CN113636777A

CN113636777A - Slag grinding aid and preparation method thereof

Info

Publication number: CN113636777A
Application number: CN202010347834.5A
Authority: CN
Inventors: 曾国斌
Original assignee: Nanjing Shenbi Building Materials Technology Co ltd
Current assignee: Nanjing Shenbi Building Materials Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-11-12

Abstract

The invention discloses a slag grinding aid and a preparation method thereof, wherein the slag grinding aid is prepared from the following raw materials in percentage by mass: 15% -25% of water, 38% -42% of polyethanolamine, 12% -16% of sodium adipate, 8% -12% of amino modified silicone, 10% -20% of polyethylene glycol, 0.5% -1.5% of a coupling agent, 0.5% -1.5% of an activator 5 type and 0.5% -1.5% of an activator 6 type. Has the advantages that: the slag grinding aid can eliminate static electricity in the slag grinding process, avoid the phenomenon of powder ball wrapping, and improve the grindability of slag particles, thereby improving the slag grinding efficiency, improving the machine-hour output of a grinding machine, and simultaneously having the function of improving the activity index of mineral powder.

Description

Slag grinding aid and preparation method thereof

Technical Field

The invention relates to the technical field of grinding aids, in particular to a slag grinding aid and a preparation method thereof.

Background

Slag is a granular active material formed by quenching a melt containing calcium silicate and calcium aluminate as main components discharged during iron making with water and quenching the melt. Generally contains 80-90% of glass phase, and the main minerals of the glass phase are dicalcium silicate (C2S), gehlenite (C2AS), akermanite (C2MS2), anorthite (CAS2) and the like. The chemical components of the slag are generally 35-45% of CaO, 225-40% of SiO, 36-15% of Al2O and 0.5-1% of FeO. The larger the mass coefficient of the slag (CaO + MgO + Al2O3)/(SiO2+ MnO + TiO2), the higher the activity of the slag, i.e., the higher the activity of the slag with high CaO and Al2O3 contents and low SiO2 contents.

The slag high-activity micro powder prepared by grinding slag into fine powder becomes one of the indispensable important materials in the process of preparing high-strength, high-performance and high-corrosion-resistant concrete at present. In a concrete system, the slag micro powder replaces cement according to a certain proportion, so that the performance of the concrete can be obviously improved, the single-side production cost of the concrete can be obviously reduced, and good economic benefit can be obtained. The slag micropowder is introduced into the concrete, so that the hydration heat can be obviously reduced, the chemical shrinkage and cracking can be effectively inhibited, the construction performance (such as fluidity, workability, pumpability and the like) and the durability of the concrete can be improved, the alkali-aggregate reaction (AAR) can be prevented, the anti-permeability, anti-freezing and anti-corrosion performance of the concrete can be improved, and the compactness degree and the structural strength of the concrete can be increased.

In actual industrial production, grinding is often assisted by adding grinding aids during the grinding process. However, static electricity is easily generated in the slag grinding process, so that the phenomenon of powder ball wrapping occurs, and the grinding efficiency is seriously influenced.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Aiming at the problems in the related art, the invention provides a slag grinding aid and a preparation method thereof, which aim to overcome the technical problems in the prior related art.

The technical scheme of the invention is realized as follows:

according to one aspect of the invention, a slag grinding aid is provided.

The slag grinding aid is prepared from the following raw materials in percentage by mass:

15% -25% of water, 38% -42% of polyethanolamine, 12% -16% of sodium adipate, 8% -12% of amino modified silicone, 10% -20% of polyethylene glycol, 0.5% -1.5% of a coupling agent, 0.5% -1.5% of an activator 5 type and 0.5% -1.5% of an activator 6 type.

Further, the coupling agent comprises the following raw material components: 0.2 to 0.5 percent of polydimethylsiloxane, 0.2 to 0.5 percent of phenyltriethoxysilane, and 0.1 to 0.5 percent of tetraethoxysilane.

Further, the activator 5 type comprises the following raw material components: 0.2 to 0.5 percent of isocyanate, 0.1 to 0.5 percent of carboxylate, 0.1 to 0.2 percent of sulfonate and 0.1 to 0.3 percent of acyl lactam.

Further, the activating agent type 6 comprises the following raw material components: 0.2 to 0.5 percent of glycerin, 0.2 to 0.5 percent of yeast basic group and 0.2 to 0.5 percent of biotin.

According to another aspect of the invention, a preparation method of the slag grinding aid is provided.

The preparation method of the slag grinding aid comprises the following steps:

weighing all raw materials required by the slag grinding aid according to the mass percentage;

mixing the weighed monoethanolamine, sodium adipate, amino modified silicone and polyethylene glycol to form a first mixture;

putting the mixture I into a preheated stirring kettle for stirring, and simultaneously adding water, isocyanate, sulfonate, acyl lactam, glycerol, yeast base and biotin to obtain a mixture II;

mixing and stirring the polydimethylsiloxane, the phenyltriethoxysilane and the tetraethoxysilane to obtain a mixture III;

and uniformly dividing the third mixture into three parts, and adding the third mixture into the second mixture for three times after the second mixture is uniformly mixed to obtain the grinding aid.

Further, when the first mixture is extracted, the first mixture is put into a pre-preheated stirring kettle for stirring, and the preheating temperature of the stirring kettle is 30-38 ℃.

Further, the stirring speed of the mixture II obtained above was 45 revolutions per minute.

Further, when the mixture three is added in three times, the interval time is one hour.

Furthermore, the temperature is increased to 40-45 ℃ in the stirring process of the grinding aid, and the stirring time is not less than four hours.

The raw material components adopted by the invention are explained as follows:

a polyethanolamine: colorless to light yellow transparent viscous liquid with slight ammonia smell, and becomes colorless to light yellow cubic crystal system crystal at low temperature. When exposed to air, the color gradually darkens. Is easily soluble in water, ethanol, acetone, glycerol, ethylene glycol, etc., is slightly soluble in benzene, diethyl ether, carbon tetrachloride, etc., and is hardly soluble in nonpolar solvents.

Sodium adipate: the material is stored in a sealed container and placed in a cool, dry place. The storage must be remote from the oxidant. Organic synthesis, medical intermediate, solvent and the like.

Amino-modified silicone: the Amino modified silicone has the foreign language name of Amino modified silicone, has stable performance, does not float oil or glue, is nontoxic, does not corrode or pollute the environment, can be used independently or can be mixed with other auxiliary agents for use.

Polyethylene glycol: the series products are non-toxic, non-irritant, slightly bitter in taste, good in water solubility and good in compatibility with a plurality of organic matter components. They have excellent lubricity, moisture retention, dispersibility, adhesives, antistatic agents, softeners and the like, and are widely applied in the industries of cosmetics, pharmacy, chemical fibers, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing, food processing and the like.

Polydimethylsiloxane: silicone oil, British name is Silicone oil, CAS number is 63148-62-9, molecular formula is C6H18OSi₂The polyorganosiloxane is a polyorganosiloxane with chain structures with different polymerization degrees. It is prepared through hydrolysis of dimethyldichlorosilane in water to obtain initial condensed ring body, cracking and rectifying to obtain low ring body, mixing the ring body, sealing agent and catalyst together to obtain various mixture with different polymerization degree, and vacuum distillation to eliminate low-boiling point matter to obtain silicone oil.

Phenyltriethoxysilane: used as a cross-linking agent of RTV silicon rubber and used as a raw material for preparing high molecular organic compounds.

Ethyl orthosilicate: tetraethoxysilane is a colorless liquid and is mainly used as a heat-proof coating, a chemical-resistant coating and an organic synthesis intermediate. Its melting point is-77 deg.C, boiling point is 165.5 deg.C, and it is slightly soluble in water, ethanol or diethyl ether. Used as heat-proof coating, chemical-resistant coating and organic synthesis intermediate. The phenolic aldehyde-butyronitrile cross-linking agent is used for improving heat resistance. Used as a crosslinking agent for silicone rubber in combination with dibutyltin dilaurate.

Isocyanate: isocyanates are a generic term for the various esters of isocyanic acid. When classified by the number of-NCO groups, the polyisocyanates include monoisocyanates R-N ═ C ═ O and diisocyanates O ═ C ═ N-R-N ═ C ═ O, polyisocyanates, and the like.

Carboxylic acid ester: dehydration of carboxylic acids with alcohols under acid catalysis or reaction of alcohols with acylating agents (acid chlorides, anhydrides) can be used for the preparation of esters.

Sulfonate ester: sulfonates, a class of compounds having the general formula R1SO2OR 2. Is a compound with a general formula of R1SO2OR 2. The preparation method is not usually prepared by the esterification reaction of sulfonic acid, and the sulfonyl chloride is used as a raw material and is a common and convenient preparation method. Often a low melting point solid. The reaction of an alcohol with it to give an ester can be used for identification.

Glycerol: the gas chromatography stationary liquid (the highest using temperature is 75 ℃, the solvent is methanol) is used for separating and analyzing low-boiling-point oxygen-containing compounds, amine compounds and nitrogen or oxygen heterocyclic compounds, can completely separate 3-methylpyridine (the boiling point is 144.14 ℃) and 4-methylpyridine (the boiling point is 145.36 ℃), and is suitable for analysis of aqueous solutions, solvents, gas meters, shock absorption liquid of hydraulic presses, softeners, nutrients for antibiotic fermentation, drying agents, lubricants, pharmaceutical industry, cosmetic preparation, organic synthesis and plasticizers. Can be dissolved in water at any ratio, and the low concentration glycerol solution can be used as lubricating oil for moistening skin (glycerine enema).

Yeast base: yeast is a unicellular fungus and is not a unit of phylogenetic classification. A micro-unicellular microorganism invisible to the naked eye, capable of fermenting sugar into alcohol and carbon dioxide, distributed throughout the natural world, is a typical heterotrophic facultative anaerobic microorganism, capable of surviving both aerobic and anaerobic conditions, and is a natural starter culture.

Biotin: biotin, also known as vitamin H, coenzyme R, is a water-soluble vitamin, also belonging to the vitamin B group, B7. It is an essential substance for the synthesis of vitamin C, an indispensable substance for the normal metabolism of fats and proteins. Is a nutrient necessary for maintaining the natural growth and development of human bodies and the normal function and health of human bodies.

The invention has the beneficial effects that: the slag grinding aid can eliminate static electricity in the slag grinding process, avoid the phenomenon of powder ball wrapping, and improve the grindability of slag particles, thereby improving the slag grinding efficiency, improving the machine-hour output of a grinding machine, and simultaneously having the function of improving the activity index of mineral powder.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a flow chart of a preparation method of a slag grinding aid according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

According to an embodiment of the invention, a slag grinding aid is provided.

Wherein, the coupling agent comprises the following raw material components: 0.2 to 0.5 percent of polydimethylsiloxane, 0.2 to 0.5 percent of phenyltriethoxysilane, and 0.1 to 0.5 percent of tetraethoxysilane.

The activator 5 type comprises the following raw material components: 0.2 to 0.5 percent of isocyanate, 0.1 to 0.5 percent of carboxylate, 0.1 to 0.2 percent of sulfonate and 0.1 to 0.3 percent of acyl lactam.

The activator 6 type comprises the following raw material components: 0.2 to 0.5 percent of glycerin, 0.2 to 0.5 percent of yeast basic group and 0.2 to 0.5 percent of biotin.

In order to clearly understand the technical scheme of the invention, the technical scheme of the invention is described in detail through specific examples.

Example one

18% of water, 39% of polyethanolamine, 14% of sodium adipate, 9% of amino modified silicone, 18% of polyethylene glycol, 0.8% of coupling agent, 0.8% of activator 5 type and 0.4% of activator 6 type.

Wherein, the coupling agent comprises the following raw material components: 0.3 percent of polydimethylsiloxane, 0.3 percent of phenyltriethoxysilane and 0.2 percent of tetraethoxysilane.

The activator 5 type comprises the following raw material components: 0.2% of isocyanate, 0.2% of carboxylate, 0.2% of sulfonate and 0.2% of acyl lactam.

The activator 6 type comprises the following raw material components: 0.1% of glycerol, 0.1% of yeast base and 0.2% of biotin.

The preparation method of the slag grinding aid comprises the following steps:

weighing 39g of polyethanolamine, 14g of sodium adipate, 9g of amino modified silicone and 18g of polyethylene glycol, and mixing to form a first mixture;

adding 18g of the mixture I into a preheated stirring kettle, stirring, and simultaneously adding 18g of water, 0.2g of isocyanate, 0.2g of carboxylate, 0.2g of sulfonate, 0.2g of acyl lactam, 0.1g of glycerol, 0.1g of yeast base and 0.2g of biotin to obtain a mixture II;

mixing and stirring 0.3g of polydimethylsiloxane, 0.3g of phenyltriethoxysilane and 0.2g of ethyl orthosilicate to obtain a mixture III;

Example two

20% of water, 40% of polyethanolamine, 14% of sodium adipate, 10% of amino modified silicone, 15% of polyethylene glycol, 1% of a coupling agent, 1% of an activator 5 type and 1% of an activator 6 type.

Wherein, the coupling agent comprises the following raw material components: 0.35% of polydimethylsiloxane, 0.35% of phenyltriethoxysilane and 0.3% of ethyl orthosilicate.

The activator 5 type comprises the following raw material components: 0.35% of isocyanate, 0.3% of carboxylate, 0.15% of sulfonate and 0.2% of acyl lactam.

The activator 6 type comprises the following raw material components: 0.35% of glycerol, 0.35% of yeast base and 0.3% of biotin.

The preparation method of the slag grinding aid comprises the following steps:

weighing 40g of polyethanolamine, 14g of sodium adipate, 10g of amino modified silicone and 15g of polyethylene glycol, and mixing to form a first mixture;

adding 20g of the mixture I into a preheated stirring kettle, stirring, and simultaneously adding 20g of water, 0.35g of isocyanate, 0.3g of carboxylate, 0.15g of sulfonate, 0.2g of acyl lactam, 0.35g of glycerol, 0.35g of yeast base and 0.3g of biotin to obtain a mixture II;

mixing and stirring 0.35g of polydimethylsiloxane, 0.35g of phenyltriethoxysilane and 0.3g of ethyl orthosilicate to obtain a mixture III;

EXAMPLE III

22% of water, 40% of polyethanolamine, 11% of sodium adipate, 11% of amino modified silicone, 14% of polyethylene glycol, 0.7% of a coupling agent, 0.7% of an activator type 5 and 0.6% of an activator type 6.

Wherein, the coupling agent comprises the following raw material components: 0.3 percent of polydimethylsiloxane, 0.3 percent of phenyltriethoxysilane and 0.1 percent of tetraethoxysilane.

The activator 5 type comprises the following raw material components: isocyanate 0.2%, carboxylate 0.2%, sulfonate 0.2% and acyllactam 0.1%.

The activator 6 type comprises the following raw material components: 0.2% of glycerol, 0.2% of yeast base and 0.2% of biotin.

The preparation method of the slag grinding aid comprises the following steps:

weighing 40g of polyethanolamine, 11g of sodium adipate, 11g of amino modified silicone and 14g of polyethylene glycol, and mixing to form a first mixture;

adding 22g of water, 0.2g of isocyanate, 0.1g of carboxylate, 0.1g of sulfonate, 0.1g of acyl lactam, 0.2g of glycerol, 0.2g of yeast base and 0.2g of biotin into a preheated stirring kettle for stirring to obtain a second mixture;

mixing and stirring 0.3g of polydimethylsiloxane, 0.3g of phenyltriethoxysilane and 0.1g of ethyl orthosilicate to obtain a mixture III;

For the convenience of understanding the above technical solution of the present invention, the following detailed description is made on the flow of the above solution of the present invention with reference to the accompanying drawings, and specifically is as follows:

according to the embodiment of the invention, the preparation method of the slag grinding aid is also provided.

As shown in figure 1, in the actual production process, the preparation of the slag grinding aid comprises the following steps:

s101, weighing all raw materials required by the slag grinding aid according to the mass percentage;

step S103, mixing the weighed monoethanolamine, sodium adipate, amino modified silicone and polyethylene glycol to form a first mixture;

step S105, putting the mixture I into a preheated stirring kettle for stirring, and simultaneously adding water, isocyanate, carboxylic ester, sulfonate, acyl lactam, glycerol, yeast base and biotin to obtain a mixture II;

step S107, mixing and stirring the polydimethylsiloxane, the phenyltriethoxysilane and the ethyl orthosilicate to obtain a mixture III;

and step S109, uniformly dividing the mixture III into three parts, and adding the mixture III into the mixture II for three times after the mixture II is uniformly mixed to obtain the grinding aid.

In one embodiment, when the first mixture is extracted, the first mixture is put into a pre-preheated stirring kettle for stirring, and the preheating temperature of the stirring kettle is 30-38 ℃.

In one embodiment, the second mixture obtained above is stirred at a speed of 45 rpm.

In one embodiment, the three times of adding the mixture are performed, wherein the interval time is one hour.

In one embodiment, the temperature is increased to 40-45 ℃ during the stirring process for obtaining the grinding aid, and the stirring time is not less than four hours.

In conclusion, by means of the technical scheme, the slag grinding aid is doped into the slag grinding aid, so that static electricity in the slag grinding process can be eliminated, the phenomenon of powder ball wrapping is avoided, the grindability of slag particles is improved, the grinding efficiency of slag is improved, the machine-hour yield of a grinding machine is improved, high-temperature-resistant grinding aid active functional groups are added under the action of improving the activity index of mineral powder, the performance of the grinding aid active functional groups is more suitable for being applied to cement and mineral powder vertical grinding, the machine-hour yield and the micro powder activity of the grinding machine can be obviously improved, and the production cost of micro powder enterprises is reduced. The high-temperature resistant and hard to decompose is suitable for high-temperature vertical milling; the static electricity and deflocculation function generated during grinding can be effectively eliminated; can complex heavy metal and radioactive isotope in the micro powder matrix and can increase the solubility thereof; the dispersion property of the particle surface can be changed, the hard structure of the slag glass body can be quickly damaged, and the surface energy of the material is reduced; has good adaptability with concrete admixture. The yield can be improved by 10-15% by using a vertical mill or a tube mill, and the activity of the mineral powder is improved by about 10%. Mixing amount: 0.03 to 0.04 percent. Grinding aid products with various mixing amounts can be designed according to grinding conditions, material chemical components and use habits of micro-powder enterprises. Meets the standard requirements of GB/T26748-2011 cement grinding aid.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The slag grinding aid is characterized by being prepared from the following raw materials in percentage by mass:

2. The slag grinding aid of claim 1, wherein the coupling agent comprises the following raw material components: 0.2 to 0.5 percent of polydimethylsiloxane, 0.2 to 0.5 percent of phenyltriethoxysilane, and 0.1 to 0.5 percent of tetraethoxysilane.

3. The slag grinding aid of claim 2, wherein the activator type 5 comprises the following raw material components: 0.2 to 0.5 percent of isocyanate, 0.1 to 0.5 percent of carboxylate, 0.1 to 0.2 percent of sulfonate and 0.1 to 0.3 percent of acyl lactam.

4. The slag grinding aid of claim 3, wherein the activator type 6 comprises the following raw material components: 0.2 to 0.5 percent of glycerin, 0.2 to 0.5 percent of yeast basic group and 0.1 to 0.5 percent of biotin.

5. A method for preparing a slag grinding aid, which is used for preparing the slag grinding aid of claim 4, and comprises the following steps:

adding the mixture I into a preheated stirring kettle, stirring, and simultaneously adding water, isocyanate, carboxylic ester, sulfonate, acyl lactam, glycerol, yeast base and biotin to obtain a mixture II;

6. The method for preparing slag grinding aid according to claim 5, wherein the first mixture is put into a pre-preheated stirring kettle for stirring during the extraction of the first mixture, and the preheating temperature of the stirring kettle is 30-38 ℃.

7. The method for preparing a slag grinding aid according to claim 5, wherein the stirring speed of the obtained mixture II is 45 rpm.

8. The method of claim 5, wherein the three additions of the mixture are performed in three separate times with an interval of one hour.

9. The method for preparing slag grinding aid according to claim 5, wherein the temperature is raised to 40-45 ℃ during the stirring process for obtaining the grinding aid, and the stirring time is not less than four hours.