Graphite tailing roadbed stabilizing material and preparation method thereof

Abstract

The invention discloses a graphite tailing roadbed stabilizing material and a preparation method thereof. The preparation method comprises the following steps: dehydrating and drying graphite tailings, grinding and grading, and adjusting the size of a grading screen for screening; the preparation method comprises the following steps: mixing inorganic binding materials according to a ratio, putting the graphite tailings into stirring equipment, uniformly stirring, adding water, fully stirring and mixing to obtain a mixture, putting the mixture into a forming mold, applying pressure to the forming mold, after upper and lower pressing columns at two ends of the mold completely enter the mold, maintaining the pressure, reversely applying the pressure, and demolding to obtain the graphite tailings composite material. According to the graphite tailing roadbed stabilizing material prepared through the method, the optimal water content is 16.8%, the maximum dry density is 1.70 g / cm < 3 >, the 90-day compressive strength reaches 8.51 MPa, and the graphite tailing roadbed stabilizing material is suitable for being used as a roadbed stabilizing material. The method provides a suitable path for reduction and resourceful treatment of the graphite tailings, and improves the utilization rate of wastes.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed stabilizing material preparation, and in particular to a graphite tailings roadbed stabilizing material and a preparation method thereof. Background Art

[0002] Graphite tailings refer to solid waste generated by graphite deep processing enterprises during mining and beneficiation. For every ton of graphite concentrate produced, about 9 tons of graphite tailings are produced. my country's annual output of graphite concentrate reaches 900,000 tons, and the resulting additional amount of graphite tailings exceeds 8 million tons. Only a small part is used in the production of sintered wall materials, and the rest has not been effectively treated and disposed of. Harm to the environment: The large-scale storage of graphite tailings not only occupies land resources, but also poses a risk of tailings dam collapse, causing landslides, mudslides and other disasters. In order to eliminate pollution, graphite tailings should be harmlessly treated and comprehensive utilization of graphite tailings should be carried out.

[0003] In the existing technology, the utilization of graphite tailings is basically discharged into tailings ponds. In recent years, measures such as equal or reduced replacement have been taken to implement total control of tailings ponds. In principle, the number of tailings ponds can only decrease and not increase. This has greatly increased the pressure on graphite deep processing enterprises to handle and dispose of the increasing amount of graphite tailings. Therefore, it is urgent to propose practical and feasible disposal methods for graphite tailings, which can have certain economic benefits on the basis of bulk consumption, and help the green and sustainable development of graphite deep processing enterprises.

[0004] As a basic material for highway construction, roadbed stabilization materials can effectively improve the bearing capacity and durability of the road surface. In recent years, my country has been vigorously carrying out highway infrastructure construction, and roadbed stabilization materials have been widely used, with a large market capacity. Existing roadbed materials usually use artificial or natural sand and gravel, because natural sand and gravel have fine particles, good filling and stability, and machine-made sand and gravel have good bearing capacity; but both are high-quality resources that are used at the low end, which is also a waste of resources in a sense.

[0005] Therefore, in order to solve the above problems, the present invention discloses a graphite tailings roadbed stabilization material and a preparation method thereof, and utilizes graphite tailings to develop a roadbed stabilization material with high performance, which provides a practical implementation path for the bulk disposal of graphite tailings and also has positive practical significance. Summary of the invention

[0006] The purpose of the invention is to provide a graphite tailings roadbed stabilizing material and a preparation method thereof, so as to fill the gap in the current technology.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A method for preparing a graphite tailings roadbed stabilization material comprises the following steps:

[0009] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, and adjust the size of the grading screen for screening;

[0010] (2) Raw material measurement: the inorganic binder is mixed according to a certain proportion, and the graphite tailings obtained in step (1) are placed in a stirring device, stirred evenly, and then water is added, and the mixture is stirred and mixed thoroughly to obtain a mixture;

[0011] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and after all the upper and lower pressure columns at both ends of the mold have entered the mold, maintaining the pressure for 2 to 4 minutes, applying reverse pressure to demould, and obtaining a roadbed stabilization material specimen;

[0012] (4) Static curing: The roadbed stabilization material specimens prepared in step (3) are placed in an indoor natural environment for static curing to obtain the graphite tailings roadbed stabilization material, and then the unconfined compressive strength is tested at 7d, 14d, 28d, 60d and 90d, respectively.

[0013] Preferably, the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Materials Stabilized by Inorganic Binders for Highway Engineering (JTGE51-2009).

[0014] Preferably, in step (1), the graphite tailings are solid waste generated during the mining and selection process of graphite deep processing enterprises, and the main mineral components are quartz and feldspar.

[0015] Preferably, in step (1), the graphite tailings pretreatment is performed by grinding and grading with a grinding device equipped with a grading device, and the passing rate of a 100-mesh sieve screened by adjusting the grading screen size is greater than 90%.

[0016] Preferably, in step (2), the inorganic binder is tertiary fly ash, carbide slag, water glass, lime, etc.

[0017] Preferably, in step (2), the ratio of the tertiary fly ash to carbide slag or water glass or lime in the inorganic binder is 0-1:0-8; the ratio of the inorganic binder mixed with the graphite tailings is 1-5:5-9.

[0018] Further preferably, in step (2), the ratio of the tertiary fly ash to carbide slag or water glass or lime in the inorganic binder is 1:2; 1:4; 1:6; 1:8; the ratio of the inorganic binder mixed in proportion with the graphite tailings is 1:9; 2:8; 3:7; 4:6; 5:5.

[0019] Preferably, in step (4), the temperature of the indoor natural environment is controlled to be 20-25° C., the relative humidity is controlled to be 60-80% of a normal pressure environment, and the static curing time is controlled to be 8-24 hours.

[0020] Preferably, in step (2), the mixing equipment is selected from one or more of a twin-shaft mixer, a planetary mixer, and a mortar mixer.

[0021] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] 1. The graphite tailings roadbed stabilization material prepared by the method of the present invention can achieve: the optimal moisture content is 16.8%, the maximum dry density is 1.70g / cm 3 , and its 90-day compressive strength reaches 8.51MPa. The roadbed material prepared by the present invention meets the development needs and provides a feasible path for the comprehensive utilization of graphite tailings;

[0023] 2. The present invention provides a suitable path for the reduction and resource processing of graphite tailings, improves the utilization rate of waste, greatly reduces carbon emissions, reduces environmental pollution, and has strong economy and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, some of the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be made based on these drawings without paying any creative work.

[0025] Figure 1 The roadbed stabilization material test piece in Example 1 of the present invention;

[0026] Figure 2 is an X-ray diffraction analysis diagram of the graphite tailings roadbed stabilization material in Example 1 of the present invention;

[0027] in, Figure 2 The horizontal axis represents degree and the vertical axis represents intensity. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, a specific implementation scheme is now described in detail.

[0029] The present invention is further described below in conjunction with the examples, but the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the different requirements of specific use, and the implementation conditions not indicated are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] See attached Figure 1 And attached Figure 2 This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0032] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0033] (2) Raw material measurement: tertiary fly ash and carbide slag are mixed in a ratio of 1:2, and then the graphite tailings obtained in step (1) are placed together in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and carbide slag to the graphite tailings is 4:6. After stirring evenly, water is added, and the mixture is stirred and mixed thoroughly to obtain a mixed material;

[0034] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0035] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0036] Example 2

[0037] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0038] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0039] (2) Raw material measurement: tertiary fly ash and carbide slag are mixed in a ratio of 1:4, and then the graphite tailings obtained in step (1) are placed together in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and carbide slag to the graphite tailings is 2:8. After stirring evenly, water is added, and the mixture is stirred and mixed thoroughly to obtain a mixture;

[0040] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0041] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0042] Example 3

[0043] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0044] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0045] (2) Raw material measurement: Mix the tertiary fly ash and lime in a ratio of 1:6, and then place the graphite tailings obtained in step (1) in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and lime to the graphite tailings is 2:8. After stirring evenly, add water, stir and mix thoroughly to obtain a mixture;

[0046] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0047] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0048] Example 4

[0049] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0050] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0051] (2) Raw material measurement: Mix the tertiary fly ash and water glass in a ratio of 1:4, and then place the graphite tailings obtained in step (1) in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and water glass to the graphite tailings is 2:8. After stirring evenly, add water, stir and mix thoroughly to obtain a mixture;

[0052] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0053] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0054] Example 5

[0055] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0056] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0057] (2) Raw material measurement: tertiary fly ash and carbide slag are mixed in a ratio of 1:8, and then the graphite tailings obtained in step (1) are placed together in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and carbide slag to the graphite tailings is 1:9, and after stirring evenly, water is added, and the mixture is stirred and mixed thoroughly to obtain a mixture;

[0058] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0059] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0060] Example 6

[0061] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0062] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0063] (2) Raw material measurement: tertiary fly ash and carbide slag are mixed in a ratio of 1:4, and then the graphite tailings obtained in step (1) are placed together in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and carbide slag to the graphite tailings is 5:5. After stirring evenly, water is added, and the mixture is stirred and mixed thoroughly to obtain a mixed material;

[0064] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0065] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0066] Example 7

[0067] This embodiment provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0068] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0069] (2) Raw material measurement: tertiary fly ash and carbide slag are mixed in a ratio of 1:4, and then the graphite tailings obtained in step (1) are placed in a double-shaft mixer, wherein the ratio of the mixture of the tertiary fly ash and carbide slag to the graphite tailings is 3:7. After stirring evenly, water is added, and the mixture is stirred and mixed thoroughly to obtain a mixture;

[0070] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0071] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0072] Comparative Example 1

[0073] This comparative example provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0074] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0075] (2) Raw material measurement: The third-grade fly ash and the graphite tailings obtained in step (1) are placed in a double-shaft mixer in a ratio of 4:6, stirred evenly, and then water is added and stirred thoroughly to obtain a mixture;

[0076] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0077] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0078] Comparative Example 2

[0079] This comparative example provides a graphite tailings roadbed stabilization material and a preparation method thereof, comprising the following steps:

[0080] (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, adjust the size of the grading screen to screen them, and the pass rate of 100 mesh screen is greater than 90%;

[0081] (2) Raw material measurement: Carbide slag and the graphite tailings obtained in step (1) are placed in a double-shaft mixer in a ratio of 4:6, stirred evenly, and then water is added and stirred thoroughly to obtain a mixture;

[0082] (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and waiting for the upper and lower pressure columns at both ends of the mold to enter the mold, maintaining the pressure for 2 minutes, and then applying reverse pressure to demould to obtain a roadbed stabilization material specimen;

[0083] (4) Static curing: The roadbed stabilization material specimen prepared in step (3) is placed in a normal pressure environment with a temperature of 22° C. and a relative humidity of 70% for static curing for 16 h to obtain a graphite tailings roadbed stabilization material, and then the unconfined compressive strength at 7d, 14d, 28d, 60d and 90d is tested in accordance with the Test Code for Inorganic Binder Stabilization Materials for Highway Engineering (JTGE51-2009).

[0084] The test results of the graphite tailings roadbed stabilization materials obtained in Examples 1 to 7 and Comparative Examples 1 to 2 are shown in Table 1.

[0085] Table 1

[0086]

[0087] It can be seen from Example 2 and Comparative Example 1 that, in the absence of added carbide slag, the main component of carbide slag is CaF2, which is alkaline and can provide an effective calcium source and alkaline conditions for the reaction system, promote the hydration reaction of calcium silicate, and improve the mechanical properties of the roadbed stabilization material.

[0088] It can be seen from Example 2 and Comparative Example 2 that the mechanical properties of the prepared roadbed stabilization material are slightly different from those of Example 2. This is because the reaction system lacks tertiary fly ash. Fly ash mainly provides effective silicon and promotes the formation of calcium silicate, while the silicon in the graphite tailings is difficult to react with the calcium in the carbide slag for hydration in a short period of time.

[0089] In summary, the graphite tailings roadbed stabilization material prepared by the method of the present invention can achieve: the optimal moisture content is 16.8%, the maximum dry density is 1.70g / cm 3, and its 90-day compressive strength reaches 8.51MPa. The roadbed material prepared by the present invention meets the development needs and provides a feasible path for the comprehensive utilization of graphite tailings; the present invention provides a suitable path for the reduction and resource treatment of graphite tailings, improves the utilization rate of waste, greatly reduces carbon emissions, reduces pollution to the environment, and has strong economy and practicality.

[0090] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for preparing a graphite tailings roadbed stabilizing material, characterized in that: The steps include: (1) Graphite tailings pretreatment: dehydrate and dry the graphite tailings, grind and classify them, and adjust the size of the grading screen for screening; (2) Raw material measurement: the inorganic binder is mixed according to a proportion, and the graphite tailings obtained in step (1) are placed together in a stirring device, stirred evenly, and then water is added, and the mixture is stirred and mixed thoroughly to obtain a mixture; (3) green body molding: placing the mixed material obtained in step (2) into a molding die, applying pressure to the molding die, and after all the upper and lower pressure columns at both ends of the mold have entered the mold, maintaining the pressure for 2 to 4 minutes, applying reverse pressure to demould, and obtaining a roadbed stabilization material specimen; (4) Static curing: The roadbed stabilization material specimens prepared in step (3) are placed in an indoor natural environment for static curing to obtain the graphite tailings roadbed stabilization material, and then the unconfined compressive strength is tested at 7d, 14d, 28d, 60d and 90d, respectively.

2. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (1), the graphite tailings are solid waste generated during the mining and selection process of graphite deep processing enterprises, and the main mineral components are quartz and feldspar.

3. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (1), the graphite tailings are pretreated by grinding and grading with a grinding device equipped with a grading device, and the passing rate of a 100-mesh sieve screen by adjusting the grading screen size is greater than 90%.

4. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (2), the inorganic binder is tertiary fly ash, carbide slag, water glass, lime, etc.

5. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (2), the ratio of the tertiary fly ash to carbide slag or water glass or lime in the inorganic binder is 0-1:0-8; the ratio of the inorganic binder mixed with the graphite tailings is 1-5:5-9.

6. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (4), the temperature of the indoor natural environment is controlled to be 20-25° C., the relative humidity is controlled to be 60-80% of a normal pressure environment, and the static curing time is controlled to be 8-24 hours.

7. The method for preparing a graphite tailings roadbed stabilizing material according to claim 1, characterized in that: In step (2), the mixing equipment is selected from one or more of a twin-shaft mixer, a planetary mixer, and a mortar mixer.

8. A graphite tailings roadbed stabilization material prepared by the method for preparing a graphite tailings roadbed stabilization material as claimed in any one of claims 1 to 7.

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