CS256130B1 - Method of manganese concretions' treatment by means of ammoniacalcarbonate process connected with manganese extraction - Google Patents

Abstract

This method is an application in the field of metallurgy. It is a complex technology for obtaining manganese, copper, nickel, and cobalt. The method is conceived in the following way: after reduction, the roasted manganese concentrate is extracted in the absence of air at temperatures of 20-40 degrees C for 3 to 90 minutes by a solution which contains in g/l 80 - 270 ammonia, 30 - 170 carbon dioxide. Then the obtained pulp is separated into a solution from which through aeration for 30 minutes to 8 hours the manganese and slime fractions are separated; in the next processing stage the well known ammonia-carbonate extract of copper, nickel and cobalt is obtained.

Description

The present invention relates to a process for the treatment of manganese nipples with ammoniacal carbonate processes associated with manganese recovery.

Until now, only metals such as copper, nickel and cobalt can be obtained using ammoniacal carbonate technology for manganese nip processing, while manganese remains unused in the leach.

The direct use of the leach with a manganese content of 14 to 32% by weight as a manganese additive in metallurgical products is limited.

Obtaining manganese concentrates from the slag using acidic methods such as leaching with sulfuric acid, hydrochloric acid, sulfur dioxide at normal or elevated pressure, in turn, requires a considerable increase in processing costs.

The above-mentioned drawback removes the method of treating manganese nipples by the ammonia-carbonate process associated with the manganese extraction process according to the invention, characterized in that the manganese nipples are leached with ammonia-carbonate solution at a concentration of 80 to 270 gl ¹ ammonia and 30 to 170 gl ^{1 of} carbon dioxide in the absence of air in a closed vessel equipped with a stirrer at a ratio of liquid phase to solid phase 2 to

10. Leaching is carried out at 20 to 40 ° C for 3 to 90 minutes. After leaching, the mash is pumped into a sedimentation tank, where in the absence of air, the phases are separated into a solution and a sludge fraction containing 50% by weight of the solids. From the sedimentation tank, the solution is pumped through a closed pipeline for control filtration and from there still in the absence of air into an aeration tank equipped with a stirrer and a ring with nozzles for uniform aeration at the bottom. The resultant solution aeration, which lasts from 30 minutes to 8 hours, is manganese in the form of an insoluble manganese carbonate containing compound. The manganese depletion solution is used in a further portion of the manganese nipple processing to recover copper, nickel and cobalt by a known ammoniacal carbonate process from a solid fraction of the sludge fraction which remains after leaching the reduced manganese nipples in the absence of air.

The advantage of said process is that by extending the ammonia-carbonate technology of manganese nipple processing to a portion of the leaching of reduced manganese nipples in the absence of air, manganese is also obtained in addition to copper, nickel and cobalt. Manganese is easily eliminated from the solution by aeration in the form of manganese carbonate. After removal of manganese, the ammoniacal carbonate solution is used in another part of the treatment of manganese nipples in the leaching of copper, nickel and cobalt by the known ammoniacal carbonate process. It is also an advantage that manganese elongation positively affects the yield of cobalt in the next part of the leaching of the manganese nipples. Originally, the three-component technology has been converted to a four-component technology, which allows for a more comprehensive use of the raw material with a minimum increase in investment costs.

Example 1

Manganese nodules containing 29% by weight Mn were leached after reducing roasting in the absence of air with an ammonia-carbonate solution having a concentration of 190 g / ^{l of} ammonia and 110 g / ^{l of} carbon dioxide for 10 minutes at 20 ° C. After filtering off the insoluble residue, manganese precipitated out of the solution after about 3 hours. The manganese yield was 51%.

Example 2 '

Manganese nodules with the same manganese content as in Example 1, after reduction roasting leached under air-karbonátovýrn ammoniacal solution of a concentration of 200 gl gl ammonia and 85 ¹ of carbon dioxide for 30 minutes at about 20 ° C. After filtering off the insoluble residue, manganese was removed from the solution by aeration for about 5 hours. The manganese yield was 57%.

Claims (2)

OBJECT OF THE INVENTION A process for the treatment of manganese nipples by an ammoniacal carbonate process associated with manganese extraction, characterized in that the manganese nipples are first leached after reduction roasting in the absence of air with a solution containing 80 to 270 g.l of ammonia and 30 to 30 g. 170 g / ^{l of} carbon dioxide, at a temperature of 20 to 40 ° C and a liquid to solid phase ratio of 2 to 10 for 3 to 90 minutes, then the mash is separated into a solution from which it is aerated for 30 minutes to 8 hours manganese and sludge fraction, from which honey, nickel and cobalt are obtained in the next stage of treatment by known ammoniacal carbonate leaching. ² 2. The process according to claim 1, wherein the ammonium carbonate solution is used for leaching copper, nickel and cobalt from the solid fraction of the sludge fraction after leaching the reduced manganese nubs in the absence of air after manganese has been eliminated by aeration.