乙烯基吡啶-烷基亚砜共聚物改性焦煤浮选

IF 0.5 Q4 ENGINEERING, CHEMICAL
V. N. Petukhov, T. G. Voloshchuk
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引用次数: 0

摘要

研究了以乙烯基吡啶和烷基亚砜共聚物为改性剂浮选煤的情况。在煤粉中以0.5 ~ 1.0 g/t的掺量添加改性剂,可改善浮选参数:精矿可提出较多的可燃煤体;而且随着浮选废物的流失,煤的有机质量也减少了。改性剂的有效性取决于大分子中亚砜基和乙烯基吡啶基的数量及其分子质量。采用分子量为17500的50B改性剂,提高大分子中硫基含量,浮选效果最佳。改性剂在捕收剂前引入浮选室效果更好。由于改性剂分子吸附在煤表面的能量活跃部分,浮选得到改善。具体地说,共聚物的极性基团是由氢键连接的,烃基团取向于水相。这样可以确保在添加捕收剂之前提高煤的疏水性。因此,可以降低收集器的消耗。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Improved Coking Coal Flotation with Vinyl Pyridine–Alkyl Sulfoxide Copolymers as Modifiers

Improved Coking Coal Flotation with Vinyl Pyridine–Alkyl Sulfoxide Copolymers as Modifiers

Coal flotation when using copolymers of vinylpyridine and alkyl sulfoxides as modifiers is investigated. When the modifiers are added to coal fines at a rate of 0.5–1.0 g/t, the flotation parameters are improved: more combustible coal mass is extracted with the concentrate; and less of the coal’s organic mass is lost with the flotation waste. The effectiveness of the modifier is determined by the quantity of sulfo groups and vinylpyridine groups in the macromolecule and also by its molecular mass. The flotation is best when using 50B modifier with molecular mass 17 500 and an increased sulfo group content in the macromolecule. The modifier is more effective when it is introduced in the flotation chamber before the collector. The flotation is improved because modifier molecules are adsorbed at the energetically active sections of the coal surface. Specifically, polar groups of the copolymer are attached by hydrogen bonds, with the hydrocarbon groups oriented into the aqueous phase. That ensures increase in hydrophobic properties of the coal before the collector is added. As a result, lower consumption of the collector is possible.

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来源期刊
Coke and Chemistry
Coke and Chemistry ENGINEERING, CHEMICAL-
CiteScore
0.70
自引率
50.00%
发文量
36
期刊介绍: The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.
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