阅读说明：本技术 一种复合水泥助磨剂的制备方法 (Preparation method of composite cement grinding aid ) 是由 刘少林 刘俊杰 田帅 廖文文 凌志 邓凯 于 2020-08-13 设计创作，主要内容包括：本发明公开了一种复合水泥助磨剂的制备方法,涉及水泥助磨剂技术领域,所述水泥助磨剂的具体制备方法包括以下步骤：S101原料准备；S102制备混合液A；S103制备混合液B；S104制备助磨剂。本发明水泥助磨剂原料易得,制备方法简单,成本较低,且不含有氯离子,无毒无副作用,安全环保,本发明通过不同原料的协同作用以及合理配置,能够有效改善水泥的性能,提高其台时产量,增加其易磨性,助磨效果显著,有效提高水泥的产量和质量。(The invention discloses a preparation method of a composite cement grinding aid, relating to the technical field of cement grinding aids, wherein the concrete preparation method of the cement grinding aid comprises the following steps: s101, preparing a raw material; s102, preparing a mixed solution A; s103, preparing a mixed solution B; s104, preparing a grinding aid. The cement grinding aid disclosed by the invention is easy to obtain raw materials, simple in preparation method, low in cost, free of chloride ions, free of toxic and side effects, safe and environment-friendly, and can effectively improve the performance of cement, increase the machine-hour yield, increase the grindability, have an obvious grinding aid effect and effectively improve the yield and quality of cement by virtue of the synergistic effect and reasonable configuration of different raw materials.)

1. A preparation method of a composite cement grinding aid is characterized by comprising the following steps: the concrete preparation method of the cement grinding aid comprises the following steps:

s101, preparation of raw materials: weighing triethanolamine, polyalcohol, molasses, sodium acetate, sodium sulfate, calcium bicarbonate, modified lignin, surfactant, inorganic dispersion material and deionized water as required raw materials according to the weight part ratio for later use;

s102, preparing a mixed solution A: sequentially adding triethanolamine, polyol and molasses into a reaction kettle, adding deionized water into the reaction kettle, heating to 30-35 ℃, carrying out magnetic stirring, adding sodium acetate, sodium sulfate and calcium bicarbonate, mixing, and stirring uniformly to obtain a mixed solution A;

s103, preparing a mixed solution B: sequentially adding modified lignin, a surfactant and an inorganic dispersing material into the mixed solution A, carrying out magnetic stirring, heating to 35-45 ℃, and carrying out heat preservation for 20-30 min to obtain a mixed solution B;

s104, preparing a grinding aid: and adding the mixed solution B into the mixed solution A for three times, stirring while adding until the mixed solution is uniformly stirred, naturally cooling, and filtering to obtain the cement grinding aid product.

2. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: the cement grinding aid in the step S101 comprises the following raw material components in parts by weight: 30-50 parts of triethanolamine, 20-30 parts of polyol, 10-15 parts of molasses, 6-10 parts of sodium acetate, 5-9 parts of sodium sulfate, 3-7 parts of calcium bicarbonate, 5-15 parts of modified lignin, 4-6 parts of surfactant, 3-5 parts of inorganic dispersion material and the balance of deionized water.

3. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: and in the step S102, deionized water is added in two times, wherein the deionized water is added for the first time and then is magnetically stirred for 10-15 min, and the deionized water is added for the second time and then is magnetically stirred for 15-20 min.

4. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: and the temperature of the magnetic stirring in the step S104 is kept at 40-45 ℃.

5. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: the modified lignin is prepared by the following method:

s201: taking lignin, adding water with the weight being 10-15 times of that of the lignin, and uniformly mixing to obtain a lignin solution;

s202: and adding a silane coupling agent into the lignin solution, and carrying out ultrasonic treatment for 20-30 min to obtain the modified lignin.

6. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: the inorganic dispersion material is any one of sodium polyphosphate or sodium hexametaphosphate.

7. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: the surfactant is any one of sodium methylsulfonate, polysorbates, fatty glyceride or fatty sorbitan.

8. The method for preparing the composite cement grinding aid according to claim 1, which is characterized in that: the polyalcohol is any one or mixture of more of ethylene glycol, glycerol and sorbitol.

Technical Field

The invention relates to the technical field of cement grinding aids, in particular to a preparation method of a composite cement grinding aid.

Background

In the grinding process of cement clinker, a small amount of additional substances (liquid or solid substances) are added, so that the grinding efficiency can be obviously improved or the energy consumption can be reduced, and the additional substances of the chemical additive which do not damage the performance of cement are generally called cement grinding aids. The cement grinding aid can obviously improve the machine hour output of cement, the strength of cement at each age and the fluidity of the cement.

However, the composite cement grinding aid in the current market has the disadvantages of complex preparation process, more raw materials, higher production cost, lower machine-hour yield, unstable grinding aid effect, chlorine ion content, harm to human body and incapability of meeting the requirements of the current market. Therefore, the technical personnel in the field provide a preparation method of the composite cement grinding aid to solve the problems in the background technology.

Disclosure of Invention

The invention aims to provide a preparation method of a composite cement grinding aid, which is simple to operate and low in cost, and the composite cement grinding aid prepared by the preparation method can effectively improve the performance of cement, improve the machine-hour yield, increase the grindability, has a remarkable grinding aid effect, does not contain chloride ions, has no toxic or side effect, is safe and environment-friendly, and solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a composite cement grinding aid comprises the following steps:

s101, preparation of raw materials: weighing triethanolamine, polyalcohol, molasses, sodium acetate, sodium sulfate, calcium bicarbonate, modified lignin, surfactant, inorganic dispersion material and deionized water as required raw materials according to the weight part ratio for later use;

s102, preparing a mixed solution A: sequentially adding triethanolamine, polyol and molasses into a reaction kettle, adding deionized water into the reaction kettle, heating to 30-35 ℃, carrying out magnetic stirring, adding sodium acetate, sodium sulfate and calcium bicarbonate, mixing, and stirring uniformly to obtain a mixed solution A;

s103, preparing a mixed solution B: sequentially adding modified lignin, a surfactant and an inorganic dispersing material into the mixed solution A, carrying out magnetic stirring, heating to 35-45 ℃, and carrying out heat preservation for 20-30 min to obtain a mixed solution B;

s104, preparing a grinding aid: and adding the mixed solution B into the mixed solution A for three times, stirring while adding until the mixed solution is uniformly stirred, naturally cooling, and filtering to obtain the cement grinding aid product.

As a further scheme of the invention: the cement grinding aid in the step S101 comprises the following raw material components in parts by weight: 30-50 parts of triethanolamine, 20-30 parts of polyol, 10-15 parts of molasses, 6-10 parts of sodium acetate, 5-9 parts of sodium sulfate, 3-7 parts of calcium bicarbonate, 5-15 parts of modified lignin, 4-6 parts of surfactant, 3-5 parts of inorganic dispersion material and the balance of deionized water.

As a still further scheme of the invention: and in the step S102, deionized water is added in two times, wherein the deionized water is added for the first time and then is magnetically stirred for 10-15 min, and the deionized water is added for the second time and then is magnetically stirred for 15-20 min.

As a still further scheme of the invention: and the temperature of the magnetic stirring in the step S104 is kept at 40-45 ℃.

As a still further scheme of the invention: the modified lignin is prepared by the following method:

s201: taking lignin, adding water with the weight being 10-15 times of that of the lignin, and uniformly mixing to obtain a lignin solution;

s202: and adding a silane coupling agent into the lignin solution, and carrying out ultrasonic treatment for 20-30 min to obtain the modified lignin.

As a still further scheme of the invention: the inorganic dispersion material is any one of sodium polyphosphate or sodium hexametaphosphate.

As a still further scheme of the invention: the surfactant is any one of sodium methylsulfonate, polysorbates, fatty glyceride or fatty sorbitan.

As a still further scheme of the invention: the polyalcohol is any one or mixture of more of ethylene glycol, glycerol and sorbitol.

Compared with the prior art, the invention has the beneficial effects that: the invention discloses a preparation method of a composite cement grinding aid, which has the advantages of easily obtained raw materials, simple preparation method, low cost, no chloride ions, no toxicity, no side effect, safety and environmental protection.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 of the 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.

In the embodiment of the present invention, the first and second substrates,