SU1089383A1 - Device for loading conveyor-type sintering machine - Google Patents

Abstract

BOOTING DEVICE OF THE CONVEYOR AGGROMERATION MACHINE, containing a frame, a sequentially installed bunker, a feeder, a tray and a reflector, which is intended to increase the strength of the cake and the productivity of the sintering machine by improving the gas permeability of the charge, the reflector is installed in the form of a flat and the productivity of the sintering machine by improving the gas permeability of the charge, the reflector is installed in a form, installed, installed in the form of the cake and the productivity of the sintering machine by improving the gas permeability of the charge, the reflector is installed as a flat, and installed. at an angle of 30-75® to the working surface of the inclined tray of the sheet with a turning mechanism, while the sheet is pivotally connected to the sinter machine frame by means of rigid vertical and flexible inclined bars; length, and the width of the gap between the surface of the reflector and the lower edge; an inclined tray is 8 widths of the reflector. 00: о оо СХ) 00

Description

The invention relates to the preparation of ores for smelting and can be used in ferrous and nonferrous metallurgy, as well as in the chemical industry in the agglomeration of ores and concentrates.

A device is known for loading silt ore into an sintering machine, consisting of a chute, a fender, a frontal and leveling shields til.

The drawback of the device is the low strength of the agglomerate during sintering of coarse-grained and granular charges due to the natural segregation of the material.

It is also known to have a loading device of a conveyor machine containing a hopper, a feeder, an inclined tray installed along the bottom end of the tray and protruding 0.15-0.60 diameters above its plane, a driving drum placed at a distance from the drum equal to -0.2- 0.6 of its diameter, an additional inclined tray with a length of 0.5-2.0 drum diameter I 2 1

However, the device is characterized by insufficiently high cake strength and productivity of sintering machines during sintering of coarse-grained charges due to increased segregation of the material due to the acceleration of the flow on the drive drum and the additional inclined tray. The closest to the proposed technical essence and the achieved result is the loading device of the conveyor sintering machine, containing the frame, sequentially installed hopper, feeder, inclined tray and reflector SZ.

The device has insufficiently high productivity of sintering machines and sintered strength when working on coarse-grained charge due to over-compaction of charge during e-loading due to high speed of its discharge from the tray or in case of overload of the tray with high pressure of the charge column on the forming layer, which reduces its permeability and, consequently, performance sintering machine, strong segregation of the components of the charge, leading to excessive depletion of the lower part of the sintered layer and oversaturation of the upper

its part is carbon, which negatively affects both the gas permeability of the charge and the strength of the cake.

The purpose of the invention is to increase the strength of the cake and the productivity of the sintering machine by improving the gas permeability of the charge.

The goal is achieved by the fact that in the loading device of the conveyor sintering machine containing a frame consistently installed hopper, feeder, inclined tray and reflector, the latter is made as an inclined tray installed at an angle of 30-75 to the working surface, while the sheet is hinged is connected to the frame of the sintering machine with rigid vertical and flexible inclined bars of variable length, and the width of the slot

between the surface of the reflector and the lower edge of the inclined chute is 0.5-0.8 times the width of the reflector.

The installation of a sheet-shaped reflector reduces the bulk density of the layer due to the inhibition of the charge flow at the exit of the tray, as well as minimal segregation of the components of the charge, both due to the deceleration of the flow and due to the lack of natural slope of the layer.

Smaller bulk of the charge, as well as a better distribution of carbon across the layer height, ensure hardening of the cake and an increase in the productivity of sinter machines.

If the distance from the lower edge of the inclined chute to the reflector (slit width) less than 0.5 width of the reflector breaks the uniform loading of the pallet with the charge, it becomes possible to clog the slit with pieces of agglomerate, metal and other items coming with the charge. The maximum width of the slit is 0.8 times the width of the reflector and should not exceed 0.5-0.7 of the height of the layer being sintered. With a larger gap width, segregation is enhanced.

At an angle between the surface of the inclined chute and the surface of the reflector less than 30 the uniform loading of the charge is disturbed. Increasing the angle above 75 causes the reflector to stick.

The drawing shows the boot device, the total ICP.

The device contains a sequentially installed hopper 1, a feeder 2, an inclined tray 3, a reflector 4 equipped with a turning mechanism 5.

Reflector 4 is a rectangular metal sheet with a length equal to the width of the inclined 3 and a width equal to the height of the pallet. The reflector is fixed on a horizontal frame 6, hingedly connected to the frame of the sintering machine by means of rigid vertical bars 7 and flexible inclined bars 8. By changing the attachment point of vertical bars 7 to the frame 6 and the length of inclined bars 8, the required position of the reflector 4 is established. relative to the inclined tray 3 and the grate pallets. With the help of the rotation mechanism 5, an angle of ° C is established between the reflector and the inclined chute 3.

The device works as follows.

The hopper load 1 drum feeder 2 fed to the inclined

tray 3. The flow of the charge accelerated on the inclined tray 3 is slowed down by the reflector 4 and is loaded onto the pallets of the sintering machine without a natural return. In case of falling between the grate pallets and the reflector 4 pieces of metal, large pieces of ore, etc. suspended on flexible rods 8, the reflector 4, together with the frame 6, is lifted and passes a foreign object. The working gap between the reflector and the grate pallets is 50-100 mm.

Example. Reflectors on sintering machines are installed vertically (at an angle of 45 to the inclined chute) at a distance of 200 mm (0.7 width of the reflector) from the lower edge of the inclined chute and 0.07 m from the surface of the grate pallets.

In the process of testing, an evaluation of the operation of the sintering machines when loading with known and proposed devices is given.

The table shows the results of a comparative evaluation of the operation of the limestone and the proposed device.

The output of the product is caking,%

Agglomerate

Return

Sinter strength,

Impact strength

Abrasion

Content class mm in the charge (%) at a distance from the surface of the layer, mm:

0-60

60-120

120-180

180-240

240-300

77.00 23.00

72.6 5.52

16.4 20.3 16.0 16.3 20.6

Technological performance of sintering machine (numerator - sinter machine number 3, the denominator - sinter machine number 4)

Sintering machine speed, m / min

Table continuation

1.95 / 2.0

1.91 / 1.80

1089383

Indicators

Vacuum, mm water column: in 1A vacuum chamber 15 vacuum chamber in the exhauster collector

Animated strength of the specs on pallets:

Top half of the cake:

Shock resistance,%

Abrasion,% Lower half of the cake:

Shock resistance,%

Abrasion%

These tables indicate that the proposed boot device allows to significantly reduce the segregation of the charge by particle size distribution, as well as to achieve a more rational distribution of carbon in the lower part of the sintered layer (without a maximum on the horizon of 180-240 mm and a higher content on the horizon of 240-300 mm) . Braking the flow of the tonnage before loading it on pallets reduced the bulk density of the charge by an average of 8%.

Smaller bulk of the charge and more rational distribution of carbon in the lower half of the layer during loading, the proposed 1 m device led to an increase in the rate of air flow through the layer, as well as

8 Continuation of the table

Loading device known I proposed

441/393 373/204 634/548

69.5 4.73

69.3 5.73

To reduce its decline in the area of 9-11 vacuum chambers. Due to the higher gas permeability of the layer, the vacuum in the 14th and 15th vacuum chambers, as well as in the exhauster collector, decreased on average by 40–50 mm water column.

Increasing the strength of the cake when loaded with the proposed device resulted in an increase in the yield of sinter by 1.25% (from 75.75 to 77.0%) and its strength by 0.9% abs.- (from 71.7 to 72.6%). As a result of increasing yield

 sinter machine performance increased by 1.6%.

 Using the device will allow you to get an annual economic in the amount of 189.5 thousand rubles.

Claims (1)

LOADING DEVICE OF A CONVEYOR AGROMERATION MACHINE, comprising a frame, a sequentially installed hopper, a feeder, an inclined tray and a reflector, characterized in that, in order to increase the cake strength and sinter performance by improving the gas permeability of the charge, the reflector is made in the form of an installation at an angle of 30- 75® k - working surface of the inclined sheet tray c. rotation mechanism, while the sheet is pivotally connected to the sinter frame using rigid vertical and flexible inclined rods of variable length, and the width of the gap between the surface of the reflector and the lower edge of the inclined tray is 0.5 • 0.8 of the width of the reflector. I