CN112871437B - Recovery method of ultra-fine ilmenite - Google Patents
Recovery method of ultra-fine ilmenite Download PDFInfo
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- CN112871437B CN112871437B CN202110032549.9A CN202110032549A CN112871437B CN 112871437 B CN112871437 B CN 112871437B CN 202110032549 A CN202110032549 A CN 202110032549A CN 112871437 B CN112871437 B CN 112871437B
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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Abstract
The invention relates to the technical field of oxidized mineral flotation, and discloses a method for recovering ultra-fine ilmenite, which comprises the following steps: s1, carrying out strong magnetic separation on raw ores to obtain floating materials and magnetic separation tailings; s2, adopting a flotation column to perform rough concentration on the floating material to obtain rough concentrate and rough tailings; s3, sequentially carrying out primary titanium concentration and secondary titanium concentration on the rough concentration concentrate to obtain titanium concentrate; wherein, the first-stage titanium concentration adopts a flotation column, and the second-stage titanium concentration adopts a flotation machine; the recovery method can effectively solve the problems that the ultra-fine ilmenite is difficult to recover, the ilmenite mineral and the gangue mineral in the pyroxene type micro-fine ilmenite are difficult to separate and the like, and has simple process and good separation effect.
Description
Technical Field
The invention relates to the technical field of oxidized mineral flotation, in particular to a method for recovering ultra-fine ilmenite.
Background
As the primary ilmenite in China is restricted by the development and utilization of iron ore, the granularity of the ore entering the titanium separation operation is gradually reduced, so that the comprehensive recovery rate of the titanium resource is only about 22 percent, and a large amount of fine-particle ilmenite is lost in tailings, thereby causing the serious waste of the titanium resource. According to recent data statistics in Panxi area, in the titanium resource in Panzhihua area, the content of-19 μm fine particle fraction is about 35%, and the content of-10 μm fine particle fraction is about 15%; however, in order to reduce the influence of the fine-particle ilmenite in some titanium separation plants, a graded desliming method is directly adopted to discharge-19 mu m size fraction into tailings, which causes a great loss of resources. Secondly, as most mines in the Panxi region enter middle and deep mining, the properties of the ores are greatly changed, the original pyroxene type ilmenite is gradually changed into the pyroxene type ilmenite, the content of the olivine in the ores is obviously increased, the disseminated particle size of useful minerals is obviously thinned, and the method is most obvious in the North Hongge mine area. Along with the great change of the properties of the ores, the ore dressing difficulty of the ores is increased. For example, Tectona tetrapanacis, TiO in two-stage high intensity magnetic separation tailings2The grade reaches about 5 percent, the yield of micro-fine particles (-0.038mm) is 61 percent, and the grade TiO2The distribution rate is 80%, and the part of the fine-particle ilmenite enters tailings, so that the improvement of the titanium recovery rate is seriously influenced.
At present, the research on the flotation separation of the micro-fine ilmenite at home and abroad mainly centers on two aspects of a flotation process and a flotation reagent. In recent years, researchers have mainly adopted a main means for solving the problem that the flotation and recovery of the fine ilmenite are difficult, namely, under the premise that ore pulp is fully dispersed, the fine ilmenite is selectively hydrophobized to form agglomerates, and the conventional flotation and separation of the fine ilmenite are realized by increasing the apparent particle size of particles, wherein related processes are collectively called as a 'hydrophobic flocculation separation method', and the method comprises the following steps: carrier flotation, oil agglomeration flotation, shearing flocculation flotation, floating oil extraction and the like, and the method has certain separation effect in a certain application range. These studies have better solved the problem of flotation separation of ilmenite from gangue minerals in ores with simple mineral composition (gabbros type). However, the flotation separation problem of the ilmenite minerals and the gangue minerals is difficult to effectively solve by only starting from the aspects of the conventional flotation process and medicament development aiming at the fact that the mineral composition in the olivine type fine-particle ilmenite is more complex.
Disclosure of Invention
The invention aims to provide a recovery method of ultra-fine ilmenite, aiming at solving the problems that the mineral resource of the ultra-fine ilmenite in the ilmenite resource is difficult to utilize, the resource is lost greatly when the mineral resource is discharged into tailings, and the ilmenite and gangue minerals in the pyroxene type micro-fine ilmenite with fine embedded granularity of the useful minerals are difficult to separate.
The purpose of the invention is realized by the following technical scheme: a method for recovering ultra-fine ilmenite comprises the following steps:
s1, carrying out strong magnetic separation on raw ores to obtain floating materials and magnetic separation tailings;
s2, adopting a flotation column to perform rough concentration on the floating material to obtain rough concentrate and rough tailings;
s3, sequentially carrying out primary titanium concentration and secondary titanium concentration on the rough concentration concentrate to obtain titanium concentrate; wherein, flotation columns are adopted in the first-stage titanium concentration, and flotation machines are adopted in the second-stage titanium concentration.
In the technical scheme, the recovery of the ultrafine ilmenite with the granularity close to the floatable edge can be realized only by the strong magnetic separation, the rough separation, the primary titanium concentration and the secondary titanium concentration, the process is simple, and the separation and recovery effects are obvious. The strong magnetic separation is adopted to pre-enrich ilmenite, so that tailings can be discarded in advance, and the effect of reducing the beneficiation cost is achieved; the flotation column is adopted for roughing and primary titanium concentration, so that the separation of the ultra-fine ilmenite and gangue minerals is improved, and the recovery effect of the ultra-fine ilmenite is enhanced; and finally, the secondary titanium concentration is carried out by matching with a flotation machine, so that the mechanical entrainment of foams caused by the steps can be reduced, and the concentrate grade is better improved.
In certain embodiments, the strong magnetic separation comprises at least 1 sweep and at least 1 rougher flotation; the magnetic field intensity of the roughing is 1.0-1.1T, and the magnetic field intensity of the scavenging is 1.2-1.3T.
In certain embodiments, the conditions of strong magnetic separation are: the feeding concentration is 15-20%, the rod medium is 1.0mm, the number of punching times is 300-350 times/min, and the stroke is 35 mm.
In certain embodiments, the raw ore is ultra-fine ilmenite with a mass percentage of minerals of-0.019 mm size fraction > 70%.
In some embodiments, the method further comprises the step of scavenging the rougher tailings with a flotation machine to obtain scavenged concentrate and scavenged tailings; wherein the scavenger concentrate is returned to step S2 and the scavenger tail is discharged as tailings.
In certain embodiments, the number of sweeps is from 1 to 2.
In certain embodiments, the flotation machine comprises a mechanically agitated flotation machine.
In certain embodiments, the flotation column comprises a micro-bubble flotation column.
In the technical scheme, the size of the bubbles can be reduced through the micro-bubble type flotation column, and the micro bubbles are generated, so that the collision and adhesion probability of the bubbles and the ultra-fine minerals is increased, and the effect of improving the sorting property of the ultra-fine minerals is achieved.
In certain embodiments, the rougher flotation is at least 1 time.
In certain embodiments, the primary titanium concentration is at least 1 time; and/or, the secondary titanium concentration is at least 2 times.
In certain embodiments, each titanium concentration also results in a respective concentration middlings that is returned to the previous stage of the operation in sequence.
In certain embodiments, the rougher flotation and/or primary titanium cleaner flotation and/or secondary titanium cleaner flotation agents include at least one of a modifier, a collector, sulfuric acid, and diesel.
In certain embodiments, the modulator comprises hydroxyethylidene bisphosphonate, sodium carboxymethylcellulose, and water glass.
In certain embodiments, the collector comprises MOH.
In the technical scheme, the regulator is matched with sulfuric acid to adjust the surface property difference between ilmenite and gangue minerals, and then the MOH is used as a collector and matched with neutral oil diesel oil to perform flotation. The mixture of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass is used as a regulator, can disperse slime, activate ilmenite and assist in inhibiting gangue minerals (olivine and pyroxene), has good dispersing and gangue mineral inhibiting effects on ultrafine ilmenite flotation, achieves good flotation effect under the condition of small medicament dosage and simple flotation process, and accordingly remarkably improves the grade and recovery rate of the obtained titanium concentrate. In particular, the hydroxyethylidene diphosphonate primarily assumes a dispersing action and does not chemically interact with minerals; the sodium carboxymethyl cellulose and the sodium silicate play a role in inhibiting gangue minerals, and the sodium carboxymethyl cellulose also has a dispersing effect on ultrafine grain minerals.
It will be appreciated that the ratio of sodium carboxymethylcellulose to water glass depends on the gangue mineral content and the ratio of hydroxyethylidene diphosphate depends on the fine mineral content; when the properties of the raw ore, such as the type and content of gangue minerals, the particle size distribution of the granules, etc., are significantly changed, the proportions of hydroxyethylidene diphosphonate, sodium carboxymethyl cellulose and water glass may be adjusted accordingly to accommodate the change.
In certain embodiments, the number of roughers is 1; the using amount of the regulator is 300-350 g/t of raw ore, the using amount of the collector is 1600-1700 g/t of raw ore, the using amount of the sulfuric acid is 2800-3000 g/t of raw ore, and the using amount of the diesel oil is 125-145 g/t of raw ore.
In certain embodiments, the number of primary titanium beneficiations is 1; the using amount of the regulator is 80-100 g/t of raw ore, the using amount of the collector is 200-250 g/t of raw ore, the using amount of the sulfuric acid is 400-500 g/t of raw ore, and the using amount of the diesel oil is 30-40 g/t of raw ore.
In certain embodiments, the secondary titanium concentration is performed 3 times;
in the 1 st time, the using amount of the regulator is 80-100 g/t of raw ore, the using amount of the collector is 200-250 g/t of raw ore, the using amount of the sulfuric acid is 160-200 g/t of raw ore, and the using amount of the diesel oil is 15-20 g/t of raw ore;
in the 2 nd time, the using amount of the regulator is 40-50 g/t of raw ore, the using amount of the collector is 100-120 g/t of raw ore, and the using amount of the sulfuric acid is 80-100 g/t of raw ore;
and in the 3 rd time, the using amount of the collecting agent is 200-250 g/t of raw ore, and the using amount of the sulfuric acid is 80-100 g/t of raw ore.
In certain embodiments, in the primary titanium concentration and/or the secondary titanium concentration, the pH of the ore pulp is 3.0-4.0, preferably 3.0.
In the technical scheme, the flotation effect of the recovery method on the ilmenite can be ensured by limiting the pH of the ore pulp to be 3.0-4.0, wherein the flotation effect is the best when the pH of the ore pulp is 3.0.
It should be noted that "and/or" in the present invention means that two technical features connected through "and/or" may be in a parallel relationship or an alternative relationship. For example, "A and/or B" includes "A", "B", and "A + B".
The invention has the beneficial effects that:
1. the recovery method of the ultra-fine ilmenite has the advantages of simple process and obvious separation effect on the ultra-fine ilmenite.
2. Compared with the traditional fine particle recovery method, the recovery method of the ultra-fine ilmenite can achieve a better recovery effect on the ultra-fine ilmenite with the particle size close to the floatable edge, so that the finer ilmenite can be better recovered.
3. The recovery method of the ultrafine-grained ilmenite can effectively solve the problems that the ultrafine-grained ilmenite is difficult to recover, and the ilmenite mineral and the gangue mineral in the pyroxene type ultrafine-grained ilmenite are difficult to separate.
Drawings
FIG. 1 is a flow diagram of a process for the recovery of ultra fine ilmenite according to the invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Example 1
A process for recovering superfine ilmenite from the inclined plate overflow of TiO sample from the strong magnetic separation of the second segment of Panzhihua company2The content is only 16.94%, most ilmenite is concentrated at-0.019 mm, accounting for 79.22%, wherein TiO of-0.010 mm242.05% and 49.75% distribution rate. The method specifically comprises the following steps (as shown in figure 1):
s1, carrying out strong magnetic separation on the raw materials to be selected, and preferentially removing 43.65% of tailings to obtain TiO2The grade is improved to 22.85 percent, and TiO2The recovery rate of the floating materials is 76.03 percent;
wherein, the strong magnetic separation comprises 1 rough separation and 2 scavenging; the conditions of strong magnetic separation are as follows: the feeding concentration is 15%, the rod medium is 1.0mm, the stroke is 300 times/min, the stroke is 35mm, the magnetic field intensity of rough concentration is 1.0T, and the magnetic field intensity of scavenging is 1.3T;
s2, adopting a micro-bubble flotation column (a flotation column of phi 80 multiplied by 2200mm developed by a certain company in Hunan) to carry out 1-time rough concentration on the floating materials to obtain rough concentrate and rough tailings;
wherein, the roughly selected medicament system is as follows: 300g/t of regulating agent, 1600g/t of raw ore, 3000g/t of sulfuric acid and 135g/t of diesel oil; wherein the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s3, carrying out scavenging on the roughed tailings for 1 time by adopting a 24L mechanical flotation machine to obtain scavenged concentrate and scavenged tailings, returning the scavenged concentrate to the step S2, and discharging the scavenged tailings serving as tailings;
s4, adjusting the pH value of the ore pulp of the floating material to 4 by using sulfuric acid, then carrying out titanium concentration for 1 time by using a micro-bubble flotation column (a flotation column of phi 80 x 2200mm developed by a certain company in Hunan), obtaining titanium concentrate I and concentrated middlings I, and returning the concentrated middlings I to the previous-stage operation;
wherein, the selected medicament system of the titanium is as follows: 100g/t of regulating agent, 200g/t of MOH, 500g/t of sulfuric acid and 30g/t of diesel oil; the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s5, carrying out titanium concentration on the titanium concentrate I for 3 times by adopting a 24L mechanical flotation machine to obtain titanium concentrate; before titanium is carefully selected each time, adjusting the pH value of the ore pulp to 3 by adopting sulfuric acid; each time of titanium concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous level of operation;
wherein, the 1 st titanium selection medicament system is as follows: 100g/t of regulating agent, 200g/t of MOH, 200g/t of sulfuric acid and 15g/t of diesel oil;
the 2 nd titanium selection medicament system is as follows: 50g/t of regulating agent, 100g/t of MOH and 100g/t of sulfuric acid;
the 3 rd titanium selection medicament system comprises the following components: MOH 200 g/t. raw ore, sulfuric acid 100 g/t. raw ore;
the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethyl cellulose and water glass.
Example 2
A process for recovering superfine ilmenite from the inclined plate overflow of TiO sample from the strong magnetic separation of the second segment of Panzhihua company2The content is only 16.94%, most ilmenite is concentrated at-0.019 mm, accounting for 79.22%, wherein TiO of-0.010 mm242.05% and 49.75% distribution rate. The method specifically comprises the following steps (as shown in figure 1):
s1, carrying out strong magnetic separation on the raw materials to be selected, and preferentially removing 42.87% of tailings to obtain TiO2The grade is improved to 22.56 percent, and TiO2The recovery rate of the floating materials is 76.35 percent;
wherein, the strong magnetic separation comprises 1 rough separation and 2 scavenging; the conditions of strong magnetic separation are as follows: the feeding concentration is 17%, the rod medium is 1.0mm, the stroke is 350 times/min, the stroke is 35mm, the magnetic field intensity of rough concentration is 1.1T, and the magnetic field intensity of scavenging is 1.2T;
s2, adopting a micro-bubble flotation column (a flotation column of phi 80 multiplied by 2200mm developed by a certain company in Hunan) to carry out 1-time rough concentration on the floating materials to obtain rough concentrate and rough tailings;
wherein, the roughly selected medicament system is as follows: 330g/t of regulating agent, 1650g/t of MOH, 2900g/t of sulfuric acid and 145g/t of diesel oil; wherein the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s3, performing scavenging on the roughed tailings for 2 times by adopting a 24L mechanical flotation machine to obtain scavenged concentrate and scavenged tailings, returning the scavenged concentrate to the step S2, and discharging the scavenged tailings serving as tailings;
s4, adjusting the pH value of the ore pulp of the floating material to 3 by adopting sulfuric acid, performing titanium concentration for 1 time by adopting a micro-bubble flotation column (a flotation column phi 80 x 2200mm developed by a certain company in Hunan), obtaining titanium concentrate I and concentrated middling I, and returning the concentrated middling I to the previous-stage operation;
wherein, the selected medicament system of the titanium is as follows: the modifier is 90 g/t.raw ore, MOH is 230 g/t.raw ore, sulfuric acid is 460 g/t.raw ore, and diesel oil is 35 g/t.raw ore; the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s5, carrying out titanium concentration on the titanium concentrate I for 2 times by adopting a 24L mechanical flotation machine to obtain titanium concentrate; before titanium is carefully selected each time, adjusting the pH value of the ore pulp to 3 by adopting sulfuric acid; each time of titanium concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous level of operation;
wherein, the 1 st titanium selection medicament system is as follows: the modifier is 90 g/t.raw ore, MOH 220 g/t.raw ore, sulfuric acid 180 g/t.raw ore and diesel oil 18 g/t.raw ore;
the 2 nd titanium selection medicament system is as follows: the modifier is 45 g/t.raw ore, MOH is 110 g/t.raw ore, and sulfuric acid is 90 g/t.raw ore;
the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethyl cellulose and water glass.
Example 3
A process for recovering superfine ilmenite from the inclined plate overflow of TiO sample from the strong magnetic separation of the second segment of Panzhihua company2The content is only 16.94%, most ilmenite is concentrated at-0.019 mm, accounting for 79.22%, wherein TiO of-0.010 mm242.05%, distribution rate is 49.75%. The method specifically comprises the following steps (as shown in figure 1):
s1, carrying out strong magnetic separation on the raw materials to be selected, and preferentially removing 40.43% of tailings to obtain TiO2The grade is improved to 21.21 percent, and TiO2The recovery rate of the floating material is 77.98 percent;
wherein, the strong magnetic separation comprises 1 rough separation and 2 scavenging; the conditions of strong magnetic separation are as follows: the feeding concentration is 20%, the rod medium is 1.0mm, the frequency of impact is 330 times/min, the stroke is 35mm, the magnetic field intensity of rough concentration is 1.1T, and the magnetic field intensity of scavenging is 1.3T;
s2, adopting a micro-bubble flotation column (a flotation column of phi 80 multiplied by 2200mm developed by a certain company in Hunan) to carry out 1-time rough concentration on the floating materials to obtain rough concentrate and rough tailings;
wherein, the roughly selected medicament system is as follows: 350g/t of raw ore, MOH 1700g/t of raw ore, 2800g/t of raw ore of sulfuric acid and 125g/t of raw ore of diesel oil; wherein the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s3, carrying out scavenging on the roughed tailings for 1 time by adopting a 24L mechanical flotation machine to obtain scavenged concentrate and scavenged tailings, returning the scavenged concentrate to the step S2, and discharging the scavenged tailings serving as tailings;
s4, adjusting the pH value of the ore pulp of the floating material to 3.5 by using sulfuric acid, then carrying out titanium concentration for 1 time by using a micro-bubble flotation column (a flotation column of phi 80 multiplied by 2200mm developed by a certain company in Hunan), obtaining titanium concentrate I and concentrated middlings I, and returning the concentrated middlings I to the previous-stage operation;
wherein, the selected medicament system of the titanium is as follows: 80g/t of regulating agent, 250g/t of MOH, 400g/t of sulfuric acid and 40g/t of diesel oil; the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass;
s5, carrying out titanium concentration on the titanium concentrate I for 3 times by adopting a 24L mechanical flotation machine to obtain titanium concentrate; before titanium is carefully selected each time, adjusting the pH value of the ore pulp to 3 by adopting sulfuric acid; each time of titanium concentration also obtains respective concentrated middlings, and the respective concentrated middlings are sequentially returned to the previous level of operation;
wherein, the 1 st titanium selection medicament system is as follows: 80g/t of regulating agent, 250g/t of MOH, 160g/t of sulfuric acid and 20g/t of diesel oil;
the 2 nd titanium concentration medicament system comprises: 40g/t of regulating agent, 120g/t of MOH and 80g/t of sulfuric acid;
the 3 rd titanium selection medicament system comprises the following components: MOH 250 g/t. raw ore, sulfuric acid 80 g/t. raw ore;
the regulator consists of hydroxyethylidene diphosphonate, sodium carboxymethyl cellulose and water glass.
Comparative example 1
Indexes of the titanium concentrate separated in the embodiment 1 of the invention are compared with those of the comparative example 1, wherein the comparative example 1 is different from the embodiment 1 in that: the micro-bubble flotation column (a phi 80 x 2200mm flotation column developed by a certain company in Hunan) in the step S2 was replaced with a 24L mechanical flotation machine, and the 24L mechanical flotation machine in the step S5 was replaced with a micro-bubble flotation column (a phi 80 x 2200mm flotation column developed by a certain company in Hunan); other conditions such as selection of the medicament, dosage of the medicament, subsequent adopted process flow and the like are the same as those of the embodiment 1 of the invention.
Comparative example 2
Indexes of the titanium concentrate separated in the embodiment 1 of the invention are compared with those of the comparative example 2, wherein the comparative example 2 is different from the embodiment 1 in that: replacing the micro-bubble flotation column (a phi 80 x 2200mm flotation column developed by a company in Hunan) in steps S2 and S4 with a 24L mechanical flotation machine; other conditions such as selection of the medicament, dosage of the medicament, subsequent adopted process flow and the like are the same as those of the embodiment 1 of the invention.
Comparative example 3
Indexes of the titanium concentrate separated in the embodiment 1 of the invention are compared with those of the comparative example 3, wherein the comparative example 3 is different from the embodiment 1 in that: replacing the micro-bubble flotation column (a phi 80 x 2200mm flotation column developed by a certain company in Hunan) in steps S2 and S4 with a 24L mechanical flotation machine, and replacing the 24L mechanical flotation machine in step S5 with a micro-bubble flotation column (a phi 80 x 2200mm flotation column developed by a certain company in Hunan); other conditions such as selection of the medicament, dosage of the medicament, subsequent adopted process flow and the like are the same as those of the embodiment 1 of the invention.
Comparative example 4
The indexes of the titanium concentrate separated in the embodiment 1 of the invention are compared with those of the comparative example 4, wherein the comparative example 4 is different from the embodiment 1 in that: step S4 is replaced with: scavenging the concentrated middlings I for 1 time by adopting a 24L mechanical flotation machine to obtain scavenged concentrate and scavenged tailings, and combining the scavenged concentrate and the titanium concentrate I to obtain titanium concentrate; other conditions such as selection of the medicament, dosage of the medicament, subsequent adopted process flow and the like are the same as those of the embodiment 1 of the invention.
Comparative example 5
The indexes of the titanium concentrate separated in the embodiment 2 of the invention are compared with those of the comparative example 5, wherein the comparative example 5 is different from the embodiment 2 in that: replacing the 24L mechanical flotation machine for the 1 st titanium concentration in step S5 with a micro-bubble flotation column (a Φ 80 × 2200mm flotation column developed by a company of hannan); other conditions such as selection of the medicament, dosage of the medicament, subsequent adopted process flow and the like are the same as those of the embodiment 2 of the invention.
The results are shown in the following table:
1) comparing comparative examples 1 to 3 with example 1, it can be seen that:
under the condition of the same medicament system: example 1 titanium concentrate TiO was obtained2Grade 47.82%, TiO2Index for recovery 62.86%. Comparative example 1 only titanium concentrate TiO was obtained2Grade 45.16%, TiO2The operation recovery rate is 63.19 percent, because the micro-bubbles are excessive in the subsequent concentration operation, so that the micro-fine gangue minerals are easy to float upwards along with the inclusion of the bubbles, and the micro-fine gangue minerals are not easy to be pressed. Comparative example 2 titanium concentrate TiO was obtained2Grade 46.56%, TiO2The recovery rate is 59.17%, and compared with example 1, the grade of the titanium concentrate is reduced by 1.26%, and the recovery rate is reduced by 3.69%. Comparative example 3 titanium concentrate TiO was obtained2Grade 46.08%, TiO2Compared with example 1, the grade of the titanium concentrate is reduced by 1.74% by the index of 62.63% recovery rate, and the recovery rate has no obvious difference. Therefore, compared with the traditional flotation process, the method for recovering the ultra-fine ilmenite has obvious advantages in the process of recovering the ultra-fine ilmenite by flotation.
2) Comparison of comparative example 4 with examples 1 to 3, comparative examples 1 to 3 and 5 revealed that: when the total times of titanium concentration is less than 3 times, the grade of the obtained titanium concentrate can only reach about 41 percent; when the total times of titanium concentration is more than 3 times, the grade of the obtained titanium concentrate can reach more than 45 percent. Therefore, for flotation of ultra fine ilmenite, it is necessary to increase the number of times titanium concentration is performed.
3) Comparing comparative example 5 with example 2, it can be seen that: the micro-bubble flotation column has the highest flotation efficiency in roughing and first-stage titanium concentration, and the micro-bubble flotation column is continuously used in the subsequent first-stage titanium concentration, so that the flotation efficiency is obviously reduced relative to a flotation machine.
The result shows that the recovery method of the ultra-fine ilmenite can simplify the flotation process, has large enrichment ratio and higher recovery rate, and is suitable for sorting ultra-fine particle minerals.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A method for recovering ultra-fine ilmenite is characterized by comprising the following steps:
s1, carrying out strong magnetic separation on raw ores to obtain floating materials and magnetic separation tailings;
s2, adopting a flotation column to perform rough concentration on the floating material to obtain rough concentrate and rough tailings;
s3, sequentially carrying out primary titanium concentration and secondary titanium concentration on the rough concentration concentrate to obtain titanium concentrate; wherein, flotation columns are adopted for roughing and primary titanium concentration, and a flotation machine is adopted for secondary titanium concentration; the primary titanium concentration is at least 1 time, and the secondary titanium concentration is at least 2 times; in the primary titanium concentration and the secondary titanium concentration, the pH value of ore pulp is 3.0-4.0; adding a flotation reagent into the rough concentration, the first-stage titanium concentration and the second-stage titanium concentration, wherein the flotation reagent comprises at least one of a regulator, a collector, sulfuric acid and diesel oil; the modifier comprises hydroxyethylidene diphosphonate, sodium carboxymethylcellulose and water glass, and the collector comprises MOH.
2. The recovery process according to claim 1, characterized in that the raw ore is ultra-fine ilmenite with a mass percentage of minerals of-0.019 mm size fraction > 70%.
3. The recovery method of claim 1, further comprising the step of scavenger flotation of the rougher tailings using a flotation machine to obtain scavenger concentrate and scavenger tailings; wherein the scavenger concentrate is returned to step S2 and the scavenger tail is discharged as tailings.
4. A method of recycling according to claim 1 or 3, characterized in that the flotation machine comprises a mechanical agitation flotation machine.
5. The recovery method of claim 1, wherein the flotation column comprises a micro bubble flotation column.
6. A recovery process according to claim 1, characterized in that each titanium concentration also results in a respective concentration middlings, which are returned to the previous stage in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110032549.9A CN112871437B (en) | 2021-01-11 | 2021-01-11 | Recovery method of ultra-fine ilmenite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110032549.9A CN112871437B (en) | 2021-01-11 | 2021-01-11 | Recovery method of ultra-fine ilmenite |
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| Publication Number | Publication Date |
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| CN112871437A CN112871437A (en) | 2021-06-01 |
| CN112871437B true CN112871437B (en) | 2022-05-27 |
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| CN105268560A (en) * | 2015-11-13 | 2016-01-27 | 中蓝连海设计研究院 | Method for simultaneous anti-flotation of carbonate and silicate in phosphorus ore |
| CN110302384A (en) * | 2018-03-20 | 2019-10-08 | 杭州迪斯坦瑞医药技术有限公司 | Composition and its pharmaceutical applications containing dithiocar-bamate and metal ion chelation agent |
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| CN103586137A (en) * | 2013-11-19 | 2014-02-19 | 攀钢集团矿业有限公司 | Flotation recovery method of micro-fine particle ilmenite |
| CN108993766B (en) * | 2018-07-24 | 2020-10-13 | 昆明冶金研究院 | Ore dressing treatment method for weathered ilmenite |
| CN109433406B (en) * | 2018-09-14 | 2021-01-05 | 昆明理工大学 | Method for recovering ultra-fine ilmenite in overflow of inclined plate thickener |
| CN109433407B (en) * | 2018-09-14 | 2020-12-15 | 昆明理工大学 | Method for recovering ultra-fine-grain ilmenite from strong magnetic separation tailings |
| CN110882826B (en) * | 2019-11-25 | 2021-10-22 | 四川龙蟒矿冶有限责任公司 | Method for recovering fine-particle ilmenite from vanadium titano-magnetite titanium-separation total tailings |
| CN111744677B (en) * | 2020-07-02 | 2022-06-17 | 沈阳五寰工程技术有限公司 | Acid pretreatment-flotation separation method for pyroxene type ilmenite |
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| CN105268560A (en) * | 2015-11-13 | 2016-01-27 | 中蓝连海设计研究院 | Method for simultaneous anti-flotation of carbonate and silicate in phosphorus ore |
| CN110302384A (en) * | 2018-03-20 | 2019-10-08 | 杭州迪斯坦瑞医药技术有限公司 | Composition and its pharmaceutical applications containing dithiocar-bamate and metal ion chelation agent |
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