KR20200101653A - Refiner plate having vertical bar shape and manufacturing method for the same - Google Patents

Abstract

Disclosed are a refiner plate having a vertical bar shape to reduce energy consumption and improve properties of paper and a manufacturing method thereof. According to the present invention, the refiner plate having a vertical bar shape comprises a plurality of bars used for a paper manufacturing process and the refiner plates are faced to each other. The plurality of bars are formed on a faced surface of the refiner plate at intervals. The plurality of bars are a plurality of vertical bar having a rectangular cross-section and a vertical bar plate including the plurality of vertical bars comprises 0.5-0.57 wt% of carbon (C), 0.65-0.75 wt% of silicon (Si), 0.82-0.92 wt% of manganese (Mn), 0.012-0.015 wt% of phosphorus (P), 0.028-0.033 wt% of sulfur (S), 1.21-1.35 wt% of nickel (Ni), 14.0-15.2 wt% of chrome (Cr), 0.05-0.08 wt% of vanadium (V), 0.38-0.43 wt% of molybdenum (Mo), and the remainder being iron (Fe).

Description

Refiner plate having vertical bar shape and manufacturing method for the same {Refiner plate having vertical bar shape and manufacturing method for the same}

The present invention relates to a refiner plate having a vertical bar shape capable of saving energy and improving paper properties, and a method of manufacturing the same.

The paper industry is a capital-intensive industry, equipment industry, and energy-intensive industry. Despite these characteristics, it is the continuous demand of the paper industry to generate profits and produce products that meet market demand, and in order to meet the demands, it is necessary to maintain the facilities of the factory in the best condition at all times to produce the best quality paper.

In general, the papermaking process involves a wet-end process in which sub-materials including fillers and other additives are involved, along with fibers in a slurry state, and a dry-end process that deals with dried paper in a state where moisture is almost removed. -end process). In general, the wet process is a machine chest through a blend chest or mixing chest in which the chemical pulp of softwood and the chemical pulp of hardwood are refined, and then the thermomechanical pulp and paper, and the paper recovered from the saveall device are mixed together. machine chest). The stock from the machine chest undergoes one more final refining step to control the freeness and formation, and then a thick-stock preparation that maintains a concentration of about 3-5% until it passes through the sutff box. ) Make up the process. The thin-stock preparation process in which the paper material that has left the paper stock is mixed with white water supplied from the silo while passing through a fan pump and is diluted to a concentration of 1% or less begins. It consists of a screen process, a deaerator that removes air from the stock, and an attenuator that stabilizes the pressure pulsation of the stock, and this process is also called a stock approach system. The stock that has passed through the stock introduction part passes through the head box of the paper machine, goes through the papermaking process, and then goes through the press process, and moisture contained in the stock is removed. From the stock composition process to the press process, the wet process is called. On the other hand, the dry part process means from the drying part through the calendering process to the completion process.

This paper-making process is an energy-consuming process and shows very different energy consumption rates for each process. Among them, the paper composition area consumes the most energy, which is 41% of the total paper-making process. Among the stock composition stages, the refining stage is the process that consumes the most energy. Therefore, reducing energy consumption during the refining phase is the biggest challenge for papermakers.

The stock composition process can be said to be the most important process that determines the final properties of paper among all papermaking processes, and various processes such as dissociation, deflaking, refining, saveall, concentration, cleaning, degassing, and screening are applied sequentially. Has become. Among these processes, the process that consumes the most energy can be called refining. The apparatus used for refining is a double disk refiner and a conical refiner. Refining takes place in three major changes as the slurry fibers enter between a fixed disk and a rotating metal disk plate facing each other. First, as the primary wall and the secondary wall of the fiber wall are peeled off during refining, the bond between the fiber wall is broken and water is absorbed therebetween, resulting in swelling and hydration of the fiber. The swollen fibers have a positive contribution to hydrogen bonds between fibers while having an effect on an increase in the bonding area between fibers due to the collapse of the fibers in the papermaking process. Secondly, the fibrils constituting the fiber are peeled off and fines are generated. Finally, as the fibers are broken and cut, the length of the fibers is shortened, and these fibers improve the uniformity or formation of the paper.

Increasing the stock concentration during refining slows the vortex flow in the grooves of the refiner plate and increases the aggregation of fibers, so a plate having a coarser bar pattern (ie, a bar pattern with a wide groove) should be used.

However, since the structure of the refiner according to the prior art is made in a form that follows the existing technical content, there is a problem in that the development of an efficient refiner and performance improvement have not been made.

Registered Patent 10-1811776

An object of the present invention is to solve these problems, and to develop a refiner plate optimized for small and medium-sized paper makers to help reduce cost and improve quality, and for this purpose, a refiner having a wedge-shaped bar shape currently in use By developing a refiner plate having a vertical bar shape instead of a plate, it is to provide a refiner plate having a vertical bar shape that can contribute to reducing refining energy and paper properties when refining softwood pulp made of long fibers, and a method of manufacturing the same.

As a specific means for achieving the above object, the present invention is a refiner having a plurality of bars used in a papermaking process and having a plate mounted to face each other, wherein the plurality of plates have a gap on the surfaces of the plates facing each other of the refiner. Bars are formed, and the plurality of bars are formed in the form of a plurality of vertical bars having a rectangular parallelepiped shape, and the vertical bar plate including the plurality of vertical bars is carbon (C) 0.5-0.57 in weight% , Silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur (S) 0.028-0.033, nickel (Ni) 1.21-1.35, chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, the balance may be made of iron (Fe).

Preferably, in the plurality of vertical bars, the ratio of the width of the bar: the groove between the bars: the groove depth may be 3-5.5: 3-7: 7-10.

Preferably, the vertical bar plate is formed in a rim shape, but may be formed of three segments having an angle of 120 degrees or six segments having an angle of 60 degrees.

Preferably, the vertical bar formed in the segment may be formed to be inclined at an angle with respect to the central radiation.

Preferably, the segment is divided into a plurality of zones along the radiation, and a vertical bar formed in each zone may be formed to be inclined with respect to the radiation at an angle different from that of an adjacent zone.

As a specific means for achieving the above object, the present invention is a method of manufacturing a refiner having a plate mounted so as to face each other and having a plurality of bars used in a papermaking process, and a wax pattern is made out of beeswax using a mold, and then , The step of thickly covering this with a slurry containing ethyl silicate, sand, and water to remove moisture; Dissolving the beeswax by placing the wax pattern in a container for removing wax in which temperature and pressure are constantly adjusted; And producing a sand mold by firing the finished plate mold at a high temperature after de-leading.

Preferably, the step of dissolving the beeswax may be performed at a temperature of 100-150°C and a pressure of 6-10 kg/cm ² .

Preferably, the step of preparing the sand mold may be performed at a temperature of 1000-1050°C.

Preferably, the vertical bar plate is carbon (C) 0.5-0.57, silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur (S) 0.028 in weight percent It may be made of -0.033, nickel (Ni) 1.21-1.35, chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, and the balance iron (Fe).

Preferably, in the plurality of bars, the ratio of the width of the bar: the groove between the bars: the groove depth may be 3-5.5: 3-7: 7-10.

According to the present invention as described above has the following effects.

The present invention can contribute to reducing refining energy and paper properties when refining softwood pulp made of long fibers.

1 is a perspective view of a vertical bar plate according to the present invention.
2 is a perspective view of a segment of a vertical bar plate according to the present invention.
3 is a partial cross-sectional view of a vertical bar plate according to the present invention.
4 is a table showing a method of calculating the cutting edge length of a refiner bar according to the present invention.
5 is a graph showing a comparison graph of the flow rate loss between a vertical bar and a wedge bar.
6 is a graph showing the degree of freeness of a vertical bar and a wedge bar.
7 is a comparison graph of a wedge-shaped bar and a vertical bar.
8 is a bulk comparison graph of pulp fibers refined with vertical bars and wedge bars.
9 is a graph comparing tensile strength of paper refined with vertical bar and wedge bar.
10 is a photograph of a bond between fibrils made through refining and refining fibers.
11 is a graph comparing the bursting strength of the refined paper with a wedge-shaped bar and a vertical bar.
12 is a graph comparing tear strength of refined paper with vertical bar and wedge bar.
13 is a graph showing a comparison of average fiber length and fines content of fibers refined with vertical bars and wedge-shaped bars, and is a graph showing a comparison of average fiber lengths, and FIG. 14 is a graph of fines content.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. The present invention may be implemented in various different forms, and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals are assigned to the same or similar components throughout the specification.

In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the possibility of addition or presence of elements or numbers, steps, actions, components, parts, or combinations thereof is not preliminarily excluded. In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where the other part is "directly below", but also the case where there is another part in the middle.

Hereinafter, a refiner plate having a vertical bar shape according to an embodiment of the present invention will be described in more detail with reference to the drawings.

The refiner plate 10 having a vertical bar shape according to the first embodiment of the present invention is a refiner including a plurality of bars 11a used in a papermaking process and having plates mounted to face each other.

The refiner plate 10 having a vertical bar shape according to the present invention, referring to FIGS. 1 and 3, has a gap on the surface of the plate 10 facing each other of the refiner, and the plurality of bars 11a Is formed, and the plurality of bars (11a) is formed in the form of a plurality of vertical bars having a rectangular parallelepiped shape, and the vertical bar plate 10 including the plurality of vertical bars (11a) has a weight In% carbon (C) 0.5-0.57, silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur (S) 0.028-0.033, nickel (Ni) 1.21-1.35, It may be made of chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, and the balance iron (Fe).

In this case, the vertical bar plate 10 may be actually manufactured in a ratio as shown in Table 1 below.

At this time, the plurality of vertical bars 11a may have a ratio of the width (A) of the bar: the groove between the bars (B): the depth of the groove (C) is 3-5.5: 3-7: 7-10.

At this time, in the present embodiment, the plurality of vertical bars were manufactured in a ratio of the width of the bar: the groove between the bars: the depth of the groove of 1:1.

1 and 2, the vertical bar plate 10 is formed in a ring shape, but consists of three segments 11 having an angle of 120 degrees.

1 to 3, the vertical bar 11a formed on the segment 11 is formed to be inclined at a certain angle with respect to the center radiation.

At this time, the segment 11 is divided into a plurality of zones, here 5, along the radiation, and the vertical bars 11a formed in each zone are formed to be inclined with respect to the radiation at an angle different from that of the adjacent zone. .

Meanwhile, the above-described method for manufacturing a vertical bar plate according to the present invention relates to a method for manufacturing a vertical plate 10 provided with a plurality of bars 11a used in a paper making process and mounted on a refiner to face each other.

The method for manufacturing a refiner plate having a vertical bar shape according to the present invention comprises the steps of making a wax pattern with beeswax using a mold, and then thickly covering it with a slurry of ethyl silicate, sand, and water to remove moisture, And dissolving the beeswax by placing the wax pattern in a container for removing wax in which the temperature and pressure are constantly controlled, and firing the finished plate mold at high temperature after dewaxing to produce a sand mold.

At this time, the step of dissolving the beeswax is performed at a temperature of 100-150°C and a pressure of 6-10 kg/cm ² .

At this time, the step of manufacturing the sand mold is performed at a temperature of 1000-1050°C.

At this time, the vertical bar plate 10 is carbon (C) 0.5-0.57, silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur (S) in weight percent It consists of 0.028-0.033, nickel (Ni) 1.21-1.35, chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, and the balance iron (Fe).

At this time, the plurality of bars may have a ratio of the width (A) of the bar: the groove between the bars (B): the depth of the groove (C) is 3-5.5: 3-7: 7-10.

Hereinafter, a comparison result of the performance of a refiner having a vertical bar plate according to the present invention and a refiner having a conventional so-called wedge-shaped plate is as follows.

First, for the performance test of the conventional wedge-shaped bar and the vertical bar according to the present invention, the softwood bleached kraft pulp used in Jinju M paper mill was used. The softwood pulp was completely dissociated at a concentration of 1.57% in a laboratory valley beater, and concentrated to about 3% concentration after dissociation, and then used for refining.

For refining and papermaking, a laboratory single disk refiner was used to test the performance of wedge-shaped and vertical bar plates. The dimensions of the wedge-shaped bar were bar width 4 mm, groove width 4 mm, and groove depth 6.5 mm. Refining was carried out until the freeness of the pulp stock reached 100 mL, and the amount of paper input and the refining energy were measured at each refining step. After each step of refining was completed, the paper was put into FQA-360 (Fiber Quality Analyzer, Optest, Candada) to measure the length weighted average fiber length (mm) and fines content.Based on ISO 23714, the repair degree of pulp fiber ( water retention value) was measured.

In addition, when refining by each step was completed, paper with a basis weight of 70 g/m ² was manufactured using a square paper machine based on ISO 5629-1, and the manufactured paper was stretched to compare the effect of refining on the physical properties of paper Strength, tear strength, burst strength, and bulk were measured based on ISO 1924-2, ISO 1974, ISO 2758, and ISO 534.

end. Comparison of cutting edge length (CEL) between vertical bar and wedge bar

A vertical bar plate for softwood pulp as shown in FIG. 1 was manufactured through a casting method and used for comparison of physical properties with a wedge-shaped bar. The refining energy (kWh/t) required for each refining step at a rotational speed of 1,218 rpm of these refiners was measured by Equation 1 below, and the CEL of the refiner bar was calculated as shown in FIG. 3 using Equation 2. I did.

Where P _tot = total refiner load power (kW)

P ₀ = Refiner no-load power (kW)

f = flow rate (L/h)

c = stock concentration (t/L) (based on oven-dried pulp weight).

In addition, the cutting edge length (CEL, m/rev) of the refiner plate is divided into 3-4 areas as shown in Fig. 4 according to the bar length of each segment of the plate, and then the number and length of bars for each area are used. It was calculated by Equation 2 below.

Where CEL _zonex = cutting edge length in zone x (m/rev)

N _rotorx = total number of rotor bars in area x

N _statorx = total number of stator bars in area x

L _x = length of bar in area x (m).

CEL is a very important factor in determining the intensity of refining for pulp fibers, and CEL can be used to calculate the specific edge load (SEL) of a refiner used as an index indicating the intensity of refining. Here, the CEL of the wedge bar is 590.8 m/rev, the CEL of the vertical bar is calculated as 706.9 m/rev, and the CEL of the vertical bar is about 20% larger than the CEL of the wedge bar, so the refiner for softwood pulp Despite the plate, it was judged that it would be possible to refining with lower strength than the wedge-shaped bar plate.

I. Flow rate comparison of wedge bar and vertical bar

5 is a graph comparing the flow rate loss rate of paper when refining using a wedge-shaped bar and a vertical bar. The flow rate loss rate was calculated by calculating the amount of paper discharged through the refiner when the paper material was put into the refiner, and this was accumulated for each number of passes to calculate data.

The vertical bar has a rectangular shape between the bar and the bar to minimize the flow loss, but the wedge-shaped bar has a trapezoidal shape between the bar and the bar, which inevitably reduces the amount of stock passing between the bars. In the wedge-shaped bar, as refining proceeds, the rate of decrease in the flow rate passing between the bars increases sharply, but in the case of the vertical bar, the increase width is slower than that of the wedge-shaped bar. Therefore, a papermaker can enjoy a much more advantageous advantage in terms of productivity because it can process a larger amount of stock for the same stock supply at the same time.

All. Comparison of freeness of wedge bar and vertical bar

6 is a graph comparing the refining energy required until reaching a certain degree of freeness when refining with the same softwood bleached kraft pulp. The freeness of pulp refers to the rate at which the diluted pulp stock is dehydrated. If the freeness is high, it means that the dehydration rate of the stock is faster, and when the freeness is low, it means that the cellulose fibers constituting the pulp stock are hydrogen-bonded with water and dehydration speed is very slow. As the refining proceeds, the freeness of the pulp fibers decreases due to internal and external fibrillation, fiber shortening, and fines formation.

Except for the refiner plate pattern, when other operating conditions are the same, the energy required to reach the desired Yeosu-do varies depending on the shape or sharpness of the refiner bar. That is, as the sharpness of the edge of the refiner bar increases, the time required to reach a specific degree of freeness decreases, thereby reducing the refining energy. As shown in FIG. 6, when comparing the vertical bar and the wedge-shaped bar, the energy required to reach 400 mL CSF in Yeosu-do was about 4 times more energy consumed by the wedge-shaped bar. Therefore, it was confirmed that a new type of vertical bar could make a very positive contribution in terms of cost reduction for paper makers.

la. Comparison of repair degree of wedge bar and vertical bar

FIG. 7 is a graph comparing the repair degree of each refining step when refining the same softwood bleached kraft pulp using a wedge-shaped bar and a vertical bar. The water retention of pulp fibers can be said to be an indicator of the ability of pulp fibers to absorb water and swell. When the water retention is high, the bonding ability of kraft pulp is improved, which is very helpful in improving the physical properties of paper. When refining the softwood bleached kraft pulp with a vertical bar and wedge-shaped bar, the repair degree of the pulp refined in the wedge-shaped bar at each refining step was slightly larger. The degree of water retention is largely influenced by the degree of internal and external fibrilization and the content of microfibres. It is estimated that fibers refined with wedge-shaped bars cause more internal and external fibrilization than fiber short-circuiting, and in the case of vertical bars, the sharpness of the bar edges. The degree is better, so it seems that more fines are generated. The softwood pulp refined with wedge-shaped bars appears to have a greater improvement in the repairing capacity of the pulp fibers due to the swelling and fibrilization of the fiber walls.

hemp. Bulk comparison of wedge bar and vertical bar

The bulk of the paper is closely related to the stiffness of the paper, and in terms of cost, it needs to be kept as high as possible when compared at the same basis weight. As shown in FIG. 8, when comparing the bulk of the paper made of the pulp refined with the vertical bar and the wedge bar, the wedge bar exhibited a slightly higher value in each refining step as refining proceeded. This will induce a lot of shortening for the pulp fibers because vertical bars have better sharpness at the corners of the bars than wedge bars during refining, which causes more fine fibers to occur, which is a negative factor for the bulk of the paper. It is presumed to have worked. The bulk of paper is greatly influenced by the amount of microfibers and the degree of bonds between fibers.

In conclusion, in order to minimize the reduction in the bulk of paper when refining the newly developed vertical bar, it is considered that it is very necessary to secure prior data on the operating conditions of the raffiner.

bar. Comparison of tensile strength of wedge bar and vertical bar

9 is a graph comparing the tensile strength of softwood bleached kraft pulp fibers refined with a vertical bar and a wedge bar. The tensile strength of paper is greatly affected by fiber strength, fiber length, and hydrogen bonding between fibers. Hydrogen bonds between fibers are affected by the degree of internal and external fibrillation, the degree of short-circuiting of the fibers, and the degree of fine powder generated in the pulp fibers when the pulp fibers are subjected to refining treatment. By measuring the tensile strength of paper, it is possible to determine the availability of paper exposed to tensile stress during use. Therefore, maintaining the tensile strength of the paper to the maximum can be a method to prevent various problems that may occur in the paper processing step in advance.

The vertical bar maximized the refining effect on the pulp fibers, so that the bonding force between the fibers was maximized in the drying stage of the paper, and this resulted in a tensile strength that was at least twice as high as that of the wedge bar at each refining stage. As the pulp stock passes through the vertical bar, all the positive changes that can occur in the pulp fibers during refining occur within a short time, contributing to the very rapid development of tensile strength. Therefore, it was judged that the vertical narrow bar could contribute very positively to the strength development compared to the existing wedge-shaped bar.

FIG. 10 is a micrograph showing an increase in a bonding area when fiber fibrils delaminated from a fiber secondary wall and refined fibers bond to each other after refining. It can be seen that before refining, the bonding area between the two fibers due to shrinkage of the fibers is smaller than the areas formed by the refined fibers. In addition, it is known that the fibrils or fine particles generated during refining contribute to the improvement of the bonding strength between the fibers, and thus have a positive effect on the improvement of the strength of the paper.

four. Comparison of paper breaking strength of wedge bar and vertical bar

11 is a graph comparing the bursting strength of softwood bleached kraft pulp that has been refined, respectively, with a wedge-shaped bar and a vertical bar. As shown in the tensile strength, the refined pulp fibers increase fiber flexibility, thereby improving the bonding ability of the fibers, thereby improving the strength of the paper. Both the wedge-shaped bar and the vertical bar improved the bursting strength of the paper as the refining proceeded, but the bursting strength of the pulp refined in the vertical bar increased more rapidly. Therefore, the refining energy required to obtain the rupture strength of a specific target value can be saved even more because the target value can be achieved in a short time when the vertical bar is refined, and this contributes to the reduction of manufacturing cost.

Ah. Tear strength comparison of wedge bar and vertical bar

12 is a graph comparing the tear strength of softwood bleached kraft pulp fibers refined with a vertical bar and a wedge bar. The tear strength of paper indicates the degree to which it resists the tearing force applied to the paper, which usually depends on the degree of refining, the strength of the fiber itself, the length of the fiber, and the amount of filler. Among these, it reacts sensitively to changes in fiber length and cohesion between fibers due to refining. In the case of paper with a lot of long fibers, when a tear force is applied, the associated stress can be distributed towards more fibers and more fiber bonds, but short fibers tend to concentrate the stress in a smaller area, making it easier to tear. .

As shown in Fig. 12, both the vertical bar and the wedge-shaped bar induced a lot of fibrilization inside and outside which helps to improve the bonding force between fibers at the initial stage of refining, and thus showed similar tear strength values for the same refining energy. It was found that the vertical bar with sharp sharpness caused more short-circuiting of the fibers and affected the rapid decrease of tear strength. Therefore, when using a vertical bar, it is necessary to minimize the decrease in tear strength through ideal control over the refining energy.

character. Comparison of average fiber length and fines content of wedge-shaped bar and vertical bar

13 and 14 are graphs comparing the length-weighted average fiber length and fines (0.2 mm or less) content after refining the softwood bleached kraft pulp, respectively, with a wedge-shaped bar and a vertical bar.

Both the vertical bar and the wedge bar reduced the average fiber length with refining, which decreased at a very similar rate. Although the reduction in fiber length due to refining occurs, the loss in fiber length itself can be interpreted as occurring under conditions much more mitigated than feared.

However, there is a big difference in the fines content, and as the refining proceeds, the fines content of the pulp fibers refined in the vertical bar started to increase much faster than the pulp fibers refined in the wedge-shaped bar. This is because the sharpness of the vertical bar edge is much better than that of the wedge type, and the cause can be found in the mass separation of fibrils from the primary and secondary walls of the fiber by the rotation of the bar as the pulp fiber passes between the bar and the bar. have.

In conclusion, when the vertical bar is used, the fiber length decreases at a rate similar to that of the wedge-shaped bar, but it has a very great influence on the generation of secondary fines caused by separation from the fiber wall. Therefore, it was determined that if the vertical bar plate was used as a pretreatment device for nanocellulose production, it could be used as a very effective device for producing microfibrillated cellulose.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same idea. It will be possible to easily propose other embodiments by changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

10: vertical bar plate
11: segment 11a: vertical bar

Claims (10)

As a refiner having a plate mounted to face each other and provided with a plurality of bars used in the paper making process,
The plurality of bars are formed with gaps on the surfaces of the plates facing each other of the refiner, and the plurality of bars are formed in the form of a plurality of vertical bars having a rectangular parallelepiped cross section,
The vertical bar plate including the plurality of vertical bars is carbon (C) 0.5-0.57, silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur ( S) 0.028-0.033, nickel (Ni) 1.21-1.35, chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, residual iron (Fe) Having a refiner plate. The method of claim 1,
The plurality of vertical bars is a refiner plate having a vertical bar shape in which the ratio of the width of the bar: the groove between the bars: the groove depth is 3-5.5: 3-7: 7-10. The method of claim 1,
The vertical bar plate is made of a rim shape, the refiner plate having a vertical bar shape consisting of three segments having an angle of 120 degrees. The method of claim 3,
The vertical bar formed in the segment is a refiner plate having a vertical bar shape formed to be inclined at an angle with respect to the central radiation. The method of claim 4,
The segment is divided into a plurality of zones along the radiation, and the vertical bar formed in each zone has a vertical bar shape formed to be inclined with respect to the radiation at an angle different from that of an adjacent zone. A method of manufacturing a refiner plate having a vertical bar shape that is equipped with a plurality of bars used in a papermaking process and mounted to face each other,
Making a wax pattern with beeswax using a mold, and then covering it with a slurry containing ethyl silicate, sand, and water to remove moisture;
Dissolving the beeswax by placing the wax pattern in a container for removing wax in which temperature and pressure are constantly adjusted; And
Sintering the finished plate mold at high temperature after soldering to produce sand molds;
Refiner plate manufacturing method having a vertical bar shape comprising a. The method of claim 6,
The step of dissolving the beeswax is a method for manufacturing a refiner plate having a vertical bar shape at a temperature of 100-150°C and a pressure of 6-10 kg/cm2. The method of claim 6,
The step of manufacturing the sand mold is a method for manufacturing a refiner plate having a vertical bar shape made at a temperature of 1000-1050°C. The method of claim 6,
The vertical bar plate is carbon (C) 0.5-0.57, silicon (Si) 0.65-0.75, manganese (Mn) 0.82-0.92, phosphorus (P) 0.012-0.015, sulfur (S) 0.028-0.033, nickel (Ni) 1.21-1.35, chromium (Cr) 14.0-15.2, vanadium (V) 0.05-0.08, molybdenum (Mo) 0.38-0.43, residual iron (Fe) a vertical bar-shaped refiner plate manufacturing method. The method of claim 6,
The plurality of bars is a method of manufacturing a refiner plate having a vertical bar shape in which the ratio of the bar width: the groove between the bars: the groove depth is 3-5.5: 3-7: 7-10.

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