CN114798188B - Mineral separation method of talc-containing copper ore - Google Patents
Mineral separation method of talc-containing copper ore Download PDFInfo
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- CN114798188B CN114798188B CN202210459122.1A CN202210459122A CN114798188B CN 114798188 B CN114798188 B CN 114798188B CN 202210459122 A CN202210459122 A CN 202210459122A CN 114798188 B CN114798188 B CN 114798188B
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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
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a mineral separation method of copper ores containing talcum, which comprises the following steps: (1) Adding a foaming agent A into raw ore pulp to perform talc prefloat so as to obtain talc tailings and prefloat concentrate; (2) Sequentially roughing and concentrating the pre-flotation concentrate obtained in the step (1) by using a flotation reagent to obtain copper concentrate; the foaming agent A consists of pine oil, octanol, diesel oil and polysorbate. According to the mineral separation method of the talc-containing copper ore, provided by the invention, by introducing the specific foaming agent into the mineral separation process, the inclusion of the copper ore during the pre-flotation of the talc-containing copper ore can be effectively reduced, the recovery rate of copper in the pre-flotation process of the talc-containing copper ore is remarkably improved, and the accurate tailing discarding in the pre-flotation stage is realized.
Description
Technical Field
The invention relates to the field of copper ore floatation, in particular to a mineral separation method of talc-containing copper ore.
Background
At present, copper is widely applied to important fields in national economy due to excellent performance in aspects of extension, heat conduction, electric conduction and the like, and is an important strategic resource. Copper has been identified worldwide as about 3.5-5.7 hundred million tons, with copper sulfide ore accounting for more than about 75% of the total. However, due to the influence of geological mineralization factors, part of copper sulfide ores contain more easily-floated gangue minerals such as talcum and the like, and the easily-floated gangue minerals such as talcum and the like have strong natural hydrophobicity, excellent floatability, low hardness and easy mud formation in the grinding process. The slimed talcum shows superior floating speed to copper minerals in flotation, is easy to attach to the surface of copper minerals, cannot effectively act with a collector, has adverse effects on copper mineral separation, affects the grade of copper concentrate, and reduces copper recovery rate.
Treatment of such talc-containing copper ores generally employs two methods:
a is to add a large amount of macromolecule inhibitor (such as single use and combined use of carboxymethyl cellulose, guar gum, starch, dextrin, polyacrylamide, etc.) to inhibit talcum in copper flotation, for example CN111229451A has disclosed a talcum and chalcopyrite's flotation separation method, the invention adopts carboxymethyl cellulose, CTP, three kinds of medicament combinations of calcium lignosulfonate as the inhibitor to separate talcum and chalcopyrite's flotation for the first time, possess the high-efficient selective inhibition effect to talcum, can disperse clay mineral and chalcopyrite granule effectively at the same time, hinder the foam entrainment phenomenon of the hydrophilic gangue mineral; the adverse effect of unavoidable ions in ore pulp is eliminated, the selective inhibition effect of the inhibitor is further enhanced, and gangue minerals which are easy to float, such as talcum, chlorite and the like, are selectively inhibited, so that the flotation separation of minerals is facilitated, the grade and recovery rate of copper concentrate are improved, and the mineral dressing index is greatly improved; compared with the conventional talcum inhibitor, the combined inhibitor has synergistic effect of three medicaments, has double properties of inhibition and dispersibility, can greatly improve the beneficiation index of copper, and has market application value. However, the use of the polymer inhibitor has larger defects, firstly, the polymer inhibitor is generally poor in solubility and difficult to prepare and use; secondly, the high molecular inhibition viscosity is larger, the environment of the flotation ore pulp is deteriorated, the grade of copper concentrate is low due to inclusion, filter cloth is blocked during filtration, and the sedimentation of tailings is affected; thirdly, the macromolecular inhibitor has a certain inhibition on copper minerals and has adverse effect on copper recovery; fourth, the high molecular inhibitor is generally high in price and large in dosage, and the enterprise cost is increased.
The other method is to add a foaming agent to perform flotation in advance to remove talcum, so as to eliminate the influence of talcum on copper flotation, but the removed talcum has higher foam copper content, and copper loss is caused by direct tail throwing. As CN111451003a discloses a method for beneficiating easily-slimed, easily-floated copper-containing talcum-serpentine ore, which comprises the following steps: (1), grinding: grinding the easily-slimed and easily-floated copper-containing talcum-serpentine ore to obtain raw ore pulp; (2) desliming flotation in advance: adding a foaming agent into raw ore pulp, and performing pre-flotation on the sliming easy-to-float gangue, so as to obtain pre-desliming foam and pre-desliming ore pulp; (3) pre-desliming froth individual flotation: (4) carrying out independent floatation on the ore pulp after the pre-desliming; the method optimizes the flotation environment of the ore pulp after the pre-desliming by pre-desliming the raw ore pulp, creatively provides a technical scheme of firstly suppressing copper floating mud, reactivating copper flotation enrichment of the ore pulp after the reverse flotation desliming, and avoids the influence of a large amount of mud-containing gangue on the copper enrichment in the pre-desliming foam, thereby greatly reducing the dosage of medicaments and providing powerful guarantee for improving the quality of copper concentrate.
Therefore, how to eliminate the influence of talcum, more effectively sort the copper ores containing talcum, and improve the grade and recovery rate of copper concentrate is a difficult problem to be solved urgently.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a mineral separation method of copper ore containing talcum, which overcomes various defects caused by the traditional adoption of a high molecular inhibitor to inhibit talcum and simultaneously avoids copper loss caused by pre-removing talcum.
To achieve the purpose, the invention adopts the following technical scheme:
the invention provides a mineral separation method of copper ores containing talcum, which comprises the following steps:
(1) Adding a foaming agent A into raw ore pulp to perform talc prefloat so as to obtain talc tailings and prefloat concentrate;
(2) Sequentially roughing and concentrating the pre-flotation concentrate obtained in the step (1) by using a flotation reagent to obtain copper concentrate;
the foaming agent A consists of pine oil, octanol, diesel oil and polysorbate.
According to the mineral separation method of the talc-containing copper ore, provided by the invention, by introducing the specific foaming agent into the mineral separation process, the inclusion of the copper ore during the pre-flotation of the talc-containing copper ore is obviously reduced, the copper in the pre-flotation process of the talc-containing copper ore can be efficiently enriched, and the accurate tailing discarding in the pre-flotation stage is realized.
As a preferred technical scheme of the invention, the mass ratio of the pinitol oil, the octanol, the diesel oil and the polysorbate in the foaming agent A is (60-70): (20-30): (5-12): (1-3), for example, the mass ratio can be 60:20:5:1, 60:30:5:1, 60:20:8:1, 60:20:10:1, 60:20:12:1, 65:20:5:1, 60:20:5:2, 60:20:5:3, 60:30:12:1, 70:25:8:2 or 65:30:8:2, etc., but the foaming agent A is not limited to the listed values, and other non-listed values in the range are equally applicable.
In the present invention, the octanol may be n-octanol, isooctyl alcohol, sec-octanol, or the like, and other isomers of n-octanol, such as a combination of n-octanol and isooctyl alcohol, a combination of isooctyl alcohol and sec-octanol, or the like.
In the present invention, the main component of the pinitol oil is terpene alcohol (C 10 H 17 OH) is cyclic and has three isomers (alpha-terpene alcohol, beta-enol, gamma-terpene alcohol). The pinitol oil is light yellow oily transparent liquid, has pungent smell, is flammable and is slightly soluble in water; can be oxidized in the air, and after oxidation, the viscosity is increased, and the mineral separation performance is reduced due to decomposition when the mineral separation agent is subjected to acid or heating. The foam property of the pinitol oil is strong, and bubbles with uniform size, medium viscosity and proper stability can be generated; the foam formed by the pinitol oil in the flotation operation is more stable than other foaming agents; when the dosage is too large, bubbles become small, and flotation indexes are affected. The pine oil is widely used in the flotation of various metallic or non-metallic ores, and is mainly used for the flotation of various sulphide ores such as copper, lead, zinc and iron ores and various non-sulphide ores. It also has a certain collecting property, and has obvious collecting effect on talcum, sulfur, graphite, molybdenite, coal and other easily-floated minerals.
In the present invention, the octanol (C 8 H 18 O) is a saturated fatty alcohol, colorless transparent oily liquid, has strong grease smell and citrus smell, is mainly used as a solvent or a production surfactant, and is widely used for daily chemicals, personal care, fabric washing, fabric softening, corrosion resistance, printing and dyeing auxiliary agents and the like. The linear alcohol homolog gradually reduces the solubility in water with the increase of the number of carbon atoms, and the foaming capacity is increased with the increase of the solubility in water; by the time the number of carbon atoms reaches 5, 6, 7, 8 (i.e., pentane, hexane, heptyl, octyl alcohol), the foamability reaches several points, and thereafter, the foamability gradually decreases as the number of carbon atoms increases. The octanol carbon number is 8, the surface tension of water can be obviously reduced, the foaming performance is enhanced along with the increase of the surface activity, and the bubbles are stable.
In the present invention, the diesel fuel is a light petroleum product, a complex hydrocarbon (having about 10 to 22 carbon atoms) mixture. The diesel oil is a good solvent, can increase the dispersibility and fluidity of the foaming agent, can eliminate excessive foam, promote the secondary enrichment of the foam, has a certain collecting property, and has obvious collecting effect on talcum, sulfur, graphite, molybdenite, coal and other easily-floated minerals.
In the invention, the foaming agent A is prepared by mixing, for example, the materials can be directly mixed, or part of the materials can be mixed first and then sequentially mixed with other materials, in the step mixing, the pine oil and the octanol are firstly mixed and stirred for the first time according to the formula, the obtained materials are mixed with the polysorbate for the second time, and then the obtained materials are mixed and stirred for the third time with diesel oil, so that the flotation foaming agent is obtained; the first mixing and stirring time is 10-20min, and the speed is 60-100r/min; the second mixing and stirring time is 10-20min, and the speed is 60-100r/min; the third mixing and stirring time is 10-20min, and the speed is 60-100r/min. The obtained bubbles are further stabilized, the inclusion of the bubbles on copper ores is reduced, namely the adsorption characteristic of the bubbles on talcum is improved, so that the efficient pre-tailing of talcum is further realized.
Further, the mixing may be performed in a stirrer, or in a reaction kettle, for example, a flat-paddle stirrer, a rotary-paddle stirrer, a turbine stirrer, a special stirrer (anchor stirrer, squirrel cage stirrer, planetary stirrer), and the stirring may be mechanical stirring, air flow stirring, jet stirring, or the like.
Preferably, the polysorbate comprises polysorbate-80.
As a preferable technical scheme of the invention, the raw ore pulp in the step (1) is obtained by grinding the talc-containing copper ore by adding water.
Preferably, the mass percentage of-0.074 mm particles in the raw ore slurry of step (1) is 60-85%, for example 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84% or 85%, etc., but not limited to the values recited, and other non-recited values within this range are equally applicable.
In a preferred embodiment of the present invention, the mass concentration of the raw ore slurry in the step (1) is 30-40%, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% or 40%, etc., but not limited to the recited values, and other values not recited in the range are equally applicable. The mass concentration of ore pulp is too low, which is easy to cause large medicament consumption and affects the recovery rate of copper concentrate; the quality concentration of ore pulp is too high, talcum is easy to cause inclusion, and the grade of copper concentrate is affected.
As a preferred embodiment of the present invention, the amount of the foaming agent A added in the step (1) is 3 to 15g/t, and may be, for example, 3g/t, 4g/t, 5g/t, 6g/t, 7g/t, 8g/t, 9g/t, 10g/t, 11g/t, 12g/t, 13g/t, 14g/t, 15g/t, etc., but not limited to the values recited, and other values not recited in the range are equally applicable.
According to the preferred technical scheme, the talcum tailings in the step (1) are subjected to centrifugal beneficiation, and centrifugal roughing and centrifugal beneficiation are sequentially carried out.
The enrichment ratio of the centrifugal concentrator has a certain range, the grade of the copper concentrate 1 is difficult to ensure by only carrying out one-time roughing, and meanwhile, the grade of the copper concentrate 1 can be ensured by using a combined process of one-time roughing and one-time concentration, so that the centrifugal concentrating process is more stable and efficient.
As a preferred embodiment of the present invention, the flotation reagent in step (2) includes a pH adjuster, a collector and a frother B.
Preferably, the pH adjuster in the flotation reagent of step (2) comprises lime.
Preferably, the collector in the flotation reagent in step (2) comprises 1 or at least 2 of a combination of thiourethane, ester-105, ethionazole or isobutyl sodium black drug, which can be a combination of thiourethane and ester-105, a combination of ester-105 and ethionazole, a combination of ethionazole and isobutyl sodium black drug, or a combination of thiourethane, ester-105, ethionazole and isobutyl sodium black drug, etc., but not limited to the listed combinations, other non-listed combinations within this range are equally applicable.
Preferably, the frother B in the flotation reagent of step (2) comprises a No. two oil.
In the present invention, the blowing agent B is a conventional blowing agent in the art, and does not include the blowing agent A specified in the present invention.
In the roughing of step (2), the pH of the pulp is adjusted to 9.5-10.5 by using a pH adjuster, for example, 9.5, 9.6, 9.7, 9.8, 9.9, 10, 10.1, 10.2, 10.3, 10.4 or 10.5, but not limited to the recited values, and other non-recited values within the range are equally applicable.
Preferably, the amount of collector used in the coarse selection in step (2) is 20-80g/t, for example, 20g/t, 22g/t, 24g/t, 26g/t, 28g/t, 30g/t, 32g/t, 34g/t, 36g/t, 38g/t, 40g/t, 42g/t, 44g/t, 46g/t, 48g/t, 50g/t, 52g/t, 54g/t, 56g/t, 58g/t, 60g/t, 62g/t, 64g/t, 66g/t, 68g/t, 70g/t, 72g/t, 74g/t, 76g/t, 78g/t, 80g/t, etc., but the amount is not limited to the values recited, and other values not recited in this range are equally applicable.
Preferably, the amount of the foaming agent B used in the coarse selection in the step (2) is 5 to 30g/t, for example, 5g/t, 6g/t, 7g/t, 8g/t, 9g/t, 10g/t, 11g/t, 12g/t, 13g/t, 14g/t, 15g/t, 16g/t, 17g/t, 18g/t, 19g/t, 20g/t, 21g/t, 22g/t, 23g/t, 24g/t, 25g/t, 26g/t, 27g/t, 28g/t, 29g/t or 30g/t, etc., but the above-mentioned values are not limited thereto, and other values not listed in the above range are equally applicable.
Preferably, the roughing of step (2) is performed at least once.
In the invention, the dosage of the pH regulator, the collector and the foaming agent in the roughing process is the total dosage of each agent, for example, the roughing process is carried out twice, and the total dosage of the collector in the roughing process is 20-80g/t.
Preferably, the tailings obtained from the roughing in step (2) are subjected to at least 2 scavenger operations, for example, 2, 3, 4, 5, 6 or 7 scavenger operations, but not limited to the listed values, and other non-listed values within this range are equally applicable.
In the invention, in order to further avoid the waste of useful mineral copper ores, scavenging can be performed on roughing tailings so as to further improve the recovery effect of the copper ores.
In the invention, the collecting agent is added in the scavenging process, for example, when the scavenging is carried out for 2 times, the dosage of the collecting agent in the scavenging I and the scavenging II is respectively 5-15g/t independently, for example, 5g/t, 6g/t, 7g/t, 8g/t, 9g/t, 10g/t, 11g/t, 12g/t, 13g/t, 14g/t or 15g/t and the like, but the collecting agent is not limited to the enumerated values, and other non-enumerated values in the range are applicable; the amount of the foaming agent is 3 to 8g/t independently, and may be, for example, 3g/t, 4g/t, 5g/t, 6g/t, 7g/t, 8g/t, etc., but is not limited to the recited values, and other values not recited in the range are equally applicable.
In a preferred embodiment of the present invention, the selection in step (2) is performed at least 3 times, for example, 3 times, 4 times, 5 times, 6 times, 7 times, or 8 times, etc., but the present invention is not limited to the recited values, and other values not recited in the range are equally applicable. The middlings obtained after the concentration are sequentially returned to the previous operation for concentration, for example, the middlings obtained after the concentration are returned to the previous concentration operation.
In the invention, other flotation agents such as collecting agents, inhibitors, foaming agents and the like can be added in the selection process according to actual demands so as to further strengthen flotation indexes.
Preferably, in the step (2), the pH value of the ore pulp is adjusted to 10.5-12 by using a pH regulator. Through further limiting the pH range, sulfur in the copper roughing concentrate is further selectively inhibited, and meanwhile, the floating of copper is not influenced, so that the efficient recovery of copper is realized.
If the copper roughing concentrate is subjected to three-time concentration, the pH regulator lime is adopted for the concentration I, the concentration II and the concentration III, and the pH value of the ore pulp is regulated to be 10.5-12.0.
In the invention, the addition amount g/t refers to the addition of a medicament with corresponding mass per ton of crude talc copper ore.
As a preferred technical scheme of the invention, the beneficiation method comprises the following steps:
(1) Adding a foaming agent A into raw ore pulp to perform talc prefloat so as to obtain talc tailings and prefloat concentrate;
the foaming agent A consists of pine oil, octanol, diesel oil and polysorbate, wherein the mass ratio of the pine oil to the octanol is (60-70), the mass ratio of the pine oil to the octanol is (20-30), the mass ratio of the pine oil to the octanol is (5-12), and the mass ratio of the pine oil to the octanol is (1-3); the polysorbate comprises polysorbate-80; the raw ore pulp is obtained by grinding copper ore containing talcum by adding water; the mass percentage of particles with the diameter of-0.074 mm in the raw ore pulp in the step (1) is 60-85 percent; the mass concentration of the raw ore pulp is 30-40%; the addition amount of the foaming agent A is 3-15g/t; the talcum tailings are subjected to centrifugal beneficiation, and centrifugal roughing and centrifugal beneficiation are sequentially carried out;
(2) Sequentially roughing and concentrating the pre-flotation concentrate obtained in the step (1) by using a flotation reagent to obtain copper concentrate;
the flotation reagent comprises a pH regulator, a collector and a foaming agent B; the pH regulator in the flotation reagent comprises lime; the collector in the flotation reagent comprises 1 or a combination of at least 2 of a thiourethane, an ester-105, ethionazide, or an isobutylsodium black drug; the foaming agent B in the flotation reagent comprises No. two oil;
the pH value of the ore pulp is adjusted to 9.5-10.5 by adopting a pH regulator in the roughing; the addition amount of the collector used in the coarse selection is 20-80g/t; the addition amount of the foaming agent B used in the coarse selection is 5-30g/t; the roughing is carried out at least once; the tailings obtained by roughing are subjected to scavenging for at least 2 times;
the beneficiation is performed at least 3 times; and in the concentration, a pH regulator is adopted to regulate the pH value of the ore pulp to 10.5-12.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) When the raw ore containing the talcum copper ore is treated, the specific foaming agent is adopted to perform talcum prefloat on the raw ore pulp, so that the talcum ore is efficiently removed, the inclusion of the copper ore is reduced, the technical scheme of using the traditional high molecular inhibitor to inhibit talcum flotation copper is avoided, the defects that the traditional high molecular inhibitor is poor in solubility, difficult to prepare and use, high in viscosity, capable of deteriorating the environment of the flotation ore pulp, entering the copper concentrate, blocking filter cloth during filtration, affecting tailing sedimentation, inhibiting copper minerals from affecting copper recovery rate, high in medicament cost and the like are overcome, and finally the recovery rate of copper reaches more than 90%.
(2) The talc foam product obtained by pre-flotation does not adopt the traditional high molecular inhibitor-added copper-floating-inhibiting or copper-floating-inhibiting process, or the talc foam product directly throws the tail, thereby causing copper loss. According to the invention, the environment-friendly centrifugal concentrating machine is adopted to centrifugally concentrate the talcum foam product, copper concentrate is further produced, the recovery rate of copper can be further ensured, and the influence of talcum on copper flotation and various defects of using a high molecular inhibitor are avoided.
(3) The method has strong adaptability, can treat copper mine resources with different talcum contents in an environment-friendly and efficient way, and the produced copper concentrate has high quality, low impurity content and high copper recovery rate; the production process is stable, and the operation and the management are easy, thus being an environment-friendly and efficient mineral separation method for utilizing the talc-containing copper ore resources.
Drawings
Fig. 1 is a process flow diagram of a beneficiation process provided in embodiment 1 of the present invention.
The present invention will be described in further detail below. The following examples are merely illustrative of the present invention and are not intended to represent or limit the scope of the invention as defined in the claims.
Detailed Description
For a better illustration of the present invention, which is convenient for understanding the technical solution of the present invention, exemplary but non-limiting examples of the present invention are as follows:
example 1
Flotation was performed on a certain talc-containing copper ore raw ore (Cu content 0.81%, S content 10.13%, talc mineral content 12.67%).
Specifically, the talcum is treated by combining talcum prefloating and centrifugal dressing (a coarse and fine centrifugal dressing process) after raw ore is ground, the ore pulp after talcum prefloating adopts a coarse and two-sweep and three-fine floatation process, middlings obtained by carefully selecting I and sweeping I are returned to coarse dressing, middlings obtained by carefully selecting II and carefully selecting III are sequentially returned to the previous carefully selecting operation, and middlings obtained by sweeping II are returned to the first dressing process, wherein the process is shown in figure 1 and specifically comprises the following steps:
(a) Grinding the raw ore containing the talc copper ore to the fineness of-0.074 mm accounting for 65%, and preparing raw ore pulp with the mass concentration of 33%;
(b) Adding a foaming agent A10g/t into the raw ore pulp, and performing talc prefloat so as to obtain talc tailings and prefloat concentrate;
(c) The talcum tailings enter a centrifugal concentrating machine for centrifugal concentrating, and are subjected to primary roughing and primary concentrating, so that copper concentrate 1 and tailings 1 are obtained;
(d) Sequentially adding pH regulator lime (regulating the pH value of ore pulp to 9.5), copper collector thiourethane 50g/t and foaming agent B No. two oil 15g/t into the pre-flotation concentrate for primary roughing to obtain copper roughing concentrate and roughing tailings; the roughing tailings are subjected to twice scavenging, the consumption of the collecting agent thiamine ester is 15g/t and 10g/t in the scavenging I and scavenging II processes, the consumption of the foaming agent is 7g/t and 5g/t respectively, and the middlings obtained after scavenging are sequentially returned to the previous operation for sorting;
(e) Performing three concentration operations on the copper roughing concentrate obtained in the step (d), respectively adding pH regulator lime into the concentration I, the concentration II and the concentration III, regulating the pH value of ore pulp to be 12.0, and obtaining copper concentrate 2 after the concentration is completed;
(f) Mixing the copper concentrate 1 and the copper concentrate 2 together to obtain copper concentrate;
wherein the foaming agent A is formed by mixing pine oil, octanol (n-octanol), diesel oil and polysorbate-80 according to the mass ratio of 70:20:10:1.
Specifically, the content of talcum mineral in the talcum-containing copper ore is 12.67%, and a large amount of easily-slimed talcum seriously influences the recovery of copper mineral. Through detection, the copper content in the talcum foam is 0.28%, and finally the obtained closed-circuit test indexes are as follows: copper concentrate contained 20.52% copper with a copper recovery of 90.69%.
Example 2
Some crude talc-containing copper ore (Cu content: 0.41%, S content: 3.83%, talc mineral content: 10.29%) was subjected to beneficiation.
Specifically, the talcum is treated by combining talcum prefloating and centrifugal dressing (a coarse and fine centrifugal dressing process) after raw ore is ground, the ore pulp after talcum prefloating adopts a coarse and two-sweep and three-fine floatation process, middlings obtained by carefully selecting I and sweeping I are returned to coarse dressing, middlings obtained by carefully selecting II and carefully selecting III are sequentially returned to the previous carefully selecting operation, and middlings obtained by sweeping II are returned to the first dressing process, which specifically comprises the following steps:
(a) Grinding the raw ore containing the talc copper ore to the fineness of-0.074 mm accounting for 70%, and preparing raw ore pulp with the mass concentration of 35%;
(b) Adding a foaming agent A8g/t into the raw ore pulp, and performing talc prefloat so as to obtain talc tailings and prefloat concentrate;
(c) The talcum tailings enter a centrifugal concentrating machine for centrifugal concentrating, and are subjected to primary roughing and primary concentrating, so that copper concentrate 1 and tailings 1 are obtained;
(d) Sequentially adding pH regulator lime (regulating the pH value of ore pulp to 10.5), copper collector thiourethane 40g/t and foaming agent B No. two oil 12g/t into the pre-flotation concentrate for primary roughing to obtain copper roughing concentrate and roughing tailings; the roughing tailings are subjected to twice scavenging, the consumption of the collecting agent thiamine ester is respectively 10g/t and 7g/t in the scavenging I and scavenging II processes, the consumption of the foaming agent is respectively 5g/t and 3g/t, and the middlings obtained after scavenging are sequentially returned to the previous operation for sorting;
(e) Performing three concentration operations on the copper roughing concentrate obtained in the step (d), respectively adding pH regulator lime into the concentration I, the concentration II and the concentration III, regulating the pH value of ore pulp to be 10.5, and obtaining copper concentrate 2 after the concentration is completed;
(f) Mixing the copper concentrate 1 and the copper concentrate 2 together to obtain copper concentrate;
wherein the foaming agent A is formed by mixing pine oil, octanol (isooctanol), diesel oil and polysorbate-80 according to the mass ratio of 63:30:5:3.
Specifically, the content of the talcum mineral of the talcum-containing copper ore is 10.29%, a large amount of easily-slimed talcum seriously influences the recovery of copper minerals, and the copper mineral is treated by adopting the beneficiation method of the talcum-containing copper ore. Through detection, the copper content in the talcum tailings is 0.26%, and the finally obtained closed circuit test indexes are as follows: copper concentrate contains 18.42% copper, and the copper recovery rate is 90.15%.
Example 3
The only difference from example 1 is that the frother A is replaced by 1000g/t carboxymethyl cellulose, i.e. treated with the traditional conventional carboxymethyl cellulose-inhibited talc flotation process. Through detection, the copper concentration contains 15.21% of copper, and the copper recovery rate is 84.62%.
Example 4
The method comprises the steps of treating talcum-containing copper ore in the embodiment 1 by adopting a traditional conventional flotation method, grinding raw ore, adding a foaming agent to perform pre-flotation on talcum, removing direct tail discarding of talcum, and performing a coarse two-sweep three-fine flotation process on ore pulp after pre-flotation on talcum, wherein middlings obtained by fine selection I and scavenging I return to coarse selection, middlings obtained by fine selection II and fine selection III return to the previous fine selection operation in sequence, and middlings obtained by scavenging II return to the first fine selection operation, and concretely comprises the following steps:
(a) Grinding the raw ore containing the talc copper ore to the fineness of-0.074 mm accounting for 65%, and preparing raw ore pulp with the mass concentration of 33%;
(b) Adding a foaming agent A10g/t into the raw ore pulp, and performing talc prefloat so as to obtain talc tailings and prefloat concentrate;
(c) Sequentially adding pH regulator lime (regulating the pH value of ore pulp to 10), copper collector thiourethane 50g/t and foaming agent B No. two oil 15g/t into the ore pulp after talc pre-flotation for primary roughing to obtain copper roughing concentrate and roughing tailings; the roughing tailings are subjected to twice scavenging, the consumption of the collecting agent thiamine ester is 15g/t and 10g/t in the scavenging I and scavenging II processes, the consumption of the foaming agent is 7g/t and 5g/t respectively, and the middlings obtained after scavenging are sequentially returned to the previous operation for sorting;
(d) Performing three concentration operations on the copper roughing concentrate obtained in the step (d), respectively adding pH regulator lime into the concentration I, the concentration II and the concentration III, regulating the pH value of ore pulp to 11.2, and obtaining copper concentrate after the concentration is completed;
wherein the foaming agent A is formed by mixing pine oil, octanol (sec-octanol), diesel oil and polysorbate-80 according to the mass ratio of 70:20:10:1.
Specifically, the content of talcum mineral in the talcum-containing copper ore is 12.67%, a large amount of easily-slimed talcum seriously influences the recovery of copper mineral, a foaming agent is firstly added to pre-float the talcum by adopting a traditional conventional method, the talcum is removed to directly throw off the tail, and ore pulp is subjected to copper floatation process treatment after the talcum pre-floatation. Through detection, the copper content in the talcum tailings is 0.30%; the final obtained closed-circuit test indexes are as follows: copper concentrate contains 20.12% of copper, and the copper recovery rate is 88.10%.
Example 5
The difference from example 4 is only that the pine oil is used as foaming agent A, and the copper content in the talcum tailings is 1.07% through detection; the final obtained closed-circuit test indexes are as follows: copper concentrate contains 20.18% of copper, and the copper recovery rate is 85.13%.
Example 6
The difference from example 1 is only that the pine oil is used as foaming agent A, and the copper content in the talcum tailings is 1.12% through detection; the final obtained closed-circuit test indexes are as follows: copper concentrate contains 20.21% copper and the copper recovery rate is 87.17%.
Example 7
The difference from example 4 is only that the para-octanol is replaced by the GF oil of equal quantity, and the copper content in the talcum tailings is 1.22% through detection; the final obtained closed-circuit test indexes are as follows: copper concentrate contained 20.36% copper with a copper recovery of 84.32%.
Example 8
The difference from example 4 is only that the foaming agent A is replaced by butyl ether alcohol with the same amount, and the copper content in the talcum tailings is 0.89% through detection; the final obtained closed-circuit test indexes are as follows: copper concentrate contains 20.14% of copper, and the copper recovery rate is 86.47%.
According to analysis of the embodiment, when the flotation process is adopted to treat the raw ore of the talcum-containing copper ore, talcum pre-flotation is carried out on raw ore pulp, so that talcum minerals are removed in advance, the technical scheme that the traditional polymer inhibitor is adopted to inhibit talcum flotation copper is avoided, and the defects that the traditional polymer inhibitor is poor in solubility, difficult to prepare and use, high in viscosity, capable of deteriorating the environment of flotation ore pulp, capable of being mixed into copper concentrate, blocking filter cloth during filtration, affecting tailing sedimentation, inhibiting copper minerals from affecting copper recovery rate, high in medicament cost and the like are overcome.
It is stated that the detailed structural features of the present invention are described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e., it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be apparent to those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope of the present invention and the scope of the disclosure.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (20)
1. A method of beneficiating a talc-containing copper ore, the method comprising:
(1) Adding a foaming agent A into raw ore pulp to perform talc prefloat so as to obtain talc tailings and prefloat concentrate;
(2) Sequentially roughing and concentrating the pre-flotation concentrate obtained in the step (1) by using a flotation reagent to obtain copper concentrate;
the foaming agent A consists of pine oil, octanol, diesel oil and polysorbate.
2. The beneficiation method according to claim 1, wherein the mass ratio of the pinitol oil, the octanol, the diesel oil and the polysorbate in the foaming agent A is (60-70): (20-30): (5-12): (1-3).
3. The beneficiation process of claim 1, wherein the polysorbate comprises polysorbate-80.
4. The beneficiation method according to claim 1, wherein the raw ore pulp in the step (1) is obtained by grinding talc-containing copper ore by adding water.
5. The beneficiation process according to claim 1, wherein the mass percentage of-0.074 mm particles in the raw ore slurry of step (1) is 60-85%.
6. The beneficiation process according to claim 1, wherein the raw ore pulp of step (1) has a mass concentration of 30-40%.
7. The beneficiation process according to claim 1, wherein the foaming agent a of step (1) is added in an amount of 3-15g/t.
8. The beneficiation method according to claim 1, wherein the talc tailings in the step (1) are subjected to centrifugal beneficiation, and centrifugal roughing and centrifugal beneficiation are sequentially performed.
9. The beneficiation process according to claim 1, wherein the flotation reagent of step (2) comprises a pH adjuster, a collector and a frother B.
10. A process according to claim 9, wherein the pH adjuster in the flotation reagent of step (2) comprises lime.
11. The beneficiation process of claim 9, wherein the collector in the flotation reagent of step (2) comprises 1 or a combination of at least 2 of a thiourethane, an ester-105, ethionazide, or an isobutylsodium black reagent.
12. A process according to claim 9, wherein the frother B in the flotation reagent of step (2) comprises No. two oil.
13. The beneficiation process according to claim 9, wherein the rougher of step (2) employs a pH adjuster to adjust the slurry pH to 9.5-10.5.
14. The beneficiation process according to claim 9, wherein the collector used in the coarse flotation in step (2) is added in an amount of 20-80g/t.
15. A beneficiation process according to claim 9, wherein the frother B is added in an amount of 5-30g/t in the coarse fraction of step (2).
16. The beneficiation process according to claim 1, wherein the roughing of step (2) is performed at least once.
17. The beneficiation process of claim 1, wherein tailings from the roughing of step (2) are subjected to at least 2 scavenger operations.
18. The beneficiation process according to claim 1, wherein the beneficiation in step (2) is performed at least 3 times.
19. The beneficiation process according to claim 1, wherein the beneficiation in step (2) employs a pH adjustor to adjust the slurry pH to 10.5 to 12.
20. A beneficiation process according to any one of claims 1 to 19, wherein the beneficiation process comprises:
(1) Adding a foaming agent A into raw ore pulp to perform talc prefloat so as to obtain talc tailings and prefloat concentrate;
the foaming agent A consists of pine oil, octanol, diesel oil and polysorbate, wherein the mass ratio of the pine oil to the octanol is (60-70), the mass ratio of the pine oil to the octanol is (20-30), the mass ratio of the pine oil to the octanol is (5-12), and the mass ratio of the pine oil to the octanol is (1-3); the polysorbate comprises polysorbate-80; the raw ore pulp is obtained by grinding copper ore containing talcum by adding water; the mass percentage of particles with the diameter of-0.074 mm in the raw ore pulp in the step (1) is 60-85 percent; the mass concentration of the raw ore pulp is 30-40%; the addition amount of the foaming agent A is 3-15g/t; the talcum tailings are subjected to centrifugal beneficiation, and centrifugal roughing and centrifugal beneficiation are sequentially carried out;
(2) Sequentially roughing and concentrating the pre-flotation concentrate obtained in the step (1) by using a flotation reagent to obtain copper concentrate;
the flotation reagent comprises a pH regulator, a collector and a foaming agent B; the pH regulator in the flotation reagent comprises lime; the collector in the flotation reagent comprises 1 or a combination of at least 2 of a thiourethane, an ester-105, ethionazide, or an isobutylsodium black drug; the foaming agent B in the flotation reagent comprises No. two oil;
the pH value of the ore pulp is adjusted to 9.5-10.5 by adopting a pH regulator in the roughing; the addition amount of the collector used in the coarse selection is 20-80g/t; the addition amount of the foaming agent B used in the coarse selection is 5-30g/t; the roughing is carried out at least once; the tailings obtained by roughing are subjected to scavenging for at least 2 times;
the beneficiation is performed at least 3 times; and in the concentration, a pH regulator is adopted to regulate the pH value of the ore pulp to 10.5-12.
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