LU83548A1 - DEVICE FOR DISTRIBUTING LOADING MATERIAL INTO A STORAGE ENCLOSURE FOR SUPPLYING A TANK OVEN - Google Patents

Description

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—..........— Γ'Κ 'if 1; UND-DUCHÉ DE LUXEMBOURG

Patent Nc ....... Q V ** (Jul 22 August 1522 gïnofa Monsieur the Minister of the Economy and the Middle Classes

Title issued ......................................... Intellectual Property Service

'SM? LUXEMBOURG

Invention Patent Application I. Request to me â'Alsaœ, Luxembourg ................................... ...................... (1) represented by E, Meyers & E.Freylincer> Inç.oonseile en propr.inâ. f ..................... (2) 46 rue âu Cimetière * LuxembourgA acting as agents this August 12th nineteen eighty one. ................................................. ( 3) at ...... IC ?? ............. hours, at the Ministry of the Economy and the Middle Classes, in Luxembourg: # 1. this request for the obtaining a patent for an invention concerning: ...... (4) storage for supplying a euoe oven ”.................... .................................................. .....................

2. the delegation of power, dated ...... Luxembourg ....................... 12 M! 2Ût .. 188.1 ... ...................

3. description in language ........ frsngais.e ................................. of the invention in two copies; 4 ......... three ... drawing boards, in two copies; 5. the receipt of the taxes paid to the Luxembourg Registration Office on ....... éouM ... Sxmi ... mil ... remf .... cent ... quaire ... riingt -..a...................... ........................ .................................................. .....

declares (s) assuming responsibility for this declaration, that the inventor (s) is (are): ........................ .................................................. .................................................. .................................................. .................................................. ................. (5) claims) for the above patent application the priority of one (or more) application (s) of (6) ...... .............. ~ ................................... ............................... filed in (7d ............ ........................... ....................... ...............

on ............................ ™ .................... .................................................. .................................................. .................................................. .................................................. . (8) in the name of ........................................... ...................... ............................ .................................................. .................................................. ................................. (9) elect (elect) for him / her and, if designated, for his representative, in Luxembourg ..................................

Cæ .âu .... Cim £ .i.iêr £ .j, ..... iMzextsurç ........................... .................................................. .................................................. ............................... (10) request) the grant of a patent for the invention for the subject described and represented in the abovementioned appendices, - with postponement of this issue to. ten - eight ........................... months. (11)

Llun âesL.! Pirr.iazxirce .................

<-— * L ———-— Does IT Deposit Report

The aforementioned patent application has been filed with the Ministry of the Economy and the Middle Classes. Intellectual Property Service in Luxembourg, dated: __te l - r ~ t r * \ \. i € · IvIIüiStri: λ 10 bsu "= s / S: '’% Economy and Middle Classes

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PATENT

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Loading material distribution device; in a storage enclosure for food j.

of a tank oven ï «

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PAUL WDRTE S.A.

: 32 rue d'Alsace | Luxembourg / - 1 -

Device for distributing the loading material in a storage enclosure for supplying a shaft furnace, .w --- The present invention relates to a device for j; distribution of the loading material in a storage enclosure for supplying a shaft furnace, said enclosure being provided with an upper opening for filling it! pleating and a lower opening for the flow, j · 10 these two openings being associated with shut-off valves! and / or sealing valves.

Installations for the supply of shaft furnaces, in particular blast furnaces, and more particularly | those fitted with rotating chutes with angle of inclination i; 15 adjustable to ensure the distribution of the load material are equipped with one or more of these enclosures to ensure intermediate storage before the flow on the distribution chute. These enclosures are necessary because of the pressurized operation of the blast furnace 20 and, for this reason, these enclosures are designed in the form of an airlock and are equipped, for this purpose, with upper sealing valves and lower sealing valves. intended respectively to ventilate these enclosures with a view to their filling and to put them under a pressure equivalent to that prevailing inside the furnace to establish a communication fs with this one and to allow the flow of the material of | loading.

This loading material, whether it be iron ore particles or coke particles, has a variable particle size. However, it has been observed that there occurs, during the filling of these storage enclosures, a segregation of the loading material according to precisely the particle size. In addition, this phenomenon of se- 1.

!: gregation is intensified by flow. This segregation [35 results from several factors whose effects are cumulative. One of the reasons that this segregation is had, when filling the storage enclosure, there is a ï if / cone with a natural spill around the vertical axis of 's * »4 - 2 - the enclosure . The larger particles tend to tumble along the slopes of this cone, under the influence of their weight towards the peripheral regions of the enclosure. On the other hand, the smaller particles, called "fines" 5 tend to remain in the central region of the discharge cone.

If, during filling, a natural discharge cone is formed, on the other hand, during flow, the opposite phenomenon occurs, that is to say that the particles in the central region tend to flow first and sink further to form a "V" shaped level of flow.

In addition to this filling and flow phenomenon, the fines tend to accumulate in larger proportions at the bottom of the enclosure, since, because of their size, they can slide between the particles more bulky. A third reason is that when the loading material falls into the enclosure, especially at the start of the filling phase, a certain number of larger particles break up in several parts, thereby forming fines. .

The cumulative effect of all these factors is that, in the initial phase of the flow of the loading material from the enclosure, the proportion of fines is much greater than towards the end of the flow where the proportion of larger particles becomes larger. As a result, if the contents of an enclosure are used to deposit a layer over the entire upper surface of the melting bed, and if for this purpose, a spiral or from concentric circles from the outside to the central region, the proportion of fines is much higher in the peripheral regions than in the central region around the vertical axis of the blast furnace. It is obvious that this heterogeneous distribution has a detrimental influence on the operation of the furnace.

The object of the present invention is to provide a distribution device of the kind proposed in the preamble which does not have these drawbacks, in other words a dis-I position to ensure a uniform and homogeneous distribution .T "'- 3 - of the material loading into said enclosures.

To achieve this objective, the invention provides a device for distributing the loading material in a storage enclosure for supplying a shaft furnace, said enclosure being provided with an upper opening for filling and a lower opening for the flow,; these two openings being associated with firm closing valves and / or sealing valves, characterized by the presence, inside the enclosure, of an obstacle provided in the path of fall of the material load falling into said enclosure through the upper opening.

This obstacle is preferably formed by a box open towards the top and carried by a transverse support fixed on the side walls of the enclosure.

According to a first embodiment, this box has a closed bottom allowing it to fill with the loading material and form a material-material box.

According to a second embodiment, the box is designed in the form of a funnel with an open bottom, the opening of which has a section which is smaller than the section of the upper filling opening of the enclosure in order to der-fill the filling of the funnel and form a matter-matter box.

According to a third embodiment, the box 25 is formed by a box with a horizontal bottom and provided with an opening whose section is smaller than the section of the upper filling opening to allow the filling of said box and to form a material box. - * material.

The device proposed by the present invention has several advantages with complementary effects. One of these advantages is that the rate of fall of the loading manner is reduced, which decreases the production of fines due to the bursting of the more voluminous particles. Another advantage is constituted by the division of the current of the material, which reduces the separation effect between the fines and the larger particles due to the discharge cone. In addition, the reduction in speed / fall, thus having the division of the material current - 4 - generates an additional advantage constituted by the fact that the wear caused by the impact of the material on the lower part of the material. wall of the enclosure, especially in the initial loading phase, is no longer focused in one place, but more uniform due to the division of the current and appreciably reduced because of the decrease in the rate of fall.

Other particularities and characteristics will emerge from the description of several advantageous embodiments, presented below, by way of illustration, with reference to the three appended figures, each representing respectively a schematic view, in vertical section of a embodiment of the device proposed by the invention. The same references have been used in the three figures to designate identical elements.

The reference 4 designates in each of these figures the upper part of the head of a blast furnace containing, in the example considered, the rotary chute with adjustable angle of inclination for the distribution of the loading ma-20 follow a spiral or concentric circles.

The reference 6 designates a flow funnel opening through a vertical channel on this not shown chute.

The references £ and 8 'designate two storage enclosures designed as an airlock allowing the introduction of the loading material into the oven, while the latter is under high pressure. These two airlocks 8 and 8 ′ are each provided with an upper valve 10, 10 ′ for closing and sealing, as well as a set of lower valves comprising a metering valve 12, 12 ′ and a valve sealing 14, 14 '. As shown in Figures 1 to 3, these locks £ and 8 'operate alternately, that is to say that one of these locks is isolated from the oven 4 by its sealing valve 14 35 for filling , while the other airlock is isolated from the atmosphere and communicates with the interior of the oven 4 for the flow of its contents. The two airlocks 8, 8 ′ are also provided with loading openings 16, 16 ′ to be% (alternately placed in communication with a hopper 18 <T ~ i - 5 - supply.

I In the first embodiment according to! Figure 1, the obstacle provided by the present invention is designed as a cylindrical box 20, 20 'open above 5 and closed bottom. This box 20, 20 'is fixed on a transverse beam 22, 22' fixed in turn on the side walls r of the enclosure 8, 8 '.

As illustrated by the filling phase of the airlock 8, this box 20 divides the flow of the load material-10 falling from the hopper 18 and therefore prevents the formation of a central discharge cone and the segregation caused by this one.

I The boxes 20, 20 'remain constantly filled [with loading material, even during the flow out of the airlock 15 (see box 20'). In other words, the box 20, 20 ′ i is not very sensitive to wear, given that it is designed 1 in the form of a material-material box.

In the second embodiment according to FIG. 2, the obstacle proposed by the present invention is designed in the form of a funnel 24, 24 ′ fixed on a transverse beam 26, 26 ′ in turn embedded in the side walls of the 'enclosure 8, 8'. The cross-section of the flow opening i of this funnel 24 is smaller than the cross-section of the feed opening 16, 16 ', so that, when filling the airlock, the funnel 24 or 24' remains filled, despite the flow through its lower opening. As shown in relation to the airlock 8, the material falls on the filling surface by overflow from the funnel 24, and through its lower opening. This second embodiment has the advantage over the first embodiment that, owing to its central discharge through the lower opening of the funnel 24, 24 ′, it ensures even more distribution. uniform during the airlock filling phase.

The third embodiment illustrated in FIG. 3 also includes a sort of box 28, 28 'mounted on a transverse beam 3ü, 30' fixed in the enclosure 6, 8 '. The embodiment according to FIG. 3 is / a combination of the two previous embodiments,

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- 6 - in the sense that the device is a kind of box 28 similar to the box of FIG. 1, the bottom of which is provided with a flow opening 32, 32 ′ similar to the embodiment of FIG. 2. As for this figure 2, the sec-5 tion of the opening 32, 32 'is less than the section of the supply opening 16, 16', so that the box 28 is filled and its distribution effect is the same as that provided by the funnel 24, 24 ′ in FIG. 2. In addition, the box 28, 28 ′ is a kind of material box * 10 material as in Figure 1, since, as shown for the box 28 ', the box remains partially filled during the flow out of the airlock 8' ß- \

Claims (1)

1.- Device for distributing the material (loading into a storage enclosure for the supply of a shaft furnace, said enclosure being provided with an upper opening for filling and with a lower opening for the flow, these two openings being associated with closing flaps and / or sealing valves, | characterized by the presence, inside the enclosure 910 (8, 8 ′) of a planned obstacle in the falling path of "the loading material falling into said enclosure through the upper opening (16, 16 '). j * 2. - Device according to claim 1, charac-. terized in that said obstacle is formed by a box; 15 open upwards and carried by a transverse support; (22, 26, 30, 22 ', 26', 30 ') fixed to the side walls! of the enclosure (8, 8'). : j 3. - Device according to any one of claims 1 or 2, characterized in that the box (20, 20 ') 20 has a closed bottom allowing it being filled with; the loading material and form a material box | ; matter. fi 4. - Device according to any one of the res | dications 1 or 2, characterized in that the box is ß 2. designed in the form of a funnel (24, 24 ') with open bottom, the opening of which has a lower section than the section of the upper opening (16, 16 *) for filling the enclosure (8, 8 ') S · |; to allow the filling of the funnel (24, 24 ') and Î. form a material-material box. I 30 5. - Device according to any one of claims 1 or 2, characterized in that the box is b / formed by a box (26, 28 ') with a horizontal bottom and provided] ~ |. an opening (32, 32 ') whose section is less than the section of the upper filling opening to allow the filling of said box and form a material-material box. I - I -y -—- y-!; . f