CN111790517A - Method for sorting copper oxide and copper sulfide mixed ore - Google Patents
Method for sorting copper oxide and copper sulfide mixed ore Download PDFInfo
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- CN111790517A CN111790517A CN202010491679.4A CN202010491679A CN111790517A CN 111790517 A CN111790517 A CN 111790517A CN 202010491679 A CN202010491679 A CN 202010491679A CN 111790517 A CN111790517 A CN 111790517A
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Abstract
The invention discloses a method for sorting mixed ore of copper oxide and copper sulfide, which comprises the following steps: s1, grinding the copper oxide and copper sulfide mixed ore to a fineness of 60-70% below 0.074 mm; s2, adding a regulator, a collector and a foaming agent for copper sulfide ore flotation into the ore pulp obtained in the step S1 for flotation; s3, grinding the copper sulfide rough concentrate obtained in the step S2, and performing air flotation to obtain copper sulfide concentrate; s4, adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper sulfide rougher tailings obtained in the step S2, and performing flotation to obtain copper oxide rougher concentrate; s5, adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate obtained in the step S4 for flotation to obtain copper oxide concentrate and concentration tailings, and scavenging the concentration tailings to produce the copper oxide rough concentrate. The separation method can obtain copper sulfide concentrate and copper oxide concentrate with higher grade and recovery rate, saves investment and can be applied to industrial production.
Description
Technical Field
The invention belongs to the technical field of copper ore treatment, and particularly relates to a method for sorting mixed ores of copper oxide and copper sulfide.
Background
In the copper ore resource, a certain amount of oxygen-sulfur mixed copper ore resource is formed after the copper sulfide ore deposit is subjected to wind erosion and oxidation, the copper oxide ore has large surface tension and can have a strong effect when meeting water, and the structure of the mineral composition is complex, so that the separation difficulty of the copper oxide ore is increased. The common flotation technology for mixed copper ores has good recovery effect on copper sulfide ores (primary chalcopyrite, secondary copper and copper blue), but has lower separation recovery rate on copper oxide ores.
At present, a mixed flotation process is adopted for mixed ores of copper sulfide ores and copper oxide ores, namely a collecting agent with strong collecting capacity is used for reinforcing the recovery of copper ores, the dosage of a vulcanizing agent can affect the copper sorting index in a grading manner, the floatability of copper sulfide can be inhibited when the dosage is large, and the copper oxide can be insufficiently activated when the dosage is small. Furthermore, a bulk flotation process is used to obtain a bulk concentrate of copper sulphide concentrate and copper oxide concentrate.
In addition, for the mixed ore of copper sulfide ore and copper oxide ore, a hydrometallurgical process method of extraction and extraction liquid electrodeposition after agitation leaching is adopted for recovery, wherein the recovery rate of copper sulfide is low; the bacteria heap leaching is adopted for extraction, and then the electrowinning wet smelting process method is adopted for recovery, the production period is as long as 6 months or even years, and the leaching recovery rate is unstable; the processes of agitation leaching, leached slag flotation, leachate extraction and electrodeposition are adopted, solid-liquid separation equipment is needed for leaching tailings, the continuity and stability of the ore pulp supplied for flotation are poor, the flotation fluctuation is large, and the operation is not easy in industrial production.
Therefore, it is required to develop a method for effectively separating the copper sulfide ore and the copper oxide ore mixed ore, and the recovery rate of the copper sulfide and the copper oxide is improved.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
the mixed ore of copper sulfide ore and copper oxide ore is a common existing form of copper ore, wherein the copper sulfide ore and the copper oxide ore with poor floatability existing in the form of micro-fine particles are difficult to recover in the flotation process, so that the recovery rate of copper is low. If the recovery of most of copper sulfide ores with embedded fine granularity is realized, the separation can be realized only by grinding the raw ores to be finer, so that part of fine mud is generated, the fine mud can deteriorate the flotation environment, and the ore mud is mixed in a foam product to reduce the concentrate grade.
At present, the related technologies of the separation process for the mixed ore of copper sulfide ore and copper oxide ore are as follows:
1. CN101190426B discloses a flotation method of a copper sulphide-oxide mixed copper ore, which adopts the mixed flotation of the copper sulphide ore and the copper oxide ore. The main process comprises the following steps: adding 20-50g/t ethyl amyl xanthate in the ore grinding process, and simultaneously adding a pH regulator to keep the pH of ore pulp at 9.5-10.5; comprises one-time fast separation, one-time rough separation, one-time scavenging and three-time fine separation; adding 20-30g/t of nonane and hydroximic acid and 20-30g/t of foaming agent in the quick selection process; 10-30g/t of ethyl amyl xanthate formate, 10-20g/t of nonyl hydroximic acid and 10-20g/t of foaming agent are added in the roughing process; adding 10-20g/t of nonyl hydroximic acid in the scavenging process; and keeping the pH value of the flotation pulp at 9.5-10.5, realizing the mixed flotation of copper sulfide ores and copper oxide ores, and obtaining the copper sulfide and copper oxide mixed concentrate.
2. CN101961673B discloses a combined dressing and smelting method of mixed copper ore, which adopts a combined process of dressing and wet smelting. The method specifically comprises the following steps: selecting sulfide ore from oxygen-sulfur mixed copper ore with oxidation rate of 10-80% by flotation method to obtain copper concentrate, and adding no copper oxide as flotation activator Na in flotation2And S, stirring and neutralizing the initial ore pulp obtained by grinding to obtain neutralized ore pulp, grading the neutralized ore pulp to obtain graded ore pulp, and performing static flotation on the graded ore pulp to obtain copper concentrate and tailings. Directly carrying out acid leaching and agitation leaching on the tailings after flotation, and obtaining cathode copper through extraction and electrodeposition to form a flotation-acid leaching combined dressing and smelting method.
3. CN106902974B discloses a beneficiation method of mixed copper ore with low oxidation rate and high binding rate, which adopts a combined process of beneficiation and pyrogenic roasting. The method specifically comprises the following steps: aiming at the mixed copper ore with low oxidation rate and high binding rate, copper sulfide minerals and free copper oxide minerals are recovered through flotation, flotation concentrate roasting desulfurization is carried out to obtain copper oxide concentrate, roasting flue gas is used for leaching refractory copper oxide and bound copper in flotation tailings, sodium sulfide is used for precipitating tailings to leach copper ions in ore pulp to obtain copper sulfide concentrate, xanthate is added to carry out flotation to precipitate copper sulfide to obtain copper sulfide concentrate, and the copper sulfide concentrate and mixed copper concentrate of the copper oxide concentrate are mixed and then are roasted for desulfurization to obtain final copper oxide concentrate. The method leaches low-grade tailings through sulfur dioxide generated by sulfur in concentrate, and recovers free copper oxide and combined copper which are difficult to recover in flotation tailings.
4. CN102688807A discloses a temperature-control and mud-suppression flotation method for a high-oxidation-rate and high-mud-containing mixed copper ore, which is used for the high-oxidation-rate and high-mud-containing mixed copper ore. The method specifically comprises the following steps: crushing and grinding the mixed copper ore until the wet grinding is carried out until the ore pulp accounts for 80-90% of minus 200 meshes, feeding the ore pulp after ore grinding into a stirring barrel for size mixing, adding steam to control the temperature of the flotation ore pulp to be 20-40 ℃, then adding activated dispersant ammonium sulfate, then adding activator sodium sulfide, slime inhibitor methanol, slime inhibitor carboxymethyl cellulose sodium and collector isoamyl xanthate, obtaining rough concentrate through one-time flotation, obtaining final copper concentrate through two-time concentration, adding isoamyl xanthate into rough concentrate, and carrying out three-time scavenging to obtain final tailings.
(5) CN103191833B discloses a method for strengthening the copper hematite vulcanization process in mixed copper ore flotation, which adopts a copper oxide ore reinforced vulcanization process. The specific process comprises the following steps of; aiming at the mixed copper ore mainly containing high calcium and magnesium, high oxidation rate and cuprite, firstly, the chalcopyrite is adopted to directly float the copper sulfide ore, after the copper sulfide is floated, the ore pulp containing the cuprite is added with ferric sulfate, hydrogen peroxide and ammonium persulfate, and the mixture is stirred for a long time to carry out the reinforced oxidation of the surface of the cuprite. The chalcopyrite collecting agent is added into the red copper ore pulp after the reinforced vulcanization for flotation and recovery of copper oxide ore, cuprous oxide on the surface of the red copper ore is converted into copper oxide, the vulcanization reaction activity is improved, and the reinforced vulcanization effect is achieved. The surface of the pre-oxidized cuprite is vulcanized by combining ammonium sulfide and sodium sulfide, so that the use efficiency of the medicament is improved.
In addition, for the mixed ore of copper sulfide ore and copper oxide ore, a hydrometallurgical process method of extraction and extraction liquid electrodeposition after agitation leaching is adopted for recovery, wherein the recovery rate of copper sulfide is low; the bacteria heap leaching is adopted for extraction, and then the electrowinning wet smelting process method is adopted for recovery, the production period is as long as 6 months or even years, and the leaching recovery rate is unstable; the processes of agitation leaching, leached slag flotation, leachate extraction and electrodeposition are adopted, solid-liquid separation equipment is needed for leaching tailings, the continuity and stability of the ore pulp supplied for flotation are poor, the flotation fluctuation is large, and the operation is not easy in industrial production.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a method for sorting mixed ores of copper oxide and copper sulfide, which can obtain copper sulfide concentrates and copper oxide ore concentrates with higher grade and recovery rate, improve the adaptability of products, save investment and production cost, have reasonable flow and high recovery rate, and can be applied to industrial production.
The method for sorting the copper oxide and copper sulfide mixed ore comprises the following steps:
s1 grinding ore
Grinding the mixed ore of copper oxide and copper sulfide to a fineness of 60-70% below 0.074mm by wet grinding;
s2 roughing copper sulfide ore
Adding a regulator, a collecting agent and a foaming agent for copper sulfide ore flotation into the ore pulp obtained in the step S1, and performing air flotation to obtain copper sulfide rough concentrate and rough tailings;
s3, refining the copper sulfide rough concentrate after regrinding
Grinding the rough copper sulfide concentrate obtained in the step S2, and performing air flotation to obtain copper sulfide concentrate;
s4 roughing of copper oxide ore
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent of the copper oxide ore into the roughed copper sulfide tailings obtained in the step S2, and performing air flotation to obtain rough copper oxide concentrate;
s5 refining copper oxide ore
And (4) adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate obtained in the step (S4) to perform air flotation to obtain copper oxide concentrate and concentration tailings, and performing scavenging on the concentration tailings to obtain tailings output.
The embodiment of the invention has the advantages and technical effects brought by the independent claims: 1. in step S1, for the mud-containing mixed ore in which copper oxide ore and copper sulfide ore exist in the form of fine particles, in order to reduce the influence of fine mud, the mixed ore of copper oxide ore and copper sulfide ore is coarsely ground to a fineness of 60-70% below 0.074mm, and a sorting process of flotation of copper oxide ore by flotation and re-sulfidation is adopted. If the copper sulfide ore obtains higher dissociation degree through fine grinding in the roughing section of flotation, the copper oxide ore is over-ground in the fine grinding process, fine particles are too much after grinding, and the size fraction minerals below 0.010mm are increased, so that the amount of fine mud is increased, the flotation environment of ore pulp is deteriorated, and the quality and the recovery rate of flotation concentrates of the copper oxide and the copper sulfide are reduced due to the existence of the fine mud. The mixed ore of copper oxide and copper sulfide is coarsely ground to the fineness of 60-70% below the grade of 0.074mm, the copper oxide ore is prevented from being excessively ground and excessive fine mud is prevented, the floatability of copper sulfide is good, the copper sulfide can be adsorbed by a flotation reagent and floats upwards along with bubbles as long as the exposed copper sulfide surface is exposed after the ore is ground, copper sulfide rough concentrate is obtained through flotation, and the copper sulfide rough concentrate is finely ground again, so that the copper sulfide concentrate with high recovery rate and high grade is obtained, and the excessive grinding of the copper oxide ore is avoided. Adding a vulcanizing agent into the roughed tailings, and then adopting a collecting agent to float the copper oxide ore, so that the copper sulfide ore and the copper oxide ore are respectively floated and recovered, and copper sulfide concentrate and copper oxide concentrate are obtained; 2. in step S5, the copper oxide rough concentrate is concentrated to obtain copper oxide concentrate and concentrated tailings, and the concentrated tailings are further scavenged to obtain small tailings which are output and are no longer returned to the copper oxide rough concentration section as middlings, so that fine mud is discharged from the system, and the influence of the fine mud on the copper sulfide ore and copper oxide ore separation process is reduced. Although the coarse grinding of the copper sulfide and copper oxide mixed ore reduces the generation of fine mud, when the concentration is carried out on the copper sulfide coarse concentrate, partial fine mud is necessarily generated by regrinding, the concentration of the copper sulfide coarse concentrate can obtain copper sulfide concentrate and middlings containing the fine mud, the middlings still contain recoverable copper resources and need to be returned to a separation system, the fine mud in the middlings returns to the previous copper sulfide coarse separation section along with the system flow and then gradually enters the copper oxide coarse separation section, therefore, due to the entrainment effect of mineralization bubbles, partial fine mud also enters the copper oxide coarse concentrate along with the copper oxide coarse separation, the partial fine mud enters the concentration tailings after the copper oxide concentration, the concentration tailings are generally required to be returned to the copper oxide coarse separation section as the middlings, in order to prevent the partial fine mud from remaining in the system flow, the concentration tailings obtained in the copper oxide concentration section are subjected to the fine separation, the small tailings are obtained and are output and discharged out of the system, so that the part of fine mud is discharged in the form of tailings and does not exist in the system flow, the flotation environment of the copper oxide ore is optimized, and the grade and the recovery rate of the copper oxide ore are improved; 3. the method provided by the embodiment of the invention can obtain the copper sulfide concentrate and the copper oxide ore concentrate with higher grade and recovery rate, improves the product adaptability, saves the investment and production cost, has reasonable flow and high recovery rate, and can be applied to industrial production.
According to the method for sorting the copper oxide and copper sulfide mixed ore, the copper oxide ore and the copper sulfide mixed ore have an embedded particle size of more than 0.074mm of at least 70 percent; the copper sulphide ore has an embedded particle size of less than 0.020mm accounting for at least 60 percent.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S2, the adjusting agent is at least one of lime or sodium carbonate; the collector is selected from at least one of xanthate, Z-200, nigre and ester-105, and the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol. In the present example, Z-200 is ethylthiourethane, ester-105 is nitrilotriacetonitrile ester, and number 2 oil is ROH (R-alkyl).
According to the method for separating the copper oxide and copper sulfide mixed ore, in the step S2, the collector is a combined collector of butyl xanthate and Z-200, and the mass ratio of the butyl xanthate to the Z-200 is 3: 2.
According to the separation method of the copper oxide and copper sulfide mixed ore, in the step S2, the copper sulfide roughed tailings are subjected to 1-3 stages of scavenging to obtain copper sulfide flotation tailings.
According to the method for sorting the copper oxide and copper sulfide mixed ore, the step S3 comprises the following steps: grinding the rough copper sulfide concentrate to a size fraction of 70-90% below 0.074mm, and concentrating for 2-3 times to obtain copper sulfide concentrate.
According to the method for sorting the mixed ore of the copper oxide and the copper sulfide, in the step S4 or S5, the vulcanizing agent is selected from at least one of sodium sulfide or sodium hydrosulfide, the modifier is selected from at least one of ammonium carbonate, ammonium sulfate or ethylenediamine phosphate, the collector is selected from at least one of amyl xanthate, butyl xanthate or Z-200, and the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S4, two-stage roughing is adopted for roughing the copper oxide ore, and 1-3 stages of scavenging are carried out on roughing tailings.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S5, the copper oxide rough concentrate is concentrated for 1-3 times to obtain the copper oxide concentrate.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S5, the concentration tailings are subjected to 1-2 stages of scavenging, so that the tailings output is obtained.
Drawings
Fig. 1 is a process flow chart of a method for sorting a copper oxide and copper sulfide mixed ore according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, a method for sorting a copper oxide and copper sulfide mixed ore according to an embodiment of the present invention includes:
s1 grinding ore
Grinding the mixed ore of copper oxide and copper sulfide to a fineness of 60-70% below 0.074mm by wet grinding;
s2 roughing copper sulfide ore
Adding a regulator, a collecting agent and a foaming agent for copper sulfide ore flotation into the ore pulp obtained in the step S1, and performing air flotation to obtain copper sulfide rough concentrate and rough tailings;
s3, refining the copper sulfide rough concentrate after regrinding
Grinding the rough copper sulfide concentrate obtained in the step S2, and performing air flotation to obtain copper sulfide concentrate;
s4 roughing of copper oxide ore
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent of the copper oxide ore into the roughed copper sulfide tailings obtained in the step S2, and performing air flotation to obtain rough copper oxide concentrate;
s5: copper oxide ore beneficiation
And (4) adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate obtained in the step (S4) to perform air flotation to obtain copper oxide concentrate and concentration tailings, and performing scavenging on the concentration tailings to obtain tailings output.
According to the method for sorting the copper oxide and copper sulfide mixed ore provided by the embodiment of the invention, 1, in step S1, aiming at the mud-containing mixed ore in which the copper oxide ore and the copper sulfide ore exist in a micro-fine particle form, in order to reduce the influence of the fine mud, the copper oxide and copper sulfide mixed ore is subjected to coarse grinding and is ground to the fineness of 60-70% below the 0.074mm particle size, and a sorting process of flotation of copper oxide ore through preferential flotation and sulfidation flotation is adopted. If the copper sulfide ore obtains higher dissociation degree through fine grinding in the roughing section of flotation, the copper oxide ore is over-ground in the fine grinding process, fine particles are too much after grinding, and the size fraction minerals below 0.010mm are increased, so that the amount of fine mud is increased, the flotation environment of ore pulp is deteriorated, and the quality and the recovery rate of flotation concentrates of the copper oxide and the copper sulfide are reduced due to the existence of the fine mud. The mixed ore of copper oxide and copper sulfide is coarsely ground to the fineness of 60-70% below the grade of 0.074mm, the copper oxide ore is prevented from being excessively ground and excessive fine mud is prevented, the floatability of copper sulfide is good, the copper sulfide can be adsorbed by a flotation reagent and floats upwards along with bubbles as long as the exposed copper sulfide surface is exposed after the ore is ground, copper sulfide rough concentrate is obtained through flotation, and the copper sulfide rough concentrate is finely ground again, so that the copper sulfide concentrate with high recovery rate and high grade is obtained, and the excessive grinding of the copper oxide ore is avoided. Adding a vulcanizing agent into the roughed tailings, and then adopting a collecting agent to float the copper oxide ore, so that the copper sulfide ore and the copper oxide ore are respectively floated and recovered, and copper sulfide concentrate and copper oxide concentrate are obtained; 2. in step S5, the copper oxide rough concentrate is concentrated to obtain copper oxide concentrate and concentrated tailings, and the concentrated tailings are further scavenged to obtain small tailings which are output and are no longer returned to the copper oxide rough concentration section as middlings, so that fine mud is discharged from the system, and the influence of the fine mud on the copper sulfide ore and copper oxide ore separation process is reduced. Although the coarse grinding of the copper sulfide and copper oxide mixed ore reduces the generation of fine mud, when the concentration is carried out on the copper sulfide coarse concentrate, partial fine mud is necessarily generated by regrinding, the concentration of the copper sulfide coarse concentrate can obtain copper sulfide concentrate and middlings containing the fine mud, the middlings still contain recoverable copper resources and need to be returned to a separation system, the fine mud in the middlings returns to the previous copper sulfide coarse separation section along with the system flow and then gradually enters the copper oxide coarse separation section, therefore, due to the entrainment effect of mineralization bubbles, partial fine mud also enters the copper oxide coarse concentrate along with the copper oxide coarse separation, the partial fine mud enters the concentration tailings after the copper oxide concentration, the concentration tailings are generally required to be returned to the copper oxide coarse separation section as the middlings, in order to prevent the partial fine mud from remaining in the system flow, the concentration tailings obtained in the copper oxide concentration section are subjected to the fine separation, the small tailings are obtained and are output and discharged out of the system, so that the part of fine mud is discharged in the form of tailings and does not exist in the system flow, the flotation environment of the copper oxide ore is optimized, and the grade and the recovery rate of the copper oxide ore are improved; 3. the method provided by the embodiment of the invention can obtain the copper sulfide concentrate and the copper oxide ore concentrate with higher grade and recovery rate, improves the product adaptability, saves the investment and production cost, has reasonable flow and high recovery rate, and can be applied to industrial production.
According to the method for sorting the copper oxide and copper sulfide mixed ore, the copper oxide ore and the copper sulfide mixed ore have an embedded particle size of more than 0.074mm of at least 70 percent; the copper sulphide ore has an embedded particle size of less than 0.020mm accounting for at least 60 percent. For mixed ores of copper oxide ores and copper sulphide ores, the copper oxide ores mainly exist in the form of coarse-grained embedded malachite, and the embedded granularity is at least 70% of that of 0.074 mm; the copper sulphide ore exists in the form of primary copper sulphide and secondary copper sulphide ore embedded in micro-fine particles, and the embedded particle size of less than 0.020mm accounts for at least 60%. By adopting the method provided by the embodiment of the invention, the influence of fine mud can be effectively reduced for the mixed ore containing copper sulfide with fine embedded granularity, and the grade and recovery rate of copper sulfide concentrate and copper oxide concentrate are improved.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S2, the adjusting agent is at least one of lime or sodium carbonate; the collecting agent is selected from at least one of xanthate, Z-200, nigre and ester-105, preferably, the collecting agent is a combined collecting agent of butyl xanthate and Z-200, and the mass ratio of the butyl xanthate to the Z-200 is 3: 2; the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol; and carrying out 1-3 stages of scavenging on the copper sulfide rougher tailings to obtain copper sulfide flotation tailings. In the method of the embodiment of the invention, step S2 adopts the regulator, the collector and the foaming agent of copper sulfide ore flotation for flotation to perform flotation, so as to obtain copper sulfide rough concentrate and copper sulfide rough tailings, preferably, the copper sulfide rough tailings are further scavenged to obtain tailings, and the tailings are sent to a subsequent copper oxide rough concentration section, so that the grade and the recovery rate of copper sulfide and copper oxide concentrate can be further improved. In the embodiment of the invention, the preferable collecting agent adopts the combined collecting agent of butyl xanthate and Z-200 in a mass ratio of 3:2, so that the recovery rate of copper sulfide concentrate can be improved.
According to the method for sorting the copper oxide and copper sulfide mixed ore, the step S3 comprises the following steps: grinding the rough copper sulfide concentrate to a size fraction of 70-90% below 0.074mm, and concentrating for 2-3 times to obtain copper sulfide concentrate. In the embodiment of the invention, the copper sulfide rough concentrate obtained in the step S2 is finely ground and then is finely concentrated to obtain the copper sulfide concentrate with high grade and recovery rate.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S4, two-section roughing is adopted for roughing the copper oxide ore, and 1-3 sections of scavenging are carried out on roughing tailings; the vulcanizing agent is selected from at least one of sodium sulfide or sodium hydrosulfide, the modifier is selected from at least one of ammonium carbonate, ammonium sulfate or ethylenediamine phosphate, the collector is selected from at least one of amyl xanthate, butyl xanthate or Z-200, the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol, and furthermore, dispersant water glass can be added to reduce the influence of fine mud, and the adding amount is generally 300-500 g/ton ore. In step S4, reagents such as a vulcanizing agent, a regulator, a collecting agent, a foaming agent and the like are added to the tailings obtained by the rough concentration in step 2 to perform rough concentration on copper oxide ore, preferably two-stage rough concentration is performed, so that the vulcanizing effect of the vulcanizing agent on the copper oxide ore is enhanced, the vulcanizing time of the vulcanizing agent is prolonged, the acting concentration of the vulcanizing agent and the copper oxide ore is enhanced, and the recovery rate of copper oxide concentrate is improved.
According to the method for sorting the copper oxide and copper sulfide mixed ore, in the step S5, the copper oxide rough concentrate is concentrated for 1-3 times to obtain a copper oxide concentrate; carrying out 1-2-section scavenging on the selected tailings to obtain tailings output; the vulcanizing agent is selected from at least one of sodium sulfide or sodium hydrosulfide, the modifier is selected from at least one of ammonium carbonate, ammonium sulfate or ethylenediamine phosphate, the collector is selected from at least one of amyl xanthate, butyl xanthate or Z-200, the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol, and further, a dispersant water glass can be added. In step S5 of the embodiment of the present invention, reagents such as a sulfidizing agent, a modifier, a collector, and a foaming agent are added to the copper oxide rough concentrate obtained in step S4 to perform concentration of the copper oxide rough concentrate, so as to obtain a copper oxide concentrate, and the concentrated tailings are scavenged to obtain tailings, so that the tailings are produced, the influence of fine mud on a separation system is reduced, and the grade and recovery rate of the copper oxide concentrate are improved.
A specific embodiment of the present invention is described below with reference to fig. 1.
Example 1
S1 Ore grinding
The Cu grade of a certain mixed ore of copper sulfide ore and copper oxide ore is 2.0%, wherein the copper sulfide ore accounts for 60%, the copper oxide ore accounts for 40%, the copper sulfide exists in a micro-fine particle form, the embedded particle size of the copper oxide ore is more than 0.074mm and accounts for 70%, and the embedded particle size of the copper sulfide ore is less than 0.020mm and accounts for 60%. And (3) coarse grinding the mixed ore of the copper sulfide ore and the copper oxide ore until the mixed ore is less than 0.074mm and accounts for 70 percent of fineness.
S2 copper sulfide ore roughing
Adding a collecting agent, a regulator and a foaming agent into ore pulp to perform copper sulfide ore flotation, taking butyl xanthate as a copper sulfide collecting agent, taking the dosage of a roughing section as 100g/t (in the embodiment of the invention, the dosage of medicaments is calculated by each ton of ore, the dosage is the same below), taking lime as a regulator, taking the dosage of a roughing section as 500g/t, taking No. 2 oil as a foaming agent, taking the dosage of a roughing section as 40g/t, adopting one-section roughing and two-section scavenging for copper sulfide ore flotation, and sequentially reducing the dosage of medicaments in the scavenging section by half on the basis of the roughing section to obtain copper sulfide rough concentrate and copper sulfide flotation tailings.
S3 copper sulfide rough concentrate concentration
And (3) regrinding the copper sulfide rough concentrate to a fineness of less than 0.074mm and accounting for 85 percent, and carrying out three-stage concentration to obtain the copper sulfide concentrate.
S4 copper oxide ore roughing
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper sulfide flotation tailings obtained in the step S2 to perform copper oxide ore flotation, wherein the dosages of two sections of rough flotation are the same, sodium hydrosulfide is used as the vulcanizing agent, the dosage of each section of rough flotation is 400g/t, ammonium sulfate is used as the regulator, the dosage of each section of rough flotation is 400g/t, pentylxanthene is used as the collecting agent after copper oxide vulcanization, the dosage of each section of rough flotation is 80g/t, No. 2 oil is used as the foaming agent, the dosage of each section of rough flotation is 30g/t, two sections of rough flotation and two sections of scavenging are adopted, and the dosages of scavenging section medicaments are reduced by half in sequence on the basis of the second section of rough flotation to obtain copper oxide rough concentrates and copper oxide flotation tailings 1.
S5 copper oxide ore concentration
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate to carry out copper oxide ore concentration, taking sodium hydrosulfide as the vulcanizing agent with the dosage of 100g/t, ammonium sulfate as the regulator with the dosage of 100g/t, amyl xanthate as the collecting agent with the dosage of 40g/t, No. 2 oil as the foaming agent with the dosage of 20g/t, obtaining copper oxide concentrate by adopting one-stage concentration, carrying out two-stage scavenging on the concentrated tailings obtained after the one-stage concentration to produce tailings 2, and discharging the tailings out of a separation system.
By adopting the method of the embodiment, the copper sulfide concentrate and the copper oxide concentrate can be respectively obtained, the copper grade of the copper sulfide concentrate is 35.26%, the copper recovery rate is 56.41%, the copper grade of the copper oxide concentrate is 17.37%, the copper recovery rate is 34.12%, and the total copper recovery rate is 90.53%.
Example 2
S1 Ore grinding
The Cu grade of a certain mixed ore of copper sulfide ore and copper oxide ore is 1.5%, wherein the copper sulfide ore accounts for 70%, the copper oxide ore accounts for 30%, the copper sulfide exists in a micro-fine particle form, the embedded particle size of the copper oxide ore is more than 0.074mm and accounts for 70%, and the embedded particle size of the copper sulfide ore is less than 0.020mm and accounts for 60%. And (3) coarse grinding the mixed ore of the copper sulfide ore and the copper oxide ore until the mixed ore is less than 0.074mm and accounts for 65 percent of fineness.
S2 copper sulfide ore roughing
Adding a collecting agent, a regulator and a foaming agent into the ore pulp to perform copper sulfide ore flotation, taking a combined reagent of butyl xanthate and Z-200 as a copper sulfide collecting agent, using 60g of butyl xanthate +40g Z-200/t as roughing, using lime as a regulator, using 500g/t in a roughing section, using methyl isobutyl carbinol as a foaming agent, using 60g/t in roughing, adopting one-section roughing and two-section scavenging for copper sulfide ore flotation, and sequentially reducing the reagent usage in a scavenging section by half on the basis of the roughing section to obtain copper sulfide rough concentrate and copper sulfide flotation tailings.
S3 copper sulfide rough concentrate concentration
And (3) regrinding the copper sulfide rough concentrate to a fineness of less than 0.074mm and accounting for 90 percent, and carrying out three-stage concentration to obtain the copper sulfide concentrate.
S4 copper oxide ore roughing
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper sulfide flotation tailings obtained in the step S2 to perform copper oxide ore flotation, wherein the dosages of two sections of rough flotation are the same, sodium sulfide is used as the vulcanizing agent, the dosage of each section of rough flotation is 300g/t, ammonium sulfate is used as the regulator, the dosage of each section of rough flotation is 400g/t, pentylxanthene is used as the collecting agent after copper oxide vulcanization, the dosage of each section of rough flotation is 80g/t, methyl isobutyl carbinol is used as the foaming agent, the dosage of each section of rough flotation is 40g/t, two sections of rough flotation and two sections of scavenging are adopted, and the dosages of scavenging section medicaments are reduced by half in sequence on the basis of the second section of rough flotation to obtain copper oxide rough concentrates and copper oxide flotation tailings 1.
S5 copper oxide ore concentration
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate to carry out copper oxide ore concentration, taking sodium hydrosulfide as the vulcanizing agent with the dosage of 100g/t, ammonium sulfate as the regulator with the dosage of 100g/t, amyl xanthate as the collecting agent with the dosage of 40g/t, No. 2 oil as the foaming agent with the dosage of 20g/t, obtaining copper oxide concentrate by adopting one-stage concentration, carrying out two-stage scavenging on the concentrated tailings obtained after the one-stage concentration to produce tailings 2, and discharging the tailings out of a separation system.
By adopting the method of the embodiment, the copper sulfide concentrate and the copper oxide concentrate can be respectively obtained, the copper grade of the copper sulfide concentrate is 35.34%, the copper recovery rate is 67.67%, the copper grade of the copper oxide concentrate is 16.37%, the copper recovery rate is 24.12%, and the total copper recovery rate is 91.79%.
Comparative example 1
Comparative example 1 is the same as the method of example 1 except that in step S1, the mixed ore of copper sulfide ore and copper oxide ore is coarsely ground to a fineness of 80% or less of 0.074 mm.
The copper sulfide concentrate obtained by the method of comparative example 1 had a copper grade of 35.68%, a copper recovery of 57.24%, a copper oxide concentrate had a copper grade of 14.47%, a copper recovery of 28.17%, and an overall copper recovery of 85.41%.
Comparative example 2
Comparative example 2 is the same as the method of example 1 except that in step S1, the mixed ore of copper sulfide ore and copper oxide ore is coarsely ground to a fineness of 90% or less of 0.074 mm.
The copper sulfide concentrate obtained by the method of comparative example 2 had a copper grade of 35.79%, a copper recovery of 56.31%, a copper oxide concentrate having a copper grade of 13.51%, a copper recovery of 24.93%, and an overall copper recovery of 81.24%.
Comparative example 3
Comparative example 2 the same process as in example 1, except that in step S5, the concentration tailings obtained from the first stage concentration of the copper oxide rough concentrate are not scavenged to discharge tailings 2, but the concentration tailings obtained from the first stage concentration are returned to the first stage copper oxide ore rough concentration stage.
The copper sulfide concentrate obtained by the method of comparative example 3 had a copper grade of 35.16%, a copper recovery of 55.86%, a copper oxide concentrate having a copper grade of 9.30%, a copper recovery of 18.95%, and a total copper recovery of 74.81%.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for sorting mixed ore of copper oxide and copper sulfide is characterized by comprising the following steps:
s1 grinding ore
Grinding the mixed ore of copper oxide and copper sulfide to a fineness of 60-70% below 0.074mm by wet grinding;
s2 roughing copper sulfide ore
Adding a regulator, a collecting agent and a foaming agent for copper sulfide ore flotation into the ore pulp obtained in the step S1, and performing air flotation to obtain copper sulfide rough concentrate and rough tailings;
s3, refining the copper sulfide rough concentrate after regrinding
Grinding the rough copper sulfide concentrate obtained in the step S2, and performing air flotation to obtain copper sulfide concentrate;
s4 roughing of copper oxide ore
Adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent of the copper oxide ore into the roughed copper sulfide tailings obtained in the step S2, and performing air flotation to obtain rough copper oxide concentrate;
s5 refining copper oxide ore
And (4) adding a vulcanizing agent, a regulator, a collecting agent and a foaming agent into the copper oxide rough concentrate obtained in the step (S4) to perform air flotation to obtain copper oxide concentrate and concentration tailings, and performing scavenging on the concentration tailings to obtain tailings output.
2. The method for sorting the mixed ore of copper oxide and copper sulfide according to claim 1, wherein the mixed ore of copper oxide and copper sulfide has a copper oxide ore embedded particle size >0.074mm of at least 70%; the copper sulphide ore has an embedded particle size of less than 0.020mm accounting for at least 60 percent.
3. The method for sorting the mixed ore of copper oxide and copper sulfide according to claim 1, wherein in the step S2, the modifier is at least one selected from lime and sodium carbonate; the collector is selected from at least one of xanthate, Z-200, nigre and ester-105, and the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol.
4. The method for separating the copper oxide and copper sulfide mixed ore according to claim 3, wherein in the step S2, the collector is a combined collector of butyl xanthate and Z-200, and the mass ratio of the butyl xanthate to the Z-200 is 3: 2.
5. The method for separating the copper oxide and copper sulfide mixed ore according to claim 1, wherein in the step S2, the copper sulfide rougher tailings are subjected to 1-3 stages of scavenging to obtain copper sulfide flotation tailings.
6. The method for sorting the copper oxide and copper sulfide mixed ore according to claim 1, wherein the step S3 includes: grinding the rough copper sulfide concentrate to a size fraction of 70-90% below 0.074mm, and concentrating for 2-3 times to obtain copper sulfide concentrate.
7. The method for sorting the mixed ore of copper oxide and copper sulfide as claimed in claim 1, wherein in the step S4 or S5, the sulfidizing agent is selected from at least one of sodium sulfide or sodium hydrosulfide, the conditioning agent is selected from at least one of ammonium carbonate, ammonium sulfate or ethylenediamine phosphate, the collecting agent is selected from at least one of amyl xanthate, butyl xanthate or Z-200, and the foaming agent is selected from at least one of No. 2 oil or methyl isobutyl carbinol.
8. The method for separating the copper oxide and copper sulfide mixed ore according to claim 1, wherein in the step S4, the copper oxide ore is roughed by adopting two-stage rougher flotation, and rougher tailings are scavenged by 1-3 stages.
9. The method for sorting the mixed ore of copper oxide and copper sulfide according to claim 1, wherein in the step S5, the rough copper oxide concentrate is concentrated 1-3 times to obtain a copper oxide concentrate.
10. The method for separating the copper oxide and copper sulfide mixed ore according to the claim 1, wherein in the step S5, the concentration tailings are subjected to 1-2 stages of scavenging to obtain tailings output.
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