Autoclave and method for pressure oxidation
An autoclave and pressure technology, which is applied in the field of autoclave, can solve problems such as the effectiveness of the autoclave leaching process, and achieve the effects of improving the overall mixing performance, reducing fouling, and reducing the wear rate of the impeller
Pending Publication Date: 2021-04-16
METSO OUTOTEC METALS OY
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Problems solved by technology
[0005] However, questions remain about the effectiveness of autoclave and leaching processes
Method used
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[0051] figure 1 is a schematic side view, partially in cross-section, of an autoclave and process for pressure oxidation of slurry-like material comprising at least one sulfide material.
[0052] The autoclave 100 comprises a pressure vessel 1 which is a horizontally arranged cylinder. The diameter of the pressure vessel 1 is usually in the range of 1.5m-7m. Slurry material to be oxidized is fed into the pressure vessel 1 through the inlet 5 , while oxidized slurry is removed from the pressure vessel through the slurry discharge channel 13 .
[0053] It should be noted that the pressure vessel 1 may comprise heating means or cooling elements or both for controlling the temperature of the slurry material in the pressure vessel 1 .
[0054] The pressure vessel 1 comprises at least two compartments (in the illustrated embodiment four) 2a-2d arranged horizontally one behind the other and separated by generally vertically arranged partitions or walls. 3 separated. The partition...
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Abstract
An autoclave and a method for pressure oxidation of a slurry material comprises at least one sulfide material. The autoclave includes a pressure vessel for receiving the slurry material. The pressure vessel includes compartments arranged horizontally one after the other and separated by one or more partitions. Each compartment is provided with an upper edge or at least one opening, which defines the liquid level of the slurry material in the compartment. An inlet for supplying oxygen-containing gas into the pressure vessel is arranged. A stirrer device arranged for stirring the slurry material in at least one of the compartments at least upper impellers and lower impellers. The impellers are arranged in a vertically arranged shaft. The upper impellers are arranged at a height above the middle position of the one of the compartments, and the upper impellers are axial flow impellers or mixed flow impellers that pump upward.
Description
technical field [0001] The present invention relates to an autoclave for the pressure oxidation of slurry-like material comprising at least one sulphide material. [0002] The invention further relates to a method for the pressure oxidation of a slurry-like material comprising at least one sulphide material. Background technique [0003] The pressure oxidation (POX: Pressure oxidation) process is a common hydrometallurgical process, which is carried out at relatively high temperature and pressure to leach various sulfide minerals containing iron, nickel, cobalt, zinc or copper. A typical pressure leaching configuration comprises a multi-compartment horizontal tank, ie, an autoclave, including one or more agitators. [0004] The leaching process requires large amounts of oxygen, which is usually supplied as pure oxygen gas or oxygen-enriched air to the bottom of the tank below the agitator. Alternatively, the gas can be fed through the stirrer. [0005] However, questions ...
Claims
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IPC IPC(8): B01J3/04
CPCC22B3/02B01J19/18B01J19/006B01J19/0066B01J2219/00182B01J2219/182B01J2219/00768B01J2219/00779B01J3/04C22B3/06C22B19/22C22B15/0067C22B23/0415Y02P10/20C22B3/04C22B15/0065C22B19/20C22B23/0407
Inventor M·拉特瓦-科科A·萨里科斯基P·伊莫宁T·里塔萨洛
Owner METSO OUTOTEC METALS OY