RU1837967C - Crushing and grading plant and jaw crusher - Google Patents

Description

with

The invention relates to the crushing and titration of various materials, which can be used primarily for

processing dump metallurgical aks with a high content of metal inclusions, and can also be used in the production of building materials, in

w sk z go

mining and other industries.

The purpose of the invention is to increase productivity and reliability.

Achieving this goal is ensured by the fact that in the crushing and screening plant, the first metal trap is installed under the crusher loading conveyor, the second is above the unloading conveyor, the third is under the upper class unloading conveyor from the classifier screen, while the front crusher is articulated with housing with the possibility of lifting and lowering, and the dimensions of the side of the grid cell, the width of the crusher receiving hole and the height of the cheek are correlated to at least 1: 1.89: 1.42.

These ratios are selected from the following considerations.

If the side of the cell is taken to be 1.00, then the maximum size of a piece of slag or metal inclusion past N1

About 4

 00

go through this lattice will be equal to the size of the diagonal of the cell, i.e., N. 2,

It is this piece of metal inclusion, if it enters the crushing chamber of the jaw crusher, that should be separated from the crushed material, in this case from the slag. Its separation from the slag is ensured by the fact that the crusher cheek is made up and down in a vertical plane, as a result of which a passage hole is formed under it through which a suitable (metal) inclusion is removed. Based on this, the maximum height of the cheek should be equal to 1.42 with respect to the side of the cell, i.e. G2. The value of 1.42 is chosen because 4Tof2 with a deficiency will be 1.41, and with an excess - 1.42. If we take a maximum cheek lift of 1.41, the metal inclusion passing through the cell of the grate may not be removed from the crushing chamber of the jaw crusher, since its maximum value may be somewhat larger. The height of the cheek, equal to 1.42 of the side of the cell, ensures that the metal inclusion of a size greater than the side of the cell is removed from the crushing zone (crushing chamber).

As for the size of the small side of the receiving opening of the crushing chamber equal to 1.89 of the side of the cell, this value is determined experimentally and is due to the fact that the metal inclusion passing through the cell of the grating and entering the crushing chamber must be lowered to its height so that the force of the cheek bath the crusher would be sufficient to remove the inclusion of the maximum size from the crusher chamber through the passage opening formed under the cheek when it is lifted.

The experimental determination of this parameter was carried out as follows.

Metal pieces were selected whose maximum dimensions were 1.42 times the size of the lattice cell. Selected pieces were loaded into the crusher, in which the small side of the inlet of the crushing chamber could be adjusted, Depending on the size of the side of the inlet of the crushing chamber, the jaw crusher or removed these pieces through the through hole formed under the cheek , or not. The size of the small side of the crushing chamber was fixed at which the pieces of metal inclusions selected for the experiment were removed. In this way

the parameter of the small side of the inlet of the crushing chamber (width) was selected, which turned out to be equal to 1.89 of the side of the grid cell mounted on

bunker.

This indicator is chosen as a parameter due to the fact that it is the small side of the inlet of the crushing chamber that determines the force with which

oscillating from the cheek presses on crushed material.

The above ratios are minimal, ensuring the operability of the complex as a whole. At their

With a larger increase, operability is maintained, and the likelihood of jamming of the jaw crusher in the installation is reduced, for example, at ratios of 1: 2.0: 1.5.

0 The determination of the specific dimensions of the side of the grid cell, the width of the crusher inlet, and the height of the cheek are as follows. For example, when using a modernized crusher of the SMD-109 type, with the size of its inlet opening equal to 400 x 900 mm, according to the established

0 ratios, the absolute dimensions of the side of the grid cell, the width of the inlet of the crushing chamber and the maximum height of the cheek of the modernized crusher, respectively, are 211,400,

5 300mm.

In FIG. 1 shows a crushing and screening plant; in FIG. 2 - jaw crusher; in FIG. 3 is a view along arrow A in FIG. 2.

0

The installation consists of the following elements: receiving hopper 1 with a grate installed above it having square cells, magnet 2, not

5 entering directly into the installation, but necessary for releasing the grate from large metal inclusions that do not pass through its cells, into hopper 3, of a conveyor system consisting of

0 conveyors loading 4, 5 and unloading 6, 7, a magnetic trap 8 installed in front of the jaw crusher 9 above the conveyor load 4, connecting the jaw crusher with a hopper feeder 1, and

5 magnetic traps 10 and 11. one of which is mounted above the discharge conveyor 6 of the crusher, and the other above the discharge conveyor 7 of the upper class from the screening classifier 12. Under the jaw crusher 9 there is a hopper 13 for mixing inclusions that are separated from the slurry i | a in the jaw crusher itself,

Installation works as follows.

The processed material, in private and dump metallurgical slags containing metal inclusions, is deposited on a square grid and mounted above the receiving hopper. At the same time, magnet 2 is activated, by means of which large metallic inclusions are removed from the grate , g roaring cell size, in hopper 3.

From the receiving hopper 1, the material is qVynaeT to the loading conveyor 4. In the slope of the material moving on the conveyor, it is under the influence of a magnetic trap 8, which partially sortes the metal inclusions passing through the grating cells into the drive, after which the material enters a jaw crusher 9, the cheek of which is made possible to move in a vertical plane. The maximum lifting height corresponds to 1.42 the size of the lattice cell of the pressure hopper 1, and the small side of the receiving opening of the crushing chamber exceeds 1.89 times the size of the side of the lattice cell. Such a relationship between the dimensions of these elements of the installation allows, along with crushing the material, to automatically and; drive the removal of inclusions in hardness exceeding the hardness of the crushed material. Q, in particular, to separate the metal ones from the slag, the dimensions of which exceed 1 exceed the size of the exit slit of the crushing mill by a measure. Therefore, crushed slag comes from the jaw crusher 9 to the discharge conveyor 7, in which there may be metal inclusions, its measurable with the size of crushed slag. As this stream moves along the loading conveyor 5 to the screening classifier 12, the metal inclusions are further removed by magnetic trap 10, after the slag enters the screening classifier 12, where it is separated into medium-fine grinding fractions. Separated fractions from the screening classifier 12 are transported by unloading conveyors 7 via the corresponding storage tanks. A third magnetic trap 11 is installed above the unloading conveyor of the middle fraction of ish aka, which makes it possible to completely clean w; ak from metal inclusions ..

The use of the invention allows the disposal of waste metallurgical slag / previously not sold due to the impossibility of their processing associated with a large number of metal inclusions (10-15%). This installation is due to the use of a special jaw

crushers, the specific location of magnetic traps and their quantity, as well as a certain ratio of these structural elements allows you to almost completely separate the slag from

0 metal inclusions and use them in the national economy: metal inclusions - in metallurgy, ground and slag dispersed by fractions - in the cement, construction and other industries.

5 An integral part of the crushing and screening plant is a jaw crusher, the cheek of which is capable of moving in a vertical plane, which allows during crushing

0 waste metallurgical slag to separate metallic inclusions if their size exceeds the size of the outlet opening of the crushing chamber.

However, the proposed constructional crusher can also be used in the processing of other materials, which are a mixture of different types. the hardness of the ingredients, for example a mixture of cast iron and steel, if necessary, crushing and separating them.

The aim of the invention is to increase the reliability of operation in the mode with the separation of metal inclusions.

For this, the crusher is equipped with a discharge slope installed under the front cheek for discharging these inclusions, the front cheek olore is made in the form of a portal with a window for dropping inclusions into the slime, and the guides are made in the form of grooves in the port racks with rollers laid in the grooves.

Schekova crusher 9 of the proposed design consists of the following elements (Fig. 2): a bed (not shown), a crushing chamber 14, which is formed by a bed and

5 cheeks: cheek 15. vibrating under the influence of the drive mechanism 16. and cheek 17, which is capable of reciprocating in the vertical plane in a special frame (portal) 18 along the rollers 19. Under the upper bar of the frame 18 are installed spring elements 20 and to remove foreign inclusions from the crushing chamber, in this case metal, exceeding the sizes of the exit slit of the crushing chamber 14, a slip 21 is provided in the tank 13.

Frame 18 has a U-shape. Its lateral racks are guides for the cheek 17 and are made in the form of grooves, in

which are equipped with rollers 19 that facilitate upward movement of the cheek 17 by reducing frictional force between the cheek 17 and the guide posts of the frame 18. The upper part of the frame 18 simultaneously serves as a limiter for the vertical stroke of the cheek 17. The U-shaped shape of the frame 18 provides an upward movement of the cheek 17 holes through which the crushed foreign body is removed from the crushing chamber, and the execution of its racks in the form of grooves is due to the installation of rollers 19 in them.

Under the bounding plate of the frame 18, spring-loaded elements 20 are mounted, connected to the cheek 17. They are selected in such a way as to compensate for the part of the weight of the cheek 17 and to ensure its upward movement only when the cheek 17 is exposed to an indestructible foreign body, in this case, a metal inclusion present in recycled slag.

Under the frame 18, a slit 21 is attached directly to the bed of the jaw crusher to remove impenetrable inclusions in the container 13 intended for this purpose.

Shchekova crusher works as follows.

When a piece of caked metallurgical slag containing a metal inclusion, the dimensions of which exceed the dimensions of the exit slit of the crushing chamber, enters the crushing chamber 14, the metal inclusion is separated from the slag. The slag-free inclusion is sandwiched between the crusher jaws 15 and 17. Cheek 15. having made an oscillatory motion, presses with force. The pressure on the contact with cheek 17 transfers this pressure to the latter. The cheek 17, having one degree of freedom, under the influence of the vertical component force P1 begins to rise upward, moving along the rollers 19 in the frame 18.

On the other hand, the arising torque moment of the force P, acting on the inclusion, makes it roll over the cheek 17, lifting the cheek itself due to the friction force between the cheek 17 and the foreign inclusion to the height at which the foreign body does not fall into the body formed under П -shaped frame 18, an opening from the crushing chamber 14 to a special slit 21 into a container 13 installed below it for non-crushing metal inclusions of slag.

As soon as the metal inclusion is removed from the crushing chamber 14, the cheek 17, under the influence of its own weight and spring elements 20, is returned to its original position.

thus carried out a further crushing process of dump metallurgical slag.

Thus, the proposed crusher

It is an integral part of the crushing and screening plant for processing waste metallurgical slag, but at the same time it can be used as an independent object for crushing

.0 materials with different hardnesses, if necessary.

An example of a specific implementation. The processed open-hearth or blast furnace slag is fed by motor vehicles to

5 grate mounted on the hopper

gratings with a mesh size of 315 x 315 mm

Large pieces of slag not passing

through lattice cells, tc fraction with

jackhammers, and the remaining large

0 metal inclusions are selected by a magnetic washer M42, which is suspended on a hoist that can move along a crane beam.

Slag passing through the grate gives the floor 5 to the hopper, from which it is fed through a conveyor to a specially designed jaw crusher. A magnetic separator of the MSh-1000 brand is installed above the conveyor. At the same time, the speed of the transport belt and

0 magnetic separator tapes are set equal. At this stage, the primary removal of metal inclusions that have passed through the receiving grate into a special hopper occurs

5 with a capacity of 20 tons

Slag with unreleased inclusions at this stage enters the jaw crusher. The crusher is equipped with an inclination dump inclination installed under the front cheek,

0, the support of the front cheek is made in the form of a portal with a window for dropping inclusions onto the slope, and the guides are made in the form of grooves in the racks of the portal with rollers laid in the groove.

5 The crusher is made on the basis of industrial crushers of the SMD-110 brand with a receiving opening of 600 x 900 mm. . -.

In the crusher, the slag is grinded to a value of 0-50 mm with the simultaneous removal of metal inclusions from the crushing chamber through the drop-out window of the portal and into a special container through the slip.

5 From the crusher, crushed slag enters the crusher unloading conveyor, over which a second magnetic trap is installed, with the help of which the metal inclusions that were separated from the slag and dimensions are removed

which do not exceed the size of the output verst of the crushing chamber.

Slag from this conveyor is fed to the GIL-52 rumble. where it is divided into two fractions with particle sizes of 0-50 and 0-20 mm.

The fraction fraction is fed by a conveyor belt into the feed hopper, and another by an inclined belt conveyor, “hell with which a third magnetic trap is installed, which is a magnet of angular cross section, with the help of which the last metal inclusions are separated.

Slags processed in this way (left to consumers.

The capacity of the crushing and screening plant is 800 tons of slag shift.

Claims (2)

SUMMARY OF THE INVENTION 1. Crushing and screening plant i is most important for processing the dump of the first metallurgical slag, including an unker feeder with a grate, i cake crusher, screening classifier, magnetic metal catchers, loading and unloading conveyors, distinguishing 0 5 0 5 so that, in order to increase productivity and reliability, the first magnetic metal trap is installed above the crusher loading conveyor, the second is above the crusher unloading conveyor, the third is above the upper class unloading conveyor from the screening classifier, while the front jaw of the crusher is connected to the casing with the possibility of raising and lowering, and the dimensions of the side of the cell of the grate, the width of the receiving opening of the crusher and the height of the raising of the cheek are correlated as 1: 1.89: 1.42. 2. A jaw crusher comprising a front jaw resting on the housing with lift-lowering guides and spring elements, a back jaw and a swing drive of the latter, characterized in that. that, in order to increase the reliability of operation in the mode with separation of metal inclusions, it is equipped with a slope for resetting these inclusions installed under the front cheek, moreover, the support of the front cheek is made in the form of a portal with a window for dropping inclusions into the skid, and the guides are made in the form of gutters in the portal racks with rollers laid in the gutters. / thirteen V pt / a.J thirteen fifteen FIG. 2 is.lalA .w sixteen about g / FIG. 5