High-efficiency coal-saving agent for cement clinker firing and its preparation process and application

Abstract

The application discloses a high-efficiency coal-saving agent for cement clinker firing and a preparation process and application thereof. The coal-saving agent comprises 10-20 parts by weight of a penetrating agent, 7-15 parts by weight of a dispersing agent, 20-25 parts by weight of a catalyst, 9-13 parts by weight of a bulk agent, 30-48 parts by weight of a heat-providing agent and 60-70 parts by weight of hydrogen peroxide. The heat-providing agent is a powder formed by consolidation of aluminum powder, iron oxide powder, magnesium powder and glass powder, and the mass ratio of the aluminum powder to the iron oxide powder is 1:4-7. The magnesium powder accounts for 12-20% of the total mass of the aluminum powder and the iron oxide powder. The glass powder accounts for 14-16% of the total mass of the aluminum powder and the iron oxide powder. The coal-saving agent disclosed by the application not only can effectively reduce the coal consumption, but also has the effect of sulfur fixation, thereby reducing the emission of sulfur oxide gas.

Description

Technical Field

[0001] This invention relates to the field of coal-saving agent technology, specifically to a high-efficiency coal-saving agent for cement clinker calcination, its preparation process, and its application. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Cement clinker is obtained by calcining and grinding raw meal. Since the calcination process typically takes place at high temperatures, maintaining these high temperatures requires a large amount of coal. Studies show that producing one ton of cement clinker consumes approximately 100 kg of standard coal and emits about 0.8 tons of carbon dioxide, as well as pollutants such as sulfur oxides and nitrogen oxides. Therefore, the cement production industry is a high-energy-consuming and high-polluting industry.

[0004] To improve the thermal efficiency of coal and achieve energy conservation and efficiency gains, adding coal-saving agents to coal / pulverized coal used in cement clinker calcination is a common practice. Since reducing coal consumption also lowers emissions of gases such as carbon dioxide, the use of coal-saving agents can bring both economic and environmental benefits to enterprises. Current coal-saving agents primarily achieve their effect by promoting the complete combustion of coal and improving its thermal efficiency. However, this method has limited effectiveness in saving coal, especially as high-quality coal resources become increasingly scarce, limiting the application of traditional coal-saving agents. Summary of the Invention

[0005] This invention provides a high-efficiency coal-saving agent for cement clinker calcination, its preparation process, and its application. This coal-saving agent not only effectively reduces coal consumption but also has a sulfur-fixing effect, thereby helping to reduce sulfur oxide emissions. Specifically, the technical solution of this invention is as follows.

[0006] First, this invention discloses a high-efficiency coal-saving agent for cement clinker calcination, comprising: 10-20 parts by weight of penetrant, 7-15 parts by weight of dispersant, 20-25 parts by weight of catalyst, 9-13 parts by weight of expander, 30-48 parts by weight of heating agent, and 60-70 parts by weight of hydrogen peroxide. The heating agent is a powder formed by the solidification of aluminum powder, iron oxide powder, magnesium powder, and glass powder, wherein the mass ratio of aluminum powder to iron oxide powder is 1:4-7. The magnesium powder constitutes 12-20% of the total mass of the aluminum powder and iron oxide powder, and the glass powder constitutes 14-16% of the total mass of the aluminum powder and iron oxide powder.

[0007] Furthermore, the penetrant includes any one of isooctanol polyoxyethylene ether, dodecyltrimethylammonium chloride, sodium dodecyl sulfonate, alkylphenol polyoxyethylene ether, etc.

[0008] Furthermore, the dispersant includes any one of polyoxyethylene ether, sodium dodecylbenzenesulfonate, sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, etc.

[0009] Furthermore, the catalyst includes at least one of zinc chloride, titanium trichloride, cerium nitrate, ferric sulfate, and copper sulfate.

[0010] Furthermore, the leavening agent includes at least one of sodium chloride, potassium chloride, sodium bicarbonate, sodium lignosulfonate, etc.

[0011] Further, the iron oxide includes at least one of ferric oxide and magnetite. Optionally, the particle size of the heating agent is 30-50 mesh.

[0012] Furthermore, the hydrogen peroxide has a mass fraction of 20-35%.

[0013] Secondly, the present invention discloses a method for preparing the high-efficiency coal-saving agent for cement clinker calcination, comprising the following steps: (1) The aluminum powder, iron oxide powder, magnesium powder and glass powder are mixed evenly in proportion in a protective atmosphere and heated to above the melting temperature of the glass powder. After holding at the temperature, the mixture is cooled to room temperature. The resulting product is then mixed with isopropanol and ground to obtain the heating agent.

[0014] (2) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to hydrogen peroxide and ultrasonically dispersed to obtain the coal-saving agent.

[0015] Furthermore, in step (1), the heat preservation time is 10~20 min.

[0016] Further, in step (1), the ratio of the product to isopropanol is 1g: 3~6ml.

[0017] Furthermore, in step (2), the ultrasonic dispersion time is 5~10 min.

[0018] Finally, this invention discloses the application of the high-efficiency coal-saving agent for cement clinker calcination in pulverized coal. Optionally, the amount of the coal-saving agent added is not less than 3% of the mass of the pulverized coal.

[0019] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects: The coal-saving agent of this invention not only contains penetrants, catalysts, and leavening agents, which can effectively promote the combustion of pulverized coal and improve its thermal efficiency, but also uses hydrogen peroxide as the dispersion medium. This hydrogen peroxide can fully penetrate into the pulverized coal particles, decomposing at high temperatures to form oxygen and moisture. This oxygen allows for more complete combustion of the pulverized coal, reducing heat loss caused by incomplete combustion and also reducing smoke and dust emissions. Simultaneously, the moisture reacts with the carbonaceous material provided by the pulverized coal to form water gas, which releases a large amount of heat upon combustion. Furthermore, the oxygen and moisture formed after the decomposition of hydrogen peroxide are both clean substances, promoting the thermal efficiency of the pulverized coal without causing additional pollution. In addition, the coal-saving agent of this invention also contains a heating agent powder formed from aluminum powder, iron oxide powder, magnesium powder, and glass powder. When mixed with pulverized coal particles, the high heat generated by the combustion of the magnesium powder at high temperatures further triggers an aluminothermic reaction in the aluminum powder and iron oxide powder, releasing a large amount of heat with a calorific value significantly higher than that of pulverized coal, thus maintaining a high temperature while reducing the amount of pulverized coal used. Furthermore, the ejection effect generated by the aforementioned aluminothermic reaction promotes the dispersion of pulverized coal particles, breaks down the solidified pulverized coal, and allows it to come into contact with oxygen for combustion, thus improving the combustion efficiency of the pulverized coal. Simultaneously, the iron formed by the aluminothermic reaction has a sulfur-fixing effect, reducing the emission of sulfur oxide gases caused by pulverized coal combustion. Another product of the aluminothermic reaction, alumina, also promotes sulfur fixation. This is because the acidic sites of alumina can adsorb sulfur oxide gases, and since the iron and alumina are co-occurring, the iron more easily captures these sulfur oxide gases and reacts, converting the sulfur oxide gases into sulfate ions for fixation. Additionally, the iron oxide powder also has a sulfur-fixing effect. Therefore, the heating agent of this invention not only reduces the amount of pulverized coal used but also utilizes its products and reactants to reduce sulfur oxide gas emissions, thus reducing environmental pollution. Furthermore, because the heating agent of this invention uses melted and then cooled glass powder to solidify the components together, the intensity of the aluminothermic reaction is effectively reduced, allowing the reaction between the aluminum powder and iron oxide powder to last longer, improving the utilization efficiency of the heating agent, and further reducing the amount of pulverized coal used. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 The following is a diagram of a heating agent sample prepared in Example 1; Figure 2 The image shows a sample of the coal-saving agent prepared in Example 1 below. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer.

[0023] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as those skilled in the art. All reagents and raw materials used in this invention are readily available through conventional means, and unless otherwise specified, they shall be used in accordance with conventional methods in the art or as per the product instructions.

[0024] Furthermore, any methods and materials similar to or equivalent to those described herein can be applied to the method of this invention. The preferred embodiments and materials described in this invention are for illustrative purposes only. The technical solution of this invention will now be further described in conjunction with specific embodiments.

[0025] Example 1 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, ferric oxide powder, magnesium powder, and glass powder (melting temperature approximately 420-450℃) are mixed and stirred evenly, wherein: the mass ratio of aluminum powder to ferric oxide powder is 1:5, the magnesium powder is 17% of the total mass of aluminum powder and iron oxide powder, and the glass powder is 14% of the total mass of aluminum powder and ferric oxide powder. Then, the mixture is heated to 500℃ in an argon atmosphere at a heating rate of 10℃ and held for 10 minutes, then cooled to room temperature. The resulting product is crushed and mixed with isopropanol at a ratio of 1g:5ml, then ground. After completion, it is dried and sieved to obtain a 30-50 mesh heating agent (e.g., Figure 1 (As shown), for later use.

[0026] (2) Take the following components: 13 parts by weight of penetrant (sodium dodecyl sulfonate), 10 parts by weight of dispersant (sodium tripolyphosphate), 25 parts by weight of catalyst (zinc chloride), 11 parts by weight of leavening agent (sodium chloride), 40 parts by weight of the heating agent prepared in this embodiment, and 65 parts by weight of hydrogen peroxide with a mass fraction of 30%.

[0027] (3) After adding the penetrant, dispersant, catalyst, leavening agent, and heating agent to hydrogen peroxide, ultrasonically disperse for 8 minutes to obtain the coal-saving agent, such as... Figure 2 As shown.

[0028] The coal-saving agent prepared in this embodiment was added to the pulverized coal at a ratio of 4% by mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without any coal-saving agent) were tested. The coal-saving rate was calculated as: (R2-R1) / R2, where R1 is the grate speed when using the coal-saving agent for stable heating, and R2 is the grate speed of the blank group for stable heating. The emission reduction rate was calculated as: (M2-M1) / M2, where M2 is the mass of sulfur oxides emitted by the blank group, and M1 is the mass of sulfur oxides emitted when using the coal-saving agent. The results are shown in the table below.

[0029] Example 2 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, ferric oxide powder, magnesium powder and glass powder (melting temperature about 475~510℃) are mixed and stirred evenly, wherein: the mass ratio of aluminum powder to ferric oxide powder is 1:7, the magnesium powder is 20% of the total mass of aluminum powder and iron oxide powder, and the glass powder is 16% of the total mass of aluminum powder and ferric oxide powder. Then the mixture is heated to 540℃ in an argon atmosphere at a heating rate of 10℃ and held for 20min, and then cooled to room temperature. The obtained product is crushed and mixed with isopropanol at a ratio of 1g:6ml and then ground. After completion, it is dried and sieved to obtain a 30~40 mesh heating agent for later use.

[0030] (2) Take the following components: 10 parts by weight of penetrant (isooctanol polyoxyethylene ether), 7 parts by weight of dispersant (sodium dodecylbenzene sulfonate), 20 parts by weight of catalyst (ferric sulfate), 9 parts by weight of leavening agent (sodium lignosulfonate), 30 parts by weight of the heating agent prepared in this embodiment, and 60 parts by weight of hydrogen peroxide with a mass fraction of 35%.

[0031] (3) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to hydrogen peroxide and then ultrasonically dispersed for 5 minutes to obtain the coal-saving agent.

[0032] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 3% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0033] Example 3 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, iron oxide powder, magnesium powder and glass powder (melting temperature about 490~530℃) are mixed and stirred evenly, wherein: the mass ratio of aluminum powder to iron oxide powder is 1:4, the magnesium powder is 12% of the total mass of aluminum powder and iron oxide powder, and the glass powder is 15% of the total mass of aluminum powder and iron oxide powder. Then the mixture is heated to 560℃ in an argon atmosphere at a heating rate of 10℃ and held for 15min, and then cooled to room temperature. The obtained product is crushed and mixed with isopropanol at a ratio of 1g:3ml and then ground. After completion, it is dried and sieved to obtain a 30~50 mesh heating agent for later use.

[0034] (2) Take the following components: 20 parts by weight of penetrant (dodecyltrimethylammonium chloride), 15 parts by weight of dispersant (sodium pyrophosphate), 23 parts by weight of catalyst (titanium trichloride), 13 parts by weight of leavening agent (sodium bicarbonate), 48 parts by weight of the heating agent prepared in this embodiment, and 70 parts by weight of hydrogen peroxide with a mass fraction of 20%.

[0035] (3) After adding the penetrant, dispersant, catalyst, leavening agent and heating agent into hydrogen peroxide, ultrasonically disperse for 10 minutes to obtain the coal-saving agent.

[0036] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 6% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without adding any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0037] Example 4 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, ferric oxide powder, magnesium powder and glass powder (melting temperature about 420~450℃) are mixed and stirred evenly, wherein: the mass ratio of aluminum powder to ferric oxide powder is 1:5, the magnesium powder is 17% of the total mass of aluminum powder and iron oxide powder, and the glass powder is 14% of the total mass of aluminum powder and ferric oxide powder. Then the mixture is heated to 500℃ in an argon atmosphere at a heating rate of 10℃ and held for 10min, and then cooled to room temperature. The obtained product is crushed and mixed with isopropanol at a ratio of 1g:5ml and then ground. After completion, it is dried and sieved to obtain a 30~50 mesh heating agent for later use.

[0038] (2) Take the following components: 13 parts by weight of penetrant (sodium dodecyl sulfonate), 10 parts by weight of dispersant (sodium tripolyphosphate), 25 parts by weight of catalyst (zinc chloride), 11 parts by weight of leavening agent (sodium chloride), 40 parts by weight of the heating agent prepared in this embodiment, and 65 parts by weight of water.

[0039] (3) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to clean water and ultrasonically dispersed for 8 minutes to obtain the coal-saving agent.

[0040] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 4% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0041] Example 5 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Take the following components: 20 parts by weight of penetrant (dodecyltrimethylammonium chloride), 15 parts by weight of dispersant (sodium pyrophosphate), 23 parts by weight of catalyst (titanium trichloride), 13 parts by weight of leavening agent (sodium bicarbonate), and 70 parts by weight of hydrogen peroxide with a mass fraction of 20%.

[0042] (2) The penetrant, dispersant, catalyst and bulking agent are added to hydrogen peroxide and ultrasonically dispersed for 10 minutes to obtain the coal-saving agent.

[0043] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 6% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without adding any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0044] Example 6 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Mix ferric oxide powder, magnesium powder and glass powder (melting temperature about 420~450℃) and stir evenly, wherein: the magnesium powder is 17% of the mass of ferric oxide powder and the glass powder is 14% of the mass of ferric oxide powder. Then heat the mixture to 500℃ in an argon atmosphere at a heating rate of 10℃ and hold for 10min, then cool to room temperature, crush the obtained product and mix it with isopropanol at a ratio of 1g:5ml and then grind it. After completion, dry and sieve to obtain a 30~50 mesh heating agent for later use.

[0045] (2) Take the following components: 13 parts by weight of penetrant (sodium dodecyl sulfonate), 10 parts by weight of dispersant (sodium tripolyphosphate), 25 parts by weight of catalyst (zinc chloride), 11 parts by weight of leavening agent (sodium chloride), 40 parts by weight of the heating agent prepared in this embodiment, and 65 parts by weight of hydrogen peroxide with a mass fraction of 30%.

[0046] (3) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to hydrogen peroxide and then ultrasonically dispersed for 8 minutes to obtain the coal-saving agent.

[0047] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 4% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0048] Example 7 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, magnesium powder and glass powder (melting temperature about 475~510℃) are mixed and stirred evenly, wherein: the magnesium powder is 20% of the mass of aluminum powder and the glass powder is 16% of the mass of aluminum powder. The mixture is then heated to 540℃ in an argon atmosphere at a heating rate of 10℃ and held for 20min. After cooling to room temperature, the resulting product is crushed and mixed with isopropanol at a ratio of 1g:6ml and then ground. After completion, it is dried and sieved to obtain a 30~40 mesh heating agent for later use.

[0049] (2) Take the following components: 10 parts by weight of penetrant (isooctanol polyoxyethylene ether), 7 parts by weight of dispersant (sodium dodecylbenzene sulfonate), 20 parts by weight of catalyst (ferric sulfate), 9 parts by weight of leavening agent (sodium lignosulfonate), 30 parts by weight of the heating agent prepared in this embodiment, and 60 parts by weight of hydrogen peroxide with a mass fraction of 35%.

[0050] (3) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to hydrogen peroxide and then ultrasonically dispersed for 5 minutes to obtain the coal-saving agent.

[0051] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 3% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0052] Example 8 A process for preparing a high-efficiency coal-saving agent for cement clinker calcination includes the following steps: (1) Aluminum powder, iron oxide powder and glass powder (melting temperature about 490~530℃) are mixed and stirred evenly, wherein the mass ratio of aluminum powder to iron oxide powder is 1:4, and the glass powder is 15% of the total mass of aluminum powder and iron oxide powder. The mixture is then heated to 560℃ in an argon atmosphere at a heating rate of 10℃ and held for 15 minutes, and then cooled to room temperature. The resulting product is crushed and mixed with isopropanol at a ratio of 1g:3ml and then ground. After completion, it is dried and sieved to obtain a 30~50 mesh heating agent for later use.

[0053] (2) Take the following components: 20 parts by weight of penetrant (dodecyltrimethylammonium chloride), 15 parts by weight of dispersant (sodium pyrophosphate), 23 parts by weight of catalyst (titanium trichloride), 13 parts by weight of leavening agent (sodium bicarbonate), 48 parts by weight of the heating agent prepared in this embodiment, and 70 parts by weight of hydrogen peroxide with a mass fraction of 20%.

[0054] (3) After adding the penetrant, dispersant, catalyst, leavening agent and heating agent into hydrogen peroxide, ultrasonically disperse for 10 minutes to obtain the coal-saving agent.

[0055] The coal-saving agent prepared in this embodiment was added to the coal powder at a ratio of 6% of the coal powder mass. After mixing evenly, its coal-saving rate and sulfur oxide (calculated as sulfur dioxide and sulfur trioxide) emission reduction rate relative to the blank group (without adding any coal-saving agent) were tested. The calculation method was the same as in Example 1 above, and the results are shown in the table below.

[0056] 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency coal-saving agent for cement clinker calcination, characterized in that, It comprises the following components: 10-20 parts by weight of penetrant, 7-15 parts by weight of dispersant, 20-25 parts by weight of catalyst, 9-13 parts by weight of leavening agent, 30-48 parts by weight of heating agent, and 60-70 parts by weight of hydrogen peroxide; wherein: The heating agent is a powder formed by the solidification of aluminum powder, iron oxide powder, magnesium powder, and glass powder. The mass ratio of aluminum powder to iron oxide powder is 1:4~7; the magnesium powder accounts for 12~20% of the total mass of aluminum powder and iron oxide powder, and the glass powder accounts for 14~16% of the total mass of aluminum powder and iron oxide powder. The penetrant includes any one of isooctanol polyoxyethylene ether, dodecyltrimethylammonium chloride, sodium dodecyl sulfonate, and alkylphenol polyoxyethylene ether. The catalyst includes at least one of zinc chloride, titanium trichloride, cerium nitrate, ferric sulfate, and copper sulfate. The leavening agent includes at least one of sodium chloride, potassium chloride, sodium bicarbonate, and sodium lignosulfonate. The dispersant includes any one of polyoxyethylene ether, sodium dodecylbenzenesulfonate, sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate.

2. The high-efficiency coal-saving agent for cement clinker calcination according to claim 1, characterized in that, The iron oxide includes at least one of ferric oxide and iron(II) oxide.

3. The high-efficiency coal-saving agent for cement clinker calcination according to claim 1, characterized in that, The particle size of the heating agent is 30-50 mesh.

4. The high-efficiency coal-saving agent for cement clinker calcination according to claim 1, characterized in that, The hydrogen peroxide has a mass fraction of 20-35%.

5. The method for preparing the high-efficiency coal-saving agent for cement clinker calcination according to any one of claims 1-4, characterized in that, Includes the following steps: (1) The aluminum powder, iron oxide powder, magnesium powder and glass powder are mixed evenly in proportion in a protective atmosphere and heated to above the melting temperature of the glass powder. After holding at the temperature, the mixture is cooled to room temperature. The resulting product is then mixed with isopropanol and ground to obtain the heating agent. (2) The penetrant, dispersant, catalyst, leavening agent and heating agent are added to hydrogen peroxide and ultrasonically dispersed to obtain the coal-saving agent.

6. The method for preparing the high-efficiency coal-saving agent for cement clinker calcination according to claim 5, characterized in that, In step (1), the ratio of the product to isopropanol is 1g: 3~6ml.

7. The method for preparing the high-efficiency coal-saving agent for cement clinker calcination according to claim 5, characterized in that, In step (1), the heat preservation time is 10~20 min.

8. The method for preparing the high-efficiency coal-saving agent for cement clinker calcination according to any one of claims 5-7, characterized in that, In step (2), the ultrasonic dispersion time is 5~10 min.

9. The high-efficiency coal-saving agent for cement clinker calcination as described in any one of claims 1-4, or the coal-saving agent obtained by the preparation method described in any one of claims 5-8, in pulverized coal.

10. The application according to claim 9, characterized in that, The amount of the coal-saving agent added shall not be less than 3% of the mass of the coal powder.

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