CN110976098A - Scheelite flotation method - Google Patents
Scheelite flotation method Download PDFInfo
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- CN110976098A CN110976098A CN201911124347.6A CN201911124347A CN110976098A CN 110976098 A CN110976098 A CN 110976098A CN 201911124347 A CN201911124347 A CN 201911124347A CN 110976098 A CN110976098 A CN 110976098A
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
Abstract
The invention provides a scheelite flotation method, wherein a composition of lignocellulose intercalation modified montmorillonite and carboxymethyl cellulose with a mass ratio of 70: 30-85: 15 is selected as an inhibitor, and when the addition amount of the inhibitor is 300-500 g/t, flotation at normal temperature can be realized, and the recovery rate and grade of obtained concentrate are remarkably improved compared with a flotation method using water glass as the inhibitor. The lignocellulose intercalation modified montmorillonite is prepared by slowly adding montmorillonite suspension into lignocellulose suspension and reacting at a constant temperature of 50-70 ℃. The montmorillonite modified by the lignocellulose intercalation has strong adsorbability and dispersibility, has strong inhibiting effect on gangue minerals, has weak adsorption effect on scheelite, and the carboxymethyl cellulose further strengthens the selectivity and inhibiting effect of an inhibitor, so that the flotation separation at normal temperature is realized, and the energy consumption and the cost are reduced.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to a scheelite flotation method.
Background
Tungsten is a typical rare metal and also an important strategic metal, and is widely used in the fields of military industry, hard alloy manufacturing, communication technology, electronic computers, aerospace, photosensitive materials and the like due to the characteristics of high hardness, extremely high melting point, good chemical stability and the like. China has abundant tungsten mineral resources, the available ore species are mainly wolframite and scheelite, the reserves are at the top of the world, and the unique resource advantage is established for the development of the tungsten industry in China. The scheelite reserves account for about 70 percent of the tungsten reserves in China, the resources are rich, but the grades are low, the symbiosis is complex, and the requirements on the selection are high. Because the physical chemistry of the scheelite is different from that of the wolframite, the flotation separation is the best sorting method for sorting the scheelite and is one of the most studied methods at home and abroad. Therefore, the research of the scheelite flotation technology is also one of the research focuses of the miners.
Scheelite has good floatability, and the flotation process is complicated by the existence of calcium-containing gangue minerals with similar properties, such as calcite, fluorite, apatite, etc., in the ore. In order to improve the selectivity of the flotation process, a collector with better selectivity and an inhibitor with stronger inhibition are added, the inhibitor is adsorbed on the surface of the gangue mineral through the strong water absorption of the inhibitor so that the gangue mineral has hydrophilicity and obtains an inhibition effect, the inhibitor is hardly adsorbed on the surface of the scheelite, the collector is mainly adsorbed, the surface hydrophobic property is increased, and therefore the separation of the scheelite and the gangue mineral is realized. Therefore, the choice of collector and inhibitor is particularly important. The inhibitor which is most widely applied at present is water glass. In an actual scheelite flotation system, to realize effective inhibition of gangue minerals, a large amount of water glass needs to be added in the flotation process to realize inhibition of gangue minerals.
However, the selectivity of water glass is poor, a large amount of water glass can inhibit scheelite to a certain extent, the flotation recovery of the scheelite is deteriorated, and the water glass is easily polluted by excessive use of the water glass. To overcome this problem, Cu may be added2+、Pb2+The equal-heavy metal ions activate the floatability of the scheelite and strengthen the action of the collecting agent, thereby improving the ore dressing recovery effect, reducing the using amount of water glass to a certain extent and improving the selectivity of the flotation process; however, the addition of heavy metal ions not only greatly increases the beneficiation cost, but also easily causes serious environmental pollution. In addition, the separation effect of the scheelite and the gangue containing calcium can be improved by a heating method, the method is to react with a large amount of water glass before the scheelite rough concentrate is selected, and then the ore pulp is heated to 90 ℃ and stirred for 1 hour under the condition of heat preservation, so that the collecting agent adsorbed on the surface of the gangue is preferentially dissociated, and the recovery effect of the scheelite is improved. However, the heating process has great operation difficulty, and greatly increases the complexity and energy consumption of the beneficiation process.
Therefore, in order to overcome the defects of complex process, low scheelite recovery rate and the like of the traditional scheelite flotation separation process, the traditional scheelite suppressor has the defects of poor selectivity, environmental friendliness and the like, and the gangue mineral suppressor which is good in environmental protection, strong in suppression effect and good in selectivity is sought, so that the method is an urgent need for scheelite separation at present and has important significance for improving the scheelite resource utilization level in China.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a scheelite flotation method, a composition of lignocellulose intercalation modified montmorillonite and carboxymethyl cellulose is selected as an inhibitor, the lignocellulose intercalation modified montmorillonite has strong adsorbability and dispersion capacity and strong inhibition effect on gangue minerals, and the carboxymethyl cellulose further strengthens the selectivity and inhibition effect, so that flotation separation at normal temperature is realized, and the recovery rate and the grade are both obviously improved compared with those of conventional inhibitors.
In order to achieve the purpose, the invention adopts the following technical scheme:
a scheelite flotation method comprises the following steps:
s1, grinding and desliming scheelite to obtain pre-selected mineral powder with the particle size of-76 microns +10 microns;
s2, adding water into the pre-selected mineral powder, and adjusting ore pulp to the mass concentration of 450-550 g/L to obtain pre-selected ore pulp;
s3, adding a pH regulator into the pre-selected ore pulp, and adjusting the pH value of the pre-selected ore pulp to 8.5-10;
s4, adding an inhibitor into the step S3, adding a collecting agent after uniformly stirring, and performing flotation separation at normal temperature to obtain tungsten concentrate;
the inhibitor is a composition of intercalated modified montmorillonite and carboxymethyl cellulose.
Further, in step S4, the addition amount of the inhibitor is 300 to 500 g/t.
Further, in step S4, the mass ratio of the intercalated modified montmorillonite to the carboxymethyl cellulose is 70:30 to 85:15, and the particle size of the intercalated modified montmorillonite is 100 to 300 nm.
Further, in step S4, the intercalated modified montmorillonite is a lignocellulose intercalated modified montmorillonite.
Further, the preparation method of the lignocellulose intercalated modified montmorillonite comprises the following steps:
s401, adding lignocellulose into a NaOH solution, and performing ultrasonic dispersion to obtain a lignocellulose suspension;
s402, montmorillonite is dissolved in deionized water, and ultrasonic dispersion is carried out to obtain montmorillonite suspension;
s403, slowly adding the montmorillonite suspension into the lignocellulose suspension, reacting at a constant temperature of 50-70 ℃ for 4-8 h, then centrifugally separating, washing to be neutral, and drying to obtain the lignocellulose intercalation modified montmorillonite.
Further, in step S401, the mass concentration of the NaOH solution is 20 wt%, and the mass concentration of the lignocellulose is 30-50 g/L.
Further, in step S402, the mass concentration of the montmorillonite is 30 to 50g/L, and the mass concentration of the montmorillonite is the same as the mass concentration of the lignocellulose.
Further, in step S403, the montmorillonite suspension and the lignocellulose suspension have the same volume.
Further, in step S3, the PH adjusting agent is sodium hydroxide or sodium carbonate.
Further, in step S4, the collecting agent is one of octyl hydroximic acid, benzohydroxamic acid and naphthalimic acid, and the addition amount of the collecting agent is 1.1 to 1.5 kg/t.
Advantageous effects
Compared with the prior art, the scheelite flotation method provided by the invention has the following beneficial effects:
(1) the composition of the lignocellulose intercalation modified montmorillonite and the carboxymethyl cellulose is selected as an inhibitor, the lignocellulose intercalation modified montmorillonite has strong adsorbability and dispersion capacity, can be adsorbed on the surface of gangue mineral particles, improves the surface hydrophilicity to obtain a strong inhibition effect, and the carboxymethyl cellulose further strengthens the selectivity and the inhibition effect; hydroximic acid collecting agents adsorb the surface of scheelite particles, the surface hydrophobicity of the scheelite particles is improved, and the scheelite particles and gangue minerals are successfully separated through stirring and dispersion, so that flotation separation at normal temperature is realized, and the recovery rate and grade of the obtained scheelite concentrate are remarkably improved compared with those of conventional inhibitors.
(2) The invention selects a composition of lignocellulose intercalation modified montmorillonite and carboxymethyl cellulose with a mass ratio of 70: 30-85: 15 as an inhibitor, wherein the main component is the lignocellulose intercalation modified montmorillonite, the montmorillonite is a soil-like mineral formed by stacking nanometer-thickness silicate sheets with negative electricity on the surfaces by virtue of interlayer electrostatic action, and a unit cell in a crystal structure of the montmorillonite is formed by sandwiching a layer of aluminum oxygen octahedron between two layers of silicon oxygen tetrahedrons. The montmorillonite has a unique one-dimensional layered nano structure and cation exchange property, and has strong adsorption capacity and good dispersion performance. The invention further improves the adsorption capacity of the montmorillonite to the gangue minerals after the intercalation modification of the montmorillonite by the lignocellulose, and the metal cations among the montmorillonite layers can improve the adsorption capacity and the adsorption stability of the montmorillonite to the gangue mineral particles.
(3) The method selects lignocellulose intercalation modified montmorillonite with the particle size of 100-300 nm as a main inhibitor, the montmorillonite with small particle size has a micro-nano size effect, the modified montmorillonite is not easy to agglomerate, and after the montmorillonite is adsorbed on the surface of gangue minerals, the particle size of the gangue mineral particles is increased, so that the montmorillonite is easier to sink to the bottom of ore pulp, and the separation effect is improved.
(4) The preparation method of the lignocellulose intercalation modified montmorillonite provided by the invention is simple, the preparation conditions are mild, the raw material sources are rich, the montmorillonite is used as an inhibitor, the normal-temperature flotation of scheelite can be realized, the separation cost is obviously reduced, and the montmorillonite is environment-friendly, nontoxic and harmless.
Drawings
FIG. 1 is a schematic flow chart of a scheelite flotation method provided by the invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The traditional scheelite flotation multi-selection uses water glass as a flotation inhibitor, the water glass is water-soluble silicate, and the water glass inhibits gangue minerals from being HSiO3 -And H2SiO3As a result of the action of the two, they both have strong water absorbability due to adsorption of HSiO on the surface of scheelite and gangue minerals3 -And H2SiO3The two substances have different abilities, and the two substances are adsorbed on the surface of the gangue mineral to ensure that the gangue mineral has hydrophilicity and obtains a suppression effect, while the surface adsorption amount of the scheelite is little or almost no. Based on the method, the montmorillonite with a layered structure is selected as a matrix, and after the montmorillonite is subjected to intercalation modification by lignocellulose, the agglomeration among particles is reduced, and the montmorillonite is used together with the carboxymethyl cellulose, so that the synergistic inhibition effect is improved, and the efficient flotation at normal temperature is realized.
Referring to fig. 1, the scheelite flotation method provided in the present invention includes the following steps:
s1, grinding and desliming scheelite to obtain pre-selected mineral powder with the particle size of-76 microns +10 microns;
s2, adding water into the pre-selected mineral powder, and adjusting ore pulp to the mass concentration of 450-550 g/L to obtain pre-selected ore pulp;
s3, adding a pH regulator into the pre-selected ore pulp, and adjusting the pH value of the pre-selected ore pulp to 8.5-10;
s4, adding 300-500 g/t of inhibitor into the step S3, adding a collecting agent after uniformly stirring, and performing flotation separation to obtain tungsten concentrate;
the inhibitor is a composition of intercalated modified montmorillonite and carboxymethyl cellulose in a mass ratio of 70: 30-85: 15, and the particle size of the intercalated modified montmorillonite is 100-300 nm.
The intercalation modified montmorillonite is lignocellulose intercalation modified montmorillonite, and is prepared by the following method:
s401, adding lignocellulose into a NaOH solution, and performing ultrasonic dispersion to obtain a lignocellulose suspension liquid with the mass concentration of 30-50 g/L;
s402, montmorillonite is dissolved in deionized water, and ultrasonic dispersion is carried out to obtain montmorillonite suspension with the mass concentration of 30-50 g/L;
s403, slowly adding the montmorillonite suspension with the same volume into the lignocellulose suspension, reacting for 48 hours at a constant temperature of 50-70 ℃, then performing centrifugal separation, washing to be neutral, and drying to obtain the cellulose intercalation modified montmorillonite.
Preferably, the pH regulator is sodium hydroxide or sodium carbonate.
Preferably, the collecting agent is one of octyl hydroximic acid, benzohydroxamic acid and naphthalimic acid, and the addition amount of the collecting agent is 1.1-1.5 kg/t.
By the method, under the strong adsorption and dispersion effects of the lignocellulose intercalation modified montmorillonite, the recovery rate and the grade of scheelite concentrate obtained by flotation are remarkably improved.
Example 1
The scheelite flotation method provided in embodiment 1 selects a certain low-grade scheelite in shanxi with a raw ore grade of 1.36% as an ore sample for flotation, and specifically includes the following steps:
s1, grinding and desliming scheelite to obtain pre-selected mineral powder with the particle size of-76 microns +10 microns;
s2, adding water into the pre-selected mineral powder, and adjusting ore pulp to the mass concentration of 500g/L to obtain pre-selected ore pulp;
s3, adding sodium hydroxide into the pre-selected ore pulp, and adjusting the pH value of the pre-selected ore pulp to 9.5;
s4, adding 400g/t of inhibitor into the step S3, adding 1.2kg/t of benzohydroxamic acid after uniformly stirring, and performing flotation separation at normal temperature to obtain tungsten concentrate and tailings.
Wherein the inhibitor is a composition of lignocellulose intercalation modified montmorillonite and carboxymethyl cellulose with a mass ratio of 75: 25.
The lignocellulose intercalation modified montmorillonite is prepared by the following method:
s401, adding lignocellulose into a NaOH solution with the mass fraction of 20%, and performing ultrasonic dispersion to obtain a lignocellulose suspension with the mass concentration of 40 g/L;
s402, montmorillonite is dissolved in deionized water, and ultrasonic dispersion is carried out to obtain montmorillonite suspension with the mass concentration of 40 g/L;
s403, slowly adding the montmorillonite suspension with the same volume into the lignocellulose suspension, reacting for 5 hours at a constant temperature of 60 ℃, then performing centrifugal separation, washing with deionized water to be neutral, and drying to obtain the lignocellulose intercalation modified montmorillonite with the particle size of about 200 nm.
WO in scheelite concentrate obtained in this example3The grade of the crude ore is increased from 0.36 percent to 53.8 percent, and the recovery rate reaches 88.6 percent. Compared with the traditional flotation method using water glass as a main inhibitor, the recovery rate and the grade are both obviously improved, and the invention adopts normal-temperature flotation, so that the energy consumption is obviously reduced.
Examples 2 to 7
Compared with the flotation method of scheelite provided in the embodiments 2 to 7, the difference between the flotation method of scheelite provided in the embodiments 1 is that the particle size of the lignocellulose intercalation modified montmorillonite, the mass ratio of the lignocellulose intercalation modified montmorillonite to the carboxymethyl cellulose, and the addition amount of the lignocellulose intercalation modified montmorillonite are shown in table 1, and the rest are substantially the same as those in the embodiment 1, and are not repeated herein.
Comparative examples 1 to 6
Compared with the flotation method of scheelite provided in the comparative examples 1 to 6, the difference is that the particle size of the lignocellulose intercalation modified montmorillonite, the mass ratio of the lignocellulose intercalation modified montmorillonite to the carboxymethyl cellulose, and the addition amount are shown in table 1, and the rest are basically the same as those in the example 1, and are not repeated herein.
TABLE 1 test results of preparation conditions, recovery rates and grades of examples 2 to 7 and comparative examples 1 to 6
As can be seen from table 1, as the addition amount of the inhibitor increases, the recovery rate and grade of tungsten in the scheelite concentrate increase first and then decrease slowly, which indicates that when the addition amount of the inhibitor is too small, the optimal flotation effect is difficult to achieve; when the addition amount of the inhibitor is increased, the recovery rate and the grade of tungsten are not increased any more, but are slowly reduced, probably because excessive montmorillonite is easy to agglomerate among molecules, and the inhibition effect is reduced. Therefore, from the viewpoint of the flotation cost and the flotation effect, the addition amount of the inhibitor is preferably 400 g/t. Along with the increase of the mass ratio of the lignocellulose intercalation modified montmorillonite to the carboxymethyl cellulose, the recovery rate and the grade of tungsten are increased and then reduced, and when the mass ratio is higher than 70:30 or lower than 85:15, the recovery rate and the grade of tungsten are both obviously reduced. The reason is that when the addition amount of the lignocellulose intercalation modified montmorillonite is too much, agglomeration among particles is enhanced, and the adsorption inhibition effect is reduced, and when the addition amount is too low, the adsorption inhibition effect of the lignocellulose intercalation modified montmorillonite cannot be completely reflected, so the mass ratio of the lignocellulose intercalation modified montmorillonite to the carboxymethyl cellulose is preferably 70: 30-85: 15. The recovery rate and grade of tungsten gradually decrease with the increase of the particle size of the lignocellulose intercalation modified montmorillonite, because when the particle size is too large, the dispersibility and adsorptivity of the montmorillonite are poor, resulting in a decrease of the inhibition effect, and therefore the particle size is preferably 100 to 300 nm.
Examples 8 to 13
Examples 8 to 13 are different from example 1 in that the preparation conditions of the lignocellulose intercalated modified montmorillonite are shown in table 2, and other conditions are substantially the same as the facts, and are not repeated herein.
Table 2 test results of preparation conditions, recovery rates and grades in examples 8 to 13
As can be seen from table 2, when the mass concentration of lignocellulose and montmorillonite is too high, the recovery rate and grade of tungsten are reduced, which is probably because when the mass concentration of lignocellulose and montmorillonite is too high, the dispersion of both is not facilitated, the intercalation modification rate is reduced, and the adsorption inhibition effect of montmorillonite is reduced. When the reaction temperature is 50 ℃, the recovery rate and the grade of tungsten are also reduced, which shows that the proper intercalation modification temperature is favorable for improving the modification of the lignocellulose on the montmorillonite. Within the limit of the invention, the reaction time has little influence on the recovery rate and the grade of the tungsten.
Comparative example 7
Comparative example 7 is different from example 1 in that the inhibitor added in step S4 is a composition of unmodified montmorillonite and carboxymethyl cellulose in a mass ratio of 75:25, and the rest is basically the same as example 1 and is not repeated herein.
The test result shows that the recovery rate of the scheelite concentrate obtained in the comparative example 7 is reduced to 80.6%, the grade is reduced to 47.8%, and the result shows that the intercalation modification of the wood fiber is beneficial to weakening the agglomeration among montmorillonite particles, and the interlayer spacing is increased after the intercalation modification, so that the adsorption quantity of the montmorillonite to the gangue minerals can be increased, the dispersion uniformity and the adsorption uniformity are improved, and the adsorption inhibition effect is further improved.
Comparative example 8
Comparative example 8 is different from example 1 in that the inhibitor added in step S4 is a composition of water glass and carboxymethyl cellulose with a mass ratio of 75:25, and the rest is basically the same as example 1 and is not repeated herein.
The recovery rate of the scheelite concentrate obtained by the flotation of the comparative example 8 is reduced to 76.5%, the grade is reduced to 43.2%, and the recovery rate is obviously reduced compared with that of the scheelite concentrate obtained by the flotation of the example 1 and the comparative example 5. The advantage of using the wood fiber modified montmorillonite as the main inhibitor is further proved by the invention, because the wood fiber modified montmorillonite has better adsorbability and hydrophilicity than water glass, and has cation exchange performance, and the wood fiber modified montmorillonite is adsorbed on the surface of the gangue mineral in the form of particles, so that the hydrophilicity of the gangue mineral particles is increased, and meanwhile, the sinking property of the gangue mineral particles is also increased, thereby effectively separating the gangue mineral from the scheelite, and realizing the flotation separation of the scheelite at normal temperature.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A scheelite flotation method is characterized by comprising the following steps:
s1, grinding and desliming scheelite to obtain pre-selected mineral powder with the particle size of-76 microns +10 microns;
s2, adding water into the pre-selected mineral powder, and adjusting ore pulp to the mass concentration of 450-550 g/L to obtain pre-selected ore pulp;
s3, adding a pH regulator into the pre-selected ore pulp, and adjusting the pH value of the pre-selected ore pulp to 8.5-10;
s4, adding an inhibitor into the step S3, adding a collecting agent after uniformly stirring, and performing flotation separation at normal temperature to obtain tungsten concentrate;
the inhibitor is a composition of intercalated modified montmorillonite and carboxymethyl cellulose.
2. The scheelite flotation method according to claim 1, wherein the depressor is added in an amount of 300 to 500g/t in step S4.
3. The scheelite flotation method according to claim 1, wherein in step S4, the mass ratio of the intercalated modified montmorillonite to the carboxymethyl cellulose is 70:30 to 85:15, and the particle size of the intercalated modified montmorillonite is 100 to 300 nm.
4. The scheelite flotation process according to claim 3, wherein in step S4, the intercalated modified montmorillonite is a lignocellulose intercalated modified montmorillonite.
5. The scheelite flotation method according to claim 4, wherein the preparation method of the lignocellulose intercalated modified montmorillonite comprises the following steps:
s401, adding lignocellulose into a NaOH solution, and performing ultrasonic dispersion to obtain a lignocellulose suspension;
s402, montmorillonite is dissolved in deionized water, and ultrasonic dispersion is carried out to obtain montmorillonite suspension;
s403, slowly adding the montmorillonite suspension into the lignocellulose suspension, reacting at a constant temperature of 50-70 ℃ for 4-8 h, then centrifugally separating, washing to be neutral, and drying to obtain the lignocellulose intercalation modified montmorillonite.
6. The scheelite flotation method according to claim 5, wherein in step S401, the NaOH solution has a mass concentration of 20 wt%, and the lignocellulose has a mass concentration of 30-50 g/L.
7. The scheelite flotation method according to claim 5, wherein in step S402, the mass concentration of the montmorillonite is 30-50 g/L, and the mass concentration of the montmorillonite is the same as the mass concentration of the lignocellulose.
8. The scheelite flotation process according to claim 5, wherein in step S403, the montmorillonite suspension and the lignocellulose suspension have the same volume.
9. The scheelite flotation process according to claim 1, wherein the pH adjusting agent is sodium hydroxide or sodium carbonate in step S3.
10. The scheelite flotation method according to claim 1, wherein in step S4, the collector is one of octyl hydroximic acid, benzohydroxamic acid and naphthalimic acid, and the addition amount of the collector is 1.1-1.5 kg/t.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112676043A (en) * | 2020-12-04 | 2021-04-20 | 江西理工大学 | Method for improving heating flotation effect of scheelite |
| CN114682392A (en) * | 2022-03-29 | 2022-07-01 | 洛阳毅流选矿技术服务有限公司 | Scheelite flotation process for improving tungsten recovery rate |
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| CN114682392A (en) * | 2022-03-29 | 2022-07-01 | 洛阳毅流选矿技术服务有限公司 | Scheelite flotation process for improving tungsten recovery rate |
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