scholarly journals Production cycle characteristics of high-purity quartz opencasting

2020 ◽  
pp. 14-25
Author(s):  
Kantemirov Valerii ◽  
Titov Roman ◽  
Iakovlev Andrei ◽  
Kozlova Maria
Keyword(s):  
High Purity ◽  
Raw Materials ◽  
Impurity Content ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Production Cycle ◽  
Mining Operations ◽  
Crystal Silicon ◽  
Quartz Veins ◽  
Technical Solutions

Introduction. Currently, the main raw material for obtaining transparent quartz glass, an indispensable component in the production of single-crystal silicon, is high-purity quartz concentrate. The concentrate is a product of grinding natural “pure” quartz, which has undergone a cycle of mechanical and deep chemical refining, with a particle size of 0.1–0.3 mm and a total impurity content of no more than 20–30 ppm. However, in nature, deposits of pure quartz are quite rare, and it means that each explored site is of particular importance and is to be developed with minimal losses of quartz raw materials. Research aim is to develop technical solutions for processing small veins of high-purity granulated quartz. Methodology. Physical and mechanical properties and mining conditions for the individual quartz veins of the Kyshtym deposit are analyzed. Production cycle solutions for opencasting quartz veins have been developed allowing to reduce the degree of quartz over-grinding. Results. Granulated quartz, due to its structure, has the property of “avalanche” destruction into small grains. This significantly reduces the yield of the conditioned fraction –400 +20 mm, and regarding small reserves of quartz in veins, on average 0.1–2 thousand tons, it raises the question as to whether the development is feasible and effective. To increase the yield of conditioned fractions of quartz raw materials, a non-explosive technology of quartz breaking is proposed with a hydraulic hammer on a hydraulic excavator in combination with quartz vein preliminary exposure from the host rocks using a special technology for blasting rocks in the contact zone of “quartz-rock”. Conclusions. The proposed technical solutions will allow to involve small quartz veins of high purity granulated quartz into the development and provide high productivity and efficiency of mining operations without significant losses of scarce raw materials.

Research on Simulation Test of Coal Similar Material

2013 ◽  
Vol 850-851 ◽  
pp. 847-850 ◽  
Author(s):  
Lin Chao Dai
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Similarity Theory ◽  
Design Method ◽  
Uniform Design ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Similar Material ◽  
Cement Ratio ◽  
Water Cement Ratio

In order to study the coal and gas outburst similar simulation experiment, coal similar material was made up based on the similarity theory. Based on the previous similar material study, the cement, sand, water, activated carbon and coal powder was selected as the raw material of similar material. Meanwhile similar material matching program with 5 factors and 6 levels was designed by using Uniform Design Method. And the physical and mechanical properties of the similar material compressive strength was measured under different proportions circumstances. The relationship between similar material and the raw materials was analyzed. The results show that choosing different materials can compound different similar materials with different requirements. And the water-cement ratio plays a decisive influence on the compressive strength of similar material. The compressive strength of similar material decreases linearly when the water-cement ratio increases.

Ceramic Composition Material with Mullite Crystals Obtained from the Clayy Raw Material of Yakutia

2020 ◽  
Vol 992 ◽  
pp. 253-258
Author(s):  
M.P. Lebedev ◽  
V.N. Tagrov ◽  
E.S. Lukin
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Practical Interest ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Strength Properties ◽  
Raw Material ◽  
Composition Material ◽  
Material Base ◽  
Wide Range

The article deals with the manufacture of modern structural ceramic materials from clay and loam deposits of the Republic of Sakha (Yakutia). The importance and relevance of the development of the production of building materials from local raw materials is emphasized, since this will certainly affect the effectiveness of the construction complex as a whole. The successful development of the construction complex is capable of not only stimulating growth in all sectors of the economy, but also contributes to solving the most pressing social problems. Today, Yakutia has huge reserves of mineral raw materials for the production of a wide range of building materials and products. Of practical interest are wall materials made from clay soils. Given the features of the region’s raw material base, this work focuses on additional processing of traditional material. Controlling the complex physicochemical and structural-mechanical transformations that occur during heat treatment, a methodology has been developed for creating a composite material that will allow competitive innovative materials with enhanced strength properties to be produced with a reinforcing element with a glassy phase matrix of mullite crystals. The fabricated samples have a wide range of physical and mechanical properties and allow using it as a high-quality structural building ceramics, as well as industrial floor technical tile.

scholarly journals Analysis Physical and Mechanical Of Particle Boards Raw Materials Nipah Fruit Fiber

Teknomekanik ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 14-19
Author(s):  
M Saddikin ◽  
Hendri Nurdin ◽  
Primawati Primawati
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Average Density ◽  
Raw Material ◽  
Average Moisture Content ◽  
Particle Board ◽  
Wood Particles ◽  
Tapioca Flour

The raw materials of the timber industry, especially furniture, are increasingly difficult to obtain in the quantity and quality needed. The development efforts carried out were utilizing Nipah coir waste as a raw material for making particle boards. Particle boards are panel boards made of wood particles or materials containing lignocellulose. Nipah plants contain 27.3% lignin and 36.5% cellulose which has the potential to be used as raw material for particleboard production. This study aims to reveal the physical and mechanical properties of particleboards made from Nipah fruit fibre with adhesive using tapioca flour. The making of particle board is done with a ratio of 90%: 10%, 80%: 20%, 70%: 30%, 60%: 40%, by giving a pressure of 100 kg / cm2. Particle testing is carried out according to the JIS A 5908 standard (2003). From this study, the optimum results were obtained in variations of 60%:40%. The particle physical properties which have an average density value of 1.15 gr / cm3 and an average moisture content of 5.8%. While the mechanical properties obtained by the value of Modulus of Elasticity an average of 21,188.93 kg / cm2. This shows the particle board variations of 60%: 40% produced to meet the JIS A 5908 (2003) standard. Based on the analysis of the quality variations 60%: 40% of particle boards can be recommended as raw materials for interior furniture.

scholarly journals PURIFICATION OF LITHIUM CARBONATE FROM SPODUMENE RAW MATERIAL FOR APPLICATION IN ENERGY STORAGE DEVICES

2021 ◽  
Vol 1 (1) ◽  
pp. 15-16
Author(s):  
Gauhar Bishimbaeva ◽  
Asem Zhanabaeva ◽  
Dinara Zhumabaeva ◽  
Araylym Nalibaeva ◽  
Erlan Abdikalykov
Keyword(s):  
Energy Storage ◽  
High Purity ◽  
Raw Materials ◽  
Lithium Carbonate ◽  
Raw Material ◽  
Efficient Technology ◽  
Energy Storage Devices ◽  
Storage Devices

An efficient technology has been developed for obtaining high-purity lithium car bonate (99.95%) from Kazakhstani spodumene raw materials

scholarly journals Sustainable Silicon and High Purity Alumina Production from Secondary Silicon and Aluminium Raw Materials through the Innovative SisAl Technology

2021 ◽  
Vol 5 (1) ◽  
pp. 85
Author(s):  
Aikaterini Toli ◽  
Georgia Maria Tsaousi ◽  
Efthymios Balomenos ◽  
Dimitrios Panias ◽  
Matthias Heuer ◽  
...  
Keyword(s):  
High Purity ◽  
Raw Materials ◽  
Lithium Ion ◽  
Raw Material ◽  
Added Value ◽  
Aluminium Chloride ◽  
Pure Aluminium ◽  
Alumina Production ◽  
Chloride Hexahydrate ◽  
Total Extraction

Calcium aluminate slag produced by the aluminothermic reduction of silica is tested as a candidate raw material for the hydrometallurgical production of pure aluminium chloride hexahydrate (ACH) through leaching with hydrochloric acid. The crystallization of ACH follows by sparging the pregnant liquor with hydrochloric gas. Almost total extraction of Al is achieved with the use of azeotropic HCl acid solution (5.9 M) at 80 °C and 1 h retention time. A pregnant liquor with approximately 20 wt% AlCl3 is produced as a base for ACH crystallization by sparging it with gaseous HCl. The ACH produced is re-dissolved and crystallized three to four times until high purity is achieved. High purity ACH acts as a precursor for producing High Purity Alumina (HPA), a high added value material used in LEDs and lithium-ion batteries and other niche applications.

scholarly journals Production of cast iron during the melting of mineral raw materials in coke cupolas

2021 ◽  
pp. 43-48
Author(s):  
S. L. Rovin ◽  
L. E. Rovin ◽  
V. A. Jaranov
Keyword(s):  
Cast Iron ◽  
Liquid Metal ◽  
Raw Materials ◽  
Mineral Wool ◽  
Raw Material ◽  
Mineral Raw Materials ◽  
Cast Alloys ◽  
A Charge ◽  
Technical Solutions

In the production of mineral raw materials in cupolas, as a by-product and harmful product, a significant amount of cast iron (up to 3 % of the raw material) is formed and, as a rule, thrown into the dumps. The article presents technical solutions that ensure the separation of mineral melt and cast iron. In addition, the article describes the results of optimizing the design of ladders used for draining liquid metal from the mineral wool cupola and transporting it. The resulting cast iron ingots can then be used as a charge in the smelting of branded cast alloys.

scholarly journals Research of functional and technological properties of minced meat products with using fish raw materials

2018 ◽  
Vol 20 (90) ◽  
pp. 22-26
Author(s):  
Y. Matsuk ◽  
I. Marchenko ◽  
V. Pasichnyi
Keyword(s):  
Raw Materials ◽  
Control Sample ◽  
Meat Products ◽  
Absorption Capacity ◽  
Raw Material ◽  
Partial Replacement ◽  
Production Cycle ◽  
Technological Properties ◽  
Technological Parameters ◽  
Minced Meat

The article is devoted to the improvement of the recipes of minced meat products with using fish raw materials and the study of organoleptic and functional and technological properties of developed minced meat systems and finished products. The research has been carried out on the rational combining of meat and fish raw materials and the expansion of assortment of minced semi-finished products. The formulations of minced meat systems for the production of meat semi-finished with a partial replacement of the main raw material to fish raw materials have been developed. The organoleptic and functional and technological parameters of minced meat systems and finished products are investigated. According to the results of the organoleptic evaluation, it was found that partial replacement of meat raw material with minced fish does not worsen the sensory characteristics of minced meat products. It is established that in comparison with the control sample there is an improvement of functional and technological indicators. In particular, the moisture content increased by an average of 6.1%, moisture absorption capacity – 5.91%, energy absorption capacity – 2.49%, fat-retaining ability – 2.52%. The obtained results confirmed the expediency of using minced meat with pollack in the technology of minced meat semi-finished products with due observance of the parameters of production cycle of heat treatment of products. It has been theoretically substantiated and experimentally confirmed the technology of meat products using minced meat and developed recipes. It has been established that with careful selection of components that are part of minced meat semi-finished products with the addition of fish raw materials can increase the organoleptic and functional and technological parameters of finished products. The obtained data suggest that the improved recipes of minced meat semi-finished products can be recommended for production by enterprises of the meat industry and restaurants

scholarly journals STUDY ON THE GRINDING TIME DURATION IMPACT ON THE PROPERTIES OF PAPER FROM ALTERNATIVE RAW MATERIALS

2020 ◽  
Vol 2020 (3) ◽  
pp. 24-31
Author(s):  
Z Galimova ◽  
◽  
H Babakhanova ◽  
M Abdunazarov ◽  
I Ismoilov ◽  
...  
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Milling Process ◽  
Raw Material ◽  
Time Duration ◽  
Paper Production ◽  
Fiber Materials ◽  
The Impact

Both raw and recycled fiber materials are used for paper production. The increase in percentage use of the latter is due to their paper-forming properties, availability and low cost. The article explores the possibility of using pulp from the inner layer of mulberry twig bark. Mulberry twigs, after removing leaves, which are the main raw material in silk production, have no practical industrial application. Recycling waste - mulberry branches - for the production of pulp is therefore relevant as it is aimed at solving raw material and environmental problems. The purpose of this work is to use local raw materials for paper production, study the impact of processing method of the grinding process on paper forming properties. During grinding the mechanical processes of changes of fibers determine mainly structure of a paper sheet, and colloidal-physical processes - bind and ability of fibers to form strong, homogenous and smooth structure of paper. The structure of the sheet of paper facilitates excessive or "selective" ink absorption into the pores of the paper and thus predetermines the quality of reproduction during the printing process. Methods for determining the physical and mechanical properties of papers were used in this work, and changes in the surface structure of samples cast at various technological modes of the milling process were studied. The results of the study revealed that the addition of cellulose mass from the inner layer of mulberry twig bark helps to obtain a strong paper. The optical properties of the paper, which contains cotton and cellulose from the inner layer of mulberry branch bark, are explained by the whiteness of the added fibers themselves. The strength properties of the paper at a weight grinding degree of 300 CWR are explained by the bond between the split and strongly interwoven fibers of the cellulose fibers. It has been established that the addition of more than 30% cellulose from the inner layer of the mulberry branch bark to the paper pulp mass is undesirable, as this adversely affects the whiteness of the paper

Production of Cement Blocks and New Ceramic Materials with High Content of Glass Waste

2015 ◽  
Vol 663 ◽  
pp. 34-41 ◽  
Author(s):  
Fernanda Andreola ◽  
Isabella Lancellotti ◽  
Rosa Taurino ◽  
Cristina Leonelli ◽  
Luisa Barbieri
Keyword(s):  
Mechanical Properties ◽  
Environmental Impact ◽  
Economic Burden ◽  
Raw Materials ◽  
Glass Melting ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Raw Material ◽  
Added Value ◽  
Glass Waste

Virgin raw materials can be partially replaced by glass waste in order to reduce the environmental impact being its recycling a significant problem for municipalities worldwide. In Italy in 2013, approximately 1,600,000 tons of container glass have been collected but it was not possible to recycle all of them in the glass melting process.This work is focused on the valorization of glass waste as raw material in new cement and ceramic products, to convert it from an environmental and economic burden to a profitable, added-value resource in the formulation of new mixes. Several parameters, such as grinding, forming, firing, etc. have been studied.It has been optimized the grinding and the reclaiming step of waste to obtain an alternative raw material for hot and cold consolidation processes. Chemical, physical and mechanical properties of products were carried out. The results show new real possibilities to use high amounts of glass waste as an alternative raw material in products consolidated either by hot or cold techniques, reducing the management problems of the glass waste.

scholarly journals Manufacture of Sustainable Clay Bricks Using Waste from Secondary Aluminum Recycling as Raw Material

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2439 ◽  
Author(s):  
Eduardo Bonet-Martínez ◽  
Luis Pérez-Villarejo ◽  
Dolores Eliche-Quesada ◽  
Eulogio Castro
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Linear Shrinkage ◽  
Raw Material ◽  
Partial Substitution ◽  
Secondary Aluminum ◽  
Recycling Industry ◽  
Clay Bricks ◽  
Aluminum Recycling

The aluminum recycling industry produces aluminum filter dust (AFD), a waste byproduct of the aluminum recycling process composed mainly of aluminum oxide in a percentage between 60–70%, 8% calcium oxide, almost 15% sodium chloride, and between 5–10% potassium chloride. Due to its aluminum content, this waste can be used as a raw material in the manufacture of ceramic bricks, at the same time reducing the environmental impact produced in landfill. In this work, the partial substitution of a clay mixture (40% black, 30% red, and 30% yellow clay) by different proportions of AFD in the range 0–25 wt % for the production of fired clay brick was studied. The raw materials, clays, and waste were characterized by XRF and XRD. The brick specimens were fired at 950 °C and their physical and mechanical properties, such as water absorption, water suction, loss of ignition, linear shrinkage, bulk density, and compressive strength, were analyzed. The more relevant results were obtained with the addition of up to 20 wt % AFD, obtaining bricks with physical properties comparable to pure clay-based bricks used as a reference and better compressive strength and thermal conductivity due to the balance between the melting and pore-forming effects of the waste. These sustainable bricks also comply with the regulations of heavy metals leached to the environment, as indicated by the leaching test.

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