KR20130140503A - Method for refining sericite - Google Patents

Abstract

The present invention provides a plurality of biotite ore including quartz and biotite for the method of refining the biotite that can provide the high quality biotite of the desired value by using the grinding process of low quality biotite with simple process and high productivity. Crushing the stiffness ore with each other by using the relative hardness difference between the quartz and the stiffness, and collecting the crushed stiffness ore, and the content of the stiffness is higher than before the crushing and the content of the quartz It provides a method for purifying the mica, comprising the step of selecting the relatively low raw powder.

Description

Method for refining sill hair {Method for refining sericite}

The present invention relates to a method for purifying minerals, and more particularly, to a method for purifying mica.

In general, the sericite has a crystal formula of K _0.5-1 (Al, Fe, Mg) ₂ (SiAl) ₄ O ₁₀ (OH) ₂ · nH ₂ O. Crystallographically belongs to the monoclinic system (monoclinic system), has a plate-like or powdery form, refers to the clay-like fine muscovite produced by the hydrothermal reaction (hydrothermal reaction). The chemical composition is almost the same as that of the mica, but generally potassium (K) is less than that of the mica and a little more water (H ₂ O).

Cicada has various characteristics such as adsorption removal of heavy metals and gases, anion release, far-infrared radiation, and antibacterial effect, and it is used in various fields such as paint mixes, paper coatings, welding rod coatings, mechanical part abrasion inhibitors, building interior materials, agricultural materials, cosmetics have. The biotite used in these various fields is provided from the biotite, and the biotite contains a mixture of pure biotite and quartz. The use depends on the content and the whiteness of the components in the biotite ore. The main components of the biotite are silicon dioxide (SiO ₂ ) and aluminum oxide (Al ₂ O ₃ ) .In general, the lower the content of SiO _2, the higher the quality. Is treated as. The main component of quartz included in the biotite is silicon dioxide (SiO ₂ ), and by lowering the content of quartz, high quality biotite can be produced. In fact, the high quality biotite powders used in cosmetics are SiO ₂ ≤50wt%, Al ₂ O ₃ ≥30wt% and whiteness ≥85%, and the biotite used in welding rods is 43wt% ~ 52wt% SiO ₂ and 30wt Al ₂ O ₃ % ~ 40wt%.

However, the Cicada ore itself has a high content of quartz (SiO ₂ ) as well as other minerals such as magnetite and brown stone, which have a disadvantage of low quality. Therefore, various methods such as defensive method and floating screening method are used to purify the Cicada ore. Is using.

However, the defensive method belonging to the conventional biotite purification method requires excessive water, and the flotation method has little problem in removing quartz.

The present invention is to solve a number of problems including the above problems, by using a grinding process of low-quality biotite ore is simple and high productivity, the biotite tablets can provide a high-quality biotite of the desired value to the consumer It is an object to provide a method. However, these problems are exemplary and do not limit the scope of the present invention.

According to one aspect of the invention, the step of providing a plurality of biotite ore including quartz and biotite, the step of colliding the cauline ore with each other and pulverized and collecting the crushed biotite ore to the content of the biotite than before the grinding There is provided a method of purifying mica, which comprises the step of sorting the relatively high and relatively low content of quartz.

The step of crushing the mica hairs with each other may include colliding the mica hairs with each other by a jet mill.

The step of crushing the mica hairs by colliding with each other may include crushing the mica hairs by their own collision without using a separate external crushing medium.

The biotite ore may include at least one of the biotite ore and crushed biotite powder.

The chorionic raw light powder may have a particle size of 10 to 200 mesh.

After the step of sorting the raw powders, it may further comprise the step of further selecting the raw powders using a magnetic force and the acid treatment of the raw powders.

The acid treatment of the raw powders may include a step of treating with a hydroxyl or hydrochloric acid solution.

The grinding step and the sorting step may be performed at the same time.

The sorting step may be performed after the grinding step.

According to another aspect of the invention, the step of providing a first biotite and a second biotite, respectively comprising quartz and chorionic hair, the step of crushing and colliding the first biotite and the second biotite Collecting the first biotite and the second biotite ore, and the step of screening the raw wort powder having a relatively high content of the mica and relatively low quartz content than before the grinding is provided, .

The pulverizing may include crushing the mica in the second biotite ore by quartz or cicatridium in the first biotite ore, and crushing the mica in the first biotite ore by quartz or cirrus in the second biotite ore. It may include a step.

According to one embodiment of the present invention made as described above, by using the grinding process of low-grade mica is simple and high-productivity, it is possible to implement a method for refining mica that can provide a high-quality mica of the desired value. . In addition, not only purification but also pulverization can be performed at the same time, and high purity quartz remaining as a by-product can be obtained. Of course, the scope of the present invention is not limited by these effects.

1 is a flow chart schematically illustrating a method of purifying chorionic hair according to an embodiment of the present invention.
Figure 2 is a flow chart schematically illustrating a method of purifying chorionic hair according to another embodiment of the present invention.
3 is a flowchart specifically illustrating the grinding step of the biotite ore.
Figure 4 shows the X-ray diffraction analysis of the chorionic raw light powder used in the experimental example of the present invention.
Figure 5 is a schematic diagram schematically showing the appearance of a jet mill device for pulverizing the biotite used in one experimental example of the present invention.
6 is a plan view of the grinding chamber.
7 is a cross-sectional view of the grinding chamber.
8 is a graphical representation of the data in Table 3 using a bar graph.
9 shows the results of X-ray diffraction analysis of the powder collected in the primary collection container while changing the grinding pressure.
FIG. 10 shows the results of X-ray diffraction analysis of pulverized powder according to powder injection time at pulverization pressure 0.2MPa.
FIG. 11 shows the results of X-ray diffraction analysis of pulverized powder according to powder injection time at a pulverization pressure of 0.35 MPa.
12 shows the results of X-ray diffraction analysis of the powder collected in the primary collection container for each grinding time at a grinding pressure of 0.2MPa.
FIG. 13 shows the results of X-ray diffraction analysis of the powder collected in the primary collection container for each grinding time at a grinding pressure of 0.35 MPa.
FIG. 14 shows the results of X-ray diffraction analysis of powders removed by virtue of biotite powder pulverized through a jet mill process.
15 is an optical micrograph before acid treatment of biotite powder.
Fig. 16 is an optical microscope photograph after acid treatment of biotite raw powders.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Also, for convenience of explanation, the components may be exaggerated or reduced in size.

Quartz referred to in the present invention may be pure quartz, but may be a compound or a mixture containing quartz in a relatively high proportion. For example, potassium silicate and calcium silicate containing SiO ₂ , which is a main component of quartz, may be included. In addition, the biotite may be a pure biotite of the formula K _0.6 (Al _1.9 R _0.1 ) (Si _3.5 Al _0.5 ) O ₁₀ (OH) ₂ , wherein R may be an element having a divalent cation. It may be a compound or a mixture contained in a relatively high ratio.

1 is a flow chart schematically illustrating a method of purifying chorionic hair according to an embodiment of the present invention.

Referring to FIG. 1, as a method of refining the chorion, a step of providing a plurality of chorionic ore including quartz and villus (S110), colliding the chorionic ore with each other and grinding (S120), the pulverized raw powder Collecting the quartz and the mica included in the biotite ores (S130), selecting the selected raw ore powder using magnetic force (S140), and acid-treating impurities not removed by magnetic screening. It may include (S150).

In more detail, in operation S110, the biotite may be provided in which various minerals are included. For example, Sericite, Muscovite, Quartz, Quartz, Pyrite, Marcasite, Arsenopyrite, Hematite, Limonite, Magnetite, It may include chlorite, titanium iron (Ilmenite) and mica (Mica). In terms of the hardness of the minerals, the hardness of micas (variegal mica, dolomite, mica) is 2.0 to 4.0, and the iron minerals containing Fe are 5.0 to 6.5 and quartz is 7.0. Among the minerals included in these biotite ore, quartz has the highest hardness as 7.0, and the hardness of the biotite is low as 2.0 to 4.0. Therefore, the biotite may be purified using the difference in hardness and various physical properties of individual minerals included in the biotite.

The biotite ore may include the biotite ore, and may use a biotite powder in order to increase the grinding efficiency. In the case of the chorionic raw light powder may have a particle size of 10 to 200 mesh.

In order to purify the biotite, the above-mentioned biotite ore may be collided with each other by using the relative hardness difference between the quartz and the biotite (S120). In this case, the biotite can be crushed only by its own collision of the biotite without using an external grinding medium. When the Cicada ore collides with each other, crushing occurs, and the mineral is crushed by the hardness difference between the minerals included in the Cicada ore. Minerals collide with each other to crush minerals, such as when minerals of the same or similar hardness collide with each other, and minerals of lower hardness collide with minerals of higher hardness. The lower the hardness of the minerals, the more these cases occur than the higher hardness minerals, the more time is crushed during the same time, the relatively high hardness of the quartz is less grinding.

Therefore, when the stiffnesses collide with each other using the hardness difference between the quartz (hardness 7) and the stiffnesses (hardness 2-4) contained in the stiffnesses, more of the stiffness may be crushed during the same time. When only the biotite and quartz are viewed, the biotite may be crushed by the collision of the biotite and other biotite, and the case of the biotite and quartz may be crushed by the collision of the biotite and quartz. Since the grinding is selectively performed using the hardness difference between the minerals, it may be more suitable for the selective grinding method than the case of grinding the ore using a separate external grinding media.

For example, in the selective grinding method using an external grinding medium, a material of which the hardness of the external grinding medium is higher than that of the mica and quartz should be used. This is because the grinding media may be crushed or broken by quartz if the hardness of the grinding media is lower than quartz. However, when the hardness of the external grinding media is higher than quartz, not only the villi but also the quartz and the villus are all crushed, which may cause an inappropriate problem in efficiently selecting only the villi. However, according to an embodiment of the present invention, since the hardness of the quartz and the quartz with a different hardness, the quartz and the higher the hardness of the mica is collided, the mica is crushed. This method of using the hardness difference between the minerals can be said to be more suitable for the selective grinding method.

As chorionic ore is pulverized, it gradually becomes fine in the form of a powder, for example up to several micrometers (um). These pulverized biotite ores may be referred to as raw ore powders, and the pulverized ore powders may be collected and selected as raw ore powders having a relatively high content of mica and a relatively low quartz content than before grinding (S130).

Crushing the mica hairs by colliding with each other (S120) and sorting the raw powders (S130) may be performed sequentially or simultaneously. For example, when stiffheads collide with each other and start grinding, relatively harder shards will be crushed more during the same time, and relatively harder quartz will be crushed only when quartz and other quartz collide with each other. Less grinding can occur in the same amount of time compared to the biotite. Of course, in the case of quartz, if repeatedly collided with minerals of low hardness, fatigue may accumulate and crush (break). After the grinding is progressed to some extent, the grinding is stopped, and the powdered mica and uncrushed mica are collected and filtered through a sieving apparatus, so that the content of the mica is relatively higher and the content of quartz is relatively higher than before grinding. It is possible to screen low raw powders.

As another example, the mica hairs may be pulverized by colliding with each other, and at the same time, only pulverized powder may be sorted using a sieve device to perform mica hair tablets. When a jet mill device is used, the process of colliding and grinding the biotite ore and the process of sorting and refining the ore powders may be simultaneously performed. In addition, the jet mill process can control the grinding pressure and the grinding time to obtain a variety of quality Villite ore powder, can obtain a high purity quartz remaining as a by-product of purification, and can be used with almost no loss in preparation for input ore It has the advantage of being.

The selected raw powders may be further sorted using magnetic force (S140). Magnetic screening is a method of selecting by using the difference between the different magnetic properties of the mineral can be selected from the non-magnetic minerals and useful minerals that are magnetic. Each mineral has its own magnetic susceptibility, which can be divided into three types: ferromagnetic, weak magnetic and diamagnetic (or nonmagnetic) minerals. For example, ferromagnetic minerals include magnetite (Fe ₃ O ₄ ), titanium iron (FeTiO ₃ ) and magnetite iron (Fe _n S _{n + 1} ), and the weak magnetic minerals are hematite (Fe ₂ O ₃ ) and rhomborite (FeCO ₃ ), iron manganese ((Fe, Mn) WO ₄ ) and rutile (TiO ₂ ), and the diamagnetic minerals include pyrite (FeS ₂ ), zinc zinc (ZnS) and coarse minerals (quartz, feldspar, mica). ). Each mineral may be selected by varying the intensity of the magnetic force, for example, the ferromagnetic mineral and the weak magnetic mineral may be selected separately.

Therefore, when the raw ore powders having a relatively high content of biotite and quartz having a relatively low content of quartz are selected by a magnetic separator, minerals such as pyrite, magnetite, and chlorite, which are included in the biotite, are selected. On the other hand, it is important to completely separate the useful minerals and the useless minerals contained in the ore because the sorting process of the mineral resources is a screening operation between the minerals for selecting the useful minerals from the useless minerals. However, when such a single separation (團體 分離) is insufficient, and the presence of unseparated particles, useful minerals can be removed together in the process of screening useless minerals.

The raw ore powders which have undergone magnetic screening to sort out the unseparated dance minerals may be further subjected to acid treatment (S150). Magnetic screening for chorionic vitreous particles may leave unselected iron. Therefore, acid treatment may be performed with a hydroxyl or hydrochloric acid solution to remove these unselected iron.

FIG. 2 is a flowchart schematically illustrating a method for refining a biotite according to another embodiment of the present invention, and FIG. 3 is a flowchart specifically illustrating a grinding step of biotite ore. In the method of purifying the chorionic mica according to the present embodiment, reference may be made to the description of FIG. 1 described above, and redundant description may be omitted.

Referring to FIGS. 2 and 3, the method of purifying the biotite from another viewpoint may include providing the first biotite and the second biotite including the quartz and the biotite (S210). The first biotite and the second biotite may include quartz, biotite, and the like, and may be crushed by colliding the first biotite and the second biotite with each other by using a relative hardness difference between the quartz and the biotite. There is (S220). Looking specifically at the grinding process, the step of crushing the mica in the second biotite by quartz or mica in the first biotite (S221) and the quartz in the second biotite or mica in the first biotite It may include the step of crushing the mica (S223) (see Figure 3). Therefore, it is possible to selectively grind the mica by different hardness.

Thereafter, the first biotite ore and the second biotite ore are collected to sort the raw ore powders having a relatively higher content of biotite and a relatively low quartz content than before grinding, and then the first biotite ore and Cilia can be purified from the second biotite.

Domestically produced mica is relatively low in quality compared to foreign mica, which does not meet the demands of the demander, and the use of imported mica is about 22 times higher than the average selling price. According to the mineral resource reserves issued in 2011, domestic biotite reserves are 687.7 million tons, the potential value of which is more than about 500 billion yuan). Therefore, by using the biotite purification method as described above, it is possible to provide a high-quality biotite of the desired value through a simple dry grinding process, even using domestic low-quality biotite.

Hereinafter, experimental examples are provided to facilitate understanding of the present invention. It should be understood, however, that the following examples are for the purpose of promoting understanding of the present invention and are not intended to limit the scope of the present invention.

First, the stiff wool has used a stiff wool raw powder in order to consider the grinding effect more accurately, and the initial stiff wool raw powder used a powder having a uniform particle size between 60 ~ 100 mesh (mesh size: 150 ~ 250um).

Figure 4 shows the results of X-ray diffraction analysis (XRD) of the chorionic raw light powder provided in the experimental example of the present invention, the composition of which was analyzed by X-ray fluorescence analysis (XRF) 85.7wt% SiO ₂ and 8.34 wt% Al ₂ O ₃ .

Figure 5 is a schematic diagram schematically showing the appearance of a jet mill device for pulverizing the biotite used in one experimental example of the present invention.

Referring to Figure 5, in order to remove quartz contained as impurities in the biotite ore, a jet mill apparatus 100 for colliding and grinding the biotite raw powder by using the relative hardness difference between the quartz and the biotite was used. The used jet mill device 100 includes a chorionic raw material input device 110 for introducing the chorionic raw light powder 110, a transfer pipe 115 for transferring the chorionic raw light powder, and a chorionic raw light powder injection port for injecting the chorionic raw light powder into the grinding chamber 120 ( 124), the pulverization chamber 120 in which the chorionic raw light powder is pulverized, a first cyclone 130 for selecting the pulverized powder (raw light powder), and a primary collection container 135 for collecting the powder selected in the first cyclone 135 ), And the second cyclone 140 and the secondary collection container 145, and the like.

6 is a plan view of the grinding chamber, and FIG. 7 is a cross-sectional view of the grinding chamber. 6 and 7, in the jet mill process, as described above, the grinding pressure and the grinding time may be adjusted to obtain mica ore powder of various grades. The grinding pressure is again the first pressure (pusher nozzle pressure, 121) for injecting the chorionic wool raw powder 200 into the grinding chamber using the carrier gas and the second grinding mill while flowing the chorionic wool raw powder 200 in the grinding chamber. Pressure (grinding nozzle pressure, 122). Since the injection direction of the first pressure 121 is shifted from the center of the grinding chamber 120, the air flow turning in the grinding chamber 120 is formed. The arrow of FIG. 6 shows this swirl flow direction.

The second pressure 122 also injects air into the grinding chamber 120 to strengthen and maintain the swirl flow formed in the grinding chamber 120 by the first pressure 121, and the second pressure 122. A plurality of nozzles for spraying may be installed. Discharge port 125 is formed in the center of the grinding chamber 120, through the discharge port 125, the chondrial raw powder and air escapes to the outside. In order to add the chorionic raw light powder 200, the first pressure (pusher nozzle pressure, 121) had to be greater than or equal to the second pressure (grinding nozzle pressure, 122). The return gas was compressed air, and the grinding effect and the purification effect were investigated according to the grinding pressure.

Table 1 shows the first pressure 121 and the second pressure 122 which are the total pressure in the grinding step, respectively, and Table 2 shows the grinding amount according to the grinding pressure (total pressure). At this time, the height (d) of the grinding chamber and the primary cyclone was 300mm, and the powder was fed into the mica wool orifice inlet 124 at a time, and the grinding time was fixed at 30 minutes.

Total pressure 0.10 0.20 0.35 0.45 0.50 0.65 Grinding Pressure (MPa) First pressure 0.05 0.1 0.2 0.25 0.3 0.4 Second pressure 0.05 0.1 0.15 0.2 0.2 0.25

Grinding Pressure (MPa) 0.10 0.20 0.35 0.45 0.50 0.65
Grinding amount (g)
1st collection container 1.09 2.00 6.04 7.92 13.01 36.52 2nd collection container 0.02 0.15 0.31 0.20 0.23 0.29 Total amount 1.11 2.15 6.35 8.12 13.24 36.81 Grinding chamber residual amount (g) 48.14 46.75 41.83 40.28 34.84 11.24 Total amount of powder (g) 49.25 48.90 48.18 48.4 48.08 48.05

Referring to Table 2, as the grinding pressure increased, the amount of powder collected in the collecting container increased. In addition, as the grinding pressure increases, the total amount of the powder in the collecting container and the amount of the powder remaining in the grinding chamber decreases, and as the pressure increases, the amount of loss increases.

Table 3 is a result of classifying the powder collected in the primary collection container for each mesh to investigate the actual grinding effect, and shows the amount of powder for each mesh according to the grinding pressure.

Crushing Pressure (MPa) 0.10 0.20 0.35 0.45 0.50 0.65
1st Gathering
In a container
Powder volume (g) 100 mesh (O / F) 0.58 0.03 0.81 0.40 3.30 24.43 100 to 200 mesh 0.25 0.86 1.80 4.51 4.76 6.49 200 to 400 mesh 0.11 0.43 2.78 1.65 3.83 3.37 400 mesh (U / F) 0.02 0.55 0.54 1.17 0.80 1.92 100 mesh (U / F) 0.38 1.84 5.12 7.33 9.39 11.78

Referring to Table 3, it can be said that the grinding effect is halved because the amount of 100 mesh (O / F) is rapidly increased at a grinding pressure of 0.5 MPa or more.

Figure 8 is a graphical representation of the data of Table 3 using a bar graph shows the percentage of the amount of powder for each mesh according to the grinding pressure. Referring to FIG. 8, in the case where the grinding pressure is 0.1 MPa and 0.5 MPa or more, more than 100 meshes of unmilled powder are present in a relatively larger amount than the 0.2 MPa to 0.45 MPa range, thereby reducing the grinding effect. have. Therefore, in terms of the grinding effect, the grinding pressure was found to be suitable for the grinding pressure in the range of 0.2MPa ~ 0.45MPa.

9 shows the results of X-ray diffraction analysis of the powder collected in the primary collection container while changing the grinding pressure.

Referring to FIG. 9, it can be seen that there is a refining effect of quartz (Quartz) clearly until the grinding pressure is 0.35 MPa as compared with FIG. 4. Therefore, in consideration of both grinding and refining effects, the grinding pressures were 0.2MPa and 0.35MPa.

Table 4 shows the amount of grinding according to the height (see Fig. 5, d) between the grinding chamber and the primary cyclone.

Crushing Zone and Primary Cyclone
Height between (mm) 300 450 600 750 900 1050 1200
1st Gathering
In a container
Powder volume (g) 100 mesh (O / F) 0.04 0.04 0.04 0.02 0.04 0.02 0.03 100 to 200 mesh 0.31 0.48 0.58 0.84 0.14 0.38 0.55 200 to 400 mesh 1.51 1.14 0.34 0.64 0.53 0.97 0.30 400 mesh (U / F) 0.49 0.50 0.86 0.07 1.21 0.16 0.59 100 mesh (U / F) 2.31 2.12 1.78 1.55 1.88 1.51 1.44

Referring to Table 4, as the height between the grinding chamber and the first cyclone was also reduced because the amount of 100 mesh (U / F) was also shown that the amount of the powder is actually crushed. Therefore, it can be said that the height between the grinding chamber and the primary cyclone is most suitable in terms of the grinding effect.

10 shows the results of X-ray diffraction analysis of the pulverized powder according to the powder injection time. 50 g of villi ore powder having a particle size of 60 mesh to 100 mesh is fed into the villus ore inlet 124 of the jet mill apparatus 100 at once (feeding time <1 min) and over 20 minutes. Purification effect was measured by dividing the case (injection time: 20 min). At this time, the grinding pressure was 0.2MPa, the height between the grinding zone and the primary cyclone (see Fig. 5, d) was 300mm, the grinding time was 30 minutes.

21°의 석영 피크에 대한 2θ

18°의 견운모 피크의 상대적인 회절강도가 더 크다.Referring to FIG. 10, when the powder is added at a time, the relative diffraction intensity of the mica peak is greater than that of feeding over 20 minutes. For example, 2θ

2θ for 21 ° quartz peak

The relative diffraction intensity of the biotite peak at 18 ° is greater.

18°의 견운모 피크의 회절강도가 20분에 결쳐 공급하는 경우보다 더 크다. 따라서 분말의 공급시간이 짧을수록 정제효과는 더 크다고 할 수 있다.FIG. 11 shows X-ray diffraction analysis results of the same conditions as those of FIG. 10 but only a crushing pressure of 0.35 MPa.

The diffraction intensity of the viscous peak of 18 ° is greater than that supplied in 20 minutes. Therefore, the shorter the feeding time of the powder, the greater the purification effect.

Table 5 shows the amount of powder collected in the primary collection container according to the grinding time of the powder (the grinding pressure was tested at 0.2MPa and 0.35MPa).

Crushing Pressure (MPa) 0.20 0.35 1st collection container
Powder amount (g) Compared to input ore
Cumulative recovery rate of powder (%) 1st collection container
Powder amount (g) Compared to input ore
Cumulative recovery rate of powder (%)

smash
time
(hr) 0 to 0.5 2.38 4.76 4.57 9.14 0.5 to 1 1.34 7.44 2.07 13.28 1-2 1.46 10.36 2.88 19.04 2-3 1.18 12.72 2.43 23.9 3 to 4 1.16 15.04 2.39 28.68 4 to 5 0.96 16.96 2.48 33.64 5 to 6 0.58 18.12 2.33 38.3

Referring to Table 5, according to the grinding time of the powder at 0.2MPa and 0.35MPa, the amount of powder collected in the primary collecting container decreased as the amount of powder collected in the collecting container was longer as the grinding time increased.

12 shows the results of X-ray diffraction analysis of the powder collected in the primary collection container for each grinding time at a grinding pressure of 0.2MPa.

21°의 석영 피크에 대한 2θ

18°의 견운모 피크의 상대적인 회절강도를 비교한 결과 3시간 이후부터는 정제효과가 떨어짐을 알 수 있다. 또한, 0.35MPa의 분쇄압력에서는 0.5시간 이후부터 정제효과가 떨어짐을 알 수 있다(도 13 참조). 따라서, 분쇄압력을 0.2MPa로 하였을 때는 분쇄시간을 3시간으로 하는 것이 최적의 정제효과를 얻을 수 있으며, 표 5로부터 약 13%의 투입원광 대비 분말 회수율을 얻을 수 있었다. 2θ with reference to FIG. 12

2θ for 21 ° quartz peak

As a result of comparing the relative diffraction intensity of the 18 ° chorionic peak, it can be seen that the purification effect is lowered after 3 hours. In addition, it can be seen that the refining effect is reduced from 0.5 hours after the grinding pressure of 0.35MPa (see Fig. 13). Therefore, when the grinding pressure is 0.2MPa, it is possible to obtain the optimum refining effect by setting the grinding time to 3 hours, and it is possible to obtain a powder recovery rate of about 13% input ore from Table 5.

FIG. 14 shows the results of X-ray diffraction analysis of powders removed by virtue of biotite powder pulverized through a jet mill process.

Referring to FIG. 14, it can be seen that the removed powder mainly contains chlorite, and some unseparated quartz and sorghum are also included.

FIG. 15 is an optical micrograph before acid treatment of magnetically selected biotite powders, and FIG. 16 is an optical micrograph of raw powders after acid treatment. 15 and 16, it can be seen that the powder after acid treatment is much brighter and whiter. Therefore, it was found that the iron removal was performed by hydrochloric acid treatment.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: jet mill device 110: Cicada fluorescence input device
120: grinding chamber 121: first pressure
122: second pressure 124: chorionic wool orifice inlet
125: outlet 130: first cyclone
135: 1st collection container 140: 2nd cyclone
145: secondary collection container 200: Cicada raw light powder

Claims (11)

Providing a plurality of biotite ore including quartz and biotite;
Pulverizing the chorionic ore by colliding with each other; And
Collecting the pulverized biotite ore to sort the raw powders having a relatively higher content of the mica and a relatively lower content of quartz than before the crushing;
Containing, chorionic purification method. The method of claim 1,
And pulverizing the mica hairs by colliding with each other comprises colliding and grinding the mica hairs with a jet mill. The method of claim 1,
The step of crushing the mica hairs by colliding with each other, the crushed by the collision of the mica hairs without the use of a separate external crushed medium, the stiff hair wool purification method. The method of claim 1,
The biotite ore comprises at least one of the biotite ore and crushed biotite powder. 5. The method of claim 4,
The biotite powder has a particle size of 10 to 200 mesh (mesh), the biotite purification method. The method of claim 1,
After the step of sorting the raw powders,
Further selecting the raw powders using a magnetic force; And
Acid treating the raw powders;
Further comprising, the mica hair purification method. The method according to claim 6,
The acid treatment of the raw powders includes a step of treating with a hydroxyl or hydrochloric acid solution. The method of claim 1,
The grinding step and the screening step is performed at the same time, chorionic purification method. The method of claim 1,
The step of screening is performed after the milling, chorionic purification method. Providing a first biotite and second biotite ore comprising quartz and biotite, respectively;
Colliding and grinding the first biotite and the second biotite; And
Collecting the pulverized first biotite and the second biotite ore to sort the raw powders having a higher content of the mica and a lower content of quartz than before the crushing;
Containing, chorionic purification method. The method of claim 10,
The grinding step is
Crushing the mica in the second biotite by quartz or biotite in the first biotite; And
Pulverizing the biotite in the first biotite ore by quartz or biotite in the second biotite;
Containing, chorionic purification method.

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