The method of extraction from ores diamonds

 

(57) Abstract:

Usage: mineral processing, in particular diamond ores. When extracted from ores diamonds before chopping its ore crushed to a particle size greater than the particle size of the diamonds placed outdoors in the form of territorial and on the South side slopes of the waste rock dumps, a protective layer, can withstand ore to softening pieces in its upper layers. The upper layers of the ore after softening periodically raked down. Grinding ore is implemented by crushing razuprochneniya pieces of treads for heavy-duty vehicles, such as bulldozers-rippers, with the subsequent removal of the ore small and slime fractions, neosmechennye the remainder is placed in a thin layer on a solid floor and crush heavy roller with rough surface. The extraction of diamonds from the crushed ore is realized by means of VIBROCONTROL with a yielding surface. Tails and the bottom product of VIBROCONTROL sent to the dump. The surface layer of ore on merriconeag and dumps periodically irrigate when the temperature is above zero sprayed water and water with added surface-Akti retrieval. 1 C.p. f-crystals.

The invention relates to the field of mineral processing, in particular to the enrichment of diamond ores, and can be used in the processing of other types of metallic and non-metallic materials.

There is a method of extraction from ores diamonds, including samoizmenenie ore on an open cycle, with subsequent fractionation by size, removing a large diamond luminescent separation, small diamond foam separation, regrinding large and medium fractions tail products in the SAG mill in closed circuit with the following additional extraction of small diamonds foam separation and output tails foam separation and obtained during autogenous grinding sludge in the blade /1/.

Despite the high efficiency of the practical use of the method /1/, it is not without disadvantages, which lead under certain conditions to reduce preservation of natural size and quality of some varieties of diamonds and their incomplete removal. In particular, the process autogenous grinding ore still does not provide sufficient security of diamond crystals, primarily related to the category of technical, such as polycrystals, platinumiridium crystals, not retrieved fluorescent separation and, ultimately crushed when circulating tail products through autogenous mills, as these mills are elements impact on the diamond crystals, especially when chopping durable types of ore.

The disadvantages of this method can also be attributed to its relative complexity, power requirement and a sufficiently large value in the practical implementation, which may cause delays with the development of both large and small outlying fields and fields with a low diamond content.

The closest in technical essence and the achieved result is the method of extraction from ores diamonds, including ore grinding with subsequent fractionation by size, removing a large diamond luminescent separation, removing small diamond foam separation, regrinding large and medium fractions tail products in the SAG mill in closed circuit with the following additional extraction of small diamonds foam separation and output tails foam separation and obtained during autogenous grinding sludge in the blade. In this way, the medium krupnolistnaya using attrition mills, foam separation carried out in conjunction with pneumothoracies with the return of most coarse tailings to the final processing in attrition mills /2/.

Way /2/ more efficient way of /1/. However, he repeats some of the drawbacks inherent in the way /1/ as for the preservation of diamonds and their extraction. Similar to the way /1/, the disadvantages of the method /2/ can also be attributed to the relative complexity, power requirement and a sufficiently large value in its practical implementation, which also hinders the development of remote kimberlite pipes and tubes with a low diamond content.

The aim of the invention is the preservation of the natural size and quality of diamonds by improving the conditions of their disclosure, as well as the simplification and cost reduction technologies for their extraction.

This objective is achieved in that in the method of extraction from ores diamonds, including ore grinding with subsequent fractionation by size, extraction of diamonds with the subsequent withdrawal of tailings dump, before chopping its ore crushed to a particle size greater than the particle size of the diamonds placed outdoors in the form of territorial and on the South side slopes of the waste rock dumps,E. softening periodically raked down grinding ore is implemented by crushing razuprochneniya pieces of treads for heavy-duty vehicles, such as bulldozers-rippers, with the subsequent removal of the ore small and slime fractions, neosmechennye the remainder is placed in a thin layer on a solid floor and crush heavy roller with rough surface, the extraction of diamonds from the crushed ore is realized by means of VIBROCONTROL with a yielding surface, tails and the bottom product which is sent to the blade, the surface layer of ore on merriconeag and dumps periodically irrigate when the temperature is above zero sprayed water and water with added surfactants.

When creating inventions, the author proceeded from the next.

For the preservation of natural size and quality of diamonds it is necessary to provide such conditions in their disclosure of ore, which would eliminate completely the elements impact on the diamond crystals. Such conditions are provided in the natural decomposition of the kimberlite during long being outdoors when ensure complete safety of diamonds as natural size and quality.

The intensification of the natural destruction of the kimberlites can be achieved by maximizing the free surface ore material for direct exposure to natural destructive factors. For this mined ore rationally lay close to or near the field in the form of numerous territorial and positioning ledges on the side surface of the overburden dumps, facing the Sunny side. The side surface of the overburden dumps, it is advisable to cover with a protective metal mesh, or any other similar way. Terrachoice can be as pie, cone and spinal and their optimal interleaving, so that the side surface of territorial facing the Sunny side, was the greatest. Mined ore prior to its placement on merriconeag and from which upnote, using a typical mobile crusher that is rational to increase the free surface of the ore particles.

Taking into account that the decomposition of kimberlites is more intense at the most contrasting day and night temperatures in spring and autumn, when a cycle of freezing and thawing of the ore particles greatest, it may be rational in some cases to use a special reflective mirrors to intensify the solar radiation and directed its impact on the surface of the ore mass. In the summer months when solar radiation and maximum and intensity (Northern latitudes) by time of day, rationally periodically irrigate the surface layer of kimberlite piles water (similarly as it is done in heap leaching) with the addition of surface-active substances for wedging action microcracks (method of academician P. A. Rehbinder), which is quite rational to intensify the natural decomposition of kimberlites at the time the alternating temperature deformations of the particles.

For transporting crushed ore on terrachoice and ledges on the slopes of the overburden dumps with seasport, ropeway or cable car hauling in skips or trolleys (if necessary in combination with vehicles), and for periodic removal of the top layers razuprochneniya and destroyed kimberlites and move them down the slope - scraper winch or other similar simplicity and efficiency of the equipment.

Removed the top layer razuprochnenie kimberlite can then easily destroy mechanically by rolling large heavy roller with tuberous (protector of the small wear of the cones). Such weighted rink rationally move (laminating) by winches on the large metal tray, razuprochnenie kimberlite at which place monocline or thin layer. If necessary, it is also possible for pre-crushing razuprochnenie kimberlite to use heavy tracked vehicles type bulldozers-rippers. After mechanical destruction razuprochneniya kimberlites open diamonds can be identified in a separate product with vibrocorrelation the patent of the Russian Federation 2172650 or patent of the Russian Federation on the application 2000110974/03 with a positive decision from 05.02.2002 g. the Use of these vibrocone is the quiet should be stored in dry form in a saved dump, using the same form of transport. All operations of pretreatment and preconcentration, as well as the transportation of ore and enrichment products, it is advisable to mechanize and run as separate modular units by analogy with the sluice boxes.

It should be noted that under certain advantages of this method, primarily to ensure the complete safety of the diamond crystals due to the natural decomposition of kimberlites, low power consumption, low capital cost and potential sufficient for practical implementation only means of small mechanization, mobile and modular units, the proposed method of processing and "dry" enrichment kimberlites remote fields has its inherent disadvantages, primarily with climatic seasonality and relatively low productivity, which in turn can be increased by increasing the areas of natural decomposition of kimberlites, namely, by increasing the number of territorial and ore dumps. To increase performance and processing stages in the summer months can be used is the Arata large unit performance and is suitable for implementation gravity separation.

In the end, it follows that for industrial use of the method of the natural decomposition of kimberlites is necessary to create conditions for intensification of the process of natural decomposition. Such conditions may include: maximizing the surface of the degradable particles of kimberlite, the increasing impact of natural factors on its decomposition, the introduction of artificial influences, accelerating the natural destruction of kimberlite, etc.

A specific example of the invention

The method of extraction of diamonds from the ore is implemented "on Board" quarry near field and in the immediate vicinity in an open area using the most economical means of transport for the movement of ore, small tools and mobile and mobile modular units.

Extracted from the quarry crushed ore to a particle size of 50-70 mm with the use of standard mobile crushing plants and placed near or next to the field in the form of numerous territorial and have ledges on the side surface of the overburden dumps, facing the Sunny side. Side surfaces of the overburden dumps has preliminarily the x optimal alternations, so that the side surface of territorial facing the Sunny side, was the greatest. In the warm time of day when the temperature is above zero, the surface layer of ore periodically irrigated with water spray and water with added surfactants for wedging action microcracks at the time the alternating temperature deformations of the particles.

For transporting crushed ore on terrachoice and ledges on the slopes of the overburden dumps with a protective coating use cheap forms of transport: pipeline transportation, cable car or cable car hauling in skips or trucks (in combination with vehicles). For periodic removal of the top layers razuprochneniya and destroyed kimberlites and move them down the slope, use a scraper winch.

Removed the top layer of ore destroy by crushing razuprochneniya pieces of caterpillars heavy bulldozers-rippers and then through screening are removed from the ore small and slime fractions. Neosmechennye balance place a thin layer on a large metal tray or other solid surface and crush heavy roller with bovista surface, tails and the bottom product which is directed in the "dry" state in the intact blade, using the same modes of transport. All operations of pretreatment and preconcentration, as well as the transportation of ore and enrichment products, mechanismsmyth and are in the form of a mobile modular units.

Thus, the proposed technical solution in comparison with the prototype will allow us to preserve the natural size and quality of diamonds, as well as to reduce the cost of technology retrieving, by improving conditions for the disclosure of diamonds and simplifying the technology.

Sources of information

1. Zlobin M. Ways of improvement and modernization of technological schemes enrichment diamond ores. Non-ferrous metals, 1968, S. 14-18.

2. Patent of the Russian Federation 2063813, CL 03 In 9/00, 1993 (prototype).

1. The method of extraction from ores diamonds, including ore grinding with subsequent fractionation by size, extraction of diamonds with the subsequent conclusion of the tails in the blade, characterized in that before chopping its ore crushed to a particle size greater than the particle size of the diamonds placed outdoors in the form of territorial and on the South side slopes of the waste rock dumps, covered semicritical raked down grinding ore is implemented by crushing razuprochneniya pieces of treads for heavy-duty vehicles, such as bulldozers-rippers, with the subsequent removal of the ore small and slime fractions, neosmechennye the remainder is placed in a thin layer on a solid floor and crush heavy roller with rough surface, the extraction of diamonds from the crushed ore is realized by means of VIBROCONTROL with a yielding surface, tails and the bottom product which is sent to the dump.

2. The method according to p. 1, characterized in that the surface layer of ore on merriconeag and dumps periodically irrigate when the temperature is above zero sprayed water and water with added surfactants.

 

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