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摘要: 赤铁矿浮选精矿往往存在因药剂残余导致的细粒精矿过滤困难等问题，为了高效便捷地解决这一问题，选用了十二烷基磺酸钠、十二烷基苯磺酸钠、辛基酚聚氧乙烯醚-10、丁二酸二异辛酯磺酸钠和十六烷基三甲基溴化铵共五种表面活性剂型助滤剂对其进行实验室真空过滤试验研究。以巴西某赤铁矿精矿为研究对象，以油酸钠为捕收剂体系，分别考察了油酸钠用量、助滤剂用量和质量浓度、矿浆pH和温度对滤饼比阻和滤饼含水率的影响。结果表明，随油酸钠用量的增大，滤饼比阻和含水率均增大。最佳用量条件下，五种助滤剂均能使滤饼比阻和含水率降低，其中在室温以及自然pH条件下，十六烷基三甲基溴化铵对滤饼比阻的降低效果最好，十二烷基磺酸钠对滤饼含水率的降低效果最好。矿浆pH和温度对助滤剂降低滤饼比阻的影响幅度不大，而对含水率的影响较为明显。Abstract: In order to solve the filtration problem of hematite concentrate efficiently and conveniently caused by residual chemical reagent, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, octaphenyl polyoxyethyiene-10, dioctyl sodium sulfosuccinate-10 and cetyl trimethyl ammonium bromide were selected for the laboratory vacuum filtration test. For a hematite concentrate in Brazil, the effects of sodium oleate dosage, filter aids dosage and mass concentration, pH and temperature of the pulp on filter cake resistance and filter cake moisture content were investigated with the collector of sodium oleate. The results showed that the filter cake resistance and moisture content of filter cake increased as the sodium oleate dosage increased. Under the conditions of optimum dosage, all the five filter aids could reduce the filter cake resistance and moisture content. And under the conditions of room temperature and natural pH, the cetyl trimethyl ammonium bromide did best on reducing the filter cake resistance, and sodium dodecyl sulfate did best on reducing the moisture content of filter cake. The effects of pH and temperature on filter aids to reduce the resistance of filter cake was not efficient, but obviously on the moisture content.
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Key words:
- surfactant /
- filter aids /
- hematite concentrate /
- filtration
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表 1 试样化学多元素分析结果
Table 1. Multi-elements analysis results of the sample
Element TFe SiO2 Al2O3 S P As Ti Mn Cr Zn CaO Content/% 64.229 4.420 1.900 0.015 0.038 0.003 0.055 0.156 0.006 0.003 0.011 
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表 2 原矿的粒度分布
Table 2. Particle size distribution of raw ore
Size/μm +150 150~74 74~38 38~15 15~10 10~5 -5 Distribution/% 0.29 5.22 11.02 23.85 10.85 16.32 32.45
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