SU1651990A1 - Vibrating screen - Google Patents

Abstract

The invention relates to the ferrous metallurgy and mining industries, in particular for sowing difficult fractions of various materials. The purpose of the invention is to increase the efficiency of screening and reliability of the screen. The screen contains an oscillating box 1 with a pad 2 fixed to it and a sieve 3 loosely laid on the pad monitor. The loading end of the screen 3 is connected by an elastic connection 4 to the box 1, and the weight of box 1 and sieve 3 is chosen from the TC / TC ratio of 1.75 -2, where ts is the mass of the sieve, 2 kg; t "- box weight, 1 kg. The material enters the screen, where under the action of vibrations received from the vibrator 7, the sieve 3 intensively acts on it. The material moves in the direction of the discharge part of box 1. Box 1 and screen 3 oscillate at different amplitudes and collide with each other, imposing additionally a shock on the material's method, which clears screen 3 from being stuck in its cells of difficult fractions. Vibration and shock effects contribute to a significant loosening of a thick layer of material and an increase in speed of movement. 2 Il.

Description

The invention relates to ferrous metallurgy and the mining industry, in particular for sieving difficult screen # fractions of various materials.

The purpose of the invention is to increase the efficiency of screening and reliability of the screen.

In Fig.1 shows a roar, a General view: in Fig.Z - section aa in Fig.1.

The screen consists of an oscillating box 1 and a support plate 2 rigidly attached to it, on which a sieve 3, which is a shock element, is freely laid. In the loading part of the screen, elastic ties 4 are installed that impede the movement of the sieve 3 along the box 1. In this case, the latter rests on the frame 5 through the shock absorbers 6, and it receives vibrational excitation from the vibrator 7.

The masses of the box and sieves are selected from the ratio tf / tk = 1.75-2.0, where t _s is the weight of the site, kg; t _to - the mass of the box.

The roar works as follows.

Material, for example, sinter return screening of a fraction of 0-5 mm, is fed to a sieve 3, where the fines of a fraction of 0-2.5 mm are screened out, and a fraction of + 2.5-5 mm, a sieve product, must be returned to the bunkers of the blast furnace. Under the action of the vibrations of the box 1, excited by a vibrator 7, ma

The aterial moves towards the discharge part of the box 1. The sieve 3 is freely laid on the box 1 and also perceives vibrations from the vibrator 7, but since the box 1 and the sieve 3 are not rigidly connected and have different masses, they oscillate with different amplitudes and collide with each other about each other, imposing additional impacts on the material layer. Vibration and shock effects contribute to significant loosening of the thick layer of material and increase the speed of the screened fractions at the contact of the sieve 3. In addition, shock effects clean the sieve 3 from getting stuck in the cells of difficult fractions, and the selected ratios also reduce the dynamic loads of the box on the base.

Claims (1)

SUMMARY OF THE INVENTION A vibrating screen comprising a box with a vibrator, a sack attached to the box and a sieve loosely laid on the sump. The loading end of which is connected by an elastic connection with the box, characterized in that, in order to increase the efficiency of screening and the reliability of the screen, the ratio of the mass of the sieve to the mass of the box is made equal to 1.75-2.0. A Editor E. Kopcha Compiled by B. Levchaev Tehred M. Morgenthal Corrector S. Shevkun Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St. Order 1734 Circulation 390 Subscribed VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035. Moscow, Zh-35, Raushskaya nab., 4/5