RU2003935C1 - Gear for loading of sinter burden on cars of sintering machine - Google Patents

Abstract

Use - refers to the field of preparation of raw materials in metallurgy. Essence: improving the quality of finished products and reducing fuel and energy costs is achieved by using a device for loading the charge onto the sinter carts, consisting of an intermediate hopper with a charge delivery window, a rotating drum feeder, a stabilizer with an output edge and an inclined tray. - a knife-divider with movable holders and an intermediate support is installed above the stabilizer, while the input edge of the knife is installed at a distance from the surface of the stabilizer and by 0.3 - 0.7, and its projection onto the stabilizer surface - from its output edge, by 0.4 - 0.8 of the height of the discharge window of the charge discharge, respectively. For example, the prepared charge is fed into the storage hopper 1 and from there, it is dosed through the window with a drum feeder 2 onto the stabilizer and the inclined tray. After the stabilizer at its output edge, the charge arrays are destroyed in height by a knife-divider. The height of the knife is adjusted by changing the vertical position of the support. If necessary, the knife-divider can be folded upwards on pivoting holders. From the stabilizer, the charge falls onto the inclined tray and is laid on the sintering carts of the conveyor belt 1 or. l.i ss v “I ci. , .. „... / о i-Ј Ui-ai i) K I J И

Description

The invention relates to the field of preparation of iron ore raw materials in the iron and steel industry, and in particular to the design of sintering equipment.

Devices are known for loading the charge onto sintering trolleys of the sintering machine, consisting of an intermediate hopper with a charge dispensing window, a rotating drum feeder and an inclined tray 1.

The disadvantages of the known solutions are: a) adhesion of the material when it is discharged from the storage hopper through the loading window and, as a result, the inclusion of its individual volumes (arrays) with increased bulk density into the charge loaded onto the sintering carts. 8 as a result of imperfections in the arrays formed, there is a deterioration in the quality of the finished product and a decrease in the productivity of the sinter machine (due to a decrease in the grade of + 5 mm in the sinter); b) the presence of a significant number of volumes of the mixture with high density when it is rolled at an angle of repose from the drum feeder. The access of the heat carrier to such volumes in comparison with the rest of the charge is difficult; when the fuel burns in them, there is an increased chemical underburning. This leads to a decrease in the strength of the cake, an increase in the fuel consumption for the process, and a decrease in the gas permeability of the layer of the sintered mixture; c) limited possibilities for choosing rational from the point of view of stacking the charge height parameters of the loading device operation layer. As a result, there is an irrational distribution of fuel along the bed height, an increase in fuel and energy costs, and deterioration of other indicators of the sintering process.

In these devices, due to chips, an increase in the rotational speed of the drum feeder and a decrease in the height of the charge discharge window are necessary, which leads to destruction and adhesion. This disadvantage is eliminated when a stabilizer is installed on the drum.

The prototype is taken to be a device for loading the charge onto sintering trolleys, consisting of an intermediate hopper with a charge delivery window, a rotating drum feeder, a stabilizer with an output edge and an inclined tray 2. .

The disadvantages of this device are: a) insufficiently efficient destruction of arrays with practical

the absence of such height destruction. As a result, volumes with increased bulk density fall on the sintering trolleys and, as a result,

the undershot of such massifs, the underburning of the solid fuel contained in them, and the decrease in the vertical rate of sintering of the charge. At the same time, the quality of the finished product deteriorates and the fuel and energy costs of redistribution increase; b) the lack of methods for intensifying the destruction of arrays when they leave the stabilizer, its output edge, for example, methods of forced vibration of the layer. As a result, volumes with increased density are stored on the sintering trolleys, which leads to an increase in the consumption of solid fuel in the charge and deterioration of the quality of the finished product; c) lack of separation methods

descending from the stabilizer layer. By its height and. as a result, irrational distribution of fuel along the bed height, increased fuel and energy costs and the deterioration of other process indicators

sintering.

The aim of the invention is to improve the quality of finished products and reduce fuel and energy costs of redistribution. This goal is achieved by using the device for loading the charge onto the sintering trolleys of the sintering machine, consisting of an intermediate hopper with a charge delivery window, a rotating drum feeder, a stabilizer with an output edge and an inclined tray, in which a knife divider with movable holders is mounted above the stabilizer intermediate support, while the input edge of the knife is installed at a distance from

the stabilizer surface by 0.3-0.7, and its projection onto the stabilizer surface from its output edge by 0.4-0.8 of the height of the discharge window of the charge discharge, respectively.

in traditional systems, with the same physicochemical properties of the mixture — the granular composition of the ratio of the components of the mixture, its moisture content and, as a consequence of flowability, the nature of the stabilizer disengagement approaches a stable one with relatively small discreteness. However, the non-uniformity of the charge properties in macroscopic volumes, which is probabilistic in nature, causes fluctuations in the internal forces

friction, conditions of deformation and shear of individual microvolumes of the layer, i.e. its discreteness. An array falling onto an inclined tray, along with a charge stream that moves along the surface of the tray evenly

thin layer, causes a low degree of separation of the charge fractions on the tray and, accordingly, on the slope of the bed and fluctuations in the composition of the charge, especially fuel, along the height of the layer. Hence, the quality of the agglomerate deteriorates and it becomes necessary to supply some excess fuel to the layer, due to its lack in the macro-volumes of the charge layer.

Increasing the uniformity of the structure of the charge loaded onto the sintering trolleys, in particular, the destruction of the compacted massifs by their height, can significantly increase all the main indicators of the agglomeration redistribution and therefore is an urgent task. At the same time, the methods for destroying compacted arrays by their height during loading of the charge are not very promising at the present time. In the present invention, a device is developed for loading a charge onto sintering trolleys, equipped with a system for destroying the material flow coming from the stabilizer by its height, which is a vibrating knife-divider of the charge, weighed 1 in height and cantilevered on rotary (movable) holders. The device has the following distinctive features.

The working inlet edge of the batch dividing knife (i.e., an edge directed towards the movement of the material flow and representing additional resistance to the movement of the material flow, contributing to the destruction of the arrays formed in it) should be installed at the place of formation of the arrays and iix chip. For this, the projection of the working edge of the divider knife on the stabilizer surface along its axis should be performed at a distance from the stabilizer output edge, equal to 0.4-0.8 of the height of the discharge window for dispensing the charge from the intermediate hopper. The projection of the input edge of the knife-divide should fall directly on the surface of the stabilizer at a point located on its axis. Otherwise, the charge layers will either not be affected, or new arrays will form due to repeated closure of the layer. With a smaller distance between the output edge of the stabilizer and the projection (projection point) of the input edge of the divider knife (less than 0.4 of the height of the discharge window of the charge delivery), the divider knife does not hit the array, they go undamaged to the inclined tray and, as a result, fuel and energy costs for redistribution are growing and the quality of finished products is deteriorating. With a greater distance between the output edge of the stabilizer and the projection of the input

edges of the divider knife (more than 0.8 of the height of the discharge window of the charge discharge), due to the closure of the layer and the re-formation of arrays, the consumption of solid fuel for redistribution increases.

The divider knife is movable, mounted on pivoting holders x mounted on a stationary storage hopper, i.e. at the most stationary

0 element of the device (the hopper is stationary and protected from vibrating and other loads). Swivel holders on one side (on the hopper) are equipped with a movable rotation support, on the other hand (closer

5 to the knife) support movable in the vertical direction. Moving this support vertically, wait 1.-. they simplify the given point of the layer. The drill-knife itself is reinforced kinsochno and psd pressure converging

0 from the stabilizer of the charge constantly vibrates, provided additional destruction of the compacted 1.mlsshyuo. Another constructive design of this node does not solve the old tasks.

5Knife deliegel. -.opzh h dig located

at a distance of or at the surface of 5 ilpzagoosis, equal to 0.3-0.7 of the height of the split-off charge window. When the knife is removed from the stabilizer by a shorter distance (less than 0.3 height of the discharge window per

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volumes (mass.), the quality of the finished product and the value of solid fuel consumption uaixiy. When deleting

5 knives from the stabilizer ng boch; sh / n yuchichinu (more than 0.5 vis. unloading from the O window of the shpggy) hfexp, 1hp1b and knock down the hsssgws by their height psnhttsch and the quality of irror.epsia also worsens and grow

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bch; ЧКъ, 13 1 WITH OCHCHOK “S. 1st Part 1. - ,, (1, L pR of the power feeder 2, stabilizer 3, knife divider 4 with pivoting holders 5 and support 6, inclined tray 7 located above the conveyor belt 8.

The device operates as follows.

The prepared charge is fed into the storage hopper 1 and from there it is dispensed through the window with a drum feeder 2 to the stabilizer 3 and the inclined tray 7. After the stabilizer at its output edge, the charge arrays are destroyed by height with a knife divider 4. The height of the knife is adjusted by changing the vertical position of the support 6. If necessary, the knife divider 4 can be folded up on the rotary holders x 5. From the stabilizer, the charge falls onto the inclined tray 7 and is placed on the sintering carts of the conveyor belt 8.

Example 1. On average design parameters.

The sequence of operations for the operation of the device here and in all subsequent examples is given above. Only the position of the divider knife relative to the stabilizer of this device is subject to change.

The distance between the working edge of the charge divider knife and the stabilizer surface is made equal to 0.5 of the height of the discharge window of the charge delivery from the intermediate hopper, i.e. 0.5-200 100 mm (where 200 mm is the height of the discharge window of the charge delivery). The projection of the input edge of the knife on the surface of the stabilizer is made at a distance from the output edge of the stabilizer, equal to 0.6 of the height of the discharge window of the charge, i.e. 0.6 - 200 120 mm,

With such device parameters, the sintering machine has a productivity of 1.65 t / m2h and a solid fuel consumption of 60 kg / t. Agglomerate c is produced on the sinter machine. an iron content of 50%, a basicity of 1.33, and a content of a fraction of 5 mm of 13.1%.

The prototype, a device for loading the charge onto sintering trolleys, was implemented on the sinter machine ASh-312 of the Novolipetsk Metallurgical Plant. This machine has a capacity of 1.61 t / mgh, solid fuel consumption of 64 kg / t and a fraction content of 5 mm in the sinter 13.8%.

Thus, the present invention surpasses the prototype in all respects.

Example 2. By minimum values of design parameters and by deviations from them.

The distance between the working edge of the divider knife and the stabilizer surface is made equal to 0.3 of the height of the discharge window of the charge delivery, i.e. , 03,200 60 mm. The projection of the input edge of the divider knife on the surface of the stabilizer is made

at a distance from the stabilizer outlet edge equal to 0.4 of the height of the discharge window of the charge discharge, i.e. 0.4 200 ° 80 mm.

With such device parameters, the agglomeration machine has a productivity of 1.64 t / m2 h. Solid fuel consumption is 60.5 kg / t and the content of the 5 mm fraction in the agglomerate is 13.1%.

Reducing the distance between the knife and the stabilizer is possible only to a value of 0.3 of the height of the discharge window of the charge. For example, with a distance between the knife and the stabilizer equal to 0.25 of the height of the discharge window of the charge, the consumption of solid fuel increases from 60.5 to

62.1 kg / t, and the content of the fraction of 5 mm about the agglomerate - by 0.6%.

Reducing the distance between the projection of the edge of the divider knife on the surface of the stabilizer and its output edge is possible only to a value of 0.4 of the height of the discharge window of the charge. So, with a distance between the projection of the edge of the knife-divider on the surface of the stabilizer and its output edge, equal to 0.3 height

charge delivery windows, due to a decrease in the destruction efficiency of the arrays, the fuel consumption per redistribution increases by 2.1 kg / t of sinter and the quality of the sinter decreases.

Example 3. To the maximum values of the operational parameters and to deviations from them.

The distance between the working edge of the divider knife and the stabilizer surface

made equal to 0.7 of the height of the discharge window of the charge, i.e. 0.7 200 140 mm. The projection of the input edge of the divider knife on the stabilizer surface is made at a distance from the stabilizer output edge equal to 0.8 of the height of the discharge window of the charge discharge, i.e. 0.8 200 160 mm.

With these parameters of the device, the sintering machine has a productivity of 1.65 t / m h, solid consumption

fuel 60.1 kg / t and the content of the fraction of 5 mm in the sinter 13.0%.

An increase in the distance between the knife and the stabilizer is possible only up to a value of 0.5 of the height of the charge discharge window. So,

with a distance between the knife and the stabilizer equal to 0.6 of the height of the charge discharge window, the consumption of solid fuel in the charge grows by 2.4%. and the fines content of the 5 mm fraction in the sinter from 13.0 to

thirteen.%.

An increase in the distance between the projection of the edge of the divider knife on the surface of the stabilizer and its output edge is possible only up to a value of 0.8 of the height of the discharge window of the charge discharge. Even at a distance between the projection of the edge of the knife-divider on the surface of the stabilizer and

its output edge, equal to 0.9 of the height of the charge discharge window, due to the re-formation of arrays, increases solid fuel consumption by 3.2% for redistribution and increases the content of fines of the class 5 mm of finished products by 4.1%.

(56) Lovchinovsky E.V. Mechanical equipment for the sintering of iron ore. M .: Metallurgizdat. 1977, p. 47.

USSR copyright certificate No. 1444606. class. F27 B 21/06, 1987.

fifteen

Claims (1)

The claims  DEVICE FOR LOADING THE BATTERY ON THE SINTERING CARS OF THE AGLOMERATION MACHINE, comprising an intermediate hopper with a dispensing window 20 of the charge, a rotating drum feeder, a stabilizer with an output edge and an inclined tray, characterized in that it is equipped with a knife-divider installed above the stabilizer with movable holders and an intermediate support, while the input edge of the knife is set at a distance of 0.3 - 0.7 from the surface of the stabilizer, and its projection on the surface of the stabilizer from its output edge is 0.4- - 0.8 height of the discharge window of the charge, respectively.,