SU767220A1 - Device for input of additives into ladle - Google Patents

Description

(54). DEVICE FOR INPUT OF ADDITIVES IN BUCKET

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The invention relates to the field of ferrous metallurgy, in particular, to devices for injection of additives into a steel-teeming ladle during electric steelmaking, and can be used to produce high-quality steel at other melting units.

A device is known for introducing deoxidizing agents into a steel-teeming ladle, 10 containing weight hoppers, feeders, funnels, a collector and a chute l.

However, such a device does not provide high accuracy of dosing, as well as the possibility of supplying additives with 15 predetermined layering and consistency, which currently requires progressive process technology of after-furnace treatment of metal. The fact is that obtaining high-quality steels by introducing refining additives into the metal has become an indispensable means of technology. Backfilling of a mixture of components in a ladle leads to large losses of expensive - doped alloying additives (fatigue, poor dissolution in the metal, uneven distribution in it, etc.). For example, an alcuminium will burn by 30% if it is entered into 30

tal without forced immersion, and this is possible by forming on the surface of its granules a layer t of human additives. Layer-by-layer introduction of alloying or deoxidizing agents into the metal in an optimal technology according to the technology reduces the consumption of expensive additives. Increasing the dosing accuracy while doing so improves the quality of the steel. The prototype does not provide this, since all types of material come from the weighing bins simultaneously, which complicates the process of requiring accurate filling of the additives into the weighing bins well in advance. The tubular collector and vibrators on it contribute to the mixing of the material, which does not provide layering and the sequence of input to the metal additives. It is not possible to adjust the additives by weight if it is necessary to adjust (refine) the steel, since the feeder can only load the weight bins, but cannot leave any part of them (excess). This leads to cost overruns of expensive material due to the low precision of its dosing, and sometimes even the production of steel without a specified assortment.

The aim of the invention is to improve the accuracy of dosing and feeding the material with a given layer and sequence.

This goal is achieved by the fact that the device is equipped with stationary tanks with chutes located above the weighing bins, at the bases of which are placed individual feeders with trays inserted into the side walls of the weighing bins, and the gates are mounted on the outlet openings of the weighing bunkers over the collection, made in the form of a moving endless strip.

FIG. 1 shows the device, a general view; in fig. 2 — node I in FIG. 1 (the joints of the functionally connected elements of the device and one of the options for placing the additives on the collector in the process of feeding them into the ladle).

The device for introducing additives into the ladle contains self-discharging containers 1 with additives, stationary tanks 2 with chutes 3, at the bases of which are placed individual feeders 4 with trays 5 inserted into the side walls b of the weight bins 7. The outlets of the weight bins are fitted with 8 sec. driven, and their bases are fixed funnels 9. Under the funnels is a collection of 10, made in the form of a movable endless band moved by the driving drum 11. Under the drum is installed receiving estrus 12, connected to the common skin 13 rats with the collection. Under the receiving chute have a bucket 14 or transfer capacity of the transport device.

The device works as follows.

Additives in the form of alloying or packaged ferroalloys using self-discharging containers 1 I fall asleep in the tank 2. Then, depending on the given optimal technology, by switching on the feeder 4, the additives 3 and 3 and the tray 5 are fed into the weighing bins 7 to the required weight quantity. Additives can be loaded layer by layer into weighing bins, mixed them or (see Figure 2), lighter ones such as aluminum can be placed at the gate, covering them with heavier additives. Only one can download

view and form the desired stratification on the collection 10 (see Fig. 2). Any of the best options for metal alloying or deoxidation is possible.

 Opening the closures 8, the additives are fed through the funnels 9 under an adjustable flow to the collector 10. Then the additives go to the receiving chute 12 and through it to the ladle 14 or to the transfer capacity of the transport device,

About where they are served in the bucket. It is also possible to reduce or stop the input of additives if a final analysis of the smelting requires it. For which shutter 8 overlap the outlet

5 in the weight bin 7.

The technical and economic efficiency of the proposal is very significant and consists of a number of factors.

Thanks to the layered location-.

By reducing the material, the waste of additives, such as aluminum, is reduced. The possibility of sequential input of additives without mixing them ensures an optimal mode of refining

 metal. The possibility of adjusting the amount of feed materials improves the dosing accuracy and reduces the consumption of expensive alloying materials. The flexible input system is numerous with components in any of their ratios and scientific research institutes and consistency contributes to a better assimilation and even distribution of them in the metal.

Claims (1)

Invention Formula A device for injecting additives into the ladle, containing weighing bins, feeders, funnels, collection tank and receiving chute, about tl and ch That, in order to improve the accuracy of dosing and supplying the material with a given layer and sequence, it is equipped with stationary bones with chutes located above the weight bins and individual feeders with trays inserted into the side walls of the weight bins, with locks installed on the outlets of the weight bins, and funnels located above the collection, made in the form of a moving endless strip. Sources of information taken into account during the assessment 1. USSR author's certificate 5 595396, cl. C 21 C 7/00, 1976.