CN110052327B - A kind of separation method of zinc oxide-containing high-sulfur and high-copper zinc concentrate - Google Patents

Abstract

The invention discloses a sorting method for zinc oxide-containing high-sulfur and high-copper zinc concentrate. After the zinc oxide-containing high-sulfur and high-copper zinc concentrate is subjected to grading, branching and demedication, copper and zinc are separated to obtain copper containing more than 25% copper. Concentrates and zinc concentrates containing more than 50% zinc; copper and sulfur separation is carried out in copper selection I and copper sweeping I operations to obtain pyrites containing more than 45% sulfur; zinc concentrate concentrate overflow water is added with sodium carbonate to open the circuit Settling to recover zinc. The sorting method of the invention has advanced technology, good sorting effect, strong adaptability, economical and environmental protection, and is of great significance for mining enterprises or metallurgical enterprises to save energy, reduce consumption, utilize resources efficiently, improve economic benefits, and promote sustainable development of mineral resources.

Description

A kind of separation method of zinc oxide-containing high-sulfur and high-copper zinc concentrate

Technical field:

The invention relates to a method for separating concentrates, in particular to a method for separating zinc oxide-containing, high-sulfur and high-copper zinc concentrates.

Background technique:

In copper-zinc-sulfur minerals, sphalerite is more difficult to float than copper minerals. Generally, the preferential flotation process of suppressing zinc and floating copper is adopted. Unfavorable factors such as different degrees of oxidation restrict the separation of copper and zinc, especially the separation of zinc oxide-containing high-sulfur and high-copper zinc concentrates. The separation difficulties are mainly manifested in: 1) The copper-zinc-sulfur minerals are densely symbiotic with each other, and the embedded particle size is fine, which requires fine grinding to achieve deep dissociation. and soluble heavy metal salts, forming a hydrophobic film on the surface of sphalerite, activating part of the sphalerite, resulting in a decrease in the floatability difference between copper and zinc minerals; 2) The minerals contain a large amount of pyrite and pyrrhotite and other minerals and The existence of ore slime is also a key factor affecting the separation of copper and zinc, which restricts the flotation effect of zinc concentrate; 3) There are many kinds of copper minerals, and the floatability varies greatly. and the accelerated oxidation of pyrite, which also brings great difficulties to the flotation separation; 4) the residual flotation reagent in the solution environment is the biggest factor affecting the separation of copper-zinc mixed concentrate, and the residual flotation reagent has the largest adsorption capacity On the exposed surface of copper and zinc minerals, the critical point of copper mineral flotation is increased, and the mutual inclusion of copper and zinc concentrates is increased. Even if it is deeply dissociated again, the residual chemicals in the floating state will be adsorbed on the surface of the newly dissociated copper-zinc minerals as much as possible during the grinding stage, which affects the separation effect of the mixed concentrate. If the zinc oxide-containing high-sulfur and high-copper zinc concentrate cannot be effectively separated, it can only be used as an ingredient for ore blending, which reduces the utilization coefficient of zinc. The operating cost in the zinc metal smelting process also increases the resource reuse or disposal cost of the waste residue.

Invention content:

The purpose of the present invention is to provide a zinc oxide-containing high-sulfur and high-copper zinc concentrate separation method with advanced technology, good separation effect, strong adaptability, economical and environmental protection.

The object of the present invention is implemented by the following technical solutions: a method for sorting zinc oxide-containing high-sulfur and high-copper zinc concentrate, after the zinc oxide-containing high-sulfur and high-copper zinc concentrate is subjected to grading, branching and demedication, and obtained through copper and zinc separation Copper concentrates containing more than 25% copper and zinc concentrates containing more than 50% zinc; copper-sulfur separation is carried out in copper selection I and copper sweeping I operations to obtain pyrite with sulfur content of more than 45%; zinc concentrates are dense and overflowing Add sodium carbonate to open-circuit sedimentation in running water to recover zinc.

Specifically, the method for sorting zinc oxide-containing high-sulfur and high-copper zinc concentrate specifically includes the following steps: 1) grading, branching, and drug removal; 2) copper roughing; 3) copper beneficiation; 4) copper Sweeping selection; 5) copper-sulfur separation; 6) open-circuit sedimentation recovery of zinc; wherein,

1) Detoxification by grading and branching: Based on the dry weight of each ton of raw ore, the raw materials are added with water at a liquid-solid ratio of 1:1-2:3 for stirring. Grinding at 1000g/t, grinding until the grinding fineness is -0.038mm, accounting for 60%~65%; adding dispersant 500~800g/t and de-agent II 300~500g/t to grading overflow for stirring, and mixing with the mill after stirring. Machine discharge ore for mixing to obtain a mixed sample;

2) Copper roughing: the mixed sample is sequentially added with a combined inhibitor of 4000-5000 g/t and a collector of 120-150 g/t to conduct copper roughing to obtain copper roughing concentrate and copper roughing tailings;

3) Copper beneficiation: the copper rough beneficiation concentrate is selected at least once to obtain copper concentrate and copper beneficiation I tailings;

4) Copper scavenging: Copper scavenging I concentrate and zinc concentrate are obtained by at least one sweep of copper roughing tailings;

5) Separation of copper and sulfur: After the copper concentrate I tailings and the copper sweep I concentrate are combined, 1000-1500g/t of regulator is added to adjust the pH to 8 to 9, and copper-sulfur separation is carried out to obtain copper ore and iron pyrite. Mine, copper in ore returns to step 2) copper roughing operation;

6) Zinc recovery by open-circuit sedimentation: the copper scavenging tailings enter the thickener and thicken to obtain zinc concentrate, add 500-600g/t of sodium carbonate to the overflow of the thickener for zinc precipitation, and the precipitated slag is incorporated into the zinc concentrate.

Specifically, the step 3) copper selection includes: a) copper selection I; b) copper selection II; c) copper selection III; wherein,

a) Copper beneficiation I: copper rough beneficiation concentrate is added with a combined inhibitor of 4000-5000 g/t, and copper beneficiation I is carried out to obtain copper beneficiation I concentrate and copper beneficiation I tailings;

b) Copper beneficiation II: Copper beneficiation I concentrates are added with a combined inhibitor of 2000-2400 g/t for copper beneficiation II, and copper beneficiation II concentrates and copper beneficiation II tailings are obtained, and copper beneficiation II tailings are returned To copper selection I operation;

c) Copper concentration III: Add 100-200g/t of adjustment agent to copper concentration II concentrate, carry out copper concentration III, and obtain copper concentration III concentrate, namely copper concentrate and copper concentration III tailings, copper concentration III tailings are returned to copper concentrate II operation.

Specifically, the step 4) copper sweeping includes: d) copper sweeping I; e) copper sweeping II; f) copper sweeping III; wherein,

d) Copper scavenging I: The copper roughing tailings are sequentially added with a combined inhibitor of 2000-2400 g/t and a collector of 60-75 g/t, and copper scavenging Ⅰ is carried out to obtain copper scavenging Ⅰ concentrate and copper scavenging Ⅰ tailings;

e) Copper sweeping II: copper sweeping I tailings are sequentially added with combined inhibitor 1000-1200g/t, collector 30-37g/t, copper sweeping II is carried out, and copper sweeping II concentrate and copper sweeping are obtained Ⅱ tailings, copper scavenging Ⅱ concentrate returns to copper scavenging Ⅰ operation;

f) Copper sweeping III: Copper sweeping II concentrate does not add any chemicals, copper sweeping III is carried out to obtain copper sweeping III concentrate and copper sweeping tailings, and copper sweeping III concentrate is returned to copper sweeping II Operation.

Specifically, the combined inhibitor includes sodium sulfite and zinc sulfate, and the mass ratio of sodium sulfite to zinc sulfate is 1:1.

Specifically, the collector includes ethyl xanthate and butylammonium black medicine, and the mass ratio of ethyl xanthate and butylammonium black medicine is 2:1.

Specifically, the de-agent I is activated carbon.

Specifically, the de-agent II is sodium sulfide.

Specifically, the dispersant is water glass.

Specifically, the adjusting agent is lime.

Advantages of the present invention:

1) The hydrocyclone is pre-classified, and the combined process of coarse-grained regrinding + fine-grained stirring can effectively remove the drug adsorbed on the surface of the material and strengthen the drug removal effect. The material passes through the stirring-hydrocyclone, and the cylinder wall is scrubbed and the spiral classification friction is used to achieve the purpose of pre-drug removal; the coarse-grained material realizes the deep dissociation of the conjoined body through regrinding, resulting in a fresh mineral surface, which promotes the desorption of the drug from the mineral surface. At the same time, adding activated carbon can absorb the "free agent" in the pulp in time; the fine-grained material has a large specific surface area, and by adding sodium sulfide to directly stir and remove the drug, the collector film on the mineral surface can be desorbed, and the drug removal is relatively complete. Merging after branching treatment can effectively reduce the influence of excess sodium sulfide on the selected materials. The material branch treatment scheme not only strengthens the drug removal effect, but also optimizes the particle size composition, and the separation effect of copper and zinc is greatly improved.

2) It varies from material to material and follows the nature of minerals, and sets up the branch selection of medium ore and the selection of weak alkali environment. Copper concentration I and copper sweeping I operations have undergone strong suppression flotation, and the ore in the two operations is rich in pyrite. Through copper-sulfur separation, the pyrite can be efficiently recovered and the impurity content in the copper-zinc concentrate can be reduced; Through weak alkaline flotation, the selection III operation can effectively improve the quality of copper concentrate, and secondly, the influence of alkalinity on the whole flotation system can be greatly reduced.

3) Most of the zinc oxide will be converted into zinc sulfate when it encounters water. If it is not treated, the zinc ion concentration of the flotation system will soar with the circulation of the production water, which will cause excessive inhibition of zinc minerals and affect the flotation index. By adding sodium carbonate to open-circuit treatment of zinc concentrate overflow water, the process is simple, and at the same time, it can effectively control the balance of zinc ions in the flotation system, recover water-soluble zinc to the greatest extent, and ensure the sustainable and stable operation of the flotation system.

4) The sorting method of the present invention has advanced technology, good sorting effect, strong adaptability, and economical and environmental protection; it is important for mining enterprises or metallurgical enterprises to save energy, reduce consumption, utilize resources efficiently, improve economic benefits, and promote the sustainable development of mineral resources. significance.

Description of drawings:

Figure 1 is a schematic diagram of a sorting system for zinc oxide-containing high-sulfur and high-copper zinc concentrate.

Fig. 2 is a kind of process flow chart of sorting zinc oxide-containing high-sulfur and high-copper zinc concentrate.

The first mixing tank 1, the hydrocyclone 2, the second mixing tank 3, the mill 4, the roughing flotation column 5, the thickener 6, the zinc sedimentation tank 7, the copper-sulfur separation flotation machine 8, the primary selection flotation Selection column 9, secondary selection flotation column 10, tertiary selection flotation column 11, primary sweep flotation machine 12, secondary sweep flotation machine 13, and tertiary sweep flotation machine 14.

Detailed ways:

Embodiment 1: As shown in Figure 1, a zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting system includes a first stirring tank 1, a hydrocyclone 2, a second stirring tank 3, a mill 4, Rough flotation column 5, selection flotation device, sweep flotation device, thickener 6, zinc sedimentation tank 7 and copper-sulfur separation flotation machine 8; selection flotation device includes primary selection flotation column 9, The secondary selection flotation column 10 and the tertiary selection flotation column 11; the sweep flotation device includes a first sweep flotation machine 12, a second sweep flotation machine 13 and a third sweep flotation machine 14;

The discharge port of the first mixing barrel 1 is connected to the feeding port of the hydrocyclone 2; the overflow outlet of the hydrocyclone 2 is connected to the inlet of the second mixing barrel 3, and the underflow outlet of the hydrocyclone 2 is connected to the mill. The inlet of 4 is connected; the outlet of the second stirring barrel 3 and the outlet of the mill 4 are connected with the inlet of the roughing flotation column 5; the copper roughing concentrate outlet of the roughing flotation column 5 is connected with the primary selection flotation column The copper roughing concentrate inlet of 9 is connected, the copper concentrate I concentrate outlet of primary beneficiation flotation column 9 is connected to the inlet of secondary beneficiation flotation column 10, and the copper beneficiation I of primary beneficiation flotation column 9 is connected The tailings outlet is connected to the inlet of the copper-sulfur separation flotation machine 8; the copper concentrate II concentrate outlet of the secondary selection flotation column 10 is connected to the inlet of the tertiary selection flotation column 11, and the secondary selection flotation column The copper concentrate II tailings outlet of 10 is connected to the copper roughing concentrate inlet of primary concentrate flotation column 9; the copper concentrate III tailings outlet of tertiary concentrate flotation column 11 is connected to the secondary concentrate flotation column 10 import connection.

The copper roughing tailings outlet of the roughing flotation column 5 is connected to the copper roughing tailings inlet of the primary scavenging flotation machine 12, and the copper scavenging I concentrate outlet of the primary scavenging flotation machine 12 is connected to the copper-sulfur separation flotation. The inlet of the separator 8 is connected, the copper scavenging I tailings outlet of the primary scavenging flotation machine 12 is connected to the inlet of the secondary scavenging flotation machine 12; the copper scavenging II concentrate of the secondary scavenging flotation machine 13 The outlet is connected to the copper roughing tailings inlet of the primary sweeping flotation machine 12, the copper sweeping II tailings outlet of the secondary sweeping flotation machine 13 is connected to the inlet of the third sweeping flotation machine 14, and the third sweeping flotation machine 14 The copper scavenging III concentrate outlet of the separator 14 is connected to the inlet of the secondary scavenging flotation machine 13, and the copper scavenging tailings outlet of the tertiary scavenging flotation machine 14 is connected to the inlet of the thickener 6. The overflow port is connected to the inlet of the zinc precipitation tank 7 .

The copper medium ore outlet of the copper-sulfur separation flotation machine 8 is connected to the inlet of the rougher flotation column 5 .

Examples 2-4 all use the system of Example 1 to complete the separation of zinc oxide-containing, high-sulfur and high-copper zinc concentrates.

Embodiment 2: As shown in Figure 2, a method for sorting zinc oxide-containing, high-sulfur and high-copper zinc concentrate, which specifically includes the following steps: 1) grading, branching and drug removal; 2) copper roughing; 3) copper beneficiation 4) copper scavenging; 5) copper-sulfur separation; 6) open-circuit sedimentation reclaims zinc; wherein,

1) Detoxification by grading and branching: Based on the dry weight of each ton of raw ore, the raw materials are mixed with water at a liquid-solid ratio of 1:1, and after full stirring, they are graded by a hydrocyclone, and 800g/t of activated carbon is added to the graded bottom flow for grinding. Grind until the grinding fineness is -0.038mm, accounting for 60%, add water glass 500g/t and sodium sulfide 300g/t to the grading overflow for stirring, and mix with the mill to discharge the ore to obtain a mixed sample;

2) Rough selection of copper: the mixed sample was added in sequence with the combined inhibitor: sodium sulfite 2000g/t+zinc sulfate 2000g/t, collector: ethyl xanthate 80g/t+butylammonium black medicine 40g/t, and copper rough selection was performed to obtain copper Rougher concentrate and copper rougher tailings;

3) Copper Picks:

a) Copper beneficiation I: copper rough beneficiation concentrate is added with combined inhibitor sodium sulfite 2000g/t + zinc sulfate 2000g/t, copper beneficiation I is carried out, and copper beneficiation I concentrate and copper beneficiation I tailings are obtained;

b) Copper beneficiation II: Copper beneficiation Ⅰ concentrate is added with combined inhibitor sodium sulfite 1000g/t + zinc sulfate 1000g/t to conduct copper beneficiationⅡ, and copper beneficiationⅡconcentrate and copper beneficiationⅡ tailings are obtained, copper beneficiation II tailings are returned to copper concentrate I operation;

c) Copper concentrate III: Add 100 g/t of lime as regulator to the concentrate of copper concentrate II, and conduct copper concentrate III to obtain copper concentrate III (namely copper concentrate) and copper concentrate III tailings. The tailings of Concentration III are returned to the operation of Copper Concentration II.

4) Copper sweep selection:

d) Copper scavenging I: copper roughing tailings are sequentially added with combined inhibitor sodium sulfite 1000g/t + zinc sulfate 1000g/t, collector ethyl xanthate 40g/t + butylammonium black medicine 20g/t, and copper sweeping I , to obtain copper sweep I concentrate and copper sweep I tailings;

e) Copper scavenging II: copper scavenging Ⅰ tailings are sequentially added with combined inhibitor sodium sulfite 500g/t + zinc sulfate 500g/t, collector ethyl xanthate 20g/t + butylammonium black medicine 10g/t, and copper scavenging is carried out. Ⅱ, get copper scavenging II concentrate and copper scavenging Ⅱ tailings, copper scavenging Ⅱ concentrate is returned to copper scavenging Ⅰ operation;

f) Copper sweeping III: Copper sweeping II concentrate does not add any chemicals, copper sweeping III is carried out to obtain copper sweeping III concentrate and copper sweeping tailings (ie zinc concentrate), copper sweeping III concentrate Return to copper sweeping II operation.

5) Separation of copper and sulfur: After the copper concentrate I tailings and the copper sweep I concentrate are combined, 1000g/t of lime as a regulator is added to adjust the pH to 8, and copper and sulfur are separated to obtain copper medium ore and pyrite, copper China Mine returned to step 2) copper roughing operation.

6) Open-circuit sedimentation to recover zinc: the copper scavenging tailings enter the thickener and thicken to obtain zinc concentrate, add 500g/t of sodium carbonate to the overflow of the thickener for zinc precipitation, and the precipitated slag is incorporated into the zinc concentrate.

The concentrated overflow water of each concentrate and the overflow water of zinc sedimentation are directly recycled.

Embodiment 3: As shown in Figure 2, a method for sorting zinc oxide-containing, high-sulfur and high-copper zinc concentrate, which specifically includes the following steps: 1) grading, branching and drug removal; 2) copper roughing; 3) copper beneficiation 4) copper scavenging; 5) copper-sulfur separation; 6) open-circuit sedimentation reclaims zinc; wherein,

1) Detoxification by grading and branching: According to the dry weight of each ton of raw ore, the raw materials are mixed with water at a liquid-solid ratio of 2:3, and after full stirring, they are graded by a hydrocyclone, and 1000g/t of activated carbon is added to the graded underflow for grinding. Grind until the grinding fineness is -0.038mm, accounting for 65%, add water glass 800g/t and sodium sulfide 500g/t to the grading overflow for stirring, and mix with the mill to discharge the ore after stirring to obtain a mixed sample;

2) Rough selection of copper: the mixed sample was sequentially added with combined inhibitor sodium sulfite 2500g/t+zinc sulfate 2500g/t, collector ethyl xanthate 100g/t+butylammonium black medicine 50g/t, and copper rough selection was carried out to obtain copper rough selection Concentrates and copper roughing tailings;

3) Copper Picks:

a) Copper beneficiation I: The copper rough beneficiation concentrate is added with a combined inhibitor of sodium sulfite 2500g/t + zinc sulfate 2500g/t, and copper beneficiation I is carried out to obtain copper beneficiation concentrate I and copper beneficiation I tailings;

b) Copper beneficiation II: Copper beneficiation Ⅰ concentrate is added with combined inhibitor sodium sulfite 1200g/t + zinc sulfate 1200g/t for copper beneficiationⅡ, and copper beneficiationⅡconcentrate and copper beneficiationⅡ tailings are obtained, copper beneficiation II tailings are returned to copper concentrate I operation;

c) Copper concentrate III: Add 200g/t of lime as regulator lime to copper concentrate II, carry out copper concentrate III, and obtain copper concentrate III (namely copper concentrate) and copper concentrate III tailings, copper concentrate The tailings of Concentration III are returned to the operation of Copper Concentration II.

4) Copper sweep selection:

d) Copper scavenging I: copper roughing tailings are sequentially added with combined inhibitor sodium sulfite 1200g/t + zinc sulfate 1200g/t, collector ethyl xanthate 50g/t + butylammonium black medicine 25g/t, and copper sweeping I , to obtain copper sweep I concentrate and copper sweep I tailings;

e) Copper sweeping II: copper sweeping I tailings are sequentially added with combined inhibitor sodium sulfite 600g/t + zinc sulfate 600g/t, collector ethyl xanthate 25g/t + butylammonium black medicine 12.5g/t, and copper sweeping is carried out. Selecting II, obtaining copper-sweeping II concentrate and copper-sweeping II tailings, and copper-sweeping II concentrate is returned to copper-sweeping I operation;

f) Copper sweeping III: Copper sweeping II concentrate does not add any chemicals, copper sweeping III is carried out to obtain copper sweeping III concentrate and copper sweeping tailings (ie zinc concentrate), copper sweeping III concentrate Return to copper sweeping II operation.

5) Separation of copper and sulfur: After the copper concentrate I tailings and the copper sweep I concentrate are combined, add the regulator lime 1500g/t, adjust the pH to 9, and separate copper and sulfur to obtain copper ore and pyrite, copper China Mine returned to step 2) copper roughing operation.

6) Open-circuit sedimentation to recover zinc: the copper scavenging tailings enter the thickener and thicken to obtain zinc concentrate, add 600g/t of sodium carbonate to the overflow of the thickener for zinc precipitation, and the precipitated slag is incorporated into the zinc concentrate.

The concentrated overflow water of each concentrate and the overflow water of zinc sedimentation are directly recycled.

Embodiment 4: As shown in Figure 2, a method for sorting zinc oxide-containing high-sulfur and high-copper zinc concentrate, which specifically includes the following steps: 1) grading, branching, and drug removal; 2) copper roughing; 3) copper beneficiation 4) copper scavenging; 5) copper-sulfur separation; 6) open-circuit sedimentation reclaims zinc; wherein,

1) Detoxification by grading branch: According to the dry weight of each ton of raw ore, the raw materials are mixed with water at a liquid-solid ratio of 9:11, and after full stirring, they are classified by a hydrocyclone. Grind until the grinding fineness is -0.038mm, accounting for 63%, add water glass 650g/t and sodium sulfide 400g/t to the grading overflow for stirring, and mix with the mill to discharge the ore to obtain a mixed sample;

2) Rough selection of copper: the mixed sample was sequentially added with combined inhibitor sodium sulfite 2200g/t+zinc sulfate 2200g/t, collector ethyl xanthate 90g/t+butylammonium black medicine 45g/t, and copper rough selection was carried out to obtain copper rough selection Concentrates and copper roughing tailings;

3) Copper Picks:

a) Copper beneficiation I: copper rough beneficiation concentrate is added with combined inhibitor sodium sulfite 2200g/t + zinc sulfate 2200g/t, copper beneficiation I is carried out, and copper beneficiation concentrate I and copper beneficiation I tailings are obtained;

b) Copper beneficiation II: Copper beneficiation I concentrate is added with combined inhibitor sodium sulfite 1100g/t + zinc sulfate 1100g/t for copper beneficiation II to obtain copper beneficiation II concentrate and copper beneficiary II tailings, copper beneficiation II tailings are returned to copper concentrate I operation;

c) Copper concentration III: Add 150g/t of lime as a regulator to the copper concentration II concentrate, and conduct copper concentration III to obtain copper concentration III concentrate (ie copper concentrate) and copper concentration III tailings. The tailings of Concentration III are returned to the operation of Copper Concentration II.

4) Copper sweep selection:

d) Copper scavenging I: copper roughing tailings are sequentially added with combined inhibitor sodium sulfite 1100g/t + zinc sulfate 1100g/t, collector ethyl xanthate 45g/t + butylammonium black medicine 22.5g/t, and copper scavenging is carried out. Ⅰ. Obtain copper scavenging Ⅰ concentrate and copper scavenging Ⅰ tailings;

e) Copper sweeping II: copper sweeping I tailings are sequentially added with combined inhibitor sodium sulfite 550g/t + zinc sulfate 550g/t, collector ethyl xanthate 22g/t + butylammonium black medicine 11g/t, and copper sweeping is carried out. Ⅱ, get copper scavenging II concentrate and copper scavenging Ⅱ tailings, copper scavenging Ⅱ concentrate is returned to copper scavenging Ⅰ operation;

f) Copper sweeping III: Copper sweeping II concentrate does not add any chemicals, copper sweeping III is carried out to obtain copper sweeping III concentrate and copper sweeping tailings (ie zinc concentrate), copper sweeping III concentrate Return to copper sweeping II operation.

5) Separation of copper and sulfur: After the copper concentrate I tailings and the copper sweep I concentrate are combined, 1300g/t of lime as a regulator is added to adjust the pH to 8.5 to separate copper and sulfur to obtain copper ore and pyrite, copper China Mine returned to step 2) copper roughing operation.

6) Open-circuit sedimentation to recover zinc: the copper scavenging tailings enter the thickener and thicken to obtain zinc concentrate, add 550g/t of sodium carbonate to the overflow of the thickener for zinc precipitation, and the precipitated slag is incorporated into the zinc concentrate.

The concentrated overflow water of each concentrate and the overflow water of zinc sedimentation are directly recycled.

Embodiment 5: carry out sorting according to the method of embodiment 2-4 of the present invention, and the test results are shown in Table 1:

Table 1 carries out the sorting test result according to the method of embodiment 2-4 of the present invention

From the test results in Table 1, it can be shown that the present invention has advanced technology and can realize efficient separation of zinc oxide-containing high-sulfur and high-copper zinc concentrates.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. a zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting method is characterized in that: after the zinc oxide-containing high-sulfur and high-copper zinc concentrate is carried out grading and branching demedication, through copper, zinc sorting obtains copper-containing 25% The above copper concentrates and zinc concentrates containing more than 50% zinc; copper and sulfur separation is carried out in the copper selection I and copper sweeping I operations to obtain pyrite with a sulfur content of more than 45%; the concentrated overflow water of the zinc concentrate is added with carbonic acid Sodium open-circuit sedimentation to recover zinc; It specifically includes the following steps: 1) grading and branching drug removal; 2) copper roughing; 3) copper selection; 4) copper sweeping; 5) copper-sulfur separation; 6) open-circuit sedimentation to recover zinc; wherein, 1) Detoxification by grading and branching: Based on the dry weight of each ton of raw ore, the raw materials are added with water at a liquid-solid ratio of 1:1-2:3 for stirring. Grinding at 1000g/t, grinding to the grinding fineness of -0.038mm accounts for 60%~65%; adding dispersant 500~800g/t and de-agent II 300~500g/t to the grading overflow for stirring, and mixing with the mill after stirring. Machine discharge ore for mixing to obtain a mixed sample; 2) Copper roughing: the mixed sample is sequentially added with a combined inhibitor of 4000-5000 g/t and a collector of 120-150 g/t to conduct copper roughing to obtain copper roughing concentrate and copper roughing tailings; 3) Copper beneficiation: the copper rough beneficiation concentrate is subjected to at least one beneficiation to obtain copper concentrate and copper beneficiation I tailings; 4) Copper scavenging: Copper scavenging I concentrate and zinc concentrate are obtained by at least one sweep of copper roughing tailings; 5) Separation of copper and sulfur: After the copper concentrate I tailings and the copper sweep I concentrate are combined, 1000-1500g/t of regulator is added to adjust the pH to 8 to 9, and copper-sulfur separation is carried out to obtain copper ore and iron pyrite. Mine, copper in ore returns to step 2) copper roughing operation; 6) Open-circuit sedimentation to recover zinc: the copper scavenging tailings enter the thickener and then thicken to obtain zinc concentrate, add 500-600g/t of sodium carbonate to the overflow of the thickener for zinc precipitation, and the precipitated slag is incorporated into the zinc concentrate. 2. a kind of zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting method according to claim 1, is characterized in that: described step 3) copper beneficiation comprises: a) copper beneficiation I; b) copper beneficiation Option II; c) Copper Selection III; of which, a) Copper beneficiation I: copper rough beneficiation concentrate is added with a combined inhibitor of 4000-5000 g/t, and copper beneficiation I is carried out to obtain copper beneficiation I concentrate and copper beneficiation I tailings; b) Copper beneficiation II: Copper beneficiation I concentrates are added with a combined inhibitor of 2000-2400 g/t for copper beneficiation II, and copper beneficiation II concentrates and copper beneficiation II tailings are obtained, and copper beneficiation II tailings are returned To copper selection I operation; c) Copper concentration III: Add 100-200g/t of adjustment agent to copper concentration II concentrate, carry out copper concentration III, and obtain copper concentration III concentrate, namely copper concentrate and copper concentration III tailings, copper concentration III tailings are returned to copper concentrate II operation. 3. a kind of zinc oxide-containing high-sulfur and high-copper zinc concentrate separation method according to claim 1, is characterized in that: described step 4) copper sweeping comprises: d) copper sweeping I; e) copper sweeping Selection II; f) Copper sweep selection III; of which, d) Copper scavenging I: The copper roughing tailings are sequentially added with a combined inhibitor of 2000-2400 g/t and a collector of 60-75 g/t, and copper scavenging Ⅰ is carried out to obtain copper scavenging Ⅰ concentrate and copper scavenging Ⅰ tailings; e) Copper sweeping II: copper sweeping I tailings are sequentially added with combined inhibitor 1000-1200g/t, collector 30-37g/t, copper sweeping II is carried out, and copper sweeping II concentrate and copper sweeping are obtained Ⅱ tailings, copper scavenging Ⅱ concentrate returns to copper scavenging Ⅰ operation; f) Copper sweeping III: Copper sweeping II concentrate does not add any chemicals, copper sweeping III is carried out to obtain copper sweeping III concentrate and copper sweeping tailings, and copper sweeping III concentrate is returned to copper sweeping II Operation. 4. a kind of zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting method according to any one of claims 1-3, is characterized in that: described combined inhibitor comprises sodium sulfite and zinc sulfate, sodium sulfite and zinc sulfate The mass ratio is 1:1. 5. a kind of zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting method according to claim 1 or 3, is characterized in that: described collector comprises ethyl xanthate and butylammonium black medicine, ethyl xanthate The mass ratio of medicine and butylammonium black medicine is 2:1. 6 . The method for separating zinc oxide-containing high-sulfur and high-copper zinc concentrate according to claim 1 , wherein the de-agent I is activated carbon. 7 . 7 . The method for separating zinc oxide-containing high-sulfur and high-copper zinc concentrate according to claim 1 , wherein the de-agent II is sodium sulfide. 8 . 8 . The method for sorting zinc oxide-containing high-sulfur and high-copper zinc concentrate according to claim 1 , wherein the dispersant is water glass. 9 . 9. A kind of zinc oxide-containing high-sulfur and high-copper zinc concentrate sorting method according to claim 1 or 2, characterized in that: the adjusting agent is lime.

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