CN110841796B - Process for recovering chalcopyrite and chalcocite from high-yellow-iron mineralized skatolite copper ore - Google Patents
Process for recovering chalcopyrite and chalcocite from high-yellow-iron mineralized skatolite copper ore Download PDFInfo
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Abstract
The invention discloses a process for recovering chalcopyrite and chalcocite with uneven embedded particle size from high-pyrite mineralized skarnite copper ore, which is characterized by comprising the steps of primary ore grinding, copper-sulfur mixed flotation, secondary ore grinding, copper-sulfur rapid flotation, three-stage ore grinding and copper-sulfur separation column type flotation for recovering micro-fine particle copper. The method adapts to the characteristics of uneven embedded particle sizes and different floatability of the chalcopyrite and the chalcocite, realizes the recovery of the ultra-fine embedded chalcopyrite and the chalcocite, avoids the adverse effect of a micro-fine particle pulp system on the flotation process, and realizes the high-efficiency sorting of the refractory high-iron copper ore.
Description
Technical Field
The invention belongs to the technical field of mineral engineering, and particularly relates to a process for recovering chalcopyrite and chalcocite with non-uniform embedded particle size from high-yellow-iron mineralized skarnite copper ore.
Background
Copper is widely used in various fields of human life and is a particularly important metal material in economic construction. Along with the continuous development of the resource of the easily selected copper ore, the resource of the easily selected copper is gradually exhausted, and the recycling of the resource of the difficultly selected copper is more and more emphasized by the ore dressing workers.
The copper minerals in the chalcopyrite silicalite type copper ore mainly comprise chalcopyrite, chalcocite, a small amount of cerulene blue, tennantite and the like, and the gangue minerals mainly comprise calcium-containing magnesium silicate minerals, mainly comprise tremolite, chlorite, serpentine, mica, kaolinite and the like. Part of the chalcopyrite and the chalcocite are often embedded in the pyrite in the form of micro-particles, so that the embedding particle size of the copper minerals is extremely uneven, the content of the pyrite is high, and if the copper minerals cannot be fully dissociated, the loss of the copper minerals is caused. The copper mineral monomer is dissociated, the grinding fineness is increased, so that gangue minerals such as kaolinite and the like are subjected to transitional argillization, and the fine mud covers the surface of coarse particles to deteriorate the selectivity of the flotation process, so that the grade of the copper mineral is influenced. At present, the treatment of the ore of the type in the mine mainly comprises two processes of preferentially selecting copper and copper-sulfur mixed separation, and then separating, wherein when the copper process is preferentially selected to inhibit pyrite, the intergrowth of copper minerals and pyrite is simultaneously inhibited to cause the loss of the copper minerals, and the process is only suitable for embedding the massive copper-containing pyrite with thicker granularity. In addition, with the increase of the grinding fineness, the defects of low dispersion degree, large size, high turbulence degree and the like of flotation bubbles in fine-grained minerals of the traditional flotation machine are amplified, and the conventional sulfur inhibitor often makes foams sticky, so that the copper mineral concentrate has low grade and is not suitable for the ore of dense symbiosis of the pyrite and the copper mineral.
Disclosure of Invention
The invention aims to provide a process for recovering chalcopyrite and chalcocite with uneven embedded particle size from high-yellow-iron mineralized skarnite copper ore.
The invention aims to realize the method, which comprises the steps of primary ore grinding, copper-sulfur mixed flotation, secondary ore grinding, copper-sulfur quick flotation, third ore grinding and copper-sulfur separation column type flotation for recovering micro-fine particle copper, and specifically comprises the following steps:
A. first-stage ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 50-55% to obtain a material a;
B. copper and sulfur mixed flotation: adding an activating agent into the material a to activate to obtain a material b, sequentially adding a collecting agent and a foaming agent into the material b, and performing mixed flotation to obtain a mixed concentrate c and tailings d;
C. secondary grinding: grinding the bulk concentrate c to obtain a material e, wherein the grinding fineness is-74 mu m and accounts for 70-75%;
D. copper and sulfur quick flotation: adding a sulfur inhibitor, a collecting agent and a foaming agent into the material e, and performing copper-sulfur rapid flotation to obtain copper concentrate f, middling g and middling h;
E. three-stage ore grinding: merging the middling g and the middling h, and grinding the middling g and the middling h to obtain a material i, wherein the grinding fineness is-15 mu m and is more than 95%;
F. and (3) carrying out column type flotation for recovering micro-fine copper by copper-sulfur separation: performing one-stage roughing, two-stage scavenging and two-stage concentration on the material i by using a flotation column to obtain a copper concentrate j and a sulfur concentrate k, wherein a dispersant and a sulfur inhibitor are added into the one-stage roughing, two-stage concentration; collecting agents are added in the first-stage rough separation and the second-stage scavenging.
The process for recovering the chalcopyrite and the chalcocite with uneven embedded granularity from the high-yellow-iron mineralized skarnite copper ore specifically comprises the following operations:
A. first-stage ore grinding: and carrying out primary grinding on the crushed copper ore, wherein the grinding fineness is-74 mu m and accounts for 50-55%.
B. Copper and sulfur mixed flotation: activating a ground ore product by a small amount of activating agent, sequentially adding a collecting agent and a foaming agent, performing two-stage rough concentration, combining two-stage rough concentration into mixed concentrate, sequentially adding the collecting agent and the foaming agent into tailings of the rough concentration to perform scavenging twice, returning foam of the first-stage scavenging to the first-stage rough concentration, performing second-stage scavenging on the first-stage scavenged tailings, returning foam of the second-stage scavenging to the first-stage scavenging, and taking the second-stage scavenged tailings as final tailings.
C. Secondary grinding: and D, performing secondary grinding on the bulk concentrate obtained in the step B, wherein the grinding fineness is-74 mu m and accounts for 70-75%.
D. Copper and sulfur separation and classification rapid flotation: and C, screening and grading the ore pulp ground in the step C, and performing a flotation process of one-stage roughing and two-stage concentration on the graded coarse fraction by using a flotation machine, wherein an inhibitor, a collecting agent and a foaming agent are added in the roughing, and the inhibitor is added in the two-stage concentration. The roughing foam enters first-stage concentration, the first-stage concentration foam enters second-stage concentration, the second-stage concentration foam is coarse copper concentrate, second-stage concentration tailings return to first-stage concentration, first-stage concentration tailings return to roughing, and the roughing tailings are middlings 1; the grading fine fraction adopts a flotation process of one-section roughing and one-section concentrating by adopting a flotation column, wherein an inhibitor, a collecting agent and a foaming agent are added in the roughing, and the inhibitor is added in the concentrating. And (4) performing concentration on the roughing foam, wherein the concentrating foam is fine-grained copper concentrate. The selected tailings are returned to the rough concentration, and the rough concentration tailings are middlings 2. And D, combining the coarse-grained copper concentrate and the fine-grained copper concentrate into copper concentrate 1.
E. Three-stage ore grinding: and D, merging the middling 1 and the middling 2 obtained in the step D for three-stage ore grinding, wherein the ore grinding fineness is-15 mu m and is more than 95%.
F. And (3) carrying out column type flotation for recovering micro-fine copper by copper-sulfur separation: and E, performing flotation process of one-section roughing, two-section scavenging and two-section concentrating on the ore pulp obtained by grinding in the step E by using a flotation column under the condition of low concentration, wherein a dispersing agent and a novel inhibitor are added in the roughing and the two-section concentrating, and a collecting agent is added in the roughing and the two-section scavenging. Roughing foam enters first-stage concentration, first-stage concentration foam enters second-stage concentration, second-stage concentration foam is copper concentrate 2, concentration tailings return step by step, roughing tailings enter first-stage scavenging, first-stage scavenging tailings enter second-stage scavenging, scavenging foam returns step by step, and second-stage scavenging tailings are sulfur concentrate.
Further, the process conditions of the copper-sulfur mixed flotation roughing 1 in the step B are that 200-500 g/ton of activating agent is added, stirring is carried out for 3-5 minutes, 80-100 g/ton of collecting agent and 40-60 g/ton of foaming agent are added, and stirring is carried out for 2-4 minutes; the process conditions of the copper-sulfur mixed flotation roughing 2 are that 40-50 g/ton of collecting agent is added, 20-30 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the copper-sulfur mixed flotation scavenging 1 are that 20-25 g/ton of collecting agent is added, 10-20 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the copper-sulfur mixed flotation scavenging 2 are that 10-12.5 g/ton of collecting agent is added, 5-10 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes.
Further, the size of the sieve classification in step D is 38 μm. The process conditions of the quick flotation and roughing of the copper-sulfur separation coarse fraction flotation machine are that 2000-3000 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 40-60 g/ton of collecting agent is added, 20-30 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the rapid flotation and concentration 1 of the copper-sulfur separation coarse fraction flotation machine are that 1000-1500 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 10-20 g/ton of collecting agent is added, 5-10 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the rapid flotation and concentration 2 of the copper-sulfur separation coarse fraction flotation machine are that 500-800 g/ton of sulfur inhibitor is added, and stirring is carried out for 3-5 minutes; the technological conditions of the rapid flotation roughing of the copper-sulfur separation fine-fraction flotation column include that 2000-3000 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 60-80 g/ton of collecting agent is added, 20-30 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the technological conditions for the rapid flotation and concentration of the copper-sulfur separation fine-fraction flotation column are that 1000-1500 g/ton of sulfur inhibitor is added, and stirring is carried out for 3-5 minutes.
Further, the roughing process conditions of the micro-fine particle copper recovered by the copper-sulfur separation column type flotation in the step F are that 100-150 g/ton of dispersing agent is added, stirring is carried out for 3-5 minutes, 3000-4000 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 30-50 g/ton of collecting agent is added, 20-30 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the technological conditions of scavenging 1 for recovering micro-fine particle copper by copper-sulfur separation column type flotation are that collecting agent is added for 15-25 g/ton, foaming agent is added for 10-20 g/ton, and stirring is carried out for 2-4 minutes; the process conditions of scavenging 2 for recovering micro-fine particle copper by copper-sulfur separation column type flotation are that 7.5-12.5 g/ton of collecting agent is added, 5-10 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the fine particle copper concentration 1 for the copper-sulfur separation column type flotation recovery include that 50-80 g/ton of dispersing agent is added, stirring is carried out for 3-5 minutes, 1500-2000 g/ton of sulfur inhibitor is added, stirring is carried out for 3-5 minutes, 10-15 g/ton of collecting agent is added, 5-10 g/ton of foaming agent is added, and stirring is carried out for 2-4 minutes; the process conditions of the fine particle copper concentration 2 of the copper-sulfur separation column type flotation recovery comprise that 30-50 g/ton of dispersing agent is added, stirring is carried out for 3-5 minutes, 600-1000 g/ton of sulfur inhibitor is added, and stirring is carried out for 3-5 minutes.
Further, the activator in step B is calcium oxide. The collecting agent is one or more of butyl xanthate, isoamyl xanthate and butylamine black powder. The foaming agent is terpineol oil or 24K.
Further, the sulfur inhibitor in step D is calcium oxide. The collecting agent is one or more of ethidium nitrate, ethidium xanthate and KMY-1. The blowing agent was 24K.
Further, the dispersant in the step F is sodium hexametaphosphate. The sulfur inhibitor is KMD-1. The collecting agent is one or more of butyl xanthate, ethyl xanthate and isoamyl xanthate. The blowing agent was 24K. The flotation concentration is 5-10%.
Furthermore, the sulfur inhibitor KMD-1 in the step F mainly comprises calcium oxide, sodium sulfide and sodium dithionate.
Further, the sulfur inhibitor KMD-1 in the step F mainly comprises 50-80% of calcium oxide, 10-20% of sodium sulfide and 20-30% of sodium dithionate.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, copper-sulfur mixed flotation is carried out after the first-stage coarse grinding, so that the copper recovery rate can be improved to the greatest extent, and the flotation process of transition argillization deterioration of magnesium-containing gangue minerals in ores is avoided.
2. After the two-stage grinding, most of the chalcopyrite and the chalcocite are dissociated with the pyrite, the copper mineral with high monomer dissociation degree is quickly floated, the fine-grained high-grade copper concentrate with high dissociation degree can be obtained by adopting the graded flotation and utilizing the advantages of the flotation column in the fine-grained mineral flotation, and meanwhile, the flotation efficiency of the flotation machine is improved, and the coarse-grained high-grade copper concentrate with high dissociation degree can be obtained.
3. The invention is suitable for quick flotation, and no scavenging operation is set for graded flotation, so that the selectivity of the copper mineral with high monomer dissociation degree and good floatability is higher, the flow is simplified, and the high quality of the copper concentrate is ensured.
4. The three-section superfine grinding is carried out and then the flotation column is adopted for separation, so that the device has the characteristics of larger mineralization area, high bubble dispersion degree, more micro bubbles, low turbulence degree, high enrichment ratio and the like, is more suitable for the flotation of micro-fine particle minerals, and can obtain copper concentrate with relatively higher grade.
5. The novel sulfur inhibitor KMD-1 is adopted in the three-stage superfine mill, so that mechanical entrainment caused by foam stickiness caused by large using amount of calcium oxide is avoided, and the grade of copper concentrate is improved.
6. The invention is more suitable for copper ores with uneven disseminated granularity and large floatability difference through stage grinding and stage flotation and grading quick flotation, and has stronger adaptability to the disseminated granularity and floatability change of the raw ores.
7. The reagents used in the invention are all conventional flotation reagents and are environment-friendly.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples and the accompanying drawings, but the present invention is not limited thereto in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
The invention relates to a process for recovering chalcopyrite and chalcocite with uneven embedded granularity from high-pyrite mineralized skarnite copper ore, which comprises the steps of primary ore grinding, copper-sulfur mixed flotation, secondary ore grinding, copper-sulfur quick flotation, three-stage ore grinding and copper-sulfur separation column type flotation for recovering micro-fine copper particles, and specifically comprises the following steps:
A. first-stage ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 50-55% to obtain a material a;
B. copper and sulfur mixed flotation: adding an activating agent into the material a to activate to obtain a material b, sequentially adding a collecting agent and a foaming agent into the material b, and performing mixed flotation to obtain a mixed concentrate c and tailings d;
C. secondary grinding: grinding the bulk concentrate c to obtain a material e, wherein the grinding fineness is-74 mu m and accounts for 70-75%;
D. copper and sulfur quick flotation: adding a sulfur inhibitor, a collecting agent and a foaming agent into the material e, and performing copper-sulfur rapid flotation to obtain copper concentrate f, middling g and middling h;
E. three-stage ore grinding: merging the middling g and the middling h, and grinding the middling g and the middling h to obtain a material i, wherein the grinding fineness is-15 mu m and is more than 95%;
F. and (3) carrying out column type flotation for recovering micro-fine copper by copper-sulfur separation: performing one-stage roughing, two-stage scavenging and two-stage concentration on the material i by using a flotation column to obtain a copper concentrate j and a sulfur concentrate k, wherein a dispersant and a sulfur inhibitor are added into the one-stage roughing, two-stage concentration; collecting agents are added in the first-stage rough separation and the second-stage scavenging.
And B, adding an activating agent into the material a to activate to obtain a material B, sequentially adding a collecting agent and a foaming agent into the material B, and performing two-section rough concentration to combine two sections of rough concentrate into a mixed concentrate c, sequentially adding the collecting agent and the foaming agent into the roughed tailings to perform scavenging twice, wherein the foam of one section of scavenging returns to the first section of rough concentration, the foam of one section of scavenging tailings performs two-section scavenging, the foam of the second section of scavenging returns to the first section of scavenging, and the second section of scavenging tailings is the final tailings d.
And the activating agent in the step B is calcium oxide, and the using amount is 200-500 g/t.
The collecting agent in the step B is one or more of butyl xanthate, isoamyl xanthate and butylamine black powder, and the using amount is 80-100 g/t; the foaming agent is terpineol oil or 24K, and the using amount is 40-60 g/t.
D, the copper-sulfur rapid flotation is to screen and grade the material e:
1) the classified coarse fraction is subjected to a flotation process of one-stage roughing and two-stage concentration by adopting a flotation machine, wherein a sulfur inhibitor, a collecting agent and a foaming agent are added in the roughing, and the sulfur inhibitor is added in the two-stage concentration; the roughing foam enters first-stage concentration, the first-stage concentration foam is immersed in second-stage concentration, and the second-stage concentration foam is coarse copper concentrate; returning the second-stage selected tailings to the first-stage selection, returning the first-stage selected tailings to the rough selection, wherein the rough selection tailings are middlings g;
2) carrying out a first-stage roughing and a first-stage concentrating check process on the fine grading fraction by adopting a flotation column, wherein a sulfur inhibitor, a collecting agent and a foaming agent are added in the roughing process, and the sulfur inhibitor is added in the concentrating process; the roughing foam enters the fine concentration, the fine foam is fine copper concentrate, the fine tailings return to the roughing, and the roughing tailings are middlings h;
3) combining the coarse copper concentrate of step 1) and the fine copper concentrate of step 2) to obtain copper concentrate f.
The screened and classified granularity is 38 mu m, and the size fraction larger than 38 mu m is classified coarse fraction, namely, a flotation machine is adopted to carry out one-stage rough concentration and two-stage fine concentration; the particle size less than 3838 μm is classified into fine particle size, that is, a flotation column is used for one-stage rough concentration and one-stage fine concentration.
The process for recovering the chalcopyrite and the chalcocite with uneven embedded particle size from the high-yellow mineralized skarn copper ore comprises the following steps:
1) the sulfur inhibitor is calcium oxide, and the dosage of a flotation machine and a flotation column in the rough concentration is 2000-3000 g/t; the using amount of a flotation machine and a flotation column in the first-stage concentration is 1000-1500 g/t; the using amount of a flotation machine in the two-stage fine selection is 500-800 g/t, and no flotation column is added;
2) the collecting agent is one or more of ethidium, ethidium bromide and KMY-1, and the amount of a flotation machine in the roughing is 40-60 g/t; the using amount of the flotation column is 60-80 g/t; the using amount of a flotation machine in the first-stage fine selection is 10-20 g/t, and no flotation column is added; second-stage selection is not added;
3) the foaming agent is 24k, and the using amounts of a flotation machine and a flotation column in the rough concentration are both 20-30 g/t; the first-stage concentration and the second-stage concentration are not added.
F, performing flotation to recover the micro-fine copper particles by using the copper-sulfur separation column, namely performing one-section roughing and two-section scavenging and two-section concentration operation on the material i by using a flotation column under the condition of low concentration, wherein a dispersing agent and a sulfur inhibitor are added in the roughing and the two-section concentration; adding a collecting agent in rough concentration and two-stage scavenging; immersing roughing foam into first-stage concentration, immersing first-stage concentration foam into second-stage concentration, wherein the second-stage concentration foam is copper concentrate j; the selected tailings are returned step by step, the roughed tailings enter first-stage scavenging, the first-stage scavenging tailings enter second-stage scavenging, scavenging foam is returned step by step, and the second-stage scavenging tailings are sulfur concentrate k.
The method for recovering the micro-fine copper particles by the copper-sulfur separation column flotation is characterized in that a flotation column is adopted for carrying out one-stage roughing, two-stage scavenging and two-stage fine selection operation to recover the micro-fine copper particles with the particle size of more than 95 percent and the particle size of-15 microns, the roughing flotation concentration is 5-10 percent, a dispersing agent is sodium hexametaphosphate, the using amount is 100-150 g/t, a sulfur inhibitor is KMD-1, and the using amount is 3000-4000 g/t; collecting agents are one or more of butyl xanthate, ethyl xanthate and isoamyl xanthate, and the using amount is 30-50 g/t; the foaming agent is 24k, and the dosage is 20-30 g/t; roughly selecting the collecting agent and the foaming agent by reference, and reducing the using amount by half in sequence; the first-stage selected dispersing agent is sodium hexametaphosphate, and the using amount is 50-80 g/t; the sulfur inhibitor is KMD-1, and the dosage is 1500-2000 g/t; the collecting agent is one or more of butyl xanthate, ethyl xanthate and isoamyl xanthate, and the using amount is 10-15 g/t; the dispersant used in the two-stage selection is sodium hexametaphosphate with the dosage of 30-50 g/t, and the sulfur inhibitor is KMD-1 with the dosage of 600-1000 g/t.
The invention is further illustrated by the following specific examples:
example 1
In a certain Yuxi selection plant in Yunnan province, the copper content is 0.54 percent, the iron content is 16.72 percent, the main metal minerals are sulfide minerals (chalcopyrite, chalcocite and pyrite), the zinc minerals have nonuniform embedded particle size and large floatability difference, and the ore samples are processed by the following process steps:
A. first-stage ore grinding: and (3) carrying out primary grinding on the crushed copper ore, wherein the grinding fineness is 55% of-74 mu m.
B. Copper and sulfur mixed flotation: carrying out copper-sulfur mixed flotation on the ground ore product, wherein the process conditions of the copper-sulfur mixed flotation roughing 1 are that 500 g/ton of activating agent is added, stirring is carried out for 4 minutes, 80 g/ton of xanthate and 50 g/ton of pine oil are added, and stirring is carried out for 3 minutes; the process conditions of the copper-sulfur mixed flotation roughing 2 are that 40 g/ton of xanthate is added, 20 g/ton of pine oil is added, and stirring is carried out for 3 minutes; the technological conditions of the copper-sulfur mixed flotation scavenging 1 are that 20 g/ton of xanthate is added, 10 g/ton of pine oil is added, and the mixture is stirred for 3 minutes; the process conditions of the copper-sulfur mixed flotation scavenging 2 are that 10 g/ton of xanthate is added, 5 g/ton of pine oil is added, and the mixture is stirred for 3 minutes. And merging the two sections of rough concentration concentrates into bulk concentrate, and returning the two sections of scavenging foams in sequence.
C. Secondary grinding: and D, performing secondary grinding on the bulk concentrate obtained in the step B, wherein the grinding fineness is-74 mu m and accounts for 75%.
D. Copper and sulfur separation and classification rapid flotation: and C, screening and grading the ground ore pulp in the step C by 38 mu m, and carrying out a flotation process of one-stage roughing and two-stage fine selection on the graded coarse fraction by using a flotation machine, wherein the process conditions of the quick flotation and roughing of the copper-sulfur separation coarse fraction flotation machine are that 2500 g/ton of calcium oxide is added, stirring is carried out for 5 minutes, KMY-150 g/ton is added, 24K 20 g/ton is added, and stirring is carried out for 3 minutes. The technological conditions of the copper-sulfur separation coarse fraction flotation machine for the rapid flotation and concentration 1 are that 1200 g/ton of calcium oxide is added, the stirring is carried out for 5 minutes, KMY-115 g/ton is added, 24K 5 g/ton is added, and the stirring is carried out for 3 minutes. The technological conditions of the copper-sulfur separation coarse fraction flotation machine for the rapid flotation and concentration 2 are that 800 g/ton of calcium oxide is added and the mixture is stirred for 5 minutes. The second-stage concentration foam is coarse-grained copper concentrate, the roughing tailings are middlings 1, and the concentration tailings are returned step by step; and the flotation process of one-stage roughing and one-stage fine selection is carried out on the graded fine fraction by adopting a flotation column, and the process conditions of the quick flotation and the rough selection of the copper-sulfur separation fine fraction flotation column are that 3000 g/ton of calcium oxide is added, the stirring is carried out for 5 minutes, KMY-160 g/ton is added, 24K 20 g/ton is added, and the stirring is carried out for 3 minutes. The technological conditions of the copper-sulfur separation fine-fraction flotation column rapid flotation and concentration are that 1500 g/ton of calcium oxide is added and the mixture is stirred for 5 minutes. The selected foam is fine-grained copper concentrate, the rougher tailings are middlings 2, and the selected tailings are returned to rougher flotation; and merging the coarse-grained concentrate and the fine-grained concentrate into copper concentrate 1.
E. Three-stage ore grinding: and D, merging the middling 1 and the middling 2 obtained in the step D for three-stage ore grinding, wherein the grinding fineness is-15 mu m and accounts for 97%.
F. And (3) carrying out column type flotation for recovering micro-fine copper by copper-sulfur separation: e, performing a flotation process of one-section roughing, two-section scavenging and two-section concentrating on the ore pulp obtained by grinding in the step E by using a flotation column under the condition of 5-10% concentration, wherein the copper-sulfur separation column type flotation recovery micro-fine particle copper roughing process conditions include adding 120 g/ton of sodium hexametaphosphate, stirring for 4 minutes, adding KMD-14000 g/ton, stirring for 5 minutes, adding 40 g/ton of ethidium chloride, adding 24K 20 g/ton and stirring for 3 minutes; the technological conditions of scavenging 1 for recovering micro-fine copper particles by copper-sulfur separation column type flotation are that 20 g/ton of ethidium chloride is added, 24K10 g/ton is added, and stirring is carried out for 3 minutes; the technological conditions of scavenging 2 for recovering micro-fine copper particles by copper-sulfur separation column type flotation are that 10 g/ton of ethyl xanthate is added, 24K 105 g/ton is added, and stirring is carried out for 3 minutes; the technological conditions of 1 fine selection of the micro-fine particle copper recovered by the copper-sulfur separation column type flotation are that 60 g/ton of sodium hexametaphosphate is added, stirred for 4 minutes, KMD-12000 g/ton is added, stirred for 5 minutes, 10 g/ton of ethidium chloride is added, 24K 5 g/ton is added, and stirred for 3 minutes; the process conditions of the fine copper concentration 2 include adding 30g/t sodium hexametaphosphate, stirring for 4 minutes, adding KMD-1800 g/t and stirring for 5 minutes. The selected tailings are returned step by step, scavenging foam is returned step by step, the second-stage scavenging tailings are sulfur concentrate, and the second-stage selected foam is copper concentrate 2.
By adopting the process flow to treat the ore, the technical indexes of 26.25% grade of copper concentrate 1, 76.04% recovery rate, 19.22% grade of copper concentrate 2, 9.28% recovery rate, 25.24% grade of comprehensive copper concentrate and 85.32% recovery rate can be obtained. The comprehensive utilization rate of mineral resources is improved.
Example 2
In a certain Fujian Longyan selection plant, copper is 0.60 percent, iron is 17.57 percent, main metal minerals are sulfide minerals (chalcopyrite, chalcocite and pyrite), zinc minerals are unevenly distributed in granularity and have large floatability difference, and the ore samples are processed by the following process steps:
A. first-stage ore grinding: and (3) carrying out primary grinding on the crushed copper ore, wherein the grinding fineness is 50% of that of-74 mu m.
B. Copper and sulfur mixed flotation: carrying out copper-sulfur mixed flotation on the ground ore product, wherein the process conditions of the copper-sulfur mixed flotation roughing 1 are that 300 g/ton of activating agent is added, stirring is carried out for 4 minutes, 90 g/ton of isoamyl xanthate and 24K 40 g/ton are added, and stirring is carried out for 4 minutes; the process conditions of the copper-sulfur mixed flotation roughing 2 are that isoamyl xanthate is added for 45 g/ton, 24K is added for 20 g/ton, and stirring is carried out for 3 minutes; the technological conditions of the copper-sulfur mixed flotation scavenging 1 are that 25 g/ton of isoamyl xanthate is added, 24K10 g/ton is added, and the mixture is stirred for 3 minutes; the technological conditions of the copper-sulfur mixed flotation scavenging 2 are that 10 g/ton of isoamyl xanthate is added, 24K 5 g/ton is added, and the mixture is stirred for 3 minutes. And merging the two sections of rough concentration concentrates into bulk concentrate, and returning the two sections of scavenging foams in sequence.
C. Secondary grinding: and D, performing secondary grinding on the bulk concentrate obtained in the step B, wherein the grinding fineness is-74 mu m and accounts for 70%.
D. Copper and sulfur separation and classification rapid flotation: and C, screening and grading the ground ore pulp in the step C by 38 mu m, and carrying out a flotation process of one-stage roughing and two-stage fine selection on the classified coarse fraction by using a flotation machine, wherein the process conditions of the quick flotation and the coarse selection of the copper-sulfur separation coarse fraction flotation machine are that 3000 g/ton of calcium oxide is added, stirring is carried out for 5 minutes, 60 g/ton of ethyl sulfur nitrogen is added, 24K 20 g/ton is added, and stirring is carried out for 3 minutes. The technological conditions of the copper-sulfur separation coarse fraction flotation machine for the rapid flotation and concentration 1 are that 1500 g/ton of calcium oxide is added, the stirring is carried out for 5 minutes, 15 g/ton of ethion nitrogen is added, 24K 5 g/ton is added, and the stirring is carried out for 3 minutes. The technological conditions of the copper-sulfur separation coarse fraction flotation machine for the rapid flotation and concentration 2 are that 800 g/ton of calcium oxide is added and the mixture is stirred for 5 minutes. The second-stage concentration foam is coarse-grained copper concentrate, the roughing tailings are middlings 1, and the concentration tailings are returned step by step; and the flotation process of one-stage roughing and one-stage fine selection is carried out on the graded fine fraction by adopting a flotation column, and the process conditions of the quick flotation and the rough selection of the copper-sulfur separation fine fraction flotation column are that 3000 g/ton of calcium oxide is added, stirring is carried out for 5 minutes, 60 g/ton of ethidene nitrogen is added, 24K 20 g/ton is added, and stirring is carried out for 3 minutes. The technological conditions of the quick flotation and concentration of the copper-sulfur separation fine-fraction flotation column are that 1000 g/ton of calcium oxide is added and the mixture is stirred for 5 minutes. The selected foam is fine-grained copper concentrate, the rougher tailings are middlings 2, and the selected tailings are returned to rougher flotation; and merging the coarse-grained concentrate and the fine-grained concentrate into copper concentrate 1.
E. Three-stage ore grinding: and D, merging the middling 1 and the middling 2 obtained in the step D for three-stage ore grinding, wherein the grinding fineness is-15 mu m and accounts for 100%.
F. And (3) carrying out column type flotation for recovering micro-fine copper by copper-sulfur separation: e, performing a flotation process of one-section roughing, two-section scavenging and two-section concentration on the ore pulp obtained by grinding in the step E by using a flotation column under the condition of 5-10% concentration, wherein the copper-sulfur separation column type flotation recovery micro-fine particle copper roughing process conditions include adding 150 g/ton of sodium hexametaphosphate, stirring for 4 minutes, adding KMD-13500 g/ton, stirring for 5 minutes, adding 35 g/ton of ethyl xanthate, adding 24K 20 g/ton and stirring for 3 minutes; the technological conditions of scavenging 1 for recovering micro-fine copper particles by copper-sulfur separation column type flotation are that 15 g/ton of ethidium chloride is added, 24K10 g/ton is added, and stirring is carried out for 3 minutes; the technological conditions of scavenging 2 for recovering micro-fine copper particles by copper-sulfur separation column type flotation are that 10 g/ton of ethyl xanthate is added, 24K 105 g/ton is added, and stirring is carried out for 3 minutes; the technological conditions of 1 fine selection of the micro-fine particle copper recovered by the copper-sulfur separation column type flotation are that 80 g/ton of sodium hexametaphosphate is added, the mixture is stirred for 4 minutes, KMD-11800 g/ton is added, the mixture is stirred for 5 minutes, 10 g/ton of ethidium chloride is added, 24K 5 g/ton is added, and the mixture is stirred for 3 minutes; the process conditions of the fine copper concentration 2 include adding sodium hexametaphosphate 40 g/ton, stirring for 4 min, adding KMD-1800 g/ton and stirring for 5 min. The selected tailings are returned step by step, scavenging foam is returned step by step, the second-stage scavenging tailings are sulfur concentrate, and the second-stage selected foam is copper concentrate 2.
By adopting the process flow to treat the ore, the technical indexes of 26.32 percent of grade of copper concentrate 1, 77.46 percent of recovery rate, 18.61 percent of grade of copper concentrate 2, 6.77 percent of recovery rate, 24.36 percent of grade of comprehensive copper concentrate and 84.23 percent of recovery rate can be obtained. The comprehensive utilization rate of mineral resources is improved.
Claims (8)
1. A process for recovering chalcopyrite and chalcocite with uneven embedded particle size from high-yellow-iron mineralized skarnite copper ore is characterized by comprising the steps of first-stage ore grinding, copper-sulfur mixed flotation, second-stage ore grinding, copper-sulfur quick flotation, third-stage ore grinding and copper-sulfur separation column type flotation for copper recovery, and specifically comprises the following steps:
A. first-stage ore grinding: grinding raw ore to-74 mu m, wherein the content of the raw ore is 50-55% to obtain a material a;
B. copper and sulfur mixed flotation: adding an activating agent into the material a to activate to obtain a material b, sequentially adding a collecting agent and a foaming agent into the material b, and performing mixed flotation to obtain a mixed concentrate c and tailings d;
C. secondary grinding: grinding the bulk concentrate c to obtain a material e, wherein the grinding fineness is-74 mu m and accounts for 70-75%;
D. copper and sulfur quick flotation: adding a sulfur inhibitor, a collecting agent and a foaming agent into the material e, and performing copper-sulfur rapid flotation to obtain copper concentrate f, middling g and middling h; specifically, screening and grading a material e:
1) the classified coarse fraction is subjected to a flotation process of one-stage roughing and two-stage concentration by adopting a flotation machine, wherein a sulfur inhibitor, a collecting agent and a foaming agent are added in the roughing, and the sulfur inhibitor is added in the two-stage concentration; the roughing foam enters first-stage concentration, the first-stage concentration foam is immersed in second-stage concentration, and the second-stage concentration foam is coarse copper concentrate; returning the second-stage selected tailings to the first-stage selection, returning the first-stage selected tailings to the rough selection, wherein the rough selection tailings are middlings g;
2) carrying out a first-stage roughing and a first-stage concentrating check process on the fine grading fraction by adopting a flotation column, wherein a sulfur inhibitor, a collecting agent and a foaming agent are added in the roughing process, and the sulfur inhibitor is added in the concentrating process; the roughing foam enters the fine concentration, the fine foam is fine copper concentrate, the fine tailings return to the roughing, and the roughing tailings are middlings h;
3) combining the coarse-grained copper concentrate of step 1) and the fine-grained copper concentrate of step 2) to obtain a copper concentrate f;
E. three-stage ore grinding: merging the middling g and the middling h, and grinding the middling g and the middling h to obtain a material i, wherein the grinding fineness is-15 mu m and is more than 95%;
F. copper is recovered by copper-sulfur separation column flotation: performing one-stage roughing, two-stage scavenging and two-stage concentration on the material i by using a flotation column to obtain a copper concentrate j and a sulfur concentrate k, wherein a dispersant and a sulfur inhibitor are added into the one-stage roughing, two-stage concentration; collecting agents are added in the first-stage rough separation and the second-stage scavenging.
2. The process according to claim 1, wherein the bulk flotation in step B is carried out by adding an activating agent into material a to activate to obtain material B, adding a collecting agent and a foaming agent into material B, roughing the two rough concentrates into a mixed concentrate c, adding the collecting agent and the foaming agent into the roughed tailings to carry out scavenging twice, returning the foam of the scavenging in one section to roughing, scavenging in the other section, returning the foam of the scavenging in the other section to scavenging in the other section, and obtaining the scavenged tailings in the other section, which is the final tailings d.
3. The process according to claim 1 or 2, wherein the activating agent in step B is calcium oxide in an amount of 200-500 g/t.
4. The process for recovering the chalcopyrite and the chalcocite with uneven embedded particle size from the high-pyrite mineralized skatopy copper ore according to claim 1 or 2, wherein the collecting agent in the step B is one or more of butyl xanthate, isoamyl xanthate and butylamine black powder, and the using amount is 80-100 g/t; the foaming agent is terpineol oil or 24K, and the using amount is 40-60 g/t.
5. The process according to claim 1, wherein the screened fraction of step D has a particle size of 38 μm, and the fraction greater than 38 μm is a coarse fraction, i.e. a flotation machine is used for one-stage roughing and two-stage concentration; the size fraction smaller than 38 μm is classified into fine fraction, i.e. a flotation column is used for primary roughing and primary concentrating operation.
6. The process according to claim 1, wherein in step D,
1) the sulfur inhibitor is calcium oxide, and the dosage of a flotation machine and a flotation column in the rough concentration is 2000-3000 g/t; the using amount of a flotation machine and a flotation column in the first-stage concentration is 1000-1500 g/t; the using amount of a flotation machine in the two-stage fine selection is 500-800 g/t, and no flotation column is added;
2) the collecting agent is one or more of ethidium, sulfur and nitrogen and ethidium, and the using amount of a flotation machine in the roughing is 40-60 g/t; the using amount of the flotation column is 60-80 g/t; the using amount of a flotation machine in the first-stage fine selection is 10-20 g/t, and no flotation column is added; second-stage selection is not added;
3) the foaming agent is 24k, and the using amounts of a flotation machine and a flotation column in the rough concentration are both 20-30 g/t; the first-stage concentration and the second-stage concentration are not added.
7. The process according to claim 1, wherein the copper recovery by copper-sulfur separation column flotation in step F is performed by performing a first roughing, a second scavenging and a second concentrating operation on the material i under a low concentration condition by using a flotation column, wherein a dispersant and a sulfur inhibitor are added in the roughing and the second concentrating; adding a collecting agent in rough concentration and two-stage scavenging; immersing roughing foam into first-stage concentration, immersing first-stage concentration foam into second-stage concentration, wherein the second-stage concentration foam is copper concentrate j; the selected tailings are returned step by step, the roughed tailings enter first-stage scavenging, the first-stage scavenging tailings enter second-stage scavenging, scavenging foam is returned step by step, and the second-stage scavenging tailings are sulfur concentrate k.
8. The process for recovering the chalcopyrite and the chalcocite with uneven embedded particle size from the high-pyrite mineralized skatopy copper ore according to claim 1 or 7, wherein the copper and sulfur separation column type flotation for recovering the copper is to use a flotation column to carry out one-stage roughing, two-stage scavenging and two-stage concentration operation to recover the copper with the particle size of more than 95% and the concentration of the roughing flotation is 5 to 10%, the dispersant is sodium hexametaphosphate in an amount of 100 to 150g/t, the sulfur inhibitor is KMD-1 in an amount of 3000 to 4000 g/t; collecting agents are one or more of butyl xanthate, ethyl xanthate and isoamyl xanthate, and the using amount is 30-50 g/t; the foaming agent is 24k, and the dosage is 20-30 g/t; roughly selecting the collecting agent and the foaming agent by reference, and reducing the using amount by half in sequence; the first-stage selected dispersing agent is sodium hexametaphosphate, and the using amount is 50-80 g/t; the sulfur inhibitor is KMD-1, and the dosage is 1500-2000 g/t; the collecting agent is one or more of butyl xanthate, ethyl xanthate and isoamyl xanthate, and the using amount is 10-15 g/t; the dispersant of the two-stage selection is sodium hexametaphosphate with the dosage of 30-50 g/t, and the sulfur inhibitor is KMD-1 with the dosage of 600-1000 g/t; the main components of the KMD-1 are 50-80% of calcium oxide, 10-20% of sodium sulfide and 20-30% of sodium dithionate.
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| CN111229470A (en) * | 2020-03-09 | 2020-06-05 | 宜春市金地锂业有限公司 | Mineral separation activating agent for lepidolite flotation process |
| CN111298984A (en) * | 2020-03-27 | 2020-06-19 | 云南铁峰矿业化工新技术有限公司 | Collecting agent |
| CN112264197B (en) * | 2020-09-22 | 2022-11-11 | 铜陵有色金属集团股份有限公司 | Combined inhibitor for high-magnetic pyrite type copper-sulfur ore and beneficiation method thereof |
| CN113369019B (en) * | 2021-06-07 | 2022-07-05 | 矿冶科技集团有限公司 | Method for improving recovery rate of valuable metal |
| CN113926586B (en) * | 2021-10-25 | 2022-12-20 | 紫金矿业集团股份有限公司 | High-sulfuration type shallow copper forming ore and ore dressing method for fine utilization of tailings thereof |
| CN114534906B (en) * | 2022-03-08 | 2023-11-17 | 昆明冶金研究院有限公司 | Beneficiation method for molybdenum-containing high-zinc complex magnesium silicate-modified silicon-stuck-rock copper ore |
| CN114749270A (en) * | 2022-04-15 | 2022-07-15 | 昆明冶金研究院有限公司 | Mineral processing technology for recovering copper from copper-sulfur ore containing secondary copper sulfide ore |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012149320A (en) * | 2011-01-20 | 2012-08-09 | Jx Nippon Mining & Metals Corp | Method for treating copper concentrate |
| CN102921554A (en) * | 2012-11-26 | 2013-02-13 | 昆明理工大学 | Step regrinding and stage desulphurization method for high sulfur-copper-zinc ore |
| CN106733203A (en) * | 2016-12-02 | 2017-05-31 | 北京矿冶研究总院 | Beneficiation method for skarn copper ore |
| CN107282312A (en) * | 2017-06-20 | 2017-10-24 | 厦门紫金矿冶技术有限公司 | A kind of fine copper-sulphide ores sorting process of disseminated grain size |
| CN110292984A (en) * | 2019-07-05 | 2019-10-01 | 紫金矿业集团股份有限公司 | The embedding cloth type copper sulfide ore substep grinding flotation method of coarse grain containing vitreous copper |
| CN110328046A (en) * | 2019-07-10 | 2019-10-15 | 青海省地质矿产测试应用中心 | Method for sorting skarn type low-grade copper-zinc ore |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MA42580B1 (en) * | 2015-11-25 | 2020-10-28 | Cytec Ind Inc | Compositions of collectors and methods thereof for use in mineral flotation processes |
-
2019
- 2019-11-25 CN CN201911165895.3A patent/CN110841796B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012149320A (en) * | 2011-01-20 | 2012-08-09 | Jx Nippon Mining & Metals Corp | Method for treating copper concentrate |
| CN102921554A (en) * | 2012-11-26 | 2013-02-13 | 昆明理工大学 | Step regrinding and stage desulphurization method for high sulfur-copper-zinc ore |
| CN106733203A (en) * | 2016-12-02 | 2017-05-31 | 北京矿冶研究总院 | Beneficiation method for skarn copper ore |
| CN107282312A (en) * | 2017-06-20 | 2017-10-24 | 厦门紫金矿冶技术有限公司 | A kind of fine copper-sulphide ores sorting process of disseminated grain size |
| CN110292984A (en) * | 2019-07-05 | 2019-10-01 | 紫金矿业集团股份有限公司 | The embedding cloth type copper sulfide ore substep grinding flotation method of coarse grain containing vitreous copper |
| CN110328046A (en) * | 2019-07-10 | 2019-10-15 | 青海省地质矿产测试应用中心 | Method for sorting skarn type low-grade copper-zinc ore |
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