CN113617535B - Flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium and application thereof - Google Patents
Flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium and application thereof Download PDFInfo
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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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 particularly relates to a flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium and application thereof, belonging to the technical field of mineral aggregate flotation, wherein the flotation compound agent comprises the following components in parts by mass: 50-150 parts of activating agent, 60-90 parts of inhibitor, 200-600 parts of desulfuration collecting agent, 200-500 parts of potassium-sodium removal collecting agent, 200-400 parts of decalcification magnesium collecting agent and 40-60 parts of foaming agent, and the flotation mixture is adopted to carry out flotation on the high-sulfur bauxite, so that synchronous desulfuration, potassium removal and decalcification of the high-sulfur bauxite can be realized, and the sulfur content can be reduced to be below 0.1%; caO + MgO is less than or equal to 0.4 percent; k 2 O+Na 2 O≤0.4％。
Description
Technical Field
The invention belongs to the technical field of mineral aggregate flotation, and particularly relates to a flotation compound agent for synchronously desulfurizing, removing potassium, sodium and removing calcium and magnesium and application thereof.
Background
At present, a great deal of experimental research is carried out on the utilization aspect of high-sulfur bauxite, and a great deal of technologies of desulfurization, potassium sodium removal and calcium magnesium removal are developed, but the technical development of synchronous flotation, desulfurization, potassium sodium removal and calcium magnesium removal of the high-sulfur bauxite is carried out, the technical adaptability is improved, and the method has important significance for improving the comprehensive competitiveness of enterprises due to the factors of incomplete impurity removal, narrow product utilization path, low product added value and the like in the impurity removal process of the high-sulfur bauxite.
The research on the ore dressing, desulfuration and quality improvement of the bauxite comprises the following steps: 1. the invention patent application CN109201311A of China is a high-sulfur bauxite desulfurization method, which comprises the steps of crushing and grinding high-sulfur bauxite with the sulfur content of more than 1.3%, and obtaining a coarse-grained aluminum concentrate product and a coarse-grained sulfur concentrate product through desulfurization and flotation, wherein the sulfur content of the sulfur concentrate product is less than 0.5%, the sulfur content of the sulfur concentrate obtained by the method is higher, and the sulfur concentrate enters an aluminum oxide flow path to greatly influence equipment, so that steel equipment in an evaporation and decomposition process is damaged due to corrosion; 2. in the Wulare aluminum plant, washing water is used for carrying out industrial flotation test on the North Douler high-sulfur bauxite, butyl xanthate is selected as a collecting agent for flotation, the sulfur content in raw ore is reduced from 2% to 0.4%, the reagent has a general flotation effect, the sulfur in the high-sulfur ore cannot be reduced to be less than 0.3%, and the influence on the alumina process on equipment is large; the above bauxite desulfurization process cannot remove sulfur to 0.1% and the process cost is high.
The research on the removal of calcium and magnesium from the bauxite ore dressing comprises the following steps: china invention patent application CN110453094A method for removing calcium and magnesium from stone coal vanadium ore, which enables Ca in ore pulp to be removed 2+ And Mg 2+ Dissolving the mixture in a water phase, and after the ventilation is finished, carrying out solid-liquid separation to obtain leaching slag and leaching liquid, wherein the process has a common effect of removing calcium and magnesium ions, and the process has low utilization rate of carbon dioxide, thereby causing waste of a large amount of energy; the process device for removing calcium and magnesium disclosed in the Chinese patent application CN102795719A is arranged in the process device for desalting seawater, the process is complex, the cost of process equipment is high, and the equipment applicability is poor; the calcium and magnesium removal process has complex technical flow, high beneficiation cost caused by application in the beneficiation field, and difficult treatment of process wastewater.
The research on the removal of potassium and sodium in the ore dressing of bauxite comprises the following steps: the Chinese patent application CN111921718A is a flotation method for potassium removal of bauxite containing potassium, the potassium and sodium content in concentrate obtained by the method after potassium and sodium removal is higher than 0.5%, high-content potassium and sodium can form non-alumina substances in the process of calcining alumina, and further the slurry storage period is prolonged, so that the slurry forming performance is deteriorated, and the physical and chemical properties of the product are influenced; a certain potassium-containing ore in Henan adopts a process flow of desliming, magnetic separation and reverse flotation to carry out impurity removal and purification, and main influence factors in the impurity removal and purification are researched. The flotation process is complex, the process flow is long, the equipment cost is high, and the applicability is poor; the above potassium removal or potassium removal process is complicated in mineral separation process.
Disclosure of Invention
The application aims to provide a flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium and application thereof, so as to solve the problem of insufficient utilization of high-sulfur bauxite at present.
The embodiment of the invention provides a flotation compounded agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium, which comprises the following components in parts by mass: 50-150 parts of activating agent, 60-90 parts of inhibitor, 200-600 parts of desulfuration collecting agent, 200-500 parts of potassium-sodium removal collecting agent, 200-400 parts of calcium-magnesium removal collecting agent and 40-60 parts of foaming agent.
Optionally, the desulfurization collector comprises isoamyl xanthate and n-propylthiourea, the mass ratio of the isoamyl xanthate to the n-propylthiourea is 1:1, and the using amount of the desulfurization collector is 200g/t-700g/t.
Optionally, the sodium potassium collector comprises at least one of octadecyl ammonium chloride and 1,3-sodium hydroxydodecyl carboxylate.
Optionally, the decalcified magnesium collector comprises at least one of triacylglycerol unsaturated fatty acid, soap flakes, and capric acid.
Optionally, the activating agent comprises copper sulfate and hydrofluoric acid, and the mass ratio of the copper sulfate to the hydrofluoric acid is 1.5-2.5:1.
optionally, the inhibitor comprises diethylenetriamine and succinic acid, and the mass ratio of the diethylenetriamine to the succinic acid is 0.5-1.5.
Optionally, the foaming agent comprises sodium hexadecyl sulfonate and pine oil, and the mass ratio of the sodium hexadecyl sulfonate to the pine oil is 1.5-2.5:1.
based on the same invention concept, the embodiment of the invention also provides the application of the flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium, wherein the application comprises the step of applying the flotation compound agent to the flotation treatment of the high-sulfur bauxite; the flotation compounded agent comprises the following components in parts by mass: 50-150 parts of activating agent, 60-90 parts of inhibitor, 200-600 parts of desulfuration collecting agent, 200-500 parts of potassium-sodium removal collecting agent, 200-400 parts of calcium-magnesium removal collecting agent and 40-60 parts of foaming agent.
Optionally, the flotation treatment comprises:
grinding the high-sulfur bauxite to obtain ore pulp;
adjusting the pH value of the ore pulp to obtain ore pulp to be floated;
and adding the flotation mixture into the ore pulp to be floated for flotation to obtain sulfur concentrate and aluminum concentrate.
Optionally, by mass, in the ore pulp, 40% -90% of ore with the particle size of less than 200 meshes is contained;
the pH value of the ore pulp to be floated is 7.0-9.0.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium provided by the embodiment of the invention comprises the following components in parts by mass: 50-150 parts of activating agent, 60-90 parts of inhibitor, 200-600 parts of desulfuration collecting agent, 200-500 parts of potassium-sodium removal collecting agent, 200-400 parts of decalcification magnesium collecting agent and 40-60 parts of foaming agent, and the flotation mixture is adopted to carry out flotation on the high-sulfur bauxite, so that synchronous desulfuration, potassium removal and decalcification of the high-sulfur bauxite can be realized, and the sulfur content can be reduced to be below 0.1%; caO + MgO is less than or equal to 0.4 percent; k 2 O+Na 2 O≤0.4％。
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a primary roughing, primary concentrating and primary scavenging process provided by an embodiment of the invention;
FIG. 2 is a flow chart of a once roughing once concentrating twice scavenging process provided by the embodiment of the invention;
fig. 3 is a flow chart of a method provided by an embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment and the like used in the present invention may be commercially available or may be prepared by existing methods.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to a typical embodiment of the invention, a method for synchronously flotation, desulfurization, potassium removal, sodium removal and calcium removal of high-sulfur bauxite is provided, and comprises the following steps:
s1, grinding high-sulfur bauxite to obtain ore pulp;
as an alternative mode, the ore grinding is to grind the high-sulfur bauxite until the total amount of ore with the fineness of less than 200 meshes accounts for 40-90 percent of the total weight of the high-sulfur bauxite.
The reason for controlling the ore with the grain diameter less than 200 meshes to account for 40-90% is to ensure the dissociation of the target mineral monomer, simultaneously reduce the over-grinding phenomenon as much as possible and improve the beneficiation efficiency. S2, adding a pH regulator into the ore pulp after ore grinding to obtain the ore pulp to be floated.
S2, adding a pH regulator into the ore pulp after ore grinding to obtain ore pulp to be floated;
as an alternative embodiment, the pH adjuster is sodium carbonate: sodium hydroxide =1:1, the pH of the pulp to be floated is adjusted to 7.0-9.0.
The pH value of the ore pulp to be floated is controlled to be 7.0-9.0, equipment corrosion exists under the acidic condition, and the adverse effect of influencing the use of subsequent products exists, so the pH value of the ore pulp is selected to be more than or equal to 7.0, when the pH value is more than or equal to 9.0, the activity of diaspore is strong, the floatability is increased, and the subsequent reverse flotation operation is not facilitated, and the pH value of the ore pulp is less than or equal to 9.0.
S3, adding an activating agent, an inhibitor, a desulfurization collecting agent, a potassium removal collecting agent, a decalcification collecting agent and a foaming agent into the ore pulp to be floated to obtain sulfur concentrate and aluminum concentrate;
as an alternative embodiment, the activator is copper sulfate: hydrofluoric acid =1.5-2.5:1, the preferred proportion is 2:1, and the dosage of the activating agent is 50-150g/t.
Controlling copper sulfate: hydrofluoric acid =1.5-2.5: the reason for 1 is that the iron hydroxide film covering the surface of the pyrite can be effectively destroyed in the range, the activity of the pyrite is enhanced, the floatability of the pyrite is improved, and meanwhile, the introduction of hydrofluoric acid can enhance the hydrophilicity of diaspore and reduce the floatability of the diaspore.
The dosage of the activating agent is controlled to be 50-150g/t, the iron hydroxide film on the surface of the pyrite in the ore cannot be completely destroyed due to the reduction of the dosage of the activating agent, so that the floatability of the pyrite is poor, and when the dosage of the activating agent is too large, hydrofluoric acid is adsorbed on the surface of the aluminosilicate mineral, so that the floatability of potassium-sodium minerals and calcium-magnesium minerals is reduced, and the mineral separation and impurity removal test index is influenced.
As an alternative embodiment, the inhibitor is diethylenetriamine: succinic acid =0.5-1.5, preferably in the ratio 1:1, with an inhibitor dosage of 60-90g/t.
Controlling the mass ratio of diethylenetriamine: the reason for succinic acid =0.5-1.5 is that diethylenetriamine: the succinic acid proportion can effectively inhibit diaspore within the range, the inhibition effect of diaspore is deteriorated when the proportion is higher, and the inhibitor can inhibit aluminosilicate minerals (illite, kaolinite, pyrophyllite and chlorite) in ores when the proportion is lower, so that the beneficiation impurity removal test index is influenced
The reason for controlling the dosage of the inhibitor to be 60-90g/t is that the inhibitor can effectively inhibit diaspore within the range, the inhibiting strength of diaspore is not enough and the inhibiting effect is not good when the dosage is lower, and the aluminosilicate minerals (illite, kaolinite, pyrophyllite and chlorite) in the ore can be inhibited when the dosage is higher, so that the flotation effect is influenced.
As an alternative embodiment, the foaming agent is sodium hexadecylsulfonate: pinitol oil =1.5-2.5:1, preferably in the ratio of 2:1, with a blowing agent dosage of 50g/t.
Controlling sodium hexadecylsulfonate: pinitol oil =1.5-2.5: the reason for 1 is that the foaming property of the sodium hexadecyl sulfonate is slightly weak, the foam viscosity is large, the brittleness of the pine oil is strong, the selectivity is strong, and the foam viscosity and the selectivity are increased due to the over-high proportion of the sodium hexadecyl sulfonate; too large proportion of the pinitol oil can cause the foam to be crisp, and the indexes of potassium, sodium and calcium removal and magnesium removal are poor.
The reason for controlling the consumption of the foaming agent to be 50g/t is that the foam quantity is moderate, the foam viscosity is moderate, and the effects of flotation desulfuration, potassium sodium removal and calcium magnesium removal are good.
As an alternative embodiment, the desulfurization collector used for flotation is isoamyl xanthate (C) 2 -C 8 ) And one or two of n-propylthiourea, and the dosage of the desulfurization collecting agent is 200-600g/t.
The reason for controlling the consumption of the desulfurization collecting agent to be 200-600g/t is that the sulfur content in the aluminum concentrate is higher due to too low consumption of the collecting agent, so that the purpose of the test cannot be achieved, and the impurity inclusion degree in the flotation process is increased due to too high consumption of the collecting agent, so that the mineral separation index and the aluminum oxide recovery rate of the aluminum concentrate are influenced.
As an optional implementation mode, the decalcified magnesium collecting triacylglycerol unsaturated fatty acid, the soap flake and the capric acid used for flotation are in a certain proportion, and the dosage of the decalcified magnesium collecting agent is 200-400g/t.
The reason for controlling the consumption of the decalcified magnesium collecting agent to be 200-400g/t is that the content of calcium and magnesium in the aluminum concentrate is too high due to too low consumption of the collecting agent, so that the purpose of a test cannot be achieved, and the impurity degree in the flotation process is increased due to too high consumption of the collecting agent, so that the beneficiation index and the aluminum oxide recovery rate of the aluminum concentrate are influenced.
As an optional implementation mode, the potassium-sodium removal collector used for flotation is one or two of octadecyl ammonium chloride and 1,3-sodium hydroxydodecyl carboxylate, and the dosage of the potassium-sodium removal collector is 200-500g/t.
The reason for controlling the consumption of the potassium-sodium removing collecting agent to be 200-500g/t is that the potassium-sodium content in the aluminum concentrate is higher due to too low consumption of the collecting agent, the purpose of the test cannot be achieved, and the impurity inclusion degree in the flotation process is increased due to too high consumption of the collecting agent, so that the mineral separation index and the aluminum oxide recovery rate of the aluminum concentrate are influenced.
The addition of regulator, activator and inhibitor can effectively enhance the surface hydrophobicity of minerals such as pyrite, illite, calcite and dolomite, and inhibit the activity of diaspore.
Meanwhile, the collecting agent is added to realize the synergistic collection of pyrite, illite, calcite and dolomite, the pyrite, the illite, the calcite and the dolomite float up along with the foam product as tailings, and the diasporite concentrate is retained in the ore pulp to realize the synchronous desulfurization, potassium removal, sodium removal and calcium removal of the high-sulfur bauxite.
The obtained aluminum concentrate is suitable for producing homogenized materials and producing aluminum oxide by a Bayer process, and the aim of economically and efficiently utilizing the high-sulfur bauxite is fulfilled.
By adopting the method, the desulfurization, the potassium removal, the sodium removal, the calcium removal and the magnesium removal can be synchronously realized, and the sulfur content in the aluminum concentrate is reduced to be below 0.1 percent; caO + MgO is less than or equal to 0.4 percent; k is 2 O+Na 2 The mechanism that O is less than or equal to 0.4 percent is as follows: the molecular structure of the flotation collector used at present mainly consists of a polar group (mineral affinity group) and a non-polar group (hydrocarbon group), when the collector with the heteropolar structure is acted in an aqueous solution, the mineral affinity group and the flotation mineral are acted and adsorbed on the surface of the mineral, and the hydrophobic hydrocarbon group faces outwards to make the surface of the mineral hydrophobic, so that the mineral is captured by bubbles and floats upwards.
The flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium and the application thereof are explained in detail by combining the examples, the comparative examples and the experimental data.
Example 1
High sulfur bauxite of Guizhou somewhere, in which Al 2 O 3 The content of 68.78% of SiO 2 8.73% of Fe 2 O 3 The content is 3.88%, the S content is 3.59%, and CaO + MgO =1.27%; k 2 O+Na 2 O =0.89%, and the process flow of FIG. 1 is adopted to carry out synchronous flotation, desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test research, and the grinding fineness (-0.074 mm size fraction content) is 80%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 150g/t; inhibitor diethylenetriamine: succinic acid (1:1) with the dosage of 70g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collecting agent is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 400g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: soap flakes: capric acid (1; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3 sodium hydroxydodecyl carboxylate (1:1) in an amount of 200g/t. The sulfur content of the obtained aluminum concentrate is 0.09%, the iron oxide content is 0.11%, the alumina content is 76.33%, and CaO + MgO =0.35%; k 2 O+Na 2 O＝0.39％。
Example 2
High sulfur bauxite of Guizhou somewhere, in which Al 2 O 3 The content of 68.11% of SiO 2 Content of 7.69% Fe 2 O 3 4.11% of the total, 4.03% of S, caO + MgO =1.21%; k 2 O+Na 2 O =0.83%, and the process flow of FIG. 1 is adopted to carry out synchronous flotation, desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test research, and the grinding fineness (-0.074 mm size fraction content) is 70%; sodium carbonate for pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 150g/t; inhibitor diethylenetriamine: succinic acid (1:1) in an amount of 60g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collecting agent is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 400g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: soap flakes (1:2) in an amount of 300g/t; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3-HydroxydodecylCarboxylic acidSodium (1:1) in an amount of 400g/t. The sulfur content of the obtained aluminum concentrate is 0.08%, the iron oxide content is 0.12%, the aluminum oxide content is 77.42%, and CaO + MgO =0.38%; k 2 O+Na 2 O＝0.32％。
Example 3
High sulfur bauxite of Guizhou somewhere, in which Al 2 O 3 The content of 69.12%, siO 2 6.99% of Fe 2 O 3 4.02% in content, 3.88% in content of S, caO + MgO =0.89%; k 2 O+Na 2 O =0.81%, and the process flow of FIG. 1 is adopted to carry out synchronous flotation, desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test research, so that the grinding fineness (-0.074 mm size fraction content) is 70%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 100g/t; inhibitor diethylenetriamine: succinic acid (1:1) with the dosage of 70g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collecting agent is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 600g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: soap flakes: decanoic acid (1; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3 sodium hydroxydodecyl carboxylate (1:1) in an amount of 300g/t. The sulfur content of the obtained aluminum concentrate is 0.08%, the iron oxide content is 0.93%, the aluminum oxide content is 76.11%, and CaO + MgO =0.36%; k 2 O+Na 2 O＝0.34％。
Example 4
High sulfur bauxite of some place in Henan, where Al is contained 2 O 3 The content of 66.92% of SiO 2 Content of 7.19% Fe 2 O 3 Content 4.14%, S content 3.91%, caO + MgO =1.09%; k 2 O+Na 2 O =1.12%, and the process flow of figure 2 is adopted to carry out synchronous flotation, desulfurization, potassium, sodium, calcium and magnesium removal test research, wherein the grinding fineness (-0.074 mm size fraction content) is 70%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 100g/t; inhibitor diethylenetriamine: succinic acid (1:1) with the dosage of 70g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collecting agent is isoamyl xanthate:n-propylthiourea (1:1) in an amount of 300g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: capric acid (1:1) in an amount of 200g/t; the potassium-sodium removing collector is 1,3-sodium hydroxydodecyl carboxylate, and the dosage is 200g/t. The sulfur content in the obtained aluminum concentrate is 0.092%, the iron oxide content is 1.01%, the alumina content is 78.59%, and CaO + MgO =0.31%; k 2 O+Na 2 O＝0.32％。
Example 5
High sulfur bauxite of some place in Henan, where Al is contained 2 O 3 The content of 65.88% of SiO 2 6.19% of Fe 2 O 3 5.03% of S, 3.56% of CaO + MgO =0.93%; k 2 O+Na 2 O =0.77%, and the process flow shown in figure 2 is adopted to carry out synchronous flotation, desulfurization, potassium, sodium, calcium and magnesium removal test research, wherein the grinding fineness (-0.074 mm size fraction content) is 80%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 150g/t; inhibitor diethylenetriamine: succinic acid (1:1) with the dosage of 90g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collector is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 400g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: capric acid (2:1) in an amount of 300g/t; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3 sodium hydroxydodecyl carboxylate (1:1) in an amount of 300g/t. The sulfur content of the obtained aluminum concentrate is 0.07 percent, the iron oxide content is 1.13 percent, and CaO + MgO =0.29 percent; k 2 O+Na 2 O＝0.3％。
Comparative example 1
Comparative example 1a simultaneous flotation desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test study was carried out on a certain high-sulfur bauxite in Guizhou using the ore in example 1 and the process flow of FIG. 1, wherein Al 2 O 3 The content of 68.78% of SiO 2 8.73% of Fe 2 O 3 The content is 3.88%, the S content is 3.59%, and CaO + MgO =1.27%; k 2 O+Na 2 O =0.89%, and the grinding fineness (-0.074 mm fraction content) is 80%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2),the dosage is 150g/t; inhibitor diethylenetriamine: succinic acid (1:1) with the dosage of 70g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 30g/t; the desulfurization collecting agent is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 400g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: soap flakes: capric acid (1; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3 sodium hydroxydodecyl carboxylate (1:1) in an amount of 200g/t. The sulfur content of the obtained aluminum concentrate is 0.21%, the iron oxide content is 0.88%, the alumina content is 70.13%, and CaO + MgO =0.51%; k 2 O+Na 2 O＝0.48％。
Comparative example 2
Comparative example 2 a simultaneous flotation, desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test study was conducted on a high-sulfur bauxite in a certain place in Guizhou using the ore of example 4 and the process flow of FIG. 2, wherein Al 2 O 3 The content of 66.92% of SiO 2 Content of 7.19% Fe 2 O 3 Content 4.14%, S content 3.91%, caO + MgO =1.09%; k is 2 O+Na 2 O =1.12%, and the process flow of figure 2 is adopted to carry out synchronous flotation, desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test research, and the grinding fineness (-0.074 mm size fraction content) is 70%; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =8.5; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 100g/t; inhibitor diethylenetriamine: succinic acid (1:1) in an amount of 70g/t; foaming agent sodium hexadecylsulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collecting agent is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 100g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: capric acid (1:1) in an amount of 200g/t; the potassium-sodium removing collector is 1,3-sodium hydroxydodecyl carboxylate, and the dosage is 200g/t. The sulfur content in the obtained aluminum concentrate is 0.28%, the iron oxide content is 1.05%, the aluminum oxide content is 75.19%, and CaO + MgO =0.38%; k 2 O+Na 2 O＝0.4％。
Comparative example 3
Comparative example 3 the ore of example 5 was used, and the process flow of fig. 2 was used to conduct a simultaneous flotation desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal test study on a high-sulfur bauxite in some of Henan, wherein Al is 2 O 3 The content of 65.88% of SiO 2 6.19% Fe 2 O 3 5.03 percent of S and 3.56 percent of S, and the grinding fineness (-0.074 mm size fraction content) is 80 percent by carrying out synchronous flotation, desulfurization, potassium, sodium, decalcification and magnesium removal test research; sodium carbonate as a pH adjuster: sodium hydroxide (1:1) to adjust pulp pH =11; activating agent copper sulfate: hydrofluoric acid (1:2) in an amount of 150g/t; inhibitor diethylenetriamine: succinic acid (1:1) with a dosage of 90g/t; foaming agent sodium hexadecyl sulfonate: pinitol oil (2:1) in an amount of 50g/t; the desulfurization collector is isoamyl xanthate: n-propylthiourea (1:1) in an amount of 400g/t; the decalcified magnesium collecting agent is triacylglycerol unsaturated fatty acid: capric acid (2:1) in an amount of 300g/t; the potassium-sodium removing collector is octadecyl ammonium chloride: 1,3 sodium hydroxydodecyl carboxylate (1:1) in an amount of 300g/t. The sulfur content of the obtained aluminum concentrate is 0.13%, the iron oxide content is 0.37%, the aluminum oxide content is 75.11%, and CaO + MgO =0.47%; k 2 O+Na 2 O＝0.44％。
Examples of the experiments
The aluminum concentrates obtained in examples 1 to 5 and comparative examples 1 to N were examined and the results are shown in the following table:
the method can obtain that the sulfur content in the aluminum concentrate floated by the method provided by the embodiment of the invention is less than or equal to 0.1 percent; caO + MgO is less than or equal to 0.4 percent; k is 2 O+Na 2 O≤0.4％，Al 2 O 3 The content is more than or equal to 75 percent, and can be obtained by comparing the data of the comparative example and the example:
as can be seen from comparison of the experimental conditions and experimental data in comparative example 1 and example 1, when the amount of frother used (frother =30 g/t) is less than 50g/t in the present application, floatability of pyrite is affected, flotation froth is low, sulfur content of aluminum concentrate is increased, sulfur content of the obtained aluminum concentrate is 0.21%, iron oxide content is 0.88%, alumina content is 70.13%, caO + MgO =0.51%; k 2 O+Na 2 O＝0.48％。
From the test conditions and tests in comparative example 2 and example 4The comparison of experimental data shows that when the dosage of the desulfurization collecting agent is lower than the range of 200-700g/t, the floatability of the pyrite is affected, the sulfur content of the aluminum concentrate is higher, the sulfur content of the obtained aluminum concentrate is 0.28%, the iron oxide content is 1.05%, and CaO + MgO =0.38%; k 2 O+Na 2 O =0.4%, the sulphur content in the concentrate exceeds the standard.
As can be seen from comparison of the test conditions and test data in comparative example 3 and example 5, when the pH (pH = 11) is higher than the range of 7.0 to 9.0 in the present application, the floatability of pyrite is affected, the flotation froth is more viscous, the flotation process is heavily entrained, and the resulting aluminum concentrate has a sulfur content of 0.13%, an iron oxide content of 0.37%, and CaO + MgO =0.47%; k 2 O+Na 2 O =0.44%, and sulfur, potassium, sodium, calcium and magnesium in the concentrate are all out of standard.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
(1) According to the method provided by the embodiment of the invention, the desulfurization collecting agent, the sodium-potassium-removal collecting agent, the decalcification magnesium collecting agent, the regulator, the activator and the inhibitor are added to perform flotation, desulfurization, decalcification, and magnesium removal simultaneously, so that gangue minerals such as sulfur-containing pyrite, illite, calcite and dolomite float upwards as foam products, and a target mineral aluminum mineral is kept in ore pulp to realize synchronous desulfurization, decalcification, and magnesium removal of high-sulfur bauxite, so that aluminum concentrate with low impurity content and high alumina content is obtained, and the aluminum concentrate is suitable for producing homogenized materials and producing alumina by a Bayer process;
(2) The method provided by the embodiment of the invention can realize synchronous desulfurization, potassium removal and decalcification of the high-sulfur bauxite, and the sulfur content in the aluminum concentrate after flotation is as low as below 0.1%; caO + MgO is less than or equal to 0.4 percent; k 2 O+Na 2 O≤0.4％；
(3) The method provided by the embodiment of the invention can be used for carrying out adaptive adjustment according to different properties and characteristics of bauxite in various regions, thus being capable of carrying out industrial popularization in low-quality bauxite regions.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium is characterized by comprising the following components in parts by mass: 50-150 parts of an activating agent, 60-90 parts of an inhibitor, 200-600 parts of a desulfuration collecting agent, 200-500 parts of a potassium-sodium removal collecting agent, 200-400 parts of a calcium-magnesium removal collecting agent and 40-60 parts of a foaming agent; the desulfurization collecting agent comprises isoamyl xanthate and n-propyl thiourea, the mass ratio of the isoamyl xanthate to the n-propyl thiourea is 1:1, and the using amount of the desulfurization collecting agent is 200g/t-700g/t;
the potassium-sodium removing collector comprises at least one of octadecyl ammonium chloride and 1,3-sodium hydroxydodecyl carboxylate;
the decalcified magnesium collector comprises at least one of triacylglycerol unsaturated fatty acid, soap flakes and capric acid;
the activating agent comprises copper sulfate and hydrofluoric acid, and the mass ratio of the copper sulfate to the hydrofluoric acid is 1.5-2.5:1;
the inhibitor comprises diethylenetriamine and succinic acid, and the mass ratio of the diethylenetriamine to the succinic acid is 0.5-1.5;
the foaming agent comprises sodium hexadecyl sulfonate and pine oil, wherein the mass ratio of the sodium hexadecyl sulfonate to the pine oil is 1.5-2.5:1.
2. the use of the simultaneous desulfurization, potassium removal, sodium removal, calcium removal, and magnesium removal flotation combination according to claim 1, wherein the use comprises using the flotation combination in the flotation treatment of high sulfur bauxite.
3. The use of the flotation compounded agent for simultaneous desulfurization, potassium removal, sodium removal, calcium removal and magnesium removal according to claim 2, wherein the flotation treatment comprises:
grinding the high-sulfur bauxite to obtain ore pulp;
adjusting the pH of the ore pulp to obtain ore pulp to be floated;
and adding the flotation mixture into the ore pulp to be floated for flotation to obtain sulfur concentrate and aluminum concentrate.
4. The application of the flotation compound agent for synchronously desulfurizing, removing potassium, sodium, calcium and magnesium according to claim 3 is characterized in that ore with the particle size of less than 200 meshes accounts for 40-90% by mass of the ore pulp;
the pH value of the ore pulp to be floated is 7.0-9.0.
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