A method for comprehensive recovery of fixed carbon and titanium resources in molten salt chloride slag

Abstract

The present invention discloses a method for comprehensive recovery of fixed carbon and titanium resources in molten salt chloride slag, which adopts pre-screening-coarse grain grinding-flotation to pre-enrich organic carbon-organic coarse concentrate, then grinding and flotation to select organic carbon concentrate-floating carbon tailings to screen coarse particles as titanium concentrate 1-flotation to recover fine-grained titanium concentrate 2, and recover fixed carbon and titanium resources, thereby achieving the effect of significant enrichment of fixed carbon and TiO2 components; overcoming the defects of molten salt chloride slag currently being treated by stacking or landfilling, which will occupy a large amount of land resources and have environmental risks. This method enables fixed carbon to be used as fuel, and the titanium concentrate product is used alone, added to the titanium concentrate electric furnace smelting operation, or as a sulfuric acid process titanium dioxide raw material, thereby achieving high-value recovery of solid waste, with the advantages of relatively low process cost and easy industrialization, and can be widely used in the comprehensive utilization field of vanadium titanium magnetite high calcium magnesium titanium concentrate molten salt chloride slag, and has great practical value and promotion value.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive utilization of vanadium-titanium magnetite, relates to the comprehensive utilization of primary ilmenite molten salt chlorination tailings, and specifically is a method for comprehensively recovering fixed carbon and titanium resources in the molten salt chlorination tailings. Background Art

[0002] Petroleum coke is a product produced by separating the light and heavy oils through distillation of crude oil, followed by thermal cracking of the heavy oil. It appears as irregularly shaped, black lumps or granules of varying sizes. Compared to metallurgical coke, it has lower density, lower ash content, and lower sulfur content. Its carbon grid flakes are more uniformly stacked and the distances between flakes are closer. Petroleum coke is primarily used in graphite production, smelting, and the chemical industry. It is added as fuel in the chlorination process of high-titanium slag molten salt.

[0003] Titanium is a valuable and strategically important metal, boasting a range of unparalleled properties, including high specific strength, lightweight, corrosion resistance, shape memory, excellent ductility and biocompatibility, superconductivity, and strong surface decorative properties. It is widely used in a wide range of fields, including aerospace, petrochemicals, construction, power generation, healthcare, and sporting goods. Titanium is known as the "third metal" after iron and aluminum. TiO2 is the best white inorganic pigment and is widely used in coatings, plastics, chemical fibers, rubber, papermaking, printing inks, and cosmetics. TiCl4 is the primary intermediate raw material for the production of titanium metal and titanium dioxide, playing a central role in the titanium industry chain. The main industrially valuable titanium-containing minerals in nature are ilmenite and rutile. Industrially, these titanium resources, such as ilmenite and rutile, are primarily used to produce titanium metal and titanium dioxide products. Titanium concentrates are smelted in electric furnaces to produce high-titanium slag, which is then chlorinated to produce TiCl4. The resulting slag is then subjected to magnesium-thermal reduction and distillation to produce titanium sponge, or directly subjected to vapor-phase oxidation and post-processing to produce titanium dioxide chloride. The industrial production process of titanium dioxide and titanium metal is as follows: Figure 2 shown.

[0004] The molten salt chlorination method is mainly used to produce TiCl4, which is mainly used to process titanium raw materials with high calcium and magnesium impurity content. It is characterized by suspending titanium slag and petroleum coke in a molten salt medium (mainly composed of NaCl, KCl, FeCl2, MgCl2, and CaCl2) and reacting with Cl2 to produce TiCl4. The specific process flow is shown in Figure 3 This process was introduced to China from Ukraine in the 1990s. It successfully achieved industrialized production of crude TiCl4 by carbon thermal chlorination of low-grade, high-calcium-magnesium titanium slag with a TiO2 content of 78% to 85% in a NaCl-based molten salt system. The chlorination rate of titanium oxide is >92%, solving the practical production problems of large-scale chlorination equipment and capacity expansion.

[0005] Titanium slag produced from ilmenite concentrate from vanadium-titanium magnetite contains multiple metal oxides, a low TiO2 content (72-75%), high calcium and magnesium impurities (CaO + MgO: 7-8.5%), and a relatively high FeO content (7.5-10%). Average SiO2, Al2O3, and MnO contents are 4.69%, 1.81%, and 1.08%, respectively. The chlorination process produces a large amount of slag and dust collection. Statistics show that for every ton of TiCl4 produced, approximately 1.6 tons of molten salt chloride slag are generated. This molten salt chloride slag contains a large amount of insoluble matter, such as artificial silicates and titanium-containing artificial minerals, as well as a large amount of unburned organic matter (petroleum coke or calcined coke), resulting in a significant waste of resources. Currently, molten salt chloride slag is primarily disposed of by stockpiling and landfilling. This occupies a significant amount of land resources, poses certain environmental risks, and carries high storage costs, limiting the large-scale application of molten salt chlorination methods for high-calcium-magnesium ilmenite concentrate. Summary of the Invention

[0006] To address the comprehensive utilization of molten salt chloride slag from high-calcium-magnesium titanium concentrate from vanadium-titanium magnetite, a method for comprehensively utilizing the fixed carbon and titanium resources in the molten salt chloride slag from high-calcium-magnesium titanium concentrate from vanadium-titanium magnetite has been developed. This method significantly enriches titanium-containing minerals and organic matter in the molten salt chloride slag from high-calcium-magnesium titanium concentrate from vanadium-titanium magnetite, laying the foundation for further economic utilization. This method has the advantages of relatively low utilization cost and easy industrialization. It can be widely applied to the comprehensive utilization of molten salt chloride slag from high-calcium-magnesium titanium concentrate from vanadium-titanium magnetite, and has great practical and promotional value.

[0007] A method for comprehensively recovering fixed carbon and titanium resources from molten salt chloride slag comprises the following steps:

[0008] S1: mixing vanadium-titanium magnetite ilmenite molten salt chloride slag with water, stirring at high speed to obtain raw ore slurry, with a stirring speed of 2000-4000 rad / min and a slurry concentration of 30-50%;

[0009] S2 sieves the raw ore pulp obtained in S1, with a sieve hole diameter of 0.5 to 1.5 mm;

[0010] S3 grinds the oversize product obtained in S2, and the ground product returns to S2 for repeated screening operation;

[0011] S4: Add 400 g / t (based on the dry weight of the original ore) of light diesel and 150 g / t (based on the dry weight of the original ore) of polyethylene glycol to the undersize product obtained in S2 for rough organic carbon flotation separation at a stirring speed of 1590-1992 r / min, a stirring time of 1-3 min, and an aeration and scraping time of 4-8 min;

[0012] In S5, 100 g / t of light diesel oil (based on the weight of the original ore dry ore) and 50 g / t of polyethylene glycol (based on the weight of the original ore dry ore) are added to the slurry at the bottom of the tank after scraping in S4 to carry out organic carbon flotation and scavenging. The stirring speed is 1590-1992 r / min, the stirring time is 1-3 min, and the aeration and scraping time is 2-5 min.

[0013] S6 mixes the foam scraped out by S4 and S5 and then grinds the ore; the grinding fineness is -325 mesh, accounting for 80-95%;

[0014] In step S7, water is added to the ore product ground in step S6 to adjust the slurry concentration to 30-50%, and 100 g / t of water glass with a modulus of 3.2 (based on the weight of the original ore) is added, followed by stirring and slurrying for 1-3 minutes at a stirring speed of 1590-1992 r / min.

[0015] S8 adds 50 g / t (based on the weight of the original ore dry ore) of light diesel and 30 g / t (based on the weight of the original ore dry ore) of polyethylene glycol to the slurry of S7 to carry out organic carbon flotation concentration 1, with a stirring speed of 1590-1992 r / min, a stirring time of 1-3 min, an aeration and scraping time of 2-5 min, and the slurry at the bottom of the tank is returned to S4;

[0016] S9: add water to the foam scraped out in S8 to adjust the pulp concentration to 25-35%, add 40g / t of water glass with a modulus of 3.2 (based on the weight of the original ore), and stir and slurry for 1-3 minutes at a stirring speed of 1590-1992r / min;

[0017] S10 aerates and scrapes foam in S9 for 2 to 5 minutes. The foam scraped out is organic carbon concentrate, and the pulp at the bottom of the tank returns to S8.

[0018] S11 screens the bottom of the S5 tank with a sieve hole diameter of 0.074 mm to 0.15 mm, and the product on the sieve is used as titanium concentrate 1;

[0019] S12: Adjust the pulp concentration of the undersize product in S11 to 30-50%, add 600g / t of reagent A (for dry ore), and stir for 2-4 minutes at a stirring speed of 1590-1992r / min;

[0020] S13: Add 1200g / t of oleic acid (for dry ore) to the S12 pulp for titanium flotation roughing, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, and an aeration and scraping time of 4-8min;

[0021] S14 adds oleic acid 400g / t (for dry ore) to the ore pulp at the bottom of S13 tank to carry out titanium flotation scavenging 1, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, an aeration and scraping time of 3-5min, and the scraped scavenging foam 1 is returned to S12;

[0022] S15 adds oleic acid 300g / t (for dry ore) to the slurry at the bottom of S14 to carry out titanium flotation scavenging 2, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, and an aeration and scraping time of 2-4min. The scraped scavenging foam 2 is returned to S14, and the slurry at the bottom of the tank is the tailings;

[0023] S16 adjusts the flotation foam scraped out in S13 to a pulp concentration of 25-30%, adds 100 g / t of reagent A (for dry ore), and then stirs and adjusts the pulp for 2-4 minutes at a stirring speed of 1590-1992 r / min. The aeration and foam scraping time is 3-6 minutes, and the pulp at the bottom of the tank returns to S12;

[0024] S17 adjusts the flotation foam scraped out in S16 to a pulp concentration of 25-30%, adds 50 g / t of reagent A (for dry ore), and then stirs and adjusts the pulp for 2-4 minutes at a stirring speed of 1590-1992 r / min. The aeration and foam scraping time is 3-6 minutes, and the pulp at the bottom of the tank returns to S16;

[0025] In step S18, the flotation foam scraped out in step S17 is adjusted to a pulp concentration of 25-30%, and 50 g / t of reagent A (for dry ore) is added. The pulp is then stirred for 2-4 minutes at a stirring speed of 1590-1992 r / min and aerated for 3-6 minutes. The pulp at the bottom of the tank is returned to step S17, and the scraped foam is titanium concentrate 2.

[0026] S19 combines titanium concentrate 1 and titanium concentrate 2 into total titanium concentrate.

[0027] Furthermore, the preparation method of the drug A is as follows: ① The raw materials include: H2SO4 with a concentration of 98%, water glass with a modulus of 3.2 and a concentration of 40%, tannic acid, tannin, and deionized water. ② The above five raw materials are mixed in a mass ratio of H2SO4: water glass: tannic acid: tannin: deionized water = 5:5:2.5:2.5:85; wherein the water glass is based on the dry weight of sodium silicate. ③ The mixed drug is subjected to high-speed ultrasonic stirring at a frequency of 26 kHz and a rotation speed of 3000 rpm for emulsification for 15 minutes.

[0028] Furthermore, the dosage of the reagents in S1 to S18 is a dosage ratio relative to the dry weight of the original ore (molten salt chloride slag).

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The process of pre-screening, coarse grinding, flotation to pre-enrich organic carbon, re-grinding and flotation of the organic coarse concentrate to select the organic carbon concentrate, screening the coarse particles of the floating carbon tailings as titanium concentrate 1, and flotation to recover the fine titanium concentrate 2, recovers fixed carbon and titanium resources, achieving significant enrichment of fixed carbon and TiO2, laying the foundation for further economic utilization of the molten salt chloride slag of vanadium titano-magnetite ilmenite concentrate. This method enables the fixed carbon to be used as fuel, and the titanium concentrate product can be used alone, added to titanium concentrate electric furnace smelting operations, or used as a raw material for sulfuric acid titanium dioxide, achieving high-value comprehensive utilization of solid waste. It has the advantages of relatively low process costs and easy industrialization. It can be widely applied to the comprehensive utilization of vanadium titano-magnetite high-calcium magnesium titanium concentrate molten salt chloride slag, and has great practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a process flow chart of an experiment on recovering fixed carbon and titanium resources from vanadium-titanium magnetite ilmenite concentrate molten salt chlorination tailings in an embodiment;

[0032] Figure 2 This is a process flow chart for the industrial production of titanium dioxide and titanium metal;

[0033] Figure 3 This is the process flow chart of titanium slag molten salt chlorination process. DETAILED DESCRIPTION

[0034] The present invention is further described below with reference to specific examples, but is not intended to limit the present invention in any way. To avoid redundancy, the raw materials in the following examples are all commercially available unless otherwise specified; and the methods used are all conventional methods unless otherwise specified.

[0035] Example

[0036] The raw ore sample of vanadium-titanium magnetite ilmenite concentrate molten salt chloride tailings contains: fixed C14.30%, Fe2O37%, SiO231.03%, CaO 5.45%, MgO 4.28%, Al2O3 12.88%, TiO2 20.35%, Mn1.10%, Cl 0.23%, Na2O 0.62%, -0.074mm accounts for 60.09% of the sample. The sample belongs to the molten salt chloride slag obtained by smelting and chlorinating the high titanium slag after smelting the vanadium titanium magnetite ilmenite concentrate in an electric furnace. The insoluble matter after the molten salt chloride slag is treated with water has fine particle size, heavy mud, and serious adhesion between the powder particles and organic matter; artificial pyroxene accounts for 49.93% of the sample, artificial rutile accounts for 20.70%, organic matter accounts for 15.00%, artificial iron-containing rutile accounts for 4.84%, aluminum titanate accounts for 4.90%, and the amount of other minerals is very small; under the electron microscope, the mineral particle size is uneven, showing a microcrystalline-honeycomb-amorphous-structure, the minerals are embedded in a fine particle size, and encapsulation and cementation are common.

[0037] A method for comprehensively recovering fixed carbon and titanium resources from molten salt chloride slag, wherein the experimental process of an embodiment of the method comprises the following steps:

[0038] S1: The mixed vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag is manually added into the XTJ-II leaching mixer, water is added to adjust the slurry concentration to 40%, the stirring speed is 3000 rad / min, and the stirring is carried out for 10 minutes.

[0039] S2 feeds the raw ore pulp obtained in S1 into a KM-800-4s rotary vibrating screen for screening, with a screen hole diameter of 1.0 mm;

[0040] S3 adjusts the pulp concentration of the oversize product obtained in S2 to 60%, feeds it into the XMB-ф200×240 rod mill and grinds it to -1mm. The ground product returns to S2 and repeats the screening operation;

[0041] S4 feeds the undersize product obtained in S2 into an XFD IV-8 single-tank flotation cell. Water is added to the cell's scale (pulp concentration 30-40%). The stirring device is turned on for rough organic carbon flotation separation, adjusting the stirring speed to 1800 r / min. 400 g / t (based on the dry weight of the original ore) of light diesel and 150 g / t (based on the dry weight of the original ore) of polyethylene glycol are added, and stirring is continued for 2 minutes. The flotation cell's aeration device is turned on until the foam layer rises to the height of the flotation cell's overflow weir. The scraper device is then turned on to begin scraping foam for 6 minutes. Once scraping is complete, the scraper and aeration device are turned off.

[0042] In step S5, 100 g / t of light diesel oil (based on the dry weight of the original ore) and 50 g / t of polyethylene glycol (based on the dry weight of the original ore) are added to the slurry at the bottom of the tank after scraping in step S4 to carry out organic carbon flotation scavenging. The stirring speed is 1800 r / min and the stirring time is 2 min. The aeration device of the flotation machine is turned on until the foam layer rises to the height of the overflow weir of the flotation machine. The scraper device is turned on to start scraping. The aeration and scraping time is 4 min. After the scraping is completed, the scraping and aeration device are turned off.

[0043] S6 mixes the foam scraped from S4 and S5 and puts it into XMQ-ф240×90 ball mill, adjusts the slurry concentration to 60% for grinding, and grinds the ore to a fineness of -325 mesh, accounting for 93%;

[0044] S7: Place the ore product from S6 in a XFDⅣ-1.5 single-tank flotation machine, add water to adjust the pulp concentration to 30-50%, add 100g / t of water glass with a modulus of 3.2 (for dry ore), and continue stirring and slurrying for 3 minutes. Turn on the stirring device and adjust the stirring speed to 1600r / min.

[0045] In step S8, 50 g / t of light diesel oil (for dry ore) and 30 g / t of polyethylene glycol (for dry ore) are added to the slurry of step S7 to carry out organic carbon flotation separation 1. The mixture is stirred for 2 minutes. The aeration device of the flotation machine is turned on until the foam layer rises to the height of the overflow weir of the flotation machine. The scraper device is turned on to start scraping foam for 4 minutes. After the scraping is completed, the scraper and the aeration device are turned off, and the slurry at the bottom of the tank is returned to step S4.

[0046] In step S9, the foam product scraped out in step S8 is placed in an XFD IV-1.5 single-tank flotation machine, water is added to adjust the pulp concentration to 25-35%, 40 g / t of water glass with a modulus of 3.2 (for dry ore) is added, and the pulp is continuously stirred for 3 minutes. The stirring device is turned on and the stirring speed is adjusted to 1600 r / min.

[0047] In S10, aeration and foam scraping are carried out in S9, and the aeration device of the flotation machine is turned on until the foam layer rises to the height of the overflow weir of the flotation machine. The scraper device is turned on to start foam scraping. The foam scraping time is 4 minutes. After the foam scraping is completed, the foam scraping and aeration device are turned off. The slurry at the bottom of the tank returns to S8, and the foam product is used as organic carbon concentrate (organic concentrate);

[0048] S11 feeds the pulp from the bottom of the S5 middle tank into a WH-Ⅱ high-frequency vibrating screen for screening. The screen hole diameter is 0.10 mm, and the product on the screen is used as titanium concentrate 1.

[0049] In step S12, the undersize product in step S11 is placed in a XFD IV-3.0 single-tank flotation machine. Water is added to adjust the scale line (the pulp concentration is 30-50%). 600 g / t of reagent A (based on the weight of the dry ore) is added and stirred for 3 minutes. The stirring device of the flotation machine is turned on and the stirring speed is adjusted to 1800 r / min.

[0050] Preparation method of Agent A: ① The raw materials include: H2SO4 at a concentration of 98%, water glass with a modulus of 3.2 and a concentration of 40%, tannic acid, tannin, and deionized water. ② The five raw materials are mixed in a mass ratio of H2SO4: water glass: tannic acid: tannin: deionized water = 5:5:2.5:2.5:85; the water glass is based on the dry weight of sodium silicate. ③ The mixed agent is subjected to high-speed ultrasonic stirring at a frequency of 26 kHz and a rotation speed of 3000 rpm for emulsification for 15 minutes.

[0051] In step S13, 1200 g / t of oleic acid (based on the dry weight of the original ore) is added to the slurry of step S12 to perform titanium flotation roughing, with a stirring speed of 1800 r / min and a stirring time of 3 min. The aeration device of the flotation machine is turned on until the foam layer rises to the height of the flotation machine overflow weir, and the scraper device is turned on to start scraping foam, with an aeration and scraping time of 6 min. After the scraping is completed, the scraping and aeration device are turned off.

[0052] In step S14, 400 g / t of oleic acid (based on the dry weight of the original ore) is added to the pulp at the bottom of the tank in step S13 to perform titanium flotation scavenging 1, with a stirring speed of 1800 r / min and a stirring time of 3 minutes. The aeration device of the flotation machine is turned on until the foam layer rises to the height of the flotation machine overflow weir, and the scraper device is turned on to start scraping foam. The aeration and scraping time is 4 minutes. After the scraping is completed, the scraping and aeration device are turned off, and the scraped scavenging foam is returned to step S12.

[0053] In step S15, 300 g / t of oleic acid (based on the dry weight of the original ore) is added to the slurry at the bottom of the flotation cell in step S14 to perform titanium flotation scavenging 2, with a stirring speed of 1600 r / min and continuous stirring for 3 minutes. The aeration device of the flotation cell is turned on until the foam layer rises to the height of the flotation cell overflow weir, and the scraper device is turned on to start scraping foam for 3 minutes. After the scraping is completed, the scraper and the aeration device are turned off, and the scraped scavenging foam 2 is returned to step S14, and the slurry at the bottom of the cell is the tailings.

[0054] In step S16, the flotation foam scraped out in step S13 is placed in an XFD IV-1.0 single-tank flotation machine, water is added to adjust the scale line (pulp concentration 25-30%), the flotation machine stirring device is turned on and the stirring speed is adjusted to 1600 r / min; after adding 100 g / t of reagent A (for dry ore), stirring is continued for 3 minutes, the flotation machine aeration device is turned on until the foam layer rises to the height of the flotation machine overflow weir, the scraper device is turned on to start scraping the foam, and the scraping time is 5 minutes. After the scraping is completed, the scraping and aeration devices are turned off, and the slurry at the bottom of the tank returns to step S12;

[0055] In step S17, the flotation foam scraped out in step S16 is adjusted to a pulp concentration of 25-30%, and 50 g / t of reagent A (for dry ore) is added. The pulp is then stirred for 3 minutes, and the aeration device of the flotation machine is turned on until the foam layer rises to the height of the flotation machine overflow weir. The scraper device is turned on to start scraping the foam for 4 minutes. After the scraping is completed, the scraper and the aeration device are turned off, and the pulp at the bottom of the tank returns to step S16.

[0056] In step S18, the flotation froth scraped from step S17 is placed in an XFD IV-0.75 single-tank flotation cell. Water is added to adjust the scale (pulp concentration 25-30%). The flotation cell stirring device is turned on and the stirring speed is adjusted to 1600 r / min. 50 g / t of reagent A (based on the dry weight of the original ore) is added and the slurry is stirred for 3 minutes. The flotation cell aeration device is turned on until the foam layer rises to the height of the flotation cell overflow weir. The scraper device is turned on to begin scraping the flotation froth for 4 minutes. After the scraping is completed, the scraper and aeration device are turned off. The slurry at the bottom of the tank is returned to step S17. The scraped froth is titanium concentrate 2. The amount of reagent used in steps S1 to S18 is the ratio of the amount used to the dry weight of the original ore (molten salt chloride slag).

[0057] S19 combines titanium concentrate 1 and titanium concentrate 2 into total titanium concentrate.

[0058] The results show that the tailings of vanadium titano-magnetite ilmenite concentrate molten salt chloride slag water treatment in the example adopt the above equipment and process flow, Figure 1 The separation conditions and process parameters in the experiment yielded a titanium concentrate with a yield of 24.61%, a TiO2 grade of 71.37%, and a TiO2 recovery of 86.31%, and an organic concentrate with a yield of 13.89%, a fixed carbon grade of 94.64%, and a fixed carbon recovery of 91.93%. The test results are shown in Table 1, the main chemical composition analysis results of the titanium concentrate are shown in Table 2, and the main chemical composition analysis results of the organic concentrate are shown in Table 3.

[0059] Table 1 Pilot results of recovering fixed carbon and titanium resources from molten salt chloride slag of vanadium-titanium magnetite titanium concentrate

[0060]

[0061] Table 2 Analysis results of main chemical components of titanium concentrate / %

[0062]

[0063] Table 3 Analysis results of main chemical components of organic carbon concentrate / %

[0064]

[0065] Anyone skilled in the art will be able to utilize the above-disclosed technical content to make many possible changes and modifications to the technical solution of the present invention, or to modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for comprehensively recovering fixed carbon and titanium resources from molten salt chloride slag, characterized in that: The method comprises the following steps: S1: mixing vanadium-titanium magnetite ilmenite molten salt chloride slag with water and stirring evenly to obtain raw ore slurry at a stirring speed of 2000-4000 rad / min and a slurry concentration of 30-50%; S2 sieves the raw ore pulp obtained in S1, with a sieve hole diameter of 0.5 to 1.5 mm; S3 grinds the oversize product obtained in S2, and the ground product returns to S2 for repeated screening operation; S4: Add 400 g / t of light diesel and 150 g / t of polyethylene glycol to the undersize product obtained in S2 for rough organic carbon flotation separation. The stirring speed is 1590-1992 r / min, the stirring time is 1-3 min, and the aeration and scraping time is 4-8 min. S5: Add 100g / t of light diesel oil and 50g / t of polyethylene glycol to the slurry remaining at the bottom of the tank after scraping in S4, and perform organic carbon flotation and scavenging. The stirring speed is 1590-1992r / min, the stirring time is 1-3min, and the aeration and scraping time is 2-5min. S6 mixes the foam scraped out by S4 and S5 and then grinds the ore; the grinding fineness is -325 mesh, accounting for 80-95%; In step S7, water is added to the ore product ground in step S6 to adjust the pulp concentration to 30-50%, and 100 g / t of water glass with a modulus of 3.2 is added, followed by stirring for 1-3 minutes at a stirring speed of 1590-1992 r / min. S8 adds 50g / t of light diesel and 30g / t of polyethylene glycol to the pulp of S7 to carry out organic carbon flotation selection 1, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, an aeration and scraping time of 2-5min, and the pulp at the bottom of the tank is returned to S4; S9: add water to the foam scraped out in S8 to adjust the pulp concentration to 25-35%, add 40g / t of water glass with a modulus of 3.2, and stir the pulp for 1-3 minutes at a stirring speed of 1590-1992r / min; S10 aerates and scrapes foam in S9 for 2 to 5 minutes. The foam scraped out is organic carbon concentrate, and the pulp at the bottom of the tank returns to S8. S11 screens the bottom of the S5 tank with a sieve hole diameter of 0.074 mm to 0.15 mm, and the product on the sieve is used as titanium concentrate 1; S12: Adjust the pulp concentration of the undersize product in S11 to 30-50%, add 600g / t of reagent A, and stir for 2-4 minutes at a stirring speed of 1590-1992r / min; S13: Add 1200g / t of oleic acid to the S12 pulp for titanium flotation roughing, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, and an aeration and scraping time of 4-8min; S14) adding oleic acid 400g / t to the pulp at the bottom of the S13 tank to carry out titanium flotation scavenging 1, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, an aeration and scraping time of 3-5min, and the scraped scavenging foam 1 is returned to S12; S15 adds oleic acid 300g / t to the pulp at the bottom of S14 to carry out titanium flotation scavenging 2, with a stirring speed of 1590-1992r / min, a stirring time of 1-3min, and an aeration and scraping time of 2-4min. The scraped scavenging foam 2 is returned to S14, and the pulp at the bottom of the tank is the tailings; S16 adjusts the flotation foam scraped out in S13 to a pulp concentration of 25-30%, adds 100 g / t of reagent A, and stirs and adjusts the pulp for 2-4 minutes at a stirring speed of 1590-1992 r / min. The aeration and foam scraping time is 3-6 minutes, and the pulp at the bottom of the tank is returned to S12; S17 adjusts the flotation foam scraped out in S16 to a pulp concentration of 25-30%, adds 50 g / t of reagent A, and stirs and adjusts the pulp for 2-4 minutes at a stirring speed of 1590-1992 r / min. The aeration and foam scraping time is 3-6 minutes, and the pulp at the bottom of the tank is returned to S16; S18 adjusts the flotation foam scraped out in S17 to a pulp concentration of 25-30%, adds 50 g / t of reagent A, and stirs the pulp for 2-4 minutes at a stirring speed of 1590-1992 r / min. The aeration and foam scraping time is 3-6 minutes. The pulp at the bottom of the tank is returned to S17, and the scraped foam is titanium concentrate 2; S19 combines titanium concentrate 1 and titanium concentrate 2 into total titanium concentrate.

2. The method according to claim 1, characterized in that The preparation method of the agent A is as follows: ① the raw materials include: H2SO4 with a concentration of 98%, water glass with a modulus of 3.2 and a concentration of 40%, tannic acid, tannin, and deionized water; ② the above five raw materials are mixed in a mass ratio of H2SO4: water glass: tannic acid: tannin: deionized water = 5:5:2.5:2.5:85; wherein the water glass is the dry basis mass of sodium silicate; ③ the mixed agent is placed in an ultrasonic high-speed stirring with a frequency of 26KHZ and a rotation speed of 3000r / min, and emulsified for 15 minutes.

3. The method according to claim 1, characterized in that The dosage of the reagents in S1 to S18 is the dosage ratio relative to the weight of the molten salt chloride slag dry ore.

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