Method for recovering titanium element in super-low-grade high-intensity magnetic concentrate

Abstract

The present application relates to the technical field of titanium concentrate preparation, and particularly relates to a flotation recovery method of titanium elements in super-low-grade high-intensity magnetic concentrate. The method comprises the following steps: concentrating the high-intensity magnetic concentrate to obtain concentrated concentrate; desulfurizing the concentrated concentrate to obtain desulfurized high-intensity magnetic concentrate; performing first roughing on the desulfurized high-intensity magnetic concentrate to obtain roughing concentrate and first tailings; performing first pre-set number of cleaning on the roughing concentrate to obtain titanium concentrate; and sequentially performing second roughing and second pre-set number of scavenging on the first tailings to obtain titanium flotation tailings. The method solves the problems of high production cost, low titanium recovery efficiency and difficulty in producing qualified titanium concentrate caused by the super-low titanium grade of the high-intensity magnetic concentrate in the prior art. Through roughing, cleaning and scavenging on the high-concentration super-low-titanium-grade high-intensity magnetic concentrate after desulfurization, excellent titanium flotation effect is achieved, titanium elements can be effectively recovered, the titanium flotation operation is easy to control and stable in operation, and the obtained titanium concentrate is qualified and stable in grade.

Description

Technical Field

[0001] This invention relates to the field of titanium concentrate preparation technology, specifically to a flotation recovery method for titanium elements in ultra-low grade strong magnetic concentrate. Background Technology

[0002] Titanium concentrate (mainly ilmenite, FeTiO3) typically contains 40%-60% TiO2 and a large amount of iron and other impurities. Direct use in subsequent processes is inefficient and costly; therefore, it must be pre-enriched to prepare "titanium-rich feedstock." Existing titanium flotation recovery methods have several shortcomings, such as poor desulfurization before flotation, affecting subsequent titanium flotation; insufficient feed slurry volume leading to low titanium recovery efficiency; and, especially when processing strongly magnetic concentrates with extremely low titanium content, the prepared concentrate often fails to meet standards, making it difficult to obtain qualified products. Summary of the Invention

[0003] This invention aims to solve the problem in existing technologies where the titanium grade in strong magnetic concentrate is extremely low (8%-9%), resulting in substandard titanium concentrate grades. Because the flotation grade is only 8%-9%, the prepared titanium concentrate has such low titanium grade that it cannot be used as a product. This invention provides a flotation recovery method for ultra-low grade strong magnetic concentrate titanium elements. This method has high recovery efficiency and good titanium flotation effect, and can efficiently recover qualified titanium concentrate from ultra-low grade strong magnetic concentrate.

[0004] The specific technical solution of the present invention is as follows: In a first aspect, the present invention provides a flotation recovery method for titanium elements in ultra-low grade strong magnetic concentrate, comprising the following steps: The concentrated concentrate is obtained by concentrating the strongly magnetic concentrate. The concentrated concentrate is desulfurized to obtain desulfurized strong magnetic concentrate; The desulfurized strong magnetic concentrate is subjected to the first roughing process to obtain the roughing concentrate and the first tailings. Titanium concentrate is obtained by subjecting the rough concentrate to a first preset number of fine treatments; The first tailings are subjected to a second roughing process and a second preset number of scavenging processes to obtain titanium flotation tailings.

[0005] Furthermore, the titanium grade of the strong magnetic concentrate is 8-9%.

[0006] Furthermore, the first preset number of times is 3 to 6 times.

[0007] Furthermore, the first preset number of times is 5 times.

[0008] Furthermore, the specific operation of the fine selection is as follows: the rough concentrate is finely selected for the first time, the tailings of the first fine selection are returned to the rough concentrate, and the concentrate of the first fine selection is finely selected for the second time. The tailings from the second refining process are returned to the first refining process, and the concentrate from the second refining process is subjected to the third refining process. The tailings from the third fine-tuning are returned to the second fine-tuning, and the concentrate from the third fine-tuning is subjected to the fourth fine-tuning. The tailings from the fourth refinement are returned to the third refinement, and the concentrate from the fourth refinement is subjected to the fifth refinement. The tailings from the fifth refinement were returned to the fourth refinement, and the concentrate from the fifth refinement was titanium concentrate.

[0009] Furthermore, the second preset number of times is 2 times.

[0010] Furthermore, the specific operation of the scavenging is to perform a second roughing on the first tailings to obtain a second roughing concentrate and a second roughing tailings; The tailings from the second roughing process are subjected to the first scavenging process, the concentrate from the first scavenging process is returned to the second roughing process, and the tailings from the first scavenging process are subjected to the second scavenging process. The concentrate from the second scavenging process is returned to the first scavenging process, and the tailings from the second scavenging process are titanium flotation tailings.

[0011] Secondly, a titanium concentrate obtained by the above method is provided, wherein the grade of the titanium concentrate is greater than 47.3%.

[0012] Furthermore, the sulfur content of the titanium concentrate is less than 0.15%.

[0013] Thirdly, the above methods are provided for application in improving the grade of titanium concentrate in strong magnetic concentrate, or for processing ultra-low grade strong magnetic concentrate with a titanium grade of 8-9%.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention provides a flotation recovery method for titanium elements in ultra-low-grade strong magnetic concentrate. By sequentially concentrating and desulfurizing the ultra-low-grade (8%–9%) strong magnetic concentrate, a high-concentration, low-sulfur slurry is obtained, creating excellent conditions for subsequent titanium flotation. Based on this, a combined flotation process of "first roughing, multiple cleaning, second roughing, and multiple scavenging" effectively recovers the high-concentration desulfurized ultra-low-grade strong magnetic concentrate.

[0015] This flotation recovery method exhibits excellent titanium flotation performance, efficiently recovering titanium elements. Furthermore, the flotation operation is easy to control and runs smoothly. This not only stabilizes the quality of the titanium concentrate, ensuring it meets qualified standards, but also significantly increases titanium concentrate yield, with the titanium flotation recovery rate rising substantially to over 78%. The resulting titanium concentrate has a high and stable grade (greater than 47.3%), low sulfur content (below 0.15%), and reduces reagent consumption.

[0016] This invention successfully solves a long-standing problem in the industry: when the titanium grade entering the flotation is only 8% to 9%, traditional methods cannot select qualified titanium concentrate (titanium grade > 46%). However, the method of this invention does not require pre-raising the titanium grade of the strong magnetic concentrate to above 13%, and can directly produce high-quality titanium concentrate.

[0017] 2. The titanium concentrate provided by this invention has excellent quality and very stable grade. During normal production, the titanium concentrate grade is greater than 47.3%, and the sulfur content of the titanium concentrate is less than 0.15%.

[0018] 3. The flotation recovery method for ultra-low grade strong magnetic concentrate titanium provided by this invention has a wide range of applications and advantages, and has important promotional value for the comprehensive utilization of low-grade titanium resources. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the operation of Embodiment 1 of the present invention.

[0020] Figure 2 This is a schematic diagram of the operation of Comparative Example 1 in the specification of this invention. Specific Implementation In an embodiment of the present invention, firstly, a method is provided. A flotation recovery method for titanium in ultra-low grade strong magnetic concentrate includes the following steps: The concentrated concentrate is obtained by concentrating the strongly magnetic concentrate. The concentrated concentrate is desulfurized to obtain desulfurized strong magnetic concentrate; The desulfurized strong magnetic concentrate is subjected to the first roughing process to obtain the roughing concentrate and the first tailings. Titanium concentrate is obtained by subjecting the rough concentrate to a first preset number of fine treatments; The first tailings are subjected to a second roughing process and a second preset number of scavenging processes to obtain titanium flotation tailings.

[0022] The first roughing, second roughing, cleaning, and scavenging operations all employ a flotation reagent system containing collectors and modifiers.

[0023] In some embodiments of the present invention, the titanium grade of the strong magnetic concentrate is 8-9%.

[0024] In some embodiments of the present invention, the first preset number of times is 3 to 6 times.

[0025] In some embodiments of the present invention, the first preset number of times is 5 times.

[0026] In some embodiments of the present invention, the selected specific operations are as follows: The roughing concentrate is cleaned for the first time, the tailings from the first cleaning are returned to the roughing process, and the concentrate from the first cleaning is cleaned for the second time. The tailings from the second refining process are returned to the first refining process, and the concentrate from the second refining process is subjected to the third refining process. The tailings from the third fine-tuning are returned to the second fine-tuning, and the concentrate from the third fine-tuning is subjected to the fourth fine-tuning. The tailings from the fourth refinement are returned to the third refinement, and the concentrate from the fourth refinement is subjected to the fifth refinement. The tailings from the fifth refinement were returned to the fourth refinement, and the concentrate from the fifth refinement was titanium concentrate.

[0027] In some embodiments of the present invention, the second preset number of times is 2 times.

[0028] In some embodiments of the present invention, the specific operation of the scavenging is to perform a second roughing on the first tailings to obtain a second roughing concentrate and a second roughing tailings; The tailings from the second roughing process are subjected to the first scavenging process, the concentrate from the first scavenging process is returned to the second roughing process, and the tailings from the first scavenging process are subjected to the second scavenging process. The concentrate from the second scavenging process is returned to the first scavenging process, and the tailings from the second scavenging process are titanium flotation tailings.

[0029] Secondly, a titanium concentrate obtained by the above method is provided, wherein the grade of the titanium concentrate is greater than 47.3%.

[0030] In some embodiments of the present invention, the sulfur content of the titanium concentrate is less than 0.15%.

[0031] Thirdly, the above methods are provided for application in improving the grade of titanium concentrate in strong magnetic concentrate, or for processing ultra-low grade strong magnetic concentrate with a titanium grade of 8-9%.

[0032] Example 1 In this embodiment, titanium concentrate is prepared using the method of the present invention. Please refer to the relevant documentation. Figure 1 The specific preparation method is as follows: A strong magnetic concentrate with a titanium grade of 8.5% was concentrated to obtain a concentrated concentrate. The concentrated concentrate is desulfurized to obtain desulfurized strong magnetic concentrate; The desulfurized strong magnetic concentrate is subjected to the first roughing process to obtain the roughing concentrate and the first tailings. Titanium concentrate is obtained by performing five finer processes on the rougher concentrate. The rougher concentrate is then subjected to five finer processes in sequence: the tailings from the first finer process are returned to the rougher concentrate, and the concentrate is subjected to the second finer process; the tailings from the second finer process are returned to the first finer process, and the concentrate is subjected to the third finer process; the tailings from the third finer process are returned to the second finer process, and the concentrate is subjected to the fourth finer process; the tailings from the fourth finer process are returned to the third finer process, and the concentrate is subjected to the fifth finer process; the tailings from the fifth finer process are returned to the fourth finer process, and the concentrate is titanium concentrate.

[0033] The first tailings are subjected to a second roughing and two scavenging processes to obtain titanium flotation tailings. Specifically, the scavenging process involves subjecting the first tailings to a second roughing process to obtain a second roughing concentrate and a second roughing tailings. The tailings from the second roughing process are subjected to the first scavenging process, the concentrate from the first scavenging process is returned to the second roughing process, and the tailings from the first scavenging process are subjected to the second scavenging process. The concentrate from the second scavenging process is returned to the first scavenging process, and the tailings from the second scavenging process are titanium flotation tailings.

[0034] Testing revealed that the titanium concentrate obtained in this embodiment had a titanium grade of 47.5% and a sulfur content of 2.6%.

[0035] Example 2 In this embodiment, the remaining preparation steps and parameters are the same as in Example 1, except that the first preset number of times is 3. Finally, finished titanium concentrate and titanium tailings are obtained.

[0036] Example 3 In this embodiment, the remaining preparation steps and parameters are the same as in Example 1, except that the first preset number of times is 6. Finally, finished titanium concentrate and titanium tailings are obtained.

[0037] Example 4 The existing titanium flotation process is a "1 coarse + 2 scavenging + 4 clean" flotation process. The disadvantages of the existing process are: (1) When the amount of flotation is small and the load of the flotation machine is low, it is difficult to adjust the titanium flotation to a stable balance, and the time to maintain stability after adjustment is short.

[0038] (2) The finer particle size of the flotation material increases the difficulty of the titanium flotation operation.

[0039] (3) The desulfurization operation before floating titanium was not effective, which affected the floating titanium.

[0040] (4) The mixing capacity of the pre-floating titanium slurry mixing tank is weak and the mixing is insufficient, so the reagent cannot fully and effectively contact and coat the mineral particles.

[0041] (5) The titanium grade of the feed ore is extremely low (8%-9%). To obtain qualified titanium concentrate, the enrichment ratio is high. The original process configuration has fewer beneficiation times, and the concentrate grade often fails to meet the standard.

[0042] In this embodiment, 1. Adjust and optimize the operating parameters of each section of the strong magnetic generator, appropriately reduce the grade of the strong magnetic concentrate, strive to recover more strong magnetic material, and increase the amount of ore fed into the flotation.

[0043] 2. Adjust the high-frequency screen mesh to change the particle size of the feed ore while ensuring the liberation of ilmenite monomers, thereby reducing the content of ultrafine particles in the feed ore.

[0044] 3. The desulfurization process before titanium flotation was modified and optimized, improving the desulfurization effect and creating conditions for titanium flotation.

[0045] 4. The titanium flotation slurry mixing tank was modified and optimized into a high-efficiency and high-power mixing tank.

[0046] 5. Modify the titanium flotation process to a flotation process of "2 roughing + 2 scavenging + 5 cleaning".

[0047] The effect after modification: 1. After the modification, the floating titanium operation is easy to control and runs smoothly.

[0048] 2. The titanium concentrate grade is very stable. Except for occasional fluctuations caused by other reasons that result in the titanium concentrate grade falling below 47%, the titanium concentrate grade is greater than 47.3% during normal production. The sulfur content of the titanium concentrate is less than 0.15%.

[0049] 3. Titanium concentrate production has increased significantly, with the average daily output rising from about 30 tons before the upgrade to about 180 tons.

[0050] 4. The consumption of reagents has been reduced significantly. The amount of collector consumed per ton of titanium concentrate has decreased from 50 kg / t to 14.5 kg / t.

[0051] 5. The entire system optimization and transformation of the high-efficiency flotation recovery of titanium concentrate with ultra-low grade and strong magnetic concentrate not only stabilized the quality of titanium concentrate and increased the output of titanium concentrate, but also greatly improved the recovery rate of titanium flotation, which rose to over 78%.

[0052] 6. Due to the titanium grade of the feed ore being only 8%-9%, the successful example of optimizing and transforming the entire titanium flotation system has completely solved the industry problem that had plagued the industry for many years: "If the titanium grade of the strong magnetic concentrate is less than 10%, qualified titanium concentrate (titanium grade > 46%) cannot be selected."

[0053] Comparative Example 1 In this comparative example, please refer to Figure 2 The concentrated concentrate is obtained by subjecting the strong magnetic concentrate to strong magnetic treatment and concentration. The concentrated concentrate is desulfurized to obtain desulfurized strong magnetic concentrate; The desulfurized strong magnetic concentrate is subjected to the first roughing process to obtain the roughing concentrate and the first tailings. Titanium concentrate is obtained by performing four fine-tuning processes on the rough concentrate. The first tailings were scavenged twice to obtain floating titanium tailings.

[0054] Test case The finished titanium concentrate, flotation tailings, and concentrated concentrate from Examples 1-5 and Comparative Example 1 were subjected to performance tests. The grade and titanium flotation recovery rate of the finished titanium concentrate, flotation tailings, and concentrated concentrate were determined, and the data are shown in the table below.

[0055] Table 1

[0056] As shown in Table 1, the titanium concentrate obtained using the method of the present invention in Examples 1-4 all have a grade greater than 47.3%, while the titanium tailings grade is only 2-3%, whereas the titanium tailings grade in Comparative Example 1 is 3.5-4%. Furthermore, the titanium flotation recovery rate of Examples 1-4 using the method of the present invention is all above 78%, while the titanium flotation recovery rate of the comparative example is only 63.9%.

[0057] As can be seen, the flotation recovery method of this invention has a good titanium flotation effect, can efficiently recover titanium elements, and the titanium flotation operation is easy to control and runs smoothly. This not only stabilizes the quality of titanium concentrate, making it meet the qualified product standard, but also significantly increases the titanium concentrate yield, with the titanium flotation recovery rate greatly increased to over 78%. The obtained titanium concentrate has a high and stable grade (greater than 47.3%), low sulfur content (less than 0.15%), and reduces reagent consumption, demonstrating significant advantages.

[0058] The above provides a detailed description of a flotation recovery method for ultra-low grade strong magnetic concentrate titanium element provided by the present invention. Specific examples have been used to illustrate the principle and implementation of the present invention. The above description of the embodiments is only for helping to understand the method and core idea of ​​the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A flotation recovery method for titanium element in ultra-low grade strong magnetic concentrate, characterized in that, The process includes the following steps: taking a strong magnetic concentrate and concentrating it to obtain a concentrated concentrate; The concentrated concentrate is desulfurized to obtain desulfurized strong magnetic concentrate; The desulfurized strong magnetic concentrate is subjected to the first roughing process to obtain the roughing concentrate and the first tailings. Titanium concentrate is obtained by subjecting the rough concentrate to a first preset number of fine treatments; The first tailings are subjected to a second roughing process and a second preset number of scavenging processes to obtain titanium flotation tailings.

2. The flotation recovery method for ultra-low grade strong magnetic concentrate titanium element according to claim 1, characterized in that, The titanium grade of the strong magnetic concentrate is 8-9%.

3. The flotation recovery method for ultra-low grade strong magnetic concentrate titanium element according to claim 1, characterized in that, The first preset number of times is 3 to 6 times.

4. The flotation recovery method for titanium element in ultra-low grade strong magnetic concentrate according to claim 1, characterized in that, The first preset number of times is 5 times.

5. The flotation recovery method for titanium element in ultra-low grade strong magnetic concentrate according to claim 4, characterized in that, The specific operation of the fine selection is as follows: the rough concentrate is finely selected for the first time, the tailings of the first fine selection are returned to the rough concentrate, and the concentrate of the first fine selection is finely selected for the second time. The tailings from the second refining process are returned to the first refining process, and the concentrate from the second refining process is subjected to the third refining process. The tailings from the third fine-tuning are returned to the second fine-tuning, and the concentrate from the third fine-tuning is subjected to the fourth fine-tuning. The tailings from the fourth refinement are returned to the third refinement, and the concentrate from the fourth refinement is subjected to the fifth refinement. The tailings from the fifth refinement were returned to the fourth refinement, and the concentrate from the fifth refinement was titanium concentrate.

6. The flotation recovery method for titanium element in ultra-low grade strong magnetic concentrate according to claim 1, characterized in that, The second preset number of times is 2.

7. The flotation recovery method for titanium element in ultra-low grade strong magnetic concentrate according to claim 6, characterized in that, The specific operation of the scavenging is to perform a second roughing on the first tailings to obtain a second roughing concentrate and a second roughing tailings; The tailings from the second roughing process are subjected to the first scavenging process, the concentrate from the first scavenging process is returned to the second roughing process, and the tailings from the first scavenging process are subjected to the second scavenging process. The concentrate from the second scavenging process is returned to the first scavenging process, and the tailings from the second scavenging process are titanium flotation tailings.

8. A titanium concentrate obtained by the method according to any one of claims 1 to 7, characterized in that, The grade of the titanium concentrate is greater than 47.3%.

9. A titanium concentrate according to claim 8, characterized in that, The sulfur content of the titanium concentrate is less than 0.15%.

10. The application of the method according to any one of claims 1 to 7 in improving the grade of titanium concentrate in strong magnetic concentrate, or in processing ultra-low grade strong magnetic concentrate with a titanium grade of 8 to 9%.

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