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一、前言褐煤、柴煤和泥煤用苛性钠萃取,可以制取深棕褐色腐植酸钠。原料来源广泛,制造容易,价格低廉,不与工业用煤争原料,这是腐植酸钠作为选矿药剂应用的突出优点。我国褐煤、柴煤和泥煤的资源极为丰富,著名产地有云南小龙潭、吉林舒兰、黑龙江札赉诺尔、广西百色等地。腐植酸是一种天然存在的聚电解质和螯合剂,在不同pH值条件下,可以与各种金属离子起螯合作用或络合作用。其中反应最强的是Fe~(+++)和Fe~(++)离子,其次是Cu~(++)、Zn~(++)、Mn~(++)、Co~(++)、Ni~(++)、Ca~(++)和Mg~(++)离子等。在浮选矿浆中往往存在着大量难免离子,如Fe~(+++)、Fe~(++)、Cu~(++)、Zn~(++)、Ca~(++)
First, the foreword Lignite, diesel and peat caustic soda extraction, you can get dark brown sodium humate. Wide range of raw materials, easy to manufacture, low prices, not competing with industrial coal raw materials, which is the prominent advantages of sodium humate as a beneficiation application. The resources of lignite, coal and peat in our country are extremely rich. The famous places include Yunnan Little Longtan, Shulan of Jilin, Zhaolinuo of Heilongjiang and Baise of Guangxi. Humic acid is a naturally occurring polyelectrolyte and chelating agent that can chelate or complex with various metal ions under different pH conditions. Among them, Fe ~ (+++) and Fe ~ (++) ions were the strongest ones, followed by Cu ~ (++), Zn ~ (++), Mn ~ (++) ), Ni ~ (++), Ca ~ (++) and Mg ~ (++) ions. There are a lot of unavoidable ions in the flotation slurry, such as Fe ~ (+++), Fe ~ (++), Cu ~ (++), Zn ~ (++), Ca ~ (++)