(北京科技大學(xué) 土木與環(huán)境工程學(xué)院，北京 100083)
摘 要: 以石英和菱鎂礦單礦物為試樣，研究菱鎂礦不同粒級(jí)對(duì)其可浮性的影響，考察調(diào)整劑KD-1(含鈣的鹽類化合物)和苛化玉米淀粉對(duì)單礦物上浮率的影響。結(jié)果表明：隨菱鎂礦粒度的逐漸減小，上浮率增加，證明細(xì)粒菱鎂礦的上浮主要是由于泡沫的機(jī)械夾帶作用；調(diào)整劑KD-1可以有效地降低泡沫的粘度從增加其流動(dòng)性，因此有利于石英與菱鎂礦的浮選分離；苛化玉米淀粉可很好地抑制細(xì)顆粒菱鎂礦，而對(duì)石英的影響較復(fù)雜。
關(guān)鍵字: 菱鎂礦；石英；粒度；調(diào)整劑；反浮選
（School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:The loss of fine magnesite to the tailing in the process of separating quartz from magnesite by reverse flotation with the amine as collectors was investigated. The effects of some factors were investigated using pure quartz and magnesite as samples. The factors studied include particle size of magnesite, KD-1 and corn starch used as regulators. KD-1 is a trade name of a regulator mainly consisted of salts of calcium. The results show that, with the particle size declining, the floatation rate increases dramatically. This proves that the fine magnesite floated with the froth mainly due to the mechanical entrainment. The regulator KD-1 is favor of flotation separation quartz from magnesite, it can reduce effectively the viscosity of froth and increase its fluidity. Corn starch is the better depressant for fine magnesite. The effect of corn starch on the flotation of quartz is complex.
Key words: magnesite; quartz; particle size; regulator; reverse flotation
ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK
ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW