SU948931A1 - Method for producing cement - Google Patents

Description

one

The invention relates to the production of silicate building materials, primarily to the production of portland cement tack.

A known method for the production of cement, including the grinding of clinker, gypsum stone, hydraulic additives and an intensifier grinding T

However, the method is characterized by insufficient strength characteristics of the cement.

The purpose of the invention is to increase the strength.

The goal is achieved by the fact that according to the method of cement production, including grinding of clinker, gypsum stone, hydraulic additive and grinding intensifier, first clinker is crushed, gypsum stone with an intensifier, and then home with a pre-ground additive.

The hydration rate of clinker minerals, their interaction with gypsum dissolved in water, milled particles of hydraulic additives, are influenced by the conditions of the primary contact of the components of the clinker mixture, gypsum, additives with the intensifier. In order to obtain the best results, the amount of intensifier supplied is 0.01-0, dry matter by weight of the charge.

Scrubber paste of alkyl sulfates and flotation agent VZhS — production waste from the Shebekinsky chemical plant, plasticizer adipine PA1C-1 waste production of caprolactam from the Shchekino production association Nitrogen and triethanolamine were selected as intensifiers.

For the production of cements, clinker of rotary kilns of the Stary Oskol cement plant is used; additives are granulated blast furnace slag and flask.

The chemical composition of the components is presented in table.1.

The cliquer and gypsum stone, in proportion to the dosage used, is ground with an intensifier of 60% of the total grinding time. During the same time, the additive is crushed. The components of the mixture prepared in this way are weighed in a predetermined ratio and home f # 3, Table 2).

In order to compare, the components of the cement mix in the received dosage are loaded into the mill, the intensifier is introduced and grind for a certain time (No. 2, Table 2).

A control cement was prepared by grinding all components without an intensifier.

Cements are prepared in a laboratory ball mill 0.5X2.8 m in size, while maintaining the constancy of the parameters: coefficient

filling the mill, the mass of the grinding bodies, the mass of the mixture of a certain chemical and particle size distribution and the operating time of the mill. Cements are prepared in three samples for tests at the age of 3.28 and 90 days.

The flexural strength and compression strength of standard samples are determined according to GOST 310.1-76-GOST 310 ..

The test results of the samples are given in table 2.

The use of the proposed method will improve the strength characteristics of the elements.

Table 1

Granulated blast furnace slag, 60%

Table 2 Note. 1-cement without

Claims (1)

Invention Formula A method of producing cement, including grinding clinker, gypsum stone, hydraulic additives and a grinding intensifier, characterized in that, in order to increase the strength, clinker is first crushed, gypsum stone with the Continuation Table. 2 tensifier, and then domalyvat 35 with pre-crushed additive. Sources of information, taken into account in the examination of 40 1. USSR author's certificate for application No. 2775599/33, cl. С 0 В 7/36, 05-06.79. intensifier; 2nd intensifier;