Technological mineralogy in qualitative appraisal of mineral raw material of natural and artificial origin

Будни технологической минералогии

2023-11-07T11:19:06+03:00

Прикладная минералогия уже давно в геологических науках заняла лидирующее положение. Еще В. И. Вернадский отмечал, что «…значение минералогической основы учения о рудных ископаемых чрезвычайно усилилось. Учение о полезных ископаемых является сейчас в своей основе, прикладной минералогией…». Он подчеркивал, необходимость создания базы для изучения полезных ископаемых, которые «неизбежно должны вестись на минералогической основе, а не на геологической»

Characteristics of altered volcanogenic material in connection with geologo-technological problems in the diamondiferous areas of the East Siberian Platform

2023-11-07T12:28:09+03:00

The results of the combined study of the pattern of geodynamic and hypergene changes in volcanogenic material in bedrock and upon transfer provided a basis for a scheme of mineral alteration provoked by the weathering of this type of rock sequences on the East Siberian Platform. Attention is focused on the behaviour of finely dispersed clayey minerals characteristic of various rock types in the above processes. In temperate climatic belts, especially in incomplete weathering profiles, erosion affected eluvial material, which (depending on the degree of alteration) displays distinctive structural-mineralogical characteristics retained upon quiet short-range transfer, upon accumulation in sedimentary basins and upon subsequent minor diagenetic alterations.

Mineralogo-technological characteristics of graphite ores on the Fennoscandian Shield

2023-01-23T10:41:52+03:00

Graphite is described as an important mineral used in modern high technologies. The background of the study of graphite ores on the Fennoscandian Shield is discussed. On the Fennoscandian Shield, flake graphite deposits have attracted great attention again due to their evolution dynamics and assessment in Norway, Finland and Sweden. Karelia (Ladoga Lake area) is a potential region for conducting research using up-to-date analytical methods for assessment of the superpurity of graphite.

Role of mineralogical studies in the development of combined tin ore processing technology

2023-11-07T12:31:04+03:00

The importance of conducting mineralogo-technological studies at tin deposits is discussed using ore from the Praviurminskoye deposit as an example. Data on the textural-structural characteristics, composition and mode of occurrence of valuable components are reported. They show that the ores are difficult to dress. It is shown why the application of technological mineralogy methods is essential at all stages in the development of tin deposits using up-to-date analytical methods.

Mineralogo-technological characteritics of rare-metal weathering crusts

2023-11-07T12:32:06+03:00

Modern problems in the mineralogical and technological studies of ores from rare-metal deposits are discussed. Attention is mainly focused on the specificity of the study and reworking of complex rare-metal materials. Some deposits are used are discussed to assess the results of the study of the mineralogical composition of rare-metal weathering crusts.

Technological geochemistry and mineralogy of highly complex V, U, Cu, Mo, Au, Ag, Pt, Pd, Se, Re, W, Sc, rare-earth (Y>Ce) ores combined in time and space – a new type of a polymineral-rare-metal raw material

2023-11-07T12:33:02+03:00

Two genetic types of uranium deposits: hydrogenic and polygenic in carbonaceous-siliceous schists were shown to occur in the Republic of Uzbekistan. A detailed study of the Rudnoe and Novoe highly complex polygenic uranium-vanadium deposits has revealed a geochemical system of elements in the form of cations and anions involved in the formation of the above deposits.

Potential of the EPR and LA-ICP-MS methods for qualitative appraisal of quartz as a raw material

2023-11-07T12:33:46+03:00

The results of studies of quartz carried out in the past few years using various methods are generalized. ESR and LA-ICP-MS methods can be used together to analyze quartz samples and to determine the forms of occurrence Al impurity in quartz matrix, which is hard to remove upon quartz conversion. The data obtained can be used for appraising the quality and purification potential of quartz.

The composition of ores of the Kutyn gold deposit

2023-11-07T12:34:43+03:00

The results of mineralogical and metallurgical study of selected geometallurgical samples of partially oxidized ores with low gold cyanide leaching recovery from Kutyn deposit are presented. The samples had carbonate-sericite-feldspar-quartz composition. Correlations between contents of minerals and elements indicate presence of six main mineral-elemental associations. Three classes of ore were distinguished based on arsenic oxidation degree due to significant variations in gold recovery by both flotation and cyanidation. Potential prediction model for gold recovery by flotation according to the ore composition was proposed.

Forms of apatite in Khibiny ores and their effect on dressing

2023-11-07T12:35:44+03:00

Major apatite grain shapes in apatite-nepheline ores, structures formed by apatite and the characteristics of mineral opening displayed upon ore grinding are discussed. It is shown that apatite is a basic ore mineral of ore. It is crystallized as an igneous mineral in panidiomorphic texture. It is a major texture in the ore, showing that it is easily destroyed due to the weak physical properties of apatite. However, the ore contains more complex associations occurring as poikilitic crystals of minerals, which are harder than apatite, such as nepheline, pyroxene and titanite. Poikilitic crystals carry fine apatite crystal inclusions. The presence of “poikilitic” apatite makes it hard to grind and open apatite.

Forms of gold in oxidized ore reworking products from the Maiskoe deposit

2023-11-07T12:36:38+03:00

The Maiskoye gold deposit occurs as part of a quartz-gold-sulphide formation in terrigenous rock sequences in Chukotka, Russia. Two main technological ore types: primary and oxidized were identified at the deposit. Oxidized ores are composed of quartz and mica with feldspar, scorodite, jarosite and sulphides. Gold in the oxidized ore of ore zone 1 is disseminated also in scorodite, oxidized forms of antimony and on coal. The main loss of metal in oxidized ore is due to the presence of scorodite, natural coal, non-metallic minerals and gold-bearing sulphides, which are intergrown with non-metallic minerals and also occur in free grains.

Geological and mineralogo-technological study of albitites from the Novye Peski gold deposit, Republic of Karelia

2023-11-07T12:37:53+03:00

The distinctive characteristics of rare-metal and rare-earth mineralization of albitites, revealed in the quarry of the Novye Pesky gold deposit (Ulyalega Ore Field, South Karelia), are discussed. The data obtained increase the application range of Novye Peski mineral products and various commercial minerals from the Ulyalega Ore Field.

Alteration of the mineral composition of gold concentrates during POX – Hot cure process

2023-11-07T12:38:42+03:00

Alteration of mineral composition of the POX treated gold concentrate during Hot Cure process was examined. The study was carried out on Hot Cure discharge with different exposure time. Significant decrease in the amount of basic ferric arsenates-sulfates and an increase for scorodite was noted with duration of the Hot Cure.

Garnet-group minerals in White Sea coast placers: composition, characteristics and diagnostics

2023-11-07T12:39:17+03:00

Data on the morphostructural characteristics of garnet-group minerals from sea coast placers in the Arkhangelsk region and the composition of inclusion in garnet are reported.

Chemical-metallurgical methods for processing of mineral products: mineralogical aspects

2023-11-07T12:40:09+03:00

Mineralogical aspects, responsible for the industrial properties of ores and their reworking products using an optimum method for chemical and metallurgical processing are discussed.

Perovskite and titanite as possible non-conventional sources of titanium: case study of the Afrikanda deposit

2023-11-07T12:41:15+03:00

Titanium, a strategic element, is widely used in various industries in the Russian Federation. However, titanium ore deposits of conventional types with appraised reserves (ilmenite-titanomagnetite ± apatite, titanomagnetite and leucoxene-quartz bedrock deposits, as well as placers with zircon, rutile and ilmenite) have not been mined yet on a commercial scale. Therefore, our aim is to use non-conventional mineral types of ores, e.g. perovskite and titanite ores. The Afrikanda deposit is one of the biggest titanium deposits on the Kola Peninsula. The author discusses the results of the study of a technological titanomagnetite-perovskite sample from the deposit produced by flotation dressing of titanium-bearing concentrate and its reworking to end products by autoclave nitric acid. The results obtained show the complete decomposition of perovskite and titanite upon selective separation of Ti from Ca, Fe, Nb, Ta and REE.

Forecast of ore dressability based on statistical analysis of structures

2023-11-07T12:41:48+03:00

The application of a statistical approach to analysis of ore structures based on calculation of the probabilities of intergranular contacts is discussed. The approach is used to strictly identify structural types and to reveal differences between ores which are similar in composition. Khibiny apatite ores and Kostomuksha iron ores are discussed to find a relationship between the structural type of ore and the degree of recovery of a useful mineral. The approach is proposed for solving mineralogo-technological problems.

Study of the characteristics of the composition of electrical filter ash trapped upon burning coal at Omsk Heat Power Plant-4

2023-11-07T12:42:14+03:00

The composition and microstructure of ash from coal burning were studied using up-to-date analytical methods. Caked aggregates, finely disseminated particles differing in mineral genesis and irregular trace element (Mn, Zr, V, Co, Ce and Y) distribution are noted. This should be taken into account when developing combined technologies for their recovery.