Flotation reagent for high-sulfur bauxite associated with cobalt minerals and application and comprehensive utilization method of flotation reagent

Abstract

The invention relates to the technical field of beneficiation, and provides a flotation reagent for cobalt mineral associated high-sulfur bauxite, which comprises a combined collecting agent, an inhibitor, an activating agent and a brittle foaming agent, wherein the combined collecting agent comprises potassium isoamyl xanthate and sodium dibutyl dithiophosphate; the inhibitor includes phytic acid. The invention further provides application of the flotation reagent in flotation of the high-sulfur bauxite associated with the cobalt minerals and a comprehensive utilization method of the high-sulfur bauxite associated with the cobalt minerals. According to the method, the sulfide ore in the high-sulfur bauxite associated with the cobalt minerals is removed through an innovative ore dressing means, the quality of the obtained bauxite can be improved, sulfur and cobalt resources in the high-sulfur bauxite associated with the cobalt minerals can be fully recycled, and therefore the comprehensive utilization rate of the high-sulfur bauxite resources associated with the cobalt minerals can be increased; and the method conforms to the sustainable development concept.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ore dressing, for example, to a flotation reagent for high-sulfur bauxite associated with cobalt minerals, its application, and a comprehensive utilization method. Background Art

[0002] Bauxite, as the main raw material for producing aluminum, plays a crucial role in modern industry. The high-quality bauxite resources in China are limited, and most are low-quality ores with insufficient reserves, so the external dependence is extremely high. China has rich reserves of high-sulfur bauxite, with the proven resource volume of about 1 billion tons, mainly concentrated in Guizhou, Henan and other places. Among them, about 57% is high-grade bauxite with an aluminum-silicon ratio greater than 7. Reasonably developing and utilizing this part of resources is of great significance for improving the supply situation of bauxite resources in China.

[0003] However, when using the Bayer process for alumina production, sulfur in high-sulfur bauxite will cause a series of negative effects. For example, when the content of sulfide minerals in bauxite is relatively high, sulfur exists in the production process in the form of sulfite ions, etc., which has an adverse impact on key processes such as digestion, sedimentation, and evaporation. Therefore, the desulfurization treatment of high-sulfur bauxite has become a key technical requirement in this field. In the past, the utilization of high-sulfur bauxite mainly focused on the removal of sulfide minerals and the extraction of alumina, often neglecting the comprehensive utilization of associated sulfide mineral resources.

[0004] In recent years, cobalt enrichment has also been found in high-sulfur bauxite in Maochang, Yunfeng and other places in Guizhou. It mainly occurs in pyrite in the form of isomorphism. Cobalt is a strategic key metal and is widely used in strategic emerging industries such as new energy batteries and aerospace, as well as national defense and military industries. With the increasingly severe problem of resource shortage and the continuous improvement of environmental protection requirements, it is urgent to develop an efficient, environmentally friendly and economically feasible comprehensive utilization method for high-sulfur bauxite associated with cobalt resources.

[0005] To sum up, there is an urgent need for a comprehensive utilization method for high-sulfur bauxite associated with cobalt resources, so that it can fully recover sulfur and cobalt resources, improve resource utilization rate, and meet the needs of sustainable development of modern mining. Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a flotation reagent for high-sulfur bauxite associated with cobalt minerals, its application, and a comprehensive utilization method, so as to at least achieve the effect of not only improving the quality of the obtained bauxite, but also fully recovering the sulfur and cobalt resources in the high-sulfur bauxite associated with cobalt minerals, thereby contributing to improving the comprehensive utilization rate of the high-sulfur bauxite resources associated with cobalt minerals.

[0007] The purpose of the present disclosure is achieved through the following technical solutions:

[0008] On the one hand, a flotation reagent for high-sulfur bauxite associated with cobalt minerals is provided. The flotation reagent includes a combined collector, an inhibitor, an activator, and a brittle foaming agent; wherein, the combined collector includes isopentyl potassium xanthate and sodium dibutyldithiophosphate; the inhibitor includes inositol hexaphosphate.

[0009] It should be noted that the flotation reagent provided by the present disclosure uses the combined collector to replace the traditional single sulfide ore collector, which is beneficial to the recovery of fine-grained sulfide ore and can improve the removal rate of sulfide ore in the high-sulfur bauxite; among them, the isopentyl potassium xanthate has strong collecting ability and can quickly act with the surface of sulfide ore to form a stable adsorption layer; the sodium dibutyldithiophosphate has good selectivity for sulfide ore and can accurately identify and collect the target sulfide ore. Therefore, the isopentyl potassium xanthate and the sodium dibutyldithiophosphate can cooperate with each other to play a synergistic effect. During the flotation process, the combined collector can specifically adsorb on the active sites on the surface of fine-grained sulfide ore, change the charge distribution and hydrophobicity on the surface of sulfide ore, cause the interaction force between sulfide ore particles to change, and promote the re-assembly of the foam layer in the flotation cell. Different from the foam layer under the action of the traditional single sulfide ore collector, the re-assembled foam layer under the action of the combined collector has a more stable and reasonable structure, which can effectively improve the problem of slime entrainment.

[0010] At the same time, the flotation reagent provided by the present disclosure uses inositol hexaphosphate as the inhibitor, which can effectively improve the quality of the obtained sulfur-cobalt mixed concentrate; among them, inositol hexaphosphate can selectively adhere to the surface of low-sulfur cobalt minerals, change their surface charge and wettability, enhance hydrophilicity, thereby effectively inhibiting their floatability, and inositol hexaphosphate has weak inhibition on target metal minerals, so it can ensure better enrichment of target minerals. In addition, inositol hexaphosphate can be naturally degraded, which conforms to the concept of green mineral processing and can reduce the ecological pressure caused by resource development.

[0011] In some embodiments, the activator includes one of citric acid, tartaric acid, and nitrilotriacetic acid.

[0012] In the above-mentioned some embodiments, the flotation reagent uses citric acid, tartaric acid, or nitrilotriacetic acid as the activator. Citric acid, tartaric acid, and nitrilotriacetic acid are all small-molecule acids, and their molecular structures contain -COOH or -OH, which can form stable complexes with metal ions (Fe 3+ )), reducing the local positive charge on the surface of sulfide ore, causing the surface potential to shift in the negative direction, and weakening the combination of the collector and Fe 3+The interaction between them makes the combined collector easier to adsorb on the surface of sulfide minerals, thereby improving their floatability and playing an activating role. In addition, under certain conditions, the above-mentioned small molecule acid also has a certain reducing property and can participate in the redox reaction on the surface of sulfide minerals. It can react with the oxide layer on the surface of sulfide minerals, reduce the high-valent metal oxide to a low-valent state, remove the surface oxide layer, expose the fresh mineral surface, thereby improving the activity of the mineral surface and facilitating the adsorption of the combined collector.

[0013] In some embodiments, the brittle foaming agent includes one of methyl carbitol and propylene glycol ethyl ether.

[0014] In some of the above embodiments, when the flotation reagent uses the methyl carbitol or the propylene glycol ethyl ether as the brittle foaming agent, it can generate non-viscous mineralized foam, which is beneficial to subsequent separation.

[0015] In some embodiments, the mass ratio of the isopentyl potassium xanthate to the sodium dibutyl dithiophosphate is 1-3:1.

[0016] It should be noted that the isopentyl potassium xanthate has a strong collecting ability and can quickly act on the surface of sulfide ore to form a stable adsorption layer. The sodium dibutyl dithiophosphate has good selectivity for sulfide ore and can reduce the adhesion of slime on the bubbles through electrostatic repulsion. The two can play a synergistic effect, and this synergistic effect is more advantageous than using the isopentyl potassium xanthate alone or the sodium dibutyl dithiophosphate alone.

[0017] On this basis, in some of the above embodiments, by limiting the mass ratio of the isopentyl potassium xanthate to the sodium dibutyl dithiophosphate, not only can the collecting efficiency of sulfide ore in the flotation process be further improved, but also the problem of slime entrainment can be improved, the stability of the foam layer can be enhanced, and thus the flotation effect can be further improved.

[0018] In some embodiments, in the high-sulfur bauxite, the content of S is 5%-20%, and the content of Co is 0.005%-0.02%.

[0019] On the other hand, there is provided an application of a flotation reagent as described in any one of the above embodiments in the flotation of high-sulfur bauxite associated with cobalt minerals.

[0020] In some embodiments, in the high-sulfur bauxite, the content of S is 5%-20%, and the content of Co is 0.005%-0.02%.

[0021] In another aspect, a comprehensive utilization method for high-sulfur bauxite associated with cobalt minerals is provided. The comprehensive utilization method uses the flotation reagents as described in any one of the above embodiments. The comprehensive utilization method includes: grinding the high-sulfur bauxite to obtain a sample for flotation; adding the activator, the combined collector, and the brittle foaming agent to the sample for flotation, adjusting the pulp, and then performing rough selection for sulfur-cobalt enrichment to obtain a rough concentrate and a rougher tailing; adding the inhibitor to the rough concentrate for cleaning to obtain a sulfur-cobalt mixed concentrate; and adding the combined collector to the rougher tailing for scavenging to obtain upgraded bauxite.

[0022] It should be noted that the comprehensive utilization method provided by the present disclosure innovatively proposes to comprehensively recover the cobalt resources in the high-sulfur bauxite associated with cobalt minerals. By adopting a sulfur-cobalt enrichment process and cooperating with the addition of the flotation reagents, sulfur-cobalt enrichment is preferably achieved, and the sulfur-cobalt mixed concentrate and the upgraded bauxite are obtained. It is an ideal flotation method for comprehensively recovering the high-sulfur bauxite associated with cobalt minerals.

[0023] Among them, the principle of action of the comprehensive utilization method provided by the present disclosure includes:

[0024] 1) During the rough selection for sulfur-cobalt enrichment, considering that the floatability of some cobalt-containing sulfide minerals is poor and it is difficult to fully react with the collector for effective flotation, the activator is first added to activate the target minerals in the flotation pulp, thereby improving the separation effect; then the combined collector is added, and the synergistic effect between the isoamyl potassium xanthate and the sodium dibutyldithiophosphate is utilized to enhance the selective collection ability for sulfide minerals in the high-sulfur bauxite, thereby achieving efficient sulfur-cobalt enrichment; then the brittle foaming agent is added to generate non-viscous mineralized foam, which is beneficial to the subsequent cleaning.

[0025] 2) During the cleaning, in order to further improve the separability, the inhibitor is added to effectively inhibit low-sulfur cobalt minerals, so that the target metal minerals are better enriched, and a sulfur-cobalt mixed concentrate with better quality is obtained, providing raw materials for metallurgical extraction of cobalt.

[0026] In addition, it should be noted that one of the purposes to be achieved by the comprehensive utilization method provided by the present disclosure is the enrichment of sulfur-cobalt resources, and the manifestations of the enrichment effect in the beneficiation indexes include, but are not limited to: the improvement of the grades and recovery rates of sulfur (S) and cobalt (Co) in the sulfur-cobalt mixed concentrate.

[0027] In some embodiments, a cleaning middling is also obtained after the cleaning. The comprehensive utilization method further includes: returning the cleaning middling to the rough selection for sulfur-cobalt enrichment.

[0028] In some examples, middlings are also obtained during the scavenging. The comprehensive utilization method further includes: centrally returning the scavenged middlings and the concentrated middlings to the sulfur-cobalt enrichment roughing

[0029] It should be understood that the treatment method of the middlings has an important impact on the final recovery effect.

[0030] It should be noted that in some embodiments of the present disclosure, the method of centrally returning the middlings is adopted. The method of centrally returning the middlings means that the middlings generated from the cleaning (for example, 3 times of cleaning) and the scavenging (for example, 1 time of scavenging) are merged and then uniformly returned to the sulfur-cobalt enrichment roughing for reprocessing.

[0031] It is worth noting that for the comprehensive utilization method provided by the present disclosure, the flotability of the middlings generated from the cleaning and the scavenging is good. When the quality requirements for the obtained concentrate are relatively high, it is advisable to adopt the method of centrally returning the middlings, which can improve the quality of the obtained concentrate.

[0032] In some embodiments, in the sulfur-cobalt enrichment roughing, the dosage of the activator is 180 - 240 g / t of raw ore, the dosage of the combined collector is 120 - 160 g / t of raw ore, and the dosage of the brittle foaming agent is 12 - 20 g / t of raw ore.

[0033] In some examples, the number of times of the sulfur-cobalt enrichment roughing is 1 time.

[0034] In some embodiments, in the cleaning, the dosage of the inhibitor is 40 - 60 g / t of raw ore.

[0035] In some examples, in the cleaning, the dosage of the inhibitor is 50 g / t of raw ore.

[0036] In some examples, the number of times of the cleaning is 3 times.

[0037] Exemplarily, the cleaning includes the first cleaning, the second cleaning, and the third cleaning; the rough concentrate undergoes the first cleaning to obtain the first middlings and the first concentrate; the first concentrate undergoes the second cleaning to obtain the second middlings and the second concentrate; the second concentrate undergoes the third cleaning to obtain the third middlings and the sulfur-cobalt mixed concentrate; wherein, the first cleaning uses the inhibitor, and the second cleaning and the third cleaning are both blank cleanings; the first middlings, the second middlings, and the third middlings are merged to obtain the concentrated middlings.

[0038] In some embodiments, in the scavenging, the dosage of the combined collector is 30 - 40 g / t of raw ore.

[0039] In some examples, the number of times of the scavenging is 1 time.

[0040] In some embodiments, the mass percentage of minerals with a particle size of -0.074 mm in the floated sample is 75% to 83%.

[0041] In some examples, the mass percentage of minerals with a particle size of -0.074 mm in the floated sample is 80%.

[0042] It should be noted that "the mass percentage of minerals with a particle size of -0.074 mm in the floated sample is 75% to 83%" can also be understood as "the grinding fineness of the grinding is that the content of -0.074 mm is 75% to 83%", and the two have the same meaning.

[0043] Similarly, it can be known that "the mass percentage of minerals with a particle size of -0.074 mm in the floated sample is 80%" can also be understood as "the grinding fineness of the grinding is that the content of -0.074 mm is 80%", and the two have the same meaning.

[0044] In some embodiments, in the high-sulfur bauxite, the content of S is 5% to 20%, and the content of Co is 0.005% to 0.02%.

[0045] In summary, it can be seen that the present disclosure aims at the complex problem of the comprehensive utilization of high-sulfur bauxite associated with cobalt minerals, and through innovative process design and reagent system research and development, demonstrates multi-dimensional beneficial effects.

[0046] The beneficial effects of the present disclosure are as follows:

[0047] 1. A flotation reagent for high-sulfur bauxite associated with cobalt minerals, its application, and a comprehensive utilization method provided by the present disclosure. Compared with the traditional utilization process of high-sulfur bauxite, by innovatively removing sulfide minerals in high-sulfur bauxite associated with cobalt minerals through beneficiation means, not only can the quality of the obtained bauxite be improved, but also the associated sulfur and cobalt resources in the high-sulfur bauxite can be fully recovered; from the perspective of beneficiation specialty, this tailing-free treatment method effectively avoids the potential harm to the environment caused by tailing discharge, fully conforms to the current concept of green environmental protection, and provides a practical solution for the sustainable development of the mining industry.

[0048] 2. A flotation reagent for high-sulfur bauxite associated with cobalt minerals, its application, and a comprehensive utilization method provided by the present disclosure help to improve the comprehensive utilization rate of high-sulfur bauxite resources associated with cobalt minerals, which conforms to the concept of sustainable development.

[0049] 3. A flotation reagent for high-sulfur bauxite associated with cobalt minerals, its application, and a comprehensive utilization method provided by the present disclosure are of great significance for realizing scientific and technological reserve increase of high-sulfur bauxite resources associated with cobalt minerals. Description of the Drawings

[0050] To more clearly illustrate the technical solutions in the present disclosure, the accompanying drawings required for some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams and do not limit the actual processes of the methods involved in the embodiments of the present disclosure.

[0051] Figure 1 It is a principle flow chart of a comprehensive utilization method for high-sulfur bauxite associated with cobalt minerals in some embodiments of the present disclosure. Specific embodiments

[0052] The technical solutions in some embodiments of the present disclosure will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0053] Unless otherwise required by the context, the term "comprising" is interpreted as open and inclusive throughout the specification and claims, that is, "including, but not limited to".

[0054] When describing some embodiments, the expression "A and / or B" may be used. It is easy to understand that "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0055] When describing some embodiments, the expressions "at least one of A, B, and C" and "at least one of A, B, or C" may be used, and both have the same meaning, including the following combinations of A, B, and C: only A, only B, only C, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0056] Example 1

[0057] 1. Ore characteristics

[0058] A high-sulfur bauxite in a certain place, the S content in the high-sulfur bauxite is 15.06% and the Co content is 63.05 g / t. The Al 2 O 3 content is relatively high, and the SiO 2The content is relatively low, the alumina-silica ratio is 8.92, and the S content is greater than 15%, belonging to typical high-sulfur bauxite. The main minerals in the ore are diaspore, followed by kaolinite, chlorite, quartz, etc.; the sulfide minerals in the ore mainly exist in the forms of pyrite and pyrrhotite. On the basis of the research on the chemical and material composition of the ore, through EDS phase analysis, it is further illustrated that the overall property of the ore is cobalt-bearing high-sulfur bauxite.

[0059] 2. Ore Dressing Method

[0060] The process of this ore dressing method is as Figure 1 shown, and its detailed steps include:

[0061] S1. Grind the high-sulfur bauxite (i.e., the raw ore), with the grinding fineness of -0.074mm content being 80%, to obtain the sample for flotation.

[0062] S2. Add activator citric acid 220g / t·raw ore, combined collector (by mass ratio, isoamyl potassium xanthate: sodium dibutyldithiophosphate = 1:1) 140g / t·raw ore, and brittle foaming agent propylene glycol ethyl ether 15g / t·raw ore to the sample for flotation in sequence. After fully adjusting the pulp, charge air for rough selection of sulfur-cobalt enrichment (i.e., rough selection), and the number of rough selection of sulfur-cobalt enrichment is 1 time to obtain rough concentrate and rough selection tailings.

[0063] S3. Conduct cleaning on the rough concentrate, and the number of cleaning is 3 times, namely cleaning I, cleaning II, and cleaning III, to obtain sulfur-cobalt mixed concentrate and cleaning middlings; among them, the rough concentrate passes through cleaning I to obtain the first middlings and the first concentrate, the first concentrate passes through cleaning II to obtain the second middlings and the second concentrate, the second concentrate passes through cleaning III to obtain the third middlings and sulfur-cobalt mixed concentrate, and the first middlings, the second middlings, and the third middlings are combined to obtain cleaning middlings and are centrally returned to the rough selection of sulfur-cobalt enrichment; inhibitor phytic acid 50g / t·raw ore is added in cleaning I, and cleaning II and cleaning III are blank cleanings.

[0064] S4. Add combined collector (by mass ratio, isoamyl potassium xanthate: sodium dibutyldithiophosphate = 1:1) 30g / t·raw ore to the rough selection tailings for scavenging, and the number of scavenging is 1 time to obtain upgraded bauxite (i.e., tailings) and scavenging middlings; among them, the scavenging middlings are returned to the rough selection of sulfur-cobalt enrichment.

[0065] 3. Ore Dressing Test Index

[0066] Based on the ore characteristics, on the basis of detailed conditional tests, the process flow of "one rough selection - one scavenging - three cleanings" is adopted, and with the addition of appropriate dosages of flotation reagents, sulfur-cobalt enrichment is better achieved, obtaining sulfur-cobalt mixed concentrate, and the closed-circuit test indexes are shown in Table 1.

[0067] Table 1

[0068]

[0069] According to the results in Table 1, the closed-circuit test obtained a sulfur-cobalt mixed concentrate with a Co grade of 164.00 g / t, an S grade of 45.01%, a Co recovery rate of 85.12%, and an S recovery rate of 97.81%. Moreover, the Co content in the tailings was only 13.95 g / t and the S content was only 0.49%.

[0070] Example 2

[0071] 1. Ore characteristics

[0072] The ore characteristics in this example are the same as those in Example 1.

[0073] 2. Mineral processing method

[0074] The process of this mineral processing method is as Figure 1 shown, and its detailed steps include:

[0075] S1. Grind the high-sulfur bauxite (i.e., the raw ore), with the grinding fineness of -0.074 mm content being 80%, to obtain the sample for flotation.

[0076] S2. Add activator tartaric acid 200 g / t·raw ore, combined collector (by mass ratio, isoamyl potassium xanthate: sodium dibutyldithiophosphate = 2:1) 120 g / t·raw ore, and brittle foaming agent methyl carbitol 20 g / t·raw ore to the sample for flotation in sequence. After fully conditioning the pulp, charge air for rough selection of sulfur-cobalt enrichment (i.e., roughing). The number of rough selection of sulfur-cobalt enrichment is 1 time to obtain rough concentrate and roughing tailings.

[0077] S3. Carry out cleaning on the rough concentrate. The number of cleaning is 3 times, namely cleaning I, cleaning II, and cleaning III, to obtain sulfur-cobalt mixed concentrate and cleaning middlings. Among them, the rough concentrate passes through cleaning I to obtain the first middlings and the first concentrate, the first concentrate passes through cleaning II to obtain the second middlings and the second concentrate, the second concentrate passes through cleaning III to obtain the third middlings and sulfur-cobalt mixed concentrate, and the first middlings, the second middlings, and the third middlings are combined to obtain cleaning middlings and are centrally returned to the rough selection of sulfur-cobalt enrichment; inhibitor phytic acid 50 g / t·raw ore is added in cleaning I, and cleaning II and cleaning III are blank cleanings.

[0078] S4. Add combined collector (by mass ratio, isoamyl potassium xanthate: sodium dibutyldithiophosphate = 2:1) 40 g / t·raw ore to the roughing tailings for scavenging. The number of scavenging is 1 time to obtain upgraded bauxite (i.e., tailings) and scavenging middlings. Among them, the scavenging middlings are returned to the rough selection of sulfur-cobalt enrichment.

[0079] 3. Mineral processing test indexes

[0080] Based on the ore characteristics, on the basis of detailed conditional tests, a process flow of "one roughing - one scavenging - three cleanings" is adopted, combined with the addition of appropriate dosages of flotation reagents, which better realizes the enrichment of sulfur and cobalt, obtains a sulfur - cobalt mixed concentrate, and the closed - circuit test indexes are shown in Table 2.

[0081] Table 2

[0082]

[0083] According to the results in Table 2, a sulfur - cobalt mixed concentrate with a Co grade of 164.05 g / t, an S grade of 45.06%, a Co recovery rate of 85.09%, and an S recovery rate of 97.85% was obtained in the closed - circuit test, and the Co content in the tailings was only 13.97 g / t and the S content was only 0.48%.

[0084] Example 3

[0085] 1. Ore characteristics

[0086] The ore characteristics in this example are the same as those in Example 1.

[0087] 2. Mineral processing method

[0088] The process flow of this mineral processing method is as Figure 1 shown, and its detailed steps include:

[0089] S1. Grind the high - sulfur bauxite (i.e., the raw ore), with the grinding fineness of - 0.074 mm content being 80%, to obtain the sample for flotation.

[0090] S2. Add the activator nitrilotriacetic acid 200 g / t·raw ore, the combined collector (by mass ratio, isopentyl potassium xanthate: sodium dibutyldithiophosphate = 3:1) 160 g / t·raw ore, and the brittle foaming agent propylene glycol ethyl ether 20 g / t·raw ore to the sample for flotation in sequence. After sufficient pulp mixing, air is introduced for roughing of sulfur - cobalt enrichment (i.e., roughing), and the number of roughing times for sulfur - cobalt enrichment is 1 time, to obtain the rough concentrate and the roughing tailings.

[0091] S3. Clean the rough concentrate, and the number of cleaning times is 3 times, namely cleaning I, cleaning II, and cleaning III, to obtain the sulfur - cobalt mixed concentrate and the cleaning middlings; among them, the rough concentrate passes through cleaning I to obtain the first middling and the first concentrate, the first concentrate passes through cleaning II to obtain the second middling and the second concentrate, the second concentrate passes through cleaning III to obtain the third middling and the sulfur - cobalt mixed concentrate, and the first middling, the second middling, and the third middling are combined to obtain the cleaning middlings and are centrally returned to the roughing of sulfur - cobalt enrichment; 50 g / t·raw ore of the inhibitor phytic acid is added in cleaning I, and cleaning II and cleaning III are blank cleanings.

[0092] S4. Add a combined collector (by mass ratio, isopentyl potassium xanthate: sodium dibutyldithiophosphate = 3:1) of 35 g / t of raw ore to the rougher tailings, conduct scavenging for 1 time to obtain upgraded bauxite (i.e., tailings) and scavenging middlings; among them, the scavenging middlings are returned to the roughing of sulfur-cobalt enrichment.

[0093] 3. Mineral processing test indexes

[0094] Based on the ore characteristics and on the basis of detailed conditional tests, a process flow of "one roughing - one scavenging - three cleanings" is adopted, and by adding appropriate amounts of flotation reagents, sulfur-cobalt enrichment is better achieved, obtaining a sulfur-cobalt mixed concentrate. The closed-circuit test indexes are shown in Table 3.

[0095] Table 3

[0096]

[0097] According to the results in Table 3, the closed-circuit test obtained a sulfur-cobalt mixed concentrate with a Co grade of 164.10 g / t, an S grade of 45.06%, a Co recovery rate of 85.06%, and an S recovery rate of 97.85%. Moreover, the Co content in the tailings is only 13.99 g / t and the S content is only 0.48%.

[0098] Control Example 1

[0099] Compare Control Example 1 with Example 1. Among them, Control Example 1 uses the same raw ore as Example 1. The difference between Control Example 1 and Example 1 is that the activator citric acid is replaced by sodium sulfide; other conditions such as the selection of the remaining reagents, the dosage of the reagents, and the process conditions are the same as those in Example 1.

[0100] The closed-circuit test indexes of Control Example 1 are shown in Table 4.

[0101] Table 4

[0102]

[0103] Comparing Comparative Example 1 and Control Example 1, it can be seen that for the sulfur-cobalt mixed concentrate obtained using citric acid as the activator, the Co grade is 164.00 g / t, the S grade is 45.01%, the Co recovery rate is 85.12%, and the S recovery rate is 97.81%. Moreover, the Co content in the tailings is only 13.95 g / t and the S content is only 0.49%. For the sulfur-cobalt mixed concentrate obtained using sodium sulfide as the activator, the quality deteriorates. Its Co grade is 142.79 g / t, the S grade is 41.95%, the Co recovery rate is 78.16%, and the S recovery rate is 96.17%. The Co content in the tailings is 21.02 g / t and the S content is 0.88%. This shows that using citric acid as the activator has a better activation effect on sulfide ores and is beneficial to the enrichment and recovery of S and Co in high-sulfur bauxite associated with cobalt minerals.

[0104] Control Example 2

[0105] Comparing Control Example 2 with Example 1, where Control Example 2 uses the same raw ore as Example 1. The difference between Control Example 2 and Example 1 is that the inhibitor phytic acid is replaced with water glass. Other conditions such as the selection of the remaining reagents, the dosage of the reagents, and the process conditions are the same as those in Example 1.

[0106] The closed-circuit test indexes of Control Example 2 are shown in Table 5.

[0107] Table 5

[0108]

[0109] Comparing Example 1 and Control Example 2, it can be seen that for the sulfur-cobalt mixed concentrate obtained using phytic acid as the inhibitor, the Co grade is 164.00 g / t, the S grade is 45.01%, the Co recovery rate is 85.12%, and the S recovery rate is 97.81%. Moreover, the Co content in the tailings is only 13.95 g / t and the S content is only 0.49%. For the sulfur-cobalt mixed concentrate obtained using water glass as the inhibitor, the quality deteriorates. Its Co grade is 146.88 g / t, the S grade is 44.43%, the Co recovery rate is 75.83%, and the S recovery rate is 96.01%. The Co content in the tailings is 22.59 g / t and the S content is 0.89%. This shows that using phytic acid as the scavenging inhibitor has a better effect.

[0110] Control Example 3

[0111] Comparative Example 3 was compared with Example 1. In Comparative Example 3, the same original ore as in Example 1 was used. The difference between Comparative Example 3 and Example 1 is that the return method of middlings was replaced with step-by-step return, that is, the first-stage middlings were returned to the rough selection of sulfur-cobalt enrichment, the second-stage middlings were returned to the first-stage cleaning, the third-stage middlings were returned to the second-stage cleaning, and the scavenging middlings were returned to the rough selection of sulfur-cobalt enrichment; other conditions such as the selection of reagents, the dosage of reagents, and process conditions were the same as those in Example 1.

[0112] The closed-circuit test indexes of Comparative Example 3 are shown in Table 6.

[0113] Table 6

[0114]

[0115] Comparing Example 1 and Comparative Example 3, it can be seen that under the conditions of the same reagent types and dosages, the Co grade of the sulfur-cobalt mixed concentrate obtained by using the return method of middlings in Example 1 was 164.00 g / t, the S grade was 45.01%, the Co recovery rate was 85.12%, and the S recovery rate was 97.81%. Moreover, the Co content in the tailings was only 13.95 g / t and the S content was only 0.49%; the quality of the sulfur-cobalt mixed concentrate obtained by using the step-by-step return method of middlings decreased slightly, with a Co grade of 155.76 g / t, an S grade of 44.97%, a Co recovery rate of 78.51%, and an S recovery rate of 95.10%. The Co content in the tailings was 19.86 g / t and the S content was 1.08%. This shows that the return method of middlings in Example 1 has a better recovery effect on sulfur and cobalt.

[0116] Comparative Example 4

[0117] Comparative Example 4 was compared with Example 1. In Comparative Example 4, the same original ore as in Example 1 was used. The difference between Comparative Example 4 and Example 1 is that the combined collector (isoamyl potassium xanthate + sodium dibutyldithiophosphate) was replaced with a conventional single sulfide ore collector (butyl xanthate); other conditions such as the selection of the remaining reagents, the dosage of reagents, and process conditions were the same as those in Example 1.

[0118] The closed-circuit test indexes of Comparative Example 4 are shown in Table 7.

[0119] Table 7

[0120]

[0121]

[0122] Comparing Comparative Example 1 and Control Example 4, it can be seen that for the sulfur-cobalt bulk concentrate obtained by using isopentyl potassium xanthate + sodium dibutyl dithiophosphate as the collector, the Co grade is 164.00 g / t, the S grade is 45.01%, the Co recovery rate is 85.12%, and the S recovery rate is 97.81%. Moreover, the Co content in the tailings is only 13.95 g / t and the S content is only 0.49%. When using butyl xanthate as the collector, the quality of the sulfur-cobalt bulk concentrate deteriorates. Its Co grade is 150.76 g / t, the S grade is 44.97%, the Co recovery rate is 76.35%, and the S recovery rate is 95.39%. The Co content in the tailings is 21.90 g / t and the S content is 1.02%. This shows that using a combined collector has a better recovery effect on S and Co in high-sulfur bauxite associated with cobalt minerals.

[0123] Control Example 5

[0124] Comparing Control Example 5 with Example 1, where Control Example 5 uses the same raw ore as Example 1. The difference between Control Example 5 and Example 1 is that the combined collector is replaced with isopentyl potassium xanthate; other conditions such as the selection of the remaining reagents, the dosage of the reagents, and the process conditions are the same as those in Example 1.

[0125] The closed-circuit test indexes of Control Example 5 are shown in Table 8.

[0126] Table 8

[0127]

[0128] Comparing Example 1 and Control Example 5, it can be seen that for the sulfur-cobalt bulk concentrate obtained by using the combined collector, the Co grade is 164.00 g / t, the S grade is 45.01%, the Co recovery rate is 85.12%, and the S recovery rate is 97.81%. Moreover, the Co content in the tailings is only 13.95 g / t and the S content is only 0.49%. When using only isopentyl potassium xanthate as the collector, the quality of the sulfur-cobalt bulk concentrate deteriorates. Its Co grade is 158.07 g / t, the S grade is 44.01%, the Co recovery rate is 82.86%, and the S recovery rate is 96.71%. The Co content in the tailings is 16.14 g / t and the S content is 0.74%. This shows that the effect of using the combined collector is better.

[0129] Control Example 6

[0130] Comparing Control Example 6 with Example 1, where Control Example 6 uses the same raw ore as Example 1. The difference between Control Example 6 and Example 1 is that the combined collector is replaced with sodium dibutyl dithiophosphate; other conditions such as the selection of the remaining reagents, the dosage of the reagents, and the process conditions are the same as those in Example 1.

[0131] The closed-circuit test indexes of Comparative Example 6 are shown in Table 9.

[0132] Table 9

[0133]

[0134] Comparing Example 1 and Comparative Example 6, it can be seen that for the cobalt-sulfur mixed concentrate obtained by using the combined collector, the Co grade is 164.00 g / t, the S grade is 45.01%, the Co recovery rate is 85.12%, and the S recovery rate is 97.81%. Moreover, the Co content in the tailings is only 13.95 g / t and the S content is only 0.49%. When using sodium dibutyl dithiophosphate alone as the collector, the quality and recovery rate of the cobalt-sulfur mixed concentrate are both lower. Its Co grade is 163.85 g / t, the S grade is 44.98%, the Co recovery rate is 82.03%, and the S recovery rate is 94.32%. The Co content in the tailings is 16.55 g / t and the S content is 1.25%. This shows that the effect of using the combined collector is better.

[0135] Therefore, the flotation reagent, its application and comprehensive utilization method of high-sulfur bauxite associated with cobalt minerals provided by the present disclosure can at least achieve the effect of not only improving the quality of the obtained bauxite, but also fully recovering the associated sulfur-cobalt resources in the high-sulfur bauxite, thus contributing to improving the comprehensive utilization rate of high-sulfur bauxite resources associated with cobalt minerals.

[0136] The above are only the preferred embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present disclosure shall fall within the protection scope of the appended claims of the present disclosure.

Claims

1. A flotation reagent for high-sulfur bauxite with associated cobalt minerals, characterized in that: Includes a combination of collector, depressant, activator and brittle foaming agent; Wherein, the combined collector comprises isopentyl potassium xanthate and dibutyl sodium dithiophosphate; Such inhibitors include phytate.

2. The flotation reagent according to claim 1, characterized in that: The activator comprises one of citric acid, tartaric acid and nitrilotriacetic acid; And / or, the brittle foaming agent includes one of methyl carbitol and propylene glycol ethyl ether.

3. The flotation reagent according to claim 1, characterized in that: The mass ratio of the isopentyl potassium xanthate to the dibutyl sodium dithiophosphate is 1 to 3:

1.

4. Use of the flotation reagent as claimed in any one of claims 1 to 3 in the flotation of high-sulfur bauxite with associated cobalt minerals.

5. A method for comprehensive utilization of high-sulfur bauxite with associated cobalt minerals, characterized in that: Using the flotation reagent as described in any one of claims 1 to 3; the comprehensive utilization method comprises: Grinding the high-sulfur bauxite to obtain a flotation sample; The activator, the combined collector and the brittle frother are added to the flotation sample, and after slurry adjustment, sulfur-cobalt enrichment and roughing are performed to obtain a rough concentrate and roughing tailings; adding the inhibitor to the coarse concentrate to perform beneficiation to obtain a sulfur-cobalt mixed concentrate; and The combined collector is added to the roughing tailings for scavenging to obtain upgraded bauxite.

6. The comprehensive utilization method according to claim 5, characterized in that: The concentrated ore is also obtained after the concentration; the comprehensive utilization method also includes: The concentrated middlings are returned to the sulfur-cobalt-enriched rougher.

7. The comprehensive utilization method according to claim 5, characterized in that: In the sulfur-cobalt enrichment roughing, the dosage of the activator is 180-240 g / t·original ore, the dosage of the combined collector is 120-160 g / t·original ore, and the dosage of the brittle foaming agent is 12-20 g / t·original ore.

8. The ore dressing method according to claim 5, characterized in that: In the concentration, the dosage of the inhibitor is 40-60 g / t·original ore.

9. The ore dressing method according to claim 5, characterized in that: In the scanning, the dosage of the combined collector is 30-40 g / t·original ore.

10. The ore dressing method according to claim 5, characterized in that: The mass percentage of minerals with a particle size of -0.074 mm in the floating sample is 75% to 83%.

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