DE33097C - Process for the extraction of sulfur antimony in concentrated form from ores containing antimony and for the extraction of gold and silver from the latter - Google Patents

Description

IMPERIAL

PATENT OFFICE

CLASS 4O: Metallurgy.

(England).

In the production of metallic antimony from the naturally occurring sulfur compound The same (stibnit) is always a loss, as well as an inconvenience. the Treatment of ores containing only a small percentage of antimony present. These have partly in the larger quantity to be treated, partly in the Extra flux or other materials their reason the metal particles to be converted into the molten state.

The purpose of the present invention is now that only a small percentage of sulfur antimony containing ores to treat in a cheap and effective way to remove rocks or other impurities from the said To excrete sulfur antimony, and to obtain the latter in a concentrated form. Further is supposed to deposit gold or silver contained in the ore in a profitable manner will.

The ore becomes so far for the purpose of obtaining sulfur antimony from ores low in antimony ground or powdered to pass through a sieve with about 16 holes for 1 cm can. This finely powdered ore becomes an aqueous, preferably hot, solution a solid alkali, a solid alkali sulfur compound such as sodium sulfur and Potassium sulfur, the sulfur metal of an alkaline earth, such as calcium sulfur, magnesium sulfur and sulfur barium, or a cold solution of sulfur ammonium added in the manner described below and that The whole thing stirred by any device. The solution can also be powdered ores can be added. The sulfur antimony binds in a solution with one of the above Alkali, while the rock and other impurities remain undissolved and settle on the bottom of the vessel in which the Surgery is performed, can stop.

This paragraph of rock-. and other impurities is appropriately removed from the Vessels are removed or the solution containing the sulfur antimony is decanted or transferred to another vessel, with the residue. remains in the former vessel. The solution containing the sulfur antimony is mixed with a sufficient amount of salt or other treated cheaply with acid to neutralize the alkali and precipitate the sulfuric antimony, which is filtered off or drained and then dried.

The sulfur antimony obtained from ores in the manner described above is strong concentrated and is better suited to the representation of metallic antimony than before his Separation from the rock or other admixtures.

Instead of using an acid, the sulfur antimony can also be released by introducing a stream of air to be precipitated into the solution; the solution can also be evaporated to dryness and the resulting mixture of sulfur

Claims (1)

antimony and its sulphide or alkali compound with -> .; iron melted together or be further treated in a suitable manner. . ' In practice it has been found, that ores, which have passed through a screen of the above-mentioned mesh size rapidly in a sodium sulphide solution of about iilJ ^ this _{or a} sulfur 25 ° Beaume calcium solution or dissolve in the solution of a higher sulfur compound. Of the ° 8 ° Beaume Procefs can be made with cold solutions, as well as with more coarsely ground ores although it is not so beneficial then. Instead of the ground or powdered To add ore to the cold solution of a solid alkali, as described above, it can also in a closed vessel equipped with a stirrer of an aqueous sulfur ammonium solution, are best added to a higher sulfur compound. If sulfur ammonium is used, then the double sulphide obtained is decomposed by heating in a closed vessel; ' the Sulfur ammonium is carried away with the steam and recovered for reuse in a condenser, while sulfur antimony together with some sulfur forms a densely insoluble mass in the remaining liquid is precipitated, which mass then continues in a suitable manner treated, poured off and evaporated, pressed through a filter press and then in one closed vessel is heated to remove any excess sulfur. The solid mass is then in a strongly concentrated solution and is suitable to extract metallic antimony better than before it was separated from the rock, impurities or sulfur. When re-using the sulfur antimony obtained from the condenser Treatment of fresh ore mass, it is recommended to add a small amount of sulfur, to facilitate the effect. For the extraction of gold or silver, which is found in the rock and the residues of the in the way described above is contained the ores treated, the rock or the .Residence treated with an excess of alkali solution, in its place also a of the above-mentioned alkali sulfur compounds or a sulfur compound one of the above alkaline earths can occur; a sufficient one can also replace it Lots of hydrochloric or other cheap acid will kick in, or it will hit the rock or debris roasted in an oven to reduce traces of sulfur or its compounds. This gold or. silver-containing residue is then subject to further treatment after one of the. Extraction methods of gold or silver from their ores. The mass can also be chlorinated, and the gold by amalgamation deposited with mercury; on the other hand, silver can be chlorinated, in hyposulphurous acid Soda can be dissolved and precipitated with alkaline sulphide (such as sodium sulphide or potassium sulphide). In order to obtain the gold which has entered into a solution with the sulfur antimony, a small amount of hydrochloric acid or another acid is added to the sulfur compound mentioned, or a stream of atmospheric air or some other reagent is used which contains the alkali sulfur compound or the sulfur compound of an alkaline earth ( such as sulfur calcium, magnesium or sulfur · Schwefelbarium) as far decomposed to a very small amount of sulfur antimony (perhaps DAF 2 ¹ J ₂ per cent.) reflected. The greater part of the gold then becomes with this small amount of sulfur antimony. The precipitate is then collected and obtained the gold in various ways, which is through a surcharge with lead and through Drifting on the hearth can take place. Is sulfur ammonium the one for excretion of the sulfur antimony from its ore used, the inventors suggest that To deposit gold in connection with a small amount of sulfur antimony by the fact that the Solution is heated until a small precipitate of sulfur antimony appears, which results from the evaporation of part of the ammonium sulphide. Pa τ ε ν τ - claims: 1. The process of obtaining and separating the sulfur antimony from his Rock or other impurities, consisting in that one a) the ore containing antimony in the finely powdered state of the aqueous solution an alkaline, alkaline sulfur or alkaline sulfur metal compound (such as sulfur sodium or sulfur potassium or sulfur calcium, sulfur magnesium or sulfur barium), which solution to stir until the sulfur antimony dissolves; b) the solution obtained after separating the rock or residue of sulfur antimony by salt or other acid, by air, or . Air and acid precipitate or dry up by evaporation. 2. The modified process of sulfur antimony production at which in place the in claim ι. named alkali compound a sulfur ammonium solution occurs, which mixture in a closed vessel until the solution of the sulfur antimony is stirred to form a soluble double compound of sulfur antimony ammonium, which after separation of the rock or other impurities are brought to the boil in a closed vessel and decomposed, whereby the ammonium sulphide recovered in a condenser for reuse and the sulfur antimony from the residue through Evaporation, decantation or filtration is deposited. In connection with the procedures specified above:
The treatment of the insoluble gold- and silver-containing residue, which in the case of i. and 2. indicated antimony sulfur recovery remains, with an excess ^N shots one of the mentioned under 1. sulphide solution or an acid or by means of roasting of the residues for the recovery of gold and silver. 4. Treatment by means of chlorine and the precipitation of that gold which has passed through Amalgamation is contained in the residues resulting from the processing of gold-bearing sulfur antimony ores. 5. Treatment with chlorine, dissolution in hyposulphurous soda, and precipitation of the silver that is used in the processing of silver Sulfur antimony ores resulting residues is contained. 6. The precipitation of gold with a small amount of sulfur antimony from a solution, which contains sulfur antimony and sulfur gold, which are gold-bearing in the treatment Sulfur antimony ores are formed.