A soil stabilizing material and method of making same

Abstract

The present application belongs to the field of chemical industry, and particularly relates to a kind of soil stabilizing material and its preparation method.The soil stabilizing material provided by the present application comprises desulfurization ash, calcareous material, fly ash and water;wherein the weight fraction of desulfurization ash is calculated according to formula (I) and is between 10 and 35 parts by weight:P 脱 =A / S S Formula (I); the weight fraction of calcareous material is calculated according to formula (II):P 钙 =(B-P 脱 ×S Ca ) / C Ca Formula (II); the weight fraction of fly ash is calculated according to formula (III):P 粉 =100-P 脱 -P 钙 Formula (III); the moisture content of the soil stabilizing material is 20-40%.The soil stabilizing material provided by the present application uses bulk industrial solid waste as the main raw material, solving the problem of resource utilization of bulk industrial solid waste;at the same time, the fluctuation of desulfurization ash composition is considered in the formula design of the soil stabilizing material, thereby improving the performance stability of the product.

Description

Technical Field

[0001] This invention belongs to the field of chemical engineering, and in particular relates to a soil stabilizing material and its preparation method. Background Technology

[0002] In my country, flue gas desulfurization mainly employs wet, semi-dry, and dry desulfurization processes. Dry desulfurization combines desulfurization, dust removal, acid removal, and heavy metal removal in a synergistic manner, offering advantages such as superior environmental performance, high cost-effectiveness, intelligent operation, small footprint, no wastewater, and transparent chimney exhaust. It has been successfully applied to ultra-low emission treatment of flue gas in almost all industrial sectors, including thermal power, sintering and pelletizing, coking, carbon black production, catalytic cracking, glass kilns, cement, waste incineration, and industrial furnaces, demonstrating strong adaptability. Dry desulfurization ash is a byproduct of the dry desulfurization process. If disposed of as industrial solid waste through stockpiling, it not only occupies significant land resources but also pollutes the environment.

[0003] Regarding the resource utilization of desulfurization ash, existing technologies have reported technical solutions for preparing soil stabilizing materials by compounding desulfurization ash with other raw materials to achieve the resource utilization of desulfurization ash. However, these solutions do not take into account the fluctuation of desulfurization ash composition, and the given formulation range has poor operability, resulting in poor performance stability of the final product, which is difficult to meet market requirements. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a soil stabilizing material and its preparation method. The soil stabilizing material provided by the present invention uses bulk industrial solid waste such as desulfurization ash as the main raw material, which solves the problem of resource utilization of bulk industrial solid waste. Furthermore, the formulation design of the soil stabilizing material takes into account the fluctuation of the desulfurization ash composition, and the final product has good strength and performance stability.

[0005] This invention provides a soil stabilizing material, the components of which include: desulfurization ash, calcareous materials, fly ash and water;

[0006] The total weight of desulfurization ash, calcareous materials, and fly ash is 100 parts by weight. The weight of the desulfurization ash is calculated according to formula (I) and is between 10 and 35 parts by weight.

[0007] P 脱 =A / S S Formula (I);

[0008] In equation (I), P 脱 This indicates the weight percentage of desulfurization ash; A is a parameter, with a value between 3 and 8; S S This refers to the mass content of sulfur trioxide in desulfurization ash;

[0009] The weight fractions of the calcareous material are calculated according to formula (II):

[0010] P 钙 =(BP) 脱 ×S Ca ) / C Ca Equation (II);

[0011] In equation (II), P 钙 Indicates the weight percentage of calcareous material; B is a parameter, with a value between 25 and 45; S Ca Indicates the mass content of available calcium in desulfurization ash; C Ca Indicates the mass content of available calcium in calcareous materials;

[0012] The weight percentage of the fly ash is calculated according to formula (III):

[0013] P 粉 =100-P 脱 -P 钙 Equation (III);

[0014] In equation (III), P 粉 P indicates the weight parts of fly ash; 脱 P represents the weight parts of desulfurization ash; 钙 Indicates the weight parts of calcium-based materials;

[0015] The moisture content of the soil stabilizing material is 20-40%.

[0016] Preferably, the sulfur trioxide content in the desulfurization ash is 1-50% by mass; the effective calcium content in the desulfurization ash is 1-35% by mass; and the moisture content of the desulfurization ash is 0.2-2%.

[0017] Preferably, the desulfurization ash has a particle size of <1 mm and a median particle size D. 50 <50μm.

[0018] Preferably, the effective calcium content in the calcium material is 50-90% by mass; and the moisture content of the calcium material is 0-10%.

[0019] Preferably, the calcareous material is one or more of quicklime, hydrated lime, or carbide slag.

[0020] Preferably, the fly ash is grade I fly ash, grade II fly ash, or grade III fly ash.

[0021] This invention provides a method for preparing the soil stabilizing material described in the above technical solution, comprising the following steps:

[0022] Soil stabilizing material is obtained by mixing desulfurization ash, calcareous materials, fly ash and water.

[0023] Preferably, the soil stabilizing material is prepared in an intelligent preparation system, the intelligent preparation system comprising:

[0024] Storage units for storing each of the preparation raw materials separately;

[0025] Weighing unit used to weigh each of the preparation raw materials separately;

[0026] A detection unit for detecting the sulfur trioxide content, effective calcium content, and moisture content of desulfurization ash, as well as the effective calcium content and moisture content of calcareous materials.

[0027] Control unit used to control the amount of each raw material added during preparation;

[0028] A mixing unit used to mix the various raw materials used in the preparation.

[0029] Preferably, the mixing is carried out in a variable speed, multi-dimensional high-intensity shear mixer.

[0030] Preferably, the mixing time is 3 to 10 minutes.

[0031] Compared with existing technologies, this invention provides a soil stabilizing material and its preparation method. The soil stabilizing material provided by this invention comprises: desulfurization ash, calcareous materials, fly ash, and water; wherein, based on a total weight of 100 parts by weight of desulfurization ash, calcareous materials, and fly ash, the weight of the desulfurization ash is calculated according to formula (I) and is between 10 and 35 parts by weight: P 脱 =A / S S Equation (I); In Equation (I), P 脱 This indicates the weight percentage of desulfurization ash; A is a parameter, with a value between 3 and 8; S S The mass content of sulfur trioxide in the desulfurization ash; the weight parts of the calcareous material are calculated according to formula (II): P 钙 =(BP) 脱 ×S Ca ) / C Ca Equation (II); In Equation (II), P 钙 Indicates the weight percentage of calcareous material; B is a parameter, with a value between 25 and 45; S Ca Indicates the mass content of available calcium in desulfurization ash; C Ca This indicates the mass content of available calcium in the calcareous material; the weight parts of the fly ash are calculated according to formula (III): P 粉 =100-P 脱 -P 钙 Equation (III); In Equation (III), P 粉 P indicates the weight parts of fly ash; 脱 P represents the weight parts of desulfurization ash; 钙The weight percentage of the calcareous material is indicated; the moisture content of the soil stabilizing material is 20-40%. This invention uses desulfurization ash as the main raw material, supplemented with calcareous materials and fly ash in a predetermined proportion, to obtain a soil stabilizing material with high strength and good stability. The soil stabilizing material provided by this invention uses bulk industrial solid waste as the main raw material, solving the problem of resource utilization of bulk industrial solid waste; simultaneously, the formulation design of this soil stabilizing material takes into account the fluctuation of desulfurization ash composition, thereby improving the performance stability of the product. Furthermore, in the preferred technical solution provided by this invention, the soil stabilizing material can be prepared using an intelligent preparation system, improving the automation level of soil stabilizing material preparation. Additionally, in the preferred technical solution provided by this invention, a variable-speed multi-dimensional high-strength shear mixer can also be used for raw material mixing, improving the mixing uniformity of the raw materials and enhancing product performance. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a soil stabilizing material, the components of which include: desulfurization ash, calcareous materials, fly ash and water;

[0034] The total weight of desulfurization ash, calcareous materials, and fly ash is 100 parts by weight. The weight of the desulfurization ash is calculated according to formula (I) and is between 10 and 35 parts by weight.

[0035] P 脱 =A / S S Formula (I);

[0036] In equation (I), P 脱 This indicates the weight percentage of desulfurization ash; A is a parameter, with a value between 3 and 8; S S This refers to the mass content of sulfur trioxide in desulfurization ash;

[0037] The weight fractions of the calcareous material are calculated according to formula (II):

[0038] P 钙 =(BP) 脱 ×S Ca ) / C Ca Equation (II);

[0039] In equation (II), P 钙 Indicates the weight percentage of calcareous material; B is a parameter, with a value between 25 and 45; S CaIndicates the mass content of available calcium in desulfurization ash; C Ca Indicates the mass content of available calcium in calcareous materials;

[0040] The weight percentage of the fly ash is calculated according to formula (III):

[0041] P 粉 =100-P 脱 -P 钙 Equation (III);

[0042] In equation (III), P 粉 P indicates the weight parts of fly ash; 脱 P represents the weight parts of desulfurization ash; 钙 This indicates the weight parts of the calcium-based material.

[0043] In the soil stabilizing material provided by this invention, the source of the desulfurization ash is not particularly limited, and it can originate from dry / semi-dry desulfurization devices such as circulating fluidized bed dry desulfurization (CFB), rotary spray drying (SDA), novel integrated desulfurization (NID), and pipeline injection (DSI); the particle size of the desulfurization ash is preferably <1 mm; the median particle size D of the desulfurization ash is... 50 Preferably <50μm; the mass content of sulfur trioxide (S) in the desulfurization ash S The effective calcium content (S) in the desulfurization ash is preferably 1-50%, more preferably 10-30%, specifically 10.59%, 16.91%, or 26.66%; Ca The moisture content (S) of the desulfurization ash is preferably 1-35%, more preferably 5-18%, specifically 6.39%, 12.1%, or 15.67%; w The preferred concentration is 0.2% to 2%, more preferably 0.2% to 1%, specifically 0.4%, 0.88%, or 0.95%, wherein the S w It refers to the ratio of the weight of moisture in desulfurization ash to the total weight of desulfurization ash.

[0044] In the embodiments provided by the present invention, based on a total of 100 parts by weight of desulfurization ash, calcareous materials and fly ash, the amount of desulfurization ash used can be 15 parts by weight, 20 parts by weight or 30 parts by weight.

[0045] In the soil stabilizing material provided by the present invention, the calcareous material is preferably one or more of quicklime, hydrated lime, or carbide slag; the particle size of the calcareous material is preferably 1–150 μm, more preferably 3–105 μm; the median particle size of the calcareous material is preferably 20–30 μm, more preferably 25 μm; the mass content of available calcium in the calcareous material (C) is... CaThe water content (C) of the calcareous material is preferably 50-90%, more preferably 60-70%, and specifically 67.99%; w The preferred concentration is 0-10%, more preferably 0.5-1%, and specifically 0.8%. w It refers to the ratio of the weight of water in calcareous materials to the total weight of the calcareous materials.

[0046] In the embodiments provided by the present invention, based on a total of 100 parts by weight of desulfurization ash, calcareous material and fly ash, the amount of calcareous material may be 35 parts by weight or 40 parts by weight.

[0047] In the soil stabilizing material provided by the present invention, the fly ash is preferably grade I fly ash, grade II fly ash, or grade III fly ash, and more preferably grade III fly ash.

[0048] In the embodiments provided by the present invention, based on a total of 100 parts by weight of desulfurization ash, calcareous materials and fly ash, the amount of fly ash used can be 30 parts by weight or 45 parts by weight.

[0049] In the soil stabilizing material provided by this invention, the moisture content of the soil stabilizing material is preferably 20-40%, more preferably 20-30%, and specifically may be 22%, 24%, or 26%. The moisture content refers to the ratio of the weight of water in the soil stabilizing material to the dry weight of the soil stabilizing material. In this invention, the moisture content of the soil stabilizing material is controlled by adjusting the amount of external water used.

[0050] The present invention also provides a method for preparing the soil stabilizing material described in the above technical solution, comprising the following steps:

[0051] Soil stabilizing material is obtained by mixing desulfurization ash, calcareous materials, fly ash and water.

[0052] In the preparation method provided by the present invention, the preparation of the soil stabilizing material is preferably carried out in an intelligent preparation system, which includes: a storage unit for storing each preparation raw material separately; a weighing unit for weighing each preparation raw material separately; a detection unit for detecting the sulfur trioxide content, effective calcium content, and moisture content of the desulfurization ash, the effective calcium content, and the moisture content of the calcareous material; a control unit for controlling the amount of each preparation raw material added; and a mixing unit for mixing each preparation raw material.

[0053] In the preparation method provided by this invention, the mixing is preferably carried out in a variable speed multidimensional high-intensity shear mixer; the variable speed multidimensional high-intensity shear mixer includes a barrel that rotates counterclockwise, the rotation speed is calculated according to the diameter of the barrel, and the rotation speed is preferably 10-30 r / min, specifically 10 r / min, 12 r / min, 15 r / min, 17 r / min, 20 r / min, 23 r / min, 25 r / min, 27 r / min or 30 r / min; the stirring shaft is designed to rotate clockwise with a variable speed, and the rotation speed is preferably 300-2000 r / min, specifically 300 r / min, 500 r / min, 700 r / min, 1000 r / min, 1200 r / min, 1500 r / min, 1700 r / min or 2000 r / min; the mixing time is preferably 3-10 min, specifically 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min or 10 min.

[0054] This invention uses desulfurization ash as the main raw material, supplemented with calcium-based materials and fly ash in a predetermined proportion, to obtain a soil stabilizing material with high strength and good stability, exhibiting significant environmental and economic benefits. More specifically, the technical solution provided by this invention has the following advantages:

[0055] 1) The main components of desulfurization ash are calcium sulfite, calcium sulfate, calcium hydroxide, fly ash, etc., which are all effective components of soil stabilization materials and are ideal raw materials for preparing soil stabilization materials;

[0056] 2) The desulfurization ash has a fine particle size, with a median particle size usually less than 50μm, which saves grinding energy consumption;

[0057] 3) Considering the fluctuation of desulfurization ash composition, fly ash and calcareous materials are added, and the addition ratio is calculated through appropriate formula control to ensure the stable and excellent performance of soil stabilizing materials.

[0058] 4) The main raw materials are bulk industrial solid waste such as desulfurization ash, which are inexpensive and can reduce construction costs. At the same time, it also solves the problem of disposal of bulk industrial solid waste.

[0059] 5) It is preferable to use an intelligent preparation system to prepare the soil stabilizing material, thereby improving the level of automation in the preparation of the soil stabilizing material;

[0060] 6) It is preferable to use a variable speed multidimensional high-intensity shear mixer to mix the raw materials during the preparation process. This mixing equipment can make the raw materials more fully mixed, increase the internal energy of the reaction system, produce local microscopic changes in the powder structure, and enhance the reactivity between solid particles.

[0061] For clarity, the following examples and comparative models will be used to provide a detailed description.

[0062] Example 1

[0063] (1) Desulfurization ash sample #1, in which S W 0.95%, S S It was 10.59%, S Ca The content of desulfurization ash was 6.39%, with a particle size <1 mm and a median particle size D50 <50 μm; the weight percentage of desulfurization ash added (P) 脱 According to P 脱 =A / S S The calculations were performed with parameter A taking boundary values ​​of 3 and 8, and P was obtained. 脱 The content is 28.33–75.54 parts by weight; at the same time, it must meet the requirements of P. 脱 Between 10 and 35 parts by weight; finally, take P. 脱 It is 30 parts by weight.

[0064] (2) The calcium-based material selected is carbide slag, of which C W 0.8%, C Ca The content of calcium carbide slag was 67.99%, the particle size was 3-105 μm, and the median particle size was 25 μm; the weight parts of calcium carbide slag added (P) 电 According to P 电 =(BP) 脱 ×S Ca ) / C Ca With parameter B taking boundary values ​​of 25 and 45 respectively, P was calculated. 电 The content ranged from 33.95 to 63.37 parts by weight; the final amount of P was taken. 电 It is 40 parts by weight.

[0065] (3) Select grade III fly ash, and the weight percentage of fly ash added (P) 粉 According to P 粉 =100-P 脱 -P 钙 Calculate P 粉 It is 30 parts by weight.

[0066] (4) Mix 30 parts by weight of desulfurization ash sample #1, 40 parts by weight of carbide slag, and 30 parts by weight of fly ash evenly. Determine the optimum moisture content as 26% and the maximum dry density as 1.57 g / cm³ using the compaction test in the "JTG 3430 Highway Geotechnical Test Procedure". 3 .

[0067] (5) Mix 30 parts by weight of desulfurization ash No. 1 sample, 40 parts by weight of carbide slag, 30 parts by weight of fly ash and water evenly. The amount of water used is to achieve the optimal moisture content. The mixing equipment is a variable speed multi-dimensional high-strength shear mixer. The counterclockwise rotation speed of the material cylinder is 20 r / min, the clockwise rotation speed of the mixing shaft is 1000 r / min, and the mixing time is 4 min to obtain a geotechnical engineering sample. After curing the sample for 7 days, the unconfined compressive strength is tested and found to be 1.79 MPa, which meets the requirements of JTGT F20-2015 "Technical Specifications for Construction of Highway Pavement Base".

[0068] Example 2

[0069] (1) Desulfurization ash sample #2, in which S W It is 0.88%, S S For 16.91%, S Ca The content of desulfurization ash by weight is 15.67%, particle size <1mm, and median particle size D50 <50μm; 脱 According to P 脱 =A / S S The calculations were performed with parameter A taking boundary values ​​of 3 and 8, and P was obtained. 脱 The content is 17.74 to 49.31 parts by weight; at the same time, it must meet the requirements of P. 脱 Between 10 and 35 parts by weight; finally, take P. 脱 It is 20 parts by weight.

[0070] (2) The calcium-based material selected is carbide slag, of which C W 0.8%, C Ca The content of calcium carbide slag was 67.99%, the particle size was 3-105 μm, and the median particle size was 25 μm; the weight parts of calcium carbide slag added (P) 电 According to P 电 =(BP) 脱 ×S Ca ) / C Ca With parameter B taking boundary values ​​of 25 and 45 respectively, P was calculated. 电 The content ranged from 32.16 to 61.58 parts by weight; the final amount of P was taken. 电 It is 35 parts by weight.

[0071] (3) Select grade III fly ash, and the weight percentage of fly ash added (P) 粉 According to P 粉 =100-P 脱 -P 钙 Calculate P 粉 It is 45 parts by weight.

[0072] (4) Mix 20 parts by weight of desulfurization ash sample #2, 35 parts by weight of carbide slag, and 45 parts by weight of fly ash evenly. Determine the optimum moisture content as 22% and the maximum dry density as 1.54 g / cm³ using the compaction test in the "JTG 3430 Highway Geotechnical Test Procedure". 3 .

[0073] (5) Mix 20 parts by weight of desulfurized ash No. 2, 35 parts by weight of carbide slag, 45 parts by weight of fly ash and water evenly. The amount of water used is to achieve the optimal moisture content. The mixing equipment is a variable speed multi-dimensional high-strength shear mixer. The counterclockwise rotation speed of the material cylinder is 20 r / min, the clockwise rotation speed of the mixing shaft is 1000 r / min, and the mixing time is 4 min to obtain a geotechnical engineering sample. After curing the sample for 7 days, the unconfined compressive strength is tested and found to be 2.15 MPa, which meets the requirements of JTGT F20-2015 "Technical Specifications for Construction of Highway Pavement Base".

[0074] Example 3

[0075] (1) Desulfurization ash sample #3, of which S W 0.40%, S S For 26.66%, S Ca The content of desulfurization ash is 12.10%, with a particle size <1 mm and a median particle size D50 <50 μm; the weight percentage of desulfurization ash added (P) 脱 According to P 脱 =A / S S The calculations were performed with parameter A taking boundary values ​​of 3 and 8, and P was obtained. 脱 The content is 11.25 to 30.01 parts by weight; at the same time, it must meet the requirements of P. 脱 Between 10 and 35 parts by weight; finally, take P. 脱 It is 15 parts by weight.

[0076] (2) The calcium-based material selected is carbide slag, of which C W 0.8%, C Ca The content of calcium carbide slag was 67.99%, the particle size was 3-105 μm, and the median particle size was 25 μm; the weight parts of calcium carbide slag added (P) 电 According to P 电 =(BP) 脱 ×S Ca ) / C Ca With parameter B taking boundary values ​​of 25 and 45 respectively, P was calculated. 电 The content is 34.10–63.52 parts by weight; the final amount of P is taken. 电 It is 40 parts by weight.

[0077] (3) Select grade III fly ash, and the weight percentage of fly ash added (P) 粉 According to P 粉 =100-P脱 -P 钙 Calculate P 粉 It is 45 parts by weight.

[0078] (4) Mix 15 parts by weight of desulfurization ash sample #3, 40 parts by weight of carbide slag, and 45 parts by weight of fly ash evenly. Determine the optimum moisture content (24%) and maximum dry density (1.49 g / cm³) using the compaction test in JTG 3430 Highway Geotechnical Test Procedure. 3 .

[0079] (5) Mix 15 parts by weight of desulfurization ash No. 3 sample, 40 parts by weight of carbide slag, 45 parts by weight of fly ash and water evenly. The amount of water used is to achieve the optimal moisture content. The mixing equipment is a variable speed multi-dimensional high-strength shear mixer. The counterclockwise rotation speed of the material cylinder is 20 r / min, the clockwise rotation speed of the mixing shaft is 1000 r / min, and the mixing time is 4 min to obtain a geotechnical engineering sample. After curing the sample for 7 days, the unconfined compressive strength is tested and found to be 2.08 MPa, which meets the requirements of JTGT F20-2015 "Technical Specifications for Construction of Highway Pavement Base".

[0080] Comparative Example 1

[0081] (1) Mix the two raw materials evenly according to the following ratio: 30 parts by weight of lime and 70 parts by weight of grade III fly ash. Determine the optimum moisture content as 26% and the maximum dry density as 1.37 g / cm³ using the compaction test in the "JTG3430 Highway Geotechnical Test Procedure". 3 .

[0082] (2) Mix 30 parts by weight of lime, 70 parts by weight of grade III fly ash and water evenly. The amount of water used is to achieve the optimal moisture content. The mixing equipment is a variable speed multi-dimensional high-strength shear mixer. The counterclockwise rotation speed of the material cylinder is 20 r / min, the clockwise rotation speed of the mixing shaft is 1000 r / min, and the mixing time is 4 min. A geotechnical engineering sample is obtained. After curing the sample for 7 days, the unconfined compressive strength is tested and found to be 1.29 MPa, which meets the requirements of JTGT F20-2015 "Technical Specifications for Construction of Highway Pavement Base".

[0083] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A soil stabilizing material, comprising: Desulfurization ash, calcareous materials, fly ash, and water; The total weight of desulfurization ash, calcareous materials, and fly ash is 100 parts by weight. The weight of the desulfurization ash is calculated according to formula (I) and is between 10 and 35 parts by weight. P 脱 =A / S S Formula (I); In equation (I), P 脱 This indicates the weight percentage of desulfurization ash; A is a parameter, with a value between 3 and 8; S S This refers to the mass content of sulfur trioxide in desulfurization ash; The weight fractions of the calcareous material are calculated according to formula (II): P 钙 =(BP 脱 ×S Ca ) / C Ca Formula (II); In equation (II), P 钙 Indicates the weight percentage of calcareous material; B is a parameter, with a value between 25 and 45; S Ca Indicates the mass content of available calcium in desulfurization ash; C Ca Indicates the mass content of available calcium in calcareous materials; The weight percentage of the fly ash is calculated according to formula (III): P 粉 =100-P 脱 -P 钙 Formula (III); In equation (III), P 粉 P indicates the weight parts of fly ash; 脱 P represents the weight parts of desulfurization ash; 钙 Indicates the weight parts of calcium-based materials; The moisture content of the soil stabilizing material is 20-40%; The desulfurization ash contains 1-50% sulfur trioxide by mass; 1-35% available calcium by mass; 0.2-2% moisture content; and has a particle size <1mm and a median particle size D. 50 <50μm; The calcareous material is one or more of quicklime, hydrated lime, or carbide slag; the effective calcium content in the calcareous material is 50-90% by mass; and the moisture content of the calcareous material is 0-10%. The fly ash is grade I fly ash, grade II fly ash, or grade III fly ash.

2. A method for preparing the soil stabilizing material according to claim 1, comprising the following steps: Soil stabilizing material is obtained by mixing desulfurization ash, calcareous materials, fly ash and water.

3. The preparation method according to claim 2, characterized in that, The soil stabilizing material is prepared in an intelligent preparation system, which includes: Storage units for storing each of the preparation raw materials separately; Weighing unit used to weigh each of the preparation raw materials separately; A detection unit for detecting the sulfur trioxide content, effective calcium content, and moisture content of desulfurization ash, as well as the effective calcium content and moisture content of calcareous materials. Control unit used to control the amount of each raw material added during preparation; A mixing unit used to mix the various raw materials used in the preparation.

4. The preparation method according to claim 2, characterized in that, The mixing is carried out in a variable speed, multi-dimensional high-intensity shear mixer.

5. The preparation method according to claim 2, characterized in that, The mixing time is 3 to 10 minutes.