A method for separating jamesite and marmatite based on a new type of inhibitor of amino acids

Abstract

The application discloses a composite inhibitor-based multi-metal lead-zinc sulfide ore flotation separation method and belongs to the technical field of ore dressing. Specifically, the method comprises the following steps: (1) first, grinding and grading are performed on the minerals containing jamesonite and marmatite; (2) after one-time rough separation of the raw ore, secondary concentration operation is performed on the concentrate to obtain a lead-antimony concentrate; and (3) then, three-time scavenging operation is performed to obtain a zinc-containing tailing. The application proposes a new organic inhibitor DL-cysteine, and adopts a process of 'one rough separation, two concentration operations and three scavenging operations', so that efficient separation of lead and zinc can be realized, and environmental pollution can be effectively reduced. The application solves the problem that a large amount of cyanide needs to be used as an inhibitor for the separation of jamesonite and marmatite, thereby causing environmental pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore dressing, and particularly relates to a method for separating jamesonite and marmatite based on a new type of amino acid inhibitor. BACKGROUND

[0002] Jamesonite is a special lead-antimony sulfide mineral. The structure of the mineral is complex, and the mineral is often closely associated with marmatite, pyrite and pyrrhotite. In the process of flotation separation, the floatability of jamesonite is similar to that of marmatite, which causes difficulty in lead-zinc separation. The floatability difference between the copper ion activated marmatite and jamesonite is small, and a satisfactory recovery index cannot be obtained by using a cyanide-free inhibitor. Therefore, a large amount of cyanide needs to be added in the process of flotation separation, which causes great safety hazards to the environment and the life safety of employees. Therefore, it is of great significance to realize the cyanide-free separation of lead-zinc minerals. SUMMARY

[0003] The present application aims to provide a method for separating jamesonite and marmatite based on a new type of amino acid inhibitor, which uses a new type of organic inhibitor to replace the toxic cyanide and realizes the cyanide-free separation of lead and zinc. The process flow of 'one roughing, two cleaning and three scavenging' is adopted, and the new type of organic inhibitor is added in the cleaning stage, so that the efficient separation of lead and zinc minerals is realized.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a method for separating lead-zinc sulfide polymetallic ore by flotation based on a composite inhibitor, the mineral raw material is a concentrate after mixed flotation of sulfide ore, and the concentrate contains 1.06% of lead, 1.98% of antimony, 9.12% of zinc, 24.88% of iron, 23.28% of sulfur and 1.82% of arsenic. The phase analysis shows that the lead-zinc ore is mainly jamesonite and marmatite; in addition, there are a small amount of pyrite and arsenopyrite. The specific steps are as follows:

[0005] (1) Grinding operation: after the jamesonite and marmatite minerals are ground and classified, the grinding product with a particle size of-0.074 mm accounts for 84.65% to 95.46%;

[0006] (2) Preparation of reagent: the inhibitor DL-cysteine is configured into a solution with a mass concentration of 2%;

[0007] (3) Lead-zinc flotation separation operation: the process flow of 'one roughing, two cleaning and three scavenging' is adopted, the new type of inhibitor DL-cysteine is added as a zinc mineral inhibitor in the roughing, cleaning I and cleaning II stages, and CaO is used as a pH regulator. In the roughing stage, the collector ethylthiuron and the foaming agent methyl carbitol are added, and in the scavenging I and scavenging II stages, ethylthiuron is added as a lead mineral collector.

[0008] The lead grade of the lead, antimony and zinc containing crude ore in step (1) is 0.90% to 1.06%, and the zinc grade is 5.49% to 9.12%.

[0009] The dosage of the pH regulator CaO in step (3) is 2600g / t to 3000g / t.

[0010] The dosage of the inhibitor in step (3) is 200g / t to 1800g / t.

[0011] The dosage of the collector ethylthiuram sodium in step (3) is 80 to 800g / t.

[0012] The dosage of the foaming agent pinacolyl alcohol oil in step (3) is 12 to 15g / t.

[0013] The beneficial effects of the present application are:

[0014] The influence of the amino acid type organic inhibitor DL-cysteine on the separation of lead and zinc is proposed, the reagent is easy to dissolve in water, has wide sources, is green and efficient, the polar groups such as carboxyl and sulfydryl can be adsorbed on the mineral surface through coordination with metal ions (iron and zinc) on the mineral surface, form a hydrophilic complex with the surface of marmatite, increase the hydrophilicity of marmatite, realize the inhibition of marmatite, and thus achieve the purpose of separating lead and zinc. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The process flow chart is described in the present application. DETAILED DESCRIPTION

[0016] Example 1

[0017] This example is an example of the method for separating jamesonite and marmatite based on the new type inhibitor of amino acid type described in the present application, the mineral raw material is taken from the concentrate after mixed flotation of sulfide ore in a certain mine in Guangxi, which contains lead 1.06%, antimony 1.98%, zinc 9.12%, iron 24.88%, sulfur 23.28%, and arsenic 1.82%, and the phase analysis shows that the lead and zinc ore is mainly jamesonite and marmatite; in addition, there are a small amount of pyrite and arsenopyrite. The method comprises the following steps:

[0018] (1) Grinding operation: after the jamesonite and marmatite containing minerals are ground and classified, the grinding product-0.074mm particle size accounts for 84.65%;

[0019] (2) The new type organic inhibitor DL-cysteine is configured into a solution with a mass concentration of 2%;

[0020] (3) The lead and zinc separation flotation adopts secondary cleaning and three times of scavenging operation, and lead concentrate and zinc containing tailings are obtained respectively.

[0021] In the step (3), the pH value of the slurry is adjusted to 11 during roughing, and the organic inhibitor DL-cysteine is used in an amount of 200 g / t to 1800 g / t during roughing, cleaning I and cleaning II, and the collector ethylthiuram disulfide is added in an amount of 80 g / t to 800 g / t during roughing, cleaning I and cleaning II; during roughing, the amount of pine oil used is 12 g / t.

[0022] Example 2

[0023] This example is another example of the method for separating jamesite and marmatite based on the new inhibitor of amino acids according to the present application, which comprises the following steps:

[0024] The difference between this example and Example 1 is that the mineral grade and the content of lead and zinc minerals are different. The lead content is 0.95%, the zinc content is 7.03%, the antimony content is 1.14%, the sulfur content is 10.54%, and the arsenic content is 0.11%. The phase analysis shows that the lead and zinc minerals are mainly jamesite and marmatite; in addition, there are a small amount of pyrite and arsenopyrite, and the proportion of the -0.074 mm particle size is 89.45%. The amount of the organic inhibitor DL-cysteine is 300 g / t to 1600 g / t, the amount of the collector ethylthiuram disulfide is 150 g / t to 750 g / t, and the amount of the foaming agent pine oil used during roughing is 18 g / t.

[0025] Example 3

[0026] This example is another example of the method for separating jamesite and marmatite based on the new inhibitor of amino acids according to the present application, which comprises the following steps:

[0027] The difference between this example and Example 2 is that the mineral grade and the content of lead and zinc minerals are different. The lead content is 0.90%, the zinc content is 5.49%, the antimony content is 0.89%, the sulfur content is 18.24%, and the arsenic content is 0.12%. The phase analysis shows that the lead and zinc minerals are mainly jamesite and marmatite; in addition, there are a small amount of pyrite and arsenopyrite, and the proportion of the -0.074 mm particle size is 95.46%. The amount of the organic inhibitor DL-cysteine is 400 g / t to 1800 g / t, the amount of the collector ethylthiuram disulfide is 200 g / t to 800 g / t, and the amount of the foaming agent pine oil used during roughing is 15 g / t.

[0028] Comparative Example 1

[0029] In this comparative example, sodium cyanide is used as the lead and zinc flotation inhibitor, and the amount of cyanide used is 850 g / t, and the amounts of the other reagents used in the remaining steps are the same as those in Example 3. The grade of the feed ore is lead 0.60%, zinc 7.58%, antimony 1.14%, sulfur 10.54%, and arsenic 0.31%.

[0030] The new organic inhibitor is used to replace the toxic cyanide by using the medicine system of segmented addition, so that the green sorting of lead and zinc is realized, and the recovery rate of valuable metals is higher. Table 1 shows the test data comparison of the embodiment and the comparative example of the present application.

[0031] Table 1 test data comparison

[0032]

[0033] The above only describes the preferred examples of the present application, and those skilled in the art can still modify the technical solutions recorded in the foregoing examples, or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A novel inhibitor based on amino acids for the separation of jamesite and willemite, characterized by, The mineral raw material is a concentrate after mixed flotation of sulfide ore, wherein the content of lead is 1.06%, the content of antimony is 1.98%, the content of zinc is 9.12%, the content of iron is 24.88%, the content of sulfur is 23.28%, and the content of arsenic is 1.82%; the phase analysis shows that the lead-zinc ore is mainly composed of jamesite and marmatite; and a small amount of pyrite and arsenopyrite is also present; the specific steps are as follows: (1) grinding operation: after the grinding and classification of the minerals containing jamesite and marmatite, the grinding product with a particle size of-0.074 mm accounts for 84.65%-95.46%; (2) reagent preparation: the depressant DL-cysteine is configured into a solution with a mass concentration of 2%; (3) lead-zinc flotation separation operation: the process flow of "one roughing, two cleaning and three scavenging" is adopted; the depressant DL-cysteine is added as a zinc mineral depressant in roughing and cleaning I and cleaning II, respectively; CaO is used as a pH regulator; ethylthiuram sodium is used as a collector in roughing and scavenging I and II, respectively; and the amount of the depressant is 200 g / t-1800 g / t.

2. The novel inhibitor based on amino acids for separating jamesite and willemite according to claim 1, characterized by, The amount of the pH regulator CaO in step (3) is 2600 g / t-3000 g / t.

3. The novel inhibitor based on amino acids for separating jamesite and willemite according to claim 1, characterized by, The amount of the collector ethylthiuram sodium in step (3) is 80-800 g / t.

4. The novel inhibitor based on amino acids for separating jamesite and willemite according to claim 1, characterized by, The amount of the frother pinacolyl alcohol in step (3) is 12-15 g / t.

5. The novel inhibitor based on amino acids for separating jamesite and willemite according to claim 1, characterized by, The mineral raw material is a concentrate after mixed flotation of sulfide ore, wherein the content of lead is 0.95%, the content of zinc is 7.03%, the content of antimony is 1.14%, the content of sulfur is 10.54%, and the content of arsenic is 0.11%; the phase analysis shows that the lead-zinc ore is mainly composed of jamesite and marmatite; and a small amount of pyrite and arsenopyrite is also present.

6. The novel inhibitor based on amino acids for separating jamesite and willemite according to claim 1, characterized by, The mineral raw material is a concentrate after mixed flotation of sulfide ore, wherein the content of lead is 0.90%, the content of zinc is 5.49%, the content of antimony is 0.89%, the content of sulfur is 18.24%, and the content of arsenic is 0.12%; the phase analysis shows that the lead-zinc ore is mainly composed of jamesite and marmatite; and a small amount of pyrite and arsenopyrite is also present.

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