Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 1

Леонтьев, Л. И.; Григорович, К. В.; Костина, В. М.

doi:10.17073/0368-0797-2016-1-11-22

Cited by 14 publications

(4 citation statements)

References 17 publications

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“…Pellets with an increased amount of moisture in the heating zone are destroyed due to the intense vaporization. As a result a layer is clogged with fines, gas permeability is decreased, the quality becomes worse and the yield of a good product is decreased [10,11]. Therefore, the implementation of drying processes in the optimum conditions of power consumption and maximum speed is of great importance for practice [12].…”

Section: Technogen-2019mentioning

confidence: 99%

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Мешалкин

Бобков

2020

Kms

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This research proposes a systematic approach for the analysis of volumes, physicochemical, granulometric, lithologic and thermal characteristics of waste from ore-dressing and processing enterprises stored in the dumps (tailing dumps) of ore-dressing and processing plants to assess the economic potential of its use in the system of complex power and resource efficient environmentally safe processing including palletizing machines, conveyor indurating machines and ore–thermal furnaces. The obtained results allow the authors to formulate the basic engineering, technological, economic and environmental requirements for complex chemical and power engineering systems of processing technogenic waste from ore-dressing and processing plants, these results make it also possible to define the degree of variability for the characteristics of the waste lots from various dumps. The paper describes the developed intensional and mathematical formulations for the multiscale problem of optimizing chemical and power engineering processes of technogenic raw materials processing in a complex chemical and power engineering system as a problem for discrete dynamic programming. The distinctive feature of this problem is to take into account the spatio-temporal multistage processing in a moving multilayer mass of pelletized raw material, the intensity of the process of internal moisture transfer and the variables for the control flow of the heat carrier gas. It allows increasing power efficiency by intensifying heat and mass transfer processes of multilayer drying, calcination and sintering. The criterion of the efficiency is the minimum cost of electric and thermal energy spent on processing. The obtained results were used to calculate power efficient environmentally safe processing of technogenic waste from ore-dressing and processing enterprises dumps. It was defined that heat and mass transfer processes are intensified, power consumption is reduced and the quality of the finished product is increased in the conditions of optimal power and resource efficient operation for the processing system. Keywords: tecnhogenic waste, waste processing, ore-dressing and processing plant, power and resource efficiency, optimization, system analysis, environmentally safety

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Section: Technogen-2019mentioning

confidence: 99%

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Мешалкин

Бобков

2020

Kms

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“…В первой части обзора [4] уже было сказано о перс-пективных способах получения нанопорошков. Однако следует отметить перспективный метод СВС, разра-ботанный в Институте структурной макрокинетики и проб лем материаловедения РАН (ИСМАН).…”

Section: методы синтеза нанопорошковunclassified

Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 2. Powder Nanomaterials

Леонтьев¹,

Алымов²

2016

Izv. vysš. učebn. zaved., Čern. metall.

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“…The most important and significant direction of ensuring sustainable development of the metallurgical industry in modern Russia is the creation of energy-saving technologies [1,2]. Obviously, the greatest efficiency of energy saving should be expected in industries consuming mineral resources, which, of course, include the production of iron ore pellets [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Granulometric Composition of the Feedstock Influence on Mechanical Properties of Iron Ore Pellets

Бобков

Morgunova

2022

MSF

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The paper investigates the effect of high-temperature roasting and cooling modes of roasted iron ore pellets on their strength and porosity. These characteristics depend on the initial iron ore raw materials properties, the parameters of the raw pellets, the firing temperature, the holding time at this temperature, the heating and cooling rate, and take into account the change in these indicators in connection with the chemical and mineralogical compositions of the pellets. It has been established that the strength of iron ore pellets obtained at the optimum firing temperature depends on the characteristics of the initial finely dispersed iron ore raw material. The relationship between the content of draw rock and the strength of calcined pellets has been revealed. A significant influence of the raw pellets porosity on the strength of the calcined pellets was found. It is shown that the crushing strength of pellets cooled in air is higher than the strength of pellets cooled with water, and a decrease in the final cooling temperature leads to an increase in the strength of the pellets. It is substantiated that the heating rate should not exceed the rate of gas diffusion, and with a decrease in the size of finely dispersed iron ore raw materials, the shrinkage of the pellet layer increases during heating. It is shown that shrinkage appears at temperatures lower than the optimal calcining temperature and insignificantly affects the strength of the pellets. The results obtained can be used to substantiate resource-and-energy efficient operating modes of horizontal-grate machines in ferrous metallurgy.

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Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 1

Cited by 14 publications

References 17 publications

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 2. Powder Nanomaterials

Analysis of the Granulometric Composition of the Feedstock Influence on Mechanical Properties of Iron Ore Pellets

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