A method for evaluating the performance of organic binders suitable for sintering production

Abstract

A method for evaluating the performance of an organic binder suitable for sintering production relates to the field of iron and steel metallurgy. First, a reasonable addition method and addition amount are determined based on the characteristics of the organic binder used, and then the amount of impurities brought into the organic binder and the basic performance of the quasi-particles at room temperature after the addition of the organic binder are detected and analyzed. Finally, the various indicators tested are compared with the benchmark samples without the addition of the organic binder, and the performance of the organic binder used is evaluated based on the effect. The beneficial effect of the present invention is that this evaluation method can intuitively understand the degree of improvement in the room-temperature performance of the quasi-particles after different types of organic binders are added to the sintering mixture, as well as the extent of the impact on sintering production and finished ore, and assign values ​​through the results of various evaluation indicators, and finally obtain the organic binder that is most suitable for sintering production.

Description

Technical Field

[0001] The present invention relates to the field of iron and steel metallurgy, and in particular to a method for evaluating the performance of an organic binder suitable for sintering production. Background Art

[0002] With the development of the steel industry, blast furnaces have become increasingly larger, and the requirements for raw materials entering the furnaces have become increasingly stringent. As the primary raw material in my country's blast furnaces, sintered ore is subject to strict quality control. Therefore, improving quality and increasing production is the current focus of the sintering industry. As the saying goes, "where there is wind, there is ore," improving the permeability of the feed bed is a key means of increasing sintering capacity. To improve the permeability of the feed bed during the sintering process and allow more effective air to enter the sintering bed, some companies have begun adding organic binders to the sintering pelletizing process to improve the particle size composition of the sintering mix, thereby achieving the goal of improving the permeability of the feed bed. Regarding the application of organic binders, it is more in the field of pellet production. In order to solve the defects of pellet binders in the existing technology and the problem that sintered ore is affected by MgO, Chinese invention patent CN107345273A provides a magnesium-based organic binder for pellets and its preparation and use method, which effectively improves the compressive strength and iron grade of the finished pellets; Chinese invention patent CN1099423 provides an organic binder for pellets and sintered ore, which has a significant impact on improving the iron grade of raw materials, reducing energy consumption, and increasing production.

[0003] As can be seen from the above scheme, organic binders are more common in pellet production, but there are no relevant evaluation criteria for their impact on sintering production. Commonly used organic binders in China include glutinous rice flour, modified starch, polyacrylamide, and Peridot. Faced with a wide variety of organic binders, which one is most suitable for sintering production? Will the effect of organic binders after addition affect the chemical composition of sintered products? How should organic binders be added to maximize their effectiveness? There is no relevant information on the improvement of pelletized quasi-granular performance before and after the addition of organic binders.

[0004] In view of this, there is an urgent need for a performance evaluation method for organic binders suitable for sintering production. This method would allow companies to have relevant laboratory evaluation standards to test and analyze organic binders before adding them, thereby reducing fluctuations in performance during production. Therefore, a performance evaluation method for organic binders suitable for sintering production was invented to address the gaps in existing evaluation methods and to solve or alleviate one or more of the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings and defects in the existing technology and provide a performance evaluation method for an organic binder suitable for sintering production. This evaluation method can intuitively understand the degree of improvement in the room-temperature performance of quasi-particles after different types of organic binders are added to the sintering mixture, as well as the impact on sintering production and finished ore. It also assigns values ​​through the results of various evaluation indicators, and ultimately obtains the organic binder that is most suitable for sintering production.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a method for evaluating the performance of an organic binder suitable for sintering production, firstly determining a reasonable addition method and addition amount according to the characteristics of the organic binder used, then detecting and analyzing the amount of impurities brought into the organic binder and the basic performance of the quasi-particles at room temperature after the addition of the organic binder, finally, comparing the various detected indicators with the benchmark sample without the addition of the organic binder, and assigning a value to evaluate the performance of the organic binder used according to the effect.

[0007] As a more specific explanation of the present invention: there are two reasonable ways to add the organic binder. One is to first dissolve the organic binder in high-temperature water, and then enter the sintered mixture with water during the first and second mixing processes to help it form quasi-particles; the other is to directly add it to the sintered mixture, and then fully mix it with the mixture during the first and second mixing processes to help it form quasi-particles.

[0008] As a more specific description of the present invention: the amount of impurity elements introduced into the organic binder, the operating steps are: sampling 3 groups of organic binders used, 10g of each group, fully dissolving them in water to form 100ml of solution, respectively determining the content of K, Na and Cl in the organic binder by chemical titration, and calculating the amount of impurity elements introduced based on the proportion of organic binder added in the sintering raw materials. The impurity element introduction amount is calculated as follows: total =ω obb (θ K +θ Na +θ Cl ), where I Total is the amount of impurity elements introduced into the organic binder, %; ωobb is the amount of organic binder added, %; θ K ,θ Na ,θ Cl are the contents of K, Na and Cl in the organic binder, %.

[0009] As a more specific description of the present invention: the basic properties of the quasi-particles at room temperature mainly include the average particle size of the quasi-particles, the drying powder removal rate, the compressive strength and the air permeability index.

[0010] As a more specific description of the present invention: the average particle size of the quasi-particles in the basic performance of the quasi-particles at room temperature is mainly detected by the following method: 1 kg of sintering mixture is prepared according to the benchmark sintering raw material structure and divided into two parts, the first part is added with an organic binder on the original basis, and the second part remains unchanged, and 8% of 80°C high-temperature water is added to the two parts of the mixture at the same time. After being fully mixed, they are placed in a 200mm×500mm drum respectively, rotated at a speed of 30r / min for 3min, and then condensed with liquid nitrogen, and the quasi-particles in the drum are taken out for particle size screening, and the average particle size of the quasi-particles is calculated according to the weighted average of their particle size ratios. At the same time, the increase ratio of the average particle size of the quasi-particles before and after the use of the organic binder is determined. The calculation formula is: d=0.5×m -1mm +2×m 1-3mm +4×m 3-5mm +6.5×m 5-8mm +9×m +8mm , where d is the average particle size, mm; m -1mm ~m +8mm Respectively represent the proportion of each particle size range in the quasi-particles, %.

[0011] As a more specific description of the present invention: the drying powder removal rate in the basic performance of the quasi-particles at room temperature, its detection method is mainly as follows: 2kg of sintering mixture is prepared according to the benchmark sintering raw material structure, and divided into four parts, two of which are added with organic binders on the original basis, and the other two parts remain unchanged, and 8% of 80°C high-temperature water is added to the four parts of the mixture at the same time. After sufficient mixing, they are placed in a 200mm×500mm drum respectively, rotated at a speed of 30r / min for 3min, and then condensed with liquid nitrogen, and the quasi-particles in the drum are taken out, among which one sintered quasi-particle with an organic binder and one sintered quasi-particle that remains unchanged are selected, and the particle size is screened and the average particle size is calculated. Subsequently, the other two quasi-particle samples are placed in a drying oven and baked at 105°C for 48h to ensure that all physical water is evaporated. The quasi-particle drying powder removal rate is calculated according to the change in the average particle size of the quasi-particles before and after drying, and the improvement ratio of the quasi-particle drying powder removal rate before and after the use of the organic binder is determined. The drying powder removal rate calculation formula is: Where DRR (Drying removal rate) is the drying removal rate of quasi-particles, %; d is the original average particle size of quasi-particles, %; d D The average particle size of the quasi-particle dry sieve is %.

[0012] As a more specific description of the present invention: the air permeability index of the basic performance of the quasi-particles at room temperature is tested using the JPU air permeability index testing method. The main steps are: preparing 1 kg of sintering mixture according to the benchmark sintering raw material structure and dividing it into two parts. The first part is added with an organic binder on the original basis, and the second part remains unchanged. 8% of 80°C high-temperature water is added to the two parts at the same time. After being fully mixed, the two parts are placed in a 200mm×500mm drum respectively, rotated at a speed of 30r / min for 3 minutes, and the quasi-particles in the drum are taken out and placed in a JPU air permeability index testing device for air permeability index testing. The test results are recorded, and the improvement ratio of the air permeability index before and after the use of the organic binder is determined.

[0013] As a more specific description of the present invention: the compressive strength of the basic performance of the quasi-particles at room temperature, the main testing steps are: prepare 1 kg of sintering mixture according to the benchmark sintering raw material structure, and divide it into two parts, the first part is added with an organic binder on the original basis, and the second part remains unchanged, and 8% of 80°C high-temperature water is added to the two parts of the mixture at the same time. After fully mixing, they are placed in a 200mm×500mm drum respectively, and rotated at a speed of 30r / min for 3min. Then, the quasi-particles in the drum are taken out and placed in a drying box, and baked at 105°C for 48h to ensure that all the physical water is evaporated. After taking out, 10 3-5mm quasi-particle samples are screened out respectively, and the compressive strength of the quasi-particles is tested and analyzed using a compressive strength tester, the test results are recorded, and the improvement ratio of the compressive strength before and after the use of the organic binder is determined.

[0014] As a more specific description of the present invention, the main steps of the value assignment evaluation are: sorting out the amount of impurities brought into the organic binder and the average particle size, drying powder removal rate, air permeability index, and degree of improvement in compressive strength of the organic binder before and after use, a total of 5 groups of detection indicators, assigning values ​​according to weights and adding them up to obtain the final evaluation score of the organic binder. The value assignment evaluation calculation method is as follows:

[0015]

[0016]

[0017]

[0018]

[0019] grade=25×σ obb-d +25×σ obb-DRR +25×σ obb-J.P.U +25×σ obb-F -5000×I total

[0020] Among them, σ obb-dis the percentage increase in the average particle size of quasi-particles after adding organic binder, %; σ obb-DRR is the reduction ratio of the drying powder loss rate of quasi-granules after adding organic binder, %; σ obb-J.P.U The percentage of the quasi-particle permeability index increased after adding the organic binder, %; σ obb-F is the percentage increase in the compressive strength of quasi-particles after adding organic binder, %; grade is the evaluation score of organic binder, dimensionless.

[0021] After adopting the above technical solution, the beneficial effect of the present invention is: this evaluation method can intuitively understand the degree of improvement of the room-temperature performance of quasi-particles after different types of organic binders are added to the sintering mixture, as well as the impact on sintering production and finished ore, and assign values ​​through the results of various evaluation indicators, and finally obtain the organic binder that is most suitable for sintering production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a diagram of the evaluation system for sintering organic binders of the present invention. DETAILED DESCRIPTION

[0024] See Figure 1 As shown, the technical solution adopted in this specific embodiment is: first, a reasonable addition method and amount are determined according to the characteristics of the organic binder used, and then the amount of impurities brought into the organic binder and the basic performance of the quasi-particles at room temperature after the addition of the organic binder are tested and analyzed. Finally, the various test indicators are compared with the benchmark samples without adding organic binder, and the performance of the organic binder used is evaluated based on the effect.

[0025] In this embodiment, a sintering mixture is blended based on a sintering site of a certain enterprise. The sintering mixture is blended using a ore blending scheme as shown in Table 1. In the ore blending process, three organic binders A, B, and C are used for quasi-granular granulation, and the blending amount is 1%. The addition method is to first dissolve the organic binder in high-temperature water, and then enter the sintering mixture with water in the first and second mixing processes to help it form quasi-granules. The impurity element content of the three organic binders is shown in Table 2.

[0026] Table 1 Sintering mixture ore distribution scheme, %

[0027]

[0028] Table 2 Impurity element content in organic binder, %

[0029]

[0030] Experimental process

[0031] The average particle size of the quasi-particles in the basic performance of the quasi-particles at room temperature was tested and analyzed. A sintering mixture was prepared according to the structure of the benchmark sintering raw materials. Different types of organic binders were added on the original basis, and 8% of 80°C high-temperature water was added. After being fully mixed, they were placed in a 200mm×500mm drum and rotated at a speed of 30r / min for 3min. Then, they were condensed with liquid nitrogen, and the quasi-particles in the drum were taken out for particle size screening. The average particle size of the quasi-particles was calculated based on the weighted average of their particle size proportions. At the same time, the increase ratio of the average particle size of the quasi-particles before and after the use of the organic binder was determined. The calculation formula is as follows:

[0032] d=0.5×m -1mm +2×m 1-3mm +4×m 3-5mm +6.5×m 5-8mm +9×m +8mm

[0033] Where d is the average particle size, mm; m -1mm ~m +8mm Respectively represent the proportion of each particle size range in the quasi-particles, %.

[0034] The drying and powder removal rate of the basic performance of the quasi-particles at room temperature was tested and analyzed. A sintering mixture was prepared according to the structure of the benchmark sintering raw materials and divided into several parts on average. Three organic binders were added on the original basis, and 8% of 80°C high-temperature water was added. After being fully mixed, they were placed in a 200mm×500mm drum and rotated at a speed of 30r / min for 3min. Then they were condensed with liquid nitrogen, and the quasi-particles in the drum were taken out. One of the sintered quasi-particles was taken out, and the particle size was screened and the average particle size was calculated. Then another quasi-particle sample was placed in a drying oven and baked at 105°C for 48h to ensure that all its physical water was evaporated. It was taken out for particle size screening and the average particle size was calculated. The drying and powder removal rate of the quasi-particles was calculated based on the change in the average particle size of the quasi-particles before and after drying. The calculation formula for the drying and powder removal rate is as follows:

[0035]

[0036] Wherein, DRR (Drying removal rate) is the drying removal rate of quasi-particles, %; d is the original average particle size of quasi-particles, %; d D The average particle size of the quasi-particle dry sieve is %.

[0037] The air permeability index of the basic performance of the quasi-particles at room temperature was tested and analyzed using the JPU air permeability index test method. The main steps were to prepare a sintering mixture according to the structure of the benchmark sintering raw materials, and add different types of organic binders and 8% 80°C high-temperature water. After fully mixing, the mixtures were placed in a 200mm×500mm drum and rotated at a speed of 30r / min for 3min. The quasi-particles in the drum were taken out and placed in the JPU air permeability index test equipment for air permeability index test, and the test results were recorded.

[0038] The compressive strength of the basic performance of the quasi-particles at room temperature was tested and analyzed. The sintering mixture was prepared according to the benchmark sintering raw material structure, and different types of organic binders were added respectively, and 8% of 80℃ high-temperature water was added. After fully mixing, they were placed in a 200mm×500mm drum and rotated at a speed of 30r / min for 3min. Then, the quasi-particles in the drum were taken out and placed in a drying box, and baked at 105℃ for 48h to ensure that all the physical water was evaporated. After taking out, 10 3-5mm quasi-particle samples were screened out, and the compressive strength of the quasi-particles was tested and analyzed using a compressive strength tester, and the test results were recorded.

[0039] Experimental results and analysis

[0040] Based on the above experimental process, the basic performance of the quasi-particles at room temperature after adding three kinds of organic binders A, B, and C to the sintered mixture and without adding organic binders was finally obtained. The test results are shown in Table 3. As can be seen from Table 3, compared with the sintered quasi-particles without adding organic binders, the basic performance of the sintered quasi-particles at room temperature obtained after adding organic binders is greatly improved. Among them, the improvement of the basic performance of the quasi-particles at room temperature is the largest after the addition of organic binder B. The average particle size of the sintered quasi-particles is increased from 3.77mm to 4.98mm, the drying powder removal rate is reduced from 42.27% to 23.68%, the permeability index is increased from 313.26 to 468.18, and the compressive strength of the quasi-particles is also increased from 7.63N to 10.68N; followed by organic binder A, which is added to the sintered quasi-particles. The average particle size of the particles increased from 3.77mm to 4.41mm, the drying powder removal rate decreased from 42.27% to 21.89%, the permeability index increased from 313.26 to 427.44, and the quasi-particle compressive strength also increased from 7.63N to 12.17N; finally, the organic binder C, after being added, the average particle size of the sintered quasi-particles increased from 3.77mm to 4.33mm, the drying powder removal rate decreased from 42.27% to 28.92%, the permeability index increased from 313.26 to 418.63, and the quasi-particle compressive strength also increased from 7.63N to 9.27N.

[0041] Table 3 Basic performance test results of different quasi-particles at room temperature

[0042]

[0043] Finally, the effects of the three organic binders were evaluated by assigning values. The main steps were to sort out the amount of impurities introduced under different organic binder conditions, as well as the average particle size, drying powder removal rate, air permeability index, and degree of improvement in compressive strength before and after the use of the organic binder. The values ​​were assigned according to the weights and summed up to obtain the final evaluation score of the organic binder. The assignment evaluation calculation method is as follows:

[0044]

[0045]

[0046]

[0047]

[0048] grade=25×σ obb-d +25×σ obb-DRR +25×σ obb-J.P.U +25×σ obb-F -5000×I total

[0049] Among them, σ obb-d is the percentage increase in the average particle size of quasi-particles after adding organic binder, %; σ obb-DRR is the reduction ratio of the drying powder loss rate of quasi-granules after adding organic binder, %; σ obb-J.P.U The percentage of the quasi-particle permeability index increased after adding the organic binder, %; σ obb-F is the percentage increase in the compressive strength of quasi-particles after adding organic binder, %; grade is the evaluation score of organic binder, dimensionless.

[0050] The calculation results are shown in Table 4. It can be seen that among the three organic binders, organic binder A has the best comprehensive effect, and its final score is 34.31; although organic binder B has the best overall effect after being added, it ranks second in the final score due to the high content of impurity elements such as K, Na, and Cl in it; although organic binder C is not as effective as the first two organic binders in improving the sintering of quasi-particles, it can still be used as a preferred organic binder if the cost is low.

[0051] Table 4 Calculation results of different quasi-particle assignments

[0052]

[0053] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for evaluating the performance of an organic binder suitable for sintering production, characterized in that: First, the appropriate method and amount of addition are determined based on the characteristics of the organic binder used. Then, the amount of impurities introduced by the organic binder and the basic performance of the quasi-particles at room temperature after adding the organic binder are tested and analyzed. Finally, the various test indicators are compared with the benchmark sample without the addition of organic binder, and the performance of the organic binder used is evaluated based on the effect. The amount of impurity elements introduced into the organic binder, and the operation steps are as follows: The organic binders used in three groups were sampled, 10 g each, and fully dissolved in water to form 100 ml of solution. The contents of K, Na, and Cl in the organic binders were determined by chemical titration. The amount of impurity elements introduced was calculated based on the proportion of organic binder added in the sintering raw materials. The calculation formula for the amount of impurity elements introduced is: I total =ω obb (i K +θ Na +θ Cl ) Among them, I Total is the amount of impurity elements introduced into the organic binder, %; ω obb is the amount of organic binder added, %; θ K ,θ Na ,θ Cl are the contents of K, Na and Cl in the organic binder, %; The basic properties of the quasi-particles at room temperature mainly include the average particle size of the quasi-particles, drying powder removal rate, compressive strength and air permeability index; The main steps of the assignment evaluation are: The amount of impurities brought into the organic binder, as well as the average particle size before and after use of the organic binder, the drying powder removal rate, the air permeability index, and the degree of improvement in compressive strength are sorted out. A total of 5 groups of test indicators are assigned values ​​according to the weights and added up to obtain the final evaluation score of the organic binder. The assignment evaluation calculation method is as follows: grade=25×σ obb-d +25×σ obb-DRR +25×σ obb-J.P.U +25×σ obb-F -5000×I total Among them, σ obb-d is the percentage increase in the average particle size of quasi-particles after adding organic binder, %; σ obb-DRR is the reduction ratio of drying powder loss rate of quasi-granules after adding organic binder, %; σ obb-J.P.U The percentage of the quasi-particle permeability index increased after adding the organic binder, %; σ obb-F is the percentage increase in the compressive strength of the quasi-particles after adding the organic binder, %; grade is the evaluation score of the organic binder, dimensionless; d is the average particle size, mm; DRR (Drying removal rate) is the drying removal rate of the quasi-particles, %; JPU is the air permeability index.

2. The method for evaluating the performance of an organic binder suitable for sintering production according to claim 1, wherein: There are two reasonable ways to add the organic binder. One is to first dissolve the organic binder in high-temperature water, and then let it enter the sintered mixture with water during the first and second mixing processes to help it form quasi-particles; the other is to directly add it to the sintered mixture, and then fully mix it with the mixture during the first and second mixing processes to help it form quasi-particles.

3. The method for evaluating the performance of an organic binder suitable for sintering production according to claim 1, wherein: The average particle size of the quasi-particles in the basic properties of the quasi-particles at room temperature is mainly detected by the following method: According to the structure of the benchmark sintering raw materials, 1 kg of sintering mixture was prepared and divided into two parts. The first part was added with an organic binder on the original basis, and the second part remained unchanged. 8% of 80°C high-temperature water was added to both parts. After being fully mixed, they were placed in a 200 mm × 500 mm drum and rotated at a speed of 30 r / min for 3 minutes. They were then condensed with liquid nitrogen, and the quasi-particles in the drum were taken out for particle size screening. The average particle size of the quasi-particles was calculated based on the weighted average of their particle size proportions. At the same time, the increase in the average particle size of the quasi-particles before and after the use of the organic binder was determined. The calculation formula is: d=0.5×m -1mm +2×m 1-3mm +4×m 3-5mm +6.5×m 5-8mm +9 ×m +8mm Where d is the average particle size, mm; m -1mm ~m +8mm Respectively represent the proportion of each particle size range in the quasi-particles, %.

4. The method for evaluating the performance of an organic binder suitable for sintering production according to claim 1, wherein: The dry powder removal rate of the basic performance of the quasi-particles at room temperature is mainly detected by the following method: 2 kg of sintered mixture is prepared according to the structure of the benchmark sintering raw material, and divided into four parts, two of which are added with organic binder on the original basis, and the other two parts remain unchanged. 8% of 80°C high-temperature water is added to the four parts of the mixture at the same time, and after being fully mixed, they are placed in a 200mm×500mm drum respectively, rotated at a speed of 30r / min for 3min, and then condensed with liquid nitrogen, and the quasi-particles in the drum are taken out, among which one sintered quasi-particle with organic binder and one sintered quasi-particle that remains unchanged are selected, and the particle size is screened and the average particle size is calculated. Then, the other two quasi-particle samples are placed in a drying oven and baked at 105°C for 48h to ensure that all the physical water is evaporated. The quasi-particle dry powder removal rate is calculated according to the change in the average particle size of the quasi-particles before and after drying, and the improvement ratio of the dry powder removal rate of the quasi-particles before and after the use of the organic binder is determined. The dry powder removal rate calculation formula is: Where DRR (Drying removal rate) is the drying removal rate of quasi-particles, %; d is the original average particle size of quasi-particles, %; d D The average particle size of the quasi-particle dry sieve is %.

5. The method for evaluating the performance of an organic binder suitable for sintering production according to claim 1, wherein: The air permeability index of the basic performance of the quasi-particles at room temperature is tested using the JPU air permeability index testing method. The main steps are: preparing 1 kg of sintering mixture according to the benchmark sintering raw material structure and dividing it into two parts. The first part is added with an organic binder on the original basis, and the second part remains unchanged. 8% of 80°C high-temperature water is added to both parts. After being fully mixed, the two parts are placed in a 200mm×500mm drum respectively, rotated at a speed of 30r / min for 3 minutes, and the quasi-particles in the drum are taken out and placed in a JPU air permeability index testing device for air permeability index testing. The test results are recorded, and the improvement ratio of the air permeability index before and after the use of the organic binder is determined.

6. The method for evaluating the performance of an organic binder suitable for sintering production according to claim 1, wherein: The compressive strength of the basic performance of the quasi-particles at room temperature is mainly tested in the following steps: According to the structure of the benchmark sintering raw materials, 1 kg of sintering mixture was prepared and divided into two parts. The first part was added with an organic binder on the original basis, and the second part remained unchanged. 8% of 80°C high-temperature water was added to the two mixtures at the same time. After being fully mixed, they were placed in a 200mm×500mm drum and rotated at a speed of 30r / min for 3 minutes. Then, the quasi-particles in the drum were taken out and placed in a drying oven, and baked at 105°C for 48 hours to ensure that all the physical water was evaporated. After taking out, 10 3-5mm quasi-particle samples were screened out respectively, and the compressive strength of the quasi-particles was tested and analyzed using a compressive strength tester. The test results were recorded, and the improvement ratio of the compressive strength before and after the use of the organic binder was determined.

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