CN115228598A

CN115228598A - Intensive and efficient separation method for porphyry type copper ores

Info

Publication number: CN115228598A
Application number: CN202210726288.5A
Authority: CN
Inventors: 鲁军; 赖桂华; 黄晟; 丘晓斌; 徐先龙; 邓莉莉; 方娴
Original assignee: Zijin Mining Group Co Ltd
Current assignee: Zijin Mining Group Co Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-10-25

Abstract

A method for intensively and efficiently sorting porphyry type copper ores aims at the current situation that the properties of the porphyry type copper ores are greatly different due to different ore bodies, ore sections and formation reasons, ore dressing processes and conditions which are suitable for the property change of the ores are selected and combined, and corresponding treatment processes are adopted respectively according to different grades of the ores for economic extraction and recovery.

Description

Intensive and efficient separation method for porphyry type copper ore

Technical Field

The invention relates to the technical field of copper deposit dressing and smelting processing and comprehensive utilization, in particular to an intensive and efficient separation method for porphyry type copper ores.

Background

Due to the different grades of the porphyry type copper ores, the industrial processing methods are also different. The traditional separation mode is adopted, and the requirement on the stability of the properties of the selected copper ores is high. In the actual production process, the properties of copper ores cannot completely enter a dressing plant according to a theoretical mode, the copper ores entering the process flow can generate a segmentation phenomenon, the copper grade and the oxidation rate change, and the phenomenon of overlarge property difference of the copper ores can be caused, so that the technical indexes are easy to fluctuate due to different process conditions required by dressing, and the copper ores produced by a stope are generally stacked independently in a storage yard according to the copper grade, then are subjected to ore blending according to a certain proportion through the copper grade, and finally are subjected to flotation production. However, for copper ore beneficiation with different mining modes, a plurality of ore removal points and large mineralization or grade difference, fine ore blending and production are difficult to achieve, and furthermore, if a mine does not have an ore blending site, ore removal from a stope can only be directly fed into a dressing plant, the dressing plant has large fluctuation of production indexes due to large fluctuation of ore supply, the selected copper grade and the mineralization cannot be effectively controlled, and the loss of metal in tailings is increased, so that resource waste is caused. Even if the mine has site conditions for ore blending, auxiliary facilities such as an ore blending site and an ore bin need to be built, so that the construction and operation costs are high, and some mines are difficult to bear. Taking a certain oversize rocky rock type copper mine in Fujian province as an example, an ore dressing plant adopts open-air and underground combined mining for ore supply, wherein the underground mining mainly supplies high-grade copper mine, the open mining supplies medium-low grade copper mine and epitopic ore, clay type minerals in an open mining deposit or ores which are agglomerated by the clay and are weathered into fine particles have high proportion, and the open mining and the underground mining have difference in mining performance. If the mine is limited by the site, the ore preparation site is difficult to plan, and if a solution cannot be found, stable production cannot be carried out.

In conclusion, according to the property and grade of the copper ore, a classification recovery scheme which is reliable in technology, economical and feasible is developed, production organization is facilitated to be optimized, accurate process management and control are facilitated to be achieved, the problem of concentrated ore blending difficulty is solved, and mineral resources are utilized efficiently. The same technical scheme as the invention (intensive and efficient separation method based on joint mining of the grade and the mineralogy division of the porphyry type copper ore) is not detected by the subject group on the intellectual property network of the people's republic of China and the cross-database and the Uygur information retrieval.

Therefore, the development of an intensive and efficient separation method for porphyry type copper ores is particularly urgent.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an intensive and efficient separation method for porphyry type copper ores, which classifies high-grade and medium-grade copper ores and low-grade epi-ores according to the specified technical standards of separation and metallurgy and can furthest improve the intensification degree of development and utilization of mineral resources.

The task of the invention is completed by the following technical scheme:

a method for intensively and efficiently sorting porphyry type copper ores is characterized by comprising the steps of selecting and combining ore dressing processes and conditions which are suitable for changes of ore properties (viscosity, humidity, granularity and mud content) according to the current situation that the ore properties of the porphyry type copper ores are greatly different due to different ore bodies, ore sections and formation reasons, and respectively adopting corresponding treatment processes to economically extract and recover according to different grades of the ores.

Compared with the prior art, the invention has the following advantages or effects:

(1) The independent planning and construction of a ore blending site and facilities are not needed, and the desliming and ore washing operation is not needed to be additionally configured, so that the process flow is simplified, and a large amount of construction investment can be saved.

(2) The method is favorable for optimizing production organization, can perform accurate process control, and has stable production index and high comprehensive recovery rate.

(3) The medium-grade and high-grade ores are subjected to flotation, and the low-grade out-of-surface ores are subjected to dump leaching, so that the selected boundary grade of copper ores is reduced, the existing resources can be greatly utilized, and the unit ore treatment cost is reduced.

(4) The recovery rate of copper ore dressing is more than 90%, the ore dressing cost is less than 60 yuan/ton ore, the wet leaching rate is more than 70%, the wet ton copper cost is less than 19000 yuan, the ore dressing cost per ton ore is less than 90 yuan, and the comprehensive ore dressing cost is less than 100 yuan/ton ore.

The percentages referred to herein are percentages by mass. The low-grade ore contains 0.15 to 0.3 percent of Cu, the medium-grade ore contains 0.3 to 0.6 percent of Cu, and the high-grade ore contains Cu>0.6 percent of low-grade refractory stone containing 0.05 to 0.1 percent of Cu, 0.6 to 1.0 percent of high-grade refractory stone containing Cu, 20 to 23 percent of copper concentrate containing Cu, 46 to 48 percent of sulfur concentrate containing S, and Cu-containing flotation tailings<0.03% and the high copper raffinate contains Cu ²⁺ 300-600 mg/L, low copper raffinate containing Cu ²⁺ Less than 80mg/L, and the leaching pregnant solution contains Cu ²⁺ 1.3-1.8 g/L, and the electric pregnant solution after back extraction contains Cu ²⁺ 40-50 g/L1 # standard cathode copper containing Cu>99.95 percent. The related medicament ZJ-0# is an extracting agent which is self-developed and named by the applicant, is a dark brown viscous liquid mixture of an aldoxime extracting agent and a ketoxime extracting agent with the volume ratio of 1:2, and has the maximum load capacity of 0.52g/L and the density of 0.98; MIBC is methyl isobutyl carbinol; y89 is a high-efficiency collecting agent of methyl isoamyl xanthate isomerate Huang Yaolei; MA is a domestic novel efficient synthetic collecting agent, is light yellow, is a powdery solid, is very easy to dissolve in water, is light yellow in aqueous solution, is clear and transparent, has no precipitate, and has good collecting performance on gold, silver, copper and other minerals.

Drawings

FIG. 1 is a schematic process flow diagram of an intensive and efficient separation method for porphyry copper ores according to the invention.

In the drawings, the reference symbols respectively denote:

A.pH regulator B.sulfide ore collector C.foaming agent D.limestone powder E.extractant F.additive G.neutralizer

The description is further described in detail below with reference to the following drawings.

Detailed Description

As shown in figure 1, the intensive and efficient separation method for porphyry copper ores is characterized by comprising the steps of performing ore discharging through a mine, performing open mining on middle-grade ores through rough crushing, semi-autogenous grinding, ball milling, intelligent refractory ore preselection and separation, blowing ores, preferentially selecting copper and then sulfur, and performing two-stage dehydration process on middle-grade ores through treatment of open mining, performing ground mining on high-grade ores and high-grade refractory ores through three-stage closed-circuit crushing, one-stage closed-circuit ball milling, preferentially selecting copper and then sulfur, and performing two-stage dehydration process on low-grade ores and low-grade ores, and performing treatment through a full-grade copper extraction process of biological leaching, extraction and electrowinning, so that the overall efficient separation method for porphyry copper ores can efficiently collect copper concentrates and cathode concentrates and can efficiently produce copper concentrates through the comprehensive wet method of extracting copper concentrates through the steps of extracting, extracting and electrowinning.

The process of the invention may further be

The method comprises the following specific steps and conditions:

A. and (4) separating high-grade ore and high-grade hard rock. The ground mining high-grade ore is drawn through the ore chute, and the coarse crushing is carried out through the jaw crusher in the crushing chamber of ore chute below again, and the coarse crushing ore passes through belt transport to the earth's surface, adopts cone crusher to carry out the well bits of broken glass, and well bits of broken glass ore carries to the shale shaker through the belt and sieves in advance: -12mm ore is transported to a powder ore bin through a belt, the +12mm ore is transported to a cone crusher through a belt to be finely crushed, the finely crushed cone crusher and a vibrating screen form a closed configuration, the finely crushed ore is transported to the vibrating screen through a belt to be inspected and screened, the-12 mm ore and quicklime (A) are fed into two series of ore grinding grading loops consisting of a ball mill and a hydrocyclone, settled sand of the hydrocyclone returns to the ball mill to be ground, overflow of which the proportion is 58-62% of that of 0.074mm enters a stirring barrel to be stirred and mixed, sulfide ore collecting agent (B) and foaming agent (C) are sequentially added to be mixed, then the mixture enters a first copper flotation and then sulfur flotation loop to be floated, the pH value of the copper roughing pulp is kept to be 10.0-10.5, the pH value of the copper concentrating pulp is 12.0-12.5, copper concentrate ore pulp and sulfur concentrate pulp generated by the loop are subjected to concentration, filter cakes are subjected to external pinning after being concentrated and filtered, tailings are pumped into a hydraulic concentration bin, the concentrate ore pulp enters a thickener to be graded, the thickener to be filled into a full-concentration well for filling, and a full-concentration tailing, and a high-efficiency tailing stacking underflow is fed into a tailing series of a tailing to be merged through a tailing pile-up and a high-concentration tailing, and a tailing is carried out;

B. and (4) separating medium-grade ore in open mining. Ore drawing is carried out on the dew mining medium-grade ore through a chute, coarse crushing is carried out through a jaw crusher in a crushing chamber below the chute, the coarse crushing ore is controlled to be less than 250mm in ore discharge granularity, the coarse crushing ore is conveyed to a semi-autogenous mill and a vibrating screen process through a belt, and ore discharge of a semi-autogenous mill is graded through a double-layer linear vibrating screen: after deironing is carried out on the obstinate on the sieve with the diameter of +20mm by a magnetic roller, intelligent pre-separation and ore blowing are carried out, the pre-separated low-grade obstinate is supplied to a wet-method storage yard for leaching, and the high-grade obstinate is supplied to a series of conical fine crushing processes for subsequent treatment; feeding minus 20mm linear sieve undersize products and pH value regulator (A) quicklime into a ball mill and a hydrocyclone process, returning rotational flow settled sand to the ball mill, stirring and mixing rotational flow overflow, adding sulfide collector (B) and foaming agent (C) in sequence for mixing to obtain 58-62% fineness of minus 0.074mm, keeping the pH value of copper rougher pulp at 9.5-10.0, and the pH value of copper cleaner pulp at 11.5-12.0, feeding into a preferential copper flotation and sulfur re-flotation loop for flotation, pumping copper cleaner pulp and sulfur cleaner pulp generated by the loop to a high-efficiency thickener for concentration, and conveying underflow to a tailing pond for stockpiling through a pump;

C. and (4) separating low-grade ore and low-grade hard rock. Ore drawing of low-grade ore through a mine shaft, conveying to a gyratory crusher arranged on the ground surface through an electric locomotive for coarse crushing, feeding the coarse crushed ore into a double-layer vibrating screen, feeding materials on the screen into a cone crusher for intermediate crushing, conveying the intermediate crushed ore and materials under the vibrating screen to a storage yard through an automobile, simultaneously stacking low-grade obstinate and limestone powder (D) according to the proportion of 1-2% of the ore amount, spraying and leaching the heaped ore by using a pump to spray a spray liquid containing acid, iron and microorganism or copper-containing acidic pit water, controlling the pH of a leaching solution to be 1.6-1.8, controlling the potential to be 550-600 mv, controlling the total iron concentration TFe to be 8-10G/L, and extracting, washing and back-extracting the leaching rich liquid, respectively adding sulfuric acid (the dosage of the sulfuric acid is 550-600 kg/ton copper), an extracting agent (E) and kerosene (the dosage of the kerosene is 20-23 kg/ton copper), wherein an extraction system is divided into two series, namely, high copper raffinate after primary extraction is returned to a spray liquid pool for heap leaching, low copper raffinate obtained by two-stage series extraction connected in parallel is sent to a neutralization tank after oil separation treatment, a neutralizing agent (G) quicklime is added for neutralization reaction and then is concentrated, the overflow pH value is 6.5-8.5 and is discharged after reaching the standard, underflow is concentrated and filter-pressed by a paste body to form neutralized slag filter cake, the neutralized slag filter cake is transported to a neutralized slag bank for heap storage, electric rich liquid after back extraction is subjected to oil removal and iron reduction and then enters an accumulation tank, an additive (F) is added for conventional electrodeposition, and the standard cathode copper of No. 1 is produced.

The dosage of the pH value regulator (A) quicklime is 1500-1800 g/ton ore.

The usage amount of the sulfide ore collecting agent (B) is 40-46 g/ton of ammonium butryate, 10-14 g/ton of butyl xanthate, 4-6 g/ton of Y89 and 4-6 g/ton of MA.

The dosage of the foaming agent (C) is MIBC 8-10 g/ton ore.

The dosage of the extractant (E) ZJ-0# is 3-3.5 kg/ton copper.

The additive (F) is 0.85-0.90 kg of cobalt sulfate per ton of copper, 0.08-0.10 kg of guar gum per ton of copper and 0.145-0.150 kg of coal per ton of copper.

The dosage of the neutralizer (G) quicklime is 7-9 kg/ton copper.

And B, pumping the overflow water and the filtered water of the thickener in the steps A and B to a high-level water tank for recycling.

And D, the specification of the upper layer screen mesh of the double-layer vibrating screen in the step C is 45mm multiplied by 60mm, and the specification of the lower layer screen mesh is 12.5mm multiplied by 33mm.

And C, simultaneously stacking the low-grade hard rock obtained in the step C and limestone powder (D) which is mixed in according to the proportion of 1-2% of the ore amount.

6. Detailed description of the preferred embodiments

The copper mine in Fujian province is porphyry type copper mine, and adopts open-pit and underground combined mining, and the process flow implementation mode of the invention is shown in figure 1.

Example 1

The method comprises the following steps that ground mining high-grade ore is transferred to a chute, a jaw crusher is adopted in a crushing chamber below the chute for coarse crushing, coarse crushing products are conveyed to the ground surface through a belt and are subjected to intermediate crushing through a cone crusher, the intermediate crushing products are conveyed to a vibrating screen through the belt and are pre-screened, wherein-12 mm products are conveyed to a powder bin through the belt, and +12mm ore is conveyed to the cone crusher through the belt and is subjected to fine crushing. The fine crushed products are conveyed to a vibrating screen through a belt for inspection and screening, the products with the diameter of-12 mm are conveyed to a powder ore bin through the belt, the ores with the diameter of +12mm are conveyed to a cone crusher through the belt for fine crushing again, and the fine crushing cone crusher and the vibrating screen form a closed circuit configuration. -12mm ore and a pH value regulator are fed into two series of ore grinding grading loops consisting of a ball mill and a swirler, the sand setting of the hydrocyclone automatically flows back to the ball mill for regrinding, the overflow of the hydrocyclone with the thickness of 0.074mm accounting for 58% of the total thickness of the ore and the pH value regulator automatically flows into a stirring barrel for stirring and size mixing, a sulfide ore collecting agent and a foaming agent are sequentially added for size mixing, then the obtained mixture enters a preferential copper flotation and sulfur re-flotation loop for flotation, the pH value of copper roughing pulp is kept to be 10.12, the pH value of copper roughing pulp is kept to be 12.20, and copper concentrate and sulfur concentrate pulp generated by the loop are thickened and filtered, and a filter cake of the sulfur concentrate contains about 8% of water and is subjected to external marketing. The tailings in the loop are pumped into a tailing hydrocyclone for concentration and grading, the underflow of the hydrocyclone after the settled sand enters a thickener for secondary concentration is pumped to a filling station for underground filling, the overflow of the hydrocyclone is combined with a series of full tailings and then fed into a high-efficiency thickener for concentration, and the underflow is conveyed to a tailing pond for stockpiling through a pump. The overflow water and the filtered water of the thickener are pumped to a high-level water tank for recycling. Ore drawing is conducted on the middle-grade ore in the open mining through a sliding mine, coarse crushing is conducted on the middle-grade ore through a jaw crusher arranged in a crushing chamber below the middle-grade ore, the grain size of the coarse crushing product is controlled to be smaller than 250mm, the coarse crushing product is conveyed to a semi-autogenous grinding and vibrating screen process through a belt, ore discharging of a semi-autogenous grinding machine is classified through a double-layer linear vibrating screen, after iron is removed from sieve with the size of 20mm through a magnetic drum, intelligent pre-selection separation and ore blowing are conducted, pre-selected low-grade hard stones are supplied to a wet-process storage yard to be leached, and high-grade hard stones are supplied to a series of conical fine crushing processes to be subjected to subsequent treatment. Feeding minus 20mm linear sieve undersize products and a pH value regulator into a ball mill and a hydrocyclone flow, returning the settled sand of the hydrocyclone to the ball mill, stirring and mixing the overflow of the hydrocyclone, adding a sulfide ore collecting agent and a foaming agent in sequence for mixing, wherein the fineness is-0.074 mm and accounts for 62%, the copper roughing pH value is 9.69, the copper refining pH value is 11.55, feeding the mixture into a preferential copper flotation and re-sulfur flotation loop for flotation, and carrying out external rejection on copper concentrate, sulfur concentrate pulp generated by the loop after being thickened and filtered and the water content of the sulfur concentrate is about 8%. The flotation tailings are pumped to a high-efficiency thickener for concentration, and the underflow is conveyed to a tailing pond for stockpiling through a pump. The overflow water and the filtered water of the thickener are pumped to the high-level tank by the backwater pump for recycling. Ore drawing of low-grade ore from a ore pass, conveying the low-grade ore to a gyratory crusher arranged on the ground surface through an electric locomotive for coarse crushing, feeding the coarse crushed product into a double-layer vibrating screen (an upper screen is 45mm multiplied by 60mm, a lower screen is 12.5mm multiplied by 33 mm), feeding the material on the screen into a cone crusher for intermediate crushing, conveying the intermediate crushed product and the material under the vibrating screen to a storage yard through an automobile, simultaneously stacking the low-grade refractory stone and limestone powder which is mixed according to the proportion of 1.5 percent of the ore amount, spraying and leaching the stacked ore by using pump to spray and leach the spray liquor containing acid, iron and microorganism or copper-containing acidic pit water, controlling the acidity pH of the leaching liquor to be 1.67, the potential to be 550mv and the total Te concentration to be 8.11g/L, extracting, washing and back-extracting the obtained leaching rich liquor, wherein the sulfuric acid dosage is 570kg/t copper, the extractant dosage is 3.2kg/t copper, the kerosene dosage is 21kg/t copper dosage, and the extraction system comprises two strings, and the high-grade copper extraction raffinate returned to a stacking pool for leaching liquor; the low-copper raffinate after two-stage series extraction connected in parallel is sent to a neutralization tank after oil separation treatment, quicklime is added for reaction and then is concentrated, overflow treatment is discharged after reaching the standard, underflow is concentrated by paste and is subjected to filter pressing to form a neutralization slag filter cake, the neutralization slag filter cake is transported to a neutralization slag bank for stockpiling, electric rich liquid after back extraction is sent to the accumulation tank after oil removal and iron reduction, additives (0.87 kg/t copper of cobalt sulfate, 0.09kg/t copper of guar gum and 0.148kg/t copper of coal) are added for electrodeposition reaction, and finally cathode copper is produced. The detailed process conditions and the results of technical and economic indicators in example 1 of the present invention are shown in Table 1.

Example 2

The implementation steps are completely the same as those of the embodiment 1, the detailed process conditions and the technical and economic index results are shown in the table 2, and other process conditions which are not shown in the table 2 are consistent with those described in the text of the specific implementation mode of the embodiment 1.

Example 3

The implementation steps are completely the same as those of the embodiment 1 and the embodiment 2, the detailed process conditions and the technical and economic index results are shown in the table 3, and other process conditions which are not shown in the table 3 are consistent with those described in the embodiment mode of the embodiment 1.

As shown in tables 1, 2 and 3, the method has good separation effect and excellent economic benefit, is suitable for the classification and separation of different-grade copper ores and low-grade off-grade ores of the open-pit and underground combined mining porphyry copper ore, and realizes the economic and efficient recovery of the copper ore resources.

Table 1 results of example 1 of the invention

Table 2 results of example 2 of the invention

Table 3 results of example 3 of the invention

As can be seen from tables 1, 2 and 3, the method has good separation effect and excellent economic benefit, is suitable for classification and separation of different grades of copper ores and low-grade off-surface ores mined in combination in open and underground, and realizes economic and efficient recovery of copper ore resources.

As described above, the present invention can be preferably realized. The above embodiments are only preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent replacements within the protection scope of the present invention.

Claims

1. A method for intensively and efficiently sorting porphyry type copper ores is characterized by comprising the steps of selecting and combining ore dressing processes and conditions which are suitable for changes of ore properties (viscosity, humidity, granularity and mud content) according to the current situation that the ore properties of the porphyry type copper ores are greatly different due to different ore bodies, ore sections and formation reasons, and respectively adopting corresponding treatment processes to economically extract and recover according to different grades of the ores.

2. The method as claimed in claim 1, which comprises the following steps and conditions:

A. and (4) separating high-grade ore and high-grade hard rock. The ground mining high-grade ore is drawn through the ore chute, and the coarse crushing is carried out through the jaw crusher in the crushing chamber of ore chute below again, and the coarse crushing ore passes through belt transport to the earth's surface, adopts cone crusher to carry out the well bits of broken glass, and well bits of broken glass ore carries to the shale shaker through the belt and sieves in advance: conveying 12mm ore to a powder ore bin through a belt, conveying +12mm ore to a cone crusher through the belt for fine crushing, forming a closed configuration by a fine crushing cone machine and a vibrating screen, conveying the fine crushed ore to the vibrating screen through the belt for inspection and screening, feeding-12 mm ore and pH value regulator (A) quicklime into two series of ore grinding grading loops consisting of a ball mill and a hydraulic cyclone, returning settled sand of the hydraulic cyclone to the ball mill for regrinding, feeding 58-62% of overflow of 0.074mm ore into a stirring barrel for stirring and size mixing, sequentially adding a sulfide ore collecting agent (B) and a foaming agent (C) for size mixing, then feeding into a first copper flotation and second sulfur flotation loop for flotation, keeping the pH value of the copper roughing slurry between 10.0 and 10.5, and the pH value of the copper refining slurry between 12.0 and 12.5, pumping 8% of underflow of the copper concentrate and sulfur refining slurry generated by the loop into a hydraulic concentration loop, concentrating tailings, feeding the underflow into a thickening machine for concentration, pumping into a high-efficiency stacking and concentrating tailings, and then feeding the overflow into a tailing to be combined with a tailing stacking station for high-efficiency concentrating station;

B. and (4) separating the middle-grade ore in the open mining. Ore drawing of the dew mining medium-grade ore through a chute, coarse crushing through a jaw crusher in a crushing chamber below the chute, controlling the coarse crushing ore to be less than 250mm in ore discharge granularity, conveying to a semi-autogenous grinding and vibrating screen flow through a belt, and grading the ore discharge of a semi-autogenous grinding machine through a double-layer linear vibrating screen: after removing iron from the sieve-coated hard rock with the size of +20mm by a magnetic roller, carrying out intelligent pre-selection sorting and ore blowing, supplying the pre-sorted low-grade hard rock to a wet-process storage yard for leaching, and supplying the high-grade hard rock to a series of conical fine crushing processes for subsequent treatment; feeding minus 20mm linear sieve undersize products and pH value regulator (A) quicklime into a ball mill and a hydrocyclone process, returning rotational flow settled sand to the ball mill, stirring and mixing rotational flow overflow, adding sulfide collector (B) and foaming agent (C) in sequence for mixing to obtain 58-62% fineness of minus 0.074mm, keeping the pH value of copper rougher pulp at 9.5-10.0, and the pH value of copper cleaner pulp at 11.5-12.0, feeding into a preferential copper flotation and sulfur re-flotation loop for flotation, pumping copper cleaner pulp and sulfur cleaner pulp generated by the loop to a high-efficiency thickener for concentration, and conveying underflow to a tailing pond for stockpiling through a pump;

3. The method as set forth in claim 2, wherein the quicklime as the pH adjustor (A) is used in an amount of 1500 to 1800 g/ton of ore.

4. A process according to claim 2, characterised in that the sulphide ore collector (B) is used in an amount of 40-46 g/ton ore, 10-14 g/ton ore, Y89-6 g/ton ore, MA 4-6 g/ton ore.

5. The process according to claim 2, characterized in that the blowing agent (C) is used in an amount of MIBC 8-10 g per ton of ore.

6. The process as claimed in claim 2, wherein the amount of extractant (E) ZJ-0# is 3 to 3.5 kg/ton of copper.

7. The method as set forth in claim 2, characterized in that said additive (F) is cobalt sulfate 0.85-0.90 kg/ton copper, guar gum 0.08-0.10 kg/ton copper, coal 0.145-0.150 kg/ton copper.

8. The method as set forth in claim 2, wherein the amount of the neutralizer (G) quicklime is 7 to 9 kg/ton of copper.

9. The method as claimed in claim 2, wherein the overflow water and the filtered water of the thickener in steps A and B are pumped to the high-level water tank for recycling.

10. The method as set forth in claim 2, wherein said step C double layer vibrating screen has an upper screen mesh size of 45mm x 60mm and a lower screen mesh size of 12.5mm x 33mm.

11. The method according to claim 1 or 2, characterized in that the low-grade hard rock of step C and limestone powder (D) added in a proportion of 1-2% of the ore amount are simultaneously piled.