阅读说明：本技术 一种高效水泥助磨剂及其制备方法 (Efficient cement grinding aid and preparation method thereof ) 是由 贾雷 刘子香 王海涛 于 2020-03-26 设计创作，主要内容包括：本发明公开了一种高效水泥助磨剂,包括改性聚合醇胺、糖蜜、木质素磺酸钠、工业盐和水,其中所述改性聚合醇胺占比设为5-15％,所述棉纶纤维占比设为8-12％,所述木质素磺酸钠占比设为1-3％,所述工业盐占比设为2-13％,所述水的占比设为25-70％。本发明是一种全新的聚合醇胺材料与其他功能材料混合后制备的产品,从分子结构上克服了传统水泥助磨剂的粉磨效率低、适用性差、成本高、对水泥强度提升不明显的缺点,同时这种新型聚合醇胺类的高效水泥助磨剂中的高分子醇胺分子对增强激发水泥早后期强度有明现的提升效果,水泥后期强度无倒缩现象,克服了传统助磨剂只能通过增加掺量来改善水泥强度的缺点。(The invention discloses a high-efficiency cement grinding aid, which comprises modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignosulphonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%. The invention is a brand-new product prepared by mixing a polyalcohol amine material and other functional materials, overcomes the defects of low grinding efficiency, poor applicability, high cost and unobvious improvement on the cement strength of the traditional cement grinding aid in terms of molecular structure, and simultaneously, macromolecule polyalcohol amine molecules in the novel polyalcohol amine type high-efficiency cement grinding aid have obvious improvement effect on enhancing the early and later strength of the excited cement, the later strength of the cement is not inverted and shrunk, and the defect that the cement strength can only be improved by increasing the mixing amount of the traditional grinding aid is overcome.)

1. The efficient cement grinding aid is characterized by comprising modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignosulphonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%.

2. The high-efficiency cement grinding aid as claimed in claim 1, further comprising the following specific ratio, wherein the ratio of the modified polyalcohol amine is 10%, the ratio of the cotton fiber is 10%, the ratio of the sodium lignosulfonate is 1%, the ratio of the industrial salt is 9%, and the ratio of the water is 70%.

3. The high efficiency cement grinding aid as claimed in claim 1, further comprising a specific ratio of 14% modified polyalcohol amine, 10% cotton fiber, 1% sodium lignosulfonate, 5% industrial salt and 70% water.

4. The method for preparing the high-efficiency cement grinding aid according to any one of claims 1 to 3, characterized in that the preparation steps comprise the following steps:

s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;

s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;

and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.

5. The method for preparing the high-efficiency cement grinding aid according to claim 4, wherein in the step S1, the drying is carried out by firstly carrying out cold air drying, using an air cooler for drying, controlling the drying time for 15min, then carrying out hot air drying, controlling the drying time for 12min, controlling the temperature for hot drying at 65-85 ℃, and finally carrying out natural cooling.

6. The method for preparing the high efficiency cement grinding aid as claimed in claim 4, wherein in step S3, the rotation speed of stirring is controlled at 380r/min 245-380r/min for 30min, and the temperature is controlled at normal temperature.

7. The efficient cement grinding aid as claimed in claim 1, wherein the modified polyalcohol amine is prepared by adding 100 parts of deionized water into a three-necked flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 with liquid alkali to obtain a modified polyalcohol amine mother liquor.

8. The efficient cement grinding aid as claimed in claim 7, wherein the percentage concentration of the liquid alkali is 42-76%, and the efficient cement grinding aid is prepared by fully mixing sodium hydroxide, calcium hypohalite and magnesium carbonate solutions according to the ratio of 1.4:1.5: 0.8.

9. The high efficiency cement grinding aid as claimed in claim 7, wherein the molecular weight of PEG is set to 600, the molecular weight of PPG is set to 1000, and the molecular weight of APEG is set to 1500.

Technical Field

The invention relates to the technical field of cement auxiliary chemical new materials, in particular to a high-efficiency cement grinding aid which respectively improves the 3d strength and the 28d strength of cement ground by adding the cement grinding aid of modified polyalcohol amine by more than 4MPa and 6MPa compared with the blank strength.

Background

The cement production is a high-energy-consumption process, and the grinding power consumption of the cement production process is the most important part of the total power consumption in the cement production process. The grinding aid is added into the grinding machine, so that the grinding state can be obviously improved, the grinding efficiency is improved, the activity of a cement mixed material can be excited, the utilization rate of industrial waste residues is improved, and the using amount of cement clinker is reduced. Therefore, the application of the cement grinding aid has great significance for realizing energy conservation and emission reduction in cement production in China.

Most of the existing cement grinding aids used at home and abroad mainly comprise single products or compound combined products of alcohol amine, polyols, lignin compounds, fatty acids, inorganic salts and the like, and the working principle of the cement grinding aid is that the cement grinding aid can eliminate the phenomena of fine powder adhesion and aggregation in the cement grinding process, accelerate the material grinding process, reduce grinding energy consumption, improve grinding efficiency and improve cement yield. However, the traditional cement grinding aid has the defects of high cost, poor product stability, single function and poor adaptability to cement production process, and is difficult to meet the requirements of 3d and 28d strength of cement in various cement plants at present, particularly high-grade cement, so that an efficient cement grinding aid and a preparation method thereof are provided.

Disclosure of Invention

The invention provides a high-efficiency cement grinding aid and a preparation method thereof, aiming at the defects in the background technology.

The invention adopts the following modified technical scheme that the efficient cement grinding aid comprises modified polyalcohol amine, molasses, sodium lignosulphonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is 5-15%, the proportion of the cotton fiber is 8-12%, the proportion of the sodium lignosulphonate is 1-3%, the proportion of the industrial salt is 2-13%, and the proportion of the water is 25-70%.

In a further preferred embodiment of the present invention, the modified polyalcohol amine ratio is 10%, the cotton fiber ratio is 10%, the sodium lignosulfonate ratio is 1%, the industrial salt ratio is 9%, and the water ratio is 70%.

In a further preferred embodiment of the present invention, the modified polyalcohol amine accounts for 14%, the cotton fiber accounts for 10%, the sodium lignosulfonate accounts for 1%, the industrial salt accounts for 5%, and the water accounts for 70%.

In a further preferred embodiment of the present invention, the production steps include the following:

s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;

s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;

and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.

As a further preferable mode of the present invention, in step S1, the drying is performed by first performing cold air drying, using an air cooler to perform drying, controlling the drying time for 15min, then performing hot air drying, controlling the drying time for 12min, controlling the temperature for hot drying at 65-85 ℃, and finally performing natural cooling.

In a further preferred embodiment of the present invention, in step S3, the rotation speed of stirring is controlled at 245-.

As a further preferable mode of the invention, the preparation of the modified polyalcohol amine comprises the steps of adding 100 parts of deionized water into a three-neck flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 by using liquid alkali to obtain a modified polyalcohol amine mother solution.

In a further preferred embodiment of the present invention, the percentage concentration of the caustic soda solution is 42 to 76%, and the sodium hydroxide solution, the calcium hypohalide solution and the magnesium carbonate solution are selected and mixed thoroughly in a ratio of 1.4:1.5: 0.8.

In a more preferred embodiment of the present invention, the molecular weight of the PEG is 600, the molecular weight of the PPG is 1000, and the molecular weight of the APEG is 1500.

The invention aims to provide a synthetic modified polyalcohol amine which is polymerized at normal temperature, has high reaction rate, simple process, easy control, low energy consumption, high production efficiency, no pollution in the synthetic process and good product quality, is a high-efficiency cement grinding aid after being mixed with a certain proportion of mixed materials, is not a high-efficiency cement grinding aid realized by simply and physically mixing a plurality of materials, is realized by obtaining a more stable novel high-molecular polyalcohol amine structure, achieves the innovation in principle, is a brand-new product prepared by mixing polyalcohol amine materials and other functional materials, overcomes the defects of low grinding efficiency, poor applicability, high cost and unobvious improvement on cement strength of the traditional cement grinding aid in the aspect of molecular structure, and simultaneously, high-molecular hydramine molecules in the novel high-efficiency cement grinding aid stimulate cement at early and later stages The strength has obvious improvement effect, the later strength of the cement has no phenomenon of reverse shrinkage, and the defect that the strength of the cement can be improved only by increasing the mixing amount of the traditional grinding aid is overcome.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a high-efficiency cement grinding aid comprises modified polyalcohol amine, molasses, sodium lignin sulfonate, industrial salt and water, wherein the proportion of the modified polyalcohol amine is set to be 5-15%, the proportion of the cotton fiber is set to be 8-12%, the proportion of the sodium lignin sulfonate is set to be 1-3%, the proportion of the industrial salt is set to be 2-13%, and the proportion of the water is set to be 25-70%.

The modified polyalcohol amine is 10%, the cotton fiber is 10%, the sodium lignosulfonate is 1%, the industrial salt is 9% and the water is 70%.

The modified polyalcohol amine is 14%, the cotton fiber is 10%, the sodium lignosulfonate is 1%, the industrial salt is 5% and the water is 70%.

The manufacturing steps comprise:

s1, preprocessing: preparing a clean three-mouth bottle with stirring, cleaning and drying the bottle, and preparing raw materials according to the weight ratio;

s2, pouring the raw material water into a three-mouth bottle, and keeping stirring continuously;

and S3, sequentially adding the modified polyalcohol amine, the molasses, the sodium lignin sulfonate and the industrial salt under stirring, and stirring for 30 minutes to obtain the cement grinding aid.

In step S1, the drying is carried out by cold air drying, the air cooler is used for drying, the drying time is controlled to be 15min, then the hot air drying is carried out, the drying time is controlled to be 12min, the temperature of the hot drying is controlled to be 65-85 ℃, and finally the natural cooling is carried out.

In step S3, the rotation speed of stirring is controlled at 245-380r/min for 30min, and the temperature is controlled at normal temperature.

The preparation method of the modified polyalcohol amine comprises the steps of adding 100 parts of deionized water into a three-neck flask with a stirrer and a thermometer, adding 10 parts of PEG, 15 parts of PPG, 15 parts of APEG, 10 parts of diethylenetriamine and 20 parts of triethanolamine under stirring, adding 1 part of hydrogen peroxide at 35 ℃ after the materials are dissolved, dropwise adding 1 part of mercaptopropionic acid and 1 part of aqueous solution within 1 hour, finally dropwise adding 5 parts of silane coupling agent, keeping the temperature at 40 ℃ for 2 hours, and adjusting the pH value to 7-9.5 by using liquid alkali to obtain the modified polyalcohol amine mother liquor.

The percentage concentration of the liquid caustic soda is 42-76%, and the liquid caustic soda is prepared by fully mixing sodium hydroxide, calcium hypohalite and magnesium carbonate solution according to the proportion of 1.4:1.5: 0.8.

The molecular weight of the PEG is set to 600, the molecular weight of the PPG is set to 1000, and the molecular weight of the APEG is set to 1500.