RU2281809C2 - Ore benefication mobile modular complex - Google Patents

Ore benefication mobile modular complex Download PDF

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RU2281809C2
RU2281809C2 RU2004125313/02A RU2004125313A RU2281809C2 RU 2281809 C2 RU2281809 C2 RU 2281809C2 RU 2004125313/02 A RU2004125313/02 A RU 2004125313/02A RU 2004125313 A RU2004125313 A RU 2004125313A RU 2281809 C2 RU2281809 C2 RU 2281809C2
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Russia
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module
benefication
ore
centrifugal
enrichment
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RU2004125313/02A
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Russian (ru)
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RU2004125313A (en
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Андрей Иннокентьевич Матвеев (RU)
Андрей Иннокентьевич Матвеев
Анатолий Никифорович Григорьев (RU)
Анатолий Никифорович Григорьев
Фома Михайлович Федоров (RU)
Фома Михайлович Федоров
Иван Феликсович Лебедев (RU)
Иван Феликсович Лебедев
Василий Романович Винокуров (RU)
Василий Романович Винокуров
Евгений Степанович Львов (RU)
Евгений Степанович Львов
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Институт горного дела Севера им. Н.В. Черского СО РАН
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Abstract

FIELD: benefication of minerals, in particular processing of quartz-vein type auriferous ores in small deposits and ore-bearing sites.
SUBSTANCE: mobile modular complex comprises ore preparation and contraction module including bar screen for preliminary ore screening, two-rotor inertial crusher operating in additional crushing mode of 350+100 mm class, combined percussion crusher for fine crushing, centrifugal counteraction impact-type grinder for main grinding stage, and gravitational benefication module including centrifugal "Knelson" type separators connected with each other in accordance with processing pattern and equipped with hydraulic spiral classifier and grinder. Gravitational benefication module comprises main benefication module including hydraulic classifier allowing three kinds of separation products to be obtained along 5 mm and 0.5 mm boundary, centrifugal "Knelson" type separator for benefication of small-sized classes, jigging machine for benefication of average-sized class of -5+0.5 mm and separating +5 mm sized class, as well as control benefication module consisting of centrifugal "Knelson" type separator connected according to processing pattern with hydraulic classifier and spherical mill for providing additional benefication cycle after additional opening of gold by additional grinding of granular +5 mm products and tailings of main benefication module, wherein discharge of end tailing products is performed during emptying of classifier.
EFFECT: increased efficiency in extracting gold into gravitational concentrate and reprocessing of small-scale auriferous ore deposits.
2 dwg

Description

The invention relates to the field of mineral processing, in particular to the processing of gold-bearing ores.
A known complex for processing gold-bearing ores of predominantly small deposits, including a crushing module, a grinding module and a gravity module, installed in the course of the technological process and interconnected by vehicles, made in the form of two plants of the main and control stage of enrichment, carried out on two Knelson 30 centrifugal separators "And in hydrocyclones with supply, drain and sand nozzles connected through a grinding module to a closed loop with installation the main stage of enrichment with the supply and sand nozzles, respectively, and a drain pipe with the installation of the control stage of enrichment, the module for finishing the concentrate to the golden head, located behind the gravity module, consisting of a concentration table, a vibrating mill for regrinding the tailings of the table, a centrifugal separator and a bowl concentrator [1].
The disadvantages of this complex are the complexity of the technological scheme, the bulkiness and metal consumption of the ore preparation unit and the associated lack of mobility, a high level of operating and capital costs when processing ores of simple material composition with relatively large gold.
An ore-dressing mobile modular complex for processing gold-bearing ores of predominantly small deposits is also known, including ore preparation and reduction modules installed along the technological process and interconnected by vehicles, including a pre-screening grate, a two-rotor inertial crusher operating in the mode of refinement of -350 mm class, combined impact crusher for fine crushing, centrifugal crusher for basic th stage of grinding, the gravity concentration module, consisting of two centrifugal separators of the Knelson type for the main and control concentration, connected to each other according to the technological scheme with a spiral classifier and a ball mill, which form a cycle of regrinding of granular products, where tail products are withdrawn from discharge of the classifier [2].
The disadvantage of this complex is that the enrichment module does not fully meet the requirements of mobility and rationality of separation processes. The level of gold disclosure after the ore preparation and reduction module reaches, depending on the material composition and physical and mechanical properties of the ore, up to 90-95%. During ore disintegration using apparatuses by the shock principle of action, the nature of the disclosure of gold occurs with the preservation of its natural form. Moreover, for quartz-vein ores with coarse-grained gold, the yield fraction of the relatively large fractions of gold uncovered increases significantly. Enrichment gravity apparatuses for effective work need preliminary classification, while gold fractions larger than 0.5 mm are quite effectively extracted, for example, by depositing methods.
The technical result is an increase in the total degree of gold extraction into a gravity concentrate and efficiency in the processing of small gold-bearing ore deposits, is achieved in the proposed ore dressing modular complex, consisting of an ore preparation and reduction module, including a preliminary grate grate, a two-rotor inertial crusher operating in the refining mode -350 + 100 mm, combined impact crusher for fine crushing, oncoming centrifugal grinder shock for the main stage of grinding, and the gravity concentration module, including centrifugal separators of the Knelson type, connected to each other according to the technological scheme with a hydraulic spiral classifier and grinder, while the gravity concentration module includes a main concentration module consisting of a hydraulic classifier with the possibility of obtaining three separation products along the border of 5 mm and 0.5 mm, a Knelson-type centrifugal separator for enrichment of small size classes, depositing ma the lines for enrichment of the intermediate particle size class -5 + 0.5 mm and separation of the particle size classes +5 mm, as well as a control enrichment module, consisting of a Knelson centrifugal separator connected in accordance with the technological scheme with a hydraulic classifier and a ball mill to form an additional cycle enrichment after additional disclosure of gold by regrinding granular products +5 mm and tails of the main enrichment module, in which the final tail products are removed with the discharge of the classifier.
The present invention, in contrast to the accepted counterpart [1], allows you to create technological modules with a high degree of mobility and autonomy. In this case, the functional separation of the enrichment module into small modules occurs. The fine grinding ball mill is used exclusively to reveal the finely disseminated fraction and “bound” gold after the extraction of large and medium-sized gold in a separate module. Thus, the deformation and regrinding of gold of larger fractions is excluded in the technological scheme adopted in the invention [1] at the ball grinding stage. On the other hand, in the present invention, the target direction of fractions with undetected metal for regrinding with a closed cycle with classification and control enrichment is provided. Thus, the present invention meets the criterion of "novelty."
In contrast to the adopted prototype [2], the functional separation of the main enrichment stage into two modules: the main enrichment module and the control enrichment module makes it possible to separate the bulk of free gravitational gold separately by size classes using different types of equipment, for example, deposit 5 + 0.5 mm and centrifugal concentration of -0.5 mm, without the use of ball grinding. The presence of a control enrichment module allows one to technologically distinguish the process of additional disclosure of predominantly fine and fine gold from the tails of the main enrichment module. This allows to significantly improve and rationalize the ore beneficiation process of predominantly small deposits, using the autonomous operation of the proposed modules in the absence of the need to build a stationary factory.
Thus, the present invention meets the criterion of "inventive step".
The invention is illustrated in the drawing, which schematically shows a General view of the complex (figure 1).
The complex for processing gold-bearing ores according to the gravity concentration scheme contains technological modules with symbols A, B and C, with the possibility of sequential processing of ore in each module and interconnected by means of transporting solid crushed material. At the same time, the possibility of autonomous operation allows organizing the storage of processing products after each module.
Module A is intended for crushing and grinding the initial ore -350 mm to a fineness of 35% of the class -0.1 mm and consists of a hopper with a feeder 1, a belt conveyor 2, a grate-mounted screen 3, a two-rotor inertial crusher (RID2-1000) 4, and an elevator reloader 5, inertial screen 6, combined impact crusher (DKD-300) 7, counter-impact centrifugal grinder (TsMVU-800) 8 and POS-2000 pneumatic separator (9).
The pneumatic separation concentrate of module A is stored and then transported to module B and pulpized in the sump of the sand pump 13 of module B.
Module B is intended for classification and separate enrichment by size classes of native free gold uncovered from ore mass on module A and consists of a sump pulp 10, a hydraulic (spiral) classifier 11, a diaphragm depositor 12, a sand pump 13, a centrifugal separator of the type Knelson "14.
Module B is intended for centrifugal separation according to density in an aqueous medium of schlichy (primary enrichment) and finely disseminated gold after regrinding of the sand fraction of the tailings and classification to a grinding fineness of 85-90% class - 0.074 mm on a ball mill 15 (control enrichment) and consists of a control sump enrichment 16, sand pump 17, control enrichment on a centrifugal separator type "Knelson" 18, spiral classifier 19.
The complex is equipped with a water supply, energy supply system and control panel, containers for collecting and transporting concentrate (not shown).
The first module is an ore preparation module, including crushing and reduction of the initial ore by pneumatic separation. Light and slimy particles released during dry impact crushing and grinding should be removed.
The second module is a module for the classification and separate enrichment according to size classes (two classes) of native free gold, disclosed in the first.
The scheme of the third module is designed for additional opening of thin gold and enrichment in a centrifugal separator of the Knelson type. In this module, it is possible to obtain a gold-containing concentrate, which is a product of further processing, tailings, depending on the quality, can be dumped or subject to further processing in the next technological module, etc.
The diagram also shows the absence of circulating and intermediate flows between cycles, except for the separation products of the same name (concentrates and tails). Depending on the quality of the processed products, the technological modules can be independently switched on or off from the enrichment process. In the absence of coarse gold in the ore, module B can be turned off. And with the predominance of only large-dispersed ore in the ore, the need for the expediency of ore dressing in module B.
The complex works as follows. The initial ore with a grain size of 350 mm is fed from the hopper of the feeder 1 by a belt conveyor 2, equipped with an electromagnetic iron separator, to the grate screen 3 and is screened according to the size class of 100 mm. The plus product enters the two-rotor inertial crusher 4, where pieces of the original rock are destroyed to a particle size of -40 mm. The minus screening product and the crushed product of the rotor crusher with the elevator reloader 5 are fed to the inertial screen 6 for screening in the 5 mm class, from where the plus product is sent to the DKD-300 combined-action crusher 7. Here the pieces are crushed from 40 mm to 90% of the -2 mm class. The minus product of the screen is fed to the centrifugal counter impact mill ЦМВУ-800 8. In the first rough grinding step in the ЦМВУ-800 a fineness of 50% class - 0.074 mm is achieved. This product is subjected to pneumatic separation on a POS-2000 pneumatic separator, the tailings of the pneumatic separation are dump, mainly the light and finely dispersed part (dust fraction) of the ore is blown.
The reduced concentrate is transported to module B.
The concentrate is pulped in sump 10, then fed to hydroclassifier 11, fine fractions are pumped to a centrifugal separator of the Knelson-20 type 14 (rotor diameter 20 inches) for main enrichment. The gold concentrate from the separator is discharged into the collection tank, and the tail pulp is discharged (transported) to the receiving sump of module B. Large fractions of hydroclassifier 11 are fed to the depositor. Concentrates of jigging machine 12 and centrifugal separator type "Knelson-20" 14 are combined and sent for refinement.
The tails of the jigging machine 12 and the Knelson-20 centrifugal separator 14 are combined and fed to the ball mill 15, the ball mill is discharged into the sump 16 of the sand pump 17 and enriched by the Knelson-20 centrifugal separator 18, the concentration tailings to the hydraulic spiral classifier 19. The boundary size of the classifier drain is a particle size of -0.074 mm. Material with a particle size of +0.074 mm constitutes the solid phase of the separation product in a spiral classifier, which enters the ball mill 15 for grinding and additionally revealing finely disseminated gold and is a circulating load. The regrinding of sands and subsequent enrichment in a centrifugal concentrator provides an increase in the through extraction of gold due to an additional additional opening of up to 80% yield of the class -0.074 mm. Draining of the spiral classifier is a waste product (tails).
The results of the calculation of the quantitative-qualitative scheme as applied to the ores of the Maltansky deposit in figure 2. On module A, waste can be removed with a loss of 3.33% of all gold with a gold content of 0.6 g / t. Coarse gold recovery up to 60% is possible in the module. Another 25% of fine gold can be recovered due to the additional disclosure of gold in module B. In this case, the gold loss will be 11.67%, with a content of 5.62 g / t. If necessary, tailings enrichment can be continued until conditionally poor tailings are obtained.
Thus, the proposed complex, due to the distinguishing feature made according to the invention, allows, when used, to separate the enrichment cycle of relatively large fractions of gold, where it is possible to isolate the bulk of the recoverable gold. Due to this, the rolling and grinding of large gold is excluded, as is the case in a ball mill in the analogue [1]. This makes it possible to increase the total recovery of gold in the gravity concentrate to 5%, which, when processing small ore gold deposits, makes it possible to increase the efficiency of processing gold-bearing ore.
The compactness, first of all, of the ore preparation equipment and the multiple reduction of waste rock mass at the stage of classification on a spiral classifier allows you to choose a small ball mill and thereby place process equipment in transportable modules.
References
1. Patent of the Russian Federation. RU 2055643 C1, 6 V 03 V 7/00. Fedotov K.V., Potemkin A.A., Beloborodov V.I. Gold ore processing complex.
2. Certificate for utility model of the Russian Federation No. 12990. Matveev A.I., Vinokurov V.P., Fedorov V.M., Novopashin M.D., Yakovlev V.B., Gladyshev A.M., Sleptsova E.S., Salomatova S.I., Eremeeva N. .G. IGDS SB RAS dated March 20, 2000

Claims (1)

  1. A mobile modular complex, consisting of an ore preparation and reduction module, including a preliminary grate grate, a two-rotor inertial crusher operating in a class finishing mode of 350 + 100 mm, a combined impact crusher for fine crushing, a counter impact centrifugal grinder for the main grinding stage , and the gravity concentration module, including centrifugal separators of the Knelson type, connected to each other according to the technological scheme with hydraulic by a spiral classifier and grinder, characterized in that the gravity enrichment module includes a main enrichment module consisting of a hydraulic classifier with the possibility of producing three separation products at the boundary of 5 mm and 0.5 mm, a Knelson centrifugal separator for enriching small size classes, depositing machines for enrichment of an intermediate particle size class of -5 + 0.5 mm and separation of particle size classes +5 mm, as well as a control concentration module consisting of a Knel centrifugal separator sleep "which is related to the technological scheme hydraulic classifier and a ball mill to form additional enrichment cycle after regrinding doraskrytiya gold granular products 5 mm and a basic module tails of enrichment, wherein the output tail end products made with drain classifier.
RU2004125313/02A 2004-08-18 2004-08-18 Ore benefication mobile modular complex RU2281809C2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104984818A (en) * 2015-07-16 2015-10-21 安徽东阳矿业科技有限公司 Method for purification of quartz sand ore in physical mode
WO2015167415A1 (en) * 2014-04-28 2015-11-05 Ирина Владимировна КАЗАРОВА Modular mining-enrichment complex
RU2634314C1 (en) * 2016-09-14 2017-10-25 Федеральное государственное бюджетное образовательное учреждение высшего образования "Забайкальский государственный университет" (ФГБОУ ВО "ЗабГУ") Flow line for enrichment of polymetallic raw material and isolation of finished product
WO2018209455A1 (en) * 2017-05-17 2018-11-22 Universidad Católica Del Norte Process for pre-concentrating and/or concentrating copper sulfide ores, precious metals and wasteusing gravitational concentration technologies
US10427166B2 (en) 2014-12-17 2019-10-01 Cidra Corporate Services Inc. Transportable modular system for enhanced mineral recovery, from tailings line and deposits

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015167415A1 (en) * 2014-04-28 2015-11-05 Ирина Владимировна КАЗАРОВА Modular mining-enrichment complex
US10427166B2 (en) 2014-12-17 2019-10-01 Cidra Corporate Services Inc. Transportable modular system for enhanced mineral recovery, from tailings line and deposits
CN104984818A (en) * 2015-07-16 2015-10-21 安徽东阳矿业科技有限公司 Method for purification of quartz sand ore in physical mode
RU2634314C1 (en) * 2016-09-14 2017-10-25 Федеральное государственное бюджетное образовательное учреждение высшего образования "Забайкальский государственный университет" (ФГБОУ ВО "ЗабГУ") Flow line for enrichment of polymetallic raw material and isolation of finished product
WO2018209455A1 (en) * 2017-05-17 2018-11-22 Universidad Católica Del Norte Process for pre-concentrating and/or concentrating copper sulfide ores, precious metals and wasteusing gravitational concentration technologies

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Effective date: 20170819