SU1548169A1 - Method of milling materials in cement production - Google Patents

Abstract

The invention relates to wet and dry methods of grinding raw materials and to a method of grinding clinker in the production of cement and can be used in other industries of the industry for fine grinding of materials. The invention is aimed at reducing power consumption and improving the performance of the grinding unit. The grinding of materials in the production of cement is carried out with the introduction of the mother solution of pentaerythritol and an aqueous solution of the complexing agent in the ratio (8-11): 1 calculated on the dry matter in an amount of 0.02-0.1% by weight of the materials to be ground. 5 tab.

Description

I

(21) 4361171 / 23-33

(22) 01/08/88

(46) 07/03/03. Bup. № 9 (71) State All-Union Design and Research Institute of the Cement Industry Giprotcement

 (72) L.I., Tkach, A.M.Dubov, Yu.G.Redko, V.P.Kozka, S.V.Yankelevich, I.A.Fridman, A.S.L'vov and V.V.Buiyikhin

(53) 666.942 (088.8)

(56) USSR Copyright Certificate No. 1071592, cl. From 04 To 7/52, 1982.

(54) METHOD OF CUTTING MATERIALS IN CEMENT PRODUCTION

(57) The invention relates to wet and dry methods of grinding raw materials and to a method of grinding clinker in the production of cement and can be used in other industries in fine grinding of materials. The invention aims to reduce energy consumption and improve the performance of the grinding unit. The grinding of materials in the production of cement is carried out with the introduction of pentaerythritic and a complexing agent aqueous solution as an intensifier for grinding (8-11 HI calculated on the dry matter in an amount of 0.02-0.1% by weight of the materials to be ground. 5 table .

The invention relates to wet and dry methods of grinding raw materials and to a method of grinding clinker in the production of cement and can be used in other industries of the industry for fine grinding of materials.

The aim of the invention is to reduce the electric power dissipation, increase the productivity of the grinding unit, h

The method proceeds as follows.

As an intensifier of grinding, a pentaerythritol mother solution (MCI) and an aqueous solution of a complexing agent are used: NTF (nitrile-trne methyphosphonic acid), HEDP (oxyethylidene diphosphonic acid)

EDTA (ethylenenamine K, H, H, K tetra-acetic acid).

MCI (chemical industry waste) contains I7-30% sodium formate (HCOONa) P up to 6% pentaerythritol GC (SNAOH, and the rest is water. This solution is a weak surfactant and has a thinning effect.

In combination with a small amount of a complexing agent, for example, HSPD, NTF, IDA (icnodiucetic acid) and others, a significant synergistic effect occurs, which to a large extent activates the surfactant properties of pentaperitrite and sodium formate, which leads to an increase in productivity

to

omolnogo unit and reduce the specific power consumption.

In the processing of raw materials by the wet method, in addition to increasing the efficiency of grinding, the viscosity of the slurry suspension decreases, which makes it possible to reduce the moisture of the processed materials and to increase the use of the grinding method.

The test results obtained by grinding the clinker are presented in Table. one; The test results obtained using raw sludge in the wet method - in the table. 2} COOT-carrying of changes in operating costs (cost of the intensifier) with a relative increase in the productivity of the mill with the dry method of grinding - in Table. 3

Similar dependences occur in the wet method of grinding raw sludge.

The implementation of the method is carried out with the domol coarse ground sludge in the raw material mill No. 2 4x13.5 and the grinding of clinker in a pipe two-chamber mill.

. Directly to the throat of the raw mill, an intensifier is fed, consisting of 90% MRP and -10% aqueous solution of NTF (0.05% of dry matter). The flow rate is 200 liters of solution per hour or 25 kg per hour dry matter, including NTF kg.

The test results are presented in s table. four.

As can be seen from the table. four,. the introduction of an intensifier grinding allows to increase the productivity of the mill and reduce the specific energy consumption by 10%. At the same time, the spreadability increases 20

25

thirty

35

40

+ NTF type) 1: 1 NTF 7: 1

8: 1

0.01

0.02

0.1

0.05

0.02

0.05

0.1

0

five

0

five

0

by 11%. In addition, a significant inhibitory effect is noted, which is confirmed by a decrease in the amount of iron in the sludge.

When grinding the clinker, the intensifier is supplied from the tank, where a solution is prepared in advance, similar to that described, by a pump through a nozzle c. 500 liters per hour, which is 0.02% of dry matter, including 2 kg of NTF per hour.

The test results are presented in Table. five

As can be seen from the table. 5, the productivity of the mill increases by 6% compared with the known method and by 18% compared with the control mode (without introducing a grinding intensifier) with a corresponding reduction in power consumption.

Claims (1)

Invention Formula The method of grinding materials in cement production by grinding with a grinding intensifier is the addition of a complexing agent from the group of an aqueous solution of polyamine polyacetic, alkylphosphonic, alkylsulfonic acids, characterized in that, in order to reduce energy consumption, increase the performance of the grinding unit, additionally as an intensifier milling solution of pentaerythritol is introduced in the ratio of the complex-forming additive (8:11): 1 to the dry matter, and the amount of intensifier Grind is 0.02-0.1% by weight of the material to be ground. Table 1 MCI + NTF 8: 1 10: 1 11: 1 + HEDP 8: 1 11: 1 + EDTA 11: 1 Without an intensifier - .. Continuation of table 1 riL-Tii /. table 2 56 58 59 58 56 58 59 60 58 56 57 58 59 57 58 58 59 56 58 55 13.5 M Productivity of the mill, t / h Specific energy consumption, Cement dispersion (specific surface), cm1 / g Consumption of intensifier,% Table 3 Table 4 Table 5 Consumption of NTF 1 of the complex), kg / h Consumption of MCI, l / h Cost of ientifier, r / t Cost of intensifier per 1 ton of product, rubU-f of product ZG-- 1548 (69 10 Continuation of table 5 2 150 107.5 0.07