共查询到16条相似文献，搜索用时 859 毫秒
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柴达木盆地是我国重要的钾肥基地,年产氯化钾超过700×10~4t,副产尾盐超过1 000×10~4t,尾盐的主要组分是氯化钠,并夹带少量的氯化钾。通过精制试验研究,进一步回收氯化钾,氯化钠则作为纯碱原料,实现了尾盐的梯级综合利用,对促进盐湖循环经济发展具有重要意义。试验表明,采用二段洗涤工艺,结合喷淋和搅拌两种洗涤方式处理钾肥生产浮选尾盐,浮选尾盐经二段洗涤所得产品中氯化钠含量达到92.54%,符合纯碱所需原盐指标要求;母液中的氯化钾富集到一定程度后,回收可作为钾肥生产原料。 相似文献
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采用细粒筛分法部分提纯粗粒光卤石，筛下细粒产品通过反浮选法提纯，试验表明可以大大提高产品纯度和收率，是一种方便、简单、节能和加工成本较低的提纯方法。 相似文献
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前言浮选法生产工业氯化钾的工艺中,以脂肪族伯胺作为浮选捕收剂。其中最常用的为十八烷基胺。在生产过程中捕收剂最后大部分富集在产品氯化钾中。如产品作工业用(例如,用于电解法制取氢氧化钾的原料),少量有机胺的存在将影响产品质量。因此有必要测定氯化钾产品少量脂肪胺。尾矿主要为氯化钠,如作食用,测定有机胺尤为必要。 相似文献
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针对氯化钾生产中不同类型的光卤石原矿,因其镁钾比和钠钾比失调,而影响浮选工艺的控制,使最终产品质量和收率低下,不能使原矿得到充分有效利用。通过原矿的掺兑可以改善原矿的组成结构,并可调整原矿镁钾比和钠钾比。比例掺兑后不仅使原矿得到有效回收和利用,也大幅度提高了最终产品氯化钾的质量和产量,在实际生产中具有积极的推动作用。 相似文献
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马海盐湖钾资源经过十几年的开发,在生产氯化钾过程中排放了大量的含钾尾盐,随着盐湖钾资源持续的开发,马海盐湖的钾资源已凸显日益枯竭的趋势,为高效利用马海盐湖的钾盐资源,近年来开展了对浮选法生产氯化钾过程所排放的含钾尾盐矿的开发利用技术研究。介绍了采用强制搅拌溶浸技术,溶浸马海盐湖含钾尾矿中钾资源的试验情况及所取得的试验结果,并对试验过程中出现的问题进行了讨论。 相似文献
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Kerosene, a grade mineral oil, is commonly used to extract beetles from sediment. Here, the use of kerosene to extract chironomid
head capsules was tested on 10 samples from sediment of different lakes, with different organic matter content as measured
by loss on ignition, and estimated ages. Our results revealed that this flotation tool is very effective in extracting either
full or half chironomid head capsules. The mean extraction efficiency was 89.3 ± 8.0% with an estimated relative abundance
error ranging from −1% to 1% for 46 of the 57 identified taxa. Larger chironomids (400–500 μm width), which are often full
of sediment particles, have the highest relative abundance error, with a maximum of 4.3% for Corynocera oliveri-type. A canonical correspondence analysis showed that, despite this small bias, samples retrieved with the kerosene flotation
do not differ from the whole sample assemblages. These results give us confidence in the use of this flotation technique for
chironomid sample preparation. 相似文献
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察尔汗盐湖是我国最大的可溶性钾镁盐矿床,以相图理论为依据,介绍了反浮选—冷结晶法从含钠光卤石制取氯化钾的相图分析。 相似文献
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An environmental chamber was used to simulate a 24-h cycle of rock surface temperature and relative humidity, a stone pavement with differing levels of sodium chloride content, and differing levels of fog precipitation to assess some of the controls of rock weathering in the vicinity of Swakopmund in the Namib Desert. The rock employed was Cretaceous Chalk. Some treatments were effective at causing disintegration after 76 temperature/humidity cycles and 10 fog cycles. Small amounts of fog moisture (0.5 mm per event) were associated with the greatest amounts of breakdown, whereas the amount of salt in the simulated pavements appeared to be of less significance. The experiment showed that sodium chloride can be an effective agent of weathering in a coastal foggy environment. 相似文献