SU1675255A1 - Method of cement grinding - Google Patents

Abstract

The invention relates to the grinding of materials using grinding intensifiers; it can be used in the construction industry of Matenals to grind clinker and additives, as well as in other branches of the national economy: chemical, ore-dressing and naprochvleno to reduce the time of grinding, reducing costs . Electroplated water with pH 10-12 and water with pH 7 1-7.3 in the ratio (20-30) :( 70-80) are used as a grinding intensifier. The invention ensures that the specific surface of the cement portions by 17–20% is a reduction in the residue of an NC sieve HJ 10–15% with a cell size of 80 μm. increase the strength of cement stone by 27-35% at the age of 28 days.

Description

The invention relates to the modification / measurement of materials using grinding intensifiers and can be used in the building materials industry when grinding clinker and additives, as well as in other branches of the national economy - chemical, mining and processing.

The purpose of the invention is to reduce the time of grinding, reducing the cost

PRI me R. A three-chamber ball drum mill of 3. m is used as a grinding unit. Grinding is performed on clinker rotary kilns with the addition of 2% two-water gypsum and 20% granulated slag. An aqueous solution of latolyte with a pH of 10-12, obtained by activating ordinary water electrochemically with a redox potential of 700-1000 V. The resulting aqueous solution (catholyte) with pH

10-12 is diluted with water with a pH of 7.1-7.3 at a ratio of (20-30), respectively: (70-80).

Filing is carried out by spraying through the Fortune and / into the material during the mill operation at certain (equal) time intervals in an amount of 0.01 0.03% by weight of the material being crushed. To obtain a specific surface area of 300 m / kg, the grinding time during application as a grinding intensifier, 20% of kaulite and 80% of water with a pH of 7.3 should be 27 minutes with 30% of katolite, 70% of water, and a pH of 7.1-7.3 and 27.5 minutes; with 10% LSTM. 90% water and pH 7.1-7.3 (known) 32 min; at 10% catholyte, 90% water and pH 7.1–7.3 29 min: at 40% catholyte, 60% water and pH 7.1–7.3 34 min; at 100% Caholite 48 min; at 100% water 62 min.

Thus, the grinding time of cement to a specific surface of 300 m2 / kg with

about vi

ate to eat ate

using intensifier grinding on the proposed method 27-27,5 minutes The grinding time of cement to the same specific surface area of 300 m2 / kg using grinding as the intensifier according to a known method (10% LSTM, 90% water) is 32 minutes, i.e. 4.5-5 minutes (15-16%) more. This confirms the positive effect of applying the proposed grinding intensifier in comparison with the known. The use of catholyte with other concentrations as an intensifier for grinding is less effective.

After 28 minutes of grinding, the cement specific surface, when used as an intensifier, milled 20% catholyte and 80% water is 305 m / kg; 30% catholyte and 70% water 303 m2 / kg; (10% LSTM and 90% water, known) 280 m / kg; 10% catholyte and 90% water 290 m2 / kg; 40% catholyte and 60% water 270 m2 / kg.

The cost of 1 ton of an aqueous solution of a known PI (10% LSTM, 90% water) is 20 rubles, the cost of 1 ton of the proposed PI (20-30% catholyte, 80-70% water) is 0.1 rubles, i.e. It is 200 times cheaper.

With the adopted specific consumption of PI equal to 0.01-0.03% by weight of the material being crushed, the economic effect of using the proposed PI on a cement plant with a capacity of 2 million tons per year is 79.6 thousand rubles.

With the introduction of the proposed IP in the cement industry, the annual economic effect will be about 11.2 million rubles.

The use of the proposed PI provides an increase in the specific surface of the cement by 15–20% and the strength of the cement stone by 30–40%, makes it possible to replace expensive IPs, eliminates the transportation costs and costs associated with its storage, detects new

Claims (1)

properties, such as increasing the mobility of the cement, reducing the adhesion of the comminuted material to the balls and lining, reducing aggregation. Invention Formula The cement grinding method, which includes grinding the clinker with 0.01-0.03% of the grinding intensifier in a ball-type drum mill, characterized in that, in order to reduce the grinding time, reduce the cost, electroactivated water with a pH of 10-12 and water with a pH of 7.1-7.3 in the ratio, respectively (20-30): (70-80).