Advanced Methods for Modifying the Properties of Separation Media and Mineral Components for More Efficient Separation of Diamond-Bearing Raw Materials

Modern concrete is more than simply a mixture of cement, water and aggregates; it also contains more and more mineral components, chemical admixtures, so the problem of concrete cracking will be more complicated. This paper mainly discussed the relationship between the character of various raw materials and the crack resistance of concrete. In order to improve the crack-resistant and durability of concrete, the technology for selecting raw materials of crack-resistant concrete is put forward.

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ESTIMATION OF THE EFFICIENCY OF MECHANICAL ACTIVATION OF SILICA-CONTAINING ROCKS

Bulletin of Belgorod State Technological University named after V G Shukhov ◽

10.34031/2071-7318-2021-6-5-19-27 ◽

2021 ◽

Vol 6 (5) ◽

pp. 19-27

Author(s):

A. Shamanina ◽

Arkadiy Ayzenshtadt ◽

V. Kononova ◽

V. Danilov

Keyword(s):

Mechanical Activation ◽

Surface Activity ◽

Raw Materials ◽

Functional Dependence ◽

Construction Materials ◽

Mineralogical Composition ◽

Optimal Time ◽

Energy Potential ◽

Mineral Components ◽

Time Parameters

Rocks of various chemical and mineralogical composition are widely used as raw materials in the construction materials industry. At the same time, preliminary mechanical activation of mineral raw materials to a finely dispersed state contributes to a change in the energy potential of the system and affects the tendency of the surface of a finely dispersed system to transformations. Studies of the physicochemical activity of mechanically activated rocks allow to determine the rational areas of use of mineral components. The paper presents the results of evaluating the efficiency of mechanical activation of silica-containing raw materials by the values of surface activity (ks), defined as the ratio of the value of the free surface energy to the specific mass energy of atomization. Fine powders are obtained by grinding in a planetary ball mill to a different specific surface area of quartz sand (1200 – 3000 m2/kg) and polymineral sand (700 – 1335 m2/kg). The presence of a functional dependence of the surface activity on the time parameters of mechanical activation of the studied rocks is shown. The mechanical activation of the feedstock at the optimal time of its grinding makes it possible to achieve a given value of the surface activity. It is recommended to use the ks parameter as a criterion for assessing the efficiency of the process of mechanical activation of silica-containing rocks

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Development of Fish Products Technology with Using Food Supplements from Fish Remaining Feedstock

KnE Life Sciences ◽

10.18502/kls.v5i1.6055 ◽

2020 ◽

Author(s):

Inna Brazhnaia ◽

Alina Tifanyuk ◽

Olga Kulik ◽

Svetlana Sudak

Keyword(s):

Mathematical Modeling ◽

Raw Materials ◽

Food Additives ◽

Biologically Active ◽

Fish Products ◽

Blue Whiting ◽

Daily Diet ◽

City Population ◽

Mineral Components ◽

Survey Results

The article describes the technology for the production of chopped fish products from blue whiting with the use of food additives from secondary fish raw materials. The sociological survey results and analysis of Murmansk city population nutritional structure are presented and the main factors that affect the choice of fortified foods are identified. The basic formulation of chopped fish products with the introduction of biologically active mineral components is developed and its optimization is carried out by computer simulation. To search close to optimal for a mineral composition that, taking into account the high organoleptic and rheological characteristics, a high orthogonal rototable by mathematical modeling method. The results were processed Datafit 9.0 computer program by generally accepted statistical methods. The experimental results of the chemical composition of chopped fish products and their caloric value are presented. As a result of the studies, a technological scheme and recipe for chopped fish products from Northern Basin underutilized raw materials such as blue whiting with the secondary fish raw materials additives was developed. Experimentally was obtained, that the using a cutlet portion with the 15% addition from its net weight exceeds the daily share of calcium intake, which is unacceptable due to the presence of other food products containing it in the consumers daily diet. The previously developed optimization recipe for chopped blue whiting products with the fish bones flour addition based on organoleptic and structural-mechanical indicators obtained by mathematical modeling methods allowed us to establish the optimal ratio of the introduced components.

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RECOVERY OF PERFORMED COOKING SOLUTIONS AT OXIDATIVE-ORGAN-SOLVENT WARNES IN NEEDRE PLANT RAW MATERIALS

chemistry of plant raw material ◽

10.14258/jcprm.2019034654 ◽

2019 ◽

pp. 277-284

Author(s):

Alesya Valer'yevna Vurasko ◽

Anastasiya Rashitovna Minakova ◽

Elena Igorevna Simonova

Keyword(s):

Acetic Acid ◽

Organic Solvent ◽

Woody Plant ◽

Raw Materials ◽

Azeotropic Distillation ◽

Alkaline Treatment ◽

Constant Amount ◽

Plant Materials ◽

Plant Raw Materials ◽

Mineral Components

The possibility of recovering the spent cooking solution with the replacement of the missing amount of lignifying reagents in the oxidative-organic solvent cooking of non-woody plant raw materials (rice husk) with preliminary alkaline treatment and the production of technical pulp with desired properties is shown. Analysis of scientific and patent information revealed that two methods of regeneration are used for regeneration of spent cooking solutions during oxidation-organosolve cooking: azeotropic distillation and return of part of the spent cooking solution for re-cooking with the completion of the missing amount of reagents. For the oxidation-organosolvent cooking non-wood plant materials the most promising is the second option. To avoid the preservation of mineral components in industrial pulp, non-wood plant materials are subjected to alkaline treatment. It has been established that to obtain technical pulp with recovery of the spent cooking solution, it is required two times less acetic acid and 1.7 times fresh water as compared to oxidation-organic solvent cooking under standard conditions with a constant amount of caustic soda.

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CHANGE OF MICROBIOTAS OF MAIZE-BASED EXTRUDED PRODUCTS WITH VEGETABLE ADDITIVES DURING STORAGE

Food Science and Technology ◽

10.15673/fst.v12i4.1204 ◽

2019 ◽

Vol 12 (4) ◽

Cited By ~ 2

Author(s):

O. Bunyak ◽

S. Sots ◽

A. Egorova ◽

L. Valevskaya ◽

G. Evdokimova

Keyword(s):

Raw Materials ◽

Bacterial Flora ◽

Absolute Number ◽

Prolonged Storage ◽

Cereal Products ◽

Long Term Storage ◽

Mineral Components ◽

Grain Products ◽

Extruded Products ◽

Main Components

Recently, sugar maize has become more and more widely used for the production of new types of food. Its use in the production of cereal products for babies makes it possible to use no sugar in their composition, switch to the production of dietary and prophylactic products, which acquires high importance against the background of “rejuvenation” of diabetes and the manifestation of other nutritional diseases. To enhance the consumer properties of the finished product, to give it the appropriate taste, colour and aroma, as well as to enrich with vitamins, mineral components, flavonoids, phytoncides and glucosides, the following raw materials were selected as the main components for their preparation: maize grains, hullless barley grains in the ratio 1:1, liquorice root (2–4%), carrot roots (2–4%). The article presents the results of microbiota studies of extruded grain products with plant additives during storage. The obtained samples were stored in the laboratory in polypropylene, plastic packaging and cardboard boxes at room temperature of the air +(15–20)°C and air humidity 60–75%. The obtained results allow us to establish that with prolonged storage of commercial samples of extruded grain products with the inclusion of vegetable additives in different temperature and humidity conditions, as the shelf life increases, the number of bacteria decreases. The absolute number of spore-forming bacteria in the samples under study, which were stored in synthetic packaging, remained at the same level, and their relative content in the total bacterial flora increased. On the basis of the research, it has been established that the enrichment of products extruded from sugar maize grain with vegetable additives does not impair their microbiological and physico-chemical characteristics during long-term storage in unregulated conditions. It also allows expanding the range of this type of products.

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Fabricating Plastic Microfluidic Devices With Photodefinable Microvalves for Protein Separations

Microelectromechanical Systems ◽

10.1115/imece2005-79229 ◽

2005 ◽

Author(s):

Carl K. Fredrickson ◽

Champak Das ◽

Fernando T. Tavares ◽

Ryan Ferguson ◽

Zheng Xia ◽

...

Keyword(s):

Protein Separation ◽

Raw Materials ◽

Low Cost ◽

Microfluidic Devices ◽

Hydraulic Press ◽

Protein Separations ◽

In Situ Gel ◽

Separation Media ◽

Bio Compatibility

This paper describes the results of fabricating plastic microfluidic devices and creating a microvalve array for protein separation. Plastic devices are selected due to low cost of raw materials, bio-compatibility, and disposability. Although the methods for fabricating plastic devices have appeared in literature, reports typically indicate one set of conditions that yield functional devices. We report a systematic study of fabrication process parameters including compression rate, molding temperature, and the compression force used by a hydraulic press. Their effects on the device thickness, channel dimension, and pattern transfer fidelity will be discussed. In addition, we investigated creating an array of pseudo-microvalves using photodefinable, in situ gel polymerization. The valves were developed for introducing two types of separation media for performing two-dimensional protein separation in a microfluidic device. We also demonstrated rapid protein separation using the mechanism for the first dimension, isoelectric focusing.

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Study of BOF slags properties with the purpose of their utilization technology perfection

Ferrous Metallurgy Bulletin of Scientific Technical and Economic Information ◽

10.32339/0135-5910-2019-5-623-631 ◽

2019 ◽

Vol 75 (5) ◽

pp. 623-631

Author(s):

N. V. Gmyzina ◽

N. A. Sedinkina ◽

O. E. Gorlova

Keyword(s):

Raw Materials ◽

Fine Grained ◽

Steel Making ◽

Study Results ◽

Mineral Components ◽

Bof Slag ◽

Production Increase ◽

Technological Indices ◽

Work Done ◽

Petrographic Study

Actuality of steel-making slags utilization is stipulated not only by the necessity to improve ecology situation at the sites of slag piles, but also by a possibility to obtain additional raw materials for metallurgical production. Increase of the domestic iron-containing raw materials at Magnitogorsky steel-works can be done by more effective processing of steel-making slags. To improve the technology of BOF slags processing, a work done to study their chemical and mineral composition. It was established, that primary and secondary BOF slags are attributed to basic and ultra-basic, since the SiO2 mass share is less than 25–40%. Petrographic study results and data of IR-spectroscopy showed, that larnite, alite, monticellite and oxide RO-phase (Fe2+, Mn2+, Mg2+)O are main mineral components of the BOF slags. In many cases, the structure of the secondary BOF slags has middle-size grains, and the structure of primary slags is fine-grained. The texture of the secondary and primary slag is more often massive. The BOF slags have globules of iron, the size of which varies from sub-millimeters up to 5 mm. Study of influence of various methods of BOF slag particles destruction on the degree of globules disclosure showed, that application of centrifugal-striking crushing facilities provides more selective globules disclosure comparing with other methods. It was proved, that dry magnetic separation in suspended state, due to its peculiarities, provides higher technological indices comparing with drum separator when separating fine slags even at increase material moisture up to 5%.

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Mineralogical and morphometric aspects of the rock analysis as the basis for choosing a scheme for ore preparation

E3S Web of Conferences ◽

10.1051/e3sconf/202019202023 ◽

2020 ◽

Vol 192 ◽

pp. 02023

Author(s):

Asiya Duryagina ◽

Gerhard Heide ◽

Irina Talovina ◽

Arturo Bravo

Keyword(s):

Raw Materials ◽

Main Task ◽

Fine Grained ◽

Ore Preparation ◽

Ore Minerals ◽

Mineral Components ◽

Standard Quality ◽

Microscopic Studies ◽

Structural And Textural Parameters ◽

Rock Analysis

The complexity of deep processing of fine-grained and refractory mineral raw materials is determined by the difficulty of disclosing aggregates of ore components during disintegration and extracting them into commercial products of standard quality. The main task of the disintegration of such ores is to destroy the object along the phase boundaries without overgrinding while minimizing energy costs. To implement selective disintegration, a precise study of the properties of the mineral components of the ore is necessary. However, there are no systematic data on the effect and relationship of the mineralogical-technological, structural-textural and physical-technical properties of minerals, rocks and ores with the processes of selective disintegration. The article presents the results of computer microtomographic and optical-microscopic studies of the structural and textural characteristics of typical sulfide copper-nickel ores using a SkyScan-1173 microtomograph from Bruker (Belgium), as well as a specialized, accredited as a measuring tool, Thixomet Pro software (Russia). The studies made it possible to identify automatically 19 morphometric parameters of ore grains in three mutually perpendicular sections, the most informative of which were the grain size of individual ore minerals, their perimeter, distance between grains and grain shape (sphericity, edge roughness, and others). The obtained quantitative characteristics of the structural and textural parameters, the analysis of the granulometric composition of the grains of ore minerals make it possible to assess the possibility of using selective grinding at various stages of ore preparation.

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Properties of Recycled-Cement Produced from Waste Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.194-196.1170 ◽

2011 ◽

Vol 194-196 ◽

pp. 1170-1175 ◽

Cited By ~ 1

Author(s):

Hong Mei Ai ◽

Jing Wei ◽

Jun ying Bai ◽

Pu Guang Lu

Keyword(s):

Compressive Strength ◽

Raw Materials ◽

Setting Time ◽

Xrd Analysis ◽

Sem Analysis ◽

Cement Clinker ◽

X Ray Diffraction ◽

Waste Concrete ◽

High Temperature Furnace ◽

Mineral Components

This research aims to find a new way of “turning trash into treasure” for the waste concrete. In the research, waste concrete was first ground, then, after analyzing its mineral composition, combined with some other ingredients according to the modulus of the cement clinker to become raw materials of cement. Mixed raw materials were made to be a thin cake, and then sent into high temperature furnace (HTF) to sinter for a certain period of time. Properties of cement, such as the compressive strength, required water of standard consistence and setting time were tested. The composition and microstructure of clinker were analyzed with X-ray diffraction (XRD) analysis and scanning electron microscope (SEM) analysis. The experimental results showed that the main mineral components of clinker are C3S, β-C2S, CA2, CA, C3A, C4AF, the compressive strength of the recycled-cement is approximately equal to P.O32.5, there exists an optimum sintering temperature for the recycled-cement clinker with a given mix ratio of raw materials and content of seed crystal added,, and this temperature is usually much lower than the temperature adopted wildly in the cement plants.

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Complex Organomineral Additives with Hardening Accelerator

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.284.929 ◽

2018 ◽

Vol 284 ◽

pp. 929-935 ◽

Cited By ~ 1

Author(s):

O.V. Tarakanov ◽

E.A. Belyakova ◽

V.S. Yurova

Keyword(s):

Sodium Sulfate ◽

Raw Materials ◽

High Strength ◽

Strength Parameters ◽

Active Matrix ◽

Hardening Process ◽

Complex Additive ◽

Effect Of Additives ◽

Concrete Mix ◽

Mineral Components

A complex organomineral additive based on local raw materials (diatomite), superplasticizer and accelerator for sodium sulfate hardening has been developed. The possibility of using activated diatomite in the composition of concrete instead of microsilica with activation of the sodium sulfate hardening process is shown. The results of the effect of additives on the composition of the hydrated phases of cement systems, the processes of structure formation and hardening of cement materials, the effect of a complex additive on the strength of concrete are given. The achievement of high strength parameters of concretes, including those with a lower cement consumption, is ensured by introducing into the concrete mix fine-dispersed mineral components that promote the creation of a rheologically active matrix and increase the effectiveness of super-and hyperplasticizers.

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