CN101302020B - High-sulphur alumyte desulfuration method - Google Patents
High-sulphur alumyte desulfuration method Download PDFInfo
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- CN101302020B CN101302020B CN2008103023616A CN200810302361A CN101302020B CN 101302020 B CN101302020 B CN 101302020B CN 2008103023616 A CN2008103023616 A CN 2008103023616A CN 200810302361 A CN200810302361 A CN 200810302361A CN 101302020 B CN101302020 B CN 101302020B
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Abstract
The invention relates to a method for desulphurization of high-sulphur alumyte. The alumyte is pretreated by adopting magnetization; the alumyte after the magnetization treatment is desulfurized through a grinding and magnetic separation process. The method adopts the electro-magnetization technology to carry out pretreatment to the high-sulphur alumyte in order that a nonmagnetic sulphide mineral (FeS2) in the high-sulphur alumyte is converted into strong magnetic Fe(1-X) S, then sulfur in the alumyte is separated and removed by a strong magnetic dressing machine. The method has simple and effective process, adopts the electromagnetic process to carry out selective treatment to the high-sulphur alumyte and excites a structure for converting the nonmagnetic sulphide mineral to the magnetic sulfide and has sensitive response. Therefore, the method has the advantages of low operation expenses, energy conservation, environmental protection, convenient and safe operation, etc. and can overcome the problems of the prior art at the same time.
Description
Technical field: the method that the present invention relates to a kind of high-sulphur alumyte desulfuration; The field that belongs to environmental protection, metallurgical technology.
Background technology: China's bauxite belong to more than 90% high-sulfur, high silicon, low iron, indissoluble in low-grade, smelting technology complexity, production energy consumption height.Sulphur is mainly with sulfide mineral in the high-sulfur bauxite: pyrite (FeS
2) and isomer white pyrite and melnikovite and a spot of CaSO
4Class vitriol.The sulfide of iron at high temperature at first is decomposed into sodium disulfide in the production, finally be oxidized to sodium sulfate and enter in the sodium aluminate solution, and accumulation on stream, brings many difficulties and harm for alumina producing and operation.China most of aluminium industrial production producer adopts the desulphurization of mother liquid evaporation process usually or add zinc oxide in circulation alkali liquor and purifies desulphurization methodology (alumina producing Bayer process technology) at present; Raw material coal sulfur method (sintering process production alumina technology).All there are shortcomings such as sulfur removal effectiveness is low, production cost is expensive, sulfur removal technology complexity in these methods.
Summary of the invention
The object of the invention is: the method that a kind of high-sulphur alumyte desulfuration is provided, energising magnetization pre-treatment before high-sulfur bauxite enters the process for making alumina system, the most of sulphur that utilizes strong magnetic ore separation machine to remove in the high-sulfur bauxite again magnetizes thing, has simplified existing smelting sulfur removal technology, energy efficient.
The present invention constitutes like this: the sulfur method of high-sulfur bauxite, adopt magnetization pre-treatment alum clay ore deposit, and the bauxite after magnetization is handled is by levigate magnetic separation process desulfurization.
The method of above-mentioned high-sulphur alumyte desulfuration, alumina silica ratio in the raw material high-sulfur bauxite: A/S 〉=3; Sulphur in the high-sulfur bauxite 〉=0.8%.
The method of above-mentioned high-sulphur alumyte desulfuration is magnetized pretreated electromagnetic frequency and is: 915MHz～2.45GHz.
The method of above-mentioned high-sulphur alumyte desulfuration is magnetized pretreated magnetizing time and is: 0.01～10 second.
The method of above-mentioned high-sulphur alumyte desulfuration is magnetized pretreated magnetizing time and is preferably: 0.1～2 second.
The method of above-mentioned high-sulphur alumyte desulfuration, concrete grammar be,
1) during the high-sulfur bauxite of coarse crushing was packed the electromagnetic radiation retort into, processing was magnetized in energising;
2) high-sulfur bauxite that will magnetize after handling is in small, broken bits, crosses 200 mesh sieves;
3) with the sulphur magnetization thing in this high-sulfur bauxite of strong magnetic ore separation machine blanking.
Find that after deliberation the sulphur in the high-sulfur bauxite is mostly with sulfide mineral: pyrite (FeS
2) and isomer white pyrite and the existence of melnikovite kenel.The present invention adopts the electromagnetization technology that high-sulfur bauxite is carried out pre-treatment, makes the non magnetic sulfide mineral (FeS in the high-sulfur bauxite
2) be converted into ferromagnetic Fe
(1-X)S uses the sulphur in the strong magnetic ore separation machine blanking bauxite again.Technology is simple, effective.The electromagnetism technology that adopts is carried out the selectivity processing to high-sulfur bauxite, excites non magnetic sulfide mineral to change into the structure of magnetic sulfide, is quick on the draw.Thereby the present invention to have working cost low, energy-saving and environmental protection, advantage such as easy to operate, safe; Can overcome simultaneously the problem that prior art exists.
The applicant finds that through experiment the sulfurous iron ore in the high-sulfur bauxite can take off, and organosulfur can not take off.So the raw material that the present invention is directed to, alumina silica ratio in the high-sulfur bauxite: A/S 〉=3; Sulphur in the high-sulfur bauxite 〉=0.8%, the content of sulphur is low excessively, and effect is bad.Be preferably between 915MHz～2.45GHz for the pretreated electromagnetic frequency of magnetization.When magnetization, moment just can change into magnetic sulfide with non magnetic sulfide mineral, and is excessive, too much for preventing ore, causes magnetization not exclusively, and the magnetized time was controlled at 0.01～10 second, was preferably: 0.1～2 second.After desulfurization of the present invention is handled, can remove the sulphur about 70%.
Embodiment:
Embodiments of the invention 1: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:3, sulfur-bearing: 2%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 915MHz, in the 4 minutes reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.3%.
Embodiments of the invention 2: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:3.5, sulfur-bearing: 1.5%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 945MHz, in the 1 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.26%.
Embodiments of the invention 3: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:4, sulfur-bearing: 1.4%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 1550MHz, in the 0.5 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.25%.
Embodiments of the invention 4: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:4.5, sulfur-bearing: 1.2%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 2000MHz, in the 0.2 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.24%.
Embodiments of the invention 5: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:5, sulfur-bearing: 0.9%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 1250MHz, in the 0.1 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.20%.
Embodiments of the invention 6: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:5.5, sulfur-bearing: 1.0%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 2.45GHz, in the 1 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.22%.
Embodiments of the invention 7: in special electromagnetization container, add 10 kilograms of high-sulfur bauxites, ore major ingredient: A/S:5, sulfur-bearing: 0.8%.Coarse crushing.Energising magnetization reaction, electromagnetic frequency is: 2450MHz, in the 0.01 minute reaction times of magnetization, the bauxite that obtains is crossed 200 mesh sieves through fine grinding.Go the sulphur in the bauxite to magnetize thing with the strong magnetic ore separation machine blanking.Bauxite after the detection desulfurization, sulphur content is 0.20%.
Claims (4)
1. the sulfur method of a high-sulfur bauxite is characterized in that: adopt magnetization pre-treatment alum clay ore deposit, the bauxite after magnetization is handled is by levigate magnetic separation process desulfurization; Alumina silica ratio in the raw material high-sulfur bauxite: A/S 〉=3; Sulphur in the high-sulfur bauxite 〉=0.8%; It comprises the steps,
1) during the high-sulfur bauxite after the pulverizing was packed the electromagnetic radiation retort into, processing was magnetized in energising;
2) high-sulfur bauxite that will magnetize after handling is in small, broken bits, crosses 200 mesh sieves;
3) with the sulphur magnetization thing in this high-sulfur bauxite of strong magnetic ore separation machine blanking.
2. according to the sulfur method of the described high-sulfur bauxite of claim 1, it is characterized in that: magnetizing pretreated electromagnetic frequency is: 915MHz～2.45GHz.
3. according to the sulfur method of the described high-sulfur bauxite of claim 1, it is characterized in that: magnetizing pretreated magnetizing time is: 0.01～10 second.
4. according to the sulfur method of the described high-sulfur bauxite of claim 3, it is characterized in that: magnetizing pretreated magnetizing time is: 0.1～2 second.
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| CN101302020B true CN101302020B (en) | 2010-11-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102815730B (en) * | 2012-08-07 | 2016-08-24 | 北京化工大学 | Oxidation sweetening-the magnetization of a kind of high-sulfur bauxite removes ferrum preprocess method |
| CN103173608B (en) * | 2013-03-25 | 2015-08-19 | 中国科学院过程工程研究所 | A kind of Electrolysis-desulphurization method of high-sulfur monohydrallite |
| CN109092553B (en) * | 2018-08-01 | 2020-03-27 | 李清湘 | Beneficiation method for obtaining low-sulfur diaspore concentrate |
| CN113912095B (en) * | 2021-10-22 | 2023-08-18 | 昆明理工大学 | Precipitation desulfurization method for high-sulfur bauxite leaching solution |
Citations (4)
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|---|---|---|---|---|
| US4276081A (en) * | 1978-10-10 | 1981-06-30 | Hazen Research, Inc. | Process for beneficiating ores |
| CN1098965A (en) * | 1993-08-14 | 1995-02-22 | 赣州有色冶金研究所 | A kind of method that from the bauxite stripping waste residue, reclaims iron mineral |
| CN1593775A (en) * | 2004-07-12 | 2005-03-16 | 洋浦金海铝业工贸有限公司 | Method for magnetic separating of aluminum and iron in high iron bauxite |
| CN101012498A (en) * | 2007-02-12 | 2007-08-08 | 李乾宽 | Method for producing high alumina refined powder by using alumyte |
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2008
- 2008-06-26 CN CN2008103023616A patent/CN101302020B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276081A (en) * | 1978-10-10 | 1981-06-30 | Hazen Research, Inc. | Process for beneficiating ores |
| CN1098965A (en) * | 1993-08-14 | 1995-02-22 | 赣州有色冶金研究所 | A kind of method that from the bauxite stripping waste residue, reclaims iron mineral |
| CN1593775A (en) * | 2004-07-12 | 2005-03-16 | 洋浦金海铝业工贸有限公司 | Method for magnetic separating of aluminum and iron in high iron bauxite |
| CN101012498A (en) * | 2007-02-12 | 2007-08-08 | 李乾宽 | Method for producing high alumina refined powder by using alumyte |
Non-Patent Citations (2)
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| 何伯泉等.试论我国高硫铝土矿脱硫新方案.轻金属 2.1996,(2),3-5. |
| 何伯泉等.试论我国高硫铝土矿脱硫新方案.轻金属 2.1996,(2),3-5. * |
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