Iron separation and titanium separation method for high-iron vanadium titano-magnetite

Abstract

The invention discloses an iron separation and titanium separation method for high-iron vanadium titano-magnetite, and belongs to the field of vanadium titano-magnetite separation. The method comprises the following steps that after raw ore is crushed, ore grinding is conducted, iron ore concentrate 1 is recycled through low intensity magnetic separation, and tailings are subjected to two-section gradient high intensity magnetic separation to enrich titanium minerals; the strong magnetic concentrate is subjected to flotation to obtain titanium concentrate 1, middlings are reground and then subjected to low intensity magnetic separation to recover iron concentrate 2, tailings are subjected to three-stage strong magnetic separation and two-stage flotation to obtain titanium concentrate 2, and dilute sulphuric acid, sodium oleate and an inhibitor are adopted in flotation to cooperatively regulate and control the ore pulp environment. According to the method, excessive grinding is reduced through stage grinding, the quality of flotation raw materials is stabilized through gradient magnetic separation, the titanium recovery rate is optimized through the flotation technology, efficient separation of the iron ore concentrate and the titanium concentrate is achieved, the problems that iron and titanium of the high-iron type vanadium titano-magnetite are uneven in dissemination and low in separation efficiency are solved, and the method has the advantages of being high in resource utilization rate and stable in concentrate quality.

Description

Technical Field

[0001] The present invention belongs to the field of beneficiation of vanadium-titanium magnetite ores, and particularly relates to a method for separating iron and titanium from high-iron vanadium-titanium magnetite ores. Background Art

[0002] Vanadium-titanium magnetite ore is a typical multi-metal symbiotic ore, whose main components are elements such as iron, titanium, and vanadium, and it has characteristics such as complex composition, uneven mineral dissemination particle size, and significant spatial distribution differences. The iron minerals in the ore are mainly magnetite, and the titanium minerals are mainly ilmenite. The two often coexist in the form of fine-grained dissemination or inclusions, and some coarse-grained minerals and fine-grained minerals are mixedly distributed, resulting in great difficulty in separating iron and titanium. Among such ores, high-iron vanadium-titanium magnetite ore (with TFe content of 17% - 30% and TiO₂ content of 4% - 8%) is particularly typical. Its iron grade is relatively high but the titanium content is relatively low, and the particle size span of iron and titanium minerals is large, with a high proportion of fine-grained grades. Traditional gravity separation processes are difficult to effectively enrich it, and it is necessary to rely on combined processes such as magnetic separation and flotation to achieve resource recovery.

[0003] With the increasing demand for the efficient utilization of mineral resources, the comprehensive recovery of vanadium-titanium magnetite ore needs to take into account the quality and recovery rate of iron and titanium concentrates. However, there are still many challenges in the actual application of existing beneficiation technologies: First, the mineral dissemination characteristics are complex, and a single grinding process is prone to over-grinding or insufficient dissociation, affecting the subsequent separation efficiency; Second, the conventional magnetic separation - flotation combined process has insufficient adaptability to ores with uneven particle size distribution. Coarse-grained minerals are easily lost in the tailings, and fine-grained minerals are difficult to effectively float due to surface contamination; Third, the pulp turbulence degree is high and the foam stability is poor during the flotation process, resulting in a low recovery rate of titanium minerals; Fourth, the flexibility of the existing reagent system is insufficient, and it is difficult to adapt to the differences in the surface properties of ores in different mining areas, and the concentrate grade is prone to fluctuations.

[0004] In response to the above problems, existing technologies mostly adopt pre-selection for tailing discarding, stage grinding and separation, or optimization of combined processes. However, due to the diversity of ore sources, their process parameters and process structures are difficult to be universal. For example, although the pre-tailing discarding process can reduce the processing volume, it is easy to cause premature loss of valuable minerals for ores with uneven dissemination; and in the conventional stage grinding and separation, due to inaccurate particle size control, it is easy to cause over-crushing or insufficient dissociation of iron and titanium minerals, affecting the separation effect. In addition, the traditional flotation process has insufficient control over the pulp flow pattern, further restricting the efficient recovery of titanium minerals.

[0005] Therefore, there is an urgent need to develop a beneficiation method for high-iron vanadium-titanium magnetite ore characteristics, which can, on the basis of accurately controlling the mineral dissociation degree, through process optimization and parameter adaptation, achieve the efficient separation and synchronous enrichment of iron and titanium, while taking into account the concentrate quality and resource recovery rate, and provide technical support for the comprehensive utilization of complex vanadium-titanium magnetite ores. Summary of the Invention

[0006] The technical problems to be solved by the present invention are the difficulties in separating iron and titanium, low recovery rate, unstable concentrate quality in the beneficiation of high-iron vanadium-titanium magnetite ore, and the problem that the turbulence degree in the flotation process affects the recovery efficiency of titanium minerals.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows.

[0008] A method for separating iron and titanium from high-iron vanadium-titanium magnetite ore includes the following steps:

[0009] The original high-iron vanadium-titanium magnetite ore is crushed and then enters the first-stage ball milling. The material after the first-stage ball milling is subjected to the first-stage weak magnetic separation to obtain iron concentrate 1; the tailings of the first-stage weak magnetic separation enter the first-stage strong magnetic separation, the concentrate of the first-stage strong magnetic separation enters the second-stage strong magnetic separation, and the concentrate of the second-stage strong magnetic separation enters a series of rough selections;

[0010] The underflow product of a series of rough selections enters a series of scavenging I to obtain flotation tailings 1; the overflow product of a series of rough selections enters a series of cleaning I, the overflow product of a series of cleaning I enters a series of cleaning II, the overflow product of a series of cleaning II enters a series of cleaning III to obtain titanium concentrate 1; the underflow product of a series of cleaning I and the overflow product of a series of scavenging I are combined and enter a series of rough selections; the underflow product of a series of cleaning II enters a series of cleaning I; the underflow product of a series of cleaning III enters a series of cleaning II;

[0011] The tailings of the first-stage strong magnetic separation, the tailings of the second-stage strong magnetic separation, and flotation tailings 1 are combined and enter the second-stage ball milling. The material after the second-stage ball milling is subjected to the second-stage weak magnetic separation to obtain iron concentrate 2; the tailings of the second-stage weak magnetic separation enter the third-stage strong magnetic separation to obtain magnetic separation tailings; the concentrate of the third-stage strong magnetic separation enters the second series of rough selections;

[0012] The underflow product of the second series of rough selections enters the second series of scavenging I to obtain flotation tailings 2; the overflow product of the second series of rough selections enters the second series of cleaning I, the overflow product of the second series of cleaning I enters the second series of cleaning II to obtain titanium concentrate 2; the underflow product of the second series of cleaning I and the overflow product of the second series of scavenging I are combined and enter the second series of rough selections; the underflow product of the second series of cleaning II enters the second series of cleaning I.

[0013] In the above method for separating iron and titanium, the TFe grade of the original high-iron vanadium-titanium magnetite ore is 17 - 30%, the TiO2 grade is 4 - 8%, and its particle size is D 80 = 15 mm.

[0014] In the above method for separating iron and titanium, the original high-iron vanadium-titanium magnetite ore is crushed to a product particle size where -1 mm accounts for 90 - 100%.

[0015] Furthermore, the original high-iron vanadium-titanium magnetite ore is crushed to a product particle size where -1 mm accounts for more than 95%.

[0016] In the above iron and titanium separation methods, the particle size of the material after the first-stage ball milling is such that the proportion of particles with a size of -0.074 mm is 50 - 70%.

[0017] Further, the proportion of particles with a size of -0.074 mm in the material after the first-stage ball milling is 60%.

[0018] In the above iron and titanium separation methods, the particle size of the material after the second-stage ball milling is such that the proportion of particles with a size of -0.074 mm is 70 - 90%.

[0019] Further, the proportion of particles with a size of -0.074 mm in the material after the second-stage ball milling is 88%.

[0020] In the above iron and titanium separation methods, the magnetic field intensity of the first-stage weak magnetic separation is 1200 - 2000 Gs.

[0021] In the above iron and titanium separation methods, the magnetic field intensity of the second-stage weak magnetic separation is 1200 - 1800 Gs.

[0022] In the above iron and titanium separation methods, the magnetic field intensity of the first-stage strong magnetic separation is 7000 - 9000 Gs.

[0023] Further, the magnetic field intensity of the first-stage strong magnetic separation is 8000 Gs.

[0024] In the above iron and titanium separation methods, the magnetic field intensity of the second-stage strong magnetic separation is 6000 - 8000 Gs.

[0025] Further, the magnetic field intensity of the second-stage strong magnetic separation is 7000 Gs.

[0026] In the above iron and titanium separation methods, the magnetic field intensity of the third-stage strong magnetic separation is 7500 - 8500 Gs.

[0027] Further, the magnetic field intensity of the third-stage strong magnetic separation is 8500 Gs.

[0028] In the above iron and titanium separation methods, during a series of rough selections, a mixture of dilute sulfuric acid, sodium oleate, a mixture of sodium fluorosilicate and oxalic acid, and diesel are added and stirred well; among them, the addition amount of dilute sulfuric acid is 0 - 3000 g / t, the addition amount of sodium oleate is 0 - 2500 g / t, the addition amount of the mixture of sodium fluorosilicate and oxalic acid is 0 - 300 g / t, and the addition amount of diesel is 0 - 1000 g / t.

[0029] Further, the mass ratio of sodium fluorosilicate to oxalic acid in the mixture is 2:1.

[0030] Further, the concentration of dilute sulfuric acid is 25.0%.

[0031] In the above iron and titanium separation methods, the scraping time for a series of rough selections is 4 - 6 min.

[0032] In the above iron and titanium separation methods, the roughing equipment in the second series is a flotation column.

[0033] In the above iron and titanium separation methods, during the roughing in the second series, a mixture of dilute sulfuric acid, sodium oleate, sodium hexametaphosphate, sodium fluorosilicate and oxalic acid, and diesel are added and stirred well; among them, the addition amount of dilute sulfuric acid is 0 - 3500 g / t, the addition amount of sodium oleate is 0 - 3000 g / t, the addition amount of sodium hexametaphosphate is 0 - 1800 g / t, the addition amount of the mixture of sodium fluorosilicate and oxalic acid is 0 - 300 g / t, and the addition amount of diesel is 0 - 1000 g / t.

[0034] Furthermore, the mass ratio of sodium fluorosilicate to oxalic acid in the mixture is 2:1 g.

[0035] Furthermore, the concentration of dilute sulfuric acid is 25.0%.

[0036] In the above iron and titanium separation methods, the froth scraping time for the roughing in the second series is 4 - 6 min.

[0037] In the above iron and titanium separation methods, during the first scavenging in the first series, sodium oleate is added and stirred well; the addition amount of sodium oleate is 5% of the addition amount of sodium oleate in the roughing of the first series; the froth scraping time for the first scavenging in the first series is 4 - 6 min.

[0038] In the above iron and titanium separation methods, during the first scavenging in the second series, sodium oleate is added and stirred well; the addition amount of sodium oleate is 15% of the addition amount of sodium oleate in the roughing of the second series; the froth scraping time for the first scavenging in the second series is 4 - 6 min.

[0039] In the above iron and titanium separation methods, during the first cleaning in the first series, the second cleaning in the first series, and the third cleaning in the first series, appropriate amount of dilute sulfuric acid is added and stirred well.

[0040] Furthermore, the concentration of dilute sulfuric acid is 25.0%.

[0041] In the above iron and titanium separation methods, the froth scraping time for the first cleaning in the first series is 4 - 6 min.

[0042] In the above iron and titanium separation methods, the froth scraping time for the second cleaning in the first series is 2 - 4 min.

[0043] In the above iron and titanium separation methods, the froth scraping time for the third cleaning in the first series is 1 - 3 min.

[0044] In the above iron and titanium separation methods, during the first cleaning in the second series and the second cleaning in the second series, appropriate amount of dilute sulfuric acid is added and stirred well.

[0045] Furthermore, the concentration of dilute sulfuric acid is 25.0%.

[0046] In the above iron and titanium separation methods, the froth scraping time for the second series of roughing I is 4 - 6 minutes.

[0047] In the above iron and titanium separation methods, the froth scraping time for the second series of roughing II is 1 - 4 minutes.

[0048] In view of the problems of low separation efficiency of iron and titanium, large fluctuations in concentrate grade, and insufficient resource recovery rate in high-iron vanadium-titanium magnetite, the present invention realizes the efficient separation and comprehensive recovery of iron and titanium minerals by optimizing the combined process of stage grinding - magnetic separation - flotation.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. Significantly improved iron and titanium separation efficiency: Through the synergistic effect of stage grinding and gradient magnetic separation, the mineral dissociation degree is precisely controlled, and the over-grinding phenomenon is reduced. The data of the examples show that the grade of iron concentrate 1 is stable above 60%, and the recovery rate reaches 45% - 46%; the grade of titanium concentrate 1 reaches 47% - 48%, and the total titanium recovery rate is increased to 34% - 37%, effectively solving the problems of high mutual inclusion rate and low recovery rate of iron and titanium in the traditional process.

[0051] 2. Optimization of flotation process stability and titanium recovery rate: Adopting a two-stage flotation system (one roughing, two scavenging, three cleaning and one roughing, one scavenging, two cleaning) combined with a middle ore treatment mechanism of sequential return significantly reduces the loss of titanium minerals. By optimizing the reagent system (gradient addition of dilute sulfuric acid, sodium oleate, sodium fluorosilicate, etc.) and the application of flotation columns, the pulp turbulence is reduced and the foam stability is improved. In the examples, the highest grade of titanium concentrate 1 can reach 48.34%, and the titanium recovery rate is significantly improved compared with the conventional process, solving the technical bottleneck of low recovery efficiency of titanium minerals in the flotation process.

[0052] 3. Double improvement of resource utilization rate and economic benefits: Through re-grinding and re-selection of middle ore (combined treatment of tailings from the first-stage high-intensity magnetic separation, tailings from the second-stage high-intensity magnetic separation, and flotation tailings) and multi-product recovery design, iron and titanium resources are recovered to the maximum extent. In the examples, the grade of iron concentrate 2 reaches 56% - 58%, the grade of titanium concentrate 2 reaches above 42%, and the contents of TFe and TiO2 in the tailings are significantly reduced, realizing the balance of resource cascade utilization and tailing rejection efficiency and reducing the subsequent treatment cost.

[0053] 4. Enhanced process adaptability and flexibility: The flexible adjustment of the gradient magnetic field intensity (such as 8000 Gs → 7000 Gs → 8500 Gs in high-intensity magnetic separation) and the dosage range of reagents can adapt to raw ores with different dissemination sizes and grades. In Examples 2 and 3, by adjusting the magnetic field intensity or the dosage of reagents, the recovery rates of iron and titanium and the concentrate grade still remain stable, verifying the stability and industrial application potential of the process.

[0054] In summary, through the integrated innovation of stage dissociation, gradient sorting, and enhanced flotation, the present invention provides a reliable technical solution for the efficient sorting of high-iron vanadium-titanium magnetite, with advantages such as stable concentrate quality, high resource recovery rate, and controllable comprehensive cost, which is of great significance for promoting the green development of complex associated mineral resources. Description of the Drawings

[0055] Figure 1 It is a process flow diagram of the iron and titanium separation methods for high-iron vanadium-titanium magnetite. Detailed Embodiments

[0056] In order to make the technical problems to be solved, technical solutions, and beneficial effects of this application clearer, the following further details this application in combination with the embodiments. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those of ordinary skill in the art.

[0057] I. Iron and Titanium Separation Methods for High-Iron Vanadium-Titanium Magnetite

[0058] The present invention provides three groups of Examples 1 to 3 for the iron and titanium separation of high-iron vanadium-titanium magnetite using the method of the present invention. Among them, the indicators of the high-iron vanadium-titanium magnetite (original vanadium-titanium magnetite ore) used in the examples are shown in Table 1:

[0059] Table 1 Indicators of Original Vanadium-Titanium Magnetite Ore

[0060] TFe grade <![CDATA[TiO2 grade]]> Particle size Example 1 18.42％ 6.47％ <![CDATA[D 80 = 15 mm]]> Example 2 18.39％ 6.41％ <![CDATA[D 80 = 15 mm]]> Example 3 18.54％ 6.44％ <![CDATA[D 80 = 15mm]]>

[0061] Example 1: The iron and titanium separation method for high-iron vanadium-titanium magnetite, the specific steps are as follows:

[0062] (1) The original vanadium-titanium magnetite ore is crushed to a product particle size of -1 mm;

[0063] (2) The crushed product enters the first-stage ball milling, and the particle size of the material after the first-stage ball milling is 60% -0.074 mm;

[0064] (3) The material after the first-stage ball milling is subjected to first-stage weak magnetic separation (1600 Gs) to obtain iron concentrate 1;

[0065] (4) The tailings of the first-stage weak magnetic separation enter the first-stage strong magnetic separation (8000 Gs), the concentrate of the first-stage strong magnetic separation enters the second-stage strong magnetic separation (7000 Gs), the concentrate of the second-stage strong magnetic separation enters a series of rough selections, and the underflow product of a series of rough selections enters a series of scavenging I to obtain flotation tailings 1;

[0066] (5) The overflow product of a series of rough selections enters a series of first-stage fine selections, the overflow product of a series of first-stage fine selections enters a series of second-stage fine selections, and the overflow product of a series of second-stage fine selections enters a series of third-stage fine selections to obtain titanium concentrate 1;

[0067] (6) The underflow products of a series of roughing I and the overflow products of a series of scavenging I are combined and fed into a series of rougher; the underflow products of a series of cleaning II are fed into a series of cleaning I; the underflow products of a series of cleaning III are fed into a series of cleaning II;

[0068] (7) The tailings of the first-stage high-intensity magnetic separation, the tailings of the second-stage high-intensity magnetic separation, and the flotation tailings 1 are combined and fed into the second-stage ball mill. The particle size of the material after the second-stage ball mill is 88% -0.074mm;

[0069] (8) The material after the second-stage ball mill is subjected to second-stage low-intensity magnetic separation (1700 Gs) to obtain iron concentrate 2;

[0070] (9) The tailings of the second-stage low-intensity magnetic separation are fed into the third-stage high-intensity magnetic separation (8500 Gs) to obtain magnetic separation tailings;

[0071] (10) The concentrate of the third-stage high-intensity magnetic separation is fed into the second series of rougher. The equipment for the second series of rougher is a flotation column. The underflow products of the second series are fed into the second series of scavenging I to obtain flotation tailings 2;

[0072] (11) The overflow products of the second series of rougher are fed into the second series of cleaning I. The overflow products of the second series of cleaning I are fed into the second series of cleaning II to obtain titanium concentrate 2;

[0073] (12) The underflow products of the second series of cleaning I and the overflow products of the second series of scavenging I are combined and fed into the second series of rougher; the underflow products of the second series of cleaning II are fed into the second series of cleaning I.

[0074] For the above method of separating iron and titanium from high-iron vanadium-titanium magnetite, the specific process parameters (reagent addition amount and froth scraping time) of each roughing, cleaning, and scavenging process are shown in Table 2.

[0075] Table 2 Process Parameters

[0076]

[0077]

[0078] Example 2: Different from Example 1: In step (8), the material after the second-stage ball mill is subjected to second-stage low-intensity magnetic separation (1800 Gs) to obtain iron concentrate 2; the other steps are the same as in Example 1.

[0079] Example 3: Different from Example 1: In step (4), the addition amount of sodium oleate in the reagents for a series of rougher is adjusted to 2200 g / t; the other steps are the same as in Example 1.

[0080] II. Results of Separating Iron and Titanium from High-Iron Vanadium-Titanium Magnetite

[0081] The beneficiation products in Examples 1 to 3 were tested, and the results are shown in Table 3; among them, the tailings grade refers to the content of the main useful components in the tailings, which is TFe in the magnetic separation tailings and TiO2 in the flotation tailings 2.

[0082] Table 3 Product Detection

[0083]

Claims

1. A method for separating iron and titanium from high-speed railway vanadium-titanium magnetite, characterized in that, The steps include: After crushing, the vanadium-titanium magnetite ore enters the first stage of ball milling, and the ball-milled material undergoes a first stage of weak magnetic separation to obtain iron concentrate 1; the tailings from the first stage of weak magnetic separation enter the first stage of strong magnetic separation, the concentrate from the first stage of strong magnetic separation enters the second stage of strong magnetic separation, and the concentrate from the second stage of strong magnetic separation enters a series of roughing separations; The underflow products of a series of roughing are fed into a series of scavenging I to obtain flotation tailings 1; the overflow products of a series of roughing are fed into a series of concentrating I, the overflow products of a series of concentrating I are fed into a series of concentrating II, and the overflow products of a series of concentrating II are fed into a series of concentrating III to obtain titanium concentrate 1; the underflow products of a series of concentrating I and the overflow products of a series of scavenging I are combined and fed into a series of roughing; The bottom flow products of a series of selected products II enter a series of selected products I; the bottom flow products of a series of selected products III enter a series of selected products II; The tailings from the first stage of strong magnetic separation, the tailings from the second stage of strong magnetic separation and the flotation tailings 1 are combined and sent to the second stage of ball milling. The materials after ball milling are subjected to the second stage of weak magnetic separation to obtain iron concentrate 2; the tailings from the second stage of weak magnetic separation are sent to the third stage of strong magnetic separation to obtain magnetic separation tailings; the concentrate from the third stage of strong magnetic separation is sent to the second series of roughing; The underflow product of the second series roughing enters the second series scavenging I to obtain flotation tailings 2; the overflow product of the second series roughing enters the second series concentrating I, and the overflow product of the second series concentrating I enters the second series concentrating II to obtain titanium concentrate 2; the underflow product of the second series concentrating I and the overflow product of the second series scavenging I are combined and enter the second series roughing; the underflow product of the second series concentrating II enters the second series concentrating I.

2. The method for separating iron and titanium from high-iron vanadium-titanium magnetite according to claim 1, characterized in that: The TFe grade of the original vanadium-titanium magnetite ore is 17-30%, the TiO2 grade is 4-8%, and its particle size is D 80 = 15 mm.

3. The iron and titanium separation method for high-speed railway vanadium-titanium magnetite according to claim 1, characterized in that: The vanadium-titanium magnetite ore is crushed to a product particle size of -1 mm, accounting for 90-100%.

4. The method for selecting iron and titanium from high-iron-vanadium-titanium magnetite according to claim 1, characterized in that: The particle size of the material after the first stage of ball milling is -0.074mm, accounting for 50-70%; The particle size of the material after the second stage ball milling is -0.074mm, accounting for 70-90%.

5. The method for selecting iron and titanium from high-iron-vanadium-titanium magnetite according to claim 1, characterized in that: The magnetic field strength of the first stage of weak magnetic separation is 1200~2000Gs; The magnetic field strength of the second stage weak magnetic separation is 1200~1800Gs; The magnetic field strength of the first stage of strong magnetic separation is 7000~9000Gs; The magnetic field strength of the second stage strong magnetic separation is 6000~8000Gs; The magnetic field strength of the three-stage strong magnetic separation is 7500~8500Gs.

6. The method for separating iron and titanium from high-iron vanadium-titanium magnetite according to claim 1, characterized in that: During a series of roughing, dilute sulfuric acid, sodium oleate, a mixture of sodium fluorosilicate and oxalic acid, and diesel are added and stirred thoroughly. The scraping time is 4 to 6 minutes. The amount of dilute sulfuric acid added is 0-3000 g / t, the amount of sodium oleate added is 0-2500 g / t, the amount of the mixture of sodium fluorosilicate and oxalic acid added is 0-300 g / t, and the amount of diesel added is 0-1000 g / t; the mixing mass ratio of sodium fluorosilicate and oxalic acid is 2:

1.

7. The iron and titanium separation method for high-iron vanadium-titanium magnetite according to claim 1, characterized in that: In the second series roughing, dilute sulfuric acid, sodium oleate, sodium hexametaphosphate, a mixture of sodium fluorosilicate and oxalic acid, and diesel are added and stirred thoroughly. The scraping time is 4 to 6 minutes. The addition amount of dilute sulfuric acid is 0 - 3500 g / t, the addition amount of sodium oleate is 0 - 3000 g / t, the addition amount of sodium hexametaphosphate is 0 - 1800 g / t, the addition amount of the mixture of sodium fluorosilicate and oxalic acid is 0 - 300 g / t, and the addition amount of diesel is 0 - 1000 g / t; the mixing mass ratio of sodium fluorosilicate and oxalic acid is 2:

1.

8. The method for separating iron and titanium from high-iron vanadium-titanium magnetite according to claim 1, characterized in that: During a series of first-stage scavenging in series one and first-stage scavenging in series two, add sodium oleate and stir well, and the foam scraping time is 4 - 6 min; The addition amount of sodium oleate in the first-stage scavenging in series one is 5% of the addition amount of sodium oleate in the rough selection in series one; The addition amount of sodium oleate in the first-stage scavenging in series two is 15% of the addition amount of sodium oleate in the rough selection in series two.

9. The method for separating iron and titanium from high-iron vanadium-titanium magnetite according to claim 1, characterized in that: During a series of first-stage cleaning in series one, second-stage cleaning in series one, and third-stage cleaning in series one, add an appropriate amount of dilute sulfuric acid and stir well; The foam scraping time for the first-stage cleaning in series one is 4 - 6 min, the foam scraping time for the second-stage cleaning in series one is 2 - 4 min, and the foam scraping time for the third-stage cleaning in series one is 1 - 3 min.

10. The method for separating iron and titanium from high-iron vanadium-titanium magnetite according to claim 1, characterized in that: During the first-stage cleaning in series two and the second-stage cleaning in series two, add an appropriate amount of dilute sulfuric acid and stir well; The foam scraping time for the first-stage cleaning in series two is 4 - 6 min, and the foam scraping time for the second-stage cleaning in series two is 1 - 4 min.

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