scholarly journals Production of molded refractory products based on zeolite-containing rocks and high-modulus polysilicates

Author(s):  
E. Fetyuhina ◽  
N. Sharova ◽  
P. Paraguzov

The development of a new method for producing molded non-fired refractory materials is necessary to replace imported products with Russian-made products based on locally available raw materials, as well as increasing requirements to reduce energy costs and increase environment-friendly manufacturing. Samples of molded refractory products are obtained and tested on the basis of zeolite-containing rocks and high-modulus polysilicates. Zeolite-containing rocks are a common mineral, so the technology can be easily scaled, including in the European part of Russia, while traditional refractory raw materials are concentrated on the periphery of the Russian Federation. The strength and fire-resistant properties of these samples are due to the presence of phosphorus-silicate bonds. The type of binding is a chemical reaction based on the interaction of phosphates, alkaline silicates and other salts. Refractory molded products obtained by the non-burning method will be in high demand in the metallurgical, energy and chemical industries, and the use of available natural raw materials for their production is a guarantee of economic benefits for their manufacture and use. The technical characteristics of the obtained samples are determined: strength of refractory products, bulk mass, fire resistance, residual strength of samples after their heating to the application temperature, water absorption of samples, limits of permissible deviations of sizes, indicators of the appearance of products.

2007 ◽  
Vol 35 (3) ◽  
pp. 457-475 ◽  
Author(s):  
Aurora Álvarez Veinguer

The Republic of Tatarstan is located between Europe and Asia. It is important to emphasize geographical location, which is a key element in the processes of identities formation and transformation. Tatarstan is located in the core of the Russian Federation, situated in the European part of Russia and 800 kilometres from Moscow, at the confluence of the Volga and the Kama Rivers. The capital of Tatarstan is Kazan. The economic potential of the republic is based mainly on raw materials (including oil and gas), industry and agriculture. According to the constitution of the republic (approved on 6 November 1992) Tatarstan (previously known as Tataria) is defined as a multiethnic republic, with two official languages, Russian and Tatar. The largest ethnic groups are Tatars and Russians; as a consequence it makes sense to talk in terms of a bicultural society with two main confessional groups, namely Muslim and Orthodox Christians.


Author(s):  
Chernichkina A.D.

A large number of biologically active substances, organic acids, tannins, and pectin substances were detected during the study of fruits, leaves, and pulp of the fruits of mountain Ash. The content of these substances in leaves and pulp will significantly expand the arsenal of medicinal plant raw materials used. Given the wide distribution of mountain Ash in the territory of the Russian Federation, harvesting leaves from the same plants after harvesting the fruit and using pulp will make it possible to obtain new phytopreparations.


2020 ◽  
pp. 63-72
Author(s):  
Yu. Olefir ◽  
E. Sakanyan ◽  
I. Osipova ◽  
V. Dobrynin ◽  
M. Smirnova ◽  
...  

The entry of a wide range of biotechnological products into the pharmaceutical market calls for rein-forcement of the quality, efficacy and safety standards at the state level. The following general monographs have been elaborated for the first time to be included into the State Pharmacopoeia of the Russian Federation, XIV edition: "Viral safety" and "Reduction of the risk of transmitting animal spongiform encephalopathy via medicinal products". These general monographs were elaborated taking into account the requirements of foreign pharmacopoeias and the WHO recommendations. The present paper summarises the key aspects of the monographs.


2020 ◽  
pp. 113-118
Author(s):  
M. G. Shishkin

The article considers the reasons for the formation of asymmetry in the subjects of the Russian Federation. The research is focused on the relations between the Russian Federation and its subjects during the formation of the modern Russian state. This period, according to the author, covers the period from the introduction of the “perestroika” policy in the USSR to the beginning of the 2000s. The author studies the works of domestic and foreign experts on the stated issues. The author believes that the asymmetry of the subjects of the Russian Federation is based on an uneven distribution of economic benefits. The scientific novelty lies in the fact that the author’s conclusions are a synthesis of not only formal legal, but also applied and analytical economic research.


2009 ◽  
Vol 630 ◽  
pp. 77-84 ◽  
Author(s):  
Guillaume Girard ◽  
J. Barresi ◽  
C. Dupuis ◽  
G. Riverin

Scrap rate, throughput, alloy recovery and raw materials are all areas of the casthouse which usually get substantial attention as means of either increasing profits or reducing costs. However, furnaces, which are often overlooked by the casthouse, can also deliver surprisingly high savings. Moreover, these potential savings can only magnify as energy costs and pressures to reduce carbon footprint increase. This paper gives an insight into where savings can be achieved by a casthouse with proper furnace operation. Knowledge of how a furnace should be operated is often neglected but as this paper tries to highlight, developing this knowledge can be extremely worthwhile.


Author(s):  
K. Boddenberg ◽  
B. Kock ◽  
M. Dorfman ◽  
L. Russo ◽  
M. Nestler

Abstract Air separation plants use centrifugal compressors where air and electrical energy are the only raw materials used in the production process. So energy costs play a crucial role and the compressors are heavily penalized when guaranteed performance levels are not achieved. In order to better generate performance, abradable coatings, previously used in the gas turbine industry, have been designed into turbocompressors. This paper will show the optimization and performance improvements of a new aluminium silicon-boron nitride material.


2020 ◽  
Author(s):  
P.A. Kozlov ◽  
A.M. Panshin ◽  
L.I. Leontiev

The increasing demand for zinc and a range of zinc-related metals (for example: lead; indium; tin; cadmium; and copper) in the Russian Federation cannot be satisfied by the existing production plants due to the lack of raw materials. At the same time, ferrous and non-ferrous metallurgy and the chemical industry have accumulated hundreds of millions of tons of zinc wastes (falling into the hazard categories 2 to 4), the processing of which could not only make up the raw material base, but also improve the environmental situation. In the world, over 85% of ferrous dust is recycled using the Waelz process. The Waeltz process is used for distilling separation of elements under reducing conditions. In this study, a block diagram for production of the following elements from industrial wastes is proposed: zinc, cadmium and indium in form of massive metals; zinc and indium in the form of fine powders; and clinker as a raw material for cement production. The technical and scientific details of this new process have been patented in the Russian Federation and abroad. For the first time, the following operations have been implemented with the use of large-sized Waelz kilns: vapour-oxidized Waeltz treatment of polymetallic wastes; recycling of heat from gases and solid products with generation of process fumes; and implementation of alternative flux (dolomite) and alternative fuel (petroleum coke). Keywords: Waelz process, industrial wastes, heat recycling, vapour-oxidized Waelz processing


Author(s):  
A. V. Moshkin ◽  
A. T. Vasyukova ◽  
A. E. Alexeyev

The basic information about functional mixtures is outlined, options for compositions and recommendations for use in baking in mass production are proposed. The characteristic of microbiological, physical and chemical indicators is given, and the results of toxicological studies of dry functional mixtures with fruit and berry powders are given. High-calorie, medium-calorie, and low-calorie composite mixtures have been developed for the centralized production of yeast dough. Dry functional mixtures can be produced according to regulatory documents: TU 9161-004-51926638-11 and TI to TU 9161-004-51926638-11. A patent of the Russian Federation No. 2602629 was obtained for dry functional mixtures with fruit and berry powders. The technological scheme for obtaining a dry functional mixture consists of the following operations: sifting, dosing of prescription components in predetermined proportions: dry egg-milk mixture in the amount of 56.2-61.6% sugar – 20.0-24.3% and salt – 14.1-17.2%. Xanthan (1.06-2.43%) or guar (4.25-5.30%) and fruit and berry powders (1.0-1.5%) are introduced as additional raw materials. Then mixing is carried out, preparation for implementation. The resulting mixture is portioned and packaged in paper bags. Fruit and berry powders were prepared from rose hips, aronia, nettle, bananas, apples and carrots. According to microbiological studies, the degree of contamination during storage during the year corresponds to SanPiN 2.3.2.1078-01, which makes it possible to produce dry functional mixtures with fruit and berry powders for long-term storage. They can be stored in a dry, well-ventilated room in compliance with sanitary rules, with a relative humidity of 65-70% and a temperature of 18-20 °C from 0 to 12 months. It was found that during storage for 12 months. in hermetically sealed paper bags, no powder quality changes were observed. Bakery products made using these mixtures can be recommended for medical, preventive and gerontological nutrition.


2014 ◽  
Vol 3 (1) ◽  
pp. 57
Author(s):  
Abdelaziz Ghanemi ◽  
Besma Boubertakh

Pollution  represents  a  problem  common  to economy and  public  health. Indeed, the public health, because of the  divers’  type of pollutions, is facing divers challenges for which urgent solutions are required.The biology provides approaches not only to deal with the pollution, but also to  obtain  economic  benefits. Some living  organisms  have  particular metabolisms  that allow  them  to  assimilate  and  metabolite  the polluting agents  and thus reduce the  impact  they have on both environment  and public health.  On  the other  hand,  the  metabolic  properties  of  specific organisms make  the  polluting  elements raw materials to  synthesize  other elements that are benefits  for  economy  and  non-toxic  for  the  ecology and  the  biohealth. Yet, other options such as the regulations and laws are  required  to improve the efficiency of these approaches.


2021 ◽  
Vol 93 ◽  
pp. 05004
Author(s):  
Dmitry Rodnyansky ◽  
Ivan Makarov ◽  
Evgeniya Korotayeva ◽  
Vadim Kovrigin ◽  
Vladislav Nazarenko

In modern conditions, issues related to the effectiveness of the regulation of the oil industry by the state are becoming increasingly important. In January 2018, the World Economic Forum was held in Davos, which, in particular, noted the impact of the growth of protectionist trends in the global trade in hydrocarbons, and the impact of climate change on the planet on the export of hydrocarbons. As a result of the forum, the key ways of adjusting the policy of states in the relevant area were identified. At the same time, a significant number of states are already seeing the process of changing state regulation of the industry. In this article, the authors analyzed the systems of state regulation of the oil industry in different countries, and also gave assessments of the possibility of integrating new mechanisms into the system of sectoral management in Russia in the conditions of post-covid reality


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