SU607589A1 - Method of grinding portland-cement bricks and additives - Google Patents

Description

(54) METHOD FOR GRINDING FOR PORTLAND CEMENT CLINKER AND ADDITIVES

The invention relates to the measurement of building materials, in particular, can be used in the cement industry with the intensification of help for port-cement clinker and additives using surface-active substances.

In the cement industry, methods of porpandcement cement clinker and additives using a booster intensifier are known, in which grind intensifiers are introduced into the mill using a bootable pitakitsih mega device together with the help of the l products.

This method of entering the grinding mill intensifier does not provide a sufficiently high intensity of the measurement of the grinding products.

The closest to the technical essence is the method of grinding portport cement clinker and additives in a tube ball mill, including the introduction of a grinding intensifier — a surfactant by spraying into a 2J mill.

This method of help has some disadvantages. Spraying surfactant

In the mill mill, the total substance is produced along the entire length of the chamber for all fractions of the ground material found in it. This reduces the effectiveness of the additive and increases its consumption, since the adsorption of the surfactant additive is proportional to the specific surface area of the particles of the material to be ground. Increased consumption of surfactant can have a negative effect on the setting and hardening of cement, as well as reduce technical and economic indicators.

The purpose of the invention is to increase the efficiency of the grinding process and the economics of using a surfactant.

This is achieved by the fact that in the well-known method of grinding portport cement clinker and additives, including the introduction of a surfactant by spraying into a mill, the surfactant is fed at a site whose depth from the beginning of the mill mill reaches 0.75 to 1, 75 diameters of the string. This reasonably is based on the fact that the fractions of the crushed portpandcement cement cleker differ in different sizes due to physico-mineralogical and; structural features of clinker, as well as the mode of its burning and cooling. The clinker fractions of 1–5 mm have the highest grinding resistance. At the site of the mill, where the content of this fraction is maximum, the singing of the grinding process is observed; therefore, it is advisable to use a surface-active additive in this area. The method is carried out in a semi-industrial mill with a size of 1x7 m. A clinker of the Podilsky oiement plant and gypsum were taken for the help. A 10% solution of triethanolamvia was taken as a surfactant; the active substance was taken. The surfactant was sprayed using a spray nozzle of a known construction on a site whose length from the beginning of the drum of the menia was within the limits of

Characteristic mode pamopa

Grinding € without entering triethanolamine

Grinding with the introduction of O, O25- O, 3% triethanlamine on the entire surface of the crushed material of the first chamber

Grinding with the introduction of 0.01-0.15% of triethylamine in the zone difficult to grind () ractions

Grinding cement

11.1 302 O 50 474 35.4

8.3

3110 54 514

33.6

5.7 342 O 60 575

32.3 from 0.75 to 1.75 mill diameter, and where the dispersion of the comminuted material was 75-5% class + 80 µm, i.e. where the largest amount of the difficult to grind fraction is 1-5 mm. To obtain comparative data, grinding was carried out with the addition of a surfactant by spraying its solution onto the entire surface of the ground material of the first mill chamber and without introducing the surfactant. The performance of the measuring gear in all three cases was kept constant. During grinding, the fineness of the finished product and the specific energy consumption were recorded. The data obtained are given in the table. Directional input of the surfactant into the zone difficult to grind ({raction allows to reduce the consumption of the surfactant, increase the specific surface of the cement by 1 ~ 15% at the same time of grinding, as compared with the known method, and also reduce the specific energy consumption .

Claims (2)

The claims of the mill from the beginning of the drum are found in the Portland Cement Wedge Assist Method. Kera and. Additives in tubular ball mepyyin, Sources of information, taken in the case of the introduction of surface-active substances in the examination of: the substance by spraying into the mill, Fr. Copyright testimony of the USSR Whether by the fact, with the chain 252071, kn. B 02 C 23/00, 1968. increase the efficiency of the grinding process 2. Ro to S.M. and ar. Intensification neither is the economics of using the top-processes of fine grinding of clinker. the active substance, the supply of the last 10 with the help of surfactants it is carried out at a site whose length Cement, No. 5, 1964, 607589 Prepeps from 0.75 to 1.75 diameter stranded