Self-carbonation enhanced high-potassium Portland cement clinker, and preparation method and application thereof

Abstract

The present invention relates to the technical field of silicate cement clinker preparation, and specifically discloses a self-carbonizing enhanced high-potassium silicate cement clinker and its preparation method and application. The mineral composition of the cement clinker comprises, by mass percentage, C3S-M1 15.97-18.35%, C3S-M3 35.83-36.34%, C2S-α' L 18.99~20.57%, C2S-β 1.3~2%, C3A-c 0.09~0.72%, C3A-o 12.71~15.33%, C4AF 9.24~10.91%, secondary free CaO 1.28~1.48%. The present invention not only reduces the harm of crusting and ringing caused by alkali-sulfur cycle, but also utilizes C2S-α' L Due to the difference in hydration rates between C3A‑o and C3A‑o, the clinker system can release K continuously but not concentratedly after contact with water. + Ions ensure that the alkalinity will not decrease during the hydration process, provide a good alkaline environment for carbonization, and improve the mechanical strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of Portland cement clinker preparation, and particularly relates to a self-carbonation enhanced high-potassium Portland cement clinker, a preparation method and application thereof. BACKGROUND

[0002] The information disclosed in this Background section is for the purpose of increasing an understanding of the general context of the present application and is not necessarily recognized as prior art.

[0003] 1.2 tons of limestone are consumed for producing 1 ton of cement clinker, and the large consumption of limestone leads to the continuous reduction of high-quality limestone resources, so that the cement industry starts to use low-grade high-potassium limestone, forming high-potassium Portland cement clinker. At present, the main defect of high-potassium clinker is the low 28-day strength of the clinker. In order to solve this problem, one of the methods is to adjust the sulfur-alkali ratio in the batching process by adding extra gypsum to improve the 28-day strength of the clinker.

[0004] However, the batching of extra gypsum will cause the enrichment of alkali and sulfur at the tail of the cement rotary kiln, forming a skin and a ring, and affecting the normal calcination conditions. In addition, the introduction of gypsum will stabilize the C2S-β phase, on the one hand, the stabilized C2S-β phase will not continue to participate in the formation of C3S, resulting in the low C3S content of the obtained cement clinker. On the other hand, the introduction of gypsum will remove K + ion capture, so that K + ion-stabilized high-activity C2S-α' L content is greatly reduced, which has an adverse effect on the early strength development of the cement material. SUMMARY

[0005] In view of the above problems, the present application provides a self-carbonation enhanced high-potassium Portland cement clinker, a preparation method and application thereof, which improves the 28-day strength of the high-potassium Portland cement clinker without affecting the normal production and other properties of the cement clinker. Specifically, the technical scheme of the present application is as follows.

[0006] Firstly, the present application discloses a self-carbonation enhanced high-potassium Portland cement clinker, and the mineral composition of the cement clinker comprises, in percentage by mass: C3S-M1 15.97-18.35%, C3S-M3 35.83-36.34%, C2S-α' L18.99~20.57%, C2S-β 1.3~2%, C3A-c 0.09~0.72%, C3A-o 12.71~15.33%, C4AF 9.24~10.91%, secondary free CaO 1.28~1.48%. L To pass K + It is obtained by doping Ca2SiO4, and its chemical formula is K2O·23CaO·12SiO2. The secondary free calcium is the decomposition product of the calcined product tricalcium silicate during the cooling process.

[0007] Secondly, the present invention discloses a raw material composition for preparing the self-carbonizing enhanced high-potassium Portland cement clinker, which is composed of the following components: 64.7 to 65.4 parts by weight of calcium oxide, 20.4 to 22.0 parts by weight of silicon oxide, 7.1 to 7.3 parts by weight of aluminum oxide, 3.6 to 4.7 parts by weight of iron oxide, and 2.1 to 2.9 parts by weight of potassium oxide.

[0008] The present invention further discloses a process for preparing the self-carbonizing enhanced high-potassium Portland cement clinker, comprising the steps of: uniformly mixing the raw materials and then calcining them. After calcination, the calcined product is rapidly cooled and then ground into powder to obtain the cement clinker.

[0009] Furthermore, the raw materials are mixed and then ground, and the resulting mixed powder is made into a raw material cake, and then calcined. Optionally, the grinding time is 1 to 1.5 hours.

[0010] Furthermore, the calcination temperature is 1420-1450° C., and the calcination time is 30-60 min.

[0011] Furthermore, the rapid cooling method includes any one of liquid nitrogen cooling, air cooling, etc.

[0012] Furthermore, the fineness of the cement clinker is 60-100 μm.

[0013] Finally, the present invention discloses the use of the self-carbonizing enhanced high-potassium Portland cement clinker in cement materials. Optionally, the cement material comprises the cement clinker and gypsum.

[0014] Furthermore, the gypsum addition amount is 3-5% of the mass of cement clinker.

[0015] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0016] (1) The self-carbonation enhanced high potassium Portland cement clinker of the present application does not use gypsum as raw material in preparation, which not only reduces the harm of skinning and ring forming caused by alkali-sulfur cycle, but also makes the mineral phase K2SO4 in the clinker minerals of the present application not exist, and because SO3 in gypsum has the effect of stabilizing C2S-β crystal form and the effect of capturing K+ + ion, the low-activity C2S-β phase in the present application is maintained at a low content level, while the high-activity C2S-α’ + phase stabilized by K+ L ion is maintained at a level much higher than that of C2S-β phase, thereby being able to significantly improve the early strength of the cement clinker.

[0017] (2) Because the capture of K+ + by gypsum is avoided, the crystal form of C3A in the cement clinker of the present application mainly exists in the C3A-o phase which coagulates very quickly, and the content of C3A-o phase is greatly improved, so that the clinker has the characteristics of fast setting, and also has the ability to promote the release of K+ + in the early hydration of the clinker. When the above-mentioned cement clinker of the present application is subjected to hydration reaction with water, the rapid release of K+ + in the early hydration can significantly increase the alkalinity of the reaction system, thereby accelerating the capture and absorption of CO2 in the air, completing the self-carbonation, and the calcium carbonate formed effectively improves the 28-day mechanical strength of the cement clinker of the present application. The cement clinker of the present application utilizes the difference in hydration rate of C2S-α’ L and C3A-o, so that the clinker system can continuously but not concentratedly release K+ + ion after contacting with water, ensuring that the alkalinity in the hydration process does not decrease, and providing a good alkaline environment for carbonation.

[0018] (3) The cement clinker of the present application contains a certain amount of secondary free calcium oxide, which can react quickly to form calcium hydroxide after contacting with water, thereby inducing the formation of more carbonizable calcium hydroxide crystals, and rapidly carbonizing to form calcium carbonate under the cooperation of the C3A-o phase, thereby improving the 28-day strength of the high potassium Portland clinker of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application.

[0020] Figure 1 The sample graph of the self-carbonation enhanced high potassium Portland cement clinker of the following Example 1.

[0021] Figure 2 The X-ray diffraction pattern of the cement clinker prepared in the following Example 1.

[0022] Figure 3 Scanning electron microscope (SEM) images of carbonated cement clinker prepared for the following Example 1.

[0023] Figure 4 X-ray diffraction pattern of cement clinker prepared for the following Example 2.

[0024] Figure 5 X-ray diffraction pattern of cement clinker prepared for the following Example 3.

[0025] Figure 6 X-ray diffraction pattern of cement clinker prepared for the following Example 4.

[0026] Figure 7 X-ray diffraction pattern of cement clinker prepared for the following Example 5. DETAILED DESCRIPTION

[0027] The application will be further described with reference to the following examples. It should be understood that these examples are intended to illustrate the application and are not intended to limit the scope of the application. The experimental methods in the following examples, unless otherwise indicated, were carried out under conventional conditions or under conditions recommended by the manufacturer. In addition, any method and material similar or equivalent to those described herein can be used in the practice of the present application. The present application will be further described with reference to the accompanying drawings and the following examples.

[0028] Example 1

[0029] A preparation process of self-carbonation reinforced high potassium Portland cement clinker, comprising the following steps:

[0030] (1) Take the following weight parts of raw materials: calcium oxide 64.7 parts, silicon oxide 20.4 parts, aluminum oxide 7.3 parts, iron oxide 4.7 parts, potassium oxide 2.9 parts.

[0031] (2) After mixing the above raw materials, place them in a disc mill for crushing, and then put them into a planetary mill for grinding at a speed of 600 revolutions / minute for 1.2 hours. Then, place the ground powder in a mold and press it into a cylindrical green cake with a diameter of 50 mm and a thickness of 10 mm using a press machine at a pressure of 100 KN.

[0032] (3) Place the green cake in a muffle furnace and heat it to 1430°C at a rate of 15°C / minute, and after keeping it at this temperature for 30 min, take it out, and then use an electric fan to rapidly cool the clinker. Place the cooled cement clinker in a disc mill for crushing, and then put it into a planetary ball mill for grinding at a speed of 600 revolutions / minute for 1 hour. Then, sieve the ground powder through an 80um square hole sieve until the residue is controlled within 10%, and the self-carbonation reinforced high potassium Portland cement clinker is obtained, such asFigure 1 shown.

[0033] The X-ray diffraction pattern of the self-carbonized enhanced high potassium Portland cement clinker prepared in this embodiment is as follows: Figure 2 The mineral composition of the cement clinker was determined by the Rietveld standardless quantitative method, and the results were: C3S-M1 15.97%, C3S-M3 35.83%, C2S-α' L 20.57%, C2S-β 1.65%, C3A-c 0.25%, C3A-o 13.47%, C4AF 10.91%, CaO 1.35%.

[0034] Figure 3 The SEM image of the cement clinker prepared in Example 1 after carbonization shows that there are a large number of cubic calcium carbonate particles formed by self-carbonization, and the particle size is small, which can well enhance the mechanical properties of the cement clinker.

[0035] 95 parts by weight of the self-carbonizing reinforced high-potassium Portland cement clinker prepared in this example and 5 parts by weight of dihydrate gypsum were mixed and ground to obtain cement powder. The 3d and 28d compressive strengths of the cement mortar formed by this cement powder were then tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T17671-1999). The results were: 3d compressive strength = 29.6 MPa, and 28d compressive strength = 57.3 MPa.

[0036] The cement mortar specimens aged 28 days were quantitatively analyzed using a standardized quantitative method, and the CaCO3 content in the specimens was used as an indicator of the degree of carbonation. The result was: CaCO3 content = 8.54 wt.%.

[0037] Example 2

[0038] A process for preparing self-carbonized enhanced high-potassium Portland cement clinker comprises the following steps:

[0039] (1) Take the following raw materials in parts by weight: 65.1 parts of calcium oxide, 20.9 parts of silicon oxide, 7.3 parts of aluminum oxide, 4.6 parts of iron oxide, and 2.1 parts of potassium oxide.

[0040] (2) The raw materials were mixed and crushed in a disc mill. They were then ground in a planetary mill at 600 rpm for 1.2 hours. The ground powder was then placed in a mold and pressed into a cylindrical raw cake with a diameter of 50 mm and a thickness of 10 mm using a press at a pressure of 100 kN.

[0041] (3) The green cake is placed in a muffle furnace to be heated at a rate of 15°C / min to 1430°C, and after being kept at this temperature for 30 min, it is taken out, then an electric fan is used to rapidly cool the clinker, the cooled cement clinker is put into a disc mill to be crushed, then it is put into a planetary ball mill to be ground at a speed of 600 rpm for 1 hour, and then the ground powder is sieved through an 80-μm square-hole sieve until the residue is controlled within 10%, thereby obtaining the self-carbonation-enhanced high-potassium portland cement clinker.

[0042] The X-ray diffraction pattern of the self-carbonation-enhanced high-potassium portland cement clinker prepared in this example is shown in FIG. 1. Figure 4 The mineral composition of the cement clinker is determined by Rietveld uncalibrated quantitative method, and the results are as follows: C3S-M118.35%, C3S-M336.06%, C2S-a 18.99%, C2S-β 2.00%, C3A-c 0.18%, C3A-o 13.69%, C4AF 9.27%, CaO 1.46%. L

[0043] The self-carbonation-enhanced high-potassium portland cement clinker prepared in this example is taken 97 parts by weight, and dihydrate gypsum is taken 3 parts by weight, the two are mixed and ground to obtain a cement powder. Then, according to the "Cement and Mortar Strength Test Method (ISO Method)" (GB / T 17671-1999), the 3d and 28d compressive strengths of the cement mortar formed by the cement powder are tested, and the results are as follows: 3d compressive strength = 28.1 MPa, and 28d compressive strength = 59.7 MPa.

[0044] The cement mortar test block with an age of 28 days is subjected to quantitative phase analysis by using the calibrated method, and the content of CaCO3 in the test sample is used as an index for measuring the degree of carbonation, and the results are as follows: CaCO3 content = 9.62 wt.%.

[0045] Example 3

[0046] A preparation process of a self-carbonation-enhanced high-potassium portland cement clinker, comprising the following steps:

[0047] (1) The following raw materials are taken by weight: calcium oxide 64.7 parts, silicon oxide 20.9 parts, aluminum oxide 7.1 parts, iron oxide 4.7 parts, and potassium oxide 2.6 parts.

[0048] (2) The above raw materials are mixed and then placed in a disc mill to be crushed, and then they are put into a planetary mill to be ground at a speed of 600 rpm for 1.2 hours. Then, the ground material is placed in a mold and pressed into a cylindrical green cake with a diameter of 50 mm and a thickness of 10 mm by a press machine at a pressure of 100 KN. ​

[0049] (3) The green cake is placed in a muffle furnace to be heated at a rate of 15°C / min to 1420°C, and after 60 min at this temperature, it is removed and then rapidly cooled using an electric fan. The cooled cement clinker is then broken up in a disc mill and then ground in a planetary ball mill at 600 rpm for 1 hour. The ground powder is then sieved through an 80-μm square-hole sieve until the residue is controlled to within 10%, thereby obtaining the self-carbonation-enhanced high-potassium portland cement clinker.

[0050] The X-ray diffraction pattern of the self-carbonation-enhanced high-potassium portland cement clinker prepared in this example is shown in FIG. 1. The mineral composition of the cement clinker was determined using the Rietveld uncalibrated method, and the results were as follows: C3S-M1 16.04%, C3S-M3 36.34%, C2S-a' 19.19%, C2S-β 1.64%, C3A-c 0.09%, C3A-o 15.33%, C4AF 9.98%, CaO 1.39%. L Figure 5

[0051] The self-carbonation-enhanced high-potassium portland cement clinker prepared in this example is mixed with 3 parts by weight of dihydrate gypsum, and the mixture is ground to obtain a cement powder. The 3d and 28d compressive strengths of the cement mortar formed from the cement powder are then tested according to the "Cement and Concrete Strength Test Method (ISO Method)" (GB / T 17671-1999), and the results are as follows: 3d compressive strength = 27.9 MPa, 28d compressive strength = 60.5 MPa.

[0052] The cement mortar test block with an age of 28 days is subjected to quantitative phase analysis using the calibrated method, and the content of CaCO3 in the test sample is used as an index for measuring the degree of carbonation, and the results are as follows: CaCO3 content = 10.28 wt.%.

[0053] Example 4

[0054] A preparation process for a self-carbonation-enhanced high-potassium portland cement clinker, comprising the following steps:

[0055] (1) The following raw materials are taken: calcium oxide 65.4 parts, silicon oxide 21.0 parts, aluminum oxide 7.2 parts, iron oxide 4.2 parts, and potassium oxide 2.2 parts.

[0056] (2) The above raw materials are mixed and then broken up in a disc mill, and then they are placed in a planetary mill and ground at 600 rpm for 1.2 hours. The ground material is then pressed into a cylindrical green cake with a diameter of 50 mm and a thickness of 10 mm using a press machine at a pressure of 100 KN.​​

[0057] (3) The raw cake is placed in a muffle furnace and heated to 1450°C at a rate of 15°C / min, and kept at this temperature for 30 minutes before being taken out. The clinker is then rapidly cooled by an electric fan. The cooled cement clinker is placed in a disc mill for crushing, and then placed in a planetary ball mill and ground at a speed of 600 rpm for 1 hour. The ground powder is then sieved through an 80 μm square hole sieve until the sieve residue is controlled within 10%, thereby obtaining carbonization-enhanced high-potassium silicate cement clinker.

[0058] The X-ray diffraction pattern of the self-carbonized enhanced high potassium Portland cement clinker prepared in this embodiment is as follows: Figure 6 The mineral composition of the cement clinker was determined by the Rietveld standardless quantitative method, and the results were: C3S-M1 18.25%, C3S-M3 36.31%, C2S-α' L 19.61%, C2S-β 1.36%, C3A-c 0.28%, C3A-o 13.67%, C4AF 9.24%, CaO1.28%.

[0059] 96 parts by weight of the self-carbonizing reinforced high-potassium Portland cement clinker prepared in this example and 4 parts by weight of dihydrate gypsum were mixed and ground to obtain cement powder. The 3d and 28d compressive strengths of the cement mortar formed from this cement powder were then tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T17671-1999). The results were: 3d compressive strength = 28.8 MPa, and 28d compressive strength = 58.9 MPa.

[0060] The cement mortar specimens aged 28 days were quantitatively analyzed using a standardized quantitative method, and the CaCO3 content in the specimens was used as an indicator of the degree of carbonation. The result was: CaCO3 content = 8.77 wt.%.

[0061] Example 5

[0062] A process for preparing self-carbonized enhanced high-potassium Portland cement clinker comprises the following steps:

[0063] (1) Take the following raw materials in parts by weight: 64.7 parts of calcium oxide, 22 parts of silicon oxide, 7.3 parts of aluminum oxide, 3.6 parts of iron oxide, and 2.3 parts of potassium oxide.

[0064] (2) The raw materials were mixed and crushed in a disc mill. They were then ground in a planetary mill at 600 rpm for 1.2 hours. The ground powder was then placed in a mold and pressed into a cylindrical raw cake with a diameter of 50 mm and a thickness of 10 mm using a press at a pressure of 100 kN.

[0065] (3) The raw cake is placed in a muffle furnace and heated to 1440°C at a rate of 15°C / min, and is kept at this temperature for 50 minutes before being taken out. The clinker is then rapidly cooled by an electric fan. The cooled cement clinker is placed in a disc mill for crushing, and then placed in a planetary ball mill for grinding at a speed of 600 rpm for 1 hour. The ground powder is then sieved through an 80 μm square hole sieve until the sieve residue is controlled within 10%, thereby obtaining carbonization-enhanced high-potassium silicate cement clinker.

[0066] The X-ray diffraction pattern of the self-carbonized enhanced high potassium Portland cement clinker prepared in this embodiment is as follows: Figure 7 The mineral composition of the cement clinker was determined by the Rietveld standardless quantitative method, and the results were: C3S-M1 17.75%, C3S-M3 36.08%, C2S-α' L 20.16%, C2S-β 1.30%, C3A-c 0.72%, C3A-o 12.71%, C4AF 9.8%, CaO1.48%.

[0067] The X-ray diffraction pattern of the self-carbonized enhanced high potassium Portland cement clinker prepared in this embodiment is as follows: Figure 6 The mineral composition of the cement clinker was determined by the Rietveld standardless quantitative method, and the results were: C3S-M1 18.25%, C3S-M3 36.31%, C2S-α' L 19.61%, C2S-β 1.36%, C3A-c 0.28%, C3A-o 13.67%, C4AF 9.24%, CaO1.28%.

[0068] 97 parts by weight of the self-carbonizing reinforced high-potassium Portland cement clinker prepared in this example and 3 parts by weight of dihydrate gypsum were mixed and ground to obtain cement powder. The 3d and 28d compressive strengths of the cement mortar formed from this cement powder were then tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T17671-1999). The results were: 3d compressive strength = 29.7 MPa, and 28d compressive strength = 56.6 MPa.

[0069] The cement mortar specimens aged 28 days were quantitatively analyzed using a standardized quantitative method, and the CaCO3 content in the sample was used as an indicator to measure the degree of carbonation. The result was: CaCO3 content = 8.23 ​​wt.%.

[0070] Example 6

[0071] A preparation process of self-carbonation enhanced high potassium portland cement clinker, comprising the following steps:

[0072] (1) Take the following raw materials by weight: calcium oxide 65.3 parts, silicon oxide 21.1 parts, aluminum oxide 5.5 parts, iron oxide 3.4 parts, potassium oxide 2.2 parts, gypsum (calculated as SO3) 2.5 parts.

[0073] (2) After mixing the above raw materials, place them in a disc mill for crushing, and then put them into a planetary mill for grinding at a speed of 600 revolutions per minute for 1.2 hours. Then, the ground material is placed in a mold and pressed into a cylindrical green cake with a diameter of 50 mm and a thickness of 10 mm by a press machine at a pressure of 100 KN.

[0074] (3) Place the green cake in a muffle furnace and heat it to 1430℃ at a rate of 15℃ / min, and after keeping it at this temperature for 30 min, take it out, then use an electric fan to rapidly cool the clinker, and then put the cooled cement clinker into a disc mill for crushing, and then put it into a planetary ball mill for grinding at a speed of 600 revolutions per minute for 1 hour, and then screen the ground powder through an 80um square hole screen until the residue is controlled within 10%, to obtain the self-carbonation enhanced high potassium portland cement clinker.

[0075] The mineral composition of the self-carbonation enhanced high potassium portland cement clinker prepared in this embodiment is determined by Rietveld uncalibrated method, and the results are: C3S-M127.01%, C3S-M3 37.83%, C2S-α' L 2.17%, C2S-β 11.41%, C3A-c 3.23%, C3A-o 0.31%, C4AF 13.14%, CaO 0.1%, K2SO4 4.8%.

[0076] Take 97 parts by weight of the self-carbonation enhanced high potassium portland cement clinker prepared in this embodiment and 3 parts by weight of dihydrate gypsum, mix and grind them to obtain a cement powder. Then, according to the "Cement and Mortar Strength Test Method (ISO Method)" (GB / T17671-1999), the 3d and 28d compressive strengths of the cement mortar formed by the cement powder are tested, and the results are: 3d compressive strength = 22.8 MPa, 28d compressive strength = 45.2 MPa.

[0077] The cement mortar test block with an age of 28 days is subjected to quantitative phase analysis by using the calibrated method, and the content of CaCO3 in the test sample is used as an index to measure the degree of carbonation, and the results are: CaCO3 content = 0.41wt.%. It can be seen that, compared with Examples 1-5, the introduction of SO3 during the preparation of the cement clinker in Example 6 leads to a significant decrease in the early strength and 28d strength of the cement clinker and the self-carbonation capacity.

[0078] The above merely provides preferred embodiments of the application, and is not used to limit the application. Although the application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can still be modified or some technical features can be replaced equivalently by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A self-carbonizing reinforced high-potassium Portland cement clinker, characterized in that: The mineral composition of the cement clinker is as follows: C3S-M1 15.97-18.35%, C3S-M3 35.83-36.34%, C2S-α' L 18.99~20.57%, C2S-β 1.3~2%, C3A-c 0.09~0.72%, C3A-o 12.71~15.33%, C4AF 9.24~10.91%, secondary free CaO 1.28~1.48%; wherein: the C2S-α' L To pass K + K2O·23CaO·12SiO2 is obtained by doping with Ca2SiO4; the secondary free CaO is the decomposition product of the calcined product tricalcium silicate during the cooling process.

2. The self-carbonizing enhanced high potassium Portland cement clinker according to claim 1, characterized in that The fineness of the cement clinker is 60-100 μm.

3. The raw material composition for preparing the self-carbonizing enhanced high potassium Portland cement clinker according to any one of claims 1 to 2 is characterized in that: The invention is composed of the following components: 64.7-65.4 parts by weight of calcium oxide, 20.4-22.0 parts by weight of silicon oxide, 7.1-7.3 parts by weight of aluminum oxide, 3.6-4.7 parts by weight of iron oxide, and 2.1-2.9 parts by weight of potassium oxide.

4. The process for preparing the self-carbonizing enhanced high potassium Portland cement clinker according to any one of claims 1 to 2, characterized in that: The method comprises the following steps: uniformly mixing the components of the raw material composition according to claim 3 and then calcining the mixture; after the mixture is calcined, rapidly cooling the calcined product and then grinding it into powder to obtain the cement clinker.

5. The process for preparing self-carbonizing enhanced high potassium Portland cement clinker according to claim 4, characterized in that: The raw materials are mixed and ground first, and then the obtained mixed powder is made into raw material cakes, and then calcined.

6. The process for preparing self-carbonizing enhanced high potassium Portland cement clinker according to claim 5, characterized in that: The grinding time is 1 to 1.5 hours.

7. The process for preparing self-carbonizing enhanced high potassium Portland cement clinker according to claim 4, characterized in that: The calcination temperature is 1420-1450° C., and the calcination time is 30-60 minutes.

8. The process for preparing self-carbonizing enhanced high potassium Portland cement clinker according to claim 4, characterized in that: The rapid cooling method includes any one of liquid nitrogen cooling and air cooling.

9. Use of the self-carbonizing enhanced high potassium Portland cement clinker according to any one of claims 1 to 2, or the cement clinker obtained by the preparation process according to any one of claims 4 to 8 in cement materials.

10. The use according to claim 9, characterized in that The cement material includes cement clinker and gypsum.

11. The use according to claim 10, characterized in that The gypsum addition amount is 3-5% of the cement clinker mass.

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