DE208403C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 208403 CLASS '4Oa. GROUP

IMBERT PROCESS COMPANY in BOROUGH OF MANHATTAN, V. St. A.

Solvents, in continuous operations.

Patented in the German Empire on August 18, 1907.

The so-called precipitation process for the extraction of metals from their sulfur ores by mixing the ores with a metal that binds more easily with the sulfur and heating has already been used for the processing of lead luster (Pb S), gray cast luster ore (Sb ₂ S ₃ ), bismuth luster (Bi ₂ S ₃ ), the silver luster (Ag ₂ S) etc. It has also been proposed to open the aperture (Zn S)

ίο treat this way; as precipitation metal iron or manganese should be used to precipitate the zinc from the diaphragm or according to instructions made by another party

' Beat copper, which should be recovered by Bessemerizing the residues obtained.

Furthermore, for the purpose of facilitating and accelerating the chemical conversion, the use of so-called solution baths is recommended, which has the property have, both that serving as the starting material and that forming the residue To dissolve or liquefy sulfur ore at a comparatively low temperature. Closing Hch This method of dissolving the ores to be smelted beforehand in solution baths was also used for processing the oxygen-containing ones Zinc ores (red zinc, silica, zinc spar) recommended.

All of the proposed methods, insofar as they have been used or described so far, have always been intermittent operation. The different operations: loading, heating, the introduction of the precipitated metal, the trapping of the zinc vapors and the tapping of the residue were carried out separately one after the other. Present invention now relates to an arrangement by means of which the above-mentioned process can be carried out in uninterrupted operations is.

The new arrangement consists essentially of an elongated chamber, which is of the strongly overheated precipitation metal is traversed lengthways. In the place where the metal enters the chamber, a vertical shaft is provided in the ceiling, through which the ores with solvent are constantly thrown in, so that they are in the falling metal stream flowing past and be carried away by it. The metal stream can, as a result of the high overheating reported to him, of the ores thrown in in a manner known per se, easily give off the amount of heat required to melt it, required to initiate the conversion process and to keep the residue liquid is. The length of the chamber and the speed of the metal flow is such that when the flow reaches the end the chamber gets all of the zinc content

60

Claims (4)

is expelled from the ores. The excess precipitation metal, the residue that Gaits and the metal obtained can vary according to their specific characteristics Severity easily divorced from each other. The excess of the precipitated metal should be in the Superheater are returned. The arrangement for carrying out the method is shown in the drawing, and ίο shows: Fig. Ι a top view with the ceiling of the superheater furnace cut away, FIG. 2 is a vertical section along line 2-2 of FIG. FIG. 3 is a vertical section along line 3-3 of FIG. 1. When discussing the drawing, for the sake of simplicity, the application of the arrangement for the extraction of zinc from cover should be assumed. Iron should serve as ■ precipitation metal and a mixture of iron oxide (Fe ₂ O ₃ ) and slaked lime (Ca HO ₂ ) as a solution bath; The mixing ratios should be: 100 parts orifice, 23 parts of iron oxide and 10 parts of slaked lime. The schematically illustrated superheater furnace for the precipitated metal is designated by C , which is connected by channels D and E to the two ends of the elongated chamber A within which the reaction takes place. The liquid superheated iron enters the chamber in a continuous stream through channel D on the left, and the excess iron flows back into the furnace through channel E. The liquid residues are constantly drawn off through the opening K at the right-hand end of the chamber. The first crushed ore mixture, the screen and the solvent, is constantly thrown into the furnace through the vertical shaft B placed on the left-hand end of the chamber, falls into the stream of metal and is carried away by it. In the case of the exemplary embodiment shown, the flow movement is communicated to the flowing metal by a paddle wheel F made of graphite or the like, which is arranged in the connecting channel E. It is well known that zinc is obtained in the form of vapors when it precipitates. The vapors are withdrawn through the pipe LM. In order to prevent zinc vapors from escaping from chamber A , the chamber must be hermetically sealed. For this reason the channels are deepened so that the ceiling of the channels is lower than the level of the molten iron in the furnace, so that the channels are always completely filled with the metal flow and the escape of zinc vapors into the furnace is reliably prevented . For the same reason, the end wall of the chamber is pulled down like a tongue immediately behind the draw-off opening K for the residues and slag, so that the lower edge of the tongue is immersed in the liquid mass and an airtight seal is formed. In the feed chute B , a roller W designed as a tap is rotatably mounted to seal the insertion opening tightly; trough-like depressions are cut out in the jacket of the roller in such a way that by rotating the roller a precisely measured amount of the comminuted mixture is thrown into the chamber; With this arrangement, the loading can be regulated in a simple manner by appropriately dimensioning the number of revolutions of the roller. Such feed rollers are known per se. The flow movement could also be communicated to the liquid metal in some other way instead of by means of the paddle wheel F , for example by means of a type of pump or screw. Of course, other ores can also be used as a screen by means of the arrangement described are smelted, for example zinc oxide, zinc silicate, galena, etc. In the Smelting of oxidic zinc ores is used as a solvent appropriately a mixture applied, which consists of sulfur iron and slaked lime; to 100 parts of the too processing ore should come about 50 parts of iron sulphide and 10 parts of lime. When ores containing zinc and lead are smelted using the prescribed process, the lead initially remains in the sulfuric iron that forms the residue and is withdrawn through opening K (as well as any silver and the like). In this case, the lead is precipitated from the residue in a special operation, again using iron as a precipitant and a mixture of iron oxide and slaked lime as a solvent. If it is a matter of smelting galena and the like, the ML pipeline is not required, since, as is well known, the lead is not obtained in a vaporous, but in a liquid state when it is precipitated. Godfather nt-A ν Proverbs: i. Device for the extraction of zinc, lead and the like from their sulfur and oxygen compounds by precipitation with iron, manganese or the like with the addition of substances that facilitate liquefaction, so-called solvents, in uninterrupted operations, characterized by one with an overheating furnace (C) for the precipitated metal through a feed duct (D) and a return duct (E) connected to elongated chamber (A), over one end of which a tightly sealing device (B) for introducing the feed consisting of ore and solvents is attached, and at the other end of which apart from the duct ( E) there are vent openings for the precipitated metal (LM) and the residues (K) that are sealed off from the atmosphere. 2. Apparatus according to claim i, characterized in that to prevent the in the chamber (A) developing metal vapors after the superheater furnace (C) of the supply and return duct (D and E) for the liquid precipitation metal are placed lower than that Level of the precipitated metal in the chamber (A) and in the superheater furnace (C). 3. Apparatus according to claim 1 and 2, characterized in that for the purpose, to seal the chamber airtight from the outside, the end wall of the tap opening for the residues Chamber behind this opening is pulled down like a tongue, so that the ' Immersing the tongue in the liquid mass. 4. Apparatus according to claim 1 to 3, characterized in that the precipitation metal is communicated the flow movement by a preferably in one of the two connecting channels (D, E) arranged paddle wheel or a worm made of graphite 0. 1 sheet of drawings.