CN113843049B - Short-process flotation separation method for complex high-sulfur lead-zinc polymetallic ore - Google Patents

Short-process flotation separation method for complex high-sulfur lead-zinc polymetallic ore Download PDF

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CN113843049B
CN113843049B CN202111130190.5A CN202111130190A CN113843049B CN 113843049 B CN113843049 B CN 113843049B CN 202111130190 A CN202111130190 A CN 202111130190A CN 113843049 B CN113843049 B CN 113843049B
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zinc
sulfur
lead
scavenging
acting
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CN113843049A (en
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周贺鹏
缪建成
罗仙平
陈如凤
杨志兆
汤成龙
张永兵
马斌
范寻
韩梦婷
胡继华
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Nanjing Yin Mao Lead Zinc Mine Co ltd
Jiangxi University of Science and Technology
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Nanjing Yin Mao Lead Zinc Mine Co ltd
Jiangxi University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/018—Mixtures of inorganic and organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/02—Collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/06—Depressants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly

Abstract

The invention provides a short-flow flotation separation method for complex high-sulfur lead-zinc polymetallic ores, which comprises the steps of raw ore grinding, lead roughing, lead scavenging, lead concentration, zinc-sulfur mixed roughing, zinc-sulfur mixed scavenging, zinc-sulfur mixed concentration, zinc-sulfur separation, zinc concentration, sulfur scavenging and the like, and finally lead concentrate, zinc concentrate and sulfur concentrate are obtained. The method can solve the problems of high separation difficulty, low separation efficiency, poor separation index, long flotation process, high production cost, high potential safety hazard and the like in the flotation separation and recovery of the complex high-sulfur lead-zinc polymetallic ore, and is energy-saving, environment-friendly, clean, efficient, simple to operate, high in adaptability, low in production cost, good in recovery effect, high in comprehensive utilization rate and suitable for popularization and application.

Description

Short-process flotation separation method for complex high-sulfur lead-zinc polymetallic ore
Technical Field
The invention belongs to the field of mineral separation, and particularly relates to a short-flow flotation separation method for complex high-sulfur lead-zinc polymetallic ores.
Background
Lead and zinc are a large amount of basic nonferrous metals necessary for national economic development, and support the national economic and technological development. The lead and zinc resources in China are rich, but the endowments of the resources are poor, the grade of the main metal of lead and zinc is low, the content of pyrite is extremely high, the types of the co-associated elements are more, and the development and utilization difficulty is extremely high. In recent years, the flotation separation technology of the high-sulfur lead-zinc polymetallic ore is greatly developed, and lead-zinc sulfide minerals are well separated. However, due to the complex ore properties, in order to improve the lead-zinc separation precision in production, a tedious flotation process has to be used, so that the equipment table sleeve and the production energy consumption are increased, the medicament dosage and the production cost are obviously increased, and the lead-zinc ore dressing efficiency is reduced.
Aiming at lead-zinc polymetallic sulphide ores, a lead-zinc preferential flotation process flow is generally adopted in industrial production so as to realize effective separation of lead-zinc main metal minerals. However, the pyrite mineral in the ore is complex in nature and extremely high in content, and often closely coexists with the lead-zinc mineral, in order to realize high-efficiency separation and comprehensive recovery of the pyrite mineral, the existing production mainly adopts lime as an inhibitor, the pyrite mineral is inhibited deeply in lead-zinc flotation operation, single lead and zinc concentrate is obtained, then the pyrite mineral is activated by sulfuric acid and copper sulfate, and the pyrite mineral is recovered from lead-zinc flotation tailings, so that the comprehensive recovery of lead, zinc and sulfur is realized. Although the process can obtain lead, zinc and sulfur concentrate products with higher grade, the flotation process is longer, the production energy consumption and the medicine consumption are high, and the used sulfuric acid strong corrosion agent causes the problems of inconvenient production, potential safety hazard and the like, so that a novel short-process flotation separation method which is safe, environment-friendly, efficient, good in separation effect, high in recovery index and low in production cost is urgently needed to be developed.
Disclosure of Invention
Aiming at the problems of high separation difficulty, low separation efficiency, long flotation process, high production energy consumption, large potential safety hazard, low comprehensive utilization rate and the like of the beneficiation and recovery of the complex high-sulfur lead-zinc polymetallic ore, the invention aims to provide a novel short-process flotation separation beneficiation method for the complex high-sulfur lead-zinc polymetallic ore, which is safe, environment-friendly, efficient, clean, stable, good in separation effect, strong in adaptability, high in recovery index and low in production cost.
The invention is realized by the following technical scheme, and the method for the short-flow flotation separation of the complex high-sulfur lead-zinc polymetallic ore is characterized by comprising the following steps of:
(1) Collecting and grinding lead-zinc raw ore;
(2) Carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings;
(3) Scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation;
(4) Concentrating the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation respectively;
(5) Performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings;
(6) Scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence;
(7) Performing mixed concentration on the zinc-sulfur mixed rough concentrate obtained in the step (5) for one time to obtain zinc-sulfur mixed concentrate and mixed concentrated middlings, and returning the mixed concentrated middlings to the zinc-sulfur mixed rough concentration operation I;
(8) Performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) to obtain zinc rough concentrate and sulfur rough concentrate;
(9) Concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively;
(10) Scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenging middlings, and sequentially returning the two scavenging middlings to the previous layer of operation respectively;
performing zinc-sulfur mixed roughing on the lead scavenging tailings twice in the step (5), performing scavenging on the zinc-sulfur mixed roughing tailings three times in the step (6), performing scavenging on the sulfur rough concentrate twice in the step (10), and adding a collecting agent LSP-03 for flotation of the high-sulfur lead-zinc polymetallic ore; the collecting agent LSP-03 for the flotation of the high-sulfur lead-zinc polymetallic ore is prepared by mixing and stirring three raw materials of sodium diamyl dithiocarbamate, O-butyl-N-3-propyl thiocarbamate and diacrylamine sodium acetate xanthate.
Preferably, in the step (1), the ground fineness of the ground raw ore is: the content of-0.074 mm accounts for 70-75%;
in the step (2), the lead roughing operation process conditions are as follows: adding 300-500g/t of inhibitor lime, adjusting the pH value of the ore pulp to 9-9.5, acting for 4-5 min, adding 1500-2000 g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 80-110 g/t of collecting agent ethidium and nitrogen, acting for 3-4 min, adding foaming agent 2 # 15-25 g/t of oil, and the action time is 1-2 min;
in the step (3), the process conditions of the three-time lead scavenging operation are as follows: adding 150-200 g/t of inhibitor lime into the scavenging I operation, acting for 4-5 min, adding 400-600g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 25-40 g/t of collecting agent ethion nitrogen, and acting for 3-4 min; adding 100-150 g/t of inhibitor lime into the scavenging II operation, acting for 4-5 min, adding 200-300 g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 15-25 g/t of collecting agent ethidium and azote, and acting for 3-4 min; adding 50-100 g/t of inhibitor lime into scavenging III operation, acting for 4-5 min, adding 100-150 g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 10-15 g/t of collecting agent ethidium and azote, and acting for 3-4 min;
in the step (4), the three-time lead concentration operation process conditions are as follows: adding 200-300 g/t of inhibitor lime into the fine I operation, wherein the action time is 4-5 min, and adding 600-800g/t of inhibitor zinc sulfate, wherein the action time is 4-5 min; adding inhibitor lime 150-200 g/t for 4-5 min, adding inhibitor zinc sulfate 400-600g/t for 4-5 min; adding inhibitor lime 100-150 g/t for 4-5 min, adding inhibitor zinc sulfate 300-500g/t for 4-5 min;
in the step (5), the two-time operation process conditions of the zinc-sulfur mixed roughing are as follows: adding 300-400 g/t of activating agent copper sulfate into the zinc-sulfur mixed roughing I operation, acting for 4-5 min, adding the collecting agent LSP-03 for the flotation of the high-sulfur lead-zinc polymetallic ore: 70-100 g/t, the action time is 3-4 min, and a foaming agent 2 is added # 15-25 g/t of oil, and the action time is 1-2 min; adding 150-200 g/t of activator copper sulfate in the zinc-sulfur mixed rough separation II operation, acting for 4-5 min, adding a collecting agent LSP-03: 50-70 g/t, the action time is 3-4 min, and a foaming agent 2 is added # 10-15 g/t of oil, and the action time is 1-2 min;
in the step (6), the three times of operation process conditions of zinc and sulfur mixed scavenging are as follows: adding 50-80 g/t of activator copper sulfate in the scavenging I operation, acting for 4-5 min, adding a collecting agent LSP-03: 40-50 g/t, and the action time is 3-4 min; adding 30-40 g/t of activator copper sulfate in the scavenging II operation, acting for 4-5 min, adding a collecting agent LSP-03: 25-35 g/t, and the action time is 3-4 min; adding 20-30 g/t of activating agent copper sulfate in the scavenging III operation, acting for 4-5 min, adding collecting agent LSP-03: 20-30 g/t, and the action time is 3-4 min;
in the step (8), the zinc-sulfur separation roughing process conditions are as follows: adding 2500-3000 g/t of inhibitor lime, adjusting the pH value of the ore pulp to 11.5-12, and acting for 4-5 min;
in the step (9), the two-time zinc concentration process conditions are as follows: adding inhibitor lime 400-600g/t in the fine I operation, and acting for 4-5 min; adding 300-500g/t of inhibitor lime into the refined II operation, and acting for 4-5 min;
in the step (10), the two-time sulfur scavenging process conditions are as follows: adding a collecting agent LSP-03 in the sweep I operation: 30-50 g/t, and the action time is 3-4 min; adding a collecting agent LSP-03 in the sweep II operation: 20-30 g/t and the action time is 3-4 min.
Preferably, the collecting agent LSP-03 for the flotation of the high-sulfur lead-zinc polymetallic ore is prepared by mixing sodium diamyl dithiocarbamate, O-butyl-N-3-propylthiocarbamate and diacrylamine sodium acetate xanthate serving as raw materials according to the mass ratio of (0.5-1.0) to (0.5-0.8) to (2.5-3.0), using a beaker as a reaction container at normal temperature and normal pressure, and stirring for 30-40 min.
The invention provides a method for short-flow flotation separation of complex high-sulfur lead-zinc polymetallic ores and a collecting agent LSP-03 for flotation of the high-sulfur lead-zinc polymetallic ores, which have the following technical characteristics:
(1) Aiming at the problems of complex imbedding relation of zinc and pyrite, uneven imbedding granularity, similar floatability, difficult flotation separation and the like existing in complex high-sulfur lead-zinc polymetallic ores, the invention researches and develops the high-efficiency collecting agent LSP-03 for mixed flotation of zinc-sulfur minerals and solves the problems of difficult comprehensive recovery of zinc and sulfur, low separation efficiency and the like of the complex high-sulfur lead-zinc polymetallic ores caused by low target mineral inclusion grade, fine imbedding granularity and high intergrowth degree. After the lead minerals are preferentially sorted and recovered, the zinc-sulfur minerals are synchronously recovered by flotation under the condition of neutral or low-alkaline ore pulp by adopting a collecting agent LSP-03, the bottleneck of efficiently recovering the zinc minerals by a lime-free system is broken through, the problems of long flow, high energy consumption, large dosage, high operation difficulty and the like caused by a lead-zinc-sulfur preferential flotation process are solved, the problems of potential safety hazard and high operation difficulty caused by the use of strong corrosive agents such as concentrated sulfuric acid and the like are avoided, and the high-efficiency, clean, low-cost and short-flow flotation recovery of the lead-zinc-sulfur target minerals is realized.
(2) The collecting agent LSP-03 disclosed by the invention has good collecting capacity, can be strongly adsorbed on the surface of zinc-sulfur minerals to enable the zinc-sulfur minerals to be hydrophobic and float, enhances the monomer dissociation difference and the recovery of fine particle zinc-sulfur minerals, and improves the comprehensive recovery rate of high-sulfur lead-zinc polymetallic ores; meanwhile, the separated zinc-sulfur mineral has the characteristics of strong selectivity and high flotation speed, can form multi-ring adsorption on the surface of the zinc sulfide mineral, avoids the influence of fine mud and other gangue minerals on the grade of the concentrate, improves the zinc-sulfur separation efficiency, and provides a new technical support for realizing the high-efficiency recovery, high-selectivity separation, cleaning and low-cost mineral separation production of the complex high-sulfur lead-zinc polymetallic ore. The beneficiation method provided aiming at the complex high-sulfur lead-zinc polymetallic ores is an invention which is not disclosed and is unique and innovative in the technical field of beneficiation, and is a novel method for the complex high-sulfur lead-zinc polymetallic ores through short-flow flotation separation beneficiation, which has the advantages of environmental protection, high efficiency, cleanness, stability, good separation effect, high adaptability, high recovery index and low production cost.
Compared with the prior art, the invention has the advantages that:
(1) the LSP-03 is a high-efficiency collecting agent for high-sulfur lead-zinc polymetallic ores, has the characteristics of high selectivity, high flotation speed and strong collecting capacity, and can effectively solve the problem of comprehensive recovery of lead, zinc and sulfur in the complex high-sulfur lead-zinc polymetallic ores.
(2) The efficient collecting agent LSP-03 can be used for mixed flotation of zinc-sulfur minerals under neutral or low-alkaline conditions, the use of activating agent concentrated sulfuric acid can be omitted, the potential safety hazard of production is greatly reduced, and the requirements of green mine construction are met.
(3) The preparation method of the efficient collecting agent LSP-03 is simple, has wide raw material sources, and is beneficial to industrial production and application.
(4) The beneficiation method for the short-flow flotation separation of the complex high-sulfur lead-zinc polymetallic ore can realize the high-efficiency separation and the harmonic recovery of lead, zinc and sulfur, has the advantages of simple process flow, high separation efficiency, low production cost and good separation index, and is beneficial to industrial production.
Drawings
FIG. 1 is a flow chart of the steps of the short-flow flotation separation method for the complex high-sulfur lead-zinc polymetallic ore.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
50g of sodium diamyl dithiocarbamate, 70g of O-butyl-N-3-propyl thiocarbamate and 280g of bisallylamine sodium acetate xanthate are mixed, and stirred for 30min by using a beaker as a reaction container at normal temperature and under normal pressure and a magnetic stirrer to obtain the collecting agent LSP-03.
Example 2
80g of sodium diamyl dithiocarbamate, 60g of O-butyl-N-3-propyl thiocarbamate and 270g of bisallylamine sodium acetate xanthate are mixed, a beaker is used as a reaction container at normal temperature and normal pressure, and a magnetic stirrer is used for stirring for 30min to obtain the collecting agent LSP-03.
Example 3
70g of sodium diamyl dithiocarbamate, 70g of O-butyl-N-3-propyl thiocarbamate and 250g of bisallylamine sodium acetate xanthate are mixed, a beaker is used as a reaction container at normal temperature and normal pressure, and a magnetic stirrer is used for stirring for 30min to obtain the collecting agent LSP-03.
Example 4
The selected raw ore contains 1.09% of lead, 2.23% of zinc and 24.67% of sulfur, main minerals comprise galena, sphalerite, pyrite, pyrrhotite, chalcopyrite, limonite, quartz, feldspar, chlorite, calcite and the like, and the mineral embedding characteristics in the ore are complex, the embedding granularity is not uniform, fine particles are taken as main particles, and the monomer dissociation is poor. The lead concentrate obtained by adopting the traditional 'lead-zinc-sulfur preferential flotation' high-alkali process contains 46.25% of lead, the lead recovery rate is 77.94%, the obtained zinc concentrate contains 45.72% of zinc, the zinc recovery rate is 81.39%, the obtained sulfur concentrate contains 38.48% of sulfur, and the sulfur recovery rate is 66.57%.
The complex high-sulfur lead-zinc polymetallic ore is separated by adopting the novel short-flow flotation separation beneficiation method for the complex high-sulfur lead-zinc polymetallic ore and the collecting agent LSP-03 in the embodiment 2, and the separation steps are as follows:
(1) Collecting and grinding lead-zinc raw ore; wherein the grinding fineness of the ground raw ore is as follows: -0.074mm content is 70%;
(2) Carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings; wherein the lead roughing operation process conditions are as follows: adding inhibitor lime 400g/t, adjusting pH of ore pulp to 9, acting for 5min, inhibitor zinc sulfate 1700g/t, acting for 5min, collecting agent ethyl sulfur nitrogen 100g/t, acting for 3min, adding foaming agent 2 # Oil 20g/t, action time 2min;
(3) Scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation; wherein the technological conditions of the three times of scavenging operation are as follows: adding 200g/t of inhibitor lime into the scavenging I operation, wherein the action time is 5min, 500g/t of inhibitor zinc sulfate, 5min, 30g/t of collecting agent ethion and nitrogen, and 3min; adding 100g/t of inhibitor lime into the scavenging II operation, wherein the action time is 5min, 200g/t of inhibitor zinc sulfate, the action time is 5min, 20g/t of collecting agent ethion nitrogen, and the action time is 3min; adding 50g/t of inhibitor lime for 5min, 100g/t of inhibitor zinc sulfate for 5min, 15g/t of collecting agent ethyl sulfur nitrogen for 3min;
(4) Carrying out concentration on the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation; wherein the three-time operation process conditions of lead concentration are as follows: adding 250g/t of inhibitor lime into the fine I operation, wherein the action time is 5min, 700g/t of inhibitor zinc sulfate and the action time is 5min; adding inhibitor lime 150g/t for 5min, inhibitor zinc sulfate 500g/t for 5min; adding inhibitor lime 100g/t for fine III operation, acting for 5min, inhibitor zinc sulfate 300g/t, and acting for 5min;
(5) Performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; wherein the two-time operation process conditions of the zinc-sulfur mixed roughing are as follows: adding 350g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation I operation, wherein the action time is 5min, and the collecting agent LSP-03:90g/t, action time 3min, adding foaming agent 2 # Oil 20g/t, action time 2min; adding 160g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation II operation, wherein the action time is 5min, and the collecting agent LSP-03:60g/t, action time of 3min, adding foaming agent 2 # Oil 10g/t, action time 2min;
(6) Scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence; wherein the technological conditions of the three times of scavenging operation are as follows: 60g/t of activating agent copper sulfate is added in the scavenging I operation, the action time is 5min, and the collecting agent LSP-03:45g/t, and the action time is 3min; adding 30g/t of activating agent copper sulfate in the scavenging II operation, wherein the action time is 5min, and the collecting agent LSP-03:30g/t, and the action time is 3min; adding 20g/t of activating agent copper sulfate in the scavenging III operation, wherein the action time is 5min, and the collecting agent LSP-03:25g/t, and the action time is 3min;
(7) Performing mixed concentration on the zinc-sulfur mixed rough concentrate obtained in the step (5) for one time to obtain zinc-sulfur mixed concentrate and mixed concentrated middlings, and returning the mixed concentrated middlings to the zinc-sulfur mixed rough concentration operation I;
(8) Performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) once to obtain zinc rough concentrate and sulfur rough concentrate; wherein the process conditions of the zinc-sulfur separation and rough concentration are as follows: adding 3000g/t of inhibitor lime, adjusting the pH value of the ore pulp to 12, and acting for 5min;
(9) Concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively; wherein the two-time selection process conditions are as follows: adding 500g/t of inhibitor lime in the fine I operation, and acting for 5min; adding 350g/t of inhibitor lime in the fine II operation, and acting for 5min;
(10) Scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenged middlings, and sequentially returning the two scavenged middlings to the previous layer of operation respectively; wherein the two-time scavenging process conditions are as follows: adding a collecting agent LSP-03 in the sweep I operation: 40g/t, and the action time is 3min; adding a collecting agent LSP-03 in the sweep II operation: 30g/t, and the action time is 3min;
the lead concentrate obtained in the example contains 50.62% of lead, the lead recovery rate is 81.65%, the zinc concentrate obtained contains 53.43% of zinc, the zinc recovery rate is 86.17%, the sulfur concentrate obtained contains 47.65% of sulfur, and the sulfur recovery rate is 80.27%.
Example 5
The selected raw ores contain 1.38% of lead, 2.69% of zinc and 22.57% of sulfur, main minerals comprise galena, sphalerite, pyrite, pyrrhotite, magnetite, quartz, muscovite, calcite, dolomite, kaolinite, pyroxene and the like, and the minerals in the ores have complex mineral laying characteristics, uneven laying granularity, mainly fine particles and poor monomer dissociation. The lead concentrate obtained by adopting the traditional lead-zinc-sulfur mixed flotation process contains 44.25 percent of lead, the lead recovery rate is 72.69 percent, the obtained zinc concentrate contains 47.29 percent of zinc, the zinc recovery rate is 77.68 percent, the obtained sulfur concentrate contains 40.37 percent of sulfur, and the sulfur recovery rate is 70.27 percent.
The complex high-sulfur lead-zinc polymetallic ore is separated by adopting the novel short-flow flotation separation beneficiation method for the complex high-sulfur lead-zinc polymetallic ore and the collecting agent LSP-03 in the embodiment 1, and the separation steps are as follows:
(1) Collecting and grinding lead-zinc raw ore; wherein the grinding fineness of the ground raw ore is as follows: -0.074mm content of 75%;
(2) Carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings; wherein the lead roughing operation process conditions are as follows: adding inhibitor lime 450g/t, adjusting pH of ore pulp to 9.3, acting for 5min, inhibitor zinc sulfate 1600g/t, acting for 5min, collecting agent ethyl sulfur nitrogen 90g/t, acting for 3min, adding foaming agent 2 # Oil 18g/t, action time 2min;
(3) Scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation; wherein the technological conditions of the three times of scavenging operation are as follows: adding 180g/t of inhibitor lime in the scavenging I operation, wherein the action time is 5min, 600g/t of inhibitor zinc sulfate, 5min, 30g/t of collecting agent ethion and nitrogen, and 3min; adding 100g/t of inhibitor lime into the scavenging II operation, wherein the action time is 5min, 200g/t of inhibitor zinc sulfate, the action time is 5min, 15g/t of collecting agent ethion nitrogen, and the action time is 3min; adding 50g/t of inhibitor lime into scavenging III operation, acting for 5min, 100g/t of inhibitor zinc sulfate, acting for 5min, 15g/t of collecting agent ethion nitrogen, and acting for 3min;
(4) Carrying out concentration on the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation; wherein the three-time operation process conditions of lead concentration are as follows: 300g/t of inhibitor lime is added in the fine I operation, the action time is 5min, 650g/t of inhibitor zinc sulfate and the action time is 5min; adding 180g/t of inhibitor lime in the fine II operation, acting for 5min, adding 450g/t of inhibitor zinc sulfate, and acting for 5min; adding inhibitor lime 100g/t for fine III operation, acting for 5min, inhibitor zinc sulfate 300g/t, and acting for 5min;
(5) Performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; wherein the two-time operation process conditions of the zinc-sulfur mixed roughing are as follows: adding 320g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation I operation, wherein the action time is 5min, and the collecting agent LSP-03:100g/t, action time 3min, adding foaming agent 2 # 22g/t of oil, and the action time is 2min; adding 170g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation II operation, wherein the action time is 5min, and the collecting agent LSP-03:65g/t, action time of 3min, adding foaming agent 2 # 15g/t of oil, and the action time is 2min;
(6) Scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence; wherein the technological conditions of the three times of scavenging operation are as follows: 55g/t of activating agent copper sulfate is added in the scavenging I operation, the action time is 5min, and the collecting agent LSP-03:40g/t, and the action time is 3min; adding 35g/t of activating agent copper sulfate in the scavenging II operation, wherein the action time is 5min, and the collecting agent LSP-03:25g/t, and the action time is 3min; adding 20g/t of activating agent copper sulfate in the scavenging III operation, wherein the action time is 5min, and the collecting agent LSP-03:20g/t, and the action time is 3min;
(7) Performing mixed concentration on the zinc-sulfur mixed rough concentrate obtained in the step (5) for one time to obtain zinc-sulfur mixed concentrate and mixed concentrated middlings, and returning the mixed concentrated middlings to the zinc-sulfur mixed rough concentration operation I;
(8) Performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) once to obtain zinc rough concentrate and sulfur rough concentrate; wherein the process conditions of zinc-sulfur separation and roughing are as follows: adding 2800g/t of inhibitor lime, adjusting the pH value of the ore pulp to 11.9, and acting for 5min;
(9) Concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively; wherein the two-time selection process conditions are as follows: adding 450g/t of inhibitor lime in the fine I operation, and acting for 5min; adding 300g/t of inhibitor lime in the fine II operation, and acting for 5min;
(10) Scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenging middlings, and sequentially returning the two scavenging middlings to the previous layer of operation respectively; wherein the two-time scavenging process conditions are as follows: adding a collecting agent LSP-03 in the sweep I operation: 30g/t, and the action time is 3min; adding a collecting agent LSP-03 in the sweep II operation: 25g/t, and the action time is 3min;
the lead concentrate obtained in the example contains 45.08% of lead, the lead recovery rate is 76.94%, the zinc concentrate obtained contains 51.22% of zinc, the zinc recovery rate is 86.27%, and the sulfur concentrate obtained contains 43.25% of sulfur and the sulfur recovery rate is 78.49%.
Example 6
The selected raw ore contains 0.92% of lead, 2.81% of zinc and 20.45% of sulfur, the main minerals comprise galena, sphalerite, willemite, pyrite, pyrrhotite, ferromanganese, siderite, galena, quartz, calcite, dolomite, kaolinite, amphibole and the like, and the mineral in the ore has complex imbedding characteristics, uneven imbedding granularity, mainly fine grains and poor monomer dissociation. Lead concentrate obtained by adopting a traditional 'partial lead-zinc mixed preferential flotation' high-alkali process contains 50.89% of lead and has a lead recovery rate of 69.79%, zinc contained in the obtained zinc concentrate is 45.37%, a zinc recovery rate of 72.65%, sulfur contained in the obtained sulfur concentrate is 44.37%, and a sulfur recovery rate of 73.31%.
The complex high-sulfur lead-zinc polymetallic ore is separated by adopting the novel short-flow flotation separation beneficiation method for the complex high-sulfur lead-zinc polymetallic ore and the collecting agent LSP-03 in the embodiment 3, and the separation steps are as follows:
(1) Collecting and grinding lead-zinc raw ore; wherein the grinding fineness of the ground raw ore is as follows: a content of-0.074 mm of 73%;
(2) Carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings; wherein the lead roughing operation process conditions are as follows: adding 450g/t of inhibitor lime, adjusting the pH value of the ore pulp to 9.5, acting for 5min, and adding zinc sulfate as inhibitor1900g/t, action time of 5min, collecting agent ethyl sulfur nitrogen 110g/t, action time of 3min, adding foaming agent 2 # Oil 20g/t, action time 2min;
(3) Scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation; wherein the technological conditions of the three times of scavenging operation are as follows: 150g/t of inhibitor lime is added in the scavenging I operation, the action time is 5min, 450g/t of inhibitor zinc sulfate, the action time is 5min, 35g/t of collecting agent ethion nitrogen, and the action time is 3min; adding 150g/t of inhibitor lime into the scavenging II operation, wherein the action time is 5min, 300g/t of inhibitor zinc sulfate, 5min, 22g/t of collecting agent ethion and nitrogen, and the action time is 3min; adding 50g/t of inhibitor lime for 5min, 150g/t of inhibitor zinc sulfate for 5min, 15g/t of collecting agent ethyl sulfur nitrogen for 3min;
(4) Concentrating the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation respectively; wherein the three-time operation process conditions of lead concentration are as follows: 300g/t of inhibitor lime is added in the fine I operation, the action time is 5min, 800g/t of inhibitor zinc sulfate, and the action time is 5min; adding 200g/t of inhibitor lime in the fine II operation, acting for 5min, 550g/t of inhibitor zinc sulfate, and acting for 5min; adding inhibitor lime 150g/t for fine III operation, acting for 5min, inhibitor zinc sulfate 400g/t, and acting for 5min;
(5) Performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; wherein the two-time operation process conditions of the zinc-sulfur mixed roughing are as follows: adding 300g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation I operation, wherein the action time is 5min, and the collecting agent LSP-03:100g/t, action time 3min, adding foaming agent 2 # 15g/t of oil, and the action time is 2min; adding 170g/t of activating agent copper sulfate in the zinc-sulfur mixed rough separation II operation, wherein the action time is 5min, and the collecting agent LSP-03:60g/t, action time of 3min, adding foaming agent 2 # Oil 12g/t, action time 2min;
(6) Scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence; wherein the technological conditions of the three times of scavenging operation are as follows: 60g/t of activating agent copper sulfate is added in the scavenging I operation, the action time is 5min, and the collecting agent LSP-03:45g/t, and the action time is 3min; adding 40g/t of activating agent copper sulfate in the scavenging II operation, wherein the action time is 5min, and the collecting agent LSP-03:30g/t, and the action time is 3min; 25g/t of activating agent copper sulfate is added in the scavenging III operation, the action time is 5min, and the collecting agent LSP-03:20g/t, and the action time is 3min;
(7) Performing mixed concentration on the zinc-sulfur mixed rough concentrate obtained in the step (5) for one time to obtain zinc-sulfur mixed concentrate and mixed concentrated middlings, and returning the mixed concentrated middlings to the zinc-sulfur mixed rough concentration operation I;
(8) Performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) once to obtain zinc rough concentrate and sulfur rough concentrate; wherein the process conditions of the zinc-sulfur separation and rough concentration are as follows: adding 2700g/t of inhibitor lime, adjusting the pH value of the ore pulp to 12, and acting for 5min;
(9) Concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively; wherein the two-time selection process conditions are as follows: adding 500g/t of inhibitor lime in the fine I operation, and acting for 5min; adding 380g/t of inhibitor lime in the fine II operation, and acting for 5min;
(10) Scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenging middlings, and sequentially returning the two scavenging middlings to the previous layer of operation respectively; wherein the two-time scavenging process conditions are as follows: adding a collecting agent LSP-03 in the sweep I operation: 30g/t, and the action time is 3min; adding a collecting agent LSP-03 in the sweep II operation: 22g/t, and the action time is 3min;
the lead concentrate obtained in the example contains 49.60% of lead, the lead recovery rate is 77.22%, the zinc concentrate obtained contains 52.42% of zinc, the zinc recovery rate is 83.61%, and the sulfur concentrate obtained contains 46.83% of sulfur and 79.54% of sulfur.
Those skilled in the art will appreciate that those matters not described in detail herein are well within the skill of the art.
In a word, the invention provides a short-process flotation separation method for complex high-sulfur lead-zinc polymetallic ores, which comprises the steps of raw ore grinding, lead roughing, lead scavenging, lead concentrating, zinc-sulfur mixed roughing, zinc-sulfur mixed scavenging, zinc-sulfur mixed concentrating, zinc-sulfur separation, zinc concentrating, sulfur scavenging and the like, so that lead concentrate, zinc concentrate and sulfur concentrate are finally obtained. The beneficiation method can solve the problems of high separation difficulty, low separation efficiency, poor separation index, long flotation process, high production cost, high potential safety hazard and the like in the flotation separation and recovery of the complex high-sulfur lead-zinc polymetallic ores, and is a novel short-process flotation separation beneficiation method for the lead-zinc polymetallic sulfide ores, which is energy-saving, environment-friendly, clean, efficient, simple to operate, high in adaptability, low in production cost, good in recovery effect and high in comprehensive utilization rate, and is suitable for popularization and application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. A method for short-flow flotation separation of complex high-sulfur lead-zinc polymetallic ores is characterized in that the steps of the ore dressing process comprise:
(1) Collecting and grinding lead-zinc raw ore;
(2) Carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings;
(3) Scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation;
(4) Carrying out concentration on the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation;
(5) Performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings;
(6) Scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence;
(7) Performing mixed concentration on the zinc-sulfur mixed rough concentrate obtained in the step (5) for one time to obtain zinc-sulfur mixed concentrate and mixed concentrated middlings, and returning the mixed concentrated middlings to the zinc-sulfur mixed rough concentration operation I;
(8) Performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) to obtain zinc rough concentrate and sulfur rough concentrate;
(9) Concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively;
(10) Scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenging middlings, and sequentially returning the two scavenging middlings to the previous layer of operation respectively;
performing zinc-sulfur mixed roughing on the lead scavenging tailings twice in the step (5), performing scavenging on the zinc-sulfur mixed roughing tailings three times in the step (6), performing scavenging on the sulfur rough concentrate twice in the step (10), and adding the collecting agent for the flotation of the high-sulfur lead-zinc polymetallic ore; the collecting agent for the flotation of the high-sulfur lead-zinc polymetallic ore is prepared by mixing and stirring three raw materials of sodium diamyl dithiocarbamate, O-butyl-N-3-propyl thiocarbamate and bisallylamine sodium acetate xanthate;
the mass ratio of the sodium diamyldithiocarbamate, the O-butyl-N-3-propylthiocarbamate and the sodium diacrylamine xanthate is (0.5-1.0): (0.5-0.8): 2.5-3.0).
2. The short flow flotation separation process of claim 1, wherein:
the step (5) is specifically as follows: performing zinc-sulfur mixed roughing on the lead scavenging tailings obtained in the step (3) twice, and combining to obtain zinc-sulfur mixed rough concentrate and zinc-sulfur mixed rough tailings; the two-time operation process conditions of the zinc-sulfur mixed roughing are as follows: adding in operation I of zinc-sulfur mixed roughing300-400 g/t of reagent copper sulfate, 4-5 min of action time, collecting agent for flotation of high-sulfur lead-zinc polymetallic ore: 70-100 g/t, the action time is 3-4 min, and a foaming agent 2 is added # 15-25 g/t of oil, and the action time is 1-2 min; adding 150-200 g/t of activator copper sulfate in the zinc-sulfur mixed roughing II operation, wherein the action time is 4-5 min, and adding the collecting agent for the high-sulfur lead-zinc polymetallic ore flotation: 50-70 g/t, the action time is 3-4 min, and a foaming agent 2 is added # 10-15 g/t of oil and 1-2 min of action time.
3. The short pass flotation separation process of claim 1, wherein:
the step (6) is specifically as follows: scavenging the zinc-sulfur mixed roughing tailings obtained in the step (5) for three times to obtain tailings and three scavenged middlings, wherein the three scavenged middlings respectively return to the previous layer of operation in sequence; wherein the technological conditions of the three times of scavenging operation are as follows: adding 50-80 g/t of activating agent copper sulfate in the scavenging I operation, acting for 4-5 min, adding the collecting agent for the flotation of the high-sulfur lead-zinc polymetallic ore: 40-50 g/t, and the action time is 3-4 min; adding 30-40 g/t of activator copper sulfate in the scavenging II operation, acting for 4-5 min, adding the collecting agent for the flotation of the high-sulfur lead-zinc polymetallic ore: 25-35 g/t, and the action time is 3-4 min; adding 20-30 g/t of activating agent copper sulfate in the scavenging III operation, acting for 4-5 min, adding the collecting agent for the flotation of the high-sulfur lead-zinc polymetallic ore: 20-30 g/t, and the action time is 3-4 min.
4. The short flow flotation separation process of claim 1, wherein:
the step (10) is specifically as follows: scavenging the sulfur rough concentrate obtained in the step (8) twice to obtain sulfur concentrate and two scavenging middlings, and sequentially returning the two scavenging middlings to the previous layer of operation respectively; wherein the process conditions of twice scavenging are as follows: i, adding a collecting agent for flotation of high-sulfur lead-zinc polymetallic ores in sweeping operation: 30-50 g/t, and the action time is 3-4 min; adding a collecting agent for flotation of the high-sulfur lead-zinc polymetallic ore in sweep II operation: 20-30 g/t and the action time is 3-4 min.
5. The short pass flotation separation process of claim 1, wherein:
the step (2) is specifically as follows: carrying out lead roughing on the ground ore pulp to obtain lead rough concentrate and lead rough tailings; wherein the lead roughing operation process conditions are as follows: adding 300-500g/t of inhibitor lime, adjusting the pH value of the ore pulp to 9-9.5, acting for 4-5 min, adding 1500-2000 g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 80-110 g/t of collecting agent ethidium and nitrogen, acting for 3-4 min, adding foaming agent 2 # 15-25 g/t of oil, and the action time is 1-2 min;
the step (3) is specifically as follows: scavenging the lead roughing tailings obtained in the step (2) for three times to obtain lead scavenging tailings and three scavenging middlings, wherein the three scavenging middlings respectively return to the previous layer of operation; wherein the technological conditions of the three times of scavenging operation are as follows: adding 150-200 g/t of inhibitor lime into the scavenging I operation, acting for 4-5 min, adding 400-600g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 25-40 g/t of collecting agent ethion nitrogen, and acting for 3-4 min; adding inhibitor lime into the scavenging II for 100-150 g/t, acting for 4-5 min, adding inhibitor zinc sulfate into the scavenging II for 200-300 g/t, acting for 4-5 min, adding collecting agent ethidium and nitrogen into the scavenging II for 15-25 g/t, and acting for 3-4 min; adding 50-100 g/t of inhibitor lime into scavenging III operation, acting for 4-5 min, adding 100-150 g/t of inhibitor zinc sulfate, acting for 4-5 min, adding 10-15 g/t of collecting agent ethidium and azote, and acting for 3-4 min;
the step (4) is specifically as follows: concentrating the lead rough concentrate obtained in the step (2) for three times to obtain lead concentrate and three concentrated middlings, and sequentially returning the three concentrated middlings to the previous layer of operation respectively; wherein the three-time operation process conditions of lead concentration are as follows: adding 200-300 g/t of inhibitor lime into the fine I operation, wherein the action time is 4-5 min, and adding 600-800g/t of inhibitor zinc sulfate, wherein the action time is 4-5 min; adding inhibitor lime 150-200 g/t for 4-5 min, adding inhibitor zinc sulfate 400-600g/t for 4-5 min; adding inhibitor lime into refined III for 100-150 g/t and acting for 4-5 min, and adding inhibitor zinc sulfate for 300-500g/t and acting for 4-5 min.
6. The short flow flotation separation process of claim 1, wherein:
the step (8) is specifically as follows: performing zinc-sulfur separation and roughing on the zinc-sulfur bulk concentrate obtained in the step (7) to obtain zinc rough concentrate and sulfur rough concentrate; wherein the process conditions of the zinc-sulfur separation and rough concentration are as follows: adding 2500-3000 g/t of inhibitor lime, adjusting the pH value of the ore pulp to 11.5-12, and acting for 4-5 min;
the step (9) is specifically as follows: concentrating the zinc rough concentrate obtained in the step (8) twice to obtain zinc concentrate and two concentrated middlings, and sequentially returning the two concentrated middlings to the previous layer of operation respectively; wherein the two-time selection process conditions are as follows: adding inhibitor lime 400-600g/t in the fine I operation, and acting for 4-5 min; 300-500g/t of inhibitor lime is added in the fine II operation, and the action time is 4-5 min.
7. The short flow flotation separation process of claim 1, wherein:
the step (1) is specifically as follows: collecting and grinding lead-zinc raw ore; wherein the grinding fineness of the ground raw ore is as follows: the content of-0.074 mm accounts for 70-75%.
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