SU1114463A1 - Sorting crusher - Google Patents

Abstract

I. CRUSHING-SORTING INSTALLATION, containing a roll mounted on the bed and a screening device located under the bed, characterized in that, in order to stabilize the particle size distribution of the coke for the blast furnace charge, level with a screening device, and the roll is made with radial ribs. 2. The installation according to claim 1, characterized in that, in order to reduce the crushing forces, the roll is mounted on the frame by means of elastic elements. | 3. The installation according to claim., Which is distinguished by the fact that, in order to increase the efficiency of crushing pieces of coke more than 80 mm, the roll is made hollow and equipped with an unbalanced shaft installed coaxially with it. . 41 O 00

Description

The invention relates to ferrous metallurgy, in particular to coking and blast furnace production, and can be used in other areas to stabilize the granulometric composition of the raw material.

Known devices that stabilize the particle size distribution of coke with the help of screens by sowing individual fractions 1.

At the same time, the presence of 480 mm skip coke adversely affects the progress and technical and economic indicators of the blast furnace smelting.

A device is known that allows crushing a large part of the coke without separating it from the stream. On the ramp from the ramp conveyor to the inclined shaft, the shaft parallel to the drive drum of the ramp conveyor and 1.4–1.6 m separated from it is mounted. On the shaft, the whip was rigidly mounted with a distance of 140 .--- 160 mm between them. . The shaft rotates in such a way that “bcc along the stream” comb it to a certain depth, hit the large pieces, and some of them throw it on the demolishing league. This device reduces the content of large classes. For example, a class of +80 mm at one of the plants has been reduced to 6%. At the same time, the number of small classes increased by O, - 0.3% | 2).

The disadvantages of this device are the impossibility of completely eliminating the class -f 80 mm, as well as over-grinding and maintaining the content of small classes. An increase in the fraction of +80 mm with in skip coke reduces the physical activity of the night by 45 tons per day. (1.6%) with an increase in coke consumption by 3 kg / t of pig iron (0.7%).

The closest in technical essence to the present invention is a crushing and screening plant, containing a roll mounted on a bed and a screening device 3 under it.

However, the known installation is not able to provide stabilization of the particle size distribution of coke for the blast furnace charge.

The aim of the invention is to provide a stabilization of the coke particle size distribution for the blast furnace charge.

The suspended pellet is achieved by the fact that in a crushing and screening plant containing a swath mounted on a bed and a screening device located under it, the latter is made with a roll table mounted on a roll bed.

located on the same level with the screening device, and the roll is made with radial ribs.

Moreover, to reduce the crushing efforts, the swath can be mounted on the bed by means of elastic elements.

In addition, to improve the efficiency of crushing pieces of coke more than 80 mm, the roll can be made hollow and equipped with a well-balanced unbalanced shaft coaxially with it.

FIG. I schematically depicts the proposed installation; in fig. 2 is a section A-L in FIG. one.

The device comprises an actuator I, an elastic coupling 2 connected to an unbalance shaft 3 on which bearing 4 is worn. Ijo upper holder enters the drum 5, on the outer side of which the bearing () is wired, which is connected through elastic elements

7 8. The crushing roller 8 is provided with radial ribs 10. Its frame is at the level of the upper cm and the roller table II is installed, the upper screen of the spill section 12 with openings is +80 mm and section 13 with openings less than -80 mm.

The device also contains a hopper 14, a bead 15 and a bottom sieve 16.

The device works as follows.

Coke through the feed hopper 14 enters the area of the sieve 12 with large openings. After a fraction of less than 80 mm is removed, coke pieces of +80 mm fall along the movement on the roller table 11 under the crushing roller 9. The crushing roller 9 consists of a drum 5 equipped with radial ribs 10 for better capture of large pieces. The drum is driven from engine 1 through clutch 2. The roll includes debalance shaft 3 to increase the crushing efficiency. In addition, the crushing roll rests on a fixed bed

8 through the elastic elements 7, which makes it possible to limit the crushing forces and prevent overgrinding.

Beyond the stabilization section, a coke of -80 mm class enters a second screening section 13 with openings of less than -80 mm for a more even distribution of Fia load. between the sith. Thus, coke is charged into the blast furnace from the upper sieve section 12 and the lower sieve 16, and fines (25 mm) pass through the openings of the sieve 16 and are removed.

The economic effect is achieved due to reduction in skip, coke fraction 480 mm.

vCM

M

: ii

eight

Claims (3)

I. CRUSHING AND SORTING PLANT, comprising a roll and a screening device located below it, characterized in that, in order to stabilize the coke particle size distribution for the blast furnace charge, the screening device is made with a roll table installed on the roll bed located on one level with a screening device, and the roll is made with radial ribs. 2. Installation according to π. 1, characterized in that, in order to reduce crushing forces, the roll is mounted on the frame by means of elastic elements. At 3. Installation according to π. I ,. characterized in that, in order to increase the efficiency of crushing pieces of coke more than 80 mm, the roll is hollow and equipped with a coaxially mounted unbalanced shaft. Fig /