Gena composite collecting agent and preparation method and application thereof

Abstract

The invention relates to a galena composite collecting agent and a preparation method and application thereof, and the composite collecting agent is composed of, by weight, 15-80 parts of alcohol black powder, 20-95 parts of methyl isoamyl xanthate and 90-150 parts of propyl alcohol. The alcohol black powder, the methyl isoamyl xanthate and the propyl alcohol are proportioned according to specific components, the lead collecting efficiency and selectivity can be improved through the synergistic effect of all the components, the lead recycling rate is effectively increased, and meanwhile the mutual content of zinc in lead concentrate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and more specifically, to a galena composite collector and a preparation method and application thereof. Background Art

[0002] Metallic lead has stable chemical properties, good corrosion resistance, soft texture and easy processing. It is widely used in industry, mainly for the manufacture of lead-acid batteries, alloys, cable sheaths, anti-corrosion linings, radiation-proof covers, etc. Galena is the most important lead industrial mineral, and galena often coexists with sphalerite to form lead-zinc ore. Therefore, it is usually necessary to flotate lead-zinc ore to enrich galena to obtain lead concentrate, and the lead concentrate is further smelted to produce metallic lead. To achieve the purpose of enriching galena, the performance of galena collector is the key.

[0003] Based on the characteristics and occurrence forms of galena, how to achieve the effect of synergistic capture through simple and reasonable compound drugs and improve the flotation efficiency of minerals is of great significance for achieving efficient recovery of lead in complex and difficult-to-separate lead-zinc ores. Summary of the invention

[0004] Based on this, the present invention provides a galena composite collector, by which the separation effect of lean, fine and mixed lead-zinc ores can be improved, the lead selectivity is good, and the lead recovery rate is high.

[0005] In order to achieve the above object, the scheme of the present invention is as follows:

[0006] A galena composite collector consists of 15-80 parts of alcohol black medicine, 20-95 parts of methyl isopentyl xanthate and 90-150 parts of propanol, by weight.

[0007] In some embodiments, the mass ratio of the alcohol xanthate to the methyl isoamyl xanthate is 3:1-9.

[0008] In some embodiments, the galena composite collector is composed of 20-77 parts of alcohol black medicine, 25-80 parts of methyl isopentyl xanthate and 100-130 parts of propanol, by weight.

[0009] In some embodiments, the alcohol black medicine is di-sec-butyl dithiophosphate; more specifically, the alcohol black medicine is sodium di-sec-butyl dithiophosphate.

[0010] The present invention also provides a method for preparing the above-mentioned galena composite collector, which comprises the following steps:

[0011] The alcohol black medicine, methyl isoamyl xanthate and propanol are mixed according to a proportion, and stirred evenly at a temperature of 25-35° C. to obtain the galena composite collector.

[0012] The present invention also provides the use of the above-mentioned galena composite collector in mineral processing, and the use comprises the following steps:

[0013] The raw ore is ground to a fineness of -0.074 mm, with a particle size of 75%, to obtain a slurry, and then an inhibitor, a galena composite collector and a frother are added to scrape and foam to obtain a lead rough concentrate; the galena composite collector is then added to the ore slurry, and the lead concentrate and tailings are scraped and foamed to obtain the lead concentrate and tailings, and the lead rough concentrate and the lead concentrate are combined to obtain a final lead concentrate.

[0014] In some embodiments, the inhibitor is sodium sulfite, and the addition amount is 250-300g / t; the foaming agent is 2 # Oil, the addition amount is 25-40g / t; the first collector addition amount is 70-100g / t, and the second collector addition amount is 30-50g / t.

[0015] In some embodiments, the Pb grade in the raw ore is less than 1.0%, and the Zn grade is 3.0-5.0%; preferably, the Pb grade is 0.3-1.0%.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention uses alcohol black medicine, methyl isoamyl xanthate and propanol as raw material components of the galena composite collector, improves the collection capacity and selectivity of galena through the synergistic effect of the components, and has a good sorting effect.

[0018] The galena composite collector of the present invention can float lead in a wide pH range (7-13), has strong adaptability to on-site flotation environment, can form small and stable bubbles during the flotation process, and is beneficial to improving the recovery rate of lead.

[0019] The galena composite collector of the present invention can enhance the selectivity and capture of closely interwoven lead minerals under the premise of using a similar or less amount. Compared with the traditional galena collector, the lead grade is increased by 0.15%-2.00%, the recovery rate is increased by 1.25%-7.69%, and the mutual inclusion of zinc in the lead concentrate can be reduced.

[0020] The galena composite collector of the invention has readily available raw materials, is simple and reliable to prepare, has stable properties, and is convenient to operate on site. DETAILED DESCRIPTION

[0021] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] Example 1

[0024] A galena composite collector, which is composed of 75 parts of sodium di-sec-butyl dithiophosphate, 25 parts of methyl isoamyl xanthate and 110 parts of propanol, by weight.

[0025] Its preparation comprises the following steps:

[0026] Sodium di-sec-butyl dithiophosphate, methyl isoamyl xanthate and propanol were weighed according to the weight parts, mixed, and stirred at a temperature of 30° C. for 4.5 hours to make the raw materials uniformly mixed, thereby obtaining a galena composite collector.

[0027] Example 2

[0028] A galena composite collector, which is composed of 50 parts of sodium di-sec-butyl dithiophosphate, 50 parts of methyl isopentyl xanthate and 110 parts of propanol, by weight.

[0029] The preparation method is the same as that of Example 1.

[0030] Example 3

[0031] A galena composite collector, which is composed of 26 parts of sodium di-sec-butyl dithiophosphate, 75 parts of methyl isoamyl xanthate and 110 parts of propanol, by weight.

[0032] The preparation method is the same as that of Example 1.

[0033] Application Example 1

[0034] The galena composite collector obtained in Examples 1-3 was applied to the flotation of lead-zinc ore, and the specific beneficiation process was as follows:

[0035] After the raw ore is ground to a fineness of -0.074 mm, 75% of the particle size is accounted for, 300 g / t of sodium sulfite inhibitor, 80 g / t of galena composite collector prepared in Example 1 and 20 g / t of frother are added. # Oil 25-40g / t, scrape the foam to obtain a lead rough concentrate, then add 40g / t of the galena composite collector prepared in the embodiment to the slurry, scrape the foam to obtain lead concentrate and tailings, and combine the lead rough concentrate and lead concentrate to obtain the final lead concentrate.

[0036] Application Example 2

[0037] The flotation process of this application example is the same as that of application example 1, and the collector is the galena composite collector prepared in Example 2. The only difference is that the inhibitor in this application example is lime, and its dosage is 1.5-2kg / t. The specific process flow is as follows:

[0038] After the raw ore is ground to a fineness of -0.074mm, 75% of the particle size is added with 1.5-2kg / t lime, 80g / t collector and 2 # Oil 25-40g / t, scrape the foam to get the lead rough concentrate; then add 40g / t of collector to the slurry, scrape the foam to get the lead concentrate and tailings, combine the lead rough concentrate and lead concentrate to get the final lead concentrate.

[0039] Comparative Example 1

[0040] The collector in this comparative example is a conventional galena combined collector of butyl xanthate + ethyl thiocyanate, and the flotation process is the same as the mineral processing process used in Application Example 2, the only difference being that the collector and the ratio in this comparative example are butyl xanthate + ethyl thiocyanate (1:1), and the total amount is 140g / t. The specific process is as follows:

[0041] After the raw ore is ground to a fineness of -0.074 mm, 75% of the particle size is added, 1.5-2 kg / t of lime, 100 g / t of the collector described in Comparative Example 1, and 2 # Oil 25-40g / t, scrape the foam to obtain a lead rough concentrate; then add 40g / t of the collector described in Comparative Example 1 to the slurry, scrape the foam to obtain a lead concentrate and tailings, and combine the lead rough concentrate and the lead concentrate to obtain a final lead concentrate.

[0042] Comparative Example 2

[0043] The collector in this comparative example is a conventional galena combined collector of butyl ammonium black medicine + ethyl xanthate, and the flotation process is consistent with the flotation process of Application Example 1, the only difference is that the collector and the ratio in this comparative example are butyl ammonium black medicine + ethyl xanthate (2:1), and the total amount is 140g / t. The specific process is as follows:

[0044] After the raw ore is ground to a fineness of -0.074 mm, 75% of the particle size is added, 300 g / t of sodium sulfite, 100 g / t of the collector described in Comparative Example 2, and 200 g / t of the frother are added. # Oil 25-40g / t, scrape the foam to obtain a lead rough concentrate, then add 40g / t of the collector described in Comparative Example 2 to the slurry, scrape the foam to obtain lead concentrate and tailings, and combine the lead rough concentrate and lead concentrate to obtain the final lead concentrate.

[0045] The results of flotation tests using the collectors of the examples and the collectors of the comparative examples are shown in Table 1.

[0046] Table 1 The collection effect of lead in Examples 1-3 and Comparative Examples 1-2

[0047]

[0048] The data in Table 1 show that the conventional galena composite collector has poor selectivity and it is difficult to balance collectability and selectivity. The galena composite collector provided by the present invention can improve the lead grade and recovery rate of lead concentrate under natural pH and high alkaline conditions, and can reduce the mutual inclusion of zinc in the lead concentrate, and shows good selectivity and collectability for lead at a lower dosage.

[0049] In summary, the selection index of the lead concentrate product can be further improved by adjusting the weight ratio of the raw materials of the collector of the present invention.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A galena composite collector, characterized in that: Calculated by weight, it consists of 15-80 parts of alcohol black medicine, 20-95 parts of methyl isopentyl xanthate and 90-150 parts of propanol.

2. The galena composite collector according to claim 1, characterized in that The mass ratio of the alcohol black medicine to the methyl isoamyl xanthate is 3:1-9.

3. The galena composite collector according to claim 1, characterized in that By weight, it consists of 20-77 parts of alcohol black medicine, 25-80 parts of methyl isopentyl xanthate and 100-130 parts of propanol.

4. The galena composite collector according to any one of claims 1 to 3, characterized in that The alcohol black medicine is di-sec-butyl dithiophosphate.

5. The galena composite collector according to claim 4, characterized in that The alcohol black medicine is sodium di-sec-butyl dithiophosphate.

6. The method for preparing the galena composite collector according to any one of claims 1 to 5, comprising the following steps: The alcohol black medicine, methyl isoamyl xanthate and propanol are mixed according to a proportion, and stirred evenly at a temperature of 25-35° C. to obtain the galena composite collector.

7. Use of the galena composite collector according to any one of claims 1 to 5 in mineral processing, characterized in that: The following steps are involved: The raw ore is ground to a fineness of -0.074 mm, with a particle size of 75%, to obtain a slurry, and then an inhibitor, a galena composite collector and a frother are added to scrape and foam to obtain a lead rough concentrate; the galena composite collector is then added to the ore slurry, and the lead concentrate and tailings are scraped and foamed to obtain the lead concentrate and tailings, and the lead rough concentrate and the lead concentrate are combined to obtain a final lead concentrate.

8. The use according to claim 7, characterized in that: The inhibitor is sodium sulfite, the addition amount is 250-300g / t; the foaming agent is 2 # Oil, the addition amount is 25-40g / t; the first collector addition amount is 70-100g / t, and the second collector addition amount is 30-50g / t.

9. The use according to claim 7, characterized in that: The Pb grade in the raw ore is less than 1.0%, and the Zn grade is 3.0-5.0%.

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