Cement grinding aid preparation method

Technical Field

The invention belongs to the field of cement production, in particular to a process for the preparation of cement grinding aid.

Background Art

In a cement grinding aid is added to the cement pulverizing process a mill to effect gets up helps cement without compromising the performance of the additive, the mixing amount of generally 1% the following. The mill can be changed and the dispersibility of the internal material between the velocity of flow of the cement, the conveying efficiency of the cement, cement fine particles and effectively eliminate the electrostatic adsorption and bao Qiuhu wear phenomenon, the output of the grinder can be improved up to 20% the left and right, at the same time effectively reduce the phenomenon of assured, toughen optimized cement, cement residue is reduced. Composite grinding aid also contains the fly ash, ore powder and other cement mixed the material gets up excitation of the exciting potential active role, so as to increase the strength to improve the cement when the mixing amount of the mixed cement production, reduce the mixing amount of clinker, greatly save limestone the consumption of resources, reduce the production cost. Use of cement grinding aid can also the water and grinding [...] grinding is not changed under the situation of time, the annual production and increasing labor, expand the scale of production, reduce the power consumption of the tons of cement, reduce the production cost.

Most of the cement grinding aid presence armaturen complex, high cost, troublesome processing, improves the energy consumption and cost of cement production, reduces the per unit time of the output and the quality of cement, and the cement grinding aid in existing chlorine, alkali ion, chlorine ion in the cement clinker and residue in, will accelerate reinforced corrosion, alkali ion will make the cement setting occurs, caking and water requirement increase, the concrete surface and frosting.

From this it can be seen, the prior art and the need to be further improved.

Content of the invention

The invention, in order to prevent the above-mentioned the defects of the prior art, provides a method for the preparation of cement grinding aid.

The technical proposal adopted by the invention is:

A process for the preparation of cement grinding aid, comprising the following steps:

(1), preparation of the raw material, the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 8%-13%, 3%-5%, 1.5%-2.5%, 0.7%-1.4%, 1.5%-2.5%, 75%-85% with percentages of the weight of the;

(2), the heating and stirring of the raw material, the above-mentioned raw materials in quantitative move to the reactor, heating to 30 the -35 the [...][...] , stirring 30-60 minutes;

(3), the above-mentioned processed by heating and stirring the raw material to room temperature, discharging packaging.

Said step (1) in ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and the percentage of the weight of the water 9%, 3.5%, 1.7%, 0.8%, 1.8%, 83.2% ; said step (2) the heating temperature is in the 32 [...] , the stirring time is 35 minutes.

Said step (1) in ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c alkanolamine the percentage of the weight of the water and 10%, 4%, 2%, 1%, 2%, 81% ; said step (2) the heating temperature is in the 33 [...] , the stirring time is 40 minutes.

Said step (1) in ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and the percentage of the weight of the water 11%, 3.8%, 1.9%, 1.2%, 2.1%, 80% ; said step (2) the heating temperature is in the 35 [...] , the stirring time is 50 minutes.

Said step (1) in ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and the percentage of the weight of the water 13%, 3%, 2.5%, 1.1%, 2.4%, 78% ; said step (2) the heating temperature is in the 31 [...] , the stirring time is 42 minutes.

Said step (1) in ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and the percentage of the weight of the water 12%, 3.6%, 2.4%, 1.2%, 1.8%, 79% ; said step (2) the heating temperature is in the 34 [...] , the stirring time is 60 minutes.

Due to the adoption of the above-mentioned technical scheme, the invention has the beneficial effect is:

1, the burden of the invention is simple, low cost, convenient processing, and the pores of the prepared by the present invention not containing cement grinding aid any chlorine , alkali ion, at the same time in the grinding aid strengthening of the traditional ordinary Portland cement grinding aid, alkali ion pair the damage brought about by the cement.

2, use the invention to prepare cement grinding aid, not only can reduce energy consumption and cost of the production of cement, and in unit time can be increased and the quality of the cement of the cement, the cement the powder rubs when added to the cement mill, a cement grinding station can be improved when the platform 15% or more, the production of the cement 3 days increased strength of 3 MPa or more, 28 days increased strength of 4 MPa or more.

Mode of execution

Below an embodiment of combining specific to the present invention further in detail, but the invention is not limited to these embodiments.

Embodiment 1: the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 9%, 3.5%, 1.7%, 0.8%, 1.8%, 83.2% compared with the weight of the carried out, and then the above-mentioned raw materials in quantitative move to the reactor, heating to 32 the [...] , stirring 35 minutes, cooling to room temperature discharging packaging. Prepared from this the physical properties of the cement grinding aid of as shown in the table below:

Embodiment 2: the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 10%, 4%, 2%, 1%, 2%, with the weight ratio of 81%, then the above-mentioned raw materials in quantitative move to the reactor, heating to 33 the [...] , stirring 40 minutes, cooling to room temperature discharging packaging. Prepared from this the physical properties of the cement grinding aid of as shown in the table below:

Embodiment 3: the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 11%, 3.8%, 1.9%, 1.2%, 2.1%, with the weight ratio of 80%, then the above-mentioned raw materials in quantitative move to the reactor, heating to 35 the [...] , stirring 50 minutes, cooling to room temperature discharging packaging. Prepared from this the physical properties of the cement grinding aid of as shown in the table below:

Embodiment 4: the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 13%, 3%, 2.5%, 1.1%, 2.4%, with the weight ratio of 78%, then the above-mentioned raw materials in quantitative move to the reactor, heating to 31 the [...] , stirring 42 minutes, cooling to room temperature discharging packaging. Prepared from this the physical properties of the cement grinding aid of as shown in the table below:

Embodiment 5: the ethylene glycol, carboxymethyl cellulose, carboxymethyl starch, sodium hexametaphosphate, three b c amine and water in accordance with 12%, 3.6%, 2.4%, 1.2%, 1.8%, to 79% with a weight ratio of, and then the above-mentioned raw materials in quantitative move to the reactor, heating to 34 the [...] , stirring 60 minutes, cooling to room temperature discharging packaging. Prepared from this the physical properties of the cement grinding aid of as shown in the table below:

From this it can be seen, use of the invention in the preparation of the process for the preparation of the cement grinding aid of the output is improved by 15% or more, 3d strength and 28d strength have very large lifting; preparation by the present invention not only can reduce the cement grinding aid of energy consumption and cost of the production of cement, but also can improve the cement production in the unit time and cement quality.

The need to further note that, as described herein a specific embodiment of the spirit of this invention is only an illustration of the. The invention belongs to the technical field of the technical staff to the specific embodiment described in a variety of modification or supplement to or a substitute in a similar manner, but will not deviate from the spirit of this invention or the right beyond the attached scope of the defined claims.