CN112452551A - Flotation method for recovering copper from zinc oxide slag - Google Patents
Flotation method for recovering copper from zinc oxide slag Download PDFInfo
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- CN112452551A CN112452551A CN201910845126.1A CN201910845126A CN112452551A CN 112452551 A CN112452551 A CN 112452551A CN 201910845126 A CN201910845126 A CN 201910845126A CN 112452551 A CN112452551 A CN 112452551A
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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
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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
- 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
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
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Abstract
The invention discloses a flotation method for recovering copper from zinc oxide slag, which comprises the following steps of S1, carrying out ore sample detection on the zinc oxide slag, firstly naturally drying coarsely crushed slag, inspecting and screening the slag through a 2mm sieve, finely crushing products on the sieve through a pair of rollers, crushing all ores to be less than 2mm, finally uniformly mixing the ores by adopting a stacking method, uniformly sampling, and packaging in bags, wherein each bag is 300 g. According to the invention, copper is extracted from zinc oxide slag, the copper in the zinc oxide slag is pre-recovered by adopting a shaking table, the copper recovery in the zinc oxide slag can be realized by combining a flotation method and the shaking table, when the ore feeding copper grade is 2.6%, the copper concentrate grade can reach 17.32%, the recovery rate can reach 84.82%, for the zinc oxide slag with different properties and lower copper grade, the copper ratio is difficult to float, the copper concentrate recovery rate can be obviously improved by adding sodium sulfide, and impurities can be effectively removed by adding a novel organic inhibitor GZT, so that the copper concentrate grade is improved.
Description
Technical Field
The invention relates to the technical field of copper recovery, in particular to a flotation method for recovering copper from zinc oxide slag.
Background
At present, the contradiction between the large-scale demand of mineral resources and the increasing exhaustion and scarcity of mineral resources is increasingly sharp. It has therefore become common knowledge to exploit solid waste (secondary resources). Effectively recovering valuable components in the slag, and having important economic value and social significance. The method for recovering copper from slag includes fire method, wet method and ore dressing, among which ore dressing is the most economical and effective method for low-grade copper slag.
The zinc slag generated by the zinc oxide powder is essentially different from the copper slag in the slag properties and copper phases, and the copper in the zinc oxide slag has almost no copper sulfide and exists in the form of copper oxide. The existing beneficiation method for recovering the copper in the zinc oxide slag has low efficiency, and the copper can not be effectively recovered.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a flotation method for recovering copper from zinc oxide slag.
The invention provides a flotation method for recovering copper from zinc oxide slag, which comprises the following steps:
s1: carrying out ore sample detection on the zinc oxide slag: firstly, naturally airing coarsely crushed slag, inspecting and screening the slag by a 2mm sieve, finely crushing screened products by a double-roller machine, crushing all ores to be less than 2mm, uniformly mixing the ores by a stacking method, uniformly sampling, and packaging the ores in bags with 300g per bag;
s2: pre-shaking table screening: under the condition that the ore grinding concentration is 75%, because copper phase grains in the slag are fine and are intergrowth with other slag phase components, the copper phase grains can be dissociated from the other slag phase components by fine grinding, the copper can be recovered to a certain extent by table selection, the enrichment ratio reaches 1.68, but the concentrate recovery rate is only 52.5%;
s3: selecting a flotation collector: according to the property of copper-containing slag and the related mineral dressing experience at home and abroad, the collecting agent for copper dressing generally adopts one or more of high-grade xanthate, low-grade xanthate and black powder, Z-200, xanthate or KM109 and the like;
s4: selecting a flotation regulator: in flotation of slag Na2S can be used as a flotation regulator, an activating agent and a proper amount of Na2S size mixing can improve the floating characteristics of metal copper and matte in the slag, and can also activate copper oxide, thereby being beneficial to improving the concentrate grade and the recovery rate;
s5: selecting a flotation inhibitor: GZT is an organic agent extracted from plant, and can effectively inhibit gangue minerals, and has no inhibiting effect on copper;
s6: the preferred flotation scheme is as follows: the flotation method can be used for recovering copper in the zinc oxide slag, when the feeding copper grade is 2.6%, the copper concentrate grade can reach 17.32%, the recovery rate reaches 84.82%, and for the zinc oxide slag with different properties and lower copper grade, the copper ratio is difficult to float; the recovery rate of copper concentrate can be obviously improved by adding sodium sulfide, impurities can be effectively removed by adding a novel organic inhibitor GZT, and the grade of the copper concentrate is improved;
s7: flotation: the ore is crushed and ground to separate various minerals into monomer particles, the particle size meets the requirement of a flotation process, a collecting agent, a regulator and an inhibitor are added into ore pulp after ore grinding and are stirred and blended to act with the mineral particles so as to expand the floatability difference among different mineral particles, the blended ore pulp is sent into a flotation tank, stirring and aeration are carried out, the ore particles in the ore pulp are contacted and collided with the bubbles, the ore particles with good floatability selectively adhere to the bubbles and are carried and lifted into a mineralized foam layer consisting of three phases of gas-liquid-solid, the mineralized foam layer is mechanically scraped or overflows from the surface of the ore pulp, then dehydration and drying are carried out to obtain a concentrate product, and the mineral particles such as gangue and the like which cannot float are discharged as a tailing product from the bottom of the flotation tank along with the ore pulp.
Preferably, the ore pre-shaking table screening in S2 has a content of-200 meshes reaching 77.5%, and the grinding time in the shaking table screening is optimally 7 min.
Preferably, the effect of selecting Z-200, butyl xanthate or Z-200 in KM109 as the flotation collector in S3 is the best, and Z-200 is used as the collector for copper flotation.
Preferably, GZT is used as an inhibitor in the flotation inhibitor selection in S5, the grade of copper concentrate is improved to 10.78%, the recovery rate reaches 55.90%, and the grade of tailings is reduced to 0.88%.
Preferably, in the S6, in the preferred flotation scheme, the zinc oxide slag has high silicon content and a high ore grinding difficulty, and is difficult to finely grind, the copper in the zinc oxide slag is recovered by using a table concentrator, the copper grade in the concentrate is only 5.28%, and the enrichment ratio can only reach 1.7, which indicates that the gravity separation method cannot effectively recover the copper in the zinc oxide slag.
The beneficial effects of the invention are as follows:
1. in the flotation method for recovering copper from zinc oxide slag, copper is extracted from the zinc oxide slag, because the zinc oxide slag has high silicon content and high ore grinding difficulty and is difficult to realize fine grinding, the copper in the zinc oxide slag is recovered by adopting a table concentrator, the copper grade in concentrate is only 5.28 percent, the enrichment ratio can only reach 1.7, the gravity separation method can not effectively realize the recovery of the copper in the zinc oxide slag, the copper recovery in the zinc oxide slag can be realized by combining the flotation method and the table concentrator, when the ore feeding copper grade is 2.6 percent, the copper concentrate grade can reach 17.32 percent, and the recovery rate reaches 84.82 percent;
2. in the flotation method for recovering copper from zinc oxide slag, for zinc oxide slag with different properties and lower copper grade, copper is difficult to float, the recovery rate of copper concentrate can be obviously improved by adding sodium sulfide, impurities can be effectively removed by adding a novel organic inhibitor GZT, and the grade of copper concentrate is improved.
Drawings
FIG. 1 is a flow chart of a flotation method for recovering copper from zinc oxide slag provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a flotation method for recovering copper from zinc oxide slag comprises the following steps:
s1: carrying out ore sample detection on the zinc oxide slag: firstly, naturally airing coarsely crushed slag, inspecting and screening the slag by a 2mm sieve, finely crushing screened products by a double-roller machine, crushing all ores to be less than 2mm, uniformly mixing the ores by a stacking method, uniformly sampling, and packaging the ores in bags with 300g per bag;
s2: pre-shaking table screening: under the condition that the ore grinding concentration is 75%, because copper phase grains in the slag are fine and are intergrowth with other slag phase components, the copper phase grains can be dissociated from the other slag phase components by fine grinding, the copper can be recovered to a certain extent by table selection, the enrichment ratio reaches 1.68, but the concentrate recovery rate is only 52.5%;
s3: selecting a flotation collector: according to the property of copper-containing slag and the related mineral dressing experience at home and abroad, the collecting agent for copper dressing generally adopts one or more of high-grade xanthate, low-grade xanthate and black powder, Z-200, xanthate or KM109 and the like;
s4: selecting a flotation regulator: in the flotation of the slag, Na2S can be used as a flotation regulator and an activator, and proper amount of Na2S size mixing can improve the floating characteristics of metal copper and matte in the slag, and can activate copper oxide at the same time, thereby being beneficial to improving the concentrate grade and the recovery rate;
s5: selecting a flotation inhibitor: GZT is an organic agent extracted from plant, and can effectively inhibit gangue minerals, and has no inhibiting effect on copper;
s6: the preferred flotation scheme is as follows: the flotation method can be used for recovering copper in the zinc oxide slag, when the feeding copper grade is 2.6%, the copper concentrate grade can reach 17.32%, the recovery rate reaches 84.82%, and for the zinc oxide slag with different properties and lower copper grade, the copper ratio is difficult to float; the recovery rate of copper concentrate can be obviously improved by adding sodium sulfide, impurities can be effectively removed by adding a novel organic inhibitor GZT, and the grade of the copper concentrate is improved;
s7: flotation: the ore is crushed and ground to separate various minerals into monomer particles, the particle size meets the requirement of a flotation process, a collecting agent, a regulator and an inhibitor are added into ore pulp after ore grinding and are stirred and blended to act with the mineral particles so as to expand the floatability difference among different mineral particles, the blended ore pulp is sent into a flotation tank, stirring and aeration are carried out, the ore particles in the ore pulp are contacted and collided with the bubbles, the ore particles with good floatability selectively adhere to the bubbles and are carried and lifted into a mineralized foam layer consisting of three phases of gas-liquid-solid, the mineralized foam layer is mechanically scraped or overflows from the surface of the ore pulp, then dehydration and drying are carried out to obtain a concentrate product, and the mineral particles such as gangue and the like which cannot float are discharged as a tailing product from the bottom of the flotation tank along with the ore pulp.
According to the property of copper-containing slag and the related mineral dressing experience at home and abroad, the collecting agent for copper flotation generally adopts high-grade and low-grade xanthate and black powder, and the Z-200 is found to have the best effect through the exploration test of collecting agents such as Z-200, xanthate, KM109 and the like, so that the Z-200 is adopted as the collecting agent for copper flotation. In the flotation of slag, Na2S can be used as a flotation regulator and an activating agent. Proper amount of Na2S for size mixing can improve the floating characteristic of metallic copper and matte in the slag and activate oxygenAnd the copper is dissolved, so that the concentrate grade and the recovery rate are improved. As can be seen from the multielement analysis, the SiO content in the sample is large2(43%) sodium silicate was therefore used as inhibitor. The test adopts one-time roughing, the medicament conditions are 6.67kg/t of sodium sulfide, 6.67kg/t of sodium silicate, Z-200150g/t and 40g/t of No. 2 oil, and the result shows that the good flotation index with the copper concentrate grade of 17.32 percent and the recovery rate of 84.82 percent can be obtained through one-time roughing. Thus, Z-200 can effectively recover the copper in the slag.
Because the raw material composition fluctuation of the smelting zinc oxide is large, the copper grade in the slag is changed, the slag with low copper grade (1.35%) is roughed, under the same medicament condition, the grade of the copper concentrate after one roughing is only 5.4%, and the recovery rate is only 25.47%.
When the feeding grade is low, the copper in the zinc oxide slag is difficult to float. When the influence of the medicament conditions is analyzed, the addition of sodium sulfide in the roughing possibly has a certain inhibiting effect on copper. The sodium sulfide plus scavenging test was therefore examined. Through one roughing and one scavenging, the medicament conditions are that the roughing comprises 3.3kg/t of sodium carbonate, 6.67kg/t of sodium silicate, Z-200180g/t and 20g/t of No. 2 oil; and the scavenging comprises 5kg/t of sodium sulfide, Z-20090g/t and 10g/t of No. 2 oil, and the comparison with the result of adding sodium sulfide in rough concentration shows that the grade of the copper concentrate is improved from 5.40 percent to 7.49 percent, and the recovery rate is improved from 27.02 percent to 69.80 percent. The scavenging and the addition of the sodium sulfide can obviously improve the recovery rate of the copper concentrate.
GZT is an organic agent extracted from plant, and can effectively inhibit gangue minerals, but has no inhibiting effect on copper. In order to further improve the grade and the recovery rate of copper, a novel organic reagent GZT is used as an inhibitor, and the influence of the novel organic reagent GZT on the copper flotation index is examined. The medicament conditions are 3.3kg/t of sodium carbonate, 180 GZT180g/t, Z-200180g/t and 50g/t of No. 2 oil. The result shows that the GZT is used as an inhibitor, the grade of the copper concentrate is improved to 10.78%, the recovery rate reaches 55.90%, and meanwhile, the grade of the tailings is reduced to 0.88%, which shows that the inhibition effect of GXT on the gangue is better.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A flotation method for recovering copper from zinc oxide slag is characterized by comprising the following steps:
s1: carrying out ore sample detection on the zinc oxide slag: firstly, naturally airing coarsely crushed slag, inspecting and screening the slag by a 2mm sieve, finely crushing screened products by a double-roller machine, crushing all ores to be less than 2mm, uniformly mixing the ores by a stacking method, uniformly sampling, and packaging the ores in bags with 300g per bag;
s2: pre-shaking table screening: under the condition that the ore grinding concentration is 75%, because copper phase grains in the slag are fine and are intergrowth with other slag phase components, the copper phase grains can be dissociated from the other slag phase components by fine grinding, the copper can be recovered to a certain extent by table selection, the enrichment ratio reaches 1.68, but the concentrate recovery rate is only 52.5%;
s3: selecting a flotation collector: according to the property of copper-containing slag and the related mineral dressing experience at home and abroad, the collecting agent for copper dressing generally adopts one or more of high-grade xanthate, low-grade xanthate and black powder, Z-200, xanthate or KM109 and the like;
s4: selecting a flotation regulator: in flotation of slag Na2S can be used as a flotation regulator, an activating agent and a proper amount of Na2S size mixing can improve the floating characteristics of metal copper and matte in the slag, and can also activate copper oxide, thereby being beneficial to improving the concentrate grade and the recovery rate;
s5: selecting a flotation inhibitor: GZT is an organic agent extracted from plant, and can effectively inhibit gangue minerals, and has no inhibiting effect on copper;
s6: the preferred flotation scheme is as follows: the flotation method can be used for recovering copper in the zinc oxide slag, when the feeding copper grade is 2.6%, the copper concentrate grade can reach 17.32%, the recovery rate reaches 84.82%, and for the zinc oxide slag with different properties and lower copper grade, the copper ratio is difficult to float; the recovery rate of copper concentrate can be obviously improved by adding sodium sulfide, impurities can be effectively removed by adding a novel organic inhibitor GZT, and the grade of the copper concentrate is improved;
s7: flotation: the ore is crushed and ground to separate various minerals into monomer particles, the particle size meets the requirement of a flotation process, a collecting agent, a regulator and an inhibitor are added into ore pulp after ore grinding and are stirred and blended to act with the mineral particles so as to expand the floatability difference among different mineral particles, the blended ore pulp is sent into a flotation tank, stirring and aeration are carried out, the ore particles in the ore pulp are contacted and collided with the bubbles, the ore particles with good floatability selectively adhere to the bubbles and are carried and lifted into a mineralized foam layer consisting of three phases of gas-liquid-solid, the mineralized foam layer is mechanically scraped or overflows from the surface of the ore pulp, then dehydration and drying are carried out to obtain a concentrate product, and the mineral particles such as gangue and the like which cannot float are discharged as a tailing product from the bottom of the flotation tank along with the ore pulp.
2. The flotation method for recovering copper from zinc oxide slag according to claim 1, wherein the ore screened by a pre-shaker in S2 has a content of-200 mesh reaching 77.5%, and the grinding time in the shaker screening is preferably 7 min.
3. The flotation method for recovering copper from zinc oxide slag according to claim 1, wherein the effect of selecting Z-200 as the flotation collector in S3, butyl xanthate or Z-200 in KM109 is the best, and Z-200 is used as the collector for copper flotation.
4. The flotation method for recovering copper from zinc oxide slag according to claim 1, wherein GZT is adopted as an inhibitor in the flotation inhibitor selection in S5, the grade of copper concentrate is improved to 10.78%, the recovery rate reaches 55.90%, and the grade of tailings is reduced to 0.88%.
5. The flotation method for recovering copper from zinc oxide slag according to claim 1, wherein the zinc oxide slag in the preferred flotation scheme in S6 has high silicon content and high ore grinding difficulty, and is difficult to finely grind, and the copper in the zinc oxide slag is recovered by using a table concentrator, the copper grade in the concentrate is only 5.28%, and the enrichment ratio can only reach 1.7, which indicates that the gravity separation method cannot effectively recover the copper in the zinc oxide slag.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428250A (en) * | 2008-12-08 | 2009-05-13 | 杭州建铜集团有限公司 | Copper-zinc separation beneficiation method |
| WO2011085445A1 (en) * | 2010-01-14 | 2011-07-21 | Teebee Holdings Pty Ltd | Flotation reagents |
| CN105435970A (en) * | 2015-12-28 | 2016-03-30 | 昆明理工大学 | Mineral processing process for recovering copper from copper smelting slag through flotation |
| CN109604048A (en) * | 2018-11-14 | 2019-04-12 | 铜陵有色金属集团股份有限公司 | The method of metallic copper, copper sulfide and iron mineral in substep recycling copper vessel slag |
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- 2019-09-08 CN CN201910845126.1A patent/CN112452551A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428250A (en) * | 2008-12-08 | 2009-05-13 | 杭州建铜集团有限公司 | Copper-zinc separation beneficiation method |
| WO2011085445A1 (en) * | 2010-01-14 | 2011-07-21 | Teebee Holdings Pty Ltd | Flotation reagents |
| CN105435970A (en) * | 2015-12-28 | 2016-03-30 | 昆明理工大学 | Mineral processing process for recovering copper from copper smelting slag through flotation |
| CN109604048A (en) * | 2018-11-14 | 2019-04-12 | 铜陵有色金属集团股份有限公司 | The method of metallic copper, copper sulfide and iron mineral in substep recycling copper vessel slag |
Non-Patent Citations (1)
| Title |
|---|
| 陈晔 等: "《从氧化锌渣中回收铜的浮选试验研究》", 《矿产保护与利用》 * |
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Application publication date: 20210309 |