CN111841898A - Combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrate and application thereof - Google Patents
Combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrate and application thereof Download PDFInfo
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- CN111841898A CN111841898A CN202010693220.2A CN202010693220A CN111841898A CN 111841898 A CN111841898 A CN 111841898A CN 202010693220 A CN202010693220 A CN 202010693220A CN 111841898 A CN111841898 A CN 111841898A
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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
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention relates to a combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrate and application thereof, wherein the combined inhibitor comprises guar gum, dextrin, water glass and CMC; the mass ratio of the guar gum, the dextrin, the water glass and the CMC is (0.5-1): (0.5-1): 2-4): 0.5-1. The combined inhibitor provided by the invention solves the major technical defects of severe operating environment and environmental pollution of the traditional cyanide method and the phosphoinositide method by utilizing the coupling effect among the components, can obtain excellent ore dressing indexes without special treatment such as acidification or alkalization on ore pulp, improves the flotation separation effect of molybdenite and galena, can obviously improve the grade of molybdenum concentrate and the operation recovery rate, and greatly reduces the lead content in the molybdenum concentrate.
Description
Technical Field
The invention relates to the field of flotation, in particular to a combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrates and application thereof.
Background
Molybdenum is a rare metal, belongs to the national strategic reserve resource, has the advantages of high strength, high melting point, corrosion resistance, grinding resistance and the like, and is widely applied to the fields of national economy, national defense and scientific industry, mechanical manufacturing and the like.
The molybdenum-lead polymetallic sulphide ore has a complex structure, the minerals are symbiotic with each other, intercourse or wrapping, the embedded granularity is fine, and the natural floatability of the molybdenum-lead minerals is similar, so that the difficulty in separating the molybdenum and the lead from each other is high. Most of domestic molybdenum-based mine resources are associated with lead, and a 'molybdenum-lead and other floatable-molybdenum-lead separation' process flow is usually adopted when molybdenum-lead polymetallic ore is treated, and the key of the process flow lies in the separation effect of molybdenum-lead bulk concentrate. The traditional and effective molybdenum-lead separation method adopts cyanide or phosphorus nocks to inhibit lead and float molybdenum.
CN105597945A discloses a molybdenum-lead separation process for high-lead molybdenum ore, which comprises a first-stage classification of raw ore after a first-stage ore grinding process, and further comprises: firstly, feeding the overflow of the first stage of classification into a flotation machine or a flotation column for roughing to obtain roughing foam and roughing tailings, and adding a phosphonocks inhibitor in roughing; secondly, feeding the rougher tailings into a flotation machine for primary rougher scavenging; thirdly, feeding the first coarse scavenging tailings into a flotation machine for second coarse scavenging; fourthly, performing rough concentration on the rough concentration foam to obtain rough concentrate, sending the rough concentrate into a hydrocyclone for secondary classification, regrinding the underflow after the secondary classification, and returning the underflow to the hydrocyclone for secondary classification; and fifthly, selecting overflow after the two-stage classification. The method adds the phosphonocks to pre-inhibit galena in the roughing operation, can obtain obvious galena inhibition effect, has the technical indexes of rough concentrate molybdenum recovery rate, yield and the like equivalent to those of the original process, and does not cause adverse effect on the roughing operation.
CN110681495A discloses a thiourea compound flotation separation inhibitor and a flotation separation method thereof, the thiourea compound flotation separation inhibitor is obtained by addition reaction of hydrophilic compounds containing amino, hydroxyl or carboxyl and isothiocyanate compounds, can be used as an inhibitor of sulfide ores such as chalcopyrite, galena, pyrite, bismuthate ore, sphalerite and the like, is used for a flotation separation process of multi-metal sulfide ores such as copper lead, lead zinc, molybdenum lead, molybdenum sulfur, molybdenum bismuth, copper molybdenum, copper lead molybdenum and the like, and realizes flotation separation of complex multi-metal sulfide ores. The thiourea compound flotation separation inhibitor disclosed by the invention has the advantages of simple synthesis process, mild reaction conditions, low toxicity, safety in use, convenience in addition, easiness in obtaining raw materials and the like, is simple in operation process, can effectively replace the conventional sulfide ore inhibitor, and is favorable for improving the separation index.
In the two molybdenum-lead separation schemes, both cyanide and phosphonocks are chemical substances which are toxic and harmful to human bodies and can cause serious pollution to the environment, while the phosphonocks are easy to cause danger in the preparation process, accidental casualties occurring in the preparation process in mine production sometimes occur, the use of cyanide in the field of nonferrous metal sulfide ore dressing is definitely forbidden, and the high risk of the phosphonocks in the preparation process is strictly monitored by a monitoring department. In addition, the final separation effect of molybdenum and lead separation by adopting a cyanide method or a phosphonocks method is not ideal, so that the final molybdenum concentrate has high lead content, the quality of the molybdenum concentrate is poor, and the market and price are affected, which is also an important reason that domestic molybdenum fine powder cannot be sold to a high-end market.
Therefore, aiming at the complex and difficult-to-select fine molybdenum-lead sulfide ore, the molybdenum-lead separation inhibitor which is efficient, green and wide in applicability is developed, the nontoxic separation of molybdenum and lead is realized, the comprehensive utilization level of resources is favorably improved, the enterprise benefit is increased, and the ecological environment is protected.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a combined inhibitor for refractory fine-grain mixed molybdenum-lead concentrate and application thereof, the combined inhibitor provided by the invention solves the major technical defects of severe operating environment and environmental pollution of the traditional cyanide method and phosphoinosus method, and excellent mineral dressing indexes can be obtained without special treatments such as acidification or alkalization of ore pulp: the method has the advantages of simple process, strong adaptability to materials, safe and stable use, small medicament dosage, less pollution, cyclic use of waste water and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrate, which comprises guar gum, dextrin, water glass and CMC; the mass ratio of the guar gum, the dextrin, the water glass and the CMC is (0.5-1): (0.5-1): 2-4): 0.5-1.
The combined inhibitor provided by the invention solves the major technical defects of severe operating environment and environmental pollution of the traditional cyanide method and the phosphoinositide method by utilizing the coupling effect among the components, can obtain excellent ore dressing indexes without special treatment such as acidification or alkalization on ore pulp, improves the flotation separation effect of molybdenite and galena, can obviously improve the grade of molybdenum concentrate and the operation recovery rate, and greatly reduces the lead content in the molybdenum concentrate.
In the present invention, the mass ratio of guar gum, dextrin, water glass and CMC in the combination inhibitor is (0.5-1): (0.5-1): (2-4): (0.5-1), and may be, for example, 0.5:0.5:2:0.5, 1:0.5:2:0.5, 0.5:1:2:0.5, 0.5:0.5:3:0.5, 0.5:0.5:4:0.5, 0.5:0.5:2:1 or 1:1:4:1, but not limited to the above-mentioned values, and other values not listed in this range are also applicable.
As a preferable technical scheme of the invention, the mass ratio of the guar gum, the dextrin, the water glass and the CMC in the combined inhibitor is (0.7-0.8): (0.65-0.75): (2.5-3): 0.75-0.8.
In a second aspect, the invention provides a flotation separation method for molybdenum-lead bulk concentrate, which comprises the following steps:
(1) Adding activated carbon and the combined inhibitor in the first aspect into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum mineral and lead mineral, then adding a collecting agent, and performing rough concentration to obtain concentrate and tailings;
(2) concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate;
(3) and (3) carrying out scavenging on the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate.
As a preferable technical scheme of the invention, the mass percent of molybdenum in the molybdenum-lead bulk concentrate in the step (1) is 20-50%, and the mass percent of lead is 1.0-5.0%.
In the present invention, the mass percentage of molybdenum in the mo-pb bulk concentrate is 20 to 50%, and may be, for example, 20%, 25%, 30%, 35%, 40%, 45%, or 50%, but is not limited to the values listed above, and other values not listed in this range are also applicable.
In the present invention, the mass percentage of lead in the mo-pb bulk concentrate is 1.0 to 5.0%, and may be, for example, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, but is not limited to the above-mentioned values, and other values not listed in the range are also applicable.
In a preferred embodiment of the present invention, the slurry in step (1) has a mass concentration of 5 to 20%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 18%, or 20%, but not limited to the values listed above, and other values not listed in the range are also applicable.
As a preferred embodiment of the present invention, the amount of the activated carbon added in the step (1) is 500g/t, and may be, for example, 100g/t, 150g/t, 200g/t, 250g/t, 300g/t, 350g/t, 400g/t, 450g/t or 500g/t, but is not limited to the above-mentioned values, and other values not listed in the above range are also applicable.
As a preferred embodiment of the present invention, the amount of the combination inhibitor added in step (1) is 100-500g/t, for example, 100g/t, 150g/t, 200g/t, 250g/t, 300g/t, 350g/t, 400g/t, 450g/t or 500g/t, etc., but is not limited to the values listed, and other values not listed in this range are also applicable.
Preferably, the collector of step (1) comprises diesel and/or kerosene.
Preferably, the collector is added in an amount of 20-40g/t in step (1), for example, 20g/t, 22g/t, 24g/t, 26g/t, 28g/t, 30g/t, 32g/t, 34g/t, 36g/t, 38g/t or 40g/t, etc., but not limited to the recited values, and other values not recited in this range are equally applicable.
As a preferred embodiment of the present invention, the amount of the combination inhibitor added in the concentration in the step (2) is 100-300g/t, for example, 100g/t, 150g/t, 200g/t, 250g/t or 300g/t, etc., but is not limited to the above-mentioned values, and other values not listed in the range are also applicable.
Preferably, the amount of collector added in the concentration in step (2) is 5-15g/t, for example, 5g/t, 6g/t, 7g/t, 8g/t, 9g/t, 10g/t, 11g/t, 12g/t, 13g/t, 14g/t or 15g/t, etc., but not limited to the recited values, and other values not recited in this range are equally applicable.
Preferably, the collector comprises diesel and/or kerosene.
Preferably, said selection in step (2) is performed at least 3 times, for example, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times, 10 times, etc., but not limited to the recited values, and other values not recited in the range are also applicable.
Preferably, when the concentration in the step (2) is more than or equal to 3 times, the collecting agent and the combined inhibitor are only added in the first concentration, and the collecting agent is not added in the subsequent concentration.
Preferably, when the concentration is more than or equal to 4 times, no medicament is added after the fourth concentration.
As a preferred embodiment of the present invention, the amount of collector added in the sweep of step (3) is 3-10g/t, for example, 3g/t, 4g/t, 5g/t, 6g/t, 7g/t, 8g/t, 9g/t, or 10g/t, but not limited to the values recited, and other values not recited in this range are equally applicable.
Preferably, the collector comprises diesel and/or kerosene.
Preferably, the scavenging of step (3) is performed at least 1 time.
As a preferred technical solution of the present invention, the separation method comprises the steps of:
(1) adding activated carbon and the combined inhibitor of claim 1 or 2 into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum minerals and lead minerals, then adding a collecting agent, and performing rough concentration to obtain concentrate and tailings; the mass percent of molybdenum in the molybdenum-lead bulk concentrate is 20-50%, and the mass percent of lead is 1.0-5.0%; the mass concentration of the ore pulp is 5-20%; the adding amount of the active carbon is 100-500 g/t; the addition amount of the combined inhibitor is 100-500 g/t; the collector comprises diesel and/or kerosene; the addition amount of the collecting agent is 20-40 g/t;
(2) concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate; the addition amount of the combined inhibitor in the fine selection is 100-300 g/t; the addition amount of the collecting agent in the fine selection is 5-15 g/t; the collector comprises diesel and/or kerosene; the concentration is carried out at least 3 times; when the concentration is more than or equal to 3 times, the collecting agent and the combined inhibitor are only added during the first concentration, and the collecting agent is not added during the subsequent concentration; when the concentration is more than or equal to 4 times, no medicament is added after the fourth concentration;
(3) Scavenging the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate; the addition amount of the collecting agent in the sweeping process is 3-10 g/t; the collector comprises diesel and/or kerosene; the scavenging is performed at least 1 time.
In the invention, when the obtained concentrate is subjected to concentration for multiple times, the addition amount of the medicament is sequentially reduced along with the increase of the concentration times according to the flotation index, the collecting agent is not added after one-time concentration, and any medicament is not added after four-time concentration. The addition amount of the reagent can be properly reduced according to the ore dressing index, for example, the addition amount of the reagent is reduced to 20-90% of the addition amount of the reagent in the previous concentration operation.
The invention returns the middlings after each scavenging in sequence, namely the middlings in the next operation return to the previous operation.
The invention returns the middlings after each fine selection in sequence, namely the middlings in the next operation return to the previous operation.
Middling refers to the tailings of the concentration operation and the foam products of the scavenging operation of the flotation machine in the flotation process. Middlings are between the concentrate and the tailings and need further treatment. The processing method of the middlings is determined according to factors such as the content of intergrowth in the flotation middlings, the floatability of the required concentrates, the composition of the middlings, the foam content of the medicament in the middlings, the requirement on the quality of the concentrates and the like.
The molybdenum-lead bulk concentrate is a material containing molybdenum and lead obtained after molybdenum, lead and the like can float.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) the combined inhibitor provided by the invention solves the major technical defects of severe operating environment and environmental pollution of the traditional cyanide method and the phosphoinositide method by utilizing the coupling effect among the components, can obtain excellent ore dressing indexes without special treatment such as acidification or alkalization on ore pulp, improves the flotation separation effect of molybdenite and galena, can obviously improve the grade of molybdenum concentrate and the operation recovery rate, and greatly reduces the lead content in the molybdenum concentrate.
(2) By the method provided by the invention, the beneficiation result is as follows: the method has the advantages of simple process, strong adaptability to materials, safe and stable use, small medicament dosage, less pollution, cyclic use of waste water and the like.
Drawings
Fig. 1 is a schematic diagram of a flotation separation method of molybdenum-lead bulk concentrate provided in example 1 of the present invention.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The minerals in the embodiment are molybdenum grade of 26.35% and lead grade of 2.98% of certain molybdenum-lead bulk concentrate of inner Mongolia. The molybdenum mineral in the bulk concentrate is mainly molybdenite, and the lead mineral is galena; the granularity of the molybdenum and lead minerals is mainly distributed between 0.020 and 0.040 mm; the impurity minerals in the bulk concentrate are mainly pyrrhotite, and are zinc blende, and a small amount of arsenopyrite and pyrite are also contained.
The embodiment provides a flotation separation method of molybdenum-lead bulk concentrate by using a combined inhibitor, as shown in fig. 1, wherein the mass ratio of guar gum, dextrin, water glass and CMC in the combined inhibitor is 0.65:0.55:2.5:0.65, and the separation method comprises the following steps:
(1) adding activated carbon and the combined inhibitor into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum mineral and lead mineral, then adding a collecting agent, and performing roughing to obtain concentrate and tailings; the mass concentration of the ore pulp is 15%; the adding amount of the activated carbon is 300 g/t; the addition amount of the combined inhibitor is 300 g/t; the collector comprises diesel and/or kerosene; the addition amount of the collecting agent is 25 g/t;
(2) Concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate; the concentration is carried out for 7 times; the addition amount of the combined inhibitor in the first fine selection is 150 g/t; the addition amount of the collecting agent in the first fine selection is 10 g/t; the collecting agent is kerosene; the addition amount of the combined inhibitor in the second fine selection is 80 g/t; the addition amount of the combined inhibitor in the third fine selection is 50 g/t; the addition amount of the combined inhibitor in the fourth fine selection is 30 g/t; adding any medicament for the fifth, sixth and seventh picks;
(3) scavenging the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate; the scavenging is carried out for 2 times; the addition amount of the collecting agent in the first sweeping is 10 g/t; the addition amount of the collecting agent in the second sweeping is 5 g/t; the collecting agent is kerosene; .
Through detection, according to the mass percentage content, the molybdenum grade in the molybdenum concentrate obtained by the embodiment is 54.10%, the molybdenum operation recovery rate is 96.88%, and the lead content in the molybdenum concentrate is 0.013%; the lead grade in the obtained lead concentrate is 38.56 percent, and the lead recovery rate in the lead operation is 95.80 percent.
Example 2
The minerals in the embodiment are 31.45% of molybdenum grade and 1.88% of lead grade of certain molybdenum-lead bulk concentrate in Henan. The molybdenum mineral in the bulk concentrate is mainly molybdenite, and the lead mineral is galena; the granularity of the molybdenum and lead minerals is mainly distributed in 0.010-0.030 mm; the impurity minerals in the bulk concentrate are mainly sphalerite and secondly pyrite.
The embodiment provides a flotation separation method of molybdenum-lead bulk concentrate by using a combined inhibitor, wherein the mass ratio of guar gum, dextrin, water glass and CMC in the combined inhibitor is 0.55:0.75:3:0.65, and the separation method comprises the following steps:
(1) adding activated carbon and the combined inhibitor into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum mineral and lead mineral, then adding a collecting agent, and performing roughing to obtain concentrate and tailings; the mass concentration of the ore pulp is 10%; the adding amount of the activated carbon is 300 g/t; the addition amount of the combined inhibitor is 300 g/t; the collector comprises diesel and/or kerosene; the addition amount of the collecting agent is 30 g/t;
(2) concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate; the concentration is carried out for 6 times; the addition amount of the combined inhibitor in the first fine selection is 100 g/t; the addition amount of the collecting agent in the first fine selection is 15 g/t; the collecting agent is diesel oil; the addition amount of the combined inhibitor in the second fine selection is 60 g/t; the addition amount of the combined inhibitor in the third fine selection is 30 g/t; the addition amount of the combined inhibitor in the fourth fine selection is 60 g/t; no medicament is added in the fifth and sixth fine selection;
(3) Scavenging the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate; the addition amount of the collecting agent in the sweeping process is 10 g/t; the collector comprises diesel; the scavenging was performed 1 time.
Through detection, according to the mass percentage content, the molybdenum grade in the molybdenum concentrate obtained by the embodiment is 54.22%, the molybdenum operation recovery rate is 97.12%, and the lead content is 0.012%; the lead grade in the obtained lead concentrate is 36.11 percent, and the lead recovery rate in the lead operation is 94.55 percent.
Example 3
The bulk concentrate in the embodiment is a certain molybdenum-lead bulk concentrate in Shaanxi with a molybdenum grade of 27.95% and a lead grade of 1.18%. The molybdenum mineral in the bulk concentrate is mainly molybdenite, and the lead mineral is galena; the granularity of the molybdenum and lead minerals is mainly distributed between 0.030 mm and 0.040 mm; the impurity minerals in the bulk concentrate are mainly pyrite and sphalerite.
The embodiment provides a flotation separation method of molybdenum-lead bulk concentrate by using a combined inhibitor, wherein the mass ratio of guar gum, dextrin, water glass and CMC in the combined inhibitor is 0.75:0.55:3.5:0.65, and the separation method comprises the following steps:
(1) adding activated carbon and the combined inhibitor into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum mineral and lead mineral, then adding a collecting agent, and performing roughing to obtain concentrate and tailings; the mass concentration of the ore pulp is 18 percent; the adding amount of the activated carbon is 300 g/t; the addition amount of the combined inhibitor is 400 g/t; the collector comprises diesel and/or kerosene; the addition amount of the collecting agent is 30 g/t;
(2) Concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate; the concentration is carried out for 8 times; the addition amount of the combined inhibitor in the first fine selection is 130 g/t; the addition amount of the collecting agent in the first fine selection is 15 g/t; the addition amount of the combined inhibitor in the second fine selection is 100 g/t; the addition amount of the combined inhibitor in the third fine selection is 50 g/t; the addition amount of the combined inhibitor in the fourth fine selection is 30 g/t; no medicament is added in the fifth, sixth, seventh and eighth selection; the collecting agent is diesel oil;
(3) scavenging the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate; the addition amount of the collecting agent in the sweeping process is 10 g/t; the collecting agent is kerosene; the scavenging was performed 1 time.
Through detection, according to the mass percentage content, the molybdenum grade in the molybdenum concentrate obtained in the embodiment is 55.21%, the molybdenum recovery rate is 96.08%, and the lead content is 0.009%; the lead grade in the obtained lead concentrate is 35.51%, and the lead operation recovery rate is 93.96%.
Comparative example 1
The method is different from the example 1 only in that the combined inhibitor does not contain guar gum, the addition amount of the combined inhibitor is the same as that of the example 1, and the detection shows that the molybdenum grade in the obtained molybdenum concentrate is 50.16%, the molybdenum operation recovery rate is 93.26% and the lead content is 0.29% in terms of mass percentage content; the lead grade in the obtained lead concentrate is 28.56 percent, and the lead operation recovery rate is 73.23 percent.
Comparative example 2
The method is different from the example 1 only in that the combined inhibitor does not contain dextrin, the addition amount of the combined inhibitor is the same as that of the example 1, and the detection shows that the molybdenum grade in the obtained molybdenum concentrate is 52.13%, the molybdenum operation recovery rate is 91.19% and the lead content is 0.35% in terms of mass percentage content; the lead grade in the obtained lead concentrate is 29.55 percent, and the lead operation recovery rate is 75.41 percent.
Comparative example 3
The method is different from the example 1 only in that the combined inhibitor does not contain water glass, the addition amount of the combined inhibitor is the same as that of the example 1, and the detection shows that the molybdenum grade in the obtained molybdenum concentrate is 51.58%, the molybdenum operation recovery rate is 91.76% and the lead content is 0.34% in terms of mass percentage; the grade of lead in the obtained lead concentrate is 29.61 percent, and the operational recovery rate of lead is 73.95 percent.
Comparative example 4
The method is different from the example 1 only in that the combined inhibitor does not contain CMC, the addition amount of the combined inhibitor is the same as that of the example 1, and the detection shows that the molybdenum grade in the obtained molybdenum concentrate is 51.58%, the operational recovery rate of molybdenum is 91.25% and the lead content is 0.31% in percentage by mass; the lead grade in the obtained lead concentrate is 30.10 percent, and the lead operation recovery rate is 73.52 percent.
Comparative example 5
The method is different from the example 1 only in that the mass ratio of the guar gum, the dextrin, the water glass and the CMC in the combined inhibitor is 1.3:0.55:2.5:0.65, and through detection, according to the mass percentage content, the molybdenum grade in the obtained molybdenum concentrate is 53.18%, the molybdenum operation recovery rate is 96.13%, and the lead content is 0.25%; the lead grade in the obtained lead concentrate is 36.51%, and the lead recovery rate in the lead operation is 93.22%.
Comparative example 6
The method is different from the example 1 only in that the mass ratio of guar gum, dextrin, water glass and CMC in the combined inhibitor is 0.65:1.5:2.5:0.65, and through detection, according to the mass percentage content, the molybdenum grade in the obtained molybdenum concentrate is 52.16%, the molybdenum operation recovery rate is 96.06%, and the lead content is 0.31%; the lead grade in the obtained lead concentrate is 36.77 percent, and the lead operation recovery rate is 93.68 percent.
Comparative example 7
The method is different from the example 1 only in that the mass ratio of the guar gum, the dextrin, the water glass and the CMC in the combined inhibitor is 0.65:0.55:5:0.65, and through detection, according to the mass percentage content, the molybdenum grade in the obtained molybdenum concentrate is 51.96%, the molybdenum recovery rate is 95.98%, and the lead content is 0.35%; the lead grade in the obtained lead concentrate is 36.39%, and the lead operation recovery rate is 93.11%.
Comparative example 8
The method is different from the example 1 only in that the mass ratio of guar gum, dextrin, water glass and CMC in the combined inhibitor is 0.65:0.55:2.5:1.5, and through detection, according to the mass percentage content, the molybdenum grade in the obtained molybdenum concentrate is 53.69%, the molybdenum recovery rate is 94.21%, and the lead content is 0.29%; the lead grade in the obtained lead concentrate is 35.55 percent, and the lead operation recovery rate is 94.31 percent.
Comparative example 9
By the phosphonosh method (using P)2S5The beneficiation method of the molybdenum-lead bulk concentrate in the example 1 by using the solution prepared by mixing with NaOH according to the ratio of 1:1.3 as the molybdenum-lead separation inhibitor has the following molybdenum-lead separation effect: according to the mass percentage content, the molybdenum grade in the molybdenum concentrate is 49.28 percent, the molybdenum recovery rate is 85.36 percent, and the lead content is 0.46 percent; the lead grade in the obtained lead concentrate is 33.12 percent, and the lead operation recovery rate is 82.57 percent.
Comparative example 10
By the phosphonosh method (using P)2S5A beneficiation method in which a solution prepared in a ratio of 1:1.3 with NaOH is used as a molybdenum-lead separation inhibitor) for beneficiation of the molybdenum-lead bulk concentrate in example 2, the molybdenum-lead separation effect is as follows: according to the mass percentage content, the copper grade in the molybdenum concentrate is finally obtained to be 48.56 percent, the molybdenum recovery rate is 85.15 percent, and the lead content is 0.47 percent; the lead grade in the obtained lead concentrate is 32.12 percent, and the lead operation recovery rate is 79.28 percent.
Comparative example 11
By the phosphonosh method (using P)2S5A beneficiation method in which a solution prepared in a ratio of 1:1.3 with NaOH is used as a molybdenum-lead separation inhibitor) for beneficiation of the molybdenum-lead bulk concentrate in example 3, the molybdenum-lead separation effect is as follows: according to the mass percentage content, the copper grade in the molybdenum concentrate is 49.33%, the molybdenum recovery rate is 86.51%, and the lead content is 0.32%; the lead grade in the obtained lead concentrate is 32.47 percent, and the lead operation recovery rate is 84.92 percent.
According to the results of the embodiment and the comparative example, the combined inhibitor provided by the invention solves the major technical defects of severe operating environment and environmental pollution of the traditional cyanide method and the phosphoinositide method by utilizing the coupling effect among the components, can obtain excellent mineral separation indexes without special treatment such as acidification or alkalization on ore pulp, improves the flotation separation effect of molybdenite and galena, can obviously improve the grade and the operation recovery rate of molybdenum concentrate, and greatly reduces the lead content in the molybdenum concentrate.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A combined inhibitor for refractory fine-grained molybdenum-lead bulk concentrate, characterized in that the combined inhibitor comprises guar gum, dextrin, water glass and CMC; the mass ratio of the guar gum, the dextrin, the water glass and the CMC is (0.5-1): (0.5-1): 2-4): 0.5-1.
2. The combination inhibitor of claim 1, wherein the mass ratio of guar gum, dextrin, water glass and CMC in the combination inhibitor is (0.7-0.8): (0.65-0.75): (2.5-3): (0.75-0.8).
3. A flotation separation method of molybdenum-lead bulk concentrate is characterized by comprising the following steps:
(1) adding activated carbon and the combined inhibitor of claim 1 or 2 into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum minerals and lead minerals, then adding a collecting agent, and performing rough concentration to obtain concentrate and tailings;
(2) Concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate;
(3) and (3) carrying out scavenging on the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate.
4. The separation method of claim 3, wherein the molybdenum-lead bulk concentrate of step (1) has a molybdenum content of 20-50% by mass and a lead content of 1.0-5.0% by mass.
5. The separation process according to claim 3 or 4, characterized in that the pulp of step (1) has a mass concentration of 5-20%.
6. The separation method according to any one of claims 3 to 5, wherein the amount of the activated carbon added in the step (1) is 100-500 g/t.
7. The separation method according to any one of claims 3 to 6, wherein the amount of the combined inhibitor added in step (1) is 100-500 g/t;
preferably, the collector of step (1) comprises diesel and/or kerosene;
preferably, the addition amount of the collector in the step (1) is 20-40 g/t.
8. The separation process of any one of claims 3 to 7, wherein the concentration of step (2) is carried out at least 3 times;
preferably, the addition amount of the combined inhibitor in the first concentration is 100-300 g/t;
preferably, the addition amount of the collecting agent in the first fine selection is 5-15 g/t;
Preferably, the collector comprises diesel and/or kerosene;
preferably, when the concentration is more than or equal to 3 times, the collecting agent and the combined inhibitor are only added in the first concentration, and the collecting agent is not added in the subsequent concentration;
preferably, when the concentration is more than or equal to 4 times, no medicament is added after the fourth concentration.
9. The separation method according to any one of claims 3 to 8, wherein the amount of collector added in the sweeping process of step (3) is 3 to 10 g/t;
preferably, the collector comprises diesel and/or kerosene;
preferably, the scavenging of step (3) is performed at least 1 time.
10. The separation method according to any one of claims 3 to 9, wherein the separation method comprises the steps of:
(1) adding activated carbon and the combined inhibitor of claim 1 or 2 into ore pulp of molybdenum-lead bulk concentrate with the granularity of-0.043 mm of molybdenum minerals and lead minerals, then adding a collecting agent, and performing rough concentration to obtain concentrate and tailings; the mass percent of molybdenum in the molybdenum-lead bulk concentrate is 20-50%, and the mass percent of lead is 1.0-5.0%; the mass concentration of the ore pulp is 5-20%; the adding amount of the active carbon is 100-500 g/t; the addition amount of the combined inhibitor is 100-500 g/t; the collector comprises diesel and/or kerosene; the addition amount of the collecting agent is 20-40 g/t;
(2) Concentrating the concentrate obtained in the step (1) to obtain molybdenum concentrate; the addition amount of the combined inhibitor in the fine selection is 100-300 g/t; the addition amount of the collecting agent in the fine selection is 5-15 g/t; the collector comprises diesel and/or kerosene; the concentration is carried out at least 3 times; when the concentration is more than or equal to 3 times, the collecting agent and the combined inhibitor are only added during the first concentration, and the collecting agent is not added during the subsequent concentration; when the concentration is more than or equal to 4 times, no medicament is added after the fourth concentration;
(3) scavenging the tailings obtained in the step (1), wherein the scavenged tailings are lead concentrate; the addition amount of the collecting agent in the sweeping process is 3-10 g/t; the collector comprises diesel and/or kerosene; the scavenging is performed at least 1 time.
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