Use of butyl xanthate and ethyldithiuron containing flotation agent compositions in flotation of pyrite

Abstract

The application discloses application of a flotation agent composition containing butyl xanthate and ethyldithiuron in flotation of pyrite, the butyl xanthate and the ethyldithiuron have a synergistic effect, the flotation agent composition has good flotation collecting performance on the pyrite, and the pyrite can be efficiently recovered.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mineral processing, and particularly relates to application of a flotation agent composition containing butyl xanthate and ethyldithiuron in pyrite flotation BACKGROUND

[0002] Sulfur is an indispensable agricultural chemical raw material mineral, and has extremely important applications in industry. The position and role of sulfur resources in China's economic and social development are very important. For many years, pyrite has been the main source of sulfur resources in China. The main component of pyrite is pyrite, which has good natural floatability. Good indexes can be obtained by using conventional xanthate flotation reagents.

[0003] However, the use of conventional xanthate flotation reagents has the following problems: (1) large dosage and high cost. The floatability of pyrite depends on a weakly acidic pH environment, and the floatability decreases sharply when the pH is higher than 9-10. However, xanthate flotation reagents are easily decomposed in an acidic environment, resulting in a large dosage of flotation reagents and high cost. (2) Unsmooth flotation process. The use of a large amount of xanthate flotation reagents can easily cause the accumulation of flotation reagents in the flotation section, forming a large amount of foam and causing an unsmooth flotation process. (3) Large environmental protection treatment difficulty. The use of a large amount of xanthate flotation reagents increases the residual reagents in the ore pulp, increasing the cost and difficulty of environmental protection treatment.

[0004] Therefore, in order to solve the above problems, it is urgent to develop more economical and efficient, green and environmentally friendly pyrite flotation reagents. SUMMARY

[0005] The purpose of the present application is to provide the application of a flotation agent composition containing butyl xanthate and ethyldithiuron in pyrite flotation.

[0006] The present application is realized by the following technical solutions:

[0007] The application of a flotation agent composition containing butyl xanthate and ethyldithiuron in pyrite flotation, the flotation agent composition, based on 100% of the total mass percentage, comprises the following components: ethyldithiuron 10%-20%, and the rest is butyl xanthate. Preferably, the mass content of ethyldithiuron is 12%-17%, and the rest is butyl xanthate. Further, the mass content of ethyldithiuron is 16.7%, and the rest is butyl xanthate (i.e. the mass ratio of butyl xanthate to ethyldithiuron is 5:1).

[0008] The application of the flotation agent composition in pyrite flotation specifically includes the following steps:

[0009] A. Grinding the raw ore to a fineness of 200 mesh of 75%-95% of the total mass to obtain an ore slurry;

[0010] B. Flotation of sulfur concentrate: Sulfuric acid, flotation agent composition and pine oil are added to the slurry obtained in step A, and the first roughing is carried out to obtain rough concentrate I and middlings. The middlings are then subjected to a second roughing to obtain rough concentrate II and rough tailings.

[0011] Specifically, a four-stage cleaning process is performed on rougher concentrate I and rougher concentrate II to obtain sulfur concentrate;

[0012] Specifically, sulfuric acid, a flotation agent composition, and pine oil are added to the roughing tailings, and a two-stage scavenging process is performed to obtain the tailings.

[0013] In step B, for the first roughing, 1000-10000 g / t of concentrated sulfuric acid as an activator is added and stirred for 2-3 minutes; then 100-200 g / t of flotation agent composition is added and stirred for 3-5 minutes; finally, 10-50 g / t of pine oil stock solution is added and stirred for 2-3 minutes; for the second roughing, 80-150 g / t of flotation agent composition is added and stirred for 2-3 minutes.

[0014] The selection process is as follows: First selection: 0-400g / t of concentrated sulfuric acid, 30-100g / t of flotation reagent composition, stirring for 2-3 minutes; Second selection: no reagent added; Third selection: 0-100g / t of flotation reagent composition, stirring for 2-3 minutes; Fourth selection: no reagent added.

[0015] The scavenging process is as follows: First scavenging: 0-400g / t concentrated sulfuric acid, 3-50g / t flotation agent composition, 0-20g / t pine oil, stirred for 2-3 minutes; Second scavenging: no reagents added.

[0016] In this invention, "g / t" refers to the amount of reagent added relative to the raw ore. For example, if the amount of flotation reagent composition added is 200g / t, it means that 200g of flotation reagent composition needs to be added to process 1 ton of raw ore.

[0017] Preferably, the sulfur content in the raw ore is 15%-35% by mass.

[0018] Preferably, the concentrated sulfuric acid has a concentration of 98%.

[0019] Preferably, the flotation agent composition has a mass concentration of 3-7%.

[0020] The beneficial effects of this invention are as follows:

[0021] (1) Strong flotation effect and high metal recovery rate. Ethyl thiocyanate and butyl xanthate have a synergistic effect. The flotation agent composition has good flotation and collection performance for pyrite and can efficiently recover pyrite.

[0022] (2) Small dosage, low cost, smooth process, and more environmentally friendly. The pyrite flotation agent composition of the present invention uses less than traditional xanthate, which reduces costs. At the same time, it leaves less residue in the flotation stage, resulting in a smoother flotation process and greater environmental friendliness. Detailed implementation method:

[0023] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the embodiments described in this specification are merely for explaining the invention and are not intended to limit the invention. The parameters, proportions, etc., of the embodiments can be selected according to local conditions without substantially affecting the results.

[0024] Experiment 1: Comparative test of different mixing ratios of flotation reagents (same dosage)

[0025] A. Grind the raw ore (raw ore pulp concentration of about 40%, 200 mesh content of about 90.4%, grade of about 30.92%) until the ore with a fineness of 200 mesh accounts for 75% of the total mass to obtain the pulp.

[0026] B. The slurry obtained in step A is subjected to two roughing processes to obtain roughing concentrate I, roughing concentrate II, and roughing tailings. The corresponding yield, grade, and recovery rate are determined. In the first roughing process, 10,000 g / t of concentrated sulfuric acid is added to the slurry as an activator and stirred for 3 minutes, followed by 200 g / t of flotation agent composition and stirring for 3 minutes, and 29 g / t of pine oil concentrate and stirring for 2 minutes, yielding roughing concentrate I and middlings. In the second roughing process, 100 g / t of flotation agent composition is added to the middlings obtained in the first roughing process and stirred for 3 minutes, yielding roughing concentrate II and roughing tailings. The flotation agent compositions used in the roughing process are flotation agent compositions prepared in different mass ratios, with mixing ratios of butyl xanthate: ethyl thiocyanate = 4:1, 5:1, 6:1, 7:1, and 8:1, respectively. The total amount of flotation agent composition added remains constant at 346 g / t.

[0027] The concentrated sulfuric acid concentration is 98 wt%.

[0028] The results are shown in Table 1.

[0029] Table 1. Comparison of different mixing ratios of flotation agents (same dosage) (%)

[0030]

[0031] The experimental results are shown in Table 1. It can be seen that when butyl xanthate and ethyl thiocyanate are mixed in a ratio of 5:1 in the flotation agent composition, the grade of roughing tailings and the recovery rate of roughing concentrate I are relatively ideal.

[0032] Comparative Example 1:

[0033] Referring to Example 1, the difference is that the flotation agent composition (butyl xanthate: ethyl thiocyanate = 5:1) is replaced with butyl xanthate alone.

[0034] Comparative Example 2:

[0035] Referring to Example 1, the difference is that the flotation agent composition (butyl xanthate: ethyl thiocyanate = 5:1) is replaced with ethyl thiocyanate alone.

[0036] The results are shown in Table 2.

[0037] Table 2. Results of the comparative test of collectors (%)

[0038]

[0039] The experimental results are shown in Table 2. Considering the yield, grade, and recovery rate of the rough concentrate, it can be seen that the flotation effect of using ethyl thiocyanate and butyl xanthate alone is not ideal, especially the flotation effect of ethyl thiocyanate alone is very poor. However, the flotation agent composition of ethyl thiocyanate and butyl xanthate (5:1) is more effective than using either alone (highest recovery rate).

[0040] The experimental results showed that ethyl thiocyanate and butyl xanthate had a synergistic effect, and their reabsorption performance was enhanced compared to when they were used alone.

Claims

1. The application of a flotation agent composition containing butyl xanthate and ethyl thiocyanate in the flotation of pyrite, characterized in that, The flotation agent composition, based on a total mass percentage of 100%, comprises the following components: 16.7% ethyl thiocyanate and the remainder being butyl xanthate.

2. The application according to claim 1, characterized in that, Specifically, the following steps are included: A. Grind the raw ore until the ore with a fineness of 200 mesh accounts for 75%-95% of the total mass to obtain a slurry; B. Flotation of sulfur concentrate: Sulfuric acid, flotation agent composition and pine oil are added to the slurry obtained in step A, and the first roughing is carried out to obtain rough concentrate I and middlings. The middlings are then subjected to a second roughing to obtain rough concentrate II and rough tailings.

3. The application according to claim 2, characterized in that, In step B, for the first roughing, 1000-10000 g / t of concentrated sulfuric acid as an activator is added and stirred for 2-3 minutes; then 100-200 g / t of flotation agent composition is added and stirred for 3-5 minutes; finally, 10-50 g / t of pine oil stock solution is added and stirred for 2-3 minutes. For the second roughing, 80-150 g / t of flotation agent composition is added and stirred for 2-3 minutes.

4. The application according to claim 2, characterized in that, It also includes the following steps: A four-stage cleaning process was performed on rougher concentrate I and rougher concentrate II to obtain sulfur concentrate.

5. The application according to claim 4, characterized in that, The selection process is as follows: First selection: 0-400g / t of concentrated sulfuric acid, 30-100g / t of flotation reagent composition, stirring for 2-3 minutes; Second selection: no reagent added; Third selection: 0-100g / t of flotation reagent composition, stirring for 2-3 minutes; Fourth selection: no reagent added.

6. The application according to claim 2, characterized in that, It also includes the following steps: Sulfuric acid, a flotation agent composition, and pine oil were added to the roughing tailings, and the tailings were obtained by two scavenging processes.

7. The application according to claim 6, characterized in that, The scavenging process is as follows: First scavenging: 0-400g / t concentrated sulfuric acid, 3-50g / t flotation agent composition, 0-20g / t pine oil, stirred for 2-3 minutes; Second scavenging: no reagents added.

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