Magnesian solid waste-based high-gelling-property zero periclase cement clinker as well as preparation method and application thereof

Abstract

The invention discloses a magnesian solid waste-based high-gelling-property zero periclase cement clinker as well as a preparation method and application of the magnesian solid waste-based high-gelling-property zero periclase cement clinker. The cement clinker is prepared from the following components in percentage by weight: 50 to 55 percent of C3S, 15 to 25 percent of C2S, 35 to 10 percent of C4A, 5 to 15 percent of a Ca20Al13Mg3Si3O68 phase, 5 to 10 percent of C4AF, 0 to 8 percent of magnesium aluminate spinel (MgAl2O4) and 0 to 8 percent of magnesium silicate (Mg2SiO4). According to the method, the magnesium solid waste is effectively utilized to produce the cement clinker, functional utilization of MgO enriched in a clinker system is promoted, occurrence of periclase in the system is reduced, and therefore the risks of cement cracking, deformation and the like caused by the fact that the content of MgO in the clinker is too high are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cement clinker preparation, and in particular to a magnesia solid waste-based high-gelatinization zero-periclite cement clinker and a preparation method and application thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] General industrial solid waste consists of various slags, dust, and other wastes discharged into the environment during industrial production processes. These typically include tailings, fly ash, coal gangue, smelting waste, and slag. In recent years, with the rapid development of my country's industry, the amount of industrial solid waste generated has also been increasing. According to statistics, in 2023, my country's general industrial solid waste generation reached 4.28 billion tons, resulting in a serious accumulation. This not only places tremendous pressure on the environment and society, but also harmful substances in industrial solid waste (such as heavy metals and organic pollutants) can seep into the soil, contaminating groundwater, affecting crop growth, and even entering the human body through the food chain, endangering human health.

[0004] With the rapid development of the construction industry, the demand for cement is constantly increasing. High-quality raw materials required for cement production are being consumed in large quantities. At the same time, a large amount of low-grade raw materials are accumulating due to a lack of effective utilization. The solid waste residue associated with industrial production also poses a serious challenge to the ecological environment and sustainable resource utilization. Magnesium solid waste, a typical industrial solid waste, has a significantly higher MgO content than traditional cement production raw materials (such as limestone and clay). This results in the formation of a large amount of periclase minerals in the prepared cement clinker. These minerals are then converted into volume-expanding magnesium hydroxide crystals during the cement hydration stage. Once the accumulated expansion stress exceeds the structural bearing capacity of the hardened cement, it can cause quality defects such as cracking and deformation in the cement. This not only affects the safety of building structures but also severely limits the utilization of magnesium solid waste. Summary of the Invention

[0005] To address the above-mentioned issues, the present invention provides a magnesia solid waste-based, highly gelled, periclase-free cement clinker, as well as its preparation method and application. This not only effectively utilizes magnesia solid waste to produce cement clinker, but also promotes the functional utilization of MgO enriched within the clinker system, reducing the presence of periclase within the system. Specifically, the present invention discloses the following technical solutions.

[0006] First, the present invention discloses a magnesium solid waste-based high-gelatinization zero periclase cement clinker, comprising the following components: C3S 47.63-54.28wt.%, C2S 15.07-26.11wt.%, C4A3$ 5.34-9.88wt.%, Ca20 Al 13 Mg3Si3O 68 Phase 4.57~13.26wt.%, C4AF 4.92~10.41wt.%, magnesium aluminate spinel (MgAl2O4) 2.39~8.17wt.%, magnesium silicate (Mg2SiO4) 1.65~9.74wt.%.

[0007] Secondly, the present invention discloses a preparation method of the magnesium solid waste-based high-gelling zero-periclite cement clinker, which includes the following steps: using gypsum, fly ash, steel slag tailings, antimony slag, high-magnesium limestone, and ordinary limestone as raw materials, mixing them and then calcining them, and then rapidly cooling them after completion, and grinding them to obtain the cement clinker.

[0008] Furthermore, the proportions of the components in the raw materials are: 1.51-3.92 parts by weight of gypsum, 12.55-25.51 parts by weight of fly ash, 0.40-2.74 parts by weight of steel slag tailings, 0.78-7.97 parts by weight of antimony slag, 6.74-31.56 parts by weight of high-magnesium limestone, and 43.15-70.22 parts by weight of ordinary limestone.

[0009] Furthermore, the gypsum includes at least one of phosphogypsum, desulfurized gypsum, fluorinated gypsum, etc. Phosphogypsum is preferred, as the phosphorus and fluorine elements therein are beneficial for reducing the firing temperature of the clinker and saving energy consumption.

[0010] Furthermore, the high-magnesium limestone refers to limestone with a magnesium oxide content of not less than 8 wt.%.

[0011] Furthermore, the ordinary limestone refers to limestone with a calcium carbonate content of not less than 48 wt.%.

[0012] Furthermore, the calcination temperature is 1300-1350° C., and the calcination time is 60-120 min.

[0013] Finally, the present invention discloses the application of the magnesium solid waste-based high-gelling zero-periclite cement clinker in building walls, roads, bridges, water conservancy projects, etc.

[0014] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects: As mentioned above, when directly using magnesium solid waste raw materials to prepare cement clinker, it is easy to cause the MgO content to be too high, which in turn causes problems such as cracking and deformation of the cement hardened body. Therefore, the preparation method proposed in the present invention uses gypsum, fly ash, steel slag tailings, antimony slag, high-magnesium limestone, and ordinary limestone as raw materials to obtain a cement system that does not contain periclase mineral phase, thus effectively avoiding the above problems. This is because: on the one hand, through the Ca 20 Al 13Mg3Si3O 68 Phase, magnesium aluminum spinel and magnesium silicate can consume a large amount of magnesium, preventing the formation of harmful mineral phases such as periclase. On the other hand, the formation of the above-mentioned minerals converts the magnesium element, which is difficult to use, into a substance called Ca that is beneficial to the performance of the clinker. 20 Al 13 Mg3Si3O 68 phase, which is due to Ca 20 Al 13 Mg3Si3O 68 The phase has excellent early mechanical properties, which can improve the mechanical strength of the clinker. Since the hydration activity of the magnesium aluminum spinel and magnesium silicate is relatively low, the incompletely hydrated particles can fill the pores of the cement hardening slurry, reduce the porosity, and optimize the pore structure. The technology of the present invention not only solves the problem that magnesium solid waste is difficult to use in cement, but also effectively alleviates the pollution to the environment caused by the large-scale accumulation of industrial solid waste. In addition, the present invention also uses the antimony, phosphorus, titanium and other elements introduced by the antimony slag, phosphogypsum and steel slag tailings to improve the burnability and reduce the formation temperature of the mineral phase in the cement clinker, thereby expanding the temperature range for the coexistence of different minerals in the system and promoting the formation of low-temperature mineral phases such as calcium sulfoaluminate and Ca 20 Al 13 Mg3Si3O 68 Coexistence of phase and high-temperature mineral phase tricalcium silicate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] Figure 1 This is a diagram of the cement clinker sample prepared in Example 1 below.

[0017] Figure 2 The XRD test patterns of the cement clinkers prepared in the following Examples 1 to 3 are shown. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended to illustrate the present invention only and are not intended to limit the scope of the invention. The experimental methods in the following examples, for which specific conditions are not specified, are generally performed under conventional conditions or as recommended by the manufacturer.

[0019] Unless otherwise defined, all professional and scientific terms used in the present invention have the same meanings as those familiar to those skilled in the art. The reagents and raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents and raw materials used in the present invention are used in accordance with conventional methods in the art or in accordance with the product instructions.

[0020] In addition, any methods and materials similar or equivalent to those described herein can be applied to the method of the present invention. The technical solution of the present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0021] In the following examples, the main components of each component are shown in the following table (unit: wt. %).

[0022] Example 1 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 2.71 parts by weight of phosphogypsum, 17.06 parts by weight of fly ash, 1.95 parts by weight of steel slag tailings, 4.73 parts by weight of antimony slag, 13.48 parts by weight of high-magnesium limestone, and 60.08 parts by weight of ordinary limestone.

[0023] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0024] (3) Add water to the raw material and stir evenly, then press it into raw cake and dry it. After completion, place the raw cake in a muffle furnace and heat it to 1350℃ at a rate of 10℃ / min and calcine it for 60min, then take it out and air cool it. After completion, grind the obtained clinker and pass it through a 75μm sieve to obtain cement clinker. Figure 1 shown.

[0025] 1. The mineral components of the cement clinker prepared in this embodiment were tested, and the results were as follows: Figure 2 As shown. Among them: C3S 52.68wt.%, C2S 19.44wt.%, C4A3$ 5.34wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 7.53wt.%, C4AF 4.92wt.%, magnesium aluminate spinel (MgAl2O4) 5.72wt.%, magnesium silicate (Mg2SiO4) 2.26wt.%, and the rest are inevitable impurity phases.

[0026] 2. Performance Testing: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement at Standard Consistency" (GB / T 1346-2024). The results are shown in the table below.

[0027] Example 2 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 3.92 parts by weight of phosphogypsum, 18.86 parts by weight of fly ash, 2.01 parts by weight of steel slag tailings, 3.54 parts by weight of antimony slag, 17.78 parts by weight of high-magnesium limestone, and 53.89 parts by weight of ordinary limestone.

[0028] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0029] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0030] 1. The mineral components of the cement clinker prepared in this embodiment were tested, and the results were as follows: Figure 2 As shown. Among them: C3S 49.23wt.%, C2S 21.04wt.%, C4A3$ 6.42wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 4.57wt.%, C4AF 5.11wt.%, magnesium aluminate spinel (MgAl2O4) 8.17wt.%, magnesium silicate (Mg2SiO4) 2.77wt.%, and the rest are inevitable impurity phases.

[0031] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0032] Example 3 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 2.64 parts by weight of phosphogypsum, 17.84 parts by weight of fly ash, 1.17 parts by weight of steel slag tailings, 3.69 parts by weight of antimony slag, 11.17 parts by weight of high-magnesium limestone, and 63.49 parts by weight of ordinary limestone.

[0033] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0034] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0035] 1. The mineral components of the cement clinker prepared in this embodiment were tested, and the results were as follows: Figure 2 As shown. Among them: C3S 54.28wt.%, C2S 15.07wt.%, C4A3$ 9.88wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 8.13wt.%, C4AF 5.61wt.%, magnesium aluminate spinel (MgAl2O4) 2.39wt.%, magnesium silicate (Mg2SiO4) 3.12wt.%, and the rest are inevitable impurity phases.

[0036] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0037] Example 4 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 1.80 parts by weight of phosphogypsum, 12.55 parts by weight of fly ash, 0.72 parts by weight of steel slag tailings, 7.97 parts by weight of antimony slag, 6.74 parts by weight of high-magnesium limestone, and 70.22 parts by weight of ordinary limestone.

[0038] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0039] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0040] 1. The mineral components of the cement clinker prepared in this embodiment were tested, wherein: C3S 50.08wt.%, C2S 26.11wt.%, C4A3$ 5.94wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 6.26wt.%, C4AF 6.18wt.%, magnesium aluminate spinel (MgAl2O4) 2.67wt.%, magnesium silicate (Mg2SiO4) 1.65wt.%, and the remainder are inevitable impurity phases.

[0041] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0042] Example 5 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 1.51 parts by weight of phosphogypsum, 25.51 parts by weight of fly ash, 2.74 parts by weight of steel slag tailings, 0.78 parts by weight of antimony slag, 18.36 parts by weight of high-magnesium limestone, and 51.10 parts by weight of ordinary limestone.

[0043] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0044] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0045] 1. The mineral components of the cement clinker prepared in this embodiment were tested, wherein: C3S 49.82wt.%, C2S 15.56wt.%, C4A3$ 4.73wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 13.26wt.%, C4AF 5.02wt.%, magnesium aluminate spinel (MgAl2O4) 8.17wt.%, magnesium silicate (Mg2SiO4) 2.19wt.%, and the rest are inevitable impurity phases.

[0046] 2. Performance Test: The compressive strength of the cement clinker prepared in this embodiment was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this embodiment was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T1346-2024). The results are shown in the following table.

[0047] Example 6 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 2.56 parts by weight of phosphogypsum, 17.03 parts by weight of fly ash, 1.63 parts by weight of steel slag tailings, 3.75 parts by weight of antimony slag, 15.23 parts by weight of high-magnesium limestone, and 59.80 parts by weight of ordinary limestone.

[0048] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0049] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0050] 1. The mineral components of the cement clinker prepared in this embodiment were tested, wherein: C3S51.21wt.%, C2S 16.34wt.%, C4A3$ 6.15wt.%, Ca 20 Al 13 Mg3Si3O 68Phase 5.06wt.%, C4AF10.41wt.%, magnesium aluminate spinel (MgAl2O4) 5.42wt.%, magnesium silicate (Mg2SiO4) 3.58wt.%, and the rest are inevitable impurity phases.

[0051] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0052] Example 7 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 2.95 parts by weight of phosphogypsum, 16.39 parts by weight of fly ash, 0.40 parts by weight of steel slag tailings, 5.55 parts by weight of antimony slag, 31.56 parts by weight of high-magnesium limestone, and 43.15 parts by weight of ordinary limestone.

[0053] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0054] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0055] 1. The mineral components of the cement clinker prepared in this embodiment were tested, wherein: C3S 47.63wt.%, C2S 15.97wt.%, C4A3$ 7.16wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 6.29wt.%, C4AF 7.37wt.%, magnesium aluminate spinel (MgAl2O4) 4.25wt.%, magnesium silicate (Mg2SiO4) 9.74wt.%, and the remainder are inevitable impurity phases.

[0056] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0057] Example 8 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 2.55 parts by weight of phosphogypsum, 3.08 parts by weight of fly ash, 1.25 parts by weight of steel slag tailings, 12.13 parts by weight of antimony slag, 39.12 parts by weight of high-magnesium limestone, and 41.87 parts by weight of ordinary limestone.

[0058] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0059] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0060] 1. The mineral composition of the cement clinker prepared in this embodiment was tested, wherein: C3S 52.25wt.%, C2S 22.17wt.%, C4A3$ 5.34wt.%, C4AF 7.76wt.%, magnesium silicate (Mg2SiO4) 3.68wt.%, MgO 7.02wt.%, and the remainder were inevitable impurities.

[0061] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0062] Example 9 A method for preparing magnesia solid waste-based high-gelatinization zero-periclite cement clinker comprises the following steps: (1) Weigh the raw materials in the following proportions: 3.75 parts by weight of phosphogypsum, 4.35 parts by weight of fly ash, 1.44 parts by weight of steel slag tailings, 10.89 parts by weight of antimony slag, 37.16 parts by weight of high-magnesium limestone, and 42.41 parts by weight of ordinary limestone.

[0063] (2) The above raw materials are added into a planetary ball mill and ground. The obtained mixture is dried to obtain the raw material.

[0064] (3) Add water to the raw meal and stir evenly, then press into raw cakes and dry them. After completion, the raw cakes are placed in a muffle furnace and heated to 1350°C at a rate of 10°C / min and calcined for 60 minutes. They are then taken out and air-cooled. After completion, the obtained clinker is ground and passed through a 75μm sieve to obtain cement clinker.

[0065] 1. The mineral composition of the cement clinker prepared in this embodiment was tested, wherein: C3S 49.23wt.%, C2S 23.04wt.%, C4A3$ 6.42wt.%, C4AF 8.11wt.%, magnesium silicate (Mg2SiO4) 2.77wt.%, MgO 7.18wt.%, and the remainder were inevitable impurities.

[0066] 2. Performance Test: The compressive strength of the cement clinker prepared in this example was tested according to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T 17671-1999). The stability (expansion value) of the cement clinker prepared in this example was tested according to the "Test Method for Water Consumption, Setting Time, and Stability of Cement Standard Consistency" (GB / T 1346-2024). The results are shown in the following table.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A magnesia solid waste-based high-gelling zero-periclite cement clinker, characterized in that: It includes the following components: C3S 47.63~54.28wt.%, C2S 15.07~26.11wt.%, C4A3$ 5.34~9.88wt.%, Ca 20 Al 13 Mg3Si3O 68 Phase 4.57~13.26wt.%, C4AF 4.92~10.41wt.%, magnesia alumina spinel 2.39~8.17wt.%, magnesium silicate 1.65~9.74wt.%.

2. The method for preparing the magnesia solid waste-based high-gelling periclase cement clinker according to claim 1, characterized in that: The method comprises the following steps: using gypsum, fly ash, steel slag tailings, antimony slag, high-magnesium limestone and ordinary limestone as raw materials, mixing them evenly and then calcining them, rapidly cooling them after completion, and grinding them to obtain the cement clinker.

3. The method for preparing magnesia solid waste-based high-gelling periclase cement clinker according to claim 2, characterized in that: The proportions of the components in the raw materials are: 1.51-3.92 parts by weight of gypsum, 12.55-25.51 parts by weight of fly ash, 0.40-2.74 parts by weight of steel slag tailings, 0.78-7.97 parts by weight of antimony slag, 6.74-31.56 parts by weight of high-magnesium limestone, and 43.15-70.22 parts by weight of ordinary limestone.

4. The method for preparing magnesia solid waste-based high-gelling periclase cement clinker according to claim 2, characterized in that: The gypsum includes at least one of phosphogypsum, desulfurized gypsum, and fluorinated gypsum, preferably phosphogypsum.

5. The method for preparing magnesia solid waste-based high-gelling periclase cement clinker according to claim 2, characterized in that: The high-magnesium limestone refers to limestone with a magnesium oxide content of not less than 8 wt.%.

6. The method for preparing magnesia solid waste-based high-gelling periclase cement clinker according to claim 2, characterized in that: The ordinary limestone refers to limestone with a calcium carbonate content of not less than 48 wt.%.

7. The method for preparing magnesia solid waste-based high-gelling periclase cement clinker according to any one of claims 2 to 5, characterized in that: The calcination temperature is 1300-1350° C., and the calcination time is 60-120 minutes.

8. Use of the magnesia solid waste-based high-gelling zero-periclite cement clinker according to claim 1, or the cement clinker obtained by the preparation method according to any one of claims 2 to 7 in building walls, roads, bridges or water conservancy projects.

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