High belite cement clinker prepared from drilling cuttings and preparation method of high belite cement clinker

Abstract

The invention discloses a high belite cement clinker prepared from drilling cuttings and a preparation method of the high belite cement clinker, and belongs to the technical field of materials. The cement clinker comprises the following raw materials in parts by weight: 61-72 parts of a calcium material, 25-35 parts of drilling cuttings and 2.4-4 parts of an iron material. The preparation method comprises the following steps: S1, drying the drilling cuttings, and grinding; s2, uniformly mixing the raw materials in proportion to obtain powder; s3, calcining; firstly, the temperature is increased to 900-950 DEG C, and the constant temperature is kept for 30-40 min And heating to 1300-1400 DEG C, keeping the temperature for 30-60 minutes, quickly taking out, quenching to normal temperature, and grinding to obtain the high belite clinker. The invention also discloses the high belite cement clinker prepared by the method. According to the invention, the C2S crystal form with high hydration activity can be stabilized, the later strength of the clinker is improved, and secondary pollution of drilling rocks is prevented; the technical problems that in the prior art, the mixing amount of the drilling rock debris is low, the later strength of the clinker is low, and the promoting rate is low generally existing in preparation of the cement clinker from the rock debris are solved.

Description

Technical Field

[0001] The invention belongs to the field of material technology, and particularly relates to high-belite cement clinker prepared by utilizing drilling cuttings and a preparation method thereof. Background Art

[0002] Drilling cuttings are a mixture of waste cuttings and waste drilling fluids generated during oil and gas extraction. They are divided into water-based cuttings and oil-based cuttings. Among them, oil-based cuttings are hazardous wastes. Usually, each well produces about 250 to 360 m 3 Oil-based cuttings, based on the oil-based cuttings produced in a single well, take 305m 3 It is estimated that my country's annual production of oil-based drill cuttings is as high as 6.18 million m 3 Currently, most rock cuttings undergo simple pre-treatment to remove oil and are then temporarily stored in storage pools, awaiting further processing. However, rock cuttings contain polycyclic aromatic hydrocarbons and heavy metal ions. Long-term storage or improper disposal poses a serious threat to the ecological environment and the health of residents, necessitating an urgent resource recovery approach.

[0003] High-belite cement clinker, a type of clinker with C2S as the dominant mineral, offers significant advantages, including low limestone demand, correspondingly low CO2 emissions, a low early hydration temperature rise, and a high rate of later strength gain. However, during the cooling process, the crystal form of the dominant C2S mineral, C2S, readily transforms into the hydration-inactive γ-form. Numerous studies have shown that rapid cooling can maintain high activity in the belite phase, allowing the C2S mineral to exist in the α or β crystal forms, which exhibit high activity and promote later strength development. However, this method requires complex preparation processes, making it impractical for large-scale production. Other studies have attempted to inhibit C2S crystal transformation by adding costly crystal stabilizers, but this method is prohibitively expensive, hindering widespread industrial application.

[0004] In recent years, researchers have attempted to use drilling cuttings to produce cement clinker, but they generally face two major challenges: low cuttings content; and insufficient clinker performance, resulting in suboptimal final strength and strength growth, making it difficult to meet engineering requirements. Therefore, providing a high-belite cement clinker produced from drilling cuttings, with a high cuttings content and high final strength, has become a pressing issue for those skilled in the art. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a method for preparing high-belite cement clinker using drilling cuttings, which utilizes the fact that drilling cuttings contain a small amount of BaO to obtain BaO by low-temperature calcination. 2+Solid solution into dicalcium silicate crystals can stabilize the highly hydration-active C2S crystal form and improve the later strength of the clinker; the heavy metal ions in the cuttings are also solidified in the form of solid solution during the calcination process to prevent secondary pollution; this overcomes the technical problems commonly found in the prior art of preparing cement clinker from cuttings, such as low drilling cuttings content, low later strength of the clinker and low growth rate.

[0006] The second object of the present invention is to provide high-belite cement clinker prepared by the method.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] The first aspect of the present invention discloses a method for preparing high-belite cement clinker using drilling cuttings. The raw materials of the cement clinker include the following substances in parts by weight: 61-72 parts of calcareous material, 25-35 parts of drilling cuttings, and 2.4-4 parts of ferrous material. The preparation method comprises the following steps:

[0009] S1. Drilling cuttings are dried and ground;

[0010] S2. The raw materials are mixed uniformly according to the ratio to obtain a powder;

[0011] S3. Calcination; first, heating to 900-950°C at a rate of 10-12°C / min and holding at that temperature for 30-40min; then heating to 1300-1400°C at a rate of 20-25°C / min and holding at that temperature for 30-60min, rapidly cooling to room temperature, and grinding to obtain high-belite clinker.

[0012] In some embodiments of the present invention, the cement clinker raw materials include the following substances in parts by weight: 61-69.5 parts of calcareous materials, 28-35 parts of drilling cuttings, and 2.5-4 parts of ferrous materials.

[0013] In some embodiments of the present invention, the calcareous raw material includes at least one of limestone, carbide slag, and white mud.

[0014] In some embodiments of the present invention, the ferrous material includes at least one of sulfate slag, red mud, iron tailings, and copper slag.

[0015] In some embodiments of the present invention, in step S1, the drilling cuttings are dried to constant weight and placed in a ball mill. In some embodiments of the present invention, the iron raw material and the calcium raw material are passed through a 200-mesh sieve and then mixed with the drilling cuttings powder.

[0016] In some embodiments of the present invention, in step S3, 8-12% of water by weight of the raw material powder is added and mixed evenly, and then pressed into a corrugated raw material cake under a pressure of 10.0-15.0 MPa, dried, and then calcined;

[0017] Preferably, the size of the corrugated raw material cake is Wave-shaped raw material cake;

[0018] Preferably, the raw cake is placed in an oven at 105° C. and dried to constant weight.

[0019] In laboratory research, the raw material is generally pressed into cakes for easy calcination; in large-scale production, there is no need for pressing and it can be calcined directly.

[0020] In some embodiments of the present invention, in step S3, the powder is ground to a Blaine surface area of ​​350±10m 2 / kg.

[0021] The second aspect of the present invention discloses a high-belite cement clinker, which is prepared by the above method.

[0022] In an embodiment of the present invention, the total amount of β-type and α-type C2S is 61-72%.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention is scientifically designed and ingeniously conceived. It uses drilling cuttings as the main raw material for high-belite cement clinker, which not only saves costs and reduces the use of raw materials such as limestone and sandstone, but also improves the resource utilization rate of cuttings, which is of great significance to my country's sustainable economic development and environmental protection.

[0025] In the present invention, the drill cuttings contain a small amount of barium oxide (BaO), so there is no need to add expensive crystal stabilizers during the firing process. 2+ It dissolves into dicalcium silicate (C2S) crystals, thereby changing the lattice parameters of C2S. This change further triggers specific twin morphologies, surface undulations, and grain boundary deformations. These structural changes help stabilize the highly hydrating C2S crystal form (mainly the β-form) and can maintain some C2S in the highly hydrating α-form. The high-belite cement clinker prepared by the present invention has a fine grain size, wherein the total amount of β- and α-form C2S is 61%-72%, and the content of active C2S minerals is relatively high.

[0026] The high-belite cement clinker produced by the present method exhibits excellent burnability and an extremely low f-CaO content, generally ≤1.2%. The method utilizes a calcination temperature of 1300°C to 1400°C. This relatively low calcination temperature significantly reduces energy consumption and carbon emissions, lowering coal consumption and carbon emissions. Furthermore, low-temperature calcination facilitates the formation of active minerals in the clinker, characterized by fine crystals and high levels of defects.

[0027] The 28-day compressive strength of a cement mortar test block prepared by adding 5% dihydrate gypsum to the cement clinker prepared by the present invention is ≥52 MPa. The clinker has the advantages of low hydration heat, high late strength growth rate and high late strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attachment Figure 1 is a process flow chart of the present invention;

[0029] Attachment Figure 2 This is the XRD pattern of the high-belite cement clinker of Example 1;

[0030] Attachment Figure 3 This is the XRD pattern of the high-belite cement clinker of Example 2;

[0031] Attachment Figure 4 This is the XRD pattern of the high-belite cement clinker of Example 3;

[0032] Attachment Figure 5 This is the XRD pattern of the high-belite cement clinker of Example 4;

[0033] Attachment Figure 6 This is the XRD pattern of the high-belite cement clinker of Example 5;

[0034] Attachment Figure 7 This is the XRD pattern of the high-belite cement clinker of Example 6. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0036] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any intermediate value within a stated value or stated range and any other stated value or intermediate value within the stated range is also encompassed by the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0037] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0038] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the present invention. The present description and examples are intended to be illustrative only.

[0039] The words “include,” “including,” “have,” “contain,” etc. described in the present invention are all open terms, meaning including but not limited to.

[0040] Unless otherwise specified, the "parts" described in the embodiments of the present invention refer to parts by mass.

[0041] Example 1

[0042] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0043] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0044] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 69.5 parts of limestone, 2.5 parts of sulfuric acid slag, and 28 parts of drilling cuttings; and then stirred to form a uniform powder.

[0045] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0046] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 950℃ at 10℃ / min and keep it warm for 30min. Then, heat it to the target calcination temperature of 1320℃ at 20℃ / min and keep it warm for 60min. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​355.42m 2 / kg. The high-belite cement clinker is obtained.

[0047] The main mineral phase composition of clinker is C2S: 67.49%; C3S: 10.99%; C4AF: 8.39%; C3A: 4.93%. Figure 2 shown.

[0048] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0049] Example 2

[0050] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0051] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0052] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 69.5 parts of limestone, 2.5 parts of sulfuric acid slag, and 28 parts of drilling cuttings; and then stirred to form a uniform powder.

[0053] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0054] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 950°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1380°C at 25°C / min and keep it warm for 60 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​350.17 m 2 / kg. The high-belite cement clinker is obtained.

[0055] The main mineral phase composition of clinker is C2S: 64.37%; C3S: 11.15%; C4AF: 5.07%; C3A: 4.49%. Figure 3 shown.

[0056] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0057] Example 3

[0058] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0059] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0060] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 67 parts of limestone, 3 parts of sulfuric acid slag, and 30 parts of drilling cuttings; and then stirred to form a uniform powder.

[0061] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0062] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 950℃ at 10℃ / min and keep it warm for 30min. Then, heat it to the target calcination temperature of 1380℃ at 25℃ / min and keep it warm for 30min. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​354.28m 2 / kg. The high-belite cement clinker is obtained.

[0063] The main mineral phase composition of clinker is C2S: 70.17%; C3S: 4.62%; C4AF: 11.32%; C3A: 4.64%. Figure 4 shown.

[0064] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0065] Example 4

[0066] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0067] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0068] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 61 parts of limestone, 4 parts of sulfuric acid slag, and 35 parts of drilling cuttings; and then stirred to form a uniform powder.

[0069] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0070] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 900°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1380°C at 20°C / min and keep it warm for 30 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​351.92 m 2 / kg. The high-belite cement clinker is obtained.

[0071] The main mineral phase composition of clinker is C2S: 71.71%; C3S: 7.16%; C4AF: 3.89%; C3A: 7.15%. Figure 5 shown.

[0072] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0073] Example 5

[0074] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0075] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0076] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 61 parts of limestone, 4 parts of sulfuric acid slag, and 35 parts of drilling cuttings; and then stirred to form a uniform powder.

[0077] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0078] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 900°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1320°C at 20°C / min and keep it warm for 30 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​356.61m 2 / kg. The high-belite cement clinker is obtained.

[0079] The main mineral phase composition of clinker is C2S: 73.61%; C3S: 6.56%; C4AF: 2.55%; C3A: 6.35%. Figure 6 shown.

[0080] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0081] Example 6

[0082] This embodiment discloses a method for preparing high-belite cement clinker of the present invention, comprising the following steps:

[0083] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0084] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 61 parts of limestone, 4 parts of sulfuric acid slag, and 35 parts of drilling cuttings; and then stirred to form a uniform powder.

[0085] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0086] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 900°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1400°C at 20°C / min and keep it warm for 30 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​352.17 m 2 / kg. The high-belite cement clinker is obtained.

[0087] The main mineral phase composition of clinker is C2S: 64.26%; C3S: 7.79%; C4AF: 2.51%; C3A: 3.97%. Figure 7 shown.

[0088] 5% natural gypsum was added to the cement clinker of this example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 1.

[0089] The physical property test results of Examples 1 to 6 are shown in Table 1, the batching scheme and calcination system are shown in Table 2, and the clinker mineral composition is shown in Table 3.

[0090] Table 1 Physical property test results of Examples 1 to 6

[0091]

[0092] It can be seen from Table 1 that the high-belite cement clinker prepared according to the implementation steps of the present invention has high late strength and a large growth rate.

[0093] Table 2 Ingredients and calcination system of Examples 1 to 6

[0094]

[0095] Table 3 Clinker mineral composition of Examples 1 to 6

[0096]

[0097] As shown in Table 3, the high-belite cement clinker prepared according to the implementation steps of the present invention has an overall C2S content of 64%-73%, of which the total amount of active crystal forms (β-type and α-type) is 61%-72%, and has a low free calcium content (<1.2%).

[0098] Comparative Example 1

[0099] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0100] (2) The raw materials processed in step (1) are mixed according to the following weight ratio: 61 parts of limestone, 4 parts of sulfuric acid slag, and 35 parts of drilling cuttings; and then stirred to form a uniform powder.

[0101] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0102] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 900°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1450°C at 20°C / min and keep it warm for 60 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​350.76 m 2 / kg.

[0103] The main mineral phase composition of clinker is C2S: 55.23%; C3S: 16.67%; C4AF: 5.67%; C3A: 4.05%.

[0104] 5% natural gypsum was added to the cement clinker of this comparative example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 4.

[0105] Comparative Example 2

[0106] (1) Drilling cuttings were dried to constant weight, ground in a ball mill, and the particle size was controlled to 10% ± 2% of the residue on an 80 μm square sieve, and set aside; the iron raw material, sulfuric acid slag, and the calcium raw material, limestone, were sieved through a 200-mesh sieve, and set aside;

[0107] (2) The raw materials treated in step (1) are mixed according to the following weight ratio: 91 parts of limestone, 4 parts of sulfuric acid slag, and 5 parts of drilling cuttings; and then stirred to form a uniform powder.

[0108] (3) Add 10 wt% of water to the powder, mix, and press under a pressure of 12.5 MPa to form The raw material cake was dried in an oven at 105°C to constant weight.

[0109] (4) Place the dried raw material sample in a crucible and place it in a high-temperature furnace. First, heat it to 900°C at 10°C / min and keep it warm for 30 minutes. Then, heat it to the target calcination temperature of 1380°C at 20°C / min and keep it warm for 30 minutes. Then quickly remove the test cake and cool it to room temperature. Grind the cooled clinker to a Blaine surface area of ​​358.16 m 2 / kg.

[0110] The main mineral phase composition of clinker is C2S: 35.24%; C3S: 32.17%; C4AF: 7.66%; C3A: 4.43%.

[0111] 5% natural gypsum was added to the cement clinker of this comparative example to prepare cement mortar test blocks, and the physical properties were tested according to GB 175-2023: General Portland Cement. The results are shown in Table 4.

[0112] Table 4 Physical property test results of Comparative Examples 1 and 2

[0113]

[0114] Comparing Examples 4, 5, and 6 with Comparative Example 1, Comparative Example 1 adopts a higher temperature calcination, its C2S content decreases, and its later strength is low, and the strength increase and decrease rate is reduced.

[0115] Comparing Examples 2, 3, and 4 with Comparative Example 1, Comparative Example 1 uses a lower ratio of rock chips for calcination, its C2S content decreases, and the later strength is low, and the strength increase / decrease rate decreases.

[0116] It should be noted that the above examples are merely illustrative of the technical principles and features of the present invention. Their purpose is to enable others to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. Any equivalent changes or improvements based on the essence of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing high-belite cement clinker using drilling cuttings, characterized in that: The raw materials include the following materials in parts by weight: 61-72 parts of calcareous material, 25-35 parts of drilling cuttings, and 2.4-4 parts of iron material. The preparation method includes the following steps: S1. Drilling cuttings are dried and ground; S2. The raw materials are mixed uniformly according to the ratio to obtain a powder; S3. Calcination; first, heating to 900-950°C at a rate of 10-12°C / min and holding at that temperature for 30-40min; then heating to 1300-1400°C at a rate of 20-25°C / min and holding at that temperature for 30-60min, rapidly cooling to room temperature, and grinding to obtain high-belite clinker.

2. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1, wherein: The raw materials include the following materials in parts by weight: 61-69.5 parts of calcareous material, 28-35 parts of drilling cuttings, and 2.5-4 parts of iron material.

3. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1 or 2, characterized in that: The calcium raw material includes at least one of limestone, carbide slag and white mud.

4. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1 or 2, characterized in that: The iron material includes at least one of sulfate slag, red mud, iron tailings, and copper slag.

5. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1, characterized in that: In step S1, the drilling cuttings are dried to a constant weight, put into a ball mill and ground to a particle size of 1% to 3% with a residue on an 80 μm square hole sieve.

6. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1, characterized in that: The iron raw material and the calcium raw material are passed through a 200-mesh sieve and then mixed with the drilling cuttings powder.

7. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1, characterized in that: In step S3, 8-12% of the mass of the raw material powder is added with water, mixed evenly, and then pressed into a corrugated raw material cake under a pressure of 10.0-15.0 MPa, dried, and then calcined; Preferably, the size of the corrugated raw material cake is Wave-shaped raw material cake; Preferably, the raw cake is placed in an oven at 105° C. and dried to constant weight.

8. The method for preparing high-belite cement clinker using drilling cuttings according to claim 1, characterized in that: In step S3, the powder is ground to a Blaine specific surface area of ​​350±10m 2 / kg.

9. A high-belite cement clinker, characterized in that: The method according to any one of claims 1 to 8 is used to prepare the product.

10. The high-belite cement clinker according to claim 8, characterized in that: The total amount of β-type and α-type C2S is 61%-72%.

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