SU791425A1 - Charge disintegrating method - Google Patents

Description

(54) METHOD FOR CUTTING CRUSHING

one

The invention relates to grinding technology in two-stage separator grinding plants and can be used in the building materials industry, as well as in the chemical, metallurgical and other industries that widely use fine dry dispersion of multicomponent mixtures.

There is a known grinding method with the introduction of an easily milled component (coal, tripoli, etc.) with a reduced aggregation capacity 1 into the comminuted multicomponent mixture.

In this method, the grinding of the raw material mixture is carried out at the joint feeding of all the components into a multi-chamber drum mill, in which they are crushed in one pass to the finished product.

Thus, the use of a known method is limited to using it only for open-cycle mills, and when using it for grinding in a closed cycle, the intensification of grinding is insignificant due to the removal of the main part of the easily grinding component from the grinding process during classification.

The closest to the invention in its technical essence and the effect achieved is the method of grinding the charge, consisting of components that differ in grindability and aggregation capacity, in two-stage grinding plants from a sub10 whose total amount of difficult-grindable component with increased -aggregation ability into a mill Stage I, the classification of the products of grinding on the finished product and grains 5 and the final grinding of the last in the mill stage 2.

The grinding process according to this method proceeds insufficiently efficiently at the P grinding stage due to the pronounced aggregation and adhesion of the fine material to the lining and grinding bodies, which leads to povkiennom energy consumption for grinding in general. This happens 25 due to the fact that during separation, the grains are enriched with a carbonate component, which is a difficult to grind and strongly aggregating material, and at the same time is combined by a clay component that is a weakly aggregating and easily grindable material. Therefore, the grains fed to grinding in a stage II mill have an insufficient amount of a weakly aggregating component to suppress aggregation effects.

The purpose of the invention is to increase the grinding efficiency and reduce energy consumption.

This goal is achieved by the fact that with the method of grinding the charge, consisting of components that differ in grindability and aggregation capacity, in two-stage grinding plants with the supply of the entire amount of difficult to grind component with increased aggregation capacity in the first stage mill, the classification of grinding products to the finished product and grains and grinding the last one in the mill of the P stage, 20-50% of the total amount of easily grindable ingredients with reduced aggregation capacity is fed into the 1st stage mill w, and the remaining part of the latter is fed together with the grist in grinding mill stage II.

At the same time, the material grinding in a mill 11 is aggravated, as compared with the known method, with a weakly aggregating component, as a result of which the sticking and aggregation phenomena are significantly weakened and the process proceeds more efficiently.

The pa of FIGS. 1-3 are shown cxe # J of two-stage grinding for the implementation of the method, variants.

Figure 1 illustrates the operation of the scheme with the Doppelrotator mill. When the whole quantity (100%) is difficult. the malleable component a and x% of the easily milled component l are fed to the mill. 1 I stage.

The remaining part of the (100-x)% easy-to-grind component b and the grains c after classification are sent to the 2 nd stage mill. Separator 3 is fed with a mixture of d minced products 1 and 2 in mills.

Fig. 2 shows a scheme in which the entire amount (100%) of the difficult to grind component a and x% of the easily milled component b after grinding in a mill I herd is sent for classification to separator 3, and the whole grains with and (100 x)% mild component b is sent to the mill stage II, after which the material d is fed to the classification in the separator 4.

Fig. 3 shows a grinding scheme with an intermediate separation, when 100% of the hard to grind component a and x% of the easily mild component b after grinding in

the mill of stage 1-d is sent to the separator 3, after which the grains with and (100)% of the easily milled component b are fed to the mill of the 2 n stage.

"The options shown for grinding schemes are different in terms of the organization of the grinding process in Stage 2 Mill II.

The greatest effect with the use of the invention is achieved in the scheme depicted in FIG. 3, where the grains are ground in the 2 nd stage mill to high dispersion, when the material aggregates and sticks more to the grinding bodies and to the armored futoroke.

The determination of the proportion of the easily milled component with a reduced aggregation capacity supplied to the mills of the I and P stages is performed

0 by stepwise changing the distribution of this component in the mills, estimating the efficiency of the installation under the given conditions and determining from this data the reaction area of the ratio between the amounts of easily reclaimed material with reduced aggregation capacity supplied to the mills of different stages.

0 The proposed method allows to increase the grinding efficiency and reduce energy consumption.

Claims (2)

1.Hodakov G.S., Fine grinding of building materials. M., Stroyizdat, 1972, p. 71-73, 2. Olesov, N.A., et al. Peculiarities of raw material conversion. - Cement 1977, W 3, p.7- “. (2Q-5Q% 1,