CN107999267B - A flotation separation process of high-sulfur lead-zinc ore in a high-concentration environment - Google Patents

Abstract

The invention discloses high sulfur-lead-zinc ore floatation separation process under a kind of high concentration environment, it is directed to lead zinc sulphur ore of the high-sulfur containing accompaning goldsilver, using preferentially selecting lead and accompaning goldsilver mineral under high concentration, neutral nature pH flotation environment；Float lead tailings go out zinc sulfur mineral using two sections of roughing bulk flotations, realize zinc sulphur content from and adding a small amount of activator and collecting agent strengthens the floating of difficult floating zinc mineral using lime regulation pH values of pulp and pulp potential in zinc sulphur separating flotation.The method overcomes when High Alkalinity Medium floats lead the defects of lead recovery of gold and silver is low, dosing is big, floatation process is unstable；Simultaneously, zinc sulfur mineral inhibitor XKY012 and lead gold and silver collector and frother XKY712 are invented, solving lead zinc sulfide selects low efficiency, separation accuracy poor, the weak problem of the part hydrophobic ability of lead gold silver mineral, have many advantages, such as that energy conservation and environmental protection, nontoxic, beneficiation cost is low, recovery efficiency is high, the synthetical recovery of valuable metal mineral suitable for high-sulfur Pb-Zn deposits containing gold and silver.

Description

A flotation separation process of high-sulfur lead-zinc ore in a high-concentration environment

technical field

The invention relates to the technical field of non-ferrous metal ore flotation, in particular to a beneficiation process for recovering valuable metal minerals in high-sulfur lead-zinc ore.

Background technique

The presence of precious metal gold and silver minerals is often associated with lead-zinc polymetallic sulfide ores, in which lead, zinc, and sulfur mainly exist in the form of galena, (iron) sphalerite, and (magnetic) pyrite, and the gold minerals are in the form of galena Ore-wrapped gold, pyrite-wrapped gold and a small amount of natural gold exist, and silver minerals mainly exist in the form of silver sulfide and natural silver. The valuable metal minerals that can be comprehensively recovered in the ore include lead, zinc, sulfur and associated gold and silver. The gold and silver minerals are mainly enriched in the lead concentrate for comprehensive recovery. In the sorting process of this kind of ore, there are generally problems such as difficult separation of lead, zinc and sulfur, serious metal intercontainment, low recovery rate of main metal and associated gold and silver minerals, high consumption of chemicals, water and energy in flotation, especially During the flotation process of high-sulfur lead-zinc ore, there are outstanding problems such as high flotation pH, large amount of flotation reagents, unstable flotation process, and high beneficiation cost.

Patent No. CN103041924B Chinese invention patent "Ore dressing process for recovering associated silver from lead-zinc-silver sulfide ore" discloses a mineral processing process for recovering associated silver from high-sulfur lead-zinc-silver sulfide ore. Under the conditions of 72% concentration and 30% flotation concentration, lime is used as slurry pH adjuster and sulfur mineral inhibitor, sodium carbonate + zinc sulfate is zinc mineral inhibitor, ethyl disulfide is the main collector of lead mineral, and compound yellow Medicine is used as an auxiliary collector, terpineol oil is used as a foaming agent to preferentially float lead and silver minerals; copper sulfate is used as an activator when zinc is selected, isobutyl xanthate is used as a collector, and terpineol oil is used as a foaming agent. Although this method has obtained a lead-silver concentrate with a lead content of more than 52%, a silver content of 2382g/t, a lead recovery rate of 88.43%, and a silver recovery rate of 75.86%, the silver recovery rate is low and the lime consumption in the lead flotation circuit is too large (15kg/t) and other issues, the amount of collector ethiazide + compound xanthate also reached 210g/t, and the cost of mineral processing and energy consumption are still high.

Contents of the invention

The technical problem to be solved in the present invention is that for high-sulfur lead-zinc sulfide ores containing associated gold and silver, it is difficult to select by traditional mineral processing technology, the separation efficiency is low, the comprehensive index of mineral processing is poor, the recovery rate of associated gold and silver is low, and the cost and cost of mineral processing are low. To solve the problems of high energy consumption and unstable flotation process, provide a high-efficiency, stable, energy-saving, environmentally friendly, high-separation efficiency, strong adaptability, and high-concentration flotation environment to recover high-sulfur lead-zinc ore. The beneficiation process of valuable metal minerals enables efficient and comprehensive recycling of valuable metal resources in such lead-zinc sulfide ores.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a high-sulfur lead-zinc ore flotation separation process in a high-concentration environment, which is characterized in that: it is carried out according to the following steps,

(1) Ore grinding: grind the ore finely to obtain the ore grinding slurry; wherein the grinding fineness of the raw ore is -0.074mm, and the particle size grade content accounts for 60-80% of the total weight of the raw ore;

(2) After adjusting the flotation concentration of the grinding slurry obtained in step (1), carry out lead roughing to obtain lead rough concentrate and lead roughing tailings; wherein the lead roughing operation process conditions are: first add zinc sulfur to inhibit The agent XKY012 is 500-1000g/t, and the action time is 3-5min, and the collector XK712 is added at 50-80g/t, and the action time is 2-3min;

(3) The lead roughing tailings obtained in step (2) are subjected to lead scavenging twice, i.e. lead scavenging I and lead scavenging II, to obtain lead scavenging tailings and two lead scavenging ores, two lead scavenging Sweeping and mining return to the previous layer of operations in sequence; the process conditions for the two operations of lead sweeping are as follows: lead sweeping I operation adds collector XK712 at 20-30g/t, and the action time is 2-3min; lead sweeping In operation II, add collector XK712 at 10-20g/t, and the action time is 2-3min;

(4) Carry out the lead concentrate that step (2) obtains to lead beneficiation twice, i.e. lead concentrate I and lead concentrate II, obtain lead concentrate and two lead concentrate middle ores, two lead concentrate middle ore Respectively return to the previous layer of operations in sequence; the process conditions of the secondary operation of lead selection are: the zinc-sulfur inhibitor XKY012 is added at 300-500g/t for the operation of lead concentration I, and the action time is 3-5min; The inhibitor XKY012 is 200-300g/t, and the action time is 3-5min;

(5) The lead scavenging tailings obtained in step (3) are subjected to zinc-sulfur mixed roughing for the first time to obtain zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rougher I tailings; The technological conditions of the beneficiation operation are as follows: add the pulp regulator lime 500-1000g/t, the action time is 3-5min, the activator copper sulfate is 300-400g/t, the action time is 3-5min, the collector butyl xanthate 60- 100g/t, the action time is 2~3min, foaming agent 2# oil 10~20g/t, the action time is 1~2min;

(6) Carry out the zinc-sulfur mixed roughing I tailings obtained in step (5) for the second mixed roughing of zinc and sulfur to obtain zinc-sulfur mixed rough concentrate II and zinc-sulfur mixed roughing II tailings; wherein the zinc-sulfur first The technical conditions of the secondary mixing and roughing operation are as follows: activator copper sulfate 50-80g/t is added, and the action time is 3-5 minutes; collector butyl xanthate is 20-30g/t, and the action time is 2-3 minutes;

(7) The zinc-sulfur mixed roughing II tailings obtained in step (6) are subjected to zinc-sulfur mixed scavenging for one time to obtain zinc-sulfur mixed flotation tailings and zinc-sulfur mixed scavenging ore, and the zinc-sulfur mixed scavenging ore is returned in sequence Go to the upper layer for operation; the technological conditions for the zinc-sulfur mixed sweeping operation are: add collector butyl xanthate 20-30g/t, and the action time is 2-3min;

(8) Combine the zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rough concentrate II obtained in step (5) and step (6) respectively and carry out zinc-sulfur separation and roughing to obtain zinc rough concentrate and zinc roughing tailings ore; among them, zinc-sulfur separation and roughing process conditions are as follows: add inhibitor lime 3000-5000g/t, action time is 3-5min, activator copper sulfate 30-50g/t, action time is 3-5min, collector Butyl xanthate 10~20g/t, the action time is 2~3min;

(9) Zinc roughing tailings obtained in step (8) are carried out a zinc sweep to obtain sulfur concentrate and a zinc sweep, and the sequence of zinc sweep is returned to the previous layer of operation; wherein the zinc sweep process conditions For: adding collector butyl xanthate 10~15g/t to zinc sweeping operation, the action time is 2~3min;

(10) Carry out zinc concentration secondary to the zinc rough concentrate that step (9) obtains, obtain zinc concentrate and two zinc concentration medium ores, and two zinc concentration medium ores return to the operation of upper layer respectively sequentially; Among them, the process conditions for the secondary operation of zinc refining are: adding inhibitor lime 1000-2000g/t in zinc refining Ⅰ operation, and the action time is 3-5min; ~5min.

Further, in steps (2) and (4), the zinc-sulfur inhibitor XKY012 is made of zinc sulfate, sodium sulfite, and hydroxyethyl cellulose, and the mass ratio is 1.0:(0.5～1.0):(0.1～ The ratio of 0.2) is mixed under normal pressure with a beaker as a container, hot water above 60°C as a solvent, and stirred with a magnetic stirrer for 20 to 30 minutes to obtain it.

Further, in steps (2), (3), the collector XK712 is based on dihydrocarbyl dithiophosphate, dianilino ammonium dithiophosphate, sodium diethyldithiocarbamate, isoamyl Base xanthate as raw material, mixed according to the mass ratio of 4:3:2:1, under normal temperature and pressure, use a beaker as a container, 10% sodium carbonate solution as a solvent, and stir with a magnetic stirrer for 40 to 60 minutes. get it.

Preferably, in step (2), the flotation concentration is 45-50%.

Further, in step (5), 500-1000 g/t of lime, a slurry regulator, is added to the zinc-sulfur first mixed roughing operation to adjust the pH value of the slurry to 8.5-9.5.

Further, the collector XK712 doubles as a foaming agent and has the function of a foaming agent.

The main advantages of the present invention are that, firstly, for high-sulfur lead-zinc sulfide ores containing associated gold and silver, the traditional mineral processing technology is difficult to sort, the sorting efficiency is low, the comprehensive index of mineral processing is poor, the recovery rate of associated gold and silver is low, and the amount of lime used , high pH value of pulp, high cost and energy consumption of beneficiation, unstable flotation process and other prominent problems. The invention creatively proposes that the flotation of lead and associated gold and silver is carried out in a high-concentration, natural pH medium environment, and the high-concentration flotation environment breaks the conventional flotation concentration (30-35%) condition where the amount of collector is large and the production capacity is large. Minor disadvantages, high-concentration flotation process increases the concentration of reagents in the slurry, strengthens the interaction between reagents and minerals, and effectively strengthens the arching effect of air bubbles on useful hydrophobic particles, shortening the buoyancy distance of useful mineral mineralized bubbles. Reduces the probability of particles (especially coarse particles) falling off from the air bubbles; under the condition of natural pH medium ore slurry, lead is preferentially floated, effectively overcoming the stickiness of flotation foam, poor foam fluidity and single type of lead collector in high alkali environment At the same time, the natural pH slurry environment creates good conditions for the flotation recovery of associated gold and silver minerals.

Second, for high-sulfur lead-zinc mines, zinc and sulfur are easy to float into the lead concentrate during the lead flotation process, resulting in low-grade lead concentrate and serious impurities. Inhibitor XKY012 realizes the deep suppression of zinc and sulfur minerals under the priority floating process, improves the quality of lead concentrate, and effectively reduces the impurity content.

Third, the invention of high-efficiency selective collectors for lead, gold and silver can effectively strengthen the high-efficiency flotation of fine-grained lead minerals and associated gold and silver minerals. The beneficiation recovery rate of gold and silver minerals.

Compared with the prior art, the present invention has the advantages of: for high-sulfur lead-zinc sulfide ores containing associated gold and silver, it creatively proposes high-concentration and preferential floating lead in natural pH environment, which solves the problem of long beneficiation process and large dosage of chemicals. , high energy consumption, unstable flotation process, gold and silver are sensitive to the pH of the ore pulp; secondly, the high-efficiency zinc-sulfur mineral inhibitor XKY012 and the high-efficiency lead-gold-silver selective collector XK712 were invented to realize the protection of zinc-sulfur minerals Deep suppression improves the quality of lead concentrate and reduces the impurity content in the concentrate. It also realizes a good match between collectors and inhibitors and high-concentration and natural pH slurry environment. It is the lead-zinc and lead-sulfur minerals Flotation separation creates good conditions, improves the recovery rate of lead and associated gold and silver, and realizes the efficient separation of lead, zinc and sulfur minerals and the comprehensive recovery of associated gold and silver minerals. Stability and other significant advantages.

Description of drawings

Fig. 1 is process flow chart of the present invention.

Detailed ways

The present invention will be further described below in conjunction with Fig. 1 by specific embodiment:

Embodiment 1, one, the preparation of efficient zinc-sulfur mineral inhibitor XKY012

Mix 100 grams of zinc sulfate, 50 grams of sodium sulfite, and 10 grams of hydroxyethyl cellulose, use a beaker as a container under normal pressure, use hot water above 60°C as a solvent, and stir with a magnetic stirrer for 20 to 30 minutes to obtain XKY012 solution.

2. Preparation of high-efficiency lead, gold and silver mineral collection foaming agent XK712

(1) With 100 grams of anhydrous sodium carbonate, 1000 grams of clear water, under normal temperature and pressure, use a beaker as a container, and stir with a magnetic stirrer for 5 to 10 minutes to obtain a 10% concentration sodium carbonate solution.

(2), 40 grams of dihydrocarbyl dithiophosphate, 30 grams of dianilino ammonium dithiophosphate, 20 grams of sodium diethyldithiocarbamate, and 10 grams of isoamyl xanthate were mixed, and the A beaker is used as a container, the above-mentioned 10% sodium carbonate is used as a solvent, and the XK712 solution is obtained by stirring with a magnetic stirrer for 40-60 minutes.

3. Mining process

The selected ore is a lead-zinc sulfide ore containing galena, sphalerite, pyrite, and associated gold and silver. The gold is mainly pyrite-wrapped gold and a small amount of natural gold, and the silver is mainly silver sulfide and Natural silver; raw ore contains 2.94% lead, 4.03% zinc, 19.16% sulfur, 0.37g/t gold and 42.18g/t silver; the main metal minerals are pyrite, sphalerite and galena , followed by magnetite, rhodochrosite, colloidal pyrite, a small amount of chalcopyrite, smithsonite, etc.; the main gangue minerals are quartz, calcite, diopside, chlorite, etc. The ore is treated with the traditional lead-zinc priority flotation process, and the obtained lead concentrate contains 72.54% lead, 3.68% zinc, 2.56g/t gold, and 867.65g/t silver, with a lead recovery rate of 91.34% and gold recovery The obtained zinc concentrate contains 46.24% zinc and the zinc recovery rate is 92.86%; the obtained sulfur concentrate contains 40.52% sulfur and the sulfur recovery rate is 70.43%.

The selection steps are:

(1) Grinding the ore to obtain a grinding slurry; wherein the grinding fineness of the raw ore grinding is -0.074mm, and the particle size level content accounts for 60% of the total weight of the raw ore;

(2) carry out lead roughing after adjusting the flotation concentration 45% of the grinding ore slurry obtained in step (1), obtain lead coarse concentrate and lead roughing tailings; wherein the lead roughing operation process condition is: first add zinc sulfur Inhibitor XKY012 is 1000g/t, and the action time is 5min, and the collector XK712 is added at 80g/t, and the action time is 3min;

(3) The lead roughing tailings obtained in step (2) are subjected to lead scavenging twice, i.e. lead scavenging I and lead scavenging II, to obtain lead scavenging tailings and two lead scavenging ores, two lead scavenging Sweeping and mining return to the previous layer of operations in sequence; the process conditions of the two operations of lead sweeping are as follows: lead sweeping I operation adds collector XK712 at 30g/t, and the action time is 3min; lead sweeping II operation adds capture The receiving agent XK712 is 20g/t, and the action time is 3min;

(4) Carry out the lead concentrate that step (2) obtains to lead beneficiation twice, i.e. lead concentrate I and lead concentrate II, obtain lead concentrate and two lead concentrate middle ores, two lead concentrate middle ore Return to the previous operation in sequence; the process conditions for the secondary operation of lead selection are as follows: 500g/t of zinc-sulfur inhibitor XKY012 is added to the lead fine Ⅰ operation, and the action time is 5min; the zinc-sulfur inhibitor XKY012 is added to the lead fine Ⅱ operation 300g/t, the action time is 5min;

(5) The lead scavenging tailings obtained in step (3) are subjected to zinc-sulfur mixed roughing for the first time to obtain zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rougher I tailings; The technological conditions of the beneficiation operation are as follows: add 500g/t of pulp regulator lime, and the action time is 5min; Foaming agent 2# oil 20g/t, action time is 2min;

(6) Carry out the zinc-sulfur mixed roughing I tailings obtained in step (5) for the second mixed roughing of zinc and sulfur to obtain zinc-sulfur mixed rough concentrate II and zinc-sulfur mixed roughing II tailings; wherein the zinc-sulfur first The technical conditions of the secondary mixing and roughing operation are as follows: activator copper sulfate 80g/t is added, and the action time is 5min; collector butyl xanthate is 30g/t, and the action time is 3min;

(7) The zinc-sulfur mixed roughing II tailings obtained in step (6) are subjected to zinc-sulfur mixed scavenging for one time to obtain zinc-sulfur mixed flotation tailings and zinc-sulfur mixed scavenging ore, and the zinc-sulfur mixed scavenging ore is returned in sequence Go to the upper layer for operation; the zinc-sulfur mixed sweeping operation process conditions are: add collector butyl xanthate 30g/t, and the action time is 3min;

(8) Combine the zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rough concentrate II obtained in step (5) and step (6) respectively and carry out zinc-sulfur separation and roughing to obtain zinc rough concentrate and zinc roughing tailings ore; among them, zinc-sulfur separation and roughing process conditions are as follows: add inhibitor lime 3000g/t, action time is 5min, activator copper sulfate 50g/t, action time is 5min, collector butyl xanthate 20g/t, The action time is 3 minutes;

(9) Zinc roughing tailings obtained in step (8) are carried out a zinc sweep to obtain sulfur concentrate and a zinc sweep, and the sequence of zinc sweep is returned to the previous layer of operation; wherein the zinc sweep process conditions For: adding collector butyl xanthate 15g/t to zinc sweeping operation, the action time is 3min;

(10) Carry out zinc concentration secondary to the zinc rough concentrate that step (9) obtains, obtain zinc concentrate and two zinc concentration medium ores, and two zinc concentration medium ores return to the operation of upper layer respectively sequentially; Among them, the process conditions of the secondary operation of zinc concentration are: adding 2000g/t of inhibitor lime to the zinc concentration I operation, and the action time is 5 minutes; adding 1000g/t inhibitor lime to the zinc concentration II operation, and the action time is 5 minutes.

The beneficiation results are shown in Table 1 below:

Table 1 Flotation index (%)

continued:

Embodiment 2, one, the preparation of efficient zinc-sulfur mineral inhibitor XKY012

Mix 50 grams of zinc sulfate, 50 grams of sodium sulfite, and 10 grams of hydroxyethyl cellulose, use a beaker as a container at normal temperature and pressure, use hot water above 60°C as a solvent, and stir with a magnetic stirrer for 20 to 30 minutes to obtain XKY012 solution.

2. Preparation of high-efficiency lead, gold and silver mineral collection foaming agent XK712

(1) With 100 grams of anhydrous sodium carbonate, 1000 grams of clear water, under normal temperature and pressure, use a beaker as a container, and stir with a magnetic stirrer for 5 to 10 minutes to obtain a 10% concentration sodium carbonate solution.

(2), 40 grams of dihydrocarbyl dithiophosphate, 30 grams of dianilino ammonium dithiophosphate, 20 grams of sodium diethyldithiocarbamate, and 10 grams of isoamyl xanthate were mixed, and the A beaker is used as a container, the above-mentioned 10% sodium carbonate is used as a solvent, and the XK712 solution is obtained by stirring with a magnetic stirrer for 40-60 minutes.

3. Mining process

The selected ores are high-sulfur complex low-grade lead-zinc sulfide ores containing pyrite, galena, sphalerite and associated silver. In minerals such as iron ore and chalcopyrite, the distribution characteristics are extremely complex; the raw ore contains 1.30% lead, 3.15% zinc, 22.49% sulfur, and 79.65g/t silver; the main metal minerals are galena and sphalerite , pyrite, chalcopyrite, silver tetrahedrite, etc., gangue minerals are mainly quartz, chlorite, sericite, hornblende, calcite, feldspar, etc. The ore was processed by the traditional lead-zinc priority flotation process, and the obtained lead concentrate contained 45.28% lead, 4.52% zinc, and 1620g/t silver, with a lead recovery rate of 83.23% and a silver recovery rate of 50.60%; the obtained zinc concentrate The ore contains 50.13% zinc and the zinc recovery rate is 84.77%; the obtained sulfur concentrate contains 42.37% sulfur and the sulfur recovery rate is 67.38%.

The selection steps are:

(1) Grinding the ore to obtain a grinding slurry; wherein the grinding fineness of the raw ore grinding is -0.074mm, and the particle size level content accounts for 80% of the total weight of the raw ore;

(2) carry out lead roughing after adjusting the flotation concentration of the grinding slurry obtained in step (1) to be 50%, to obtain lead rough concentrate and lead roughing tailings; wherein the lead roughing operation process conditions are: first add The zinc-sulfur inhibitor XKY012 is 500g/t, and the action time is 3min, and the collector XK712 is added at 50g/t, and the action time is 2min;

(3) The lead roughing tailings obtained in step (2) are subjected to lead scavenging twice, i.e. lead scavenging I and lead scavenging II, to obtain lead scavenging tailings and two lead scavenging ores, two lead scavenging Sweeping and mining returns to the previous layer in sequence; the process conditions for the two operations of lead sweeping are as follows: lead sweeping I operation adds collector XK712 at 20g/t, and the action time is 2min; lead sweeping II operation adds capture The receiving agent XK712 is 10g/t, and the action time is 2min;

(4) Carry out the lead concentrate that step (2) obtains to lead beneficiation twice, i.e. lead concentrate I and lead concentrate II, obtain lead concentrate and two lead concentrate middle ores, two lead concentrate middle ore Respectively return to the previous layer of operation in sequence; the process conditions of the secondary operation of lead selection are as follows: the zinc sulfur inhibitor XKY012 is added to the lead fine Ⅰ operation at 300g/t, and the action time is 3min; the lead fine Ⅱ operation adds the zinc sulfur inhibitor XKY012 to 200g/t, the action time is 3min;

(5) The lead scavenging tailings obtained in step (3) are subjected to zinc-sulfur mixed roughing for the first time to obtain zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rougher I tailings; The technological conditions of the beneficiation operation are as follows: add the slurry regulator lime 1000g/t, the action time is 3min, the activator copper sulfate is 300g/t, the action time is 3min, the collector butyl xanthate is 60g/t, the action time is 2min, Foaming agent 2# oil 10g/t, action time is 1min;

(6) Carry out the zinc-sulfur mixed roughing I tailings obtained in step (5) for the second mixed roughing of zinc and sulfur to obtain zinc-sulfur mixed rough concentrate II and zinc-sulfur mixed roughing II tailings; wherein the zinc-sulfur first The technical conditions of the secondary mixing and roughing operation are as follows: activator copper sulfate 50g/t is added, and the action time is 3min; collector butyl xanthate is 20g/t, and the action time is 2min;

(7) The zinc-sulfur mixed roughing II tailings obtained in step (6) are subjected to zinc-sulfur mixed scavenging for one time to obtain zinc-sulfur mixed flotation tailings and zinc-sulfur mixed scavenging ore, and the zinc-sulfur mixed scavenging ore is returned in sequence Go to the upper layer for operation; the technological conditions for the zinc-sulfur mixed sweeping operation are: add collector butyl xanthate 20g/t, and the action time is 2min;

(8) Combine the zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rough concentrate II obtained in step (5) and step (6) respectively and carry out zinc-sulfur separation and roughing to obtain zinc rough concentrate and zinc roughing tailings ore; among them, zinc-sulfur separation and roughing process conditions are as follows: add inhibitor lime 5000g/t, action time is 3min, activator copper sulfate 30g/t, action time is 3min, collector butyl xanthate 10g/t, The action time is 2 minutes;

(9) Zinc roughing tailings obtained in step (8) are carried out a zinc sweep to obtain sulfur concentrate and a zinc sweep, and the sequence of zinc sweep is returned to the previous layer of operation; wherein the zinc sweep process conditions For: adding collector butyl xanthate 10g/t to zinc sweeping operation, the action time is 2min;

(10) Carry out zinc concentration secondary to the zinc rough concentrate that step (9) obtains, obtain zinc concentrate and two zinc concentration medium ores, and two zinc concentration medium ores return to the operation of upper layer respectively sequentially; Among them, the process conditions of the secondary operation of zinc concentration are: 1000g/t of inhibitor lime is added to the zinc concentration Ⅰ operation, and the action time is 3 minutes; 500g/t of inhibitor lime is added to the zinc concentration Ⅱ operation, and the action time is 3 minutes.

The beneficiation results are shown in Table 2 below:

Table 2: Flotation Index (%)

continued:

The present invention has been described in detail above. The foregoing description is only a preferred embodiment of the present invention, and should not limit the implementation scope of the present invention. within the scope of the invention.

Claims (4)

1. a high-sulfur lead-zinc ore flotation separation process under a high-concentration environment, is characterized in that: carry out according to the following steps, (1) Ore grinding: grind the ore finely to obtain the ore grinding slurry; wherein the grinding fineness of the raw ore is -0.074mm, and the particle size grade content accounts for 60-80% of the total weight of the raw ore; (2) After adjusting the flotation concentration of the grinding slurry obtained in step (1), carry out lead roughing to obtain lead rough concentrate and lead roughing tailings; wherein the lead roughing operation process conditions are: first add zinc sulfur to inhibit The agent XKY012 is 500-1000g/t, and the action time is 3-5min, and the collector XK712 is added at 50-80g/t, and the action time is 2-3min; (3) The lead roughing tailings obtained in step (2) are subjected to lead scavenging twice, i.e. lead scavenging I and lead scavenging II, to obtain lead scavenging tailings and two lead scavenging ores, two lead scavenging Sweeping and mining return to the previous layer of operations in sequence; the process conditions for the two operations of lead sweeping are as follows: lead sweeping I operation adds collector XK712 at 20-30g/t, and the action time is 2-3min; lead sweeping In operation II, add collector XK712 at 10-20g/t, and the action time is 2-3min; (4) Carry out the lead concentrate that step (2) obtains to lead beneficiation twice, i.e. lead concentrate I and lead concentrate II, obtain lead concentrate and two lead concentrate middle ores, two lead concentrate middle ore Respectively return to the previous layer of operations in sequence; the process conditions of the secondary operation of lead selection are: the zinc-sulfur inhibitor XKY012 is added at 300-500g/t for the operation of lead concentration I, and the action time is 3-5min; The inhibitor XKY012 is 200-300g/t, and the action time is 3-5min; (5) The lead scavenging tailings obtained in step (3) are subjected to zinc-sulfur mixed roughing for the first time to obtain zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rougher I tailings; The technological conditions of the beneficiation operation are as follows: add the pulp regulator lime 500-1000g/t, the action time is 3-5min, the activator copper sulfate is 300-400g/t, the action time is 3-5min, the collector butyl xanthate 60- 100g/t, the action time is 2~3min, foaming agent 2# oil 10~20g/t, the action time is 1~2min; (6) Carry out the zinc-sulfur mixed roughing I tailings obtained in step (5) for the second mixed roughing of zinc and sulfur to obtain zinc-sulfur mixed rough concentrate II and zinc-sulfur mixed roughing II tailings; wherein the zinc-sulfur first The technical conditions of the secondary mixing and roughing operation are as follows: activator copper sulfate 50-80g/t is added, and the action time is 3-5 minutes; collector butyl xanthate is 20-30g/t, and the action time is 2-3 minutes; (7) The zinc-sulfur mixed roughing II tailings obtained in step (6) are subjected to zinc-sulfur mixed scavenging for one time to obtain zinc-sulfur mixed flotation tailings and zinc-sulfur mixed scavenging ore, and the zinc-sulfur mixed scavenging ore is returned in sequence Go to the upper layer for operation; the technological conditions for the zinc-sulfur mixed sweeping operation are: add collector butyl xanthate 20-30g/t, and the action time is 2-3min; (8) Combine the zinc-sulfur mixed rough concentrate I and zinc-sulfur mixed rough concentrate II obtained in step (5) and step (6) respectively and carry out zinc-sulfur separation and roughing to obtain zinc rough concentrate and zinc roughing tailings ore; among them, zinc-sulfur separation and roughing process conditions are as follows: add inhibitor lime 3000-5000g/t, action time is 3-5min, activator copper sulfate 30-50g/t, action time is 3-5min, collector Butyl xanthate 10~20g/t, the action time is 2~3min; (9) Zinc roughing tailings obtained in step (8) are carried out a zinc sweep to obtain sulfur concentrate and a zinc sweep, and the sequence of zinc sweep is returned to the previous layer of operation; wherein the zinc sweep process conditions For: adding collector butyl xanthate 10~15g/t to zinc sweeping operation, the action time is 2~3min; (10) Carry out zinc concentration secondary to the zinc rough concentrate that step (9) obtains, obtain zinc concentrate and two zinc concentration medium ores, and two zinc concentration medium ores return to the operation of upper layer respectively sequentially; Among them, the process conditions for the secondary operation of zinc refining are: adding inhibitor lime 1000-2000g/t in zinc refining Ⅰ operation, and the action time is 3-5min; ~5min; In steps (2) and (4), the zinc-sulfur inhibitor XKY012 is made of zinc sulfate, sodium sulfite, and hydroxyethyl cellulose, in a mass ratio of 1.0:(0.5-1.0):(0.1-0.2) Proportional mixing, under normal pressure, use a beaker as a container, hot water above 60°C as a solvent, and stir with a magnetic stirrer for 20 to 30 minutes to obtain it; In steps (2), (3), the collector XK712 is based on dihydrocarbyl dithiophosphate, dianilino ammonium dithiophosphate, sodium diethyldithiocarbamate, isoamyl xanthate As raw materials, mix according to the mass ratio of 4:3:2:1, use a beaker as a container at normal temperature and pressure, use a 10% sodium carbonate solution as a solvent, and stir with a magnetic stirrer for 40 to 60 minutes. 2. The flotation separation process for high-sulfur lead-zinc ore in a high-concentration environment according to claim 1, characterized in that: in step (2), the flotation concentration is 45-50%. 3. The flotation and separation process of high-sulfur lead-zinc ore in a high-concentration environment according to claim 1 is characterized in that: in step (5), the zinc-sulfur mixed roughing operation for the first time adds pulp regulator lime 500 ~ 1000g/t, adjust the pH value of the pulp to 8.5-9.5. 4. The flotation separation process of high-sulfur lead-zinc ore in a high-concentration environment according to claim 1, characterized in that: the collector XK712 also serves as a foaming agent.