CN114289186A - Magnetite desulfurization method - Google Patents
Magnetite desulfurization method Download PDFInfo
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- CN114289186A CN114289186A CN202111470033.9A CN202111470033A CN114289186A CN 114289186 A CN114289186 A CN 114289186A CN 202111470033 A CN202111470033 A CN 202111470033A CN 114289186 A CN114289186 A CN 114289186A
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- ore pulp
- magnetite
- sulfur
- pyrrhotite
- desulfurization
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 39
- 239000011593 sulfur Substances 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 21
- 238000005188 flotation Methods 0.000 claims abstract description 18
- 239000006185 dispersion Substances 0.000 claims abstract description 11
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 18
- 230000002000 scavenging effect Effects 0.000 claims description 13
- 239000012190 activator Substances 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical group [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 9
- 229910001431 copper ion Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims description 5
- 239000002283 diesel fuel Substances 0.000 claims description 5
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical class CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052952 pyrrhotite Inorganic materials 0.000 abstract description 57
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 230000005389 magnetism Effects 0.000 abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 239000012141 concentrate Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000012795 verification Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000013019 agitation Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001132 ultrasonic dispersion Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- VBIXEXWLHSRNKB-UHFFFAOYSA-N ammonium oxalate Chemical compound [NH4+].[NH4+].[O-]C(=O)C([O-])=O VBIXEXWLHSRNKB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- ROOIMEGRNKABEH-UHFFFAOYSA-M copper(1+);ethoxymethanedithioate Chemical compound [Cu+].CCOC([S-])=S ROOIMEGRNKABEH-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 210000003574 melanophore Anatomy 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
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Abstract
The invention provides a magnetite desulphurization method, which comprises the following steps: adding long-chain alkane into the sulfur-containing magnetite ore pulp with the pH value of 6-7, and performing vibration dispersion treatment on the ore pulp added with the long-chain alkane through ultrasonic waves to obtain first ore pulp; adding an activating agent into the first ore pulp while stirring to activate the first ore pulp to obtain second ore pulp; adding a collecting agent into the second ore pulp while stirring to perform primary collecting treatment on sulfur in the second ore pulp to obtain third ore pulp; and carrying out flotation desulfurization treatment on the third ore pulp to complete desulfurization on the ore pulp containing the sulfur magnetite. The invention can solve the problems that the prior art only depends on a demagnetizer to weaken the magnetic agglomeration of the magnetite and the pyrrhotite, but the magnetite and the pyrrhotite have magnetism, the direct magnetic adhesion of the magnetite and the pyrrhotite still exists, the desulfurization effect is poor, and the like.
Description
Technical Field
The invention relates to the technical field of desulfurization, in particular to a magnetite desulfurization method.
Background
Magnetite is an important mineral raw material in the steel industry. The sulfur content is one of the main standards for measuring the quality of iron ore concentrate, and according to the requirements of steel smelting, the sulfur content in iron ore is increased by 0.1 percent, and the coke ratio is increased by 5 percent. In addition, in the smelting process, part of sulfur is discharged along with furnace gas in the form of harmful gaseous sulfides, which causes harm to human health and surrounding environment. Therefore, the reduction of the sulfur content in the magnetite is beneficial to the steel smelting process and has the same significance for environmental protection.
Because of the strong magnetism of monoclinic system pyrrhotite, the separation of magnetite and pyrrhotite by using a magnetic separation method is almost impossible. The most common separation method currently is flotation to remove pyrrhotite from magnetite. However, the pyrrhotite is easy to oxidize, so that the floatability of the pyrrhotite is reduced, the difficulty of the floatation of the pyrrhotite is increased, and the magnetic force between the magnetite and the pyrrhotite causes the floatation of the pyrrhotite to be more difficult. At present, pH regulators (sulfuric acid, oxalic acid, ferrous sulfate, ammonium oxalate and other medicaments) and copper sulfate are added to improve the floatability of pyrrhotite, and collectors (such as combined collectors formed by xanthate, butyl ammonium black powder and diesel oil) are optimized to strengthen the flotation separation of pyrrhotite.
The composition and the crystal structure of pyrrhotite (Fe1-XS) are variable, and when the pyrrhotite which is extremely easy to oxidize and crush is encountered, the existing magnetite flotation desulphurization method is insufficient in desulphurization efficiency. In the prior art, the magnetic agglomeration of the magnetite and the pyrrhotite is weakened only by a demagnetizer, but the magnetite and the pyrrhotite have magnetism, the direct magnetic adhesion of the magnetite and the pyrrhotite still exists, and the desulfurization effect is poor.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a method for desulfurizing magnetite to solve the problems of the prior art that only a demagnetizer is used to weaken the magnetic agglomeration of magnetite and pyrrhotite, but the magnetite and pyrrhotite are magnetic, direct magnetic adhesion of the magnetite and pyrrhotite still exists, and the desulfurization effect is poor.
The invention provides a magnetite desulphurization method, which comprises the following steps:
adding long-chain alkane into the sulfur-containing magnetite ore pulp with the pH value of 6-7, and performing vibration dispersion treatment on the ore pulp added with the long-chain alkane through ultrasonic waves to obtain first ore pulp;
adding an activating agent into the first ore pulp while stirring to activate the first ore pulp to obtain a second ore pulp;
adding a collecting agent into the second ore pulp while stirring to perform primary collecting treatment on sulfur in the second ore pulp to obtain third ore pulp;
and carrying out flotation desulfurization treatment on the third ore pulp to complete desulfurization on the ore pulp containing the sulfur magnetite.
In addition, the preferable scheme is that the working frequency of the ultrasonic wave is 20-30 KHz; and the time for vibration dispersion treatment of the ore pulp added with the long-chain alkane through the ultrasonic wave is 5-10 min.
In addition, the preferable scheme is that the preparation method of the sulfur-containing magnetite ore pulp with the pH value of 6-7 comprises the following steps: gradually adding acid into the sulfur magnetite-containing ore pulp to adjust the pH value of the ore pulp, so that the pH value of the sulfur magnetite-containing ore pulp is 6-7; wherein the acid is a strong acid or a weak acid.
In addition, it is preferable that the long-chain alkane is diesel oil or kerosene.
Further, it is preferable that the activator is a copper ion-containing activator; the addition amount of the copper ion-containing activator is 25-50 g/t; and the activation treatment time of the first ore pulp is 3-5 min.
Further, it is preferable that the collector includes: 1:1 of butylated xanthate and butylammonium nigride; the addition amount of the collecting agent is 60-80 g/t; and the time for carrying out primary collecting treatment on the sulfur in the second ore pulp is 2-4 min.
In addition, it is preferable that the performing of the flotation desulfurization treatment on the third ore pulp to complete the desulfurization of the ore pulp containing sulfurous magnetite comprises:
sequentially carrying out primary roughing, two-stage scavenging and two-stage concentration on the third ore pulp; wherein the content of the first and second substances,
adding 30-40 g/t of collecting agent during the first stage of scavenging at the two ends;
and adding 15-20 g/t of collecting agent during the second-stage scavenging of the two-end scavenging.
In addition, it is preferable that the first slurry is prepared in a first agitation vessel, wherein an ultrasonic vibration bar is disposed inside the first agitation vessel; the second ore pulp is prepared in a second stirring container, wherein a second stirring device is arranged in the second stirring container; the third slurry is produced in a third stirred tank, wherein a third stirring device is arranged inside the third stirred tank.
According to the technical scheme, the magnetite desulfurization method provided by the invention has the advantages that the ore pulp of the sulfur-containing magnetite with the pH value of 6-7 and added with the long-chain alkane is dispersed through ultrasonic waves, and the generation of Fe (OH) on the surface of pyrrhotite due to oxidation is promoted3Cleaning of hydrophilic oxides; due to the magnetic action of the magnetite and the pyrrhotite, when the floatability of the pyrrhotite is weakened due to the magnetic adhesion of the magnetite and the pyrrhotite, the dispersion of the magnetite and the pyrrhotite can be enhanced by adopting ultrasonic dispersion treatment; the combination of the ultrasonic wave and the long-chain alkane promotes the formation of hydrophobic flocs of the pyrrhotite, particularly the fine-grain pyrrhotite, and improves the flotation removal effect of the pyrrhotite, particularly the fine-grain pyrrhotite, thereby improving the desulfurization effect.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a flow diagram of a magnetite desulfurization process according to an embodiment of the present invention;
FIG. 2 is a process flow diagram of a magnetite desulfurization process according to an embodiment of the present invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems that the prior art only relies on a demagnetizer to weaken the magnetic agglomeration of magnetite and pyrrhotite, but the magnetite and the pyrrhotite have magnetism, the direct magnetic adhesion of the magnetite and the pyrrhotite still exists, the desulfurization effect is poor and the like, the magnetite desulfurization method is provided.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to illustrate the magnetite desulfurization method provided by the present invention, fig. 1 shows a flow of the magnetite desulfurization method according to an embodiment of the present invention; fig. 2 shows a process flow of a magnetite desulfurization method according to an embodiment of the present invention.
As shown in FIG. 1 and FIG. 2, the method for desulfurizing magnetite provided by the invention comprises the following steps:
s1, adding long-chain alkane into the sulfur-containing magnetite ore pulp with the pH value of 6-7, and performing vibration dispersion treatment on the ore pulp added with the long-chain alkane through ultrasonic waves to obtain first ore pulp;
s2, adding an activating agent into the first ore pulp while stirring to activate the first ore pulp to obtain a second ore pulp;
s3, adding a collecting agent into the second ore pulp while stirring, and carrying out primary collecting treatment on sulfur in the second ore pulp to obtain third ore pulp;
and S4, performing flotation desulfurization treatment on the third ore pulp to complete desulfurization of the ore pulp containing the sulfur magnetite.
Dispersing the ore pulp of sulfur-containing magnetite with pH value of 6-7, which is added with long-chain alkane, by using ultrasonic waves to promote Fe (OH) generated by oxidation on the surface of pyrrhotite3Cleaning of hydrophilic oxides; due to the magnetic action of the magnetite and the pyrrhotite, when the floatability of the pyrrhotite is weakened due to the magnetic adhesion of the magnetite and the pyrrhotite, the dispersion of the magnetite and the pyrrhotite can be enhanced by adopting ultrasonic dispersion treatment; the combination of the ultrasonic wave and the long-chain alkane promotes the formation of hydrophobic flocs of the pyrrhotite, particularly the fine-grain pyrrhotite, and improves the flotation removal effect of the pyrrhotite, particularly the fine-grain pyrrhotite, thereby improving the desulfurization effect.
As a preferred embodiment of the invention, the working frequency of the ultrasonic wave is 20-30 KHz; the vibration dispersion treatment time of the ore pulp added with the long-chain alkane through ultrasonic waves is 5-10 min. The ore pulp in the working frequency range of the ultrasonic waves is subjected to dispersion treatment, so that the desulfurization effect is better.
According to a preferred embodiment of the invention, the preparation method of the sulfur magnetite-containing ore pulp with the pH value of 6-7 comprises the following steps: gradually adding acid into the ore pulp containing the sulfur magnetite, and adjusting the pH value of the ore pulp to make the pH value of the ore pulp containing the sulfur magnetite 6-7; wherein, the acid is strong acid or weak acid. Adding acid into the ore pulp containing the sulfur magnetite, adjusting the pH value of the ore pulp to enable the pH value of the ore pulp to be 6-7, and cleaning a hydrophilic oxidation film on the surface of pyrrhotite to facilitate subsequent desulfurization, wherein the acid can be strong acid, such as sulfuric acid and nitric acid; weak acids such as citric acid, acetic acid, and the like may also be selected. The mineral acid can be organic acid or inorganic acid, as long as hydrogen ions can be supplemented into the ore pulp to achieve the purpose of adjusting the pH value of the ore pulp, wherein the mineral acid is preferably sulfuric acid, and has low cost and small using amount.
As a preferred embodiment of the invention, the long-chain alkane is diesel or kerosene. The formation of hydrophobic flocs on pyrrhotite, especially fine-grained pyrrhotite, is promoted by the addition of long-chain alkanes under the action of ultrasonic waves.
As a preferred embodiment of the present invention, the activator is a copper ion-containing activator; the addition amount of the copper ion-containing activator is 25-50 g/t; the activation treatment time of the first ore pulp is 3-5 min. Copper ions are conveniently introduced by adding the copper ion-containing activating agent, copper xanthate is formed on the surface of pyrrhotite, and the hydrophobicity of the surface of pyrrhotite is increased, so that the floatability of pyrrhotite is increased, and the subsequent desulfurization is facilitated. Preferably, copper sulfate. In addition, the activator can also be selected from lead ion containing activators, and lead ions have the same effect as copper ions.
As a preferred embodiment of the present invention, the collector comprises: 1:1 of butylated xanthate and butylammonium nigride; the addition amount of the collecting agent is 60-80 g/t; and the time for carrying out primary collecting treatment on the sulfur in the second ore pulp is 2-4 min. And carrying out flotation on the pyrrhotite in the ore pulp by using a collecting agent.
As a preferred embodiment of the present invention, the flotation desulfurization treatment of the third slurry to complete the desulfurization of the sulfur magnetite-containing slurry comprises:
sequentially carrying out primary roughing, two-stage scavenging and two-stage concentration on the third ore pulp; wherein the content of the first and second substances,
adding 30-40 g/t of collecting agent during the first stage of scavenging of the two stages;
and adding 15-20 g/t of collecting agent during the second stage of the two-stage scavenging.
The selected collecting agent can be the collecting agent of the butyl xanthate and the butyl ammonium melanophore in a ratio of 1:1, and the desulfurization effect is better through the sectional flotation.
As a preferred embodiment of the present invention, the first slurry is prepared in a first agitation vessel, in which an ultrasonic vibration bar is disposed inside the first agitation vessel; the second ore pulp is prepared in a second stirring container, wherein a second stirring device is arranged in the second stirring container; the third slurry is produced in a third stirred tank, wherein a third stirring device is arranged inside the third stirred tank. Different steps are carried out in different stirring containers, so that continuous industrial operation is facilitated, the method is suitable for batch desulfurization process, time is saved, and efficiency is improved.
To further illustrate the effects of the methods provided by the present invention, the following specific examples of validation are provided.
Verification example 1
Some magnetite concentrate contains 6.27% sulphur. The concentrate is mixed in a first stirring barrel, sulfuric acid is added to adjust the pH value of the ore pulp to 6.5, and 15g/t of diesel oil is added. Wherein, arrange ultrasonic vibration stick in the first agitator, its operating frequency is 28KHz, and the time that the ore pulp passes through first agitator is 10 min. Then the ore pulp is stirred by a second stirring barrel, 50g/t of copper sulfate is added, and the passing time of the ore pulp is 3 min. And finally, the ore pulp passes through a third stirring barrel, the collecting agent is added, the adding amount is 80g/t, and the passing time of the ore pulp is 2 min. And finally, carrying out flotation, wherein the flotation operation consists of one-section roughing, two-section scavenging and two-section concentrating operation. The first scavenging operation adds 40g/t of collector, and the second scavenging adds 20g/t of collector. And finally, performing flotation desulfurization to obtain magnetite concentrate with the sulfur content of 0.10% and the sulfur removal rate of 98.5%.
Verification example 2
The time for the slurry to pass through the first mixing drum was 3min compared to that of comparative example 1. Finally, the S content in the magnetic concentrate is 0.14 percent, and the sulfur removal rate is 98.2 percent.
Verification example 3
Compared with the verification example 1, the working frequency of the ultrasonic vibration rod is 15KHz, the S content in the final magnetic concentrate is 0.13%, and the sulfur removal rate is 98.4%.
Verification example 4
Compared with the verification example 1, the diesel oil adding amount of the first stirring barrel is 5g/t, the S content in the magnetic concentrate is 0.14%, and the sulfur removal rate is 98.2%.
Comparative example 1
Compared with the verification example 1, the first stirring barrel does not use ultrasonic treatment, and the S content in the final magnetic concentrate is 0.25%, and the sulfur removal rate is 96.8%.
According to the magnetite desulphurization method provided by the invention, the ore pulp of the sulfur-containing magnetite with the pH value of 6-7 and added with the long-chain alkane is dispersed through ultrasonic waves, and the Fe (OH) generated by oxidation on the surface of pyrrhotite is promoted3Cleaning of hydrophilic oxides; due to the magnetic action of the magnetite and the pyrrhotite, when the floatability of the pyrrhotite is weakened due to the magnetic adhesion of the magnetite and the pyrrhotite, the dispersion of the magnetite and the pyrrhotite can be enhanced by adopting ultrasonic dispersion treatment; the combination of the ultrasonic wave and the long-chain alkane promotes the formation of hydrophobic flocs of the pyrrhotite, particularly the fine-grain pyrrhotite, and improves the flotation removal effect of the pyrrhotite, particularly the fine-grain pyrrhotite, thereby improving the desulfurization effect.
The magnetite devulcanization process proposed according to the invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the magnetite desulfurization method set forth above without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (8)
1. A magnetite desulphurization method is characterized by comprising the following steps:
adding long-chain alkane into the sulfur-containing magnetite ore pulp with the pH value of 6-7, and performing vibration dispersion treatment on the ore pulp added with the long-chain alkane through ultrasonic waves to obtain first ore pulp;
adding an activating agent into the first ore pulp while stirring to activate the first ore pulp to obtain a second ore pulp;
adding a collecting agent into the second ore pulp while stirring to perform primary collecting treatment on sulfur in the second ore pulp to obtain third ore pulp;
and carrying out flotation desulfurization treatment on the third ore pulp to complete desulfurization on the ore pulp containing the sulfur magnetite.
2. A magnetite devulcanization method according to claim 1, characterised in that,
the working frequency of the ultrasonic wave is 20-30 KHz;
and the time for vibration dispersion treatment of the ore pulp added with the long-chain alkane through the ultrasonic wave is 5-10 min.
3. The magnetite desulfurization method according to claim 1, wherein the preparation method of the sulfur magnetite-containing pulp having a pH of 6 to 7 comprises:
gradually adding acid into the sulfur magnetite-containing ore pulp to adjust the pH value of the ore pulp, so that the pH value of the sulfur magnetite-containing ore pulp is 6-7; wherein the acid is a strong acid or a weak acid.
4. A magnetite devulcanization method according to claim 1, characterised in that,
the long-chain alkane is diesel oil or kerosene.
5. A magnetite devulcanization method according to claim 1, characterised in that,
the activator is a copper ion-containing activator;
the addition amount of the copper ion-containing activator is 25-50 g/t;
and the activation treatment time of the first ore pulp is 3-5 min.
6. A magnetite devulcanization method according to claim 1, characterised in that,
the collector comprises: 1:1 of butylated xanthate and butylammonium nigride;
the addition amount of the collecting agent is 60-80 g/t;
and the time for carrying out primary collecting treatment on the sulfur in the second ore pulp is 2-4 min.
7. The magnetite devulcanization method according to claim 1, wherein the subjecting the third slurry to a flotation devulcanization process to complete the devulcanization of the sulfurous magnetite slurry comprises:
sequentially carrying out primary roughing, two-stage scavenging and two-stage concentration on the third ore pulp; wherein the content of the first and second substances,
adding 30-40 g/t of collecting agent during the first stage of scavenging of the two stages;
and adding 15-20 g/t of collecting agent during the second stage of the two-stage scavenging.
8. A magnetite devulcanization method according to claim 1, characterised in that,
the first slurry is prepared in a first stirring container, wherein an ultrasonic vibration rod is arranged inside the first stirring container;
the second ore pulp is prepared in a second stirring container, wherein a second stirring device is arranged in the second stirring container;
the third slurry is produced in a third stirred tank, wherein a third stirring device is arranged inside the third stirred tank.
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| CN116900035A (en) * | 2023-07-28 | 2023-10-20 | 招远中环科技有限公司 | Deep desulfurization method for high-silicon tailings |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN116900035B (en) * | 2023-07-28 | 2024-04-09 | 招远中环科技有限公司 | Deep desulfurization method for high-silicon tailings |
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