CN111905917A - System and method for high production efficiency of two-stage grinding of magnetic ore - Google Patents
System and method for high production efficiency of two-stage grinding of magnetic ore Download PDFInfo
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- CN111905917A CN111905917A CN202010770498.5A CN202010770498A CN111905917A CN 111905917 A CN111905917 A CN 111905917A CN 202010770498 A CN202010770498 A CN 202010770498A CN 111905917 A CN111905917 A CN 111905917A
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Abstract
The invention discloses a system and a method for high production efficiency of two-stage grinding of magnetic ores, and relates to the technical field of ore dressing processes. The system and the method for high production efficiency of the second-stage grinding of the magnetic ore comprise a hydrocyclone, a high-efficiency magnetic separator, a first high-frequency fine screen, a second-stage grinding machine, a second high-frequency fine screen and an elutriation machine. The high-production-efficiency system and the method for the second-stage grinding of the magnetic ores are used for improving the production efficiency of the second-stage grinding of the magnetic ores, the hydrocyclone and the high-frequency fine screen are combined for classification, and the high-efficiency magnetic separator and the elutriator are used for refining, settled sand of the hydrocyclone is checked and screened through the high-frequency fine screen, the mud content of 200 meshes in the settled sand is low, the settled sand can enter a refining stage in advance and does not enter a grinding machine for regrinding, the load of the grinding machine is reduced, the hydrocyclone overflows and enters the high-efficiency magnetic separator for separation, and concentrate of the high-efficiency magnetic separator is separated through the high-frequency fine screen and the elutriator, so that the grinding efficiency.
Description
Technical Field
The invention relates to the technical field of ore dressing processes, in particular to a system and a method for high production efficiency of two-stage grinding of magnetic ores.
Background
In ore grinding classification, a concentrating mill widely uses a hydrocyclone as a classification device, the classification efficiency of the hydrocyclone is low, and products containing a large number of qualified grain grades in settled sand enter a mill for regrinding, so that the cyclic load of the mill is increased, and the production efficiency of the whole two-stage ore grinding is reduced.
In the grinding and selecting process of the Baixiangshan separation plant, a two-stage grinding-stage sorting-fine screening-elutriation machine refining process is adopted, two-stage classification equipment adopts a hydrocyclone for classification, and settled sand also contains a large amount of qualified size fraction products and enters a grinding machine for regrinding. The content of-200 meshes in the settled sand reaches 50% -60%, the grade is 66% -68%, the settled sand returns to the ball mill for re-grinding, the over-grinding phenomenon is easy to occur, the recovery rate is influenced, the load of the two-stage ball mill is overlarge, and the release capacity of the whole system is limited.
Therefore, the applicant inherits the abundant design development and actual manufacturing experience of the related industry for many years, researches and improves the existing structure and deficiency, and provides a system and a method for high production efficiency of two-stage grinding of magnetic ore so as to achieve the aim of higher practical value.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a system and a method for high production efficiency of two-stage ore grinding of magnetic ores, which solve the problems that in the traditional one-stage ore grinding and grading refining process, settled sand returns to a ball mill for regrinding, the over-grinding phenomenon is easy to occur, the recovery rate is influenced, the load of the two-stage ball mill is too large, and the release capacity of the whole system is limited.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a system for high production efficiency of two-stage grinding of magnetic ores, which comprises a hydrocyclone, a high-efficiency magnetic separator, a first high-frequency fine screen, a two-stage grinding machine, a second high-frequency fine screen and an elutriation machine, the top of the hydrocyclone is provided with an overflow port and is connected with an inlet of a high-efficiency magnetic separator, the bottom of the hydrocyclone is connected with a first high-frequency fine screen, the right end outlet of the first high-frequency fine screen is connected with the inlet of a two-stage grinding machine, the outlet of the two-stage grinding machine is connected with the inlet of a hydrocyclone, the left end outlet of the first high-frequency fine screen is connected with the inlet of the elutriation machine, the high-efficiency magnetic separator can separate concentrate and tailings, the concentrate enters an inlet of a second high-frequency fine screen, an outlet at the right end of the second high-frequency fine screen is connected with an inlet of a two-stage grinding machine, and the outlet at the left end of the second high-frequency fine screen is connected with the inlet of the elutriator, and the outlet at the right end of the elutriator is connected with the inlet of the two-stage mill.
Preferably, the outlet at the right end of the first high-frequency fine screen is an outlet which does not pass through the screen, and the outlet at the left end of the first high-frequency fine screen is an outlet which passes through the screen.
Preferably, the outlet at the right end of the second high-frequency fine screen is an outlet which does not pass through the screen, and the outlet at the left end of the second high-frequency fine screen is an outlet which passes through the screen.
Preferably, the first high-frequency fine sieve has a sieve opening diameter of 0.12mm, and the second high-frequency fine sieve has a sieve opening diameter of 0.075 mm.
A method for high production efficiency of second-stage grinding of magnetic ores comprises the system and comprises the following steps:
the method comprises the following steps: a magnetic fine product is diluted into ore pulp in a pump pool and then is sent to a hydrocyclone for classification by a pump;
step two: conveying the overflow product of the hydrocyclone to a sorting procedure of an efficient magnetic separator to sort out concentrate and tailings, and conveying the concentrate sorted out by the efficient magnetic separator to a second high-frequency fine sieve;
step three: sending the settled sand of the cyclone to a first high-frequency fine screen, enabling products below the first high-frequency fine screen to enter a sorting procedure of an elutriation machine, and enabling products above the screen to enter a two-stage mill for regrinding and then sending into the hydraulic cyclone;
step four: the oversize products of the second sieve high-frequency fine sieve are sent into a hydraulic cyclone after being subjected to secondary ball milling and regrinding, and undersize products directly enter an elutriation machine for refining;
step five: returning tailings washed out by the elutriation machine to the mill for regrinding and then sending the tailings into a hydraulic cyclone;
step six: and concentrating the concentrate washed out by the elutriation machine.
Preferably, the oversize products of the first high-frequency fine sieve and the second high-frequency fine sieve refer to a plus 200-mesh unqualified fraction, and need to be ground again to meet the requirements of the subsequent sorting process, and the undersize products of the first high-frequency fine sieve and the second high-frequency fine sieve refer to a minus 200-mesh qualified fraction, and the granularity meets the requirements of the subsequent sorting process.
(III) advantageous effects
The invention provides a system and a method for high production efficiency of two-stage grinding of magnetic ores. The method has the following beneficial effects:
the high-production-efficiency system and the method for the second-stage grinding of the magnetic ores are used for improving the production efficiency of the second-stage grinding of the magnetic ores, the hydrocyclone and the high-frequency fine screen are combined for classification, and the high-efficiency magnetic separator and the elutriator are used for refining, settled sand of the hydrocyclone is checked and screened through the high-frequency fine screen, the mud content of 200 meshes in the settled sand is low, the settled sand can enter a refining stage (the elutriator separation process) in advance, the settled sand does not enter a grinding machine for regrinding, the load of the grinding machine is reduced, the hydrocyclone overflows and enters the high-efficiency magnetic separator for separation, and the concentrate of the high-efficiency magnetic separator is separated through the high-frequency fine screen and the elutriator.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a system for high production efficiency of two-stage grinding of magnetic ores comprises a hydrocyclone, a high-efficiency magnetic separator, a first high-frequency fine screen, a two-stage grinding machine, a second high-frequency fine screen and an elutriator, wherein the top of the hydrocyclone is provided with an overflow port and is connected with an inlet of the high-efficiency magnetic separator, the bottom of the hydrocyclone is connected with the first high-frequency fine screen, a right-end outlet of the first high-frequency fine screen is connected with an inlet of the two-stage grinding machine, an outlet of the two-stage grinding machine is connected with an inlet of the hydrocyclone, a left-end outlet of the first high-frequency fine screen is connected with an inlet of the elutriator, the high-efficiency magnetic separator can separate out concentrate and tailings, the concentrate enters the inlet of the second high-frequency fine screen, a right-end outlet of the second high-frequency fine screen is connected with the inlet of the two-stage grinding machine, a left-end outlet of the first high-frequency fine screen is an outlet which does not pass through a screen, the export of second high frequency fine screen right-hand member is the export that does not pass through the screen cloth, and the export of second high frequency fine screen left end is the export that passes through the screen cloth, and the sieve mesh diameter of first high frequency fine screen is 0.12mm, and the sieve mesh diameter of second high frequency fine screen is 0.075 mm.
A method for high production efficiency of second-stage grinding of magnetic ores comprises the system and comprises the following steps:
the method comprises the following steps: a magnetic fine product is diluted into ore pulp in a pump pool and then is sent to a hydrocyclone for classification by a pump;
step two: conveying the overflow product of the hydrocyclone to a sorting procedure of an efficient magnetic separator to sort out concentrate and tailings, and conveying the concentrate sorted out by the efficient magnetic separator to a second high-frequency fine sieve;
step three: sending the settled sand of the cyclone to a first high-frequency fine screen, enabling products below the first high-frequency fine screen to enter a sorting procedure of an elutriation machine, and enabling products above the screen to enter a two-stage mill for regrinding and then sending into the hydraulic cyclone;
step four: the oversize products of the second sieve high-frequency fine sieve are sent into a hydraulic cyclone after being subjected to secondary ball milling and regrinding, and undersize products directly enter an elutriation machine for refining;
step five: returning tailings washed out by the elutriation machine to the mill for regrinding and then sending the tailings into a hydraulic cyclone;
step six: and concentrating the concentrate washed out by the elutriation machine.
The oversize products of the first high-frequency fine screen and the second high-frequency fine screen are unqualified grain grades of +200 meshes, and need to be ground again to meet the requirements of the subsequent sorting process, and the undersize products of the first high-frequency fine screen and the second high-frequency fine screen are qualified grain grades of-200 meshes, and the grain sizes meet the requirements of the subsequent sorting process.
In conclusion, the system and the method for high production efficiency of the second-stage grinding of the magnetic ore improve the production efficiency of the second-stage grinding of the magnetic ore, utilize the combined classification of the hydrocyclone and the high-frequency fine screen and the separation process of the high-efficiency magnetic separator and the elutriator for refining, the sand setting of the hydrocyclone is checked and screened by the high-frequency fine screen, the mud content of minus 200 meshes in the sand setting is low, the sand setting can enter a refining stage (separation process of the elutriator) in advance, the sand setting can not enter a mill for regrinding, the load of the mill is reduced, the overflow of the hydrocyclone enters the high-efficiency magnetic separator for separation, the concentrate of the high-efficiency magnetic separator is separated by the high-frequency fine screen and the elutriator, the.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a high production efficiency's of magnetic ore second grade ore grinding system, includes hydrocyclone, high-efficient magnet separator, first high frequency fine screen, second section mill, second high frequency fine screen and elutriation machine, its characterized in that: the hydrocyclone top is provided with the overflow mouth and links to each other with high-efficient magnet separator entry, the hydrocyclone bottom links to each other with first high frequency fine screen, first high frequency fine screen right-hand member export links to each other with the second section mill import, the second section mill export links to each other with the hydrocyclone import, first high frequency fine screen left end export links to each other with the elutriator import, high-efficient magnet separator can elect concentrate and tailing, the concentrate gets into the import of the second high frequency fine screen, the export of the second high frequency fine screen right-hand member links to each other with the second section mill import, the export of the second high frequency fine screen left end links to each other with the elutriator import, elutriator right-hand member export links to each other with the second section mill import.
2. The system for high production efficiency of the second-stage grinding of the magnetite according to claim 1, wherein: the outlet at the right end of the first high-frequency fine screen is an outlet which does not pass through the screen, and the outlet at the left end of the first high-frequency fine screen is an outlet which passes through the screen.
3. The system for high production efficiency of the second-stage grinding of the magnetite according to claim 1, wherein: the outlet at the right end of the second high-frequency fine screen is an outlet which does not pass through the screen, and the outlet at the left end of the second high-frequency fine screen is an outlet which passes through the screen.
4. The system for high production efficiency of the second-stage grinding of the magnetite according to claim 1, wherein: the diameter of the sieve pores of the first high-frequency fine sieve is 0.12mm, and the diameter of the sieve pores of the second high-frequency fine sieve is 0.075 mm.
5. A method for high production efficiency of two-stage grinding of magnetic ore comprises the system, and is characterized in that: the method comprises the following steps:
the method comprises the following steps: a magnetic fine product is diluted into ore pulp in a pump pool and then is sent to a hydrocyclone for classification by a pump;
step two: conveying the overflow product of the hydrocyclone to a sorting procedure of an efficient magnetic separator to sort out concentrate and tailings, and conveying the concentrate sorted out by the efficient magnetic separator to a second high-frequency fine sieve;
step three: sending the settled sand of the cyclone to a first high-frequency fine screen, enabling products below the first high-frequency fine screen to enter a sorting procedure of an elutriation machine, and enabling products above the screen to enter a two-stage mill for regrinding and then sending into the hydraulic cyclone;
step four: the oversize products of the second sieve high-frequency fine sieve are sent into a hydraulic cyclone after being subjected to secondary ball milling and regrinding, and undersize products directly enter an elutriation machine for refining;
step five: returning tailings washed out by the elutriation machine to the mill for regrinding and then sending the tailings into a hydraulic cyclone;
step six: and concentrating the concentrate washed out by the elutriation machine.
6. The method for high production efficiency of second-stage grinding of magnetic ore according to claim 5, characterized in that: the oversize products of the first high-frequency fine screen and the second high-frequency fine screen are unqualified grain grades of +200 meshes, and can meet the requirements of the subsequent sorting process only by grinding, and the undersize products of the first high-frequency fine screen and the second high-frequency fine screen are qualified grain grades of-200 meshes, and the grain sizes meet the requirements of the subsequent sorting process.
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| CN202010770498.5A CN111905917A (en) | 2020-08-04 | 2020-08-04 | System and method for high production efficiency of two-stage grinding of magnetic ore |
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| CN103272694A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Magnetic-gravity separation technology for Anshan type lean magnetite |
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| CN106391298A (en) * | 2016-09-20 | 2017-02-15 | 昆明理工大学 | Closed circuit ore grinding classification method |
| CN110694789A (en) * | 2019-11-18 | 2020-01-17 | 安徽马钢矿业资源集团有限公司 | Ore dressing method for magnetite |
| CN212791379U (en) * | 2020-08-04 | 2021-03-26 | 安徽马钢矿业资源集团姑山矿业有限公司 | System for high production efficiency of two-stage ore grinding of magnetic ore |
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2020
- 2020-08-04 CN CN202010770498.5A patent/CN111905917A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2132742C1 (en) * | 1997-06-10 | 1999-07-10 | Горный институт Кольского научного центра РАН | Method of concentrating magnetite ores |
| CN102698871A (en) * | 2012-06-17 | 2012-10-03 | 鞍钢集团矿业公司 | Ore dressing technology for treating vanadium titano-magnetite |
| CN102755927A (en) * | 2012-06-25 | 2012-10-31 | 河北钢铁集团矿业有限公司 | Method for improving recovery ratio of metal in process of iron ore beneficiation |
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| CN103272694A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Magnetic-gravity separation technology for Anshan type lean magnetite |
| CN106345606A (en) * | 2016-08-26 | 2017-01-25 | 中冶北方（大连）工程技术有限公司 | Method for improving quality of mineral processing and production capacity of magnetite concentrating mill |
| CN106391298A (en) * | 2016-09-20 | 2017-02-15 | 昆明理工大学 | Closed circuit ore grinding classification method |
| CN110694789A (en) * | 2019-11-18 | 2020-01-17 | 安徽马钢矿业资源集团有限公司 | Ore dressing method for magnetite |
| CN212791379U (en) * | 2020-08-04 | 2021-03-26 | 安徽马钢矿业资源集团姑山矿业有限公司 | System for high production efficiency of two-stage ore grinding of magnetic ore |
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