CN112206926A - Short-process beneficiation method for low-grade fine flake graphite - Google Patents
Short-process beneficiation method for low-grade fine flake graphite Download PDFInfo
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- CN112206926A CN112206926A CN202010967136.5A CN202010967136A CN112206926A CN 112206926 A CN112206926 A CN 112206926A CN 202010967136 A CN202010967136 A CN 202010967136A CN 112206926 A CN112206926 A CN 112206926A
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- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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- 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
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- 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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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Abstract
The invention discloses a short-flow mineral separation method of low-grade fine flake graphite, which comprises the steps of primary coarse grinding and rough separation, secondary grinding and secondary fine separation, classification, primary ultrasonic treatment, secondary fine separation, sectional merging and returning treatment of middlings, wherein the fixed carbon content of finally obtained concentrate is 94-95%, and the total recovery rate of the concentrate is 90-94%. The invention adopts ultrasonic treatment to replace subsequent regrinding operation, strengthens the ore grinding efficiency, shortens the process flow, simultaneously carries out classification treatment before the ultrasonic treatment, separates out the large flake graphite with the particle size of plus 100 meshes in advance, has low energy consumption and simple process flow, simultaneously improves the protection rate of the large flake graphite, effectively reduces the ore dressing cost of graphite and enables the fine flake graphite to be economically and efficiently utilized.
Description
Technical Field
The invention relates to the technical field of graphite beneficiation, in particular to a short-process beneficiation method for low-grade fine flake graphite.
Background
The reserves of the graphite ores in China account for 75 percent of the total reserves in the world, and the production capacity accounts for 72 percent of the total production in the world, and the graphite ores are one of few ores with international competitive advantages in China. Graphite is a strategic resource, is a necessary mineral raw material for traditional industry and strategic emerging industry due to its special properties, and is widely applied to the field of scientific and technological engineering.
Natural graphite is classified by its crystalline form into crystalline flake graphite, cryptocrystalline graphite (earthy graphite), and dense crystalline graphite. The scale graphite is divided into large scale graphite (+ 100 meshes) and fine scale graphite (-100 meshes), and the fine scale graphite in China has abundant resource reserves and is widely distributed in Heilongjiang, Shandong, inner Mongolia, Sichuan and the like. Because the average grade of the fine flake graphite is low, the embedded granularity is generally fine, in order to obtain the final concentrate of the graphite with higher grade, the mineral separation process of the fine flake graphite mostly adopts a longer sorting flow, such as seven-grinding eight-selection, even eight-grinding nine-selection, the longer stage grinding-stage flotation process greatly increases the energy consumption, greatly increases the equipment cost, has more middlings, easily causes the instability of the mineral separation flow, and reduces the overall production efficiency.
Disclosure of Invention
The invention aims to provide a short-flow mineral separation method for low-grade fine flake graphite, which can enhance the ore grinding efficiency, shorten the ore grinding flow, reduce the overall energy consumption and enable the fine flake graphite to be economically and efficiently utilized according to the ore properties of raw ores.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a short-flow beneficiation method for low-grade fine flake graphite comprises the following steps:
s1, crushing the graphite raw ore to-2 mm, and performing primary coarse grinding, wherein the coarse grinding concentration is 45-55%, and the grinding fineness is-0.074 mm, and the content of the grinding ore is 40-45%; adding kerosene and pine oil into the rough-ground raw ore, fully stirring, and then performing rough concentration operation, wherein the rough concentration is 20-25%, and the rough concentration time is 3-5 min, so as to obtain rough concentrate and tailings 1; the dosage of the kerosene is 350-450 g/t, and the dosage of the pine oil is 30-50 g/t;
s2, performing regrinding I operation on the rough concentrate obtained in the step S1, wherein the concentration of the regrinding I is 22-27%, and the content of the grinded ore is 60% -65% with the fineness of-0.074 mm; transferring the product obtained by the regrinding I into a flotation machine for a first step of concentration, wherein the flotation concentration is 12-16%, and the time of the concentration I is 3-4 min, so as to obtain concentrate I and middling 1;
s3, sending the concentrate I obtained in the step S2 into an ore mill for regrinding II, wherein the concentration of the ground ore is 16-20%, and the fineness of the ground ore is 62% -67%; after regrinding II, transferring the ground ore product into a flotation machine for a second step of concentration II, wherein the flotation concentration of the second step of concentration II is 10-15%, and the time of the second step of concentration II is 3-4 min, so that concentrate II and middling 2 are obtained;
s4, pre-grading the concentrate II obtained in the step S3, and directly using the concentrate II as the final concentrate of the large-scale graphite without performing subsequent grading operation on the concentrate with the diameter of +0.15 mm; putting the part of the powder with the particle size of-0.15 mm into an ultrasonic reaction kettle for ultrasonic treatment, wherein the treatment concentration is 15-20%, the ultrasonic time is 15-20 min, and the content of the powder with the particle size of-0.074 mm is 80-85%;
the ore pulp obtained after the ultrasonic treatment enters a flotation machine to carry out concentration III operation, the concentration of concentration III flotation is 10-13%, the flotation time of concentration III flotation is 3-4 min, and concentration III concentrate and middling 3 are obtained;
putting the concentrate III in a flotation machine for concentration IV operation, wherein the concentration of the concentrate IV is 9-12%, and the time of the concentrate IV flotation is 3-4 min, so as to obtain final graphite product concentrate and middling 4;
s5, combining the obtained middlings 1 and 2, adding kerosene and terpineol oil for scavenging, wherein the scavenging concentration is 11% -13%, the scavenging time is 2-3 min, and obtaining middlings 5 and tailings 2, wherein the dosage of the kerosene is 80-120 g/t, and the dosage of the terpineol oil is 10-30 g/t;
and S6, returning the obtained middling 5 to the roughing operation of the step S1, combining the middling 3 and the middling 4, returning to the concentration II operation of the step 3, and sequentially carrying out the subsequent operation processes to obtain the final graphite product concentrate.
Further, the fixed carbon content of the graphite raw ore is 6-12%.
Further, the rough grinding and regrinding operation employs a conical ball mill.
Further, XRF single-groove flotation machines are adopted in the roughing, selecting and scavenging processes.
Further, the ultrasonic treatment adopts an ultrasonic reaction kettle.
The invention has the beneficial effects that:
the invention adopts two-stage selection to throw off most gangue minerals, adopts ultrasonic treatment to replace regrinding in subsequent operation, strengthens the ore grinding efficiency, shortens the ore grinding flow, reduces the overall energy consumption and reduces the production cost; the method is adopted to sort the fine flake graphite raw ore with the fixed carbon content of 6-12% to obtain graphite concentrate with the fixed carbon content of 94-95%, and the total recovery rate of the concentrate is 90-94%.
According to the ore property of the raw ore, the pre-grading operation is set before the ultrasonic treatment, and the large-scale graphite is sieved out in advance, so that the large-scale graphite is prevented from being damaged by the ultrasonic treatment, and the grading utilization rate of graphite resources is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
Example one
As shown in fig. 1, the invention provides a short-flow beneficiation method for low-grade fine flake graphite, which comprises the following steps:
s1, crushing the low-grade fine flake graphite raw ore with the fixed carbon content of 10.50% to-2 mm, and then roughly grinding by using a conical ball mill, wherein the rough grinding concentration is 50%, and the grinding fineness is-0.074 mm, and the content of the grinding ore is 43.27%; adding kerosene and pinitol oil into the crude ore after coarse grinding, wherein the kerosene is used as a collecting agent, the pinitol oil is used as a foaming agent, performing rough concentration operation after fully stirring, the rough concentration is 20%, and the rough concentration time is 3min, so as to obtain rough concentrate and tailings 1; the dosage of the kerosene is 400g/t, and the dosage of the pine oil is 40 g/t;
s2, performing regrinding I operation on the rough concentrate obtained in the step S1, wherein the concentration of the regrinding I is 25%, and the content of the grinded ore fineness is-0.074 mm, and is 63.28%; transferring the product obtained by the regrinding I into a flotation machine to carry out a first step of concentration I, wherein the flotation concentration is 15%, and the first time of concentration is 3min, so as to obtain concentrate I and middling 1;
s3, sending the concentrate I obtained in the step S2 into an ore mill for regrinding II, wherein the ore milling concentration is 18%, and the ore milling fineness is 64.42%; after regrinding II, transferring the grinded product into a flotation machine for a second step of concentration II, wherein the flotation concentration of the concentration II is 15%, and the time of the concentration II is 3min, so as to obtain concentrate II and middlings 2;
s4, pre-grading the concentrate II obtained in the step S3, and directly using the concentrate II as the final concentrate of the large-scale graphite without performing subsequent grading operation on the concentrate with the diameter of +0.15 mm; putting the part of minus 0.15mm into an ultrasonic reaction kettle for ultrasonic treatment, wherein the treatment concentration is 20 percent, the ultrasonic time is 20min, the fineness is minus 0.074mm, and the content is 83.96 percent;
the ore pulp obtained after the ultrasonic treatment enters a flotation machine to carry out concentration III operation, the concentration of concentration III flotation is 12%, the flotation time of concentration III flotation is 3min, and concentration III concentrate and middling 3 are obtained;
putting the concentrate III to a flotation machine for concentration IV operation without regrinding, wherein the concentration of the concentrate IV is 10%, and the time of the concentrate IV is 3min, so as to obtain the final graphite product concentrate and middlings 4;
s5, combining the obtained middlings 1 and 2, adding kerosene and pine oil for scavenging, wherein the scavenging concentration is 12.6%, the scavenging time is 2min, and obtaining middlings 5 and tailings 2, wherein the dosage of the kerosene is 100g/t, and the dosage of the pine oil is 20 g/t;
and S6, returning the obtained middling 5 to the roughing operation of the step S1, combining the middling 3 and the middling 4, returning to the concentration II operation of the step 3, and sequentially carrying out the subsequent operation processes to obtain the final graphite product concentrate.
The product index obtained in this example is shown in table 1:
TABLE 1
Example two
As shown in fig. 1, the invention provides a short-flow beneficiation method for low-grade fine flake graphite, which comprises the following steps:
s1, crushing the low-grade fine flake graphite raw ore with the fixed carbon content of 10.31% to minus 2mm, and roughly grinding by using a cone ball mill, wherein the rough grinding concentration is 50%, and the grinding fineness is-0.074 mm, and the content is 44.72%; adding kerosene and pinitol oil into the crude ore after coarse grinding, wherein the kerosene is used as a collecting agent, the pinitol oil is used as a foaming agent, performing rough concentration operation after fully stirring, the rough concentration is 20%, and the rough concentration time is 3min, so as to obtain rough concentrate and tailings 1; the dosage of the kerosene is 410g/t, and the dosage of the pine oil is 45 g/t;
s2, performing regrinding I operation on the rough concentrate obtained in the step S1, wherein the concentration of the regrinding I is 25%, and the content of the grinding fineness of-0.074 mm is 62.79%; transferring the product obtained by the regrinding I into a flotation machine to carry out a first step of concentration I, wherein the flotation concentration is 15%, and the first time of concentration is 3min, so as to obtain concentrate I and middling 1;
s3, sending the concentrate I obtained in the step S2 into an ore mill for regrinding II, wherein the ore milling concentration is 18%, and the ore milling fineness is 63.98%; after regrinding II, transferring the grinded product into a flotation machine for a second step of concentration II, wherein the flotation concentration of the concentration II is 15%, and the time of the concentration II is 3min, so as to obtain concentrate II and middlings 2;
s4, pre-grading the concentrate II obtained in the step S3, and directly using the concentrate II as the final concentrate of the large-scale graphite without performing subsequent grading operation on the concentrate with the diameter of +0.15 mm; putting the part of-0.15 mm into an ultrasonic reaction kettle for ultrasonic treatment, wherein the treatment concentration is 15%, the ultrasonic time is 20min, the fineness is-0.074 mm, and the content is 82.78%;
the ore pulp obtained after the ultrasonic treatment enters a flotation machine to carry out concentration III operation, the concentration of concentration III flotation is 11.36 percent, the time of concentration III flotation is 3min, and concentration III concentrate and middling 3 are obtained;
putting the concentrate III to a flotation machine for concentration IV operation without regrinding, wherein the concentration of the concentrate IV is 9.78%, and the time of the concentrate IV flotation is 3min, so as to obtain the final graphite product concentrate and middling 4;
s5, combining the obtained middlings 1 and 2, adding kerosene and pine oil for scavenging, wherein the scavenging concentration is 11.68%, and the scavenging time is 2min, so as to obtain middlings 5 and tailings 2, wherein the dosage of the kerosene is 100g/t, and the dosage of the pine oil is 20 g/t;
and S6, returning the obtained middling 5 to the roughing operation of the step S1, combining the middling 3 and the middling 4, returning to the concentration II operation of the step 3, and sequentially carrying out the subsequent operation processes to obtain the final graphite product concentrate.
The product index obtained in this example is shown in table 2:
TABLE 2
The results show that the fixed carbon content and the recovery rate of the graphite concentrate are high; the ultrasonic treatment is adopted to replace partial regrinding, the ore grinding efficiency is enhanced, the ore grinding flow is shortened, the overall energy consumption is reduced, the production cost is reduced, and the effect is obvious.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.
Claims (5)
1. A short-flow beneficiation method for low-grade fine flake graphite is characterized by comprising the following steps:
s1, crushing the graphite raw ore to-2 mm, and performing primary coarse grinding, wherein the coarse grinding concentration is 45-55%, and the grinding fineness is-0.074 mm, and the content of the grinding ore is 40-45%; adding kerosene and pine oil into the rough-ground raw ore, fully stirring, and then performing rough concentration operation, wherein the rough concentration is 20-25%, and the rough concentration time is 3-5 min, so as to obtain rough concentrate and tailings 1; the dosage of the kerosene is 350-450 g/t, and the dosage of the pine oil is 30-50 g/t;
s2, performing regrinding I operation on the rough concentrate obtained in the step S1, wherein the concentration of the regrinding I is 22-27%, and the content of the grinded ore is 60% -65% with the fineness of-0.074 mm; transferring the product obtained by the regrinding I into a flotation machine for a first step of concentration, wherein the flotation concentration is 12-16%, and the time of the concentration I is 3-4 min, so as to obtain concentrate I and middling 1;
s3, sending the concentrate I obtained in the step S2 into an ore mill for regrinding II, wherein the concentration of the ground ore is 16-20%, and the fineness of the ground ore is 62% -67%; after regrinding II, transferring the ground ore product into a flotation machine for a second step of concentration II, wherein the flotation concentration of the second step of concentration II is 10-15%, and the time of the second step of concentration II is 3-4 min, so that concentrate II and middling 2 are obtained;
s4, pre-grading the concentrate II obtained in the step S3, and directly using the concentrate II as the final concentrate of the large-scale graphite without performing subsequent grading operation on the concentrate with the diameter of +0.15 mm; putting the part of the powder with the particle size of-0.15 mm into an ultrasonic reaction kettle for ultrasonic treatment, wherein the treatment concentration is 15-20%, the ultrasonic time is 15-20 min, and the content of the powder with the particle size of-0.074 mm is 80-85%;
the ore pulp obtained after the ultrasonic treatment enters a flotation machine to carry out concentration III operation, the concentration of concentration III flotation is 10-13%, the flotation time of concentration III flotation is 3-4 min, and concentration III concentrate and middling 3 are obtained;
putting the concentrate III in a flotation machine for concentration IV operation, wherein the concentration of the concentrate IV is 9-12%, and the time of the concentrate IV flotation is 3-4 min, so as to obtain final graphite product concentrate and middling 4;
s5, combining the obtained middlings 1 and 2, adding kerosene and terpineol oil for scavenging, wherein the scavenging concentration is 11% -13%, the scavenging time is 2-3 min, and obtaining middlings 5 and tailings 2, wherein the dosage of the kerosene is 80-120 g/t, and the dosage of the terpineol oil is 10-30 g/t;
and S6, returning the obtained middling 5 to the roughing operation of the step S1, combining the middling 3 and the middling 4, returning to the concentration II operation of the step 3, and sequentially carrying out the subsequent operation processes to obtain the final graphite product concentrate.
2. The short-process beneficiation method for low-grade fine flake graphite according to claim 1, wherein the fixed carbon content of the raw graphite ore is 6-12%.
3. The short-process beneficiation method for low-grade fine flake graphite according to claim 1, wherein the rough grinding and regrinding operation employs a conical ball mill.
4. The short-process beneficiation method for low-grade fine flake graphite according to claim 1, wherein an XRF single-groove flotation machine is adopted in the roughing, concentrating and scavenging processes.
5. The short-process beneficiation method for low-grade fine flake graphite according to claim 1, wherein the ultrasonic treatment is performed by using an ultrasonic reaction kettle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083493A (en) * | 2021-04-12 | 2021-07-09 | 昆明理工大学 | Microwave roasting pretreatment graphite ore enhanced flotation purification method |
| CN114405683A (en) * | 2022-01-14 | 2022-04-29 | 五星新材科技有限公司 | Graphite flotation treatment process and device |
| CN114853005A (en) * | 2022-06-20 | 2022-08-05 | 苏州中材非金属矿工业设计研究院有限公司 | Short-flow graphite purification method adopting machine-column combined separation |
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| CN102773152A (en) * | 2012-07-13 | 2012-11-14 | 四川领航石墨制品有限公司 | Fine flaky-cryptocrystalline mixed graphite separation technique |
| CN107739029A (en) * | 2017-10-31 | 2018-02-27 | 中国地质科学院郑州矿产综合利用研究所 | Crystalline graphite flake protection and quality separation method |
| AU2017203560A1 (en) * | 2017-05-26 | 2018-12-13 | Syrah Resources Limited | Natural graphite concentration device utilizing ultrasonic aided flotation |
| CN109647630A (en) * | 2018-12-28 | 2019-04-19 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of short route method of purification of graphite |
| CN109909062A (en) * | 2019-03-27 | 2019-06-21 | 青海省地质矿产测试应用中心 | Mineral separation method of protective scale for fine-grained crystalline graphite ore |
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Patent Citations (5)
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| CN102773152A (en) * | 2012-07-13 | 2012-11-14 | 四川领航石墨制品有限公司 | Fine flaky-cryptocrystalline mixed graphite separation technique |
| AU2017203560A1 (en) * | 2017-05-26 | 2018-12-13 | Syrah Resources Limited | Natural graphite concentration device utilizing ultrasonic aided flotation |
| CN107739029A (en) * | 2017-10-31 | 2018-02-27 | 中国地质科学院郑州矿产综合利用研究所 | Crystalline graphite flake protection and quality separation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083493A (en) * | 2021-04-12 | 2021-07-09 | 昆明理工大学 | Microwave roasting pretreatment graphite ore enhanced flotation purification method |
| CN114405683A (en) * | 2022-01-14 | 2022-04-29 | 五星新材科技有限公司 | Graphite flotation treatment process and device |
| CN114405683B (en) * | 2022-01-14 | 2024-03-22 | 五星新材科技有限公司 | Graphite flotation treatment process and device |
| CN114853005A (en) * | 2022-06-20 | 2022-08-05 | 苏州中材非金属矿工业设计研究院有限公司 | Short-flow graphite purification method adopting machine-column combined separation |
| CN114853005B (en) * | 2022-06-20 | 2024-03-29 | 苏州中材非金属矿工业设计研究院有限公司 | Short-process purification method for graphite by combined separation of machine and column |
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Application publication date: 20210112 |