Method for efficient flotation of ilmenite in vanadium-titanium magnetite
By adjusting the particle size distribution and classification process of vanadium-titanium magnetite flotation ore, the problems of high flotation difficulty and high tailings grade of ilmenite were solved, achieving efficient and low-cost ilmenite flotation results.
Patent Information
- Application Number
- CN202310263257.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-17
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2043-03-17
AI Technical Summary
In the flotation process of ilmenite from vanadium-titanium magnetite, the presence of iron and titanium in the gangue makes flotation difficult, resulting in high tailings grade, low concentrate grade, and difficulty in controlling reagent costs.
By adjusting the particle size distribution of the raw flotation ore, the weight content of materials larger than a certain screen aperture size is 5%, and the weight content of materials smaller than 1/4 of that screen aperture size in the total raw flotation ore is 8%-20%. The particle size distribution is optimized by using a combination of flat-bottom cyclone classification and high-frequency fine screen classification.
It improved flotation yield and concentrate grade, reduced reagent costs, and achieved low-cost and high-efficiency ilmenite flotation.
Abstract
Description
TECHNICAL FIELD
[0001] The present invention belongs to the field of beneficiation of ilmenite in vanadium-titanium magnetite, and more particularly, relates to a method for efficient flotation of ilmenite in vanadium-titanium magnetite. BACKGROUND
[0002] At present, in the field of ilmenite flotation in vanadium-titanium magnetite, because the gangue of the flotation raw ore contains iron and titanium, the floatability of the gangue is relatively close to the target mineral ilmenite, resulting in relatively large flotation difficulty. There is a common problem of high grade of flotation tailings and low grade of concentrate. Sometimes, no matter how to adjust the dosage of flotation reagent and other flotation conditions, it is difficult to achieve the ideal effect, and the cost of reagent use is difficult to control.
[0003] Therefore, it is desirable to design a method for improving the flotation efficiency of ilmenite in vanadium-titanium magnetite. SUMMARY
[0004] In view of the deficiencies of the prior art, the purpose of the present invention is to achieve the reduction of the flotation difficulty of ilmenite in vanadium-titanium magnetite, the improvement of efficiency, and the reduction of the cost of reagent use by changing the particle size composition of the ilmenite flotation raw ore of vanadium-titanium magnetite.
[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0006] According to an aspect of the present invention, a method for efficient flotation of ilmenite in vanadium-titanium magnetite is provided, wherein the particle size composition of the flotation raw ore satisfies the following requirements: when the weight content of the flotation raw ore greater than one sieve size is 5%, the weight content of the material less than 1 / 4 of the sieve size in the total flotation raw ore is 8%-20%.
[0007] In one embodiment of the present invention, the sieve size is 0.154 mm.
[0008] In one embodiment of the present invention, the weight content of the flotation raw ore greater than 0.154 mm is 5%, and the content of the material less than 0.0385 mm is 16%.
[0009] In one embodiment of the present invention, the flotation raw ore has a TiO2 grade of 13%, the flotation titanium concentrate after flotation has a TiO2 grade of 47%, the tailings have a TiO2 grade of 2.5%, and the recovery rate of flotation is 85%.
[0010] In one embodiment of the present invention, the weight content of the flotation raw ore greater than 0.154 mm is 5%, and the content of the material less than 0.0385 mm is 8%.
[0011] In one embodiment of the present application, the TiO2 grade of the raw flotation ore is 13%, the TiO2 grade of the flotation titanium concentrate after flotation is 49%, the TiO2 grade of the tailings is 1.5%, and the recovery rate of the flotation is 91%.
[0012] In one embodiment of the present application, the weight content of the raw flotation ore greater than 0.154 millimeter is 5%, and the content of the material less than 0.0385 millimeter is 20%.
[0013] In one embodiment of the present application, the TiO2 grade of the raw flotation ore is 14%, the TiO2 grade of the flotation titanium concentrate after flotation is 48%, the TiO2 grade of the tailings is 2.0%, and the recovery rate of the flotation is 89%.
[0014] In one embodiment of the present application, the particle size composition of the raw ore is obtained by feeding the overflow of the flat-bottom cyclone classification to the undersize of the high-frequency fine screen combined classification, adding the oversize of the high-frequency fine screen, and then separately classifying the overflow of the conical cyclone.
[0015] By adopting the technical scheme, the present application has the following advantages compared with the prior art:
[0016] The present application solves the problem that the flotation of ilmenite in vanadium-titanium magnetite is difficult due to the wide particle size range of the raw flotation ore, and provides technical support for improving the flotation recovery rate and concentrate grade, which is beneficial to low-cost production and yield improvement. DETAILED DESCRIPTION
[0017] It should be understood that the embodiments of the present application shown in the example embodiments are only illustrative. Although only a few embodiments are described in detail in the present application, those skilled in the art can easily appreciate that various modifications are possible without departing from the teachings of the present application subject matter. Accordingly, all such modifications should be included in the scope of the present application. Other substitutions, modifications, changes and omissions can be made to the design, operating conditions and parameters of the following example embodiments without departing from the spirit of the present application.
[0018] The present application provides a method for efficient flotation of ilmenite in vanadium-titanium magnetite, wherein the particle size composition of the raw flotation ore meets the following requirements: when the weight content of the raw flotation ore greater than a screen hole size is 5%, the weight content of the material less than 1 / 4 of the screen hole size in the total raw flotation ore is 8%-20%.
[0019] In the above method, the screen hole size is preferably 0.154 millimeter.
[0020] In the above method, preferably, the weight content of the flotation raw ore greater than 0.154 mm is 5%, the content of the material less than 0.0385 mm is 16%; the TiO2 grade of the flotation raw ore is 13%, the TiO2 grade of the flotation titanium concentrate after flotation is 47%, the TiO2 grade of the tailings is 2.5%, and the recovery rate of the flotation is 85%.
[0021] In the above method, preferably, the weight content of the flotation raw ore greater than 0.154 mm is 5%, the content of the material less than 0.0385 mm is 8%; the TiO2 grade of the flotation raw ore is 13%, the TiO2 grade of the flotation titanium concentrate after flotation is 49%, the TiO2 grade of the tailings is 1.5%, and the recovery rate of the flotation is 91%.
[0022] In the above method, preferably, the weight content of the flotation raw ore greater than 0.154 mm is 5%, the content of the material less than 0.0385 mm is 20%; the TiO2 grade of the flotation raw ore is 14%, the TiO2 grade of the flotation titanium concentrate after flotation is 48%, the TiO2 grade of the tailings is 2.0%, and the recovery rate of the flotation is 89%.
[0023] In the above method, the particle size composition of the raw ore is obtained by feeding the overflow of the flat-bottom cyclone classification into the undersize of the high-frequency fine screen combined classification, adding the oversize of the high-frequency fine screen, and then separately classifying the overflow of the conical cyclone again.
[0024] The above technical solutions of the present application will be described in detail below through specific embodiments.
[0025] The present application provides a method for improving the efficiency of flotation of ilmenite in vanadium-titanium magnetite.
[0026] In the present embodiment, the classification process can be combined to achieve the method, and when the particle size distribution range exceeds the particle size distribution range of the method, the classification process can be adjusted to achieve, such as reducing the classification screen size, adjusting the classification concentration of the cyclone, etc.
[0027] The present embodiment provides a method for efficient flotation of ilmenite in vanadium-titanium magnetite, wherein the particle size composition of the flotation raw ore needs to reach the weight content of the flotation raw ore greater than a certain screen size A equal to 5%, and the weight content of the material less than 1 / 4 of the screen size A in the total flotation raw ore should be greater than or equal to 8% and less than or equal to 20%. Through a large number of experiments, the particle size composition can maximize the reduction of metal loss of flotation tailings and the improvement of the grade of flotation concentrate, reduce the cost of reagent use, and solve the problems of high grade of flotation tailings and low grade of concentrate.
[0028] Example 1
[0029] A method for efficient flotation of ilmenite in vanadium-titanium magnetite, the steps are: the particle size composition of the flotation raw ore needs to reach, the weight content of the flotation raw ore larger than a certain screen hole size A is equal to 5%, then when the weight content of 1 / 4 of the material smaller than the screen hole size A in the total flotation raw ore is equal to 8%, the flotation efficiency is high, and the reagent use cost is further reduced. Specifically, the ilmenite flotation raw ore of a certain refractory vanadium-titanium magnetite, the content of +0.154mm particle size is 5%, and the content of-0.0385mm particle size is 8%. The particle size composition of the raw ore is obtained by feeding the overflow of the flat bottom cyclone classification into the undersize of the high-frequency fine screen combined classification plus the oversize of the high-frequency fine screen, and then separately classifying the overflow of the conical cyclone. The gangue is olivine and titanic augite, the flotation raw ore TiO2 grade is 13%, the flotation titanium concentrate TiO2 grade is 49%, the tailings TiO2 grade is 1.5%, the recovery rate is as high as 91%, the concentrate grade meets the requirements, and the unit concentrate collector consumption level is 10kg / t.
[0030] Example 2
[0031] A method for efficient flotation of ilmenite in vanadium-titanium magnetite, the steps are: the particle size composition of the flotation raw ore needs to reach, the weight content of the flotation raw ore larger than a certain screen hole size A is equal to 5%, then when the weight content of 1 / 4 of the material smaller than the screen hole size A in the total flotation raw ore is equal to 16%, the flotation efficiency is higher, and the reagent use cost is further reduced. Specifically, the ilmenite flotation raw ore of a certain refractory vanadium-titanium magnetite, the content of +0.154mm particle size is 5%, and the content of-0.0385mm particle size is 16%. The particle size composition of the raw ore is obtained by feeding the overflow of the flat bottom cyclone classification into the undersize of the high-frequency fine screen combined classification plus the oversize of the high-frequency fine screen, and then separately classifying the overflow of the conical cyclone. The gangue is olivine and titanic augite, the flotation raw ore TiO2 grade is 13%, the flotation titanium concentrate TiO2 grade is 47%, the tailings TiO2 grade is 2.5%, the recovery rate is as high as 85%, the concentrate grade meets the requirements, and the unit concentrate collector consumption level is 10kg / t.
[0032] Example 3
[0033] A method for efficient flotation of ilmenite in vanadium-titanium magnetite, the steps are: the particle size composition of the flotation raw ore needs to reach, the weight content of the flotation raw ore larger than a certain screen hole size A is equal to 5%, then when the weight content of 1 / 4 of the material smaller than the screen hole size A in the total flotation raw ore is equal to 20%, the flotation efficiency is high, and the reagent use cost is reduced. Specifically, the ilmenite flotation raw ore of a certain refractory vanadium-titanium magnetite, the +0.154mm size fraction content is 5%, and the -0.0385mm size fraction content is 20%. The particle size composition of the raw ore is obtained by feeding the overflow of the flat bottom cyclone classification into the undersize of the high frequency fine screen combined classification plus the oversize of the high frequency fine screen, and then separately classifying the overflow of the conical cyclone. The gangue is olivine and titanic augite, the flotation raw ore TiO2 grade is 14%, the flotation titanium concentrate TiO2 grade is 48%, the tailings TiO2 grade is 2.0%, the recovery rate is as high as 89%, the concentrate grade meets the requirements, and the unit concentrate collector consumption level is 11 kg / t.
[0034] Comparative Example 1
[0035] A method for flotation of ilmenite in vanadium-titanium magnetite, the steps are: when the particle size composition of the flotation raw ore needs to reach, the weight content of the flotation raw ore larger than a certain screen hole size A is equal to 5%, the weight content of 1 / 4 of the material smaller than the screen hole size A in the total flotation raw ore is equal to 5%, a large number of classification equipment is required, and the flotation effect fluctuates greatly, sometimes reducing the flotation recovery rate and concentrate grade. Specifically, the ilmenite flotation raw ore of a certain vanadium-titanium magnetite, the +0.154mm size fraction content is 5%, and the -0.0385mm size fraction content is 5%. The particle size composition of the raw ore is obtained by feeding the overflow of the flat bottom cyclone classification into the undersize of the high frequency fine screen combined classification plus the oversize of the high frequency fine screen, and then separately classifying the overflow of the conical cyclone. However, the number of classification equipment used is doubled based on the preferred example. The gangue is olivine and titanic augite, the flotation raw ore TiO2 grade is 13%, the flotation titanium concentrate TiO2 grade is 46%, the tailings TiO2 grade is 3.5%, the recovery rate is reduced to 79%, the concentrate grade is relatively low, and the unit concentrate collector consumption level is 10 kg / t.
[0036] Comparative Example 2
[0037] A method for flotation of ilmenite in vanadium-titanium magnetite, comprising the following steps: when the particle size composition of the flotation raw ore needs to reach a weight content of the flotation raw ore greater than a certain sieve size A equal to 5%, the weight content of 1 / 4 of the material smaller than the sieve size A in the total flotation raw ore is equal to 26%, which will significantly reduce the flotation recovery and concentrate grade. Specifically, the ilmenite flotation raw ore of a certain vanadium-titanium magnetite has a +0.154 mm particle size content of 5%, and a -0.0385 mm particle size content of 26%, and the particle size composition of the raw ore is obtained by feeding the overflow of the flat bottom cyclone classification to the undersize of the high-frequency fine screen combined classification plus the oversize of the high-frequency fine screen, and then separately classifying the overflow of the conical cyclone again. The gangue is olivine and titanic augite, the flotation raw ore TiO2 grade is 13%, the flotation titanium concentrate TiO2 grade is 44%, the tailings TiO2 grade is 4.5%, the recovery rate is reduced to 72.83%, the concentrate grade is relatively lower, and cannot meet the market requirements, the unit concentrate collector consumption level is 13 kg / t, and the collector reagent consumption is increased.
[0038] As can be seen by comparing the above examples 1-3 with comparative examples 1-2, the examples of the present application improve the flotation recovery and concentrate grade and reduce the flotation tailings grade and reagent use cost. The present application realizes the high efficiency of the ilmenite flotation of vanadium-titanium magnetite by making the particle size distribution range of the ilmenite flotation raw ore of vanadium-titanium magnetite reach a reasonable range.
[0039] The above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application; if the present application is modified or replaced by equivalents without departing from the spirit and scope of the present application, it should be covered in the protection scope of the claims of the present application.
Claims
1. A method for efficient flotation of ilmenite in vanadium-titanium magnetite, characterized in that, The particle size distribution of the flotation ore should meet the following requirements: when the weight content of the flotation ore larger than one screen aperture size is 5%, the weight content of the material smaller than 1 / 4 of the screen aperture size in the flotation ore is 8%-20% in the total flotation ore; the particle size distribution of the ore is obtained by adding the undersize material from the flat-bottom cyclone classification overflow fed into the high-frequency fine screen combination classification, and the oversize material from the high-frequency fine screen, which is then separately classified by a conical cyclone separator.
2. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 1, characterized in that, The sieve aperture size is 0.154 mm.
3. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 2, characterized in that, The weight content of flotation ore larger than 0.154 mm is 5%, and the content of material smaller than 0.0385 mm is 16%.
4. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 3, characterized in that, The TiO2 grade of the raw ore was 13%, the TiO2 grade of the titanium concentrate was 47%, the TiO2 grade of the tailings was 2.5%, and the flotation recovery rate was 85%.
5. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 2, characterized in that, The weight content of flotation ore larger than 0.154 mm is 5%, and the content of material smaller than 0.0385 mm is 8%.
6. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 5, characterized in that, The TiO2 grade of the raw ore was 13%, the TiO2 grade of the titanium concentrate was 49%, the TiO2 grade of the tailings was 1.5%, and the flotation recovery rate was 91%.
7. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 2, characterized in that, The weight content of flotation ore larger than 0.154 mm is 5%, and the content of material smaller than 0.0385 mm is 20%.
8. The method for efficient flotation of ilmenite in vanadium-titanium magnetite according to claim 7, characterized in that, The TiO2 grade of the raw ore was 14%, the TiO2 grade of the titanium concentrate was 48%, the TiO2 grade of the tailings was 2.0%, and the flotation recovery rate was 89%.