Utilization of the prepyrolyzed technical hydrolysis lignin as a fuel for iron ore sintering
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 1, Issue 6
Abstract
<p>A promising direction of technical hydrolysis lignin utilization is metallurgical production, primarily iron ore preparation and blast furnace process. A significant potential is concentrated in the sintering process. In order to improve properties of lignin in the role of a fuel, and to remove, with the possibility of trapping, toxic substances, it is necessary to carry out preliminary pyrolysis. The effect of technical hydrolysis lignin of different pyrolization degrees on the iron ore sintering process and properties of the obtained sinter is experimentally studied. Initial lignin was subjected to preliminary heat treatment to the final temperature of 400, 600, 800 and 1000 ºС without air access. Sintering with the participation of pyrolyzed lignin has been carried out via lab-scale sinter pot. After sintering, the sinter strength and the macrostructure have been determined. The chemical composition of the sinter samples has been revealed by X-ray fluorescence analysis.</p><p>As a result of the experiments, the possibility of replacing 25 % of coke breeze with lignin prepyrolyzed at 800 ºС has been determined. Under these conditions, the main indicators of the sintering process, such as vertical sintering rate, product yield and specific capacity of the lab-scale sinter pot, remain virtually unchanged. There is a slight decrease in the impact strengths and the abrasion strengths of the sinter. However, these figures remain at a technologically acceptable level. It should be noted that when using lignin as a sintering fuel, there is a tendency for some decrease in the iron content of the sinter produced with it. The study of the sinter macrostructure has shown an increase in the pore diameter when the partial replacement of coke breeze with lignin while with the increasing lignin pyrolysis temperature the pore volume increases.</p>The studies has evidence the possibility of solving the urgent environmental issues of technical hydrolysis lignin utilization by applying it in the sintering process with preliminary pyrolization. A promising direction for further research is the development of methods for the preparation of technical hydrolysis lignin for the use in iron ore sintering
Authors and Affiliations
Lina Kieush, Maxim Boyko, Andrii Koveria, Alexander Khudyakov, Artem Ruban
Keywords
Related Articles
- EP ID EP666197
- DOI 10.15587/1729-4061.2019.154082
- Views 84
- Downloads 0
Robust identification of non-stationary objects with nongaussian interference
<p>The problem of identification of non-stationary parameters of a linear object, which can be described by the first-order Markov model, with non-Gaussian interference is considered. The identification algorithm is a gr...
Numerical methods for contact analysis of complex-shaped bodies with account for non-linear interface layers
<p>In order to ensure high technical characteristics of machines for various applications, it is necessary to increase the strength of the most loaded and heavy-duty elements of constructions, which are complex-shaped co...
Analysis of the developed quantitative method for automatic attribution of scientific and technical text content written in Ukrainian
<p>A formal approach was proposed to implement text content attribution. The study was conducted with Ukrainian scientific and technical texts. The results of application of the designed algorithms of automatic attributi...
Substantiation of parameters and operational modes of air solar collector
<p>We developed a new design of an air solar collector for a fruit dryer including double glazing and a selective surface made of a thin metal substrate with inlet and outlet openings on its bottom. We established that i...
Identification of properties of recycled highdensity polyethylene composites when filled with waste mud solids
<p>The possibility of increasing recycling volumes of drilling waste using as a filler for producing polymer composites is considered. As a result of the research, modification of recycled high-density polyethylene with...