A method for comprehensive utilization of TiO2 in molten salt chloride slag

Abstract

The present invention discloses a method for comprehensively utilizing TiO2 in molten salt chloride slag, adopts slag separation ‑ pre-screening classification ‑ coarse particle flotation ‑ fine particle classification gravity separation process to obtain a titanium concentrate product with high TiO2 content, achieves the effect of significant enrichment of TiO2, enables it to be used alone as a titanium concentrate product, added into a titanium concentrate electric furnace smelting operation or as a sulfuric acid process titanium dioxide raw material, realizes high-value resource utilization of solid waste; overcomes the defects of currently taking storage or landfill mode for processing of molten salt chloride slag, which will occupy a large amount of land resources and has environmental risks, and lays the foundation for the further comprehensive utilization of vanadium titanium magnetite ilmenite concentrate molten salt chloride slag. The method has the advantages of relatively low process cost and easy industrialization, can be widely used in the field of comprehensive utilization 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 utilizing TiO2 in the molten salt chlorination tailings. Background Art

[0002] Titanium is a valuable and strategically important metal, boasting a range of unparalleled properties, including high specific strength, light weight, 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, electricity, 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 metallic titanium 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. By the end of 2018, approximately 93.42% of the world's titanium resources (measured in TiO2) were in the form of ilmenite. my country's titanium resources accounted for 25% of the world's total, 93% of which were found in the vanadium-titanium magnetite deposits in the Panxi region. The ilmenite concentrate recovered from the Panxi vanadium-titanium magnetite deposits is characterized by high iron content, calcium content, and magnesium content. Industrially, titanium resources such as ilmenite and rutile are mainly used to produce titanium metal and titanium dioxide products. The utilization path is to smelt the titanium-containing concentrate in an electric furnace to obtain high-titanium slag, which is further chlorinated to produce TiCl4. The obtained slag is then subjected to magnesium thermal reduction and distillation to produce sponge titanium metal or directly used for gas phase oxidation and post-processing to obtain chloride titanium dioxide products. The industrial production process of titanium dioxide and titanium metal is as follows: Figure 2 shown.

[0003] Molten salt chlorination method is widely used to produce TiCl4. This method 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, CaCl2) and reacting with Cl2 to produce TiCl4. The specific process flow is shown in Figure 3 This process has 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.

[0004] 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

[0005] To address the comprehensive utilization of molten salt chloride slag from high-calcium-magnesium titanium concentrate from vanadium-titanium magnetite, a method for the comprehensive utilization of TiO2 in molten salt chloride slag from vanadium-titanium magnetite, high-calcium-magnesium titanium concentrate, is provided. This method significantly enriches titanium-containing minerals in the molten salt chloride slag 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.

[0006] A method for comprehensively utilizing TiO2 in molten salt chloride slag comprises the following steps:

[0007] S1: adding the mixed vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag into a 30-40L ore bin, and feeding the vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag into a mixing barrel 1 through a pendulum feeder for stirring, scrubbing and slurrying, and adjusting the feeding speed to 90-110kg / h;

[0008] S2 Mixing and slurry preparation 1: Use a 100L mixing barrel 1 with a circulation hole to add water to a mass concentration of 30-40%, add water at a rate of 150-200L / h, and stir at a rate of 200rad / min. The stirred slurry flows by gravity into the slag separation operation;

[0009] S3 slag separation: A rotary vibrating screen with a mesh diameter of 1.0 mm is used for slag separation. The product above the screen is fed into the PY-1 sedimentation tank, and the product below the screen is fed into the rotary vibrating screen via a vertical sand pump 1 for the first screening and grading;

[0010] S4: First screening and grading: The sieve hole diameter is 0.125-0.25 mm. The product on the sieve is transported to the mixing tank 2 by the vertical sand pump 2, and the product under the sieve is pumped to the second screening and grading by the vertical sand pump 3;

[0011] S5 stirring slurry 2: add light diesel oil into stirring barrel 2, the amount of light diesel oil is 165g / t (relative to the mass of molten salt chloride slag), the flow rate is 0.25-0.30mL / min, the stirring speed is 800rad / min, and the slurry in stirring barrel 2 flows into stirring barrel 3 by gravity;

[0012] S6 stirring and slurry preparation 3: add 2# oil into the stirring barrel 3, the amount of the 2# oil is 75g / t (relative to the mass of the molten salt chloride slag), the flow rate is 0.10-0.15mL / min, the stirring speed is 900rad / min, and the slurry in the stirring barrel 3 flows into the flotation column for the first flotation;

[0013] S7 1st flotation: Control the thickness of the flotation column foam layer to 60-80mm, the inflation volume to 2.5-3.0L / min, the flotation foam is fed into the vertical sand pump 4 and transported to the PY-1 sedimentation tank, and the flotation underflow is fed into the vertical sand pump 5, which pumps the slurry into the PY-2 sedimentation tank;

[0014] S8 Second screening and classification: The screening equipment is a rotary vibrating screen with ultrasonic waves, the mesh diameter is 0.068-0.076mm, the ultrasonic frequency is 20-38KHz, the product on the screen is pumped by the vertical sand pump 6 to the first shaking table for gravity selection, and the product under the screen is pumped by the vertical sand pump 7 to the third classification;

[0015] S9 1st shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 3°~5°, a stroke of 11~14mm, a flushing frequency of 350~370 times / min, a feed concentration of 20~25%, and a horizontal flushing water of 8~10L / min. Heavy minerals are fed into the vertical sand pump 8 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the concentration device by the vertical sand pump 9;

[0016] S10 Concentration 1: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 20-25%, and is pumped to the second shaking table gravity separation through the vertical sand pump 10;

[0017] S11 second shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 2°~4°, a stroke of 11~14mm, a flushing frequency of 350~370 times / min, an ore feed concentration of 20%~25%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 11 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the PY-1 sedimentation tank by the vertical sand pump 12;

[0018] S12 3rd classification: The screening equipment is an ultrasonic rotary vibrating screen with a sieve hole diameter of 0.036-0.043mm and an ultrasonic frequency of 20-38KHz. The product on the screen is pumped to the 3rd shaking table for gravity selection by a vertical sand pump 13, and the product under the screen is pumped to the PY-1 sedimentation tank by a vertical sand pump 14;

[0019] S13 3rd shaking table gravity separation: The equipment is a 2100×1150 ore shaking table with a slope of 2°~4°, a stroke of 5~7mm, a stroke rate of 480~520 times / min, an ore feed concentration of 15%~20%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 15 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the concentration device by the vertical sand pump 16;

[0020] S14 Concentration 2: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 15-20%, and is pumped to the fourth shaking table gravity separation by the vertical sand pump 17;

[0021] S15 4th shaking table gravity separation: The equipment is a 2100×1150 ore shaking table with a slope of 2°~4°, a stroke of 5~7mm, a stroke rate of 480~520 times / min, an ore feed concentration of 15%~20%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 18 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the PY-1 sedimentation tank by the vertical sand pump 19;

[0022] The product in the S16 PY-1 sedimentation tank is tailings, and the product in the PY-2 sedimentation tank is titanium concentrate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] A titanium concentrate product with a high TiO2 content is obtained by using a slag separation-pre-screening and classification-coarse particle flotation-fine particle classification and gravity separation process. This achieves a significant enrichment of TiO2, allowing it to be used alone as a titanium concentrate product, added to titanium concentrate electric furnace smelting operations, or used as a raw material for sulfuric acid titanium dioxide, realizing high-value resource utilization of solid waste. This overcomes the current shortcomings of molten salt chloride slag, which is currently treated by storage or landfill, occupying a large amount of land resources and posing environmental risks. This method lays the foundation for the further comprehensive utilization of molten salt chloride slag from vanadium-titanium magnetite ilmenite concentrate. This method has the advantages of relatively low process cost and easy industrialization. It can be widely used in the comprehensive utilization of molten salt chloride slag from vanadium-titanium magnetite high-calcium-magnesium titanium concentrate, and has great practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A pilot process flow chart for the comprehensive utilization of TiO2 in molten salt chloride slag according to an embodiment;

[0026] Figure 2This is a process flow chart for the industrial production of titanium dioxide and titanium metal;

[0027] Figure 3 This is the process flow chart of titanium slag molten salt chlorination process. DETAILED DESCRIPTION

[0028] 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.

[0029] Example

[0030] The scale of the embodiment is a laboratory-scale continuous pilot test with a raw ore processing capacity of 100 kg / h. The molten salt chloride tailings (raw ore) sample of vanadium-titanium magnetite ilmenite concentrate contains: fixed C14.30%, Fe2O3 7%, SiO231.03%, CaO5.45%, MgO 4.28%, Al2O3 12.88%, TiO2 20.35%, Mn 1.10%, 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.

[0031] A method for comprehensively utilizing TiO2 in molten salt chloride slag, wherein the pilot test process of an embodiment of the method comprises the following steps:

[0032] S1: The mixed vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag (raw ore) is manually added into a 35L ore bin, and the pendulum feeder feeds the material into a mixing barrel 1 (capacity 100L, with a circulation hole) for stirring, scrubbing and slurry preparation. The feeding rate is adjusted to 100kg / h.

[0033] S2 Mixing and slurry preparation 1: Use a 100L mixing barrel 1 with a circulation hole to add water to a mass concentration of 35%, add water at a rate of 185L / h, and stir at a rate of 200rad / min. The stirred slurry flows by gravity into the KM-800-4s rotary vibrating screen for slag separation.

[0034] S3 slag separation: KM-800-4s rotary vibrating screen is used for slag separation, with a screen hole diameter of 1.0mm. The product above the screen is fed into the PY-1 sedimentation tank, and the product below the screen is fed into the KM-800-4s rotary vibrating screen by XBSL1 / 2 vertical sand pump 1 for the first screening and grading;

[0035] S4: First screening and grading: The sieve hole diameter is 0.15mm. The product on the sieve is transported to the mixing tank 2 (model XTD-15L, with circulation holes) by the XBSL1 / 2 vertical sand pump 2. The product under the sieve is pumped to the second screening and grading by the XBSL1 / 2 vertical sand pump 3.

[0036] S5 stirring slurry 2: add light diesel oil into stirring barrel 2, the amount of light diesel oil is 165g / t (relative to the mass of molten salt chloride slag), the flow rate is 0.275mL / min, the stirring speed is 800rad / min, and the slurry in stirring barrel 2 flows into stirring barrel 3 (model XTD-30L, with circulation hole) by gravity;

[0037] S6 stirring slurry 3: add 2# oil into the stirring barrel 3, the amount of the 2# oil is 75g / t (relative to the mass of the molten salt chloride slag), the flow rate is 0.125mL / min, the stirring speed is 900rad / min, and the slurry in the stirring barrel 3 flows into the flotation column for the first flotation;

[0038] S7 1st flotation: The flotation equipment is ZGSYF-80 flotation column, with a foam layer thickness of 60-80mm and an aeration rate of 2.5-3.0L / min. The flotation foam is fed into XBSL1 / 4 vertical sand pump 4 and transported to PY-1 sedimentation tank. The flotation underflow is fed into XBSL1 / 2 vertical sand pump 5, which pumps the slurry into PY-2 sedimentation tank.

[0039] S8 Second screening and classification: The screening equipment is KM-800-4s rotary vibrating screen (with ultrasonic wave), the screen hole diameter is 0.074mm, the ultrasonic frequency is 32KHz, the above-screen product is pumped to the first shaking table for gravity selection by XBSL1 / 4 vertical sand pump 6, and the under-screen product is pumped to the third classification by XBSL1 / 2 vertical sand pump 7;

[0040] S9 1st shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 4°, a stroke of 13mm, a stroke of 360 times / min, a feed concentration of 23%, and a horizontal flushing water of 9L / min. Heavy minerals are fed into the PY-2 sedimentation tank by an XBSL1 / 4 vertical sand pump 8, and light minerals are pumped into the concentrator by an XBSL1 / 2 vertical sand pump 9;

[0041] S10 Concentration 1: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 23%. It is pumped to the second shaking table gravity separation by the XBSL1 / 4 vertical sand pump 10;

[0042] S11 second shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 3°, a stroke of 13mm, a flushing frequency of 360 times / min, a feed concentration of 23%, and a horizontal flushing water of 7L / min. Heavy minerals are fed into the PY-2 sedimentation tank by an XBSL1 / 4 vertical sand pump 11, and light minerals are pumped into the PY-1 sedimentation tank by an XBSL1 / 2 vertical sand pump 12;

[0043] S12 3rd classification: The screening equipment is KM-800-4s rotary vibrating screen (with ultrasonic wave), the screen hole diameter is 0.038mm, the ultrasonic frequency is 26KHz, the oversize product is pumped to the 3rd shaking table gravity selection by XBSL1 / 4 vertical sand pump 13, and the undersize product is pumped to PY-1 sedimentation tank by XBSL1 / 2 vertical sand pump 14;

[0044] S13 3rd shaking table gravity separation: The equipment is a 2100×1150 sludge shaking table with a slope of 2°, a stroke of 6mm, a stroke rate of 500 times / min, a feed concentration of 17%, and a horizontal flushing water of 6L / min. Heavy minerals are fed into the PY-2 sedimentation tank by an XBSL1 / 4 vertical sand pump 15, and light minerals are pumped into the concentrator by an XBSL1 / 2 vertical sand pump 16;

[0045] S14 Concentration 2: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 15%. It is pumped to the 4th shaking table gravity separation through the XBSL1 / 4 vertical sand pump 17;

[0046] S15 4th shaking table gravity separation: The equipment is a 2100×1150 sludge shaking table with a slope of 2°, a stroke of 5mm, a stroke rate of 520 times / min, an ore feed concentration of 15%, and a horizontal flushing water of 6L / min. Heavy minerals are fed into the PY-2 sedimentation tank by an XBSL1 / 4 vertical sand pump 18, and light minerals are pumped into the PY-1 sedimentation tank by an XBSL1 / 2 vertical sand pump 19.

[0047] The product in the S16 PY-1 sedimentation tank is tailings, and the product in the PY-2 sedimentation tank is titanium concentrate.

[0048] 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 flotation reagent conditions and process parameters can obtain titanium concentrate with a yield of 22.35%, a TiO2 grade of 65.36% and a TiO2 recovery rate of 71.78%. The total tailings yield is 77.65%. The analysis results of the main chemical components of the titanium concentrate are shown in Table 1.

[0049] Table 1 Analysis results of main chemical components of titanium concentrate (wt%)

[0050]

[0051] 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 comprehensive utilization of TiO2 in molten salt chloride slag, characterized in that: The method comprises the following steps: S1: adding the mixed vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag into a 30-40L ore bin, and feeding the vanadium-titanium magnetite ilmenite concentrate molten salt chloride slag into a mixing barrel 1 through a pendulum feeder for stirring, scrubbing and slurrying, and adjusting the feeding speed to 90-110kg / h; S2 Mixing and slurry preparation 1: Use a 100L mixing barrel 1 with a circulation hole to add water to a mass concentration of 30-40%, add water at a rate of 150-200L / h, and stir at a rate of 200rad / min. The stirred slurry flows by gravity into the slag separation operation; S3 slag separation: A rotary vibrating screen with a mesh diameter of 1.0 mm is used for slag separation. The product above the screen is fed into the PY-1 sedimentation tank, and the product below the screen is fed into the rotary vibrating screen via a vertical sand pump 1 for the first screening and grading; S4: First screening and grading: The sieve hole diameter is 0.125-0.25 mm. The product on the sieve is transported to the mixing tank 2 by the vertical sand pump 2, and the product under the sieve is pumped to the second screening and grading by the vertical sand pump 3; S5 stirring slurry 2: add light diesel oil into stirring barrel 2, the amount of light diesel oil is 165g / t, the flow rate is 0.25-0.30mL / min, the stirring speed is 800rad / min, and the slurry in stirring barrel 2 flows into stirring barrel 3 by gravity; S6 stirring and slurry preparation 3: add 2# oil into the stirring barrel 3, the amount of the 2# oil is 75g / t, the flow rate is 0.10-0.15mL / min, the stirring speed is 900rad / min, and the slurry in the stirring barrel 3 flows into the flotation column for the first flotation; S7 1st flotation: Control the thickness of the flotation column foam layer to 60-80mm, the inflation volume to 2.5-3.0L / min, the flotation foam is fed into the vertical sand pump 4 and transported to the PY-1 sedimentation tank, and the flotation underflow is fed into the vertical sand pump 5, which pumps the slurry into the PY-2 sedimentation tank; S8 Second screening and classification: The screening equipment is a rotary vibrating screen with ultrasonic waves, the mesh diameter is 0.068-0.076mm, the ultrasonic frequency is 20-38KHz, the product on the screen is pumped by the vertical sand pump 6 to the first shaking table for gravity selection, and the product under the screen is pumped by the vertical sand pump 7 to the third classification; S9 1st shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 3°~5°, a stroke of 11~14mm, a flushing frequency of 350~370 times / min, a feed concentration of 20~25%, and a horizontal flushing water of 8~10L / min. Heavy minerals are fed into the vertical sand pump 8 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the concentration device by the vertical sand pump 9; S10 Concentration 1: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 20-25%, and is pumped to the second shaking table gravity separation through the vertical sand pump 10; S11 second shaking table gravity separation: The equipment is a 2100×1150 fine sand shaking table with a slope of 2°~4°, a stroke of 11~14mm, a flushing frequency of 350~370 times / min, an ore feed concentration of 20~25%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 11 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the PY-1 sedimentation tank by the vertical sand pump 12; S12 3rd classification: The screening equipment is an ultrasonic rotary vibrating screen with a sieve hole diameter of 0.036-0.043mm and an ultrasonic frequency of 20-38KHz. The product on the screen is pumped to the 3rd shaking table for gravity selection by a vertical sand pump 13, and the product under the screen is pumped to the PY-1 sedimentation tank by a vertical sand pump 14; S13 3rd shaking table gravity separation: The equipment is a 2100×1150 ore shaking table with a slope of 2°~4°, a stroke of 5~7mm, a stroke rate of 480~520 times / min, an ore feed concentration of 15~20%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 15 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the concentration device by the vertical sand pump 16; S14 Concentration 2: The concentrated overflow is used as circulating water, and the concentration of the concentrated underflow is controlled at 15-20%, and is pumped to the fourth shaking table gravity separation by the vertical sand pump 17; S15 4th shaking table gravity separation: The equipment is a 2100×1150 ore shaking table with a slope of 2°~4°, a stroke of 5~7mm, a stroke rate of 480~520 times / min, an ore feed concentration of 15~20%, and a horizontal flushing water of 6~8L / min. Heavy minerals are fed into the vertical sand pump 18 and pumped to the PY-2 sedimentation tank, while light minerals are pumped into the PY-1 sedimentation tank by the vertical sand pump 19; The product in the S16 PY-1 sedimentation tank is tailings, and the product in the PY-2 sedimentation tank is titanium concentrate.

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