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Том 60, № 11 (2017)
- Год: 2017
- Статей: 6
- URL: https://journal-vniispk.ru/1068-364X/issue/view/13952
Coal
Efficiency of Batch Preparation at Makeevka Coke Plant
Аннотация
The operational efficiency of the batch-preparation shop is assessed, in terms of the uniformity of batch quality. The importance of batch uniformity in the production of blast-furnace coal of stable quality is confirmed. Analysis of individual stages of coal preparation permits the development of batch-uniformity coefficients that may be used in assessing the ability to produce batch of stable quality. In an industrial experiment, the mixing efficiency of coal concentrates is determined in dosing, crushing, and transportation of the final batch to the coke shop.
411-418
Petrographic Characteristics of Kuznetsk Basin Gas Coal
Аннотация
The petrographic characteristics of bed samples of gas coal from different locations in the Kuznetsk Basin are studied. Analysis of reflection patterns permits identification of the petrographic features affecting the behavior of coal in high-temperature coking. Additional assessment of the physicochemical properties of the coal permits expanded utilization of the large reserves of gas coal in coke production.
419-423
Coke
424-428
Chemistry
429-432
Sorption of Manganese Cations by Modified Humic Acids from Lignite
Аннотация
The sorption of Mn2+ ions from aqueous solutions of humic acids derived from Tisul’sk lignite is investigated. The influence of treatment of the humic acids by hydrogen peroxide on their sorptional characteristics is considered. The sorptional capacity of modified and unmodified humic acids for the manganese cation is determined. IR, NMR, and ESR spectroscopy shows that the greater sorptional capacity of humic acids after modification by hydrogen peroxide may be attributed to change in their functional composition.
433-438
Effect of Ionic Liquid 1-Butyl-3-Methyl-Imidazolium Dihydrogen Phosphate Pretreatment on Pyrolysis of Lignin
Аннотация
In order to improve the yield of liquid fraction and phenolics content during lignin pyrolysis, an effective method of lignin pyrolysis through the pretreatment of lignin by an acidic ionic liquid 1-butyl-3- methyl-imidazolium dihydrogen phosphate ([Bmim]H2PO4) at low temperature is investigated in this study. It is found that [Bmim]H2PO4 pretreatment increases the total yield of liquid products of lignin pyrolysis compared to that of original lignin. The [Bmim]H2PO4 pretreatment temperature significantly impacts the behaviors of the lignin pyrolysis. In the temperature range of 50 to 150°C, the yield of the overall liquid product obtained by pyrolysis of the sample pretreated at 50°C is the highest. After pretreatment, the [Bmim]H2PO4 can be efficiently recovered, but the structure and stability of the [Bmim]H2PO4 have been changed. The FTIR analysis shows that the ionic liquid [Bmim]H2PO4 pretreatment can break hydrogen bonds, ether linkages and ester bonds in lignin.
439-444