CN108837950B - Pyrite composite inhibitor and application thereof - Google Patents

Pyrite composite inhibitor and application thereof Download PDF

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CN108837950B
CN108837950B CN201810548647.6A CN201810548647A CN108837950B CN 108837950 B CN108837950 B CN 108837950B CN 201810548647 A CN201810548647 A CN 201810548647A CN 108837950 B CN108837950 B CN 108837950B
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pyrite
lead
composite inhibitor
sulfur
inhibitor
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CN108837950A (en
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杨林
梁溢强
简胜
罗进
胥福顺
赵华科
谢立志
阚赛琼
宋涛
张晶
吴顺江
李广利
何志宏
刘鹏
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YILIANG CHIHONG MINING INDUSTRY Co.,Ltd.
Kunming Metallurgical Research Institute
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Yiliang Chihong Mining Industry Co ltd
Kunming Metallurgical Research Institute
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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
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/002—Inorganic 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
    • B03D2201/06—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

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  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention discloses a pyrite composite inhibitor and application thereof, wherein the pyrite composite inhibitor is composed of two or more of sodium dimethyldithiocarbamate, sodium thiosulfate, disodium ethylene diamine tetraacetate and sodium sulfite. The application is the application of the pyrite composite inhibitor in lead-sulfur separation of lead-sulfur bulk concentrate. The invention has the following typical advantages: (1) the composite inhibitor and the use method thereof have obvious inhibition effect on pyrite, small inhibition effect on main metal and obvious separation effect. (2) The composite inhibitor is easy to dissolve in water, accurate in preparation, addition and flow control, and easy to stabilize the process and technical indexes in the production process. (3) The composite inhibitor has the advantages of small dosage, stable performance and no pollution, and can realize the full replacement of lime.

Description

Pyrite composite inhibitor and application thereof
Technical Field
The invention belongs to the technical field of mineral dressing metallurgy, and particularly relates to a pyrite composite inhibitor and application thereof.
Background
Pyrite exists in almost all non-ferrous metal sulfide ore deposits, and the common problem faced by high-sulfur polymetallic ore deposits is that the flotation separation of valuable metal minerals and pyrite directly influences the grade and recovery rate of main metal concentrate due to the good or bad separation effect.
At present, the industrial production uses and researches more pyrite inhibitors, and particularly the pyrite inhibitors in the flotation process of lead-zinc-sulfur separation can be divided into three major categories, namely inorganic inhibitors, oxidation-reduction agents and organic inhibitors.
First, lime, cyanide, sodium sulfide and other soluble sulfides, sulfur dioxide, dichromate, potassium permanganate, calcium hypochlorite, etc. are inorganic inhibitors that are used in large amounts. Lime is the inhibitor of pyrite which is most widely applied and used at present, and is widely used in lead-sulfur separation, copper-sulfur separation, molybdenum-sulfur separation and even coal-sulfur separation processes. The method is a primary choice of a flotation reagent system of the pyrite-containing sulfide ore because of the characteristics of wide sources, low cost, low requirement on flotation operation and the like. Although the lime can effectively inhibit the pyrite, a series of problems exist in the production, which are mainly shown in that the lime consumption is large, the production process is complicated due to the fact that milk must be made, foams are sticky, the quality of concentrate is influenced by the entrained slime, the lime is easy to scale, solidify and block pipelines, the production operation is not facilitated, and the indexes are stable; secondly, after the pyrite is inhibited by lime, the pyrite is difficult to float; therefore, lime has different degrees of inhibition effects on precious metals such as gold, silver, molybdenum and the like in the ore, and is not beneficial to comprehensive recovery of the precious metals. The cyanide is an effective inhibitor of sulfide minerals, and because the cyanide is a highly toxic substance and is easy to dissolve in noble metals, the cyanide-free and cyanide-less process is the current development direction of lead-zinc ore dressing in China. Other inorganic inhibitors have the disadvantages of poor inhibition ability or selectivity.
Secondly, the oxidation-reduction agent realizes the suppression of the sulfide ore under the oxidation or reduction atmosphere by adjusting the pulp potential. Many studies have shown that under certain conditions H202The inhibiting mechanism is that the surface of the pyrite is oxidized to generate hydrophilic substances under the oxidizing atmosphere by adjusting the pulp potential through the oxidant, so that the pyrite is inhibited. SO (SO)2Reducing agents such as sulfite, sodium sulfide, sodium hydrosulfite and the like can inhibit pyrite, and the action mechanism is that the reducing agents adjust the pulp potential to desorb the xanthate on the surface of the mineral under the reducing atmosphere so as to inhibit pyrite. The inhibitor has the defects that the inhibitor can inhibit galena, blende and pyrite in large amount, and the inhibitor has insufficient inhibiting effect in small amount, poor selectivity and difficult use.
Thirdly, the organic inhibitor and the small molecular inhibitor are mainly classified into organic carboxylic acids, nitrogenous compounds and mercapto compound-containing small molecular organic inhibitors; the macromolecular organic inhibitor has strong inhibiting ability, many types of hydrophilic and solid functional groups, wide sources, low price, no toxicity and better application prospect in production. Sodium humate, polysaccharide starch, sodium lignosulfonate and polysaccharide xanthate all belong to macromolecular organic inhibitors, and the most commonly used sodium humate is at present. Whether the inhibitor is a small-molecule inhibitor or a large-molecule inhibitor, the difference of the inhibition effect of the inhibitor is larger for pyrites of different mineral deposits, and meanwhile, the inhibitor has the defects of not obvious selectivity or having the inhibitor effect on main metals such as lead, zinc and the like. By combining the advantages and disadvantages of various inhibitors, the research and development of the non-toxic, easily soluble, appropriate-price and strong-adaptability composite inhibitor and the use method thereof have great significance.
Disclosure of Invention
The first purpose of the invention is to provide a pyrite complex inhibitor; the second purpose is to provide the application of the pyrite complex inhibitor.
The first purpose of the invention is realized by that the pyrite composite inhibitor is composed of two or more than two of sodium dimethyldithiocarbamate, sodium thiosulfate, ethylene diamine tetraacetic acid disodium and sodium sulfite.
The second purpose of the invention is realized by the application of the pyrite composite inhibitor in the separation of lead and sulfur from lead-sulfur bulk concentrate.
The invention has the following typical advantages: (1) the composite inhibitor and the use method thereof have obvious inhibition effect on pyrite, small inhibition effect on main metal and obvious separation effect. (2) The composite inhibitor is easy to dissolve in water, accurate in preparation, addition and flow control, and easy to stabilize the process and technical indexes in the production process. (3) The composite inhibitor has the advantages of small dosage, stable performance and no pollution, and can realize the full replacement of lime.
Drawings
FIG. 1 is a schematic diagram of a lead-sulfur separation scheme in example 1;
FIG. 2 is a schematic diagram of a lead-sulfur separation scheme in example 2;
FIG. 3 is a schematic diagram of a lead-sulfur separation scheme in example 3;
FIG. 4 is a schematic diagram of the lead-sulfur separation scheme of example 4;
FIG. 5 is a schematic diagram of a lead-sulfur separation scheme in example 5;
FIG. 6 is a schematic diagram of the lead-sulfur separation scheme of example 6.
Detailed Description
The present invention is further illustrated by the following examples and the accompanying drawings, but the present invention is not limited thereto in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
The pyrite composite inhibitor is composed of two or more of sodium dimethyldithiocarbamate, sodium thiosulfate, disodium ethylene diamine tetraacetate and sodium sulfite.
In the pyrite composite inhibitor, the weight ratio of sodium dimethyldithiocarbamate, sodium thiosulfate, disodium ethylene diamine tetraacetate and sodium sulfite is 1: (1.5-5): (0.5-2): (1.5-4.5).
The pyrite composite inhibitor consists of sodium dimethyldithiocarbamate and sodium thiosulfate in a weight ratio of 1: (1.5-5).
The pyrite composite inhibitor consists of disodium ethylene diamine tetraacetate and sodium sulfite, and the weight ratio is (0.5-2): (1.5-4.5).
The pyrite composite inhibitor consists of sodium dithiocarbamate, sodium thiosulfate and sodium sulfite, and the weight ratio is 1: (1.5-5): (1.5-4.5).
The pyrite composite inhibitor is characterized by comprising sodium thiosulfate and sodium sulfite in a weight ratio of (1.5-4.5): (1.5-5).
The application of the pyrite composite inhibitor is the application of the pyrite composite inhibitor in lead-sulfur separation of lead-sulfur bulk concentrate.
The process flow for separating lead and sulfur from lead-sulfur bulk concentrate comprises the following steps: and carrying out primary separation and roughing, 1-2 scavenging and 2-3 concentration on the lead-sulfur bulk concentrate to obtain lead concentrate.
The process flow for separating lead and sulfur bulk concentrate lead and sulfur comprises the following steps: firstly, adding water glass as an ore pulp dispersing agent, wherein the using amount of the water glass relative to raw ore is 0-1000 g/t; secondly, adding sodium hydroxide as a pH value regulator of the ore pulp, and regulating the pH value to be more than 12; and finally, adding the pyrite composite inhibitor, wherein the dosage of the pyrite composite inhibitor relative to the raw ore is 1000-1800 g/t.
And collecting agents are not added or added in the adding procedure of the agents according to the characteristics of the ore pulp.
The invention is further illustrated by the following specific examples:
example 1
The composite inhibitor 1 comprises sodium dimethyldithiocarbamate: sodium thiosulfate: sodium sulfite =1:5:4, the dosage of the medicament is 900g/t (relative to the raw ore, the same below), and other medicament systems are as follows: the dosage of the water glass is 400g/t, the dosage of the NaOH is 1300g/t (the pH value is more than 12), and the process flow is shown in figure 1.
Example 2
The compound inhibitor 2 comprises the following components: disodium ethylene diamine tetraacetate: sodium sulfite =4:2:4, the dosage of the medicament is 1200g/t, and other medicament systems are as follows: the dosage of the water glass is 800g/t, the dosage of the NaOH is 1300g/t (the pH value is more than 12), and the process flow is shown in figure 2.
Embodiment 3
The compound inhibitor 3 comprises the following components: disodium ethylene diamine tetraacetate: sodium sulfite: sodium dimethyldithiocarbamate =4:1:3:2, the dosage is 1500g/t, and other dosage systems are as follows: the dosage of the water glass is 0g/t, the dosage of the NaOH is 1000g/t (the pH value is more than 12), and the process flow is shown in figure 3.
Example 4
The compound inhibitor 4 comprises the following components: sodium sulfite =5.5:4.5, the dosage of the medicament is 1000g/t, and other medicament systems are as follows: the dosage of the water glass is 500g/t, the dosage of the NaOH is 1000g/t (the pH value is more than 12), and the process flow is shown in figure 4.
Example 5
The compound inhibitor 5 comprises the following components: sodium dimethyldithiocarbamate =5:1, the dosage of the medicament is 1600g/t, and other medicament systems are as follows: the dosage of the water glass is 600g/t, the dosage of the NaOH is 1200g/t (the pH value is more than 12), and the process flow is shown in figure 5.
Example 6
The composite inhibitor 6 comprises sodium sulfite: disodium ethylene diamine tetraacetate =4:2, the dosage of the medicament is 1400g/t, and other medicament systems are as follows: the dosage of the water glass is 1000g/t, the dosage of the NaOH is 1400g/t (the pH value is more than 12), and the process flow is shown in figure 6.
Figure 115627DEST_PATH_IMAGE002
The embodiments of the invention presented are only partial results and do not limit the claims set forth in this patent.

Claims (3)

1. The pyrite composite inhibitor is characterized by being used in lead-sulfur separation of lead-sulfur bulk concentrate; the weight ratio of sodium dimethyldithiocarbamate, sodium thiosulfate, disodium ethylene diamine tetraacetate and sodium sulfite in the pyrite composite inhibitor is 1 (1.5-5) to 0.5-2 to 1.5-4.5.
2. The application of the pyrite composite inhibitor according to claim 1, wherein the pyrite composite inhibitor is used for lead-sulfur separation of lead-sulfur bulk concentrate, and the process flow for separating lead-sulfur from lead-sulfur bulk concentrate is as follows: carrying out primary separation and roughing, 1-2 scavenging and 2-3 concentration on the lead-sulfur bulk concentrate to obtain lead concentrate; the medicament adding procedure is as follows: firstly, adding water glass as an ore pulp dispersing agent, wherein the using amount of the water glass relative to raw ore is 0-1000 g/t; secondly, adding sodium hydroxide as a pH value regulator of the ore pulp, and regulating the pH value to be more than 12; and finally, adding the pyrite composite inhibitor, wherein the dosage of the pyrite composite inhibitor relative to the raw ore is 1000-1800 g/t.
3. The use of the pyrite complex inhibitor according to claim 2, wherein the reagent addition procedure is further based on pulp characteristics, with no or no addition of a collector.
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CN110052333A (en) * 2019-04-11 2019-07-26 泉州工艺美术职业学院 A kind of fluorite flotation technique inhibitor and preparation method thereof
CN110216019B (en) * 2019-06-21 2020-12-04 北京矿冶科技集团有限公司 Photodegradable photosensitive molecular sulfide ore inhibitor and preparation method and application thereof
CN112439554A (en) * 2020-10-26 2021-03-05 云南驰宏锌锗股份有限公司 Comprehensive recovery process of silver-lead-zinc-sulfur bulk concentrate
CN112961975A (en) * 2021-01-21 2021-06-15 桂林理工大学 Preparation method for inhibiting photo-corrosion by modifying pyrite through DTC-TETA
CN114032029A (en) * 2021-10-28 2022-02-11 成都理工大学 Novel composite passivator for inhibiting oxidation of pyrite, and preparation method and application thereof

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CN105597912A (en) * 2016-02-02 2016-05-25 铜陵有色金属集团股份有限公司 Method for separating chalcopyrite from marcasite and pyrites in copper and sulphur ores

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CN105597912A (en) * 2016-02-02 2016-05-25 铜陵有色金属集团股份有限公司 Method for separating chalcopyrite from marcasite and pyrites in copper and sulphur ores

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