Geometallurgical Concepts Used in Industrial Mineral Production

2019 ◽  
Vol 114 (8) ◽  
pp. 1543-1554 ◽  
Author(s):  
Steinar L. Ellefmo ◽  
Kurt Aasly ◽  
Aleksandra Lang ◽  
Veena S. Vezhapparambu ◽  
Camilo A.M. Silva
Keyword(s):  
Construction Material ◽  
Mining Industry ◽  
Raw Material ◽  
Processing Route ◽  
Specific Reference ◽  
Industrial Minerals ◽  
Measurement While Drilling ◽  
Industrial Mineral ◽  
Mineral Production ◽  
Block Models

Abstract Geometallurgy has developed since the 1970s, primarily on metallic ore operations. In parallel, industrial mineral operations have been optimized through detailed deposit knowledge and market development, without making specific reference to geometallurgical concepts. The Norwegian mining industry is dominated by industrial mineral and construction material operations, and, in this paper, key differences between the industrial mineral and the metallic ore sectors are investigated, along with their influence on the development and the use of economic block models and optimization methodologies. Further, the key levers and factors (mining method selection, processing route, scale, sequence, and cutoff policy) for value creation in industrial mineral operations are discussed, along with how and to what extent geometallurgy has been used. It is concluded that the five key levers cannot be used in industrial minerals operations as effectively as they are used in metallic ore operations. In industrial minerals, in situ strength variations are an important parameter in estimating key performance indicators such as recovery and product quality. When modeling the spatial variation in rock strength potential, additivity issues must be resolved by investigating the process the raw material is exposed to. The Norwegian industrial mineral sector has been using elements of geometallurgy but is facing unresolved issues related to strength variations and the use of measurement while drilling data.

scholarly journals Crushed Bricks: Demolition Waste as a Sustainable Raw Material for Geopolymers

2021 ◽  
Vol 13 (14) ◽  
pp. 7572
Author(s):  
Gigliola D’Angelo ◽  
Marina Fumo ◽  
Mercedes del Rio Merino ◽  
Ilaria Capasso ◽  
Assunta Campanile ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Building Materials ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Construction Material ◽  
Raw Material ◽  
The European Union ◽  
Total Energy Consumption ◽  
Demolition Waste ◽  
Crushed Brick

Demolition activity plays an important role in the total energy consumption of the construction industry in the European Union. The indiscriminate use of non-renewable raw materials, energy consumption, and unsustainable design has led to a redefinition of the criteria to ensure environmental protection. This article introduces an experimental plan that determines the viability of a new type of construction material, obtained from crushed brick waste, to be introduced into the construction market. The potential of crushed brick waste as a raw material in the production of building precast products, obtained by curing a geopolymeric blend at 60 °C for 3 days, has been exploited. Geopolymers represent an important alternative in reducing emissions and energy consumption, whilst, at the same time, achieving a considerable mechanical performance. The results obtained from this study show that the geopolymers produced from crushed brick were characterized by good properties in terms of open porosity, water absorption, mechanical strength, and surface resistance values when compared to building materials produced using traditional technologies.

Studying the Effect of some Factors on the Stress-Strain Behavior of the Rostov Region Limestones in the Course of their Production and Use

2021 ◽  
Vol 1022 ◽  
pp. 80-86
Author(s):  
Mikhail G. Kholodnyak ◽  
Sergey A. Stelmakh ◽  
Evgeniy M. Shcherban ◽  
Mukhuma P. Nazhuev
Keyword(s):  
Construction Material ◽  
Experimental Studies ◽  
Raw Material ◽  
Material Base ◽  
Strain Behavior ◽  
Current State ◽  
Rostov Region ◽  
Literary Sources ◽  
Crushed Granite ◽  
Strain Stress

The paper considers the current state of the mineral raw material base and the construction material market of the Rostov Region. The effect of various factors on the strain-stress behavior of local limestones has been investigated. The scientific and technical literary sources devoted to the processes of rock failure under various loads have been analyzed. The experimental studies have shown that the tested samples of limestone with a high content of cuboidal grains have characteristics comparable to those of the crushed granite stone. It has been concluded that the use of the Rostov Region limestones in the construction industry is competitive and feasible, provided the proper implementation of the engineering measures proposed in their production.

scholarly journals Industrial minerals of the Fennoscandian Shield and their contribution to progress in the mineral-raw materials balance of global economy

2019 ◽  
Author(s):  
Владимир Щипцов
Keyword(s):  
Global Economy ◽  
Raw Materials ◽  
Fennoscandian Shield ◽  
Mineral Deposits ◽  
Market Demand ◽  
Industrial Minerals ◽  
Geological Evolution ◽  
Industrial Mineral ◽  
Environmental Requirements

The Fennoscandian Shield is a megastructure, which has actively evolved since the early stages of earth crust formation (> 3.5 Ga) and a sequence of geological regimes during subsequent geological evolution paralleled by the formation of various types of industrial mineral deposits. The paper shows the important role of the shield’s industrial minerals in the exploitation of global useful mineral deposits played for decades. The industrial mineral potential and its dependence on socio-economic conditions, environmental requirements and market demand are described.

scholarly journals COMPARISON OF PARTICLE SHAPES OF CONVENTIONALLY GROUND BARITE, CALCITE AND TALC MINERALS BY DYNAMIC IMAGING TECHNIQUE: A REVIEW

2020 ◽  
Vol 5 ◽  
pp. 80-90
Author(s):  
Ugur Ulusoy
Keyword(s):  
Critical Issue ◽  
Dynamic Imaging ◽  
Industrial Minerals ◽  
Grinding Mills ◽  
Conventional Grinding ◽  
Industrial Mineral ◽  
Dynamic Image Analysis ◽  
And Control ◽  
Particle Shapes ◽  
Good Agreement

Shape of particles made by grinding is one of the important measures for determining the utilizations of industrial minerals namely barite, calcite, and talc particles, particularly at production (like coating pigments, paints, rubber and paper) and processing stages (beneficiation by flotation). Therefore, measurement of particle characteristics is a critical issue in the development and control of industrial mineral products in most of the industries for some demanding applications. Ball and rod mills are commonly used as conventional grinding mills to produce a controlled grind size for the flotation circuit in the beneficiation of industrial minerals. Dynamic Image Analysis (DIA) offers reproducible results of a huge number of particles for some industrial minerals namely, barite [1], calcite [2] and talc [3] particles, whose shapes are crucial for some industries utilized as fillers. Thus, this review is about the comparison of shape values in terms of circularity (C) and bounding rectangle aspect ratio (BRAR) determined by the real time DIA. It was found that the shape results of the previous studies for the same samples by SEM measurement [4] were in good agreement with DIA results. It was concluded that the more rounded particles were encountered in the rod milled products for calcite and barite minerals. On the other hand, the more elongated particles were found in the ball milled products for talc mineral. It was attributed to the material type since the same mills were used for all tests. Hence, DIA can be used as a useful tool, which is easy, fast and highly accurate to control the particle shape distributions whether the required powder is fit for use

scholarly journals LOW- GRADE STRUCTURES OF NOBLE AND NON- FERROUS METALS AND METHODS OF THEIR SELECTIVE SEPARATION

2021 ◽  
Vol 13 (2) ◽  
pp. 161-169
Author(s):  
Tatyana ALEXANDROVA ◽  
◽  
Anastasia AFANASOVA ◽  
Nadezhda NIKOLAEVA ◽  
◽  
...  
Keyword(s):  
Development Strategy ◽  
Raw Materials ◽  
Close Association ◽  
Mining Industry ◽  
Raw Material ◽  
Free Form ◽  
Mineral Matter ◽  
Low Grade ◽  
Rare Metals ◽  
Flotation Process

There is a worldwide trend of increasing the share of extraction and processing of low-grade minerals, but their extraction and processing volumes are still low. There are several reasons for this: high mining and transportation costs, imperfect techniques and technological difficulties in enrichment and processing of refractory and low-quality minerals. Due to the depletion of reserves of easily beneficiated raw materials and to compensate for the growing shortage of high-quality minerals, the Russian mining industry development strategy provides for the involvement of new and unconventional types of deposits into production. Examples of such deposits are deposits of carbonaceous raw materials (black shale, refractory sulphide carbon-bearing ores, impactites, etc.) containing carbon of varying degrees of metamorphism. On the basis of the most modern mineralogical, physical, nuclear and chemical methods of research of composition, structure and properties of the carbonaceous raw materials at the micro- and nanolevel, the composition of the productive mineral matter, physical, chemical and thermodynamic laws of separation of valuable mineral components and the basic technological processes to obtain the finished product for valorization of the unconventional carbonaceous mineral raw materials were determined with maximum reliability. One of the possible reasons of difficulty of beneficiation of carbonaceous raw materials is the fine phenocrysts in graphite which can be solved by using the flotation process. Contrast of surface properties of minerals with similar technological properties can be increased by application of different energy effects (MEMI, MIO, microwave, electrochemical treatment etc.) at successive stages of raw material transformation, regulation of pulp conditioning conditions (duration and intensity of agitation, heat treatment of pulp) as well as by development and application of selective reagent regimes. The special feature of flotation as a method of extraction of noble and rare metals is the ability to extract valuable metals not only in their native free form, but also in close association with sulphides and carbon. Flotation with the use of intensifying influences made it possible to transfereven low-sized structures of noble and rare metals, which are not extracted by conventional methods of cyanidation, gravitation enrichment and amalgamation, into the concentrate. One of the ways to increase the efficiency of the flotation process is preliminary modification of the additive which is introduced in addition to the main reagents of the sinter - “carrier material”.

scholarly journals US INVESTMENTS IN PRIORITY SECTORS OF THE ECONOMY OF KAZAKHSTAN

THE BULLETIN ◽  
2020 ◽  
Vol 5 (387) ◽  
pp. 199-207
Author(s):  
G. Т. Shakulikova ◽  
◽  
Zh. K. Yerzhanova ◽  
Zh. Zh. Gabbassova ◽  
R. A. Karabassov ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Stock Market ◽  
Foreign Investment ◽  
Mining Industry ◽  
Raw Material ◽  
Key Factors ◽  
Investment Funds ◽  
The Public ◽  
Advantages And Disadvantages ◽  
Returns On Investment

In the conditions of self-isolation, a small and medium business suffered as a result of a pandemic, however, large business remained afloat due to large “long money”. Large business in Kazakhstan is mainly a raw material business, i.e., the mining industry, as a priority, has not suspended its activities. The tasks in the field of attracting investment remained the same. For Kazakhstan, in the direction of attracting foreign investment, firstly, it is worth identifying competitive sectors of the economy. Secondly, clearly understand the key factors in the development of these industries. Thirdly, to conduct a comparative analysis and assess the advantages and disadvantages in relation to other countries, which will be the main competitors in this industry. Fourth, identify potential investors. Fifth, optimize the activities of the coordinating agency or body that is responsible for investments in Kazakhstan. For US investors, the stock market in Kazakhstan is very small. It presents mainly companies in the mining and financial sectors of the economy, as well as the public sector. The limited financing opportunities in the stock market do not allow providing higher returns on investment funds, and this in turn negatively affects the influx of potential investors and investors.

scholarly journals Promotion of Circular Economy: Steelwork Dusts as Secondary Raw Material in Conventional Mortars

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1313
Author(s):  
Angélica Lozano-Lunar ◽  
Auxi Barbudo ◽  
José María Fernández ◽  
José Ramón Jiménez
Keyword(s):  
Construction Industry ◽  
Circular Economy ◽  
Construction Material ◽  
Previous Treatment ◽  
Point Of View ◽  
Raw Material ◽  
The European Union ◽  
Use Of Resources ◽  
Leaching Behaviour ◽  
Secondary Raw Material

Among the actions proposed by the European Union for the implementation of Circular Economy is the use of waste as a secondary raw material (SRM). During the fusion of the scrap, a steel dust is generated, named Electric Arc Furnace Dust (EAFD). The EAFD is composed mainly of potentially leachable heavy metals, so is classified as “hazardous” waste. Around the world, approximately 70% of this waste is deposited in landfills, with a previous treatment through cement-based materials to prevent the metals’ mobility. However, this action is not in accordance with the Circular Economy concept due to the greater use of resources and the loss of deposited metals. The present investigation analyses the use of EAFD as SRM in conventional mortar production for its use as a construction material. Different substitution percentages (25%, 50% and 100%) were used replacing siliceous filler by EAFD. The investigation analysed the behaviour of conventional mortars by tests of workability, compressive strength, water absorption by capillarity and leaching behaviour in granular and monolithic state. The results obtained indicate a slight improvement in mechanical behaviour with the incorporation of EAFD, the reason why its use as SRM in conventional mortars would benefit the construction industry and would encourage the Circular Economy. From an environmental point of view, the mechanisms of Pb fixation should be improved in granular state.

scholarly journals The Barriers to Proletarianization: Bolivian Mine Labour, 1826–1918

1996 ◽  
Vol 41 (S4) ◽  
pp. 27-51 ◽  
Author(s):  
Erick D. Langer
Keyword(s):  
Latin American ◽  
North Atlantic ◽  
Mining Industry ◽  
Raw Material ◽  
Export Orientation ◽  
The North ◽  
The World ◽  
Primary Goods ◽  
The North Atlantic ◽  
The Rich

Labour history in Latin America has, to a great degree, followed the models set by the rich historiography in Europe and North America. Other than a justifiable concern with the peculiarities in production for export of primary goods, much of the Latin American historiography suggests that the process of labour formation was rather similar to that of the North Atlantic economies, only lagging behind, as did industrialization in this region of the world. However, this was not the case. The export orientation of the mining industry and its peripheral location in the world economy introduced certain modifications not found in the North Atlantic economies. The vagaries of the mining industry, exacerbated by the severe swings in raw material prices, created conditions which hindered proletarianization and modified the consciousness of the mine workers.

CURRENT STA TE OF THE RESOURCE BASE OF COAL MINING INDUSTRY IN KUZBASS

2019 ◽  
Vol 4 (1) ◽  
pp. 177-186
Author(s):  
S.V. Shaklein ◽  
◽  
M.V. Pisarenko ◽  
Keyword(s):  
Coal Mining ◽  
Mining Industry ◽  
Coal Industry ◽  
Raw Material ◽  
Open Pit ◽  
Open Pit Mining ◽  
Material Base ◽  
Resource Base ◽  
Production Technologies ◽  
Underground Method

Analysis of the grade composition of the mineral resource base of the distributed and undistributed subsoil Fund as of 01.01.2018 showed a decrease in reserves of coal intended for open pit mining. In the future, the production of a number of technological grades of coal (gas fat (GZh), fat (Zh), coking fat (KZh), coking (K), coking caking low-metamorphized (KCN), coking caking (KC), lean caking (OC), low caking (CC) is possible only by underground method. The expansion of the raw material base of the Kuzbass coal industry and the support of coal production volumes, primarily by the technological of grades coking fat (KZh), coking (K), coking caking (KC), lean caking (OC), low caking (CC) involves exploration, the use of unconventional production technologies and tax preferences for coal mining enterprise

scholarly journals Development of kaolin production, reserves and processing in the Czech Republic in 1999–2015

2017 ◽  
Vol 33 (3) ◽  
pp. 121-142 ◽  
Author(s):  
Jaromír Starý ◽  
František Pticen ◽  
Jakub Jirásek ◽  
Martin Sivek
Keyword(s):  
Czech Republic ◽  
Mining Industry ◽  
Silica Sand ◽  
Industrial Minerals ◽  
Growth Trend ◽  
The Czech Republic ◽  
Mine Production ◽  
Export Restrictions ◽  
The Government ◽  
The Stability

Abstract This paper aims to characterize and interpret the trends in reserves, resources, and in the mine production of crude kaolin and output of beneficiated kaolin between 1999 and 2015 in the Czech Republic. With nearly 1.2 billion tonnes of total resources, kaolin belongs to the key industrial minerals of the Czech Republic. With an annual output of about 3 to 4 million tonnes of crude kaolin and of around 0.6 million tonnes of beneficiated kaolin, the Czech Republic ranks among the top European and world kaolin producers. Mine production of crude kaolin has been relatively stable since 1997, while the output of beneficiated kaolin has been increasing gradually during the same period. The increased production and yield of beneficiated kaolin resulted from the use of progressive methods in kaolin processing, primarily high-intensity electromagnetic separation. The positive growth trend was not a reflection of the stability of the extractive sector and domestic industry, but it was the result of a pro-export orientation. The amount and share of exports are continuously increasing and constitute 80% of the entire kaolin production sector at the present time. The only exception occurred in 2005-2008, when exports declined by one-half as a result of the government´s export restrictions. The results of analyses were not optimistic for the Czech economy and indicated a sharp downturn in the domestic mining industry. Moreover, a similar situation exists in the case of other essential industrial minerals such as feldspar, clays, and silica sand.

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