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双碱法净化胶磷矿选矿水的研究与工业实践 总被引:1,自引:0,他引:1
某胶磷矿选矿工艺为在碱性介质中正浮选富集磷,在酸性介质中反浮选脱镁,由于选矿药剂种类多,精矿水中与尾矿水中游离离子差异很大,所以本研究集中收集选矿废水并采用双碱沉淀法对控制水中SO42-和PO43-的质量浓度进行了试验,结果表明处理后的废水满足浮选的要求,实现了选矿废水的循环利用,达到了零排放。 相似文献
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锦屏磷矿选矿废水,由于残存浮选药剂,其pH值、COD、BOD~5等均严重超标。本文就处理工艺进行探讨和论证,并推出回水—自然沉降—活性污泥法新工艺。该工艺把选矿工艺和水处理工艺有机地结合起来,并以引入生化处理单元操作为特色。小试验结果表明:该工艺处理锦屏磷矿选矿废水是相当成功的。不仅工艺流程简单,处理成本低廉,而且处理出水水质良好,有害物质消除在废水处理工艺过程中;同时由于利用了选矿设施且筛选培训成功能降解浮选药剂的JP类菌群,使处理少量高浓度回水得以实现。经济效果显著。 相似文献
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用工业废碱水处理反渗透法高含盐排放浓水 总被引:2,自引:0,他引:2
反渗透处理装置排放的浓水含盐量很高,如果不经处理直接排放势必对周围环境造成污染和水的浪费,氧化铝生产工艺废水中含有大量的碳酸钠、苛性碱等碱类物质,pH值达到13左右,回水量约2000m^3/h,用这些废水和反渗透浓水混合进行软化处理,降低浓水中的钙镁离子含量,并对难去除的硫酸盐进行稀释降低浓度,回用到蒸发循环水系统作为补充用水、氧化铝生产部分工艺用水、设备冷却用水,达到浓水回收再利用的目的。该方案实施后效果十分显著,回收反渗透浓水约60m^3/h,减少污水系统补充新水,降低生产用水费用约每年176万元。 相似文献
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S—711是一种组分简单,性质稳定的磷矿选矿抑制剂,用于硅钙质磷块岩矿石浮选,可取得与S—808相近的选矿指标。由于S—711的用量少,毒性小,选矿废水易于处理,是S—808的较好的代用药剂。棉浆造纸黑液亦是一种有效的抑制剂,可以代替S—808在磷矿浮选中使用。 相似文献
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磷矿浮选受温度影响较大,尤其是正浮选作业,随着温度的升高,精矿产率、回收率相应升高,药剂用量降低。为提高磷矿浮选温度,在距离化工厂较近的浮选厂,可以考虑利用化工废热,提高浮选矿浆的温度,提高各项浮选指标。 相似文献
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针对云南磷矿的特点,用油酸作为捕收剂、水玻璃作为抑制剂、碳酸钠作为介质调整剂,对硅钙(钙硅)质磷块岩进行正浮选脱硅,从矿石性质、浮选药剂及正浮选药剂脱硅机制方面对正浮选工艺进行了探讨,以期提高浮选药剂的选择性,达到提高磷精矿品位的目的. 相似文献
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A flotation column was used to recover oil from oil in water emulsions. The feed oil concentrations investigated were relatively high, in the range of 0.25 to 8 percent by volume. Previous studies using conventional flotation cells dealt with very dilute systems where the oil concentration was less than 0.1 percent by volume. The oil recovery was found to decrease with an increase in the feed oil concentration. The addition of wash water to the froth zone of the column had little effect on the oil recovery. The oil recovery decreased with increasing feed flow rate and surfactant concentration. The effect of increasing the gas flow rate was to initially increase the oil recovery. The oil recovery data were analyzed using a kinetic model. The order of the flotation kinetics was found to be 0.6. The gas hold-up behaviour of the recovery and the froth zones of the flotation column is found to correlate well with the drift-flux model. 相似文献
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M. Uçurum 《Powder Technology》2009,191(3):240-246
The purpose of this study was to investigate the influences of Jameson flotation operation variables on the recovery and kinetics of unburned carbon (UC). The waste sample of petroleum coke, filter powder or fly ash, used in the experiments was collected from lime calcination plant tailings. The effect of Jameson flotation parameters on the recovery and kinetics efficiencies of UC was systematically studied. The feasibility of separating unburned carbon and refuse was determined from the combustible recovery (CR) and ash reduction (AR) (%) curves. Within the range studied, the optimum diesel oil dosage was 3500 g/tonne, pine oil dosage was 2500 g/tonne, pulp density was 15%, wash water rate was 0.17 cm/s and downcomer immersion depth was 50 cm. The results indicate that the Jameson flotation technique is effective in removing the UC from waste filter powder. Furthermore, the classical first-order kinetic flotation model (R = R∞ [1 − exp (− k ? t)]) was applied to data from the tests. The model was evaluated by statistical technique, after non-linear regression on the model parameters. It is found that the classical first order flotation kinetic model, most extensively used among flotation models, fits the tests data very well. 相似文献
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通过分析黑钨矿浮选药剂应用现状,总结近年来黑钨矿浮选捕收剂应用实践。其中含胂和膦的脂肪酸类捕收剂含有有害金属,对环境中土壤以及水有极大的污染;螯合剂使用前需预先处理,不仅增加了成本和流程复杂,同时也危害环境;组合药剂的使用提高了药剂效率,节约资源,通过减少使用对环境有污染的药剂,保护了环境。并采用PAC、PFS及其组合絮凝剂对捕收剂使用后废水进行处理,结果表明:PAC及PAC+PFS处理后废水排放达到《污水综合排放标准》(GB8978-1996)的一级标准,而PFS处理则没有达到一级标准。 相似文献