共查询到18条相似文献,搜索用时 46 毫秒
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对黄陵一号煤矿选煤厂选煤方法的选择及技术改造的必要性进行了探讨,指出浮选精煤可采用加压过滤机进行脱水及浮选尾煤可采用快开压滤机进行脱水。 相似文献
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介绍KYF-70充气机械搅拌式浮选机的结构特点,测定70 m3浮选机在精选段作业的矿浆悬浮能力及带矿条件下的充气量.矿浆悬浮能力测试表明KYF-70充气机械搅拌式浮选机对-45μm含量高于80%的矿浆悬浮能力好,槽内矿浆粒度分布均匀,液面稳定.应用情况表明,KYF-70充气机械搅拌式浮选机应用于精选段作业浮选效果良好,... 相似文献
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攀枝花粗钛精矿精选工艺流程研究 总被引:1,自引:0,他引:1
攀枝花选钛厂的粗钛精矿含-0.074mm粒级15%~30%,现采用单一电选的精选流程,存在精选回收率低,电选车间粉尘大的问题。研究的粗钛精矿筛分分级、精粒电选、细粒浮选新型精选流程,采用广州有色金属研究院研制生产的GYX31-1007型高频细筛作筛分设备,筛下物浮选采用改性的塔尔油作捕收剂,获得钛精矿品位47.74%TiO2,精选作业回收率78.13%TiO2的工业试验指标。比同期单一电选的精选作业回收率提高了3.46%,电选车间的粉尘降低了55.73%。 相似文献
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针对吉家洼金矿氰化尾矿品位偏高,对氰化尾矿采用浮选回收金工艺获得金精矿品位39.60 g/t,回收率41.00%较高的技术经济指标.对金矿尾矿再回收有较好的指导意义. 相似文献
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首次提出和论述了精精矿分支精选选锂浮选工艺流程(简称分支工艺,以下同)的工艺特征及其采用该流程取代选矿厂现行一次祖选、两次精选、一次扫选、中矿顺序返回的传统选锂浮选工艺流程(简称传统工艺,以下同)的可行性。由于分支工艺的研究获得成功,使三十年一贯制的传统工艺第一次受到冲击,从而形成了选锂工艺多元化的新格局,为进一步提高选锂技术指标和选矿厂经济效益开辟了新的、更加广阔的途径。 相似文献
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《Minerals Engineering》1999,12(4):367-381
A performance optimization study has been conducted using a laboratory Jameson Flotation Cell, which resulted in the development of empirical models for four key response parameters, such as product ash content, product total sulfur content, combustible recovery and separation efficiency. The empirical models were utilized to identify an appropriate experimental region to achieve a target set of metallurgical performances from the treatment of a flotation feed sample. The separation performance obtained from the treatment of three additional coal samples used in this investigation indicate that a high positive bias factor of about 0.6, which translates to a wash water ratio of 2.5, is required to produce superior quality coal especially from the treatment of high ash coals. The separation performance obtained using the same orifice—downcomer combination with various size separation chambers indicate that the diameter of the separation chamber of the Jameson Cell can be potentially reduced without affecting the separation performance. In other words, more number of downcomers can be used with the same size cell, which will significantly improve the throughput capacity of the Jameson flotation technology without sacrificing the separation performance. 相似文献
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分析了芦岭煤矿洗煤厂浮选精煤脱水存在的问题,介绍了用卧式沉降离心脱水机对浮选精煤直接脱水,溢流和滤液脱泥后再浮或直接再浮,精矿采用快开压滤机脱水的二段脱水工艺,该工艺较好地消除了精矿泡沫对生产的影响,解决了芦岭矿洗煤厂浮选精矿脱水的难题. 相似文献
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Low pulp density and low grade slurries in the coal and minerals industries are discharged as waste to tailings dams, incurring significant losses of valuable particles. This paper investigates the rapid processing and cleaning of hydrocyclone overflow coal slurry using two laboratory scale Reflux Flotation Cells in series as a means to economically beneficiate low quality tailings streams. The Reflux Flotation Cell incorporates a novel arrangement of inclined channels to enhance bubble-liquid segregation, enabling extremely high gas rates and liquid rates per unit of vessel area. Hence, in the first stage, fast flotation is employed to rapidly recover fine coal particles using a feed flux of 11.4 ± 0.5 cm/s, up to an order of magnitude increase in the throughput rate over conventional flotation systems. First stage product was then sent to a second stage for counter-current washing using fluidisation wash water to produce a fully deslimed product, having ash percent in agreement with the minimum ash attainable using flotation as determined through tree flotation analysis. The results demonstrate the potential for two-stage Reflux Flotation to deliver high throughput at a high separation efficiency from low quality slurry, with a fivefold reduction in the required vessel footprint, thus overcoming the principal economic deterrent of having to install banks of large-scale flotation cells. 相似文献
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粒度组成细、高灰细泥含量大的煤泥浮选时,浮选精煤易于超灰且精煤产率低、生产操作困难。针对这些问题,在总结载体浮选理论的基础上,研究了以浮选精煤作为自载体改善煤泥浮选效果的作用和机理。结果表明:用浮选出的精煤作自载体可显著改善煤泥的浮选效果。随自载体量的增加,精煤产率、浮选完善指标、尾煤灰分均提高,浮选精煤灰分降低。乌海煤泥采用该工艺浮选时,确定出最佳自载体用量为入浮煤泥的10%,加入自载体经4次循环后即可达到稳定的浮选效果,浮选精煤产率提高7.11%、灰分降低1.14%,浮选完善指标提高7.25%。EDLVO理论的计算研究表明,精煤本身的疏水性和捕收剂在煤粒表面吸附产生的疏水力,促使细煤粒黏附于粗颗粒载体,细颗粒间也会发生疏水絮凝,改善了浮选环境和浮选效果。 相似文献