CN115140963A - Raw material activation energy-saving auxiliary agent for cement production and application thereof - Google Patents
Raw material activation energy-saving auxiliary agent for cement production and application thereof Download PDFInfo
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- CN115140963A CN115140963A CN202210754933.4A CN202210754933A CN115140963A CN 115140963 A CN115140963 A CN 115140963A CN 202210754933 A CN202210754933 A CN 202210754933A CN 115140963 A CN115140963 A CN 115140963A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Abstract
The invention provides a raw material activation energy-saving auxiliary agent for cement production and application thereof, and relates to the technical field of cement additives. The paint comprises the following components in parts by weight: 10-30 parts of acetic acid, 10-30 parts of sodium hydroxide, 0.5-3 parts of sodium fluoride, 2-10 parts of molasses, 10-30 parts of dispersing agent and 50-150 parts of water. The invention designs a high-quality raw material activation energy-saving auxiliary agent by only using acetic acid, sodium hydroxide, sodium fluoride, molasses, a dispersing agent and water as raw materials through formula combination and dosage adjustment. The problems of high energy consumption of raw material grinding step, easy agglomeration of ground materials, poor grinding efficiency, poor raw material burnability, high clinker coal consumption and the like in the prior art are effectively solved. The invention also provides a cement raw meal grinding treatment scheme with low energy consumption, high quality and obvious economic benefit: the cement production cost can be effectively reduced, the performance of the ground product can be improved, and the coal-saving and electricity-saving effects of clinker production can be improved only by activating the designed high-quality raw material energy-saving auxiliary agent and combining the grinding process and the quality control standard.
Description
Technical Field
The invention belongs to the technical field of cement additives, and particularly relates to a raw material activation energy-saving auxiliary agent for cement production and application thereof.
Background
The cement is a powdery hydraulic inorganic cementing material, can be made into plastic slurry after being added with a proper amount of water, can be hardened in air and water, and has wide application scenes. Moreover, the cement can also firmly bond sand, stone and other materials together, for example, the cement is used as a cementing material; sand and stone are used as aggregate; the cement concrete can be obtained by mixing with water according to a certain proportion and stirring, and after hardening, the cement concrete not only has higher strength, but also can resist the erosion of the salt water of the fresh water river.
With the vigorous development of the construction industry, cement is one of the most important cementing materials and is widely applied to engineering of civil construction, water conservancy, national defense and the like for a long time.
However, due to the limitation of production process, cement production is an industry with low energy utilization rate and high energy consumption. Specifically, the cement production process is called two-mill one-firing for short, namely raw material grinding, large kiln calcination and cement grinding, wherein the raw material grinding is a process link with higher energy consumption in the cement production process, nearly 95% of energy in the raw material grinding process disappears as heat dissipation, when the fineness of the raw material is refined to a certain degree, the grinding condition is worsened due to the agglomeration phenomenon of fine particles, and the grinding efficiency is sharply reduced.
Moreover, the raw material grinding step is used as a basic link in the cement production process, and has important influence on the subsequent production links. For example, in the subsequent clinker firing process, the quality of the grain composition after grinding the raw meal can affect the dispersibility of the raw meal, the combustibility of the raw meal, the coal consumption, the power consumption, the quality and the pollutant emission of the clinker, which are all major items of the quality and the cost of the clinker, and the use effect of the raw meal activation energy-saving auxiliary agent can greatly improve the quality and the economic benefit due to the superposition effect of the grinding of the raw meal and the firing of the clinker.
Therefore, the optimization of the raw material grinding process has important production significance and is a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a raw material activation energy-saving auxiliary agent for cement production, which is a high-quality raw material activation energy-saving auxiliary agent designed by only using acetic acid, sodium hydroxide, sodium fluoride, molasses, a dispersing agent and water as raw materials through formula combination and dosage adjustment. The problems of high energy consumption of raw material grinding step, easy agglomeration of ground materials, poor grinding effect, poor raw material burnability, high coal consumption of clinker production and the like in the prior art can be effectively solved.
The components used in the invention are all selected from easily purchased raw materials in the prior art, and the invention has the effects of low price, wide sources, greenness, safety and the like. Can effectively reduce the cost of producing the energy-saving auxiliary agent, improve the reaction safety, reduce the problems of environmental pollution and the like in the operation process.
In order to realize the aim, the invention provides a raw material activation energy-saving auxiliary agent for cement production, which comprises the following components in parts by weight: 10-30 parts of acetic acid, 10-30 parts of sodium hydroxide, 0.5-3 parts of sodium fluoride, 2-10 parts of molasses, 10-30 parts of dispersant and 50-150 parts of water.
In a preferred embodiment, the composition comprises the following components in parts by weight: 15-25 parts of acetic acid, 12-16 parts of sodium hydroxide, 0.5-3 parts of sodium fluoride, 4-6 parts of molasses, 15-25 parts of dispersant and 60-125 parts of water.
In a preferred embodiment, the composition comprises the following components in parts by weight: 20 parts of acetic acid, 14 parts of sodium hydroxide, 1 part of sodium fluoride, 5 parts of molasses, 20 parts of a dispersing agent and 100 parts of water.
In a preferred embodiment, the dispersant comprises one or more of glycerol, triethanolamine, diethanolamine, monoethanolamine, diethylene glycol, ethylene glycol, propylene glycol.
The invention also aims to provide the application of the raw material activation energy-saving auxiliary agent for cement production, and the prepared production energy-saving activation auxiliary agent is used as a processing auxiliary agent to be uniformly mixed with raw materials and then subjected to grinding treatment.
The invention combines the designed high-quality raw material activation energy-saving auxiliary agent formula with the grinding process and the quality control standard, and can optimize the cement raw material grinding treatment scheme with low energy consumption, high quality and remarkable economic benefit. Effectively reduces the production cost of cement, improves the performance of ground products, improves the coal-saving and electricity-saving effects, and further reaches the process standard of cost reduction and efficiency improvement.
In order to realize the purpose, the invention provides an application of a raw material activation energy-saving auxiliary agent for cement production, which specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, a dispersing agent and water according to a proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, uniformly mixing the mixed auxiliary agent obtained in the step S1 with the cement raw material to obtain a mixture;
and S3, grinding the mixture obtained in the step S2 in a mill to obtain a raw material grinding product.
In a preferred embodiment, in step S2, the cement raw material is a raw material known to those skilled in the art, and refers to a cement raw material before the first grinding in the two-grinding and one-burning cement preparation process. The cement raw materials can comprise calcareous raw materials, clayey raw materials and correcting raw materials; the calcareous material can be at least one selected from limestone, marl, chalk, shell and coral; the clayey raw material may be at least one selected from loess, clay, shale, mudstone, siltstone and silt; the calibration raw material may be at least one selected from the group consisting of iron ore, copper slag, sandstone, and river sand.
In a preferred embodiment, in step S2, the mass ratio of the mixing aid to the cement raw meal is (0.05% -0.2%): 1.
in a preferred embodiment, in step S2, the mass ratio of the mixing aid to the cement raw meal is 0.15%:1.
in a preferred embodiment, in step S3, the fineness of grind control index is 13 ± 2% of 0.08mm screen residue, and 0.2mm screen residue is less than 1.5%.
In a preferred embodiment, after the grinding in step S3 is completed, the average machine hour output of the mill can reach 372 tons, and the particle size distribution D of the raw meal grinding product 50 8.25-9.12 μm, the proportion of particles less than 3 μm is 22.52-22.95%, the proportion of particles more than or equal to 200 μm is 1.12-1.5%, and the specific surface area can reach 432m 2 /g。
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. in the invention, only acetic acid, sodium hydroxide, sodium fluoride, molasses, dispersant and water are used as raw materials, and all the materials are easy to obtain, low in price, wide in source and high in safety. Wherein, the acetic acid can increase the surface activity of the raw material; the sodium hydroxide is beneficial to reducing the emission of sulfur dioxide in the production process and neutralizing acidic raw materials while improving the grinding effect; the sodium fluoride is beneficial to improving the solid-phase reaction process of the materials; the molasses and the dispersant can increase the lubricating effect, but the dosage needs to be accurately controlled, the product of the raw material grinding can be agglomerated or coarse, and the effect of improving the grindability of the raw material is difficult to achieve due to too small dosage, so the additive amounts of the molasses and the dispersant are respectively designed to be 2-10 parts and 10-30 parts.
2. The invention designs a high-quality raw material activation energy-saving auxiliary agent by formula combination and dosage adjustment. The problems of high energy consumption of raw material grinding step, easy agglomeration of ground materials, poor grinding effect, poor burnability and the like in the prior art can be effectively solved.
3. The invention also provides a grinding process and a quality control standard in the cement production step. By combining the raw material activation energy-saving auxiliary agent designed by the invention, the cement raw material grinding treatment scheme with low energy consumption and high quality can be obviously optimized. The cement grinding process has the advantages of reducing the production cost of cement, improving the performance of raw material grinding products, along with good environmental protection performance, coal saving, electricity saving and low energy consumption, and further designs the cement grinding process standard with the effects of cost reduction and efficiency improvement.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments for better understanding of the present invention by those skilled in the art, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
The embodiment of the invention provides a raw material activation energy-saving auxiliary agent for cement production and application thereof, and solves the technical problems of high energy consumption, poor grinding effect, poor burnability and high calcination energy consumption in the grinding of cement raw materials in the prior art.
The technical scheme of the application is explained in detail by specific embodiments as follows:
the technical means used in the present invention are conventional means well known to those skilled in the art, and various raw materials, reagents, instruments, equipment and the like used in the present invention can be commercially available or can be prepared by existing methods, if not specifically indicated.
In the present invention, the parts by weight may be in units of weight known in the art, such as μ g, mg, g, kg, etc., or multiples thereof, such as 1/10, 1/100, 10, 100, etc.
Example 1
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 10 parts of acetic acid, 10 parts of sodium hydroxide, 1 part of sodium fluoride, 3 parts of molasses, 14 parts of glycerol and 60 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, glycerol and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.15%:1, uniformly mixing to obtain a mixture;
and S3, putting the mixture obtained in the step S2 into a grinding mill for treatment, wherein the grinding fineness control index is 13 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Example 2
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 30 parts of acetic acid, 20 parts of sodium hydroxide, 3 parts of sodium fluoride, 8 parts of molasses, 28 parts of glycerol and 150 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, glycerol and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.15%:1, uniformly mixing to obtain a mixture;
and S3, performing grinding treatment on the mixture obtained in the step S2, wherein the grinding fineness control index is 13 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Example 3
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 20 parts of acetic acid, 18 parts of sodium hydroxide, 1 part of sodium fluoride, 5 parts of molasses, 17 parts of glycerol and 120 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, glycerol and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.15%:1, uniformly mixing to obtain a mixture;
and S3, performing grinding treatment on the mixture obtained in the step S2, wherein the grinding fineness control index is 13 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Example 4
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 15 parts of acetic acid, 13 parts of sodium hydroxide, 2 parts of sodium fluoride, 5 parts of molasses, 20 parts of diethylene glycol and 100 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, diethylene glycol and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.1%:1, uniformly mixing to obtain a mixture;
and S3, performing grinding treatment on the mixture obtained in the step S2, wherein the grinding fineness control index is 13 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Example 5
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 20 parts of acetic acid, 18 parts of sodium hydroxide, 3 parts of sodium fluoride, 5 parts of molasses, 25 parts of triethanolamine and 130 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, triethanolamine and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.2%:1, uniformly mixing to obtain a mixture;
and S3, performing grinding treatment on the mixture obtained in the step S2, wherein the grinding fineness control index is 12 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Comparative example 1
The formula of the raw material activating energy-saving auxiliary agent for cement production comprises the following components: 20 parts of acetic acid, 18 parts of sodium hydroxide, 1 part of sodium fluoride, 5 parts of molasses, 17 parts of glycerol and 120 parts of water.
The application of the raw material activation energy-saving auxiliary agent for cement production specifically comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, glycerol and water according to the proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, mixing the mixed auxiliary agent obtained in the step S1 with cement raw meal according to the mass ratio of 0.2%:1, uniformly mixing to obtain a mixture;
and S3, performing grinding treatment on the mixture obtained in the step S2, wherein the grinding fineness control index is 13 +/-2% of 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5%, so that a raw material grinding product is obtained.
Comparative example 2
The cement raw material is directly ground without adding any raw material activation energy-saving auxiliary agent, the grinding fineness control index is 13 plus or minus 2 percent of the 0.08mm screen residue, and the 0.2mm screen residue is less than 1.5 percent, thus obtaining the raw material grinding product.
The production processes and the properties of the raw material pulverized products of comparative examples 1 to 5 and comparative examples 1 to 2 were compared, and the results are shown in Table 1.
TABLE 1
Results and discussion:
1. the energy-saving raw material activating auxiliary agent can effectively improve the yield of the mill
According to the grinding fineness control index provided by the invention, the yield increasing effect of the raw material activating energy-saving auxiliary agent in a raw material system is obvious. The raw material activating energy-saving auxiliary agent is added into a raw material system, so that static electricity can be obviously eliminated, the dispersibility of raw material particles is improved, the micro-fine powder aggregation phenomenon of a grinding system is favorably improved, and the V-separation scattering effect is improved, so that the powder separation efficiency of the powder separator is improved, the cyclic load is reduced, and the time-for-machine effect of the grinding machine is improved.
Meanwhile, the dispersibility of the raw material particles is improved, which is beneficial to improving the heat exchange between the raw material entering the preheater and the hot flue gas and improving the gas-solid separation efficiency in the cyclone. As can be seen from the mill test data: before the fineness control index is adjusted, the maximum yield is increased by 38t/h, the power consumption per ton of raw material is reduced by 1.2Kwh/t, and the effect is obvious.
2. Coal-saving effect of raw material activating energy-saving auxiliary agent
Under the same experimental conditions, compared with the comparative example 2 without adding the raw material activation energy-saving additive, the example 3 with the addition of the raw material activation energy-saving additive has the advantages that the clinker coal consumption of the kiln system is obviously reduced, and the reduction of the average clinker coal consumption per ton is more than 4 kilograms.
From the analysis of the particle size distribution data, the addition and non-addition of the raw material activation energy-saving additive are compared, and after the addition of the raw material activation energy-saving additive is found, D 50 The reduction from 11.28 to 8.42 is obviously 25 percent, the particle less than 32um is increased by 2.18 percent, the particle more than 80um is reduced by 1.8 percent, and the particle content more than 200um is also reduced by about 1 percent, which shows that the content of fine particles of raw materials is increased and the content of coarse particles of the raw materials is reduced after the raw material activating energy-saving auxiliary agent is added, thereby obviously facilitating the calcination of clinker in the cement production process, accelerating the solid phase reaction of the clinker, reducing the calcination temperature of the clinker, or reducing the content of f-CaO, and improving the yield of a kiln and the quality of the clinker.
And the raw material activation energy-saving auxiliary agent can also effectively improve the flowability of raw material particles of the tube mill and the vertical mill, and also can realize the improvement of the yield of the tube mill and the vertical mill and the improvement of raw materials entering a kiln on a kiln system.
3. Economic benefits are as follows:
the raw material system of the enterprise comprises a roller mill and a ball mill, the power consumption of the ball milling and grinding raw materials is obviously higher than that of the roller mill, and through the application of the raw material activation energy-saving auxiliary agent, in order to reduce the power consumption of the raw material grinding to the maximum extent, the raw material grinding by using less or stopping the ball mill is adopted, so that the power saving effect is especially obvious.
(1) The electricity-saving benefit is as follows: according to the calculation of 410t/h of raw material feeding of a kiln system, 9840t of raw materials are needed daily, after the raw material activation energy-saving auxiliary agent is added, the rolling speed of the grinding table is increased from 334t/h to 372t/h, and the valley electricity of the ball mill is reduced daily for 4.56 hours. The daily electricity-saving benefits of the raw material mill are as follows: 4.56h × 4200kwh (ball mill load) × 0.3124 yuan (valley electricity unit price) +372t/h × 24h 1.2kwh 0.5 yuan (average electricity unit price) =1.13 ten thousand yuan;
the raw material power consumption is saved each year: (4.56h × 4200kwh (ball mill load) +372t/h × 24h × 1.2kwh) =761.6 ten thousand kwh (at 70% operating rate);
(2) the cost of the energy-saving auxiliary agent for activating the daily raw material is as follows: 372t/h 24h 0.0015 (addition ratio) 2000 yuan (tax unit price) =2.68 ten thousand yuan;
if the long-time running trial shows that the coal saving per ton of clinker is more than (2.68-1.13) ten thousand/800 yuan (coal unit price)/6150 t (daily clinker) × 1000=3.15kg, the direct economic benefit is greater, and the continuous running application can be realized.
Besides direct economic benefits, if national carbon emission reduction requirements, indexes such as power coal and the like are comprehensively considered, and if the clinker yield or clinker strength improvement effect is considered, the method has higher social value and enterprise economic value.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The raw material activation energy-saving additive for cement production is characterized by comprising the following components in parts by weight: 10-30 parts of acetic acid, 10-30 parts of sodium hydroxide, 0.5-3 parts of sodium fluoride, 2-10 parts of molasses, 10-30 parts of dispersant and 50-150 parts of water.
2. The raw meal activation energy-saving additive for cement production as claimed in claim 1, comprising the following components in parts by weight: 15-25 parts of acetic acid, 12-16 parts of sodium hydroxide, 0.5-3 parts of sodium fluoride, 4-6 parts of molasses, 15-25 parts of dispersant and 60-125 parts of water.
3. The raw meal activation energy-saving additive for cement production as claimed in claim 2, comprising the following components in parts by weight: 20 parts of acetic acid, 14 parts of sodium hydroxide, 1 part of sodium fluoride, 5 parts of molasses, 20 parts of a dispersing agent and 100 parts of water.
4. The raw meal activation energy-saving additive for cement production as set forth in claim 1, wherein the dispersant comprises one or more of glycerol, triethanolamine, diethanolamine, monoethanolamine, diethylene glycol, ethylene glycol, propylene glycol, and the like.
5. The use of the energy-saving additive for activating raw meal for cement production as set forth in any one of claims 1 to 4, wherein the energy-saving additive is used as a processing aid and mixed with raw meal, and then subjected to a milling treatment.
6. The application of the raw meal activation energy-saving auxiliary agent for cement production as claimed in claim 5, which comprises the following steps:
s1, weighing acetic acid, sodium hydroxide, sodium fluoride, molasses, a dispersing agent and water according to a proportion, uniformly stirring, and preparing a mixed auxiliary agent;
s2, uniformly mixing the mixed auxiliary agent obtained in the step S1 with the cement raw material to obtain a mixture;
and S3, grinding the mixture obtained in the step S2 in a mill to obtain a raw material grinding product.
7. The application of the energy-saving additive for activating raw meal for cement production as claimed in claim 6, wherein in step S2, the mass ratio of the mixing additive to the cement raw meal is (0.05% -0.2%): 1.
8. the use of the raw meal activation energy-saving additive for cement production as set forth in claim 7, wherein in step S2, the mass ratio of the mixing additive to the cement raw meal is 0.15%:1.
9. the application of the raw meal activation energy-saving additive for cement production as claimed in claim 6, wherein in step S3, the fineness of grind control index is 13 ± 2% of 0.08mm screen residue, and 0.2mm screen residue is less than 1.5%.
10. The use of the raw meal activation energy-saving additive for cement production as claimed in claim 6, wherein after the milling in step S3 is completed, the average machine hour output of the mill can reach 372 tons, and the particle size distribution D of the product of the raw meal milling is such that 50 8.25-9.12 μm, the proportion of particles less than 3 μm is 22.52-22.95%, the proportion of particles more than or equal to 200 μm is 1.12-1.5%, and the specific surface area can reach 432m 2 /g。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115745460A (en) * | 2022-12-21 | 2023-03-07 | 洛阳奥百思特水泥技术有限公司 | Energy-saving additive for cement raw material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115745460A (en) * | 2022-12-21 | 2023-03-07 | 洛阳奥百思特水泥技术有限公司 | Energy-saving additive for cement raw material and preparation method and application thereof |
| CN115745460B (en) * | 2022-12-21 | 2023-07-28 | 洛阳奥百思特水泥技术有限公司 | Cement raw material energy-saving auxiliary agent and preparation method and application thereof |
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