阅读说明：本技术 一种球形石墨原料生产工艺 (Production process of spherical graphite raw material ) 是由 赵亮 陈新江 于 2020-07-09 设计创作，主要内容包括：本发明公开了一种球形石墨原料生产工艺,包括如下步骤：S100、原料粉碎；S200、一级分选；S300、一级剥片研磨；S400、二级分选；S500、二级剥片研磨；S600、三级分选；S700、压滤；S800、烘干；S900、粉体分级；S1000、包装,根据本发明的球形石墨原料生产工艺,制备的石墨成品中粒度-325目所占的质量百分比得以大幅度降低,产品中-325目含量由现有技术中的高于50％降低到35％以下。(The invention discloses a production process of a spherical graphite raw material, which comprises the following steps: s100, crushing raw materials; s200, primary sorting; s300, first-stage stripping and grinding; s400, secondary sorting; s500, secondary stripping and grinding; s600, three-stage sorting; s700, filter pressing; s800, drying; s900, grading the powder; s1000, packaging, and according to the production process of the spherical graphite raw material, the mass percentage of the particle size of-325 meshes in the prepared graphite finished product is greatly reduced, and the content of-325 meshes in the product is reduced to below 35% from higher than 50% in the prior art.)

1. The production process of the spherical graphite raw material is characterized by comprising the following steps:

s100, crushing raw materials: the graphite raw material is crushed by a mill (100), and the process parameters are as follows: the rotating speed is 48-50 r/min, the time is 11-16 minutes, the frequency is 1 time, the ore grinding mass percentage concentration is 55-70%, the discharging granularity is-200 meshes, the mass percentage is 45-55%, and the discharging mass percentage concentration is 14-28%;

s200, primary sorting: primary sorting is carried out in a primary sorting machine (200), and the technological parameters are as follows: the rotating speed is 220 plus one year at 270 rpm, the time is 18-24 minutes, the times are 2-4 times, the grade is 70-78%, and the granularity is-325 meshes, which accounts for 18-23% of the mass percentage;

s300, primary stripping and grinding: carrying out primary grinding in a primary stripping grinder (300), wherein the process parameters are as follows: the rotating speed is 210 plus 260 r/min, the time is 25-35 min, the times are 4-6, and the granularity is-325 meshes, which accounts for 28-33 percent of the mass percent;

s400, secondary sorting: secondary sorting is carried out in a secondary sorting machine (400), and the technological parameters are as follows: the rotating speed is 210 plus 240 r/min, the time is 20-25 minutes, the times are 3-5 times, the grade is 92-93%, and the granularity is-325 meshes, and accounts for 27-32% of the mass percentage;

s500, secondary stripping and grinding: carrying out secondary grinding in a secondary stripping grinder (500), wherein the process parameters are as follows: the rotating speed is 200 plus 240 r/min, the time is 20-30 min, the times are 3-5 times, and the granularity is-325 meshes, accounting for 37-42 percent of the mass percentage;

s600, three-stage sorting: three-stage separation is carried out in a three-stage separator (600), and the technological parameters are as follows: the rotating speed is 200-;

s700, filter pressing: filtering by using a membrane filter press (700), wherein the process parameters are as follows: the mass percentage concentration of the feeding concentration is 25-30%, the feeding pressure is 8 atmospheric pressures, the feeding time is 8-11 minutes, and the mass percentage of the water in the filter cake is 21-26%;

s800, drying: drying in a tubular dryer (800) at the temperature of 700 ℃ and 900 ℃ for 15-20 minutes;

s900, powder grading: the powder is classified by a powder classifier (900), and the powder classification conditions are as follows: the rotor rotation speed is 750 plus 2900 r/min, the grade is 95.3-95.8 percent, and the granularity is-325 meshes accounting for 30-35 percent of the mass percentage;

s1000, packaging: packaging is performed by an automatic packaging machine (1000).

2. The process for producing the raw material of spheroidal graphite according to claim 1, wherein the step S900 further includes S910 dust removal, and the dust removal is performed by a dust remover (910), and the process parameters are as follows: the pore size of the dust removing cloth bag is less than 20 μm, the blowing pressure is 6-8 atmospheric pressures, products of minus 325 meshes are completely recovered, and the concentration of tail gas is less than 10mg/m³。

3. The raw material production process of spheroidal graphite according to claim 2, wherein a fan (920) is connected to the dust collector (910).

4. The process for producing a raw material for spheroidal graphite according to claim 1, wherein in step S100, the process parameters are: the rotating speed is 49 revolutions per minute, the time is 13 minutes, the times are 1 time, the ore grinding mass percentage concentration is 60 percent, the discharged material granularity is-200 meshes, the mass percentage concentration is 50 percent, and the discharged material mass percentage concentration is 20 percent.

5. The process for producing a raw material for spheroidal graphite according to claim 1, wherein in step S200, the process parameters are: the rotating speed is 250 r/min, the time is 21 minutes, the times are 3 times, the grade is 75 percent, and the granularity of-325 meshes accounts for 20 percent of the mass percentage;

in step S400, the process parameters are: the rotating speed is 230 r/min, the time is 23 min, the times are 4, the grade is 93 percent, and the granularity of 325 meshes accounts for 30 percent by mass.

6. The process for producing a raw material for spheroidal graphite according to claim 1, wherein in step S300, the process parameters are: the rotating speed is 230 r/min, the time is 28 minutes, the times are 5 times, and the granularity of-325 meshes accounts for 30 percent by mass;

in step S500, the process parameters are: the rotating speed is 220 r/min, the time is 25 minutes, the times are 4 times, and the granularity of 325 meshes accounts for 39 percent by mass.

7. The process for producing a raw material for spheroidal graphite according to claim 1, wherein in step S600, the process parameters are: the rotating speed is 210 r/min, the time is 15 minutes, the times are 3 times, the grade is 95.3 percent, and the granularity is-325 meshes, and accounts for 38 percent by mass.

8. The process for producing a raw material for spheroidal graphite according to claim 1, wherein in step S700, the process parameters are: the mass percent concentration of the feeding concentration is 28 percent, the feeding pressure is 8 atmospheric pressures, the feeding time is 9 minutes, and the mass percent of the water in the filter cake is 24 percent.

9. The process for producing a raw material of spheroidal graphite according to claim 1, wherein in step S800, the drying temperature is 800 degrees celsius, and the drying time is 17 minutes;

in step S900, the powder classification conditions are: the rotor speed is 1200 r/min, the grade is 95.6%, and the particle size is-325 meshes and accounts for 34% by mass.

10. The process for producing spheroidal graphite feedstock according to claim 1, wherein the mill (100) is a roller mill;

the primary separator (200), the secondary separator (400) and the tertiary separator (600) are flotation machines.

Technical Field

The invention relates to the technical field of graphite processing, in particular to a production process of a spherical graphite raw material.

Background

Graphite is crystalline carbon and a hexagonal system, is iron black to dark gray, is soft, has greasy feeling and can conduct electricity, and the graphite has inactive chemical properties, resists corrosion and is not easy to react with acid, alkali and the like, so that the graphite product is widely applied in a plurality of industries such as metallurgy, chemical engineering, machinery, medical appliances, nuclear energy, automobiles, aerospace and the like, the demand of the industries on the graphite and carbon products is continuously increased, and the quality requirement is higher and higher.

The spherical graphite is prepared by taking high-quality high-carbon natural crystalline flake graphite and the like as raw materials, the graphite surface is generally modified by adopting an advanced processing technology, and graphite products with different fineness and similar to elliptical sphere shapes are produced.

However, in the prior art, the existing production process of the raw material of spherical graphite has the technical defects of complex process, low automation degree, long production period, low recovery rate and the like, and is difficult to meet the urgent demand of increasing demand.

Therefore, the technical means of the production process of the raw material of spherical graphite needs to be further improved.

Disclosure of Invention

In order to solve the technical problems in the prior art, such as the above, the invention discloses a production process of a spherical graphite raw material, which comprises the following steps:

s100, crushing raw materials: the graphite raw material is crushed by a mill (100), and the process parameters are as follows: the rotating speed is 48-50 r/min, the time is 11-16 minutes, the frequency is 1 time, the ore grinding mass percentage concentration is 55-70%, the discharging granularity is-200 meshes, the mass percentage is 45-55%, and the discharging mass percentage concentration is 14-28%;

s200, primary sorting: primary sorting is carried out in a primary sorting machine (200), and the technological parameters are as follows: the rotating speed is 220 plus one year at 270 rpm, the time is 18-24 minutes, the times are 2-4 times, the grade is 70-78%, and the granularity is-325 meshes, which accounts for 18-23% of the mass percentage;

s300, primary stripping and grinding: carrying out primary grinding in a primary stripping grinder (300), wherein the process parameters are as follows: the rotating speed is 210 plus 260 r/min, the time is 25-35 min, the times are 4-6, and the granularity is-325 meshes, which accounts for 28-33 percent of the mass percent;

s400, secondary sorting: secondary sorting is carried out in a secondary sorting machine (400), and the technological parameters are as follows: the rotating speed is 210 plus 240 r/min, the time is 20-25 minutes, the times are 3-5 times, the grade is 92-93%, and the granularity is-325 meshes, and accounts for 27-32% of the mass percentage;

s500, secondary stripping and grinding: carrying out secondary grinding in a secondary stripping grinder (500), wherein the process parameters are as follows: the rotating speed is 200 plus 240 r/min, the time is 20-30 min, the times are 3-5 times, and the granularity is-325 meshes, accounting for 37-42 percent of the mass percentage;

s600, three-stage sorting: three-stage separation is carried out in a three-stage separator (600), and the technological parameters are as follows: the rotating speed is 200-;

s700, filter pressing: filtering by using a membrane filter press (700), wherein the process parameters are as follows: the mass percentage concentration of the feeding concentration is 25-30%, the feeding pressure is 8 atmospheric pressures, the feeding time is 8-11 minutes, and the mass percentage of the water in the filter cake is 21-26%;

s800, drying: drying in a tubular dryer (800) at the temperature of 700 ℃ and 900 ℃ for 15-20 minutes;

s900, powder grading: the powder is classified by a powder classifier (900), and the powder classification conditions are as follows: the rotor rotation speed is 750 plus 2900 r/min, the grade is 95.3-95.8 percent, and the granularity is-325 meshes accounting for 30-35 percent of the mass percentage;

s1000, packaging: packaging is performed by an automatic packaging machine (1000).

According to the embodiment of the present invention, further, step S900 further includes S910, performing dust removal processing by using a dust remover (910), where the process parameters are: the pore size of the dust removing cloth bag is less than 20 μm, the blowing pressure is 6-8 atmospheric pressures, products of minus 325 meshes are completely recovered, and the concentration of tail gas is less than 10mg/m³。

According to the embodiment of the invention, further, a fan (920) is connected to the dust remover (910).

According to the embodiment of the present invention, preferably, in step S100, the process parameters are: the rotating speed is 49 revolutions per minute, the time is 13 minutes, the times are 1 time, the ore grinding mass percentage concentration is 60 percent, the discharged material granularity is-200 meshes, the mass percentage concentration is 50 percent, and the discharged material mass percentage concentration is 20 percent.

According to the embodiment of the present invention, preferably, in step S200, the process parameters are: the rotating speed is 250 r/min, the time is 21 min, the times are 3 times, the grade is 75 percent, and the granularity of-325 meshes accounts for 20 percent of the mass percentage;

in step S400, the process parameters are: the rotating speed is 230 r/min, the time is 23 min, the times are 4, the grade is 93%, and the granularity of-325 meshes accounts for 30% of the mass percentage.

According to the embodiment of the present invention, preferably, in step S300, the process parameters are: the rotating speed is 230 r/min, the time is 28 minutes, the times are 5 times, and the granularity of-325 meshes accounts for 30 percent by mass;

in step S500, the process parameters are: the rotating speed is 220 r/min, the time is 25 minutes, the times are 4 times, and the granularity of 325 meshes accounts for 39 percent by mass.

According to the embodiment of the present invention, preferably, in step S600, the process parameters are: the rotating speed is 210 r/min, the time is 15 minutes, the times are 3 times, the grade is 95.3 percent, and the granularity is-325 meshes, and accounts for 38 percent by mass.

According to the embodiment of the present invention, preferably, in step S700, the process parameters are: the mass percent concentration of the feeding concentration is 28 percent, the feeding pressure is 8 atmospheric pressures, the feeding time is 9 minutes, and the mass percent of the water in the filter cake is 24 percent.

According to the embodiment of the present invention, preferably, in step S800, the drying temperature is 800 degrees celsius, and the drying time is 17 minutes;

in step S900, the powder classification conditions are: the rotor speed is 1200 r/min, the grade is 95.6%, and the particle size is-325 meshes and accounts for 34% by mass.

According to an embodiment of the invention, optionally, the mill (100) is a roller mill; the primary separator (200), the secondary separator (400) and the tertiary separator (600) are flotation machines.

Compared with the prior art, the production process of the spherical graphite raw material has the beneficial technical effects that at least:

1. according to the production process of the spherical graphite raw material, the mass percentage of the particle size of-325 meshes in the prepared graphite finished product is greatly reduced, and the content of-325 meshes in the product is reduced to below 35 percent from higher than 50 percent in the prior art.

2. According to the production process of the spherical graphite raw material, the 325-mesh product is completely recovered through dust removal treatment, and the tail gas concentration is less than 10mg/m³Thereby not only creating huge economic value, but also being beneficial to environmental protectionProtect human health.

3. According to the production process of the spherical graphite raw material, the key process equipment such as the high-efficiency roller mill, the large-scale stripping grinder, the high-efficiency flotation machine, the powder classifier and the like is adopted, so that the whole preparation process realizes automation, streamlined and large-scale operation, the process flow is simpler, a large amount of manpower and material resources are saved, the preparation efficiency is greatly improved, and the preparation period is obviously shortened.

The technical features and advantageous effects of the present invention will be further explained in the following sections.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow diagram of the process for producing a raw material for spheroidal graphite according to the present invention.

FIG. 2 is a schematic structural view of an embodiment system of the process for producing a raw material for spheroidal graphite according to the present invention.

Detailed Description

The invention is described in further detail below with reference to specific embodiments and with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In addition, the examples are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium; mechanical connection, circuit connection, and the like are possible. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it is noted that, unless explicitly stated or limited otherwise, the terms "primary, secondary, tertiary" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "primary, secondary, tertiary" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present specification, 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. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

The present invention is further described below by way of specific examples in conjunction with the accompanying drawings, which are intended to be illustrative only and should not be construed as limiting the invention in any way. In addition, in the following examples, if not specifically mentioned, all the equipment and materials used are commercially available.

The process steps of the invention

The invention discloses a production process of a spherical graphite raw material, which comprises the following steps of:

s100, crushing raw materials

In this step, a graphite raw material, which may be natural graphite flakes or the like, is pulverized by a mill (100).

In this step, the optional process parameters are: the rotating speed is 48-50 r/min, the time is 11-16 minutes, the frequency is 1 time, the ore grinding mass percentage concentration is 55-70%, the discharging granularity is-200 meshes, the mass percentage is 45-55%, and the discharging mass percentage concentration is 14-28%.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 49 revolutions per minute, the time is 13 minutes, the times are 1 time, the ore grinding mass percentage concentration is 60 percent, the discharged material granularity is-200 meshes, the mass percentage concentration is 50 percent, and the discharged material mass percentage concentration is 20 percent.

S200, primary sorting

In this step, primary sorting is performed by a primary sorter (200).

In this step, the optional process parameters are: the rotating speed is 220-270 rpm, the time is 18-24 minutes, the times are 2-4 times, the grade is 70-78%, and the granularity is-325 meshes and accounts for 18-23% of the mass percentage.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 250 r/min, the time is 21 min, the times are 3, the grade is 75 percent, and the granularity of-325 meshes accounts for 20 percent of the mass percentage.

S300, primary stripping and grinding

In this step, primary grinding is performed in a primary stripping grinder (300).

In this step, the optional process parameters are: the rotating speed is 210 plus 260 revolutions per minute, the time is 25 to 35 minutes, the times are 4 to 6 times, and the granularity is-325 meshes, which accounts for 28 to 33 percent of the mass percentage.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 230 r/min, the time is 28 minutes, the times are 5 times, and the granularity of 325 meshes accounts for 30 percent by mass

S400, secondary sorting

In this step, secondary sorting is performed in a secondary sorter (400).

In this step, the optional process parameters are: the rotating speed is 210 plus 240 r/m, the time is 20-25 minutes, the times are 3-5 times, the grade is 92-93%, and the granularity is-325 meshes, and the mass percentage is 27-32%.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 230 r/min, the time is 23 min, the times are 4, the grade is 93%, and the granularity of-325 meshes accounts for 30% of the mass percentage.

S500, two-stage stripping and grinding

In this step, secondary grinding is performed in a secondary stripping grinder (500).

In this step, the optional process parameters are: the rotation speed is 200 plus 240 r/m, the time is 20-30 minutes, the times are 3-5 times, and the granularity is-325 meshes, which accounts for 37-42 percent of the mass.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 220 r/min, the time is 25 minutes, the times are 4 times, and the granularity of 325 meshes accounts for 39 percent by mass.

S600, three-stage sorting

In this step, three-stage sorting is performed in a three-stage sorter (600).

In this step, the optional process parameters are: the rotation speed is 200-.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the rotating speed is 210 r/min, the time is 15 minutes, the times are 3 times, the grade is 95.3 percent, and the granularity is-325 meshes, and accounts for 38 percent by mass.

S700, filter pressing

In this step, filtration is performed using a membrane filter press (700).

In this step, the optional process parameters are: the mass percentage concentration of the feeding concentration is 25-30%, the feeding pressure is 8 atmospheric pressures, the feeding time is 8-11 minutes, and the mass percentage of the water in the filter cake is 21-26%.

According to the embodiment of the present invention, preferably, the process parameters in this step are: the mass percent concentration of the feeding concentration is 28 percent, the feeding pressure is 8 atmospheric pressures, the feeding time is 9 minutes, and the mass percent of the water in the filter cake is 24 percent.

S800, drying

In the step, drying treatment is carried out in a tubular dryer (800), wherein the drying temperature is 700 ℃ and 900 ℃, and the drying time is 15-20 minutes.

According to the embodiment of the invention, the drying temperature is preferably 800 ℃, and the drying time is preferably 17 minutes.

S900, powder classification

In this step, classification is performed by a powder classifier (900).

In this step, the powder classification conditions are: the rotor rotation speed is 750 plus 2900 r/min, the grade is 95.3-95.8%, and the mass percentage of the granularity-325 meshes is 30-35%.

According to the embodiment of the present invention, preferably, the powder classifying conditions are: the rotor speed is 1200 r/min, the grade is 95.6%, and the particle size is-325 meshes and accounts for 34% by mass.

According to the embodiment of the present invention, further, step S900 further includes S910, performing dust removal processing by using a dust remover (910), where the selectable process parameters are: the pore size of the dust removing cloth bag is less than 20 μm, the blowing pressure is 6-8 atmospheric pressures, products of minus 325 meshes are completely recovered, and the concentration of tail gas is less than 10mg/m³。

According to the embodiment of the present invention, it is preferable that a fan (920) is connected to the dust collector (910).

S1000, packaging

In this step, packaging is performed by an automatic packaging machine (1000).

The invention is described in further detail below with reference to specific embodiments and with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The examples are illustrative and are not to be construed as limiting the invention. 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.

In addition, in the following examples, if not specifically mentioned, all the equipment and materials used are commercially available.