DE1923293A1 - Intermediate or finished non-ferrous metall- - ic products from molten raw materials - Google Patents

Abstract

An electromagnetic chute conveys the molten masses obliquely upwards from a floor by blowing and/or drawing in gas containing oxygen. This produces separation of materials into reaction products which are highly and slightly conductive and/or non-conductive. The electromagnetic chute is designed so that only the finished products resulting from the reactions ensuing in the chute are evacuated, while the intermediate products remain in the enclosed space.

Description

METALLGESELLSCHAi ¹ T 6 Prankfurt / Main, Joint stock company April 10, 1969

-S chr / MB ο.-

Prov.No. 6146 LC

Process for the production of non-ferrous metal smelting

The invention relates to a method for producing non-ferrous metals, metallic and / or non-metallic intermediate and end products from their liquid raw materials by oxidizing and optionally reducing treatment of the liquid raw materials.

In non-ferrous metallurgy, intermediate or end products are generally produced from the melted raw materials by means of multi-stage and continuous work in the melt flow. For example, the molten copper matte is blown into raw copper in the converter and then refined into commercial copper or anode copper. In the extraction of nickel, too, the molten raw nickel stone is then blown into a converter on fine nickel stone. The processes have the disadvantage that they can only be operated continuously. They also need large vessels and large ones

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Material Mongan. There are already methods of production known from copper, which work continuously. The Noranda process (Canadian patent 758 020) turns copper Obtained from concentrates in a converter-like reactor, with the resulting slag in parallel flow be carried. In the Worcra process (British Patent 1 123 959 | "Copper", March 1966, pages 2-5) Copper from concentrate in a flame furnace-like reactor generated. The slag is fed in the counterflow and collected in a separate part of the reactor. Around a sufficient separation of the different, respectively arising To obtain reaction products, both methods of the sedimentation tent require correspondingly grooso vessels. In addition, the copper produced contains oino of solubility corresponding amount of sulfur.

It is also known (German Offenlegungsschrift 1 408 88 * 7 liquid bison and other metals in the way too refine that highly-hit Elsen and thin-bodied tea Slag with a low temperature on a staircase shape Connection section through separate inlet nozzles

is given up in such a way that after a difficult run the iron is doughy and liquid and the slag is thinner. The removal of the doughy-leaved algae

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Iron melt is supported by a three-phase Y / other field motor. The stepped design the cleaning channel causes a strong kneading of the iron melt.

It is also known (German Offenlegungsschrift 1 433 631), liquid metals in an inclined, channel-shaped vessel with liquid slag in the Bringing the countercurrent into contact, the slag being cleaned of the undesired substances from the IJetail which are released from the slag in the process. The iietall becomes the channel through electromagnetic forces conveyed up while the slag flows down the channel by gravity.

The refining processes described are reactions between molten metal and Slag that is optimized by the apparatus. However, these processes are e.g. on metallurgy of copper and nickel not applicable. These are primarily reactions between gases and Melting, during reactions with the liquid slag and other conversions of minor importance are.

The invention is based on the object in 009847/0466

Non-ferrous metallurgy (non-ferrous metallurgy) production to enable intermediate or end products from the melted raw materials continuously, whereby only small reaction vessels are required and relatively small amounts of material take part in the implementation.

This object is achieved by melting by means of a known electromagnetic Gutter transported obliquely upwards from a sump while inflating and / or blowing in oxygen-containing gases be, whereby a material separation takes place between strong and weak and / or non-conductive reaction products, and wherein the electromagnetic trough is configured so that essentially only the end products of the in each case taking place in the channel conversions are discharged, but intermediate reaction products in the Reaction space remain.

The melt, which has been melted from the raw material, is fed into a vessel in which it forms a sump. In The lower end of the electromagnetic trough is arranged in this sump. The gutter is sloping like that arranged that its upper end in another vessel flows out. With the help of the electromagnetic field of the channel, the melt is in a controlled amount and with transported up the chute at a controlled speed.

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The melt is treated in the channel by means of oxygen-containing gases that are inflated and / or blown in will. The impurities oxidized in the process flow down the channel into the lower vessel, from which they come withdrawn continuously or from time to time. The discharged product treated in this way is transferred to the The vessel arranged under the upper end of the channel is discharged. The one in the sump of the first vessel Melt can already be pretreated by blowing in and / or inflating oxygen-containing gases. The inclination the electromagnetic channel and the applied electrical PeId are matched to one another so that essentially only the conductive end product to be treated further from the conversions carried out in the channel is carried out above.

If necessary, several channels are arranged in parallel or one behind the other.

A further embodiment of the invention consists in that that discharged from the electromagnetic trough Product in a further electromagnetic channel has a reducing effect by inflating and / or blowing in Gases is reduced, the electromagnetic trough is designed so that essentially only the final or intermediate product of the

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Reaction is carried out.

In this stage, metal may be contained in the further processed product of the first stage and in daa removed bound oxygen. The way of working is analogous to the way of working in the first stage, however reducing gases used.

Another embodiment of the invention is that the IJaterialflusa in the electromagnetic channel controlled by the electric field.

In this way, the material flow can always be optimal Way to be controlled.

A preferred embodiment of the invention consists in this that the reaction process in the first electromagnetic trough by adding additives to the for the The reaction process is controlled at favorable points.

The reaction is accelerated and controlled by adding slag-forming substances such as silica.

The gutters and vessels are aweekmäasigerweise through Hoods covered so that the gaseous reaction products

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collected, derived and possibly further processed «ground.

The inventive method can be used for all non-ferrous metal products in which a reaction between the liquid melt and a gas atmosphere takes place. Preferably it is used for processing Copper and Hickel smelters are used.

You have advantages of the inventive method in that the compulsory and precise separation of substances takes place, small amounts of material take part in the implementation, small apparatuses and products are required can be produced with great purity. The process can be operated continuously. As a result of With small and simple equipment, it is possible to stop and quickly resume operations. The process can be connected to any melting unit. Eich in Connection to a shaft furnace with a special burner (US Pat. No. 3,199,977) for fire refining of raw copper. This oven is designed in such a way that it can be switched on and off at any time. That The method according to the invention is eminently suitable as a supplement to this furnace, since it is also within

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can be switched on and off in a short time.

The method according to the invention is illustrated with reference to the drawings in more detail and "for example explained.

Pig.1 shows a flow diagram for the processing of copper concentrates using a flame furnace. The sulphidic concentrate is melted down together with the aggregates sand and lime in the furnace 1 to form a settable slag and a copper stone. The copper stone, which contains iron and sulfur in addition to copper, passes continuously into the induction trough 2. Under the action of air, _{iron is slagged with formation of SO 2} and a raw copper is produced. The raw copper melt, which has a high oxygen content, is placed in a further induction trough 3 and treated with reducing propane. The pre-refined copper produced in this way is cast into anodes on a casting machine 4. The SOg-containing gases from the furnace 1 and the reactor 2 are sucked off together and processed to sulfuric acid in a contact system.

As can be seen from Fig.1, the induction troughs different electromagnetic fields applied in sections. This ensures that the

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Induction trough 2 no sulfides and from the induction trough 3 only slightly oxygenated copper is discharged will.

Fig.2 shows a flow sheet for the processing of Blister copper using a shaft furnace that is equipped with special burners (Asarco oven). That solid blister copper is placed in furnace 1 and melted down. The liquid raw copper flows into the induction trough 2 and becomes an oxidizing one there Subjected to treatment under the action of atmospheric oxygen, with the impurities slagging. The oxygen-containing copper gets into the induction trough and is reduced there with propane. The copper refined in this way is cast into anodes on the casting machine 4.

In the present case, too, different electromagnetic fields are applied to the induction troughs in sections Fields created.

The system described is operated daily, but only in one shift. During the furnace after the end of pouring is turned off completely, the channels are kept warm by burners until the next batch.

-Pacentaneprüahe- 009847/0466

Claims (6)

Γ A TSNT CLAIMS 1.) Process for the production of metallic and / or non-metallic intermediate and end products of non-ferrous metals from their liquid raw materials oxidizing treatment of the liquid raw materials, characterized in that the melts by means of a known electromagnetic trough with inflation and / or blowing in oxygen-containing Gases from a sump are transported obliquely upwards, whereby a material separation between strong and weak and / or non-conductive reaction products takes place, and the electromagnetic trough so is designed that essentially only the end products are made in each channel Conversions are carried out, but intermediate reaction products .verberben in the reaction space. 2.) The method according to claim 1, characterized in that the further processing product discharged from the electromagnetic trough is reduced in a further electromagnetic trough by inflating and / or blowing in reducing gases, the electromagnetic trough being designed so that essentially only the end products the conversions carried out in each case are discharged in a channel, but intermediate reaction products remain in the reaction space.
009847/0466 3.) Method according to claims 1 and 2, characterized in that the flow of material in the electromagnetic trough is controlled by the electric field. 4.) Process according to claims 1 to 3, characterized in that the reaction sequence in the first electromagnetic trough is controlled by adding additives at the points favorable for the reaction process. 5.) Process according to claims 1 to 4, characterized in that that copper-containing raw materials are processed. 6.) Process according to claims 1 to 4, characterized in that nickellialtige raw materials are processed will. 009847/0466