CN114985094A - New technological process for magnesite dressing - Google Patents
New technological process for magnesite dressing Download PDFInfo
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- CN114985094A CN114985094A CN202110228674.7A CN202110228674A CN114985094A CN 114985094 A CN114985094 A CN 114985094A CN 202110228674 A CN202110228674 A CN 202110228674A CN 114985094 A CN114985094 A CN 114985094A
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- Prior art keywords
- selection
- crushing
- flotation machine
- flotation
- stirring
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- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 18
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 18
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 18
- 235000014380 magnesium carbonate Nutrition 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000000498 ball milling Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims abstract description 4
- 238000005188 flotation Methods 0.000 claims description 47
- 238000000926 separation method Methods 0.000 claims description 32
- 239000002893 slag Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 235000010755 mineral Nutrition 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a new process flow for magnesite beneficiation, which comprises the following steps: s1: crushing, namely crushing the raw materials through coarse crushing, middle crushing and fine crushing; s2: ball milling, namely, feeding the crushed raw materials into a ball mill for grinding; s3: grading, namely feeding the ore pulp ground by the ball mill to a cyclone for grading, and returning the sand return part to the ball mill for regrinding after grading; s4: stirring, namely feeding the ore pulp classified by the cyclone into a first stirring barrel for stirring. The invention has reasonable design and ingenious design, can improve the recovery rate of magnesite dressing by improving the flow, does not waste resources, completely presses and reduces the tailing discharge, saves resources, increases the enterprise benefit, and is environment-friendly and emission-reducing.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a new process flow for magnesite mineral separation.
Background
The prior mineral processing technical process of magnesite, as shown in figure 2, is basically that raw material ores are subjected to crushing, ball milling, secondary fine crushing, cyclone, stirring barrel, first-stage separation, second-stage separation, third-stage separation, fourth-stage separation and fifth-stage separation, and a vacuum filter is used for obtaining concentrate powder, wherein slag slurry in the first-stage separation, the second-stage separation, the third-stage separation, the fourth-stage separation and the fifth-stage separation sequentially enters a thickener and a filter press to obtain tailings.
Most of the existing magnesium flotation ore dressing is reverse flotation, which mainly aims to remove impurities such as silicon, iron, calcium and the like in raw ores, and the reverse flotation mainly removes silicon in the ores. The ore dressing recovery rate is 60-80% (because the ore recovery rate has large difference).
However, tests show that 30% -40% of qualified products exist in the existing flotation tailings, the existing process flow cannot be selected, so that the recovery rate of minerals is not high, resources are not utilized to the maximum extent, resource waste is caused, production benefits are reduced, and the practicability is not high.
Disclosure of Invention
The invention aims to provide a new process flow for magnesite beneficiation, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a new process flow for magnesite beneficiation comprises the following steps:
s1: crushing, namely crushing the raw materials through the procedures of coarse crushing, medium crushing and fine crushing;
s2: ball milling, namely, feeding the crushed raw materials into a ball mill for grinding;
s3: grading, namely feeding the ore pulp ground by the ball mill to a cyclone for grading, and returning the sand return part to the ball mill for regrinding after grading;
s4: stirring, namely feeding the ore pulp classified by the cyclone into a first stirring barrel for stirring;
s5: flotation, the ore pulp in a first stirring barrel enters a first flotation machine for first-stage selection, the slag pulp in the first-stage selection sequentially enters a thickener, tailings are formed in a filter press, the magnesium ore pulp in the first-stage selection subjected to reverse flotation sequentially enters a second flotation machine, a third flotation machine, a fourth flotation machine and a fifth flotation machine for second-stage selection, third-stage selection, fourth-stage selection and fifth-stage selection, the slag pulp in the second-stage selection, the third-stage selection, the fourth-stage selection and the fifth-stage selection is mixed and enters a second stirring barrel for stirring, and then the slag in the sixth flotation machine, the seventh flotation machine, the eighth flotation machine, the ninth flotation machine and the tenth flotation machine for sixth-stage selection, seventh-stage selection, eight-stage selection, nine-stage selection and ten-stage selection is mixed and enters the thickener through the second stirring barrel to form the tailings;
s6: and finally, conveying the magnesium ore pulp obtained by reverse flotation after the fifth and tenth stage separation into a vacuum filter for filtering to obtain concentrate powder.
As a further improvement scheme of the technical scheme: and the two-stage separation, the three-stage separation, the four-stage separation and the five-stage separation are conveyed to a second stirring barrel by a slurry pump (with a drop height, the slurry can flow automatically).
As a further improvement scheme of the technical scheme: the coarse crushing uses a jaw crusher, the medium crushing uses a cone crusher, and the fine crushing uses a counterattack crusher to crush, so that a final product with the size less than 12mm is obtained.
Compared with the prior art, the invention has the beneficial effects that:
in the existing flow (as shown in figure 2), the flotation is divided into five sections for mineral separation, a corresponding amount of flotation reagent is added before each section of mineral separation, the first section selected tailings account for about 40% of the total tailings, silicon is 4-5 times of the original ores, the tailings cannot be re-selected through experiments, the tailings from the second section to the fifth section account for about 60% of the total tailings, silicon is 1.5-2 times of the original ores, the tailings are re-selected once, the yield is about 50% -60%, according to the results obtained by the experiments, the yield of concentrate powder is lower as the silicon content of the original ores is higher, the recovery rate is lower, the tailings contain more qualified ore powder, the existing flow (as shown in figure 2) shows that the tailings from the first section to the fifth section are separated and gathered together, the concentration is between 6% -8%, the tailings are conveyed to a thickener to a filter press for drying through a slurry pump, the flow (as shown in figure 1) after transformation is that the second section to the fifth section in the existing flow are gathered together, the magnesite ore dressing device is reasonable in design and ingenious in design, through flow improvement, the recovery rate of magnesite ore dressing can be improved, resources are not wasted, dry pressing is carried out, tailing discharge is reduced, resources are saved, enterprise benefits are increased, and environmental protection and emission reduction can be achieved.
Drawings
FIG. 1 is a flow chart of a new process for magnesite beneficiation according to the present invention;
fig. 2 is a flow chart of an original magnesite beneficiation process.
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. 1-2, in an embodiment of the present invention, a new process flow for magnesite beneficiation includes the following steps:
s1: crushing, namely crushing the raw materials through the procedures of coarse crushing, medium crushing and fine crushing;
s2: ball milling, namely, feeding the crushed raw materials into a ball mill for grinding;
s3: grading, namely feeding the ore pulp ground by the ball mill to a cyclone for grading, and returning the sand returning part to the ball mill for regrinding after grading;
s4: stirring, namely feeding the ore pulp classified by the cyclone into a first stirring barrel for stirring;
s5: flotation, the ore pulp in a first stirring barrel enters a first flotation machine for first-stage selection, the slag pulp in the first-stage selection sequentially enters a thickener, tailings are formed in a filter press, the magnesium ore pulp in the first-stage selection subjected to reverse flotation sequentially enters a second flotation machine, a third flotation machine, a fourth flotation machine and a fifth flotation machine for second-stage selection, third-stage selection, fourth-stage selection and fifth-stage selection, the slag pulp in the second-stage selection, the third-stage selection, the fourth-stage selection and the fifth-stage selection is mixed and enters a second stirring barrel for stirring, and then the slag in the sixth flotation machine, the seventh flotation machine, the eighth flotation machine, the ninth flotation machine and the tenth flotation machine for sixth-stage selection, seventh-stage selection, eight-stage selection, nine-stage selection and ten-stage selection is mixed and enters the thickener through the second stirring barrel to form the tailings;
s6: and finally, conveying the magnesium ore pulp obtained by reverse flotation after the fifth and tenth stage separation into a vacuum filter for filtering to obtain concentrate powder.
Referring to fig. 1, the slurry is fed to the second mixer through a second-stage separation, a third-stage separation, a fourth-stage separation and a fifth-stage separation (with a drop height to allow the slurry to flow automatically).
Referring to fig. 1, a jaw crusher is used for coarse crushing, a cone crusher is used for medium crushing, and a reaction crusher is used for fine crushing, so that a final product with the thickness less than 12mm is obtained.
The working principle of the invention is as follows:
in the existing flow (as shown in figure 2), the flotation is divided into five sections for mineral separation, a corresponding amount of flotation reagent is added before each section of mineral separation, the first section selected tailings account for about 40 percent of the total tailings, silicon is 4-5 times of the original ore, the tailings cannot be re-separated through experiments, the tailings in the second section to the fifth section account for about 60 percent of the total tailings, and the silicon is 1.5-2 times of the original ore, the tailings are re-separated once, the yield is about 50-60 percent, according to the results obtained by the experiments, the yield of concentrate powder is lower as the silicon content of the original ore is higher, the recovery rate is lower, the tailings contain more qualified mineral powder, the existing flow (as shown in figure 2) shows that the first section to the fifth section are separated and collected together, the concentration is between 6-8 percent at the moment, the tailings are conveyed to a thickener to a filter press for drying through a slag pulp pump, the flow (as shown in figure 1) after transformation, the second section to the five sections in the existing flow are collected together, the magnesite ore dressing device is reasonable in design and ingenious in design, through flow improvement, the recovery rate of magnesite ore dressing can be improved, resources are not wasted, dry pressing is carried out, tailing discharge is reduced, resources are saved, enterprise benefits are increased, and environmental protection and emission reduction can be achieved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (3)
1. A new process flow for magnesite beneficiation is characterized by comprising the following steps:
s1: crushing, namely crushing the raw materials through the procedures of coarse crushing, medium crushing and fine crushing;
s2: ball milling, namely, feeding the crushed raw materials into a ball mill for grinding;
s3: grading, namely feeding the ore pulp ground by the ball mill to a cyclone for grading, and returning the sand return part to the ball mill for regrinding after grading;
s4: stirring, namely feeding the ore pulp classified by the cyclone into a first stirring barrel for stirring;
s5: flotation, ore pulp in a first stirring barrel enters a first flotation machine for primary selection, slag pulp of the first selection sequentially enters a thickener, tailings are formed in a filter press, magnesium ore pulp subjected to reverse flotation in the first selection sequentially enters a second flotation machine, a third flotation machine, a fourth flotation machine and a fifth flotation machine for secondary selection, tertiary selection, fourth selection and fifth selection, slag pulp of the secondary selection, tertiary selection, fourth selection and fifth selection is mixed and enters a second stirring barrel for stirring, and then slag after the slag sequentially enters a sixth flotation machine, a seventh flotation machine, an eighth flotation machine, a ninth flotation machine and a tenth flotation machine through a second stirring barrel for sixth selection, seventh selection, eighth selection, ninth selection and tenth selection, slag after the sixth selection, seventh selection, eighth selection, ninth selection and tenth selection is mixed and enters the thickener to form the tailings;
s6: and finally, conveying the magnesium ore slurry obtained by the reverse flotation after the fifth-stage separation and the tenth-stage separation to a vacuum filter for filtering to obtain concentrate powder.
2. The new process flow for magnesite beneficiation according to claim 1, wherein the second-stage separation, the third-stage separation, the fourth-stage separation and the fifth-stage separation are carried to the second mixing tank by a slurry pump (with a drop height, the slurry can flow automatically).
3. The new process flow for magnesite beneficiation according to claim 1, wherein the coarse crushing uses a jaw crusher, the middle crushing uses a cone crusher, and the fine crushing uses a reaction crusher for crushing, so that a final product with a size smaller than 12mm is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228674.7A CN114985094A (en) | 2021-03-02 | 2021-03-02 | New technological process for magnesite dressing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110228674.7A CN114985094A (en) | 2021-03-02 | 2021-03-02 | New technological process for magnesite dressing |
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| CN114985094A true CN114985094A (en) | 2022-09-02 |
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| CN202110228674.7A Withdrawn CN114985094A (en) | 2021-03-02 | 2021-03-02 | New technological process for magnesite dressing |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102011A (en) * | 1986-03-24 | 1987-11-11 | 冶金工业部马鞍山矿山研究院 | Flotation technology for magnesite |
| CN1994580A (en) * | 2006-12-27 | 2007-07-11 | 沈阳铝镁设计研究院 | Silicon removing process for dressing low-grade magnesite |
| CN102773169A (en) * | 2012-08-06 | 2012-11-14 | 辽宁科技大学 | Collecting agent capable of achieving iron removal during reverse flotation and desiliconization of magnesite ore and preparation method thereof |
| CN103212486A (en) * | 2013-05-06 | 2013-07-24 | 辽宁省地质矿产研究院 | Method for low-grade magnesite flotation |
| CN103386360A (en) * | 2013-07-23 | 2013-11-13 | 沈阳鑫博工业技术发展有限公司 | Floatation method for low-grade magnesite |
| CN107413514A (en) * | 2017-06-19 | 2017-12-01 | 中冶北方（大连）工程技术有限公司 | A kind of high-silicon high calcium magnesite low cost ore-dressing technique |
| CN108246510A (en) * | 2018-03-23 | 2018-07-06 | 北京矿冶科技集团有限公司 | A kind of method for improving magnesite flotation recovery rate |
| CN110302904A (en) * | 2019-06-28 | 2019-10-08 | 武汉理工大学 | A kind of method of high-grade basic magnesium carbonate mine drop calcium purification |
-
2021
- 2021-03-02 CN CN202110228674.7A patent/CN114985094A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102011A (en) * | 1986-03-24 | 1987-11-11 | 冶金工业部马鞍山矿山研究院 | Flotation technology for magnesite |
| CN1994580A (en) * | 2006-12-27 | 2007-07-11 | 沈阳铝镁设计研究院 | Silicon removing process for dressing low-grade magnesite |
| CN102773169A (en) * | 2012-08-06 | 2012-11-14 | 辽宁科技大学 | Collecting agent capable of achieving iron removal during reverse flotation and desiliconization of magnesite ore and preparation method thereof |
| CN103212486A (en) * | 2013-05-06 | 2013-07-24 | 辽宁省地质矿产研究院 | Method for low-grade magnesite flotation |
| CN103386360A (en) * | 2013-07-23 | 2013-11-13 | 沈阳鑫博工业技术发展有限公司 | Floatation method for low-grade magnesite |
| CN107413514A (en) * | 2017-06-19 | 2017-12-01 | 中冶北方（大连）工程技术有限公司 | A kind of high-silicon high calcium magnesite low cost ore-dressing technique |
| CN108246510A (en) * | 2018-03-23 | 2018-07-06 | 北京矿冶科技集团有限公司 | A kind of method for improving magnesite flotation recovery rate |
| CN110302904A (en) * | 2019-06-28 | 2019-10-08 | 武汉理工大学 | A kind of method of high-grade basic magnesium carbonate mine drop calcium purification |
Non-Patent Citations (1)
| Title |
|---|
| 纪振明;田鹏杰;陈洲;潘克俭;印万忠;: "某低品位菱镁矿浮选提纯试验研究", 矿冶, no. 02, pages 30 - 33 * |
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Application publication date: 20220902 |