SU1583167A1 - Discharging device for tumbling barrel - Google Patents

Abstract

The invention relates to grinding equipment and can be used in the mining, cement and other industries. The aim of the invention is to reduce metal consumption and increase productivity. For this, the discharge device of the drum mill has a discharge grid 1, elevators, the side walls of which are made in a curvilinear form, and a discharge sleeve, the discharge grid 1 being perforated in the sections bounded by 7 lines of intersection of the rear surfaces of the side walls of the elevators and peripheral parts 8 of the radii of the grid 1 constituting 0.1-0.4 mill drum diameter. 2 Il.

Description

The invention relates to grinding equipment and can be used in mining, cement and other industries.

The purpose of the invention is to reduce metal consumption and increase productivity.

In FIG. 1 shows a discharge device of a drum mill from the side of the grill; in FIG. 2 - also, with the removed grill.

• Unloading device of a drum mill includes an unloading grate 1, which has a perforated surface with holes 2 and a continuous non-perforated surface 3, elevators 4, whose side walls 5 are made in a curved shape, and an unloading sleeve. 6. Holes 2 Are made in areas limited by: Lines 7 of the intersection of the rear surfaces of the side walls 5 of the elevators 4 and peripheral parts of 8 radii (arrows indicate the direction of rotation of the mill).

Unloading device operates as follows.

The pulped material in the mill drum passes through the holes 2 of the grill 1 and falls under the rear surfaces 7 of the side walls 5 of the elevators 4. When the mill drum rotates, the grinded material is picked up by the side walls 5 and, when moving along it, falls into the zones of a continuous non-perforated surface 3 of the grill 1 , then into the unloading sleeve 6 and is discharged from the mill.

The optimal length of the peripheral parts of the 8 radii of the lattice, bounding the areas with holes 2, co. constitutes 0.1-0.4 mill drum diameters D g- (Fig. 1), since with a decrease in the length of the peripheral parts 8 of the lattice radii is less than a smaller value, the living cross section of the grill 1 decreases so much that significantly limits the performance of the mill.

With an increase in the length of the peripheral parts 8 of the lattice radii more than a larger value, almost the entire area of the elevators 4 will be perforated, which will lead to intramillary pulp circulation and a corresponding decrease in mill productivity.

Tests of the unloading device are carried out at a drum mill with a diameter of Ι) ς = 900 mm, the results are shown in the table.

From the table it follows that the optimal length of the peripheral parts of the 8 radii of the lattice, equal to (0, ΙΟ, 4) D &, provides the maximum performance of the unloading device.

Thus, the proposed unloading device has not only a lower metal consumption due to a significant simplification of the design, but also a higher productivity due to the exclusion of in-mill. personal circulation of the crushed material.

Claims (1)

Claim The unloading device of the drum mill, including the unloading grill, elevators, the side walls of which are made in a curved shape, and the unloading sleeve, characterized in that, in order to reduce metal consumption and increase productivity, the unloading grill is perforated in areas limited by the lines of intersection of the rear surfaces of the side walls of the elevators with the plane of the lattice and parts of the radii of the lattice, comprising 0.1-0.4 of the diameter of the mill drum. 5 1583167 The length of the peripheral parts of the radii, expressed in fractions of the diameter of the mill drum * D ₅ 0.01 0.02 0.05 0.1 0.15 0.2 0.3 0.4 0.45 0.5 Performance mills, kg / h 295 312 325 334 336 338 339 340 321 309 Figure 2