Исследование влияния состава угольных шихт и внепечной обработки кокса на его микроструктуру
Електронний архів E-archive DonNTU – (Electronic archive Donetsk National Technical University)
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| Title |
Исследование влияния состава угольных шихт и внепечной обработки кокса на его микроструктуру
ANALYSIS OF INFLUENCE OF COAL CHARGES CONTENT AND “OUT-OF-FURNACE” COKE TREATMENT ON COKE MICROSTRUCTURE |
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| Creator |
Золотарёв, И.В.
Ильяшов, М.А. Шендрик, Т.Г. Тамко, В.А. Исаева, Л.Н. Збыковский, Е.И. Швец, И.И. |
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| Subject |
микроструктура кокса
полнофакторный эксперимент прочность кокса обработка кокса бораты пористость coke microstructure multifactor experiment coke strength coke treatment borates porosity |
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| Description |
In this work full factorial experiment was carried out to identify technology solutions for the rational use of coal of mine office «Pokrovsky» and the influence of inorganic additives on the quality of the coke. The experiment was performed in a production environment at the private limited company «Makeevkoks» by box-coking. Coking process for the experimental charges proceeds under conditions corresponding to the actual conditions of industrial coke furnaces. Several experimental charges with the brand “K” (mine governance «Pokrovsky») consisting 30, 50 and 70% of coke were prepared for experimental coking. Basic charge without coal of the brand “K” was composed of Ukrainian coal of the other brands (D , F and OS). Processing of the coke was carried out in the chemical laboratory by uniformly spraying the solution of inorganic substances onto the surface of the coke in based on 2.2, 4.8 kg of dry compound per 1 ton of coke. The microstructure of cokes was evaluated with an optical microscope type company MIM-8M LOMO in reflected light in the air (×280) in the ore-polished section. For the quantitative determination of the structure of cokes pore diameters and wall thickness of the cells were measured using ocular micromeries line method with 500 intersections of the particles of the samples. Mathematical model of petrographical coke index in dependence on different content of grade «K» in initial charge and it’s “after furnace” treatment by inorganic agents was obtained. While content of grade «K» in coal charge was increasing, the reduction of quantity of thin walls in cells (<0,2 mm), mean diameter and volume of voids simultaneously with rising of coarse walls in cells and compactness were observed. Adding of coal grade «K» in charge and it’s treatment by borates considerably effects on microstructure and reactivity of obtained cokes. Relatively compact cokes with low reactivity were formed when the content of coal grade «K» and borates was increased. Dependences between parameters of coal microstructure, content of coal grade «K» and «out-of-furnace» treating were shown nonlinear character. Degree and character of coke treatment by tincalconite depends on properties of untreated coke, amount of used tincalconite. Treating of coke by tincalconite (2,4 kg per ton of tincalconite) leads to porosity growth by 4-7 %, treatment by 4,8 kg per ton of tincalconite leads to porosity reduction. Получена математическая модель петрографических показателей коксов в зависимости от различного содержания марки „К” в исходной шихте и послепечной его обработки неорганическими веществами. Увеличение количества угля марки „К” в шихте ведет к уменьшению пористости кокса. Дополнительная обработка кокса раствором буры в основном приводит к дополнительному снижению пористости. |
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| Date |
2014-04-15T14:55:42Z
2014-04-15T14:55:42Z 2014 |
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| Type |
Article
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| Identifier |
УДК 662.749.2:620.1
http://ea.donntu.edu.ua/handle/123456789/25986 |
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| Language |
other
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| Publisher |
Наукові праці ДонНТУ. Серія: Хімія і хімічна технологія. - 2014. - Вип. 1(22). - С. 164-173
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