CN102641782A - Beneficiation method - Google Patents
Beneficiation method Download PDFInfo
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- CN102641782A CN102641782A CN2012101613884A CN201210161388A CN102641782A CN 102641782 A CN102641782 A CN 102641782A CN 2012101613884 A CN2012101613884 A CN 2012101613884A CN 201210161388 A CN201210161388 A CN 201210161388A CN 102641782 A CN102641782 A CN 102641782A
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Abstract
The invention discloses a beneficiation method which is used for iron ore with uneven dissemination size of magnetic minerals. The beneficiation method comprises the steps of raw ore crushing and ore grinding and beneficiation processes. The beneficiation method is characterized in that the raw ore crushing process comprise five procedures of jaw crushing, coarse crushing, medium crushing, fine crushing and dry crushing, wherein the jaw crushing is realized as follows: raw ore with particle size of not more than 1000mm is crushed into ore with particle size of not more than 320mm; the coarse crushing is realized as follows: the ore subjected to the jaw crushing is crushed to ore with particle size of not more than 276mm; the medium crushing is realized as follows: the ore subjected to the coarse crushing is crushed to ore with particle size of not more than 61mm; the fine crushing is realized as follows: the ore subjected to medium crushing is crushed to ore with particle size of not more than 18mm; and the ore grinding and beneficiation process comprises the procedure of carrying out first-section ore grinding, first-time magnetic separation, demagnetizing, second-time magnetic separation, demagnetizing, third-time magnetic separation, demagnetizing, fourth-time magnetic separation and concentrate fine on crushed ore. The grade of the concentrate fine iron provided by the invention is increased by 2.76 percent compared with that of the conventional beneficiation method.
Description
Technical field:
The present invention is mainly used in the ore dressing of the uneven iron ore of magnetic mineral granularity embedding cloth.
Background technology
The uneven iron ore of magnetic mineral granularity embedding cloth, beneficiating efficiency is low, the difficult control of breeze grade.
Summary of the invention
In order to improve beneficiating efficiency, improve the stability of breeze grade, the present invention provides a kind of beneficiation method.
The present invention includes crushing raw ore, ore grinding ore-dressing technique link;------5 technological processes are sieved in middle fragmentation---fine crushing---dry separation in coarse crushing to it is characterized in that comprising the jaw fragmentation by crushing raw ore; Wherein, the jaw fragmentation is that the tcrude ore that particle diameter is not more than 1000mm is crushed to the ore that particle diameter is not more than 320mm; Coarse crushing is that the ore that jaw is broken is crushed to the ore that particle diameter is not more than 276mm again; In fragmentation be that ore with coarse crushing is crushed to the ore that particle diameter is not more than 61mm again; Fine crushing is that the ore with middle fragmentation is crushed to the crushed product that particle diameter is not more than 18mm again;
The technological process of said ore grinding ore dressing is: with crushed product through first section ore grinding---------------------the 4th magnetic separation---fine ore that takes off magnetic of magnetic separation for the third time that takes off magnetic of magnetic separation for the second time that takes off magnetic of magnetic separation for the first time.
The concrete operations step is following:
Step 1: the tcrude ore that particle diameter is not more than 1000mm is crushed to the ore that particle diameter is not more than 320mm through jaw crusher;
Step 2: the ore that the ore after step 1 fragmentation is crushed to the little 276mm of particle diameter through gyratory crusher;
Step 3: the ore that the ore after step 2 fragmentation is not more than 61mm through the S cone crushing to particle diameter;
Step 4: the ore after step 3 fragmentation is sieved through linear vibrating screen, and wherein particle diameter is not more than the crushed product that is of 18mm; Particle diameter is not more than the crushed product of 18mm to particle diameter through the SH cone crushing greater than ore on the sieve of 18mm;
Step 5: the crushed product that is not more than 18mm that step 4 is obtained carries out first section ore grinding acquisition primary grinding thing;
Step 6: the primary grinding thing that step 5 is obtained carries out the grade size classification first time; The carrying out that the symbol classification dimensions requires magnetic separation for the first time obtains a magnetic separation thing; What do not meet the classification dimensions requirement sends first section ore grinding again back to, until a magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 7: the magnetic separation thing that step 6 is obtained takes off magnetic through demagnetizer and obtains once to take off the magnetic mineral;
Step 8: the magnetic mineral that once take off that step 7 is obtained carry out the grade size classification second time; The carrying out that the symbol classification dimensions requires magnetic separation for the second time obtains secondary magnetic separation thing; Do not meet the second section ore grinding of delivering to of classification dimensions requirement, until the secondary magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 9: the secondary magnetic separation thing that step 8 is obtained takes off magnetic through demagnetizer and obtains secondary and take off the magnetic mineral;
Step 10: the secondary that step 9 is obtained takes off the magnetic mineral and carries out the classification of dusting cover grade size; The carrying out magnetic separation for the third time that the symbol classification dimensions requires obtains three magnetic separation things; Do not meet delivering to of classification dimensions requirement and advanced again behind three sections ore grindings and carry out the classification of dusting cover grade size after demagnetizer takes off magnetic, until three magnetic separation things that obtain to meet the classification dimensions requirement;
Step 11: three magnetic separation things that step 10 is obtained take off magnetic through demagnetizer and obtain three times and take off the magnetic mineral;
Step 12: the magnetic mineral that take off for three times that step 11 is obtained carry out the 4th magnetic separation through the magnetic separation post and obtain fine ore.
The magnetic separator that the present invention uses is dry-type magnetic extractor, and its magnetic field intensity is 4000 oersteds, and running frequency is 50 hertz.
Fine ore iron grade of the present invention has improved 2.76% than existing beneficiation method.
The specific embodiment
Embodiment: step 1: the tcrude ore that particle diameter is not more than 1000mm is crushed to the ore that particle diameter is not more than 320mm through jaw crusher;
Step 2: the ore that the ore after step 1 fragmentation is crushed to the little 276mm of particle diameter through gyratory crusher;
Step 3: the ore that the ore after step 2 fragmentation is not more than 61mm through the S cone crushing to particle diameter;
Step 4: the ore after step 3 fragmentation is sieved through linear vibrating screen, and wherein particle diameter is not more than the crushed product that is of 18mm; Particle diameter is not more than the crushed product of 18mm to particle diameter through the SH cone crushing greater than ore on the sieve of 18mm;
Step 5: the crushed product that is not more than 18mm that step 4 is obtained carries out first section ore grinding acquisition primary grinding thing;
Step 6: the primary grinding thing that step 5 is obtained carries out the grade size classification first time; The carrying out that the symbol classification dimensions requires magnetic separation for the first time obtains a magnetic separation thing; What do not meet the classification dimensions requirement sends first section ore grinding again back to, until a magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 7: the magnetic separation thing that step 6 is obtained takes off magnetic through demagnetizer and obtains once to take off the magnetic mineral;
Step 8: the magnetic mineral that once take off that step 7 is obtained carry out the grade size classification second time; The carrying out that the symbol classification dimensions requires magnetic separation for the second time obtains secondary magnetic separation thing; Do not meet the second section ore grinding of delivering to of classification dimensions requirement, until the secondary magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 9: the secondary magnetic separation thing that step 8 is obtained takes off magnetic through demagnetizer and obtains secondary and take off the magnetic mineral;
Step 10: the secondary that step 9 is obtained takes off the magnetic mineral and carries out the classification of dusting cover grade size; The carrying out magnetic separation for the third time that the symbol classification dimensions requires obtains three magnetic separation things; Do not meet delivering to of classification dimensions requirement and advanced again behind three sections ore grindings and carry out the classification of dusting cover grade size after demagnetizer takes off magnetic, until three magnetic separation things that obtain to meet the classification dimensions requirement;
Step 11: three magnetic separation things that step 10 is obtained take off magnetic through demagnetizer and obtain three times and take off the magnetic mineral;
Step 12: the magnetic mineral that take off for three times that step 11 is obtained carry out the 4th magnetic separation through the magnetic separation post and obtain fine ore.
Claims (2)
1. beneficiation method; Comprise crushing raw ore, ore grinding ore-dressing technique link;------5 technological processes are sieved in middle fragmentation---fine crushing---dry separation in coarse crushing to it is characterized in that comprising the jaw fragmentation by crushing raw ore; Wherein, the jaw fragmentation is that the tcrude ore that particle diameter is not more than 1000mm is crushed to the ore that particle diameter is not more than 320mm; Coarse crushing is that the ore that jaw is broken is crushed to the ore that particle diameter is not more than 276mm again; In fragmentation be that ore with coarse crushing is crushed to the ore that particle diameter is not more than 61mm again; Fine crushing is that the ore with middle fragmentation is crushed to the crushed product that particle diameter is not more than 18mm again; The technological process of ore grinding ore dressing is: with crushed product through first section ore grinding---------------------the 4th magnetic separation---fine ore that takes off magnetic of magnetic separation for the third time that takes off magnetic of magnetic separation for the second time that takes off magnetic of magnetic separation for the first time.
2. a kind of beneficiation method according to claim 1 is characterized in that concrete operations step 1: the tcrude ore that particle diameter is not more than 1000mm is crushed to the ore that particle diameter is not more than 320mm through jaw crusher;
Step 2: the ore that the ore after step 1 fragmentation is crushed to the little 276mm of particle diameter through gyratory crusher;
Step 3: the ore that the ore after step 2 fragmentation is not more than 61mm through the S cone crushing to particle diameter;
Step 4: the ore after step 3 fragmentation is sieved through linear vibrating screen, and wherein particle diameter is not more than the crushed product that is of 18mm; Particle diameter is not more than the crushed product of 18mm to particle diameter through the SH cone crushing greater than ore on the sieve of 18mm;
Step 5: the crushed product that is not more than 18mm that step 4 is obtained carries out first section ore grinding acquisition primary grinding thing;
Step 6: the primary grinding thing that step 5 is obtained carries out the grade size classification first time; The carrying out that the symbol classification dimensions requires magnetic separation for the first time obtains a magnetic separation thing; What do not meet the classification dimensions requirement sends first section ore grinding again back to, until a magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 7: the magnetic separation thing that step 6 is obtained takes off magnetic through demagnetizer and obtains once to take off the magnetic mineral;
Step 8: the magnetic mineral that once take off that step 7 is obtained carry out the grade size classification second time; The carrying out that the symbol classification dimensions requires magnetic separation for the second time obtains secondary magnetic separation thing; Do not meet the second section ore grinding of delivering to of classification dimensions requirement, until the secondary magnetic separation thing that obtains to meet the classification dimensions requirement;
Step 9: the secondary magnetic separation thing that step 8 is obtained takes off magnetic through demagnetizer and obtains secondary and take off the magnetic mineral;
Step 10: the secondary that step 9 is obtained takes off the magnetic mineral and carries out the classification of dusting cover grade size; The carrying out magnetic separation for the third time that the symbol classification dimensions requires obtains three magnetic separation things; Do not meet delivering to of classification dimensions requirement and advanced again behind three sections ore grindings and carry out the classification of dusting cover grade size after demagnetizer takes off magnetic, until three magnetic separation things that obtain to meet the classification dimensions requirement;
Step 11: three magnetic separation things that step 10 is obtained take off magnetic through demagnetizer and obtain three times and take off the magnetic mineral;
Step 12: the magnetic mineral that take off for three times that step 11 is obtained carry out the 4th magnetic separation through the magnetic separation post and obtain fine ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101613884A CN102641782A (en) | 2012-05-23 | 2012-05-23 | Beneficiation method |
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| CN2012101613884A CN102641782A (en) | 2012-05-23 | 2012-05-23 | Beneficiation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041920A (en) * | 2012-12-19 | 2013-04-17 | 太原钢铁(集团)有限公司 | Ore dressing method and ore dressing system suitable for lean magnetite ores |
| CN106829985A (en) * | 2016-11-28 | 2017-06-13 | 赣州金环磁选设备有限公司 | A kind of method of the synthetical recovery of sandy kaoline containing mica |
| CN107344142A (en) * | 2017-07-11 | 2017-11-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore high intensity magnetic separation mine tailing online recycling utilizes technique |
| CN108672071A (en) * | 2018-05-07 | 2018-10-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of artificial magnet plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process |
| CN108940574A (en) * | 2018-08-21 | 2018-12-07 | 耒阳市百汇粉体有限公司 | A kind of production method of texture circle sand |
| CN111744639A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Mineral separation crushing process |
| CN113042179A (en) * | 2021-03-10 | 2021-06-29 | 山东域潇锆钛矿业股份有限公司 | Method for improving utilization rate of ilmenite |
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| US3672579A (en) * | 1970-08-10 | 1972-06-27 | Univ Minnesota | Process for beneficiating magnetite iron ore |
| US5307938A (en) * | 1992-03-16 | 1994-05-03 | Glenn Lillmars | Treatment of iron ore to increase recovery through the use of low molecular weight polyacrylate dispersants |
| CN101775485A (en) * | 2010-01-28 | 2010-07-14 | 刘琪 | Iron-extracting and sulfur-reducing mineral separation method by pre-separation tailing discarding of sulphur-smelting cinder and magnetizing roasting |
| CN102225358A (en) * | 2011-06-07 | 2011-10-26 | 何德武 | Ore dressing method of vanadium titanium magnetite |
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- 2012-05-23 CN CN2012101613884A patent/CN102641782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3672579A (en) * | 1970-08-10 | 1972-06-27 | Univ Minnesota | Process for beneficiating magnetite iron ore |
| US5307938A (en) * | 1992-03-16 | 1994-05-03 | Glenn Lillmars | Treatment of iron ore to increase recovery through the use of low molecular weight polyacrylate dispersants |
| CN101775485A (en) * | 2010-01-28 | 2010-07-14 | 刘琪 | Iron-extracting and sulfur-reducing mineral separation method by pre-separation tailing discarding of sulphur-smelting cinder and magnetizing roasting |
| CN102225358A (en) * | 2011-06-07 | 2011-10-26 | 何德武 | Ore dressing method of vanadium titanium magnetite |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041920A (en) * | 2012-12-19 | 2013-04-17 | 太原钢铁(集团)有限公司 | Ore dressing method and ore dressing system suitable for lean magnetite ores |
| CN103041920B (en) * | 2012-12-19 | 2016-07-20 | 太原钢铁(集团)有限公司 | A kind of beneficiation method being suitable for chromium depleted zone and ore-sorting system |
| CN106829985A (en) * | 2016-11-28 | 2017-06-13 | 赣州金环磁选设备有限公司 | A kind of method of the synthetical recovery of sandy kaoline containing mica |
| CN106829985B (en) * | 2016-11-28 | 2019-01-25 | 赣州金环磁选设备有限公司 | A method of the synthetical recovery of sandy kaoline containing mica |
| CN107344142A (en) * | 2017-07-11 | 2017-11-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore high intensity magnetic separation mine tailing online recycling utilizes technique |
| CN108672071A (en) * | 2018-05-07 | 2018-10-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of artificial magnet plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process |
| CN108940574A (en) * | 2018-08-21 | 2018-12-07 | 耒阳市百汇粉体有限公司 | A kind of production method of texture circle sand |
| CN111744639A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Mineral separation crushing process |
| CN113042179A (en) * | 2021-03-10 | 2021-06-29 | 山东域潇锆钛矿业股份有限公司 | Method for improving utilization rate of ilmenite |
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Application publication date: 20120822 |