CN113121144A

CN113121144A - Flowing type cement grinding aid

Info

Publication number: CN113121144A
Application number: CN202110350148.8A
Authority: CN
Inventors: 岳琴; 陶从喜; 滕灼光; 周靖; 何坤富; 蔡礼明
Original assignee: China Resources Cement Technology R&D Co Ltd
Current assignee: China Resources Cement Technology R&D Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-07-16

Abstract

The invention discloses a flowing type cement grinding aid which comprises the following components in parts by weight: 10-80 parts of alcohol amine mixture, 5-30 parts of industrial salt additive, 5-50 parts of saccharide additive and 1-20 parts of surfactant containing hydrophilic groups. The invention modifies the surface of cement particles, improves the fluidity of cement powder and obviously reduces the caking phenomenon of cement during packaging and storage under the conditions of not influencing the quality of cement and not influencing the original functions of the grinding aid.

Description

Flowing type cement grinding aid

Technical Field

The invention relates to the technical field of cement production, in particular to a flowing type cement grinding aid.

Background

The cement warehouse is one of basic facilities of cement production enterprises, and cement in the warehouse is easy to adhere to the inner wall and accumulate at the bottom of the warehouse due to various reasons, so that the effective storage capacity is reduced, the discharging is not smooth, even the discharging is not possible, and the quality and the shipping efficiency of the factory cement are seriously influenced.

At present, the problems of cement depot collection and clearing are solved at home and abroad by making a contrivance in the aspect of developing mechanical depot clearing equipment. The mechanical cleaning consumes a large amount of manpower and material resources, the cement bond reservoir causes raw material loss, the subsequent treatment needs to be added for waste formed after the mechanical cleaning, and a large amount of manpower and material resources are consumed on the whole.

Large-scale cement enterprises forbid manual cleaning of the warehouse, and most of the existing cement plants need to clean and block a feed opening of the cement warehouse basically every day or every other day.

At present, cement admixtures in the market at home and abroad have the functions of improving cement grinding, increasing production, improving cement quality and the like. There is no admixture capable of improving the performance of cement powder by modifying the surface of cement particles in principle to prevent agglomeration.

Disclosure of Invention

The invention aims to: aiming at the problems mentioned in the background technology, the invention aims to improve the formula on the basis of the conventional grinding aid, and the flowing cement grinding aid provided by the invention not only has the functions of grinding aid, yield increase, consumption reduction and the like of the conventional grinding aid, but also can effectively solve the problem of cement agglomeration. The invention modifies the surface of cement particles, improves the fluidity of cement powder and reduces cement agglomeration under the conditions of not influencing the cement quality and the original functions of the grinding aid.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:

a flowing type cement grinding aid comprises the following components in parts by weight: 10-80 parts of alcohol amine mixture, 5-30 parts of industrial salt additive, 5-50 parts of saccharide additive and 1-20 parts of surfactant containing hydrophilic groups.

Further, the alcohol amine mixture comprises the following components in parts by weight: 5-20 parts of triethanolamine, 15-50 parts of modified isopropanolamine, 0-60 parts of triisopropanolamine and 0-60 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and uniformly stirring a plurality of kinds of alkanolamine.

Further, the industrial salt additive is one or a mixture of more of sodium thiocyanate, sodium phosphate, sodium chloride, calcium sulfate, calcium chloride, sodium sulfate and sodium nitrate.

Further, the sugar additive is one or more of white sugar, molasses and glucose.

Further, the surfactant comprises any one or more of cetyl trimethyl quaternary ammonium sodium bromide, sodium laurate, sodium oleate, sodium dodecyl benzene sulfonate, sodium hexadecyl sulfate, hydroxymethyl acrylate, hydroxyethyl acrylate, sodium methylene dinaphthalene sulfonate, fatty acid glyceride and alkyl glucoside.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

(1) the surface of cement particles is modified on the premise of not influencing the cement quality, so that the flowability of cement powder is effectively improved, and the caking phenomenon of cement in the storage and transportation processes is reduced.

(2) The cement base generally needs to dredge a feed opening of a cement storage, and needs to carry out storage cleaning operation once every two years, so that the safety risk is high, the working environment is poor, the cost is high, and the effect is not obvious.

(3) By adding the anti-caking additive and matching with a cement base to strengthen daily storage management, the problem of caking can be obviously relieved, and the number of the concrete bases is effectively reduced.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Example 1

A flowing type cement grinding aid comprises the following components in parts by weight: 45 parts of alcohol amine mixture, 5 parts of industrial salt additive and 5 parts of saccharide additive. The alcohol amine mixture comprises the following components in parts by weight: 10 parts of triethanolamine, 25 parts of modified isopropanolamine, 5 parts of triisopropanolamine and 5 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and stirring all the components uniformly.

Wherein the industrial salt additive is sodium chloride; the saccharide additive is molasses;

example 2

A flowing type cement grinding aid comprises the following components in parts by weight: 45 parts of alcohol amine mixture, 5 parts of industrial salt additive, 5 parts of saccharide additive and 1 part of surfactant containing hydrophilic groups. The alcohol amine mixture comprises the following components in parts by weight: 10 parts of triethanolamine, 25 parts of modified isopropanolamine, 5 parts of triisopropanolamine and 5 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and stirring all the components uniformly.

Wherein the industrial salt additive is sodium chloride; the saccharide additive is molasses; the surfactant is one of the surfactants.

Example 3

A flowing type cement grinding aid comprises the following components in parts by weight: 45 parts of alcohol amine mixture, 5 parts of industrial salt additive, 5 parts of saccharide additive and 2 parts of surfactant containing hydrophilic groups. The alcohol amine mixture comprises the following components in parts by weight: 10 parts of triethanolamine, 25 parts of modified isopropanolamine, 5 parts of triisopropanolamine and 5 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and stirring all the components uniformly.

Example 4

A flowing type cement grinding aid comprises the following components in parts by weight: 45 parts of alcohol amine mixture, 5 parts of industrial salt additive, 5 parts of saccharide additive and 3 parts of surfactant containing hydrophilic groups. The alcohol amine mixture comprises the following components in parts by weight: 10 parts of triethanolamine, 25 parts of modified isopropanolamine, 5 parts of triisopropanolamine and 5 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and stirring all the components uniformly.

Example 5

A flowing type cement grinding aid comprises the following components in parts by weight: 45 parts of alcohol amine mixture, 5 parts of industrial salt additive, 5 parts of saccharide additive and 5 parts of surfactant containing hydrophilic groups. The alcohol amine mixture comprises the following components in parts by weight: 10 parts of triethanolamine, 25 parts of modified isopropanolamine, 5 parts of triisopropanolamine and 5 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and stirring all the components uniformly.

The surfactants in the above examples are not limited to the listed components, and include all surfactants having a hydrophilic group at one end and a bulky group at the other end.

The grinding aid is adsorbed on the surface of cement particles by utilizing the surfactant for modification, one end of a hydrophilic group of the surfactant is adsorbed on the surface of the cement particles, and the steric hindrance between the cement particles is increased by a large group at the other end of the hydrophilic group of the surfactant, so that the dispersibility of the cement particles is increased, the flowability of the powder is enhanced, the transportation and the storage of the cement powder are facilitated, and the caking is prevented. And adding the surfactant which has a modification effect on the surfaces of the cement particles into the prepared grinding aid, and uniformly stirring to prepare the flowing cement admixture. The industrial mixing amount and the mixing point are the same as those of the common grinding aid, and no additional auxiliary equipment or operation is needed.

Preparing 4 groups of flowing cement grinding aids with different formulas according to examples 1-5, wherein the serial numbers of the flowing cement grinding aids are 2-5 in sequence, taking a part of common grinding aid on the market as the serial number 1, taking a cement raw material, and carrying out a test mill on the flowing cement grinding aid in a laboratory standard mill according to the mixing mode of the common grinding aid. Carrying out angle of repose detection on a cement sample prepared by a small test mill, and carrying out a whole set of physical property detection, wherein the scheme and data are shown in the following table:

the data show that the anti-caking reservoir cement grinding aid has a remarkable reduction on the cement powder repose angle, and is reduced by more than 4 degrees compared with a common grinding aid (the lower the powder repose angle is, the better the fluidity is), and the detection data of various physical properties of No. 2-5 experimental cement samples added with the flowing cement grinding aid have no obvious difference compared with the blank No. 1, which shows that the flowing cement admixture developed by the invention has no adverse effect on the physical properties of cement.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims

1. The flowing cement grinding aid is characterized by comprising the following components in parts by weight: 10-80 parts of alcohol amine mixture, 5-30 parts of industrial salt additive, 5-50 parts of saccharide additive and 1-20 parts of surfactant containing hydrophilic groups.

The flowing cement grinding aid as claimed in claim 1, wherein the alcohol amine mixture comprises the following components in parts by weight: 5-20 parts of triethanolamine, 15-50 parts of modified isopropanolamine, 0-60 parts of triisopropanolamine and 0-60 parts of monoethanol diisopropanolamine, wherein the alkanolamine mixture is prepared by directly mixing and uniformly stirring a plurality of kinds of alkanolamine.

2. The flow-type cement grinding aid as claimed in claim 1, wherein the industrial salt additive is one or more of sodium thiocyanate, sodium phosphate, sodium chloride, calcium sulfate, calcium chloride, sodium sulfate and sodium nitrate.

3. The flow-on cement grinding aid of claim 1, wherein the sugar additive is one or more of white sugar, molasses and glucose.

4. A flow-on cement grinding aid as claimed in claim 1 wherein the surfactant comprises any one or more of sodium cetyl trimethyl quaternary ammonium bromide, sodium laurate, sodium oleate, sodium dodecylbenzenesulfonate, sodium hexadecylsulfate, hydroxymethyl acrylate, hydroxyethyl acrylate, sodium methylenedinaphthalene sulfonate, fatty acid glycerides, alkyl glucosides.