DE310526C

DE310526C -

Info

Publication number: DE310526C
Application number: DENDAT310526D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Erfindung betrifft ein Verfahren zur Verarbeitung komplexer Metallverbindungen, ζ. B. Sulfide, die gleichzeitig Kupfer und Eisen enthalten. Das Verfahren besteht darin, daß derartige Metallsulfide mit Silizium oder Siliziumlegierungen unter Luftabschluß bei hoher Temperatur so lange behandelt werden, bis die leicht legierungsfähigen Metalle, z. B. Eisen, in Form von Siliziumverbindung abgeschieden und die übrigen Metalle im Stein konzentriert werden.The invention relates to a method for processing complex metal compounds, ζ. B. Sulphides, which contain copper and iron at the same time. The procedure is that such metal sulfides with silicon or silicon alloys in the absence of air at high Temperature are treated until the easily alloyable metals such. B. iron, deposited in the form of silicon compound and the remaining metals concentrated in the stone will.

Läßt man nämlich Silizium oder eine Siliziumlegierung auf ein geschmolzenes Metallsulfid bei 'einer Temperatur von ungefähr 1500° C einwirken, so tritt eine Zersetzung des Sulfides unter Bildung einer Siliziumlegierung des Metalles und unter gleichzeitiger Austreibung von Schwefel ein. Die einzelnen Metallsulfide verhalten sich indessen gegenüber Silizium sehr verschieden. So bilden Eisen, Nickel u. dgl. sehr leicht eine Siliziumlegierung, während Kupfer und andere Metalle nur langsam reagieren. Es hat sich nun gezeigt, daß, wenn man Silizium auf kupferhaltigen Schwefelkies einwirken läßt, sich zunächst ausschließlich Ferrosilizium bildet, das sich als eigenes, im Stein unlösliches Metallbad ausscheidet. In dem ausgeschiedenen Ferrosilizium sind nur sehr kleine Kupfermengen vorhanden. Bei der Behandlung des Kieses mit Silizium wird also Eisen in ein Metallbad übertragen, Schwefel destilliert ab, und Kupfer wird in einer Matte angereichert.If you let silicon or a silicon alloy on a molten metal sulfide act at a temperature of about 1500 ° C, decomposition occurs of the sulfide with the formation of a silicon alloy of the metal and at the same time Expulsion of sulfur. The individual metal sulfides, however, behave towards each other Silicon very different. Iron, nickel and the like very easily form a silicon alloy, while copper and other metals are slow to react. It has now been shown that if you let silicon act on copper-containing pyrites, at first only Ferrosilicon forms, which is deposited as a separate metal bath that is insoluble in the stone. Only very small amounts of copper are present in the precipitated ferrous silicon. When the gravel is treated with silicon, iron is transferred into a metal bath, Sulfur distills off and copper accumulates in a mat.

Bei unvollständiger Behandlung von geschmolzenem Kies mit Silizum kann man also erreichen:If the molten gravel is not completely treated with silicon, one can reach:

1. das Eisen als Metall zu gewinnen,1. to extract iron as metal,

2. Abdestillation von Schwefel,2. distillation of sulfur,

3. Kupfer in einem Stein anzureichern.3. Enrich copper in a stone.

Wie weit das Verfahren zu treiben ist, hängt von dem Kupferverlust in der dargestellten Siliziumlegierung ab.How far the process is to be taken depends on the copper loss in the figure shown Silicon alloy.

Vorteilhaft wird die Anreicherung jedoch nicht weiter als bis 10 bis 20 Prozent Cu im Stein getrieben. Der erhaltene Stein wird auf übliche Weise weiter verarbeitet.However, the enrichment is advantageous not more than 10 to 20 percent Cu im Driven stone. The stone obtained is further processed in the usual way.

Die näheren Bedingungen zur Ausführung des Verfahrens bestehen darin, die Behandlung bei einer Temperatur oberhalb des Schmelzpunktes der abgeschiedenen Siliziumlegierung zu halten und rechtzeitig zu unterbrechen, sobald die Anreicherung genügend fortgeschritten ist.The detailed conditions for carrying out the procedure are the treatment at a temperature above the melting point of the deposited silicon alloy and to interrupt it in good time as soon as the enrichment has progressed sufficiently is.

Es muß also eine hohe Temperatur, eine für den erwünschten Entschwefelungsgrad genügend lange Dauer der Behandlung und eineIt must therefore be a high temperature, sufficient for the desired degree of desulfurization long duration of treatment and one

Claims

appropriate amount of silicon to be applied; Furthermore, it is also a condition that the action takes place in the absence of air. j! -l ;:. However, an exact specification of the temperature, the duration of the treatment and the amount of Sih'ziüjin used is not feasible, because each of these factors both / of / the choice of the other of these as well as ίο · of the material treated in each case and the desired desulfurization - and degree of concentration is dependent. It is expedient to work at temperatures of approximately 1500 ° or above, preferably in an electric furnace. Through experiments it has been found that by introducing a sufficiently large amount of silicon, e.g. B. in the form of ferrosilicon, in the melt (10 percent of the amount of gravel in the form of 50 percent ferrosilicon are sufficient) a complete decomposition of the gravel into its two components can be carried out by the sulfur being distilled off and the iron as low-percentage Fe Si with 7 until 15 percent Si is recovered. For the course of the process it is of course immaterial whether the alloying element is introduced through the charge or by itself, or whether it is presented in the furnace itself during or before the treatment. When using silicon, it can, as has been established by the inventor, advantageously be obtained by reduction in the furnace itself from the already existing or particularly added quartz-rich rock species. Silicon can be found here either directly according to the equation: SiO2 + 2C = Si + 2CO or according to the equation: i FeS + SiO2 = FeSi + SO2. form. The ferrosilicon obtained in the process can, for example, advantageously be used to produce high-percentage ferrosilicon. Finally, it should be emphasized that the alloy-forming element can also act directly on the sulfide, e.g. B. according to the equation: • FeS + Si == FeSi + S.. Patent Claims:

1. Process for the treatment of metal sulfides with silicon or silicon alloys with extraction of the sulfur bound to the metals, characterized in that, that sulfides are used which, in addition to alloyable metals, also contain those that do not or difficult to alloy, and that the treatment under the exclusion of air high temperature and continued for so long that the easily alloyable metals, z. B. iron, are deposited in the form of silicon alloys and the remaining metals are concentrated in the 'stone.

2. The method according to claim 1, characterized in that at temperatures of about 1500 ° C or above, preferably operates in an electric furnace.