CN113262883A - Flotation method for improving grade of high-sulfur gold concentrate - Google Patents

Flotation method for improving grade of high-sulfur gold concentrate Download PDF

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Publication number
CN113262883A
CN113262883A CN202011160988.XA CN202011160988A CN113262883A CN 113262883 A CN113262883 A CN 113262883A CN 202011160988 A CN202011160988 A CN 202011160988A CN 113262883 A CN113262883 A CN 113262883A
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gold
scavenging
concentrate
sulfur
ball mill
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Inventor
潘仁球
白成庆
颜顺德
姚凯
欧也斐
唐能斌
田茂兵
罗远波
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HUNAN SHUIKOUSHAN NONFERROUS METALS GROUP CO Ltd
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HUNAN SHUIKOUSHAN NONFERROUS METALS GROUP CO Ltd
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Priority to CN202011160988.XA priority Critical patent/CN113262883A/en
Publication of CN113262883A publication Critical patent/CN113262883A/en
Priority to PCT/CN2021/126775 priority patent/WO2022089492A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/002—Inorganic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/004—Organic compounds
    • B03D1/01—Organic compounds containing nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/018—Mixtures of inorganic and organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/02—Collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/04—Frothers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/06—Depressants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B03D2203/025—Precious metal ores

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a flotation method for improving the grade of high-sulfur gold concentrate, which comprises the following steps: crushing high-sulfur gold raw ore, sequentially entering a first-stage ball mill, a first-stage spiral classifier, a hydrocyclone and an ore pulp stirring barrel, settling sand of the hydrocyclone, entering a second-stage ball mill, a second-stage spiral classifier and the ore pulp stirring barrel, adding diesel oil, pine oil and butylammonium into the stirring barrel, entering a gold roughing flotation tank, sequentially performing first gold sweeping, second gold sweeping and third gold sweeping, and sequentially performing first gold refining and second gold refining on gold roughing concentrate to obtain a gold concentrate product. According to the invention, through ore grinding fineness control and medicament system improvement in high-sulfur gold ore dressing, the grade of gold concentrate is improved and the value of the gold concentrate is improved under the condition of less influence on gold recovery rate.

Description

Flotation method for improving grade of high-sulfur gold concentrate
Technical Field
The invention relates to the technical field of metallurgy, in particular to a flotation method for improving the grade of high-sulfur gold concentrate.
Background
In the gold dressing industry, the improvement of the gold dressing recovery rate is the most direct way for improving the gold value, but because the valuation coefficient of gold in gold concentrate is closely related to the gold grade, the higher the gold grade is, the higher the valuation coefficient is, and the higher the gold value is, the higher the gold value is. In the beneficiation process, the improvement of the grade of gold concentrate often causes the reduction of the gold recovery rate, so that the contradiction between the gold grade and the recovery rate is formed, and the contradiction is more prominent particularly in the beneficiation process of high-sulfur gold ores. How to improve the grade of gold concentrate under the condition of less influence of gold recovery rate is a common problem in the ore dressing industry.
In general, copper sulfate activation and ammonium butyrate and xanthate collectors are combined for gold capture. However, in the beneficiation process of the high-sulfur gold ore, copper sulfate also has an activating effect on pyrite while activating gold, and single butylammonium has limited collecting capacity on gold, so that after the copper sulfate is combined with a xanthate collecting agent, because the xanthate collecting agent has strong collecting capacity on the pyrite, although the collecting capacity of the combined collecting agent is enhanced, the selectivity is deteriorated, the gold recovery rate is improved when the agent system is used for floating the high-sulfur gold ore, the gold concentrate grade is lower, the gold valuation coefficient is low, and the gold concentrate value is low.
Disclosure of Invention
The invention aims to provide a flotation method for improving the grade of high-sulfur gold concentrate, which improves the grade of the gold concentrate and the value of the gold concentrate under the condition of less influence on gold recovery rate by controlling ore grinding fineness and improving a medicament system in the high-sulfur gold ore dressing.
The technical scheme of the invention is realized as follows:
the invention provides a flotation method for improving the grade of high-sulfur gold concentrate, which comprises the following steps: crushing high-sulfur gold raw ore, sequentially entering a first-stage ball mill, a first-stage spiral classifier, a hydrocyclone and an ore pulp stirring barrel, settling sand of the hydrocyclone, entering a second-stage ball mill, a second-stage spiral classifier and the ore pulp stirring barrel, adding diesel oil, pine oil and butylammonium into the stirring barrel, entering a gold roughing flotation tank, sequentially performing first gold sweeping, second gold sweeping and third gold sweeping, and sequentially performing first gold refining and second gold refining on gold roughing concentrate to obtain a gold concentrate product.
As a further improvement of the invention, the method specifically comprises the following steps: crushing the high-sulfur gold raw ore to 1-14mm by a crushing process, feeding the crushed high-sulfur gold raw ore into a first-stage ball mill, adding sodium sulfide into the inlet of the first-stage ball mill, enabling the overflow of the first-stage ball mill to enter a first-stage spiral classifier, enabling return sand of the spiral classifier to return to the first-stage ball mill, enabling the overflow of the spiral classifier to enter a hydrocyclone, enabling the overflow of the hydrocyclone to enter a pulp stirring barrel, enabling settled sand of the hydrocyclone to enter a second-stage ball mill, enabling the overflow of the second-stage ball mill to enter a second-stage spiral classifier, enabling the return sand of the classifier to return to the second-stage ball mill, enabling the overflow of the classifier to enter the pulp stirring barrel, adding diesel oil, terpineol oil and ammonium butyrate into the pulp stirring barrel, enabling the pulp in the stirring barrel to enter a gold roughing flotation tank, sequentially carrying out first gold scavenging, second scavenging and third gold scavenging, and sequentially carrying out first gold scavenging and second gold scavenging on the gold roughing concentrate to obtain a gold concentrate product.
As a further improvement of the method, the concentrate obtained by the gold roughing enters a first gold-dressing flotation tank, and the gold roughing tailings enter a first gold-scavenging flotation tank.
As a further improvement of the invention, 10-30g/t of butylammonium is added into the first gold scavenging tank, the concentrate obtained by the first gold scavenging is returned to the gold roughing tank, and the first gold scavenging concentrate tailings enter the second gold scavenging flotation tank.
As a further improvement of the invention, the concentrate obtained by the second gold scavenging returns to the first gold scavenging flotation tank, and the second gold scavenging tailings enter the third gold scavenging flotation tank.
As a further improvement of the invention, the concentrate obtained by the third gold scavenging returns to the second gold scavenging flotation tank, and the third gold scavenging tailings enter the ore pulp stirring barrel before the sulfur-selecting operation.
As a further improvement of the invention, the first gold concentration tailings are returned to the gold roughing flotation tank, and the concentrate obtained by the first gold concentration enters the second gold concentration flotation tank.
As a further improvement of the invention, the second gold concentration tailings are returned to the first gold concentration flotation tank, and the concentrate obtained by the second gold concentration is a gold concentrate product.
As a further improvement of the invention, 50-90g/t of diesel oil, 20-50g/t of pine oil and 5-25g/t of butylammonium are added into the ore pulp stirring barrel.
As a further improvement of the invention, the addition amount of the sodium sulfide at the inlet of the first-stage ball mill is 500-700g/t, and the addition amount of the sodium sulfide at the inlet of the first-stage ball mill is 600 g/t.
The invention has the following beneficial effects: the invention adopts two-stage ore grinding process to ensure that the fineness of the ore pulp entering the ore pulp stirring barrel reaches-74 um and accounts for 88 percent, so that gold minerals are fully dissociated, and a combined reagent system which adopts sodium sulfide to inhibit pyrite, pine oil from bubbling, diesel oil as a main part and ammonium butyrate as an auxiliary part is adopted. The method has the advantages that a proper amount of sodium sulfide can inhibit pyrite and can also activate partially oxidized gold minerals, improvement of grade and recovery rate of gold concentrate is facilitated, diesel oil is used as a main collecting agent, the collecting capacity of the diesel oil on the pyrite is weak, gold can be well collected, the terpineol oil only has foamability, the defect that the foaming capacity of the diesel oil and the ammonium butyrate is insufficient can be overcome, the collecting capacity of the gold can be enhanced by a small amount of ammonium butyrate, and floating of a large amount of pyrite is avoided. The combined reagent system used by the invention meets the requirements of sulfur suppression and gold separation, and can improve the grade of the gold concentrate from 15g/t to 100g/t under the condition of less influence on the gold recovery rate, thereby improving the value of the gold concentrate.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a process flow diagram of the flotation method for improving the grade of high-sulfur gold concentrate according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to the attached figure 1, crushing high-sulfur gold raw ore by a crushing process to 1-14mm, feeding the crushed high-sulfur gold raw ore into a first-stage ball mill, adding sodium sulfide into the inlet of the first-stage ball mill, overflowing the first-stage ball mill into a first-stage spiral classifier, returning sand returned by the spiral classifier to the first-stage ball mill, overflowing the spiral classifier into a hydrocyclone, overflowing the hydrocyclone into an ore pulp stirring barrel, settling sand by the hydrocyclone into a second-stage ball mill, overflowing the second-stage ball mill into a second-stage spiral classifier, returning sand returned by the classifier into the second-stage ball mill, overflowing the classifier into the ore pulp stirring barrel, adding diesel oil, pine oil and ammonium into the ore pulp stirring barrel, feeding the ore pulp in the stirring barrel into a gold roughing flotation tank, feeding the concentrate obtained by gold roughing into a first gold roughing flotation tank, feeding the gold roughing tailings into a first gold scavenging flotation tank, returning the concentrate obtained by the first gold scavenging to the roughing tank, and the first gold scavenging fine tailings enter a second gold scavenging flotation tank to be subjected to second gold scavenging, the concentrate obtained by the second gold scavenging returns to the first gold scavenging flotation tank, the second gold scavenging tailings enter a third gold scavenging flotation tank to be subjected to third gold scavenging, the concentrate obtained by the third gold scavenging returns to the second gold scavenging flotation tank, the third gold scavenging tailings enter an ore pulp stirring barrel before sulfur concentration operation, the concentrate obtained by gold roughing enters the first gold refining flotation tank, the first gold refining tailings return to the gold roughing flotation tank, the concentrate obtained by the first gold refining enters the second gold refining flotation tank, the second gold refining tailings return to the first gold refining flotation tank, and the concentrate obtained by the second gold refining is a gold concentrate product.
And adding 10g/t of butylammonium into the first gold scavenging tank.
50g/t of diesel oil, 20g/t of pine oil and 5g/t of butylammonium are added into the ore pulp stirring barrel.
The addition amount of sodium sulfide at the inlet of the first-stage ball mill is 500 g/t.
Example 2
Referring to the attached figure 1, crushing high-sulfur gold raw ore by a crushing process to 1-14mm, feeding the crushed high-sulfur gold raw ore into a first-stage ball mill, adding sodium sulfide into the inlet of the first-stage ball mill, overflowing the first-stage ball mill into a first-stage spiral classifier, returning sand returned by the spiral classifier to the first-stage ball mill, overflowing the spiral classifier into a hydrocyclone, overflowing the hydrocyclone into an ore pulp stirring barrel, settling sand by the hydrocyclone into a second-stage ball mill, overflowing the second-stage ball mill into a second-stage spiral classifier, returning sand returned by the classifier into the second-stage ball mill, overflowing the classifier into the ore pulp stirring barrel, adding diesel oil, pine oil and ammonium into the ore pulp stirring barrel, feeding the ore pulp in the stirring barrel into a gold roughing flotation tank, feeding the concentrate obtained by gold roughing into a first gold roughing flotation tank, feeding the gold roughing tailings into a first gold scavenging flotation tank, returning the concentrate obtained by the first gold scavenging to the roughing tank, and the first gold scavenging fine tailings enter a second gold scavenging flotation tank to be subjected to second gold scavenging, the concentrate obtained by the second gold scavenging returns to the first gold scavenging flotation tank, the second gold scavenging tailings enter a third gold scavenging flotation tank to be subjected to third gold scavenging, the concentrate obtained by the third gold scavenging returns to the second gold scavenging flotation tank, the third gold scavenging tailings enter an ore pulp stirring barrel before sulfur concentration operation, the concentrate obtained by gold roughing enters the first gold refining flotation tank, the first gold refining tailings return to the gold roughing flotation tank, the concentrate obtained by the first gold refining enters the second gold refining flotation tank, the second gold refining tailings return to the first gold refining flotation tank, and the concentrate obtained by the second gold refining is a gold concentrate product.
And adding 30g/t of butylammonium into the first gold scavenging tank.
90g/t of diesel oil, 50g/t of pine oil and 25g/t of butylammonium are added into the ore pulp stirring barrel.
The addition amount of sodium sulfide at the inlet of the first-stage ball mill is 700 g/t.
Example 3
Referring to the attached figure 1, crushing high-sulfur gold raw ore by a crushing process to 1-14mm, feeding the crushed high-sulfur gold raw ore into a first-stage ball mill, adding sodium sulfide into the inlet of the first-stage ball mill, overflowing the first-stage ball mill into a first-stage spiral classifier, returning sand returned by the spiral classifier to the first-stage ball mill, overflowing the spiral classifier into a hydrocyclone, overflowing the hydrocyclone into an ore pulp stirring barrel, settling sand by the hydrocyclone into a second-stage ball mill, overflowing the second-stage ball mill into a second-stage spiral classifier, returning sand returned by the classifier into the second-stage ball mill, overflowing the classifier into the ore pulp stirring barrel, adding diesel oil, pine oil and ammonium into the ore pulp stirring barrel, feeding the ore pulp in the stirring barrel into a gold roughing flotation tank, feeding the concentrate obtained by gold roughing into a first gold roughing flotation tank, feeding the gold roughing tailings into a first gold scavenging flotation tank, returning the concentrate obtained by the first gold scavenging to the roughing tank, and the first gold scavenging fine tailings enter a second gold scavenging flotation tank to be subjected to second gold scavenging, the concentrate obtained by the second gold scavenging returns to the first gold scavenging flotation tank, the second gold scavenging tailings enter a third gold scavenging flotation tank to be subjected to third gold scavenging, the concentrate obtained by the third gold scavenging returns to the second gold scavenging flotation tank, the third gold scavenging tailings enter an ore pulp stirring barrel before sulfur concentration operation, the concentrate obtained by gold roughing enters the first gold refining flotation tank, the first gold refining tailings return to the gold roughing flotation tank, the concentrate obtained by the first gold refining enters the second gold refining flotation tank, the second gold refining tailings return to the first gold refining flotation tank, and the concentrate obtained by the second gold refining is a gold concentrate product.
20g/t of butylammonium is added into the first gold scavenging groove.
75g/t of diesel oil, 35g/t of pine oil and 15g/t of butylammonium are added into the ore pulp stirring barrel.
The addition amount of sodium sulfide at the inlet of the first-stage ball mill is 600 g/t.
Compared with the prior art, the invention adopts a two-stage ore grinding process to ensure that the fineness of the ore pulp entering the ore pulp stirring barrel reaches-74 um and accounts for 88 percent, so that gold minerals are fully dissociated, and a combined reagent system which adopts sodium sulfide to inhibit pyrite, pine oil to foam, diesel oil as a main component and ammonium butyrate as an auxiliary component is adopted. The method has the advantages that a proper amount of sodium sulfide can inhibit pyrite and can also activate partially oxidized gold minerals, improvement of grade and recovery rate of gold concentrate is facilitated, diesel oil is used as a main collecting agent, the collecting capacity of the diesel oil on the pyrite is weak, gold can be well collected, the terpineol oil only has foamability, the defect that the foaming capacity of the diesel oil and the ammonium butyrate is insufficient can be overcome, the collecting capacity of the gold can be enhanced by a small amount of ammonium butyrate, and floating of a large amount of pyrite is avoided. The combined reagent system used by the invention meets the requirements of sulfur suppression and gold separation, and can improve the grade of the gold concentrate from 15g/t to 100g/t under the condition of less influence on the gold recovery rate, thereby improving the value of the gold concentrate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A flotation method for improving the grade of high-sulfur gold concentrate is characterized by comprising the following steps: crushing high-sulfur gold raw ore, sequentially entering a first-stage ball mill, a first-stage spiral classifier, a hydrocyclone and an ore pulp stirring barrel, settling sand of the hydrocyclone, entering a second-stage ball mill, a second-stage spiral classifier and the ore pulp stirring barrel, adding diesel oil, pine oil and butylammonium into the stirring barrel, entering a gold roughing flotation tank, sequentially performing first gold sweeping, second gold sweeping and third gold sweeping, and sequentially performing first gold refining and second gold refining on gold roughing concentrate to obtain a gold concentrate product.
2. A flotation method for upgrading high-sulfur gold concentrates according to claim 1, characterized in that it comprises the following steps: crushing the high-sulfur gold raw ore to 1-14mm by a crushing process, feeding the crushed high-sulfur gold raw ore into a first-stage ball mill, adding sodium sulfide into the inlet of the first-stage ball mill, enabling the overflow of the first-stage ball mill to enter a first-stage spiral classifier, enabling return sand of the spiral classifier to return to the first-stage ball mill, enabling the overflow of the spiral classifier to enter a hydrocyclone, enabling the overflow of the hydrocyclone to enter a pulp stirring barrel, enabling settled sand of the hydrocyclone to enter a second-stage ball mill, enabling the overflow of the second-stage ball mill to enter a second-stage spiral classifier, enabling the return sand of the classifier to return to the second-stage ball mill, enabling the overflow of the classifier to enter the pulp stirring barrel, adding diesel oil, terpineol oil and ammonium butyrate into the pulp stirring barrel, enabling the pulp in the stirring barrel to enter a gold roughing flotation tank, sequentially carrying out first gold scavenging, second scavenging and third gold scavenging, and sequentially carrying out first gold scavenging and second gold scavenging on the gold roughing concentrate to obtain a gold concentrate product.
3. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein the concentrate obtained by the gold rougher flotation is fed into a first gold rougher flotation tank, and the gold rougher tailings are fed into a first gold scavenger flotation tank.
4. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein 10-30g/t of butyl ammonium is added into the first gold scavenging tank, the concentrate obtained by the first gold scavenging is returned to the gold roughing tank, and the first gold scavenging concentrate tailings enter the second gold scavenging flotation tank.
5. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein the concentrate obtained by the second gold scavenging is returned to the first gold scavenging flotation tank, and the second gold scavenging tailings are fed to the third gold scavenging flotation tank.
6. A flotation method for improving the grade of high-sulfur gold concentrate according to claim 2, characterized in that the concentrate obtained by the third scavenging is returned to the second scavenging flotation tank, and the third scavenged tailings are fed into a pulp stirring barrel before sulfur separation.
7. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein the first gold concentration tailings are returned to a gold roughing flotation tank, and the concentrate obtained by the first gold concentration is fed to a second gold concentration flotation tank.
8. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein the second gold concentration tailings are returned to the first gold concentration flotation tank, and the concentrate obtained by the second gold concentration is a gold concentrate product.
9. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein 50-90g/t of diesel oil, 20-50g/t of pine oil and 5-25g/t of butylammonium are added into the ore pulp stirring barrel.
10. The flotation method for improving the grade of the high-sulfur gold concentrate according to claim 2, wherein the addition amount of the sodium sulfide at the inlet of the first-stage ball mill is 500-700g/t, and the addition amount of the sodium sulfide at the inlet of the first-stage ball mill is 600 g/t.
CN202011160988.XA 2020-10-27 2020-10-27 Flotation method for improving grade of high-sulfur gold concentrate Pending CN113262883A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022089492A1 (en) * 2020-10-27 2022-05-05 水口山有色金属有限责任公司 Flotation method for improving grade of high-sulfur gold concentrate

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Publication number Priority date Publication date Assignee Title
CN115055278B (en) * 2022-05-25 2023-11-14 西北矿冶研究院 Mineral separation method for comprehensively recovering copper and associated metal from mixed slag

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