invention, and tests prove that the gold minerals treated by the step method are more thoroughly leached, the intermediate interference factors are less, the drug effect is more stable, and the obtained data is more accurate.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
Referring to fig. 1, the method for determining gold and silicate-coated gold influenced by gold-robbing substances in gold ore products of the present invention comprises the following steps:
step one, obtaining a gold ore product
The raw ore is a gold ore containing gold-robbing substances which affect gold, wherein the gold-robbing substances are organic carbon substances generally.
Selecting gold ore containing gold-robbing substances affecting gold as raw ore, grinding the raw ore to prepare a gold ore product with required fineness, preparing the gold ore product into a uniformly dried gold ore product, analyzing the gold grade J in the gold ore product, and simultaneously taking a test sample with the mass of W from the gold ore product;
and step two, removing the metal sulfide from the test sample with the mass W. Simultaneously, carbonate minerals are removed.
Adding a strong oxidant, namely nitric acid with the mass concentration of 68% as an extracting agent into a test sample with the mass of W, removing metal sulfides in the sample by using the strong oxidant, wherein the solid-to-liquid ratio of the test sample to the extracting agent is 1:4, heating in a water bath at 50-70 ℃, shaking or stirring for 3 hours, washing and filtering the precipitate, pouring out the filtrate, and taking the filter residue;
and step three, removing the metal oxide from the filter residue product after removing the sulfide and the carbonate.
Adding 9.5% by mass of dilute hydrochloric acid as an extracting agent into the filter residue obtained in the second step, wherein the solid-to-liquid ratio of the filter residue to the dilute hydrochloric acid is 1:4, dripping a reducing agent prepared from stannous chloride and 19% by mass of dilute hydrochloric acid into the filter residue by using a rubber head dropper to remove metal oxides, wherein the dripping amount is 0.5 drops/g, heating the filter residue in a water bath at 50-70 ℃, simultaneously shaking or stirring the mixture for 2 hours to completely react, then washing and filtering the precipitate, pouring out the filtrate, and reserving the filter residue, wherein the filter residue is a product after removing the oxides;
step four, drying the product obtained in the step three after removing the oxide and recording the weight, wherein the quality of the dried product after removing the oxide is recorded as WabThen the mass is WabThe product of (A) was divided into two parallel samples, weighed separately and the mass was recorded as Wa、WbWherein W isa+Wb＝WabMass is WaLeaching the gold minerals by using a group of parallel samples, filtering to obtain filter residues after complete leaching, drying the leaching residues and recording the weight, wherein the quality of the dried leaching residues is recorded as W1aAnd analyzed by mass W1aGold grade J in the leaching residuea；
Step five, the mass is WbRemoving gold-robbing substances from the other group of parallel samples by a roasting method, obtaining a product which is completely reacted and has no influence of metal minerals, carbonate minerals and gold-robbing substances, leaching gold from the product, filtering to obtain leaching residue, drying the leaching residue, and recording the weight, wherein the quality of the dried leaching residue is recorded as W1bAnd analyzed by mass W1bGold grade J in the leaching residueb；
Calculating the relative content Q of the silicate-coated gold in the gold ore product and the relative content X of the gold in the gold ore product influenced by the gold-robbing substances according to the following formula:
Q＝(Jb/J)*(W1b/Wb)*(Wab/W)*100％；
X＝(Ja/J)*(W1a/Wa)*(Wab/W)*100％-Q。
the preparation method of the reducing agent in the third step comprises the following steps: the stannous chloride and the dilute hydrochloric acid with the mass concentration of 19% are mixed according to the solid-liquid ratio of 1:5 for preparation.
The mass of the fourth step is WaThe process of gold mineral leaching of a set of parallel samples is as follows: to a mass of WaAdding iodine-potassium iodide gold leaching agent into the parallel samples, heating and stirring at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
The mass in the step five is WbThe process of removing the gold-robbing substances by roasting the other group of parallel samples comprises the following steps: the mass is WbThe parallel sample is placed in a muffle furnace at 450 ℃ for roasting for 2 hours, oxygen is filled into the muffle furnace during roasting, and the process of leaching gold of the product which is obtained after roasting and is removed of the influence of metal minerals, carbonate minerals and gold-robbing substances is as follows: adding iodine-potassium iodide gold leaching agent into the roasted sample, and heating and stirring the mixture at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
The preparation method of the gold leaching agent-iodine-potassium iodide solution comprises the following steps: the gold leaching agent is prepared by mixing an iodine solution with the concentration of 70g/L, a potassium iodide solution with the concentration of 140g/L and distilled water, wherein the liquid-solid ratio of the gold leaching agent to a product needing gold leaching is 4: 1.
The method can accurately detect the specific values of gold influenced by the gold-robbing substance and the silicate-coated gold, the two factors are the adverse factors with the largest influence when the gold-robbing substance influences the recovery of gold minerals from gold ores, the influence of the two factors is clearly detected, the evaluation value of the gold recovered from the whole ore body and the maximum recovery and utilization of the gold minerals in a field process test are realized, and the process selection and the control direction have definite guiding significance, thereby being suitable for the green development requirement of the sustainable recovery and utilization of resources.
Claims (4)
1. The method for determining influence of gold-robbing substances in gold ore products on gold and silicate-coated gold is characterized by comprising the following steps of:
step one, selecting gold ore containing gold-robbing substances affecting gold as raw ore, grinding the raw ore to prepare a gold ore product with required fineness, analyzing the gold grade J in the gold ore product, and simultaneously taking a test sample with the mass W from the gold ore product;
step two, adding nitric acid with the mass concentration of 68% into a test sample with the mass of W as an extracting agent, wherein the solid-to-liquid ratio of the test sample to the extracting agent is 1:4, heating in a water bath at 50-70 ℃, shaking or stirring for 3 hours, washing and filtering the precipitate, pouring out the filtrate, and taking the filter residue;
adding 9.5% by mass of dilute hydrochloric acid serving as an extracting agent into the filter residue obtained in the second step, wherein the solid-to-liquid ratio of the filter residue to the dilute hydrochloric acid is 1:4, dripping a reducing agent prepared from stannous chloride and 19% by mass of dilute hydrochloric acid by using a rubber head dropper, wherein the dripping amount is 0.5 drops/g, heating in a water bath at 50-70 ℃, simultaneously shaking or stirring for 2 hours, washing and filtering the precipitate, pouring out the filtrate, and taking the filter residue which is a product after removing oxides;
step four, drying the product obtained in the step three after removing the oxide and recording the weight, wherein the quality of the dried product after removing the oxide is recorded as WabThen the mass is WabThe product of (A) was divided into two parallel samples, weighed separately and the mass was recorded as Wa、WbMass is WaLeaching the gold minerals by using a group of parallel samples, filtering to obtain filter residues after complete leaching, drying the leaching residues and recording the weight, wherein the quality of the dried leaching residues is recorded as W1aAnd analyzed by mass W1aGold grade J in the leaching residuea；
Step five, the mass is WbRemoving gold-robbing substances from the other group of parallel samples by a roasting method, leaching gold, filtering to obtain leaching residue after gold leaching is completed, drying the leaching residue, and recording the weight, wherein the quality of the dried leaching residue is recorded as W1bAnd analyzed by mass W1bGold grade J in the leaching residueb；
Calculating the relative content Q of the silicate-coated gold in the gold ore product and the relative content X of the gold in the gold ore product influenced by the gold-robbing substances according to the following formula:
Q＝(Jb/J)*(W1b/Wb)*(Wab/W)*100％；
X＝(Ja/J)*(W1a/Wa)*(Wab/W)*100％-Q。
2. the method for determining influence of gold-robbing substances in gold ore products on gold and silicate-coated gold according to claim 1, wherein the method for preparing the reducing agent in the third step comprises: the stannous chloride and the dilute hydrochloric acid with the mass concentration of 19% are mixed according to the solid-liquid ratio of 1:5 for preparation.
3. The method for determining influence of gold-robbing substances on gold and silicate-coated gold in gold ore product according to claim 2, wherein the mass in the fourth step is WaThe process of gold mineral leaching of a set of parallel samples is as follows: to a mass of WaAdding iodine-potassium iodide gold leaching agent into the parallel samples, heating and stirring at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
4. The method according to claim 3, wherein the influence of gold-robbing substances in gold ore products on gold and silicate-coated gold is determined in step five by mass WbThe process of removing the gold-robbing substances by roasting the other group of parallel samples comprises the following steps: the mass is WbThe parallel samples are placed in a muffle furnace at 450 ℃ for roasting for 2 hours; the gold leaching process after roasting is as follows: adding iodine-potassium iodide gold leaching agent into the roasted sample, and heating and stirring the mixture at 70 ℃ for reaction for 3h to obtain leaching residue for completely leaching gold.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB377705A (en) * | 1930-10-08 | 1932-07-25 | Meyer Mineral Separation Compa | Improvements in or relating to processes for recovering metal values from ores and other metalliferous materials |
| CN86107005A (en) * | 1985-09-23 | 1987-09-02 | 埃伯哈德·格克 | From concentrate, reclaim the method for precious metal |
| CA2908370A1 (en) * | 2013-03-29 | 2014-10-02 | Jx Nippon Mining & Metals Corporation | Method of recovering gold from gold ores containing pyrite |
| CN109632976A (en) * | 2018-12-29 | 2019-04-16 | 紫金矿业集团股份有限公司 | Golden diagnostic method in gold mine pressure pre-oxidation cyanide residue |
| CN111579338A (en) * | 2020-06-28 | 2020-08-25 | 长春黄金研究院有限公司 | Method for measuring gold in secondary utilization waste |
-
2020
- 2020-10-15 CN CN202011099835.9A patent/CN112284959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB377705A (en) * | 1930-10-08 | 1932-07-25 | Meyer Mineral Separation Compa | Improvements in or relating to processes for recovering metal values from ores and other metalliferous materials |
| CN86107005A (en) * | 1985-09-23 | 1987-09-02 | 埃伯哈德·格克 | From concentrate, reclaim the method for precious metal |
| CA2908370A1 (en) * | 2013-03-29 | 2014-10-02 | Jx Nippon Mining & Metals Corporation | Method of recovering gold from gold ores containing pyrite |
| CN109632976A (en) * | 2018-12-29 | 2019-04-16 | 紫金矿业集团股份有限公司 | Golden diagnostic method in gold mine pressure pre-oxidation cyanide residue |
| CN111579338A (en) * | 2020-06-28 | 2020-08-25 | 长春黄金研究院有限公司 | Method for measuring gold in secondary utilization waste |
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| Title |
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| 伍三民等: "板其金矿金的赋存状态研究", 《铀矿冶》 * |
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Application publication date: 20210129 |