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 83
- Downloads 0
Devising an engineering procedure for calculating the ductility of a roller bearing under a no-central radial load
<p>Known theoretical approaches to calculating the ductility of rolling bearings include rather complicated analytical dependences and require cumbersome computation. That makes it a relevant task to undertake a research...
Flow visualization of water jet passing through the empty space of crossflow turbine runner
<p class="TTPAbstract">Hydropower plants are a form of renewable energy resources, which comes from flowing water. The turbine is used to drive the generator then convert mechanical energy into electrical energy. The tur...
Geometrical modeling of the process of weaving a wire cloth in weightlessness using the inertial unfolding of a dual pendulum
<p>We proposed a geometrical model for weaving a wire cloth using the oscillations of a system of two-link pendulums within an abstract plane and under conditions of weightlessness. It is expected to initiate oscillation...
Studying the effect of concentration factors on the process of chemical metallization of powdered polyvinylchloride
<p>Influence of concentration of components of chemical metallization solutions on the process of copper reduction on activated polyvinylchloride surface has been studied. It has been established that changes in concentr...
Results of numerical modeling of the process of harvesting the seeds of flax by a harvester of the stripping type
<p>The purpose of the current theoretical study is to improve the efficiency of the technological process of harvesting flax seeds with a harvester of the stripping type by substantiating its structural-operational param...