Crystalline graphite large-scale protection short-process sorting method

Abstract

The invention discloses a crystalline graphite large-scale protection short-process separation method which comprises the following steps: A, firstly, adding raw ore into a crusher for crushing, and then carrying out multiple times of grinding to obtain coarse-grade graphite ore; b, the coarse-grade graphite ore is added into a flotation machine, a flotation agent is injected to be fully stirred and mixed with the graphite ore, primary flotation is conducted, and primary flotation ore is obtained; c, the primary flotation ore is dried and then added into a ball mill to be subjected to multiple times of ball milling, multiple times of sieving is conducted, and primary concentrated ore is obtained; d, the primary concentrated ore is added into a flotation machine, a flotation agent is injected again to be fully stirred and mixed with the primary concentrated ore, secondary flotation is conducted, and secondary flotation ore is obtained; e, the secondary flotation ore and an emulsifier are mixed, stirred and emulsified, scavenging is conducted, ball milling and sieving are conducted again, and the high-carbon graphite concentrate is obtained.The separation method has the effects of being short in process and high in efficiency, graphite flakes can be effectively protected, the high-carbon large-flake crystalline graphite concentrate is obtained, and the yield of large crystalline graphite flakes is increased.

Description

Technical Field

[0001] The invention relates to the technical field of graphite sorting, in particular to a short-process sorting method for protecting large crystalline graphite flakes. Background Art

[0002] my country is rich in graphite resources, and its reserves and output rank first in the world. Graphite ore can be divided into crystalline graphite and cryptocrystalline graphite according to its crystal form, and crystalline graphite can be divided into dense crystalline graphite and flake graphite. Dense crystalline graphite ore is less in nature, and is not much developed and utilized. Moreover, it has high grade and can generally be used directly after hand selection. Flake graphite is a crystalline graphite that has been studied more in mineral processing. Flake graphite usually has good crystallization and natural floatability, so traditional flotation process can obtain higher grade and recovery rate. However, since the size of flake graphite flakes is closely related to its performance, the larger the flakes, the better the quality of graphite. Therefore, in order to improve the economic benefits of flake graphite ore and better develop and utilize my country's graphite resources, it is necessary to protect the graphite flakes during the graphite beneficiation process and ensure the grade and recovery rate.

[0003] At present, the commonly used beneficiation processes for crystalline graphite are: quality-based flotation, rapid flotation, and graded grinding and flotation. The process characteristics of flotation protection of large flakes are: stage grinding, stage flotation, multiple concentrations, use of mills with low grinding intensity, and separation of high-grade large flake graphite as soon as possible. Although graphite concentrate with a fixed carbon content of more than 95% can be obtained through multiple grinding and multiple flotation, high-hardness gangue mineral particles such as quartz will inevitably split and break the large flakes of crystalline graphite during multiple grinding, resulting in serious loss of large flakes. Therefore, it is necessary to develop a short-process separation method for protecting large flakes of crystalline graphite. Summary of the invention

[0004] The purpose of the present invention is to provide a short-process separation method for crystalline graphite large flakes to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a crystalline graphite large flake protection short process sorting method, comprising the following steps:

[0006] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0007] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0008] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0009] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0010] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0011] Preferably, in step A, the grinding rate of the grinder is 80-140 rpm, the grinding time is 30 min-40 min, and the grinding times are 2-3 times.

[0012] Preferably, the flotation agent components in step B include 30-40 parts by weight of O-isopropyl-N-ethylthiocarbamate, 10-20 parts of methyl isobutyl carbinol, 15-25 parts of sorbitan monooleate, and 10-20 parts of pine oil.

[0013] Preferably, in step C, the ball milling rate is 200-500 rpm, the ball milling time is 60 min-80 min, and the ball milling times are 3-4 times.

[0014] Preferably, the mesh size of the sieve used for screening in step C is controlled to be 2mm-4mm.

[0015] Preferably, the flotation agent components in step D include 30-40 parts of methyl isobutyl carbinol, 10-20 parts of petroleum ether, 5-9 parts of activator, and 2-6 parts of foaming agent in parts by weight.

[0016] Preferably, the emulsifier model in step E is emulsifier OP-10.

[0017] Preferably, the ball milling time in step E is 40 min-60 min, and the sieve hole size is controlled to be 1 mm-3 mm.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the separation method adopted by the present invention has the effects of short process and high efficiency, can effectively protect graphite flakes, obtain high-carbon large-flake crystalline graphite concentrate, and improve the yield of crystalline graphite large flakes; the present invention adopts two flotation agents, which can improve the flotation efficiency and graphite recovery rate, and can reduce the consumption of flotation agents. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1:

[0021] The present invention provides the following technical solution: a crystalline graphite large flake protection short-process separation method, comprising the following steps:

[0022] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0023] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0024] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0025] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0026] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0027] In this embodiment, the grinding speed of the grinder in step A is 80 rpm, the grinding time is 30 min, and the grinding times are 2 times.

[0028] In this embodiment, the flotation agent components in step B include 30 parts by weight of O-isopropyl-N-ethylthiocarbamate, 10 parts by weight of methyl isobutyl carbinol, 15 parts by weight of sorbitan monooleate, and 10 parts by weight of pine oil.

[0029] In this embodiment, in step C, the ball milling speed is 200 rpm, the ball milling time is 60 min, and the ball milling times are 3 times.

[0030] In this embodiment, the mesh size of the sieve used in step C is controlled to be 2 mm.

[0031] In this embodiment, the flotation agent components in step D include 30 parts of methyl isobutyl carbinol, 10 parts of petroleum ether, 5 parts of activator, and 2 parts of frother by weight.

[0032] In this embodiment, the emulsifier model in step E is emulsifier OP-10.

[0033] In this embodiment, the ball milling time in step E is 40 minutes, and the sieve hole size is controlled to be 1 mm.

[0034] Embodiment 2:

[0035] A crystalline graphite large flake protection short-process sorting method comprises the following steps:

[0036] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0037] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0038] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0039] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0040] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0041] In this embodiment, the grinding speed of the grinder in step A is 140 rpm, the grinding time is 40 min, and the grinding times are 3 times.

[0042] In this embodiment, the flotation agent components in step B include 40 parts by weight of O-isopropyl-N-ethylthiocarbamate, 20 parts by weight of methyl isobutyl carbinol, 25 parts by weight of sorbitan monooleate, and 20 parts by weight of pine oil.

[0043] In this embodiment, in step C, the ball milling speed is 500 rpm, the ball milling time is 80 min, and the ball milling times are 4 times.

[0044] In this embodiment, the mesh size of the sieve used in step C is controlled to be 4 mm.

[0045] In this embodiment, the flotation agent components in step D include 40 parts of methyl isobutyl carbinol, 20 parts of petroleum ether, 9 parts of activator, and 6 parts of frother by weight.

[0046] In this embodiment, the emulsifier model in step E is emulsifier OP-10.

[0047] In this embodiment, the ball milling time in step E is 60 minutes, and the sieve hole size is controlled to be 3 mm.

[0048] Embodiment three:

[0049] A crystalline graphite large flake protection short-process sorting method comprises the following steps:

[0050] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0051] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0052] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0053] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0054] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0055] In this embodiment, the grinding speed of the grinder in step A is 90 rpm, the grinding time is 33 min, and the grinding times are 2 times.

[0056] In this embodiment, the flotation agent components in step B include 32 parts by weight of O-isopropyl-N-ethylthiocarbamate, 12 parts by weight of methyl isobutyl carbinol, 18 parts by weight of sorbitan monooleate, and 12 parts by weight of pine oil.

[0057] In this embodiment, in step C, the ball milling speed is 240 rpm, the ball milling time is 65 min, and the ball milling times are 3 times.

[0058] In this embodiment, the mesh size of the sieve used in step C is controlled to be 2 mm.

[0059] In this embodiment, the flotation agent components in step D include 33 parts of methyl isobutyl carbinol, 13 parts of petroleum ether, 6 parts of activator, and 3 parts of frother by weight.

[0060] In this embodiment, the emulsifier model in step E is emulsifier OP-10.

[0061] In this embodiment, the ball milling time in step E is 45 minutes, and the sieve hole size is controlled to be 1 mm.

[0062] Embodiment 4:

[0063] A crystalline graphite large flake protection short-process sorting method comprises the following steps:

[0064] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0065] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0066] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0067] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0068] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0069] In this embodiment, the grinding speed of the grinder in step A is 130 rpm, the grinding time is 38 min, and the grinding times are 3 times.

[0070] In this embodiment, the flotation agent components in step B include 38 parts of O-isopropyl-N-ethylthiocarbamate, 18 parts of methyl isobutyl carbinol, 22 parts of sorbitan monooleate, and 18 parts of pine oil in parts by weight.

[0071] In this embodiment, in step C, the ball milling speed is 450 rpm, the ball milling time is 75 min, and the ball milling times are 4 times.

[0072] In this embodiment, the mesh size of the sieve used in step C is controlled to be 4 mm.

[0073] In this embodiment, the flotation agent components in step D include 38 parts of methyl isobutyl carbinol, 18 parts of petroleum ether, 8 parts of activator, and 5 parts of frother by weight.

[0074] In this embodiment, the emulsifier model in step E is emulsifier OP-10.

[0075] In this embodiment, the ball milling time in step E is 55 minutes, and the sieve hole size is controlled to be 3 mm.

[0076] Embodiment five:

[0077] A crystalline graphite large flake protection short-process sorting method comprises the following steps:

[0078] A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore;

[0079] B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore;

[0080] C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore;

[0081] D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore;

[0082] E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

[0083] In this embodiment, the grinding speed of the grinder in step A is 110 rpm, the grinding time is 35 min, and the grinding times are 3 times.

[0084] In this embodiment, the flotation agent components in step B include 35 parts of O-isopropyl-N-ethylthiocarbamate, 15 parts of methyl isobutyl carbinol, 20 parts of sorbitan monooleate, and 15 parts of pine oil in parts by weight.

[0085] In this embodiment, in step C, the ball milling speed is 350 rpm, the ball milling time is 70 min, and the ball milling times are 4 times.

[0086] In this embodiment, the mesh size of the sieve used in step C is controlled to be 3 mm.

[0087] In this embodiment, the flotation agent components in step D include 35 parts of methyl isobutyl carbinol, 15 parts of petroleum ether, 7 parts of activator, and 4 parts of frother by weight.

[0088] In this embodiment, the emulsifier model in step E is emulsifier OP-10.

[0089] In this embodiment, the ball milling time in step E is 50 minutes, and the sieve hole size is controlled to be 2 mm.

[0090] Experimental example:

[0091] Graphite was sorted by the sorting methods of the embodiments of the present invention, and the quality and recovery rate of graphite concentrate were tested, and the data obtained were as follows:

[0092] taste(%) Recovery rate (%) Embodiment 1 99.5 89.8 Embodiment 2 99.6 89.3 Embodiment 3 99.7 90.2 Embodiment 4 99.5 90.5 Embodiment 5 99.8 90.8

[0093] In summary, the sorting method adopted in the present invention has the effects of short process and high efficiency, can effectively protect graphite flakes, obtain high-carbon large-flake crystalline graphite concentrate, and improve the yield of crystalline graphite large flakes; the present invention adopts two flotation agents, which can improve the flotation efficiency and graphite recovery rate, and can reduce the consumption of flotation agents.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crystalline graphite large flake protection short process sorting method, characterized by: The following steps are involved: A. First, add the raw ore into the crusher for crushing, and then go through multiple grinding to obtain coarse graphite ore; B. Add the coarse graphite ore into the flotation machine, inject the flotation agent and stir and mix the graphite ore thoroughly, perform a flotation, and obtain a flotation ore; C. After drying the primary flotation ore, add it into a ball mill for multiple ball milling and multiple screening to obtain a primary concentrated ore; D. Add the primary concentrated ore into the flotation machine, inject the flotation agent again and stir and mix it with the primary concentrated ore, perform secondary flotation, and obtain secondary flotation ore; E. Mix the secondary flotation ore with the emulsifier, stir and emulsify it, then scavenging and ball milling and sieving it again to obtain high carbon graphite concentrate.

2. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: In the step A, the grinding speed of the grinder is 80-140 rpm, the grinding time is 30 min-40 min, and the grinding times are 2-3 times.

3. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: The flotation agent components in step B include 30-40 parts of O-isopropyl-N-ethylthiocarbamate, 10-20 parts of methyl isobutyl carbinol, 15-25 parts of sorbitan monooleate, and 10-20 parts of pine oil by weight.

4. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: In the step C, the ball milling rate is 200-500 rpm, the ball milling time is 60 min-80 min, and the ball milling times are 3-4 times.

5. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: The mesh size of the sieve used in the sieving in step C is controlled to be 2mm-4mm.

6. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: The flotation agent components in step D include 30-40 parts of methyl isobutyl carbinol, 10-20 parts of petroleum ether, 5-9 parts of activator, and 2-6 parts of foaming agent by weight.

7. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: The emulsifier model in step E is emulsifier OP-10.

8. A crystalline graphite large flake protection short-process separation method according to claim 1, characterized in that: In the step E, the ball milling time is 40 min-60 min, and the sieve hole size is controlled to be 1 mm-3 mm.