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INVENTION
Patent of the Russian Federation RU2032070
METHOD OF LEACHING USEFUL COMPONENTS FROM ORE
The name of the inventor: Dolgikh Polikarp Fedorovich [RU]; Bubnov Vasily Karpovich [KZ]; Goldyrev Sergey Arnoldovich [KZ]; Evseev Leonid Ivanovich [KZ]; Bereza Valentin Matveyevich [KZ]; Namsaraev Ananda Tsydandergenovich [KZ]
The name of the patent owner: Production Association "Tselinny Mining and Chemical Combine" (KZ)
Address for correspondence:
Date of commencement of the patent: 1991.11.04
The invention can be used in the extraction of minerals from fine-grained mining raw materials of slurries, clay materials, and the like. The method includes alternating the cycles of heating and cooling of ore raw materials, and irrigation with leaching solutions. Metals containing metal hydroxides, for example sediments for neutralizing hydrometallurgical processes, precipitations of water stations containing hydroxides of iron, aluminum, manganese, are introduced into ore raw materials.
DESCRIPTION OF THE INVENTION
The invention relates to the field of mining, in particular to geotechnological methods for the extraction of useful components, and can be used in leaching of colored, noble, rare and dispersed elements from clay ores, fine sludges and tailings of concentrating mills.
Known is a method for preparing clay ore, associated with their agglomeration before heap leaching [1], consisting in adding to the dry ore concentrated acid, astringent and water, mixing in a rotating drum.
The disadvantages of the above method are: the need for a uniform fine fraction in the preparation of agglomerates; The introduction of additional operations (grinding, mixing, pelletizing, drying), requiring additional equipment.
The method closest to the claimed solution for the technical essence and the result achieved is a method for leaching useful components from ores, associated with a periodic, alternating with heating, freezing (cooling) of the leached ore [2].
The main disadvantage of this method is a limited field of application, mainly for fixing non-tracking ores. When using this method for leaching clay ores, its efficiency is low, since the physicochemical processes occurring in clay ore during freezing and subsequent settling (in particular, coagulation, which leads to an improvement in the filtration properties of the clay mineral) are reversed (peptization occurs - A phenomenon opposite to coagulation, as a result of which the ore again loses its filtration properties).
The object of the invention is to eliminate these drawbacks.
The goal is achieved by the fact that during the preparation of this type of ore raw material, it is additionally introduced into the process by geotechnical methods (for example, heap leaching) into which metal hydroxides are introduced; Among these compounds, aluminum, iron, manganese hydroxides are used; As hydroxide-containing substances, sediments are used to neutralize hydrometallurgical processes (for example, the same heap leaching) or water treatment deposits at waterworks; These substances are administered before the start of freezing.
Example 1 . In laboratory tests, two identical samples of clay molybdenum ore weighing 5 kg each were taken and the following operations were carried out:
A) sample I treated with aluminum sulfate solution, loaded into a laboratory percolator and leached with carbonate-containing (10 g / l Na 2 CO 3 and 5 g / l NaHCO 3 ) solutions;
B) sample II is prepared by kneading this ore with a leaching solution and a precipitate containing iron hydroxide, placed in a percolator, after which it is frozen at t = -5 ° C and then thawed at room temperature (18-10 ° C), and then Leaching with the same solution.
Leaching results are shown in the table.
Example 2 . The mined clay ore is divided into two streams, the clastic fraction is washed from the sludge and transported to the KV site, where it is placed on a waterproof base and leached. Clay fraction is combined with washed slimes, mixed with precipitates containing hydroxyl compounds, for example, aluminum and iron (neutralization pulp of quarries sorption of sulfuric acid leaching); The resulting mixture is transported to another site of the KV, where it is frozen (for example, in the winter period, i.e., naturally), and then thawed in summer, after which its irrigation with leaching solutions begins.
The invention makes it possible to expand the scope of the method and increase its efficiency in the processing of clay ores, and to utilize a part of the sediments for neutralizing the effluents of hydrometallurgical and chemical industries.
CLAIM
1. METHOD OF LEAVING UTILITY COMPONENTS FROM ORES, including alternating with heating the freezing of leachable ore and its irrigation with leach reagent solutions, characterized in that, in order to increase the leaching efficiency of the clay ore material, substances containing metal hydroxides are introduced therein.
2. A method according to claim 1, characterized in that as precipitates of neutralization of hydrometallurgical processes, hydroxide-containing substances are used.
3. A method according to claim 1, characterized in that the precipitates of waterworks are used as hydroxide-containing substances.
4. The method of claim 1, wherein among the metal hydroxides, iron, or aluminum, or manganese hydroxides or combinations thereof are preferably used.
5. The method of claim 1. 1 to 4, characterized in that the hydroxide-containing substances are introduced prior to the start of the freezing.
print version
Date of publication 15.03.2007гг
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