【摘要】 为改善赤铁矿磨矿效果,以鄂西某赤铁矿为研究对象,结合赤铁矿浮选所用常规调整剂,选取碳酸钠、石灰、六偏磷酸钠三种药剂,研究它们在不同磨矿浓度及不同用量条件下对赤铁矿磨矿作用的影响。试验结果表明:三种药剂对赤铁矿磨矿效果的影响由强到弱依次为六偏磷酸钠、碳酸钠、石灰,且石灰过量反而会恶化磨矿指标。六偏磷酸钠或碳酸钠在磨矿浓度为60%时,磨机排矿产品中-0.074 mm粒级产率最高;石灰在磨矿浓度为50%时,磨机排矿产品中-0.074 mm粒级产率最高。在高磨矿浓度下,药剂对赤铁矿磨矿作用的促进效果更为明显,在试验最高磨矿浓度(70%)时,磨机排矿产品中-0.074 mm粒级产率提高的幅度较磨矿浓度为60%和50%都要高。更多还原

【Abstract】 In order to improve the grinding effects of hematite, using the hematite from western Hubei province and combining with the conventional regulators of hematite, the three kinds of reagents of sodium hydroxide, lime and sodium hexametaphosphate were selected. Different grinding concentrations and different dosage of reagents were considered. The experimental results indicated that the effect of three kinds of agents are from strength to weakness on hematite grinding as follows: sodium hexametaphosphate,sodium carbonate, lime, and too much lime could make the grinding indicators worse. The content of-0.074 mm size fraction is the highest when the grinding concentration is 60% by adding sodium hexametaphosphate or sodium carbonate, but the 50% of grinding concentration leads to higher yield of-0.074 mm size when lime was added. There was more significant influence on grinding of hematite when the grinding concentrating was higher. Compared with the grinding concentration of 60% and 50%, the content of-0.074 mm size fraction was improved higher when the grinding concentration is 70% in this test.更多还原