A cement raw material grinding aid mineralizer

Abstract

This invention discloses a cement raw meal grinding aid mineralizer, belonging to the technical field of cement admixture materials. It is prepared from the following raw materials in parts by weight: dispersing grinding aid component: 10-30 parts, decomposition accelerating component: 10-30 parts, coal combustion catalytic component: 10-20 parts, oxygenating component: 5-10 parts, stabilizing component: 0.1-0.5 parts, corrosion inhibitor component: 0.05-0.15 parts, and water: 20-60 parts. This cement raw meal mineralizer is composed of organic and inorganic functional materials and has grinding aid, decomposition accelerating, coal saving, and strength enhancement effects, making it a high-performance cement raw meal grinding aid mineralizer. By adding the raw meal mineralizer of this invention, the hourly output of the raw meal mill can be greatly increased, the amount of raw meal residue on the screen can be reduced, the specific surface area of ​​raw meal can be increased, the burnability of raw meal can be improved, and the standard coal consumption for clinker production can be reduced, resulting in excellent coal-saving effects. At the same time, it can improve the grindability of clinker, increase the hourly output of the cement mill, reduce the amount of cement residue on the 80um screen, increase the specific surface area of ​​cement, and improve cement performance.

Description

Technical Field

[0001] This invention relates to the field of cement admixture materials technology, specifically to a cement raw meal grinding aid mineralizer. Background Technology

[0002] Cement grinding aid mineralizers are chemical additives that improve the grinding effect and performance of raw meal, reduce coal consumption in clinker firing, and increase the strength of cement clinker. They can further enhance cement strength and hourly output, and improve cement adaptability, building upon the use of cement grinding aids. They are primarily used in cement clinker production enterprises. Adding mineralizers before the raw meal enters the mill, as needed, improves the grindability of the raw meal, increases the hourly output of the mill, and results in raw meal with better particle size distribution. This makes carbonates easier to decompose in the decomposer, significantly reducing coal consumption in the decomposer. The clinker can be fired at a relatively lower temperature in the kiln, resulting in clinker with better crystal morphology and activity, and ultimately, increased clinker strength.

[0003] The cement industry is a significant source of CO2 emissions. According to statistics, in 2021, the cement industry accounted for 13% of my country's total CO2 emissions and 22% of the total CO2 emissions from key industrial sectors under emission control, second only to the power industry at 32%. Achieving the "3060" target requires improvements in research and application from different perspectives, processes, and technologies across key industrial emission sectors.

[0004] The current cement market is fiercely competitive, and coal prices remain high for an extended period. Cement companies urgently need to optimize their energy consumption structure and reduce production costs through technological upgrades, the development and utilization of new products, and other means. Currently, coal costs account for more than 50% of the total clinker production cost in new dry-process kilns, making heat consumption a key factor determining a cement plant's competitiveness. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a cement raw meal grinding aid mineralizing agent composed of organic and inorganic functional materials. It possesses grinding aid, decomposition promotion, coal saving, and strength enhancement effects, making it a high-performance cement raw meal grinding aid mineralizing agent. By adding this raw meal mineralizing agent, the hourly output of the raw meal mill can be significantly increased, the raw meal screen residue can be reduced, the specific surface area of ​​the raw meal can be increased, the burnability of the raw meal can be improved, and the standard coal consumption for clinker production can be reduced, resulting in excellent coal saving effects. Simultaneously, it can improve the grindability of clinker, increase the hourly output of the cement mill, reduce the 80µm cement screen residue, increase the specific surface area of ​​the cement, and improve cement performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0008] Dispersing grinding aid component: 10-30 parts, decomposition promoting component: 10-30 parts, coal combustion catalytic component: 10-20 parts, oxygen-enriching component: 5-10 parts, stabilizing component: 0.1-0.5 parts, corrosion-preventing component: 0.05-0.15 parts, water: 20-60 parts.

[0009] Preferably, the cement raw material grinding aid is prepared from the following raw materials in parts by weight:

[0010] Dispersing grinding aid component: 15-25 parts, decomposition promoting component: 15-25 parts, coal combustion catalytic component: 13-17 parts, oxygen-enriching component: 6-9 parts, stabilizing component: 0.2-0.4 parts, corrosion-preventing component: 0.08-0.12 parts, water: 30-50 parts.

[0011] Preferably, the cement raw material grinding aid is prepared from the following raw materials in parts by weight:

[0012] Dispersing grinding aid component: 20 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts, water: 38 parts.

[0013] Preferably, the dispersing grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0014] Preferably, the decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0015] Preferably, the coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0016] Preferably, the oxygenating component is magnesium peroxide.

[0017] Preferably, the stabilizing component is emulsifier OP-1.

[0018] Preferably, the preservative component is sodium benzoate.

[0019] The beneficial technical effects of this invention are as follows:

[0020] The cement raw material mineralizer of the present invention is composed of organic and inorganic functional materials and has the effects of grinding aid, decomposition promotion, coal saving and strength enhancement. It is a high-performance cement raw material grinding aid mineralizer.

[0021] The dispersing and grinding aid component introduced in this invention is a composite of alkanolamine organic components, which has a better dispersing and grinding effect compared with single-component dispersing and grinding aid components. It changes the dispersibility of materials in the mill during raw material crushing and grinding, effectively eliminates the electrostatic adsorption of fine particles, optimizes particle size distribution, and increases the mill's hourly output. The decomposition-promoting component introduced in this invention is an organophosphonate component, which can change the crystal structure of carbonates, promote carbonate decomposition, and correspondingly reduce the decomposition temperature of carbonates in the decomposition furnace. Extensive experiments have optimized the use of HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1. The coal combustion catalytic component introduced in this invention is a rare earth oxide, which can improve the combustion efficiency of coal and reduce the amount of coal injected into the decomposition furnace under the same carbonate decomposition rate. The oxygen-enhancing component of this invention increases the oxygen content in the anaerobic environment at high temperatures. The stabilizing component of this invention maintains good stability and prevents precipitation and stratification. The anti-corrosion component of this invention prevents the solution from becoming moldy and deteriorating after long-term storage.

[0022] Adding the raw meal mineralizer of this invention can significantly increase the hourly output of the raw meal mill, reduce the amount of raw meal residue on the screen, and increase the specific surface area of ​​the raw meal; it can also improve the burnability of the raw meal, reduce the standard coal consumption for clinker production, and have excellent coal-saving effects; at the same time, it can improve the grindability of clinker, increase the hourly output of the cement mill, reduce the amount of cement residue on the 80um screen, increase the specific surface area of ​​the cement, and improve the performance of the cement. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] Example 1

[0025] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0026] Dispersing grinding aid component: 30 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts, water: 28 parts.

[0027] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0028] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0029] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0030] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0031] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0032] In this embodiment, the raw material grinding system is a vertical mill, and the calcination system is a 5000t / d new dry rotary kiln with a five-stage suspension preheater.

[0033] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 1 below.

[0034] Table 1

[0035]

[0036] Example 2

[0037] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0038] Dispersing grinding aid component: 10 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts, water: 48 parts.

[0039] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0040] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0041] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0042] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0043] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0044] In this embodiment, the raw material grinding system is a vertical mill, and the calcination system is a 5000t / d new dry rotary kiln with a five-stage suspension preheater.

[0045] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 2 below.

[0046] Table 2

[0047]

[0048] Example 3

[0049] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0050] Dispersing grinding aid component: 20 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts, water: 38 parts.

[0051] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0052] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0053] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0054] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0055] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0056] In this embodiment, the raw material grinding system is a vertical mill, and the calcination system is a 5000t / d new dry rotary kiln with a five-stage suspension preheater.

[0057] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 3 below.

[0058] Table 3

[0059]

[0060] The raw material grinding system in Examples 1-3 above is a vertical mill. Comparative experiments revealed that increasing the dosage of the dispersing and grinding aid component has a significant effect on increasing the mill's hourly output and reducing the residue on the 80µm sieve of raw material. Compared with the blank experiment, the corresponding indicators were significantly improved. Therefore, in the vertical mill system, the focus was on investigating the grinding and dispersion effect by changing the dosage of the dispersing and grinding aid component to determine the appropriate dosage. Examples 1-3 showed that a higher dosage of the dispersing and grinding aid component and a higher dosage of the mineralizer are both beneficial. However, from a cost-effectiveness and economic perspective, a dosage of 20 parts of dispersing and grinding aid component (0.1%) provides better cost-effectiveness.

[0061] Example 4

[0062] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0063] Dispersing grinding aid component: 20 parts, decomposition promoting component: 10 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts, water: 48 parts.

[0064] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0065] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0066] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0067] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0068] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0069] In this embodiment, the raw material grinding system is a 1800*1200mm roller press final grinding system, and the calcination system is a 4000t / d new dry rotary kiln with a five-stage suspension preheater.

[0070] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 4 below.

[0071] Table 4

[0072]

[0073] Example 5

[0074] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0075] Dispersing grinding aid component: 20 parts, decomposition promoting component: 30 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.1 parts, corrosion-preventing component: 0.05 parts, water: 28 parts.

[0076] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0077] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0078] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0079] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0080] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0081] In this embodiment, the raw material grinding system is a 1800*1200mm roller press final grinding system, and the calcination system is a 4000t / d new dry rotary kiln with a five-stage suspension preheater.

[0082] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 5 below.

[0083] Table 5

[0084]

[0085] Example 6

[0086] A cement raw material grinding aid mineralizer is prepared from the following raw materials in parts by weight:

[0087] Dispersing grinding aid component: 20 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.15 parts, water: 38 parts.

[0088] The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:1.

[0089] The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 3:2:1.

[0090] The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:1.

[0091] The oxygenating component is magnesium peroxide. The stabilizing component is an emulsifier. The anti-corrosion component is sodium benzoate.

[0092] The cement raw material grinding aid mineralizer can be obtained by accurately measuring and adding the above components into the reaction vessel and stirring evenly.

[0093] In this embodiment, the raw material grinding system is a 1800*1200mm roller press final grinding system, and the calcination system is a 4000t / d new dry rotary kiln with a five-stage suspension preheater.

[0094] At the production site, the raw material grinding aid mineralizer was uniformly dripped onto the raw material conveyor belt using a metering pump. The grinding time, raw material fineness, specific surface area, and power consumption were recorded. The standard coal consumption for clinker calcination and the decomposition furnace temperature were also recorded. The results are shown in Table 6 below.

[0095] Table 6

[0096]

[0097] The raw material grinding system in Examples 4-6 above is a roller press. Comparative experiments revealed that fixing the content of the dispersing grinding aid and changing its dosage did not significantly improve the mill's hourly output or reduce the 80µm sieve residue of the raw material. This is because the material's residence time in the roller press is extremely short, preventing the dispersing grinding aid from functioning effectively. However, increasing the dosage of the decomposition-promoting component had an excellent effect on reducing the temperature inside the decomposition furnace and standard coal consumption. Examples 4-6 showed that higher content and dosage of the decomposition-promoting component resulted in better effects on reducing decomposition temperature and standard coal consumption. From a cost-effectiveness and economic perspective, a dosage of 20 parts of dispersing decomposition-promoting component at 0.1% yielded better cost-effectiveness. At this dosage, the carbonate decomposition temperature inside the decomposition furnace decreased by 15°C, and the standard coal consumption of the clinker decreased by 4 kg / t, demonstrating good economic benefits.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A cement raw material grinding aid mineralizer, characterized in that, It is prepared from the following raw materials in parts by weight: Dispersing grinding aid component: 20 parts, decomposition promoting component: 20 parts, coal combustion catalytic component: 15 parts, oxygen-enriching component: 7 parts, stabilizing component: 0.3 parts, corrosion-preventing component: 0.1 parts; The dispersing and grinding aid component is obtained by mixing triethanolamine, polymeric polyol, and molasses in a mass ratio of 2:5:

1. The decomposition-promoting component is obtained by mixing HEDP, PBTCA, and ferrous sulfate in a mass ratio of 2:2:

1. The coal-fired catalytic component is obtained by mixing cerium oxide and lanthanum oxide in a mass ratio of 1:

1. The oxygenating component is magnesium peroxide; The stabilizing component is an emulsifier; The anti-corrosion component is sodium benzoate.

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