共查询到19条相似文献,搜索用时 109 毫秒
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用硫酸浸出——置换——净化法分离回收铜锌废渣中的铜锌,产出海绵铜和氧化锌。铜、锌的漫出率分别达到98.99%和99.50%,铜、锌的回收率均达97%以上。工艺条件较易控制,产品海绵铜品位大于75%,氧化锌达到二级标准。 相似文献
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用硫酸浸出经焙烧脱硫后的锌精矿,并通过一系列步骤,制得产品氧化锌。产品氧化锌纯度达98.2%以上,其它指标也符合产品标准.锌的回收率达到90%以上。 相似文献
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铅烟化炉次氧化锌生产电锌的工艺研究 总被引:3,自引:1,他引:3
进行了焙烧脱氟氯-酸浸-氧化除杂-电解工艺处理铅烟化炉次氧化锌的研究。试验结果:锌直收率87.02%,回收率89.25%,阴极锌质量100%达0~#锌品级。 相似文献
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进行了焙烧脱氟氟-酸浸-氧化除杂-电解工艺处理铅烟化炉次氧化锌的研究。试验结果:锌直收率87.02%,回收率89.25%,阴极锌质量100%达0^#锌品级。 相似文献
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本文介绍沿河铅锌矿,主要有价矿物为闪锌矿,其次为方铅矿,试验采用先铅后锌的优先浮选流程,可获得锌精矿品位51.25%,锌回收率95.82%。该成果已作建厂设计依据。 相似文献
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从低品位铅锌矿制备氧化锌和红丹 总被引:2,自引:0,他引:2
钟晨 《有色金属(冶炼部分)》1998,(6):23-25,40
本文研究了从低品位硫化铅锌矿直接制取高质量氧化锌和红丹的技术条件,氯化浸出温度80~90℃、氯/矿=(0.65~0.7)∶1时,锌、铅浸出率可分别达到96.4%和99.3%,产品红丹和氧化锌的质量均超过国标一级品标准 相似文献
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本文研究了用氨浸法回收废旧干电池的新工艺。干电池中的锌、锰分离比较彻底,并能获得纯度为98%以上的化工产品氧化锌和二氧化锰,锌、锰的回收率分别达到94.1%,和97.6%,干电池中的Hg及HgCl2以气钵形式加以冷凝回收,无二次污染。 相似文献
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对江西地区某银铅锌多金属矿进行选矿试验研究,原矿组成复杂且矿物间嵌布关系复杂,原矿中的有价元素主要以硫化矿形式存在,入选矿石品位为Ag 158.9 g/t、Pb 2.01%、Zn 2.95%.为了更好地实现银铅锌元素综合回收,选用“硫化银铅浮选-锌硫混合浮选再分离锌-锌硫混浮尾矿再选硫”流程工艺进行浮选,最终获得Pb品... 相似文献
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国外某铅锌多金属矿石含铅4.55%、锌5.78%,共生关系复杂,嵌布粒度极细,而且铅、锌矿物可浮性相近。为综合回收各有用矿物,采用"铅锌优先浮选"流程,对该矿石进行了详细的选矿试验研究。最终试验成功实现了铅、锌矿物分离,获得了铅品位51.23%、回收率为86.43%的铅精矿,以及锌品位46.64%、回收率为87.74%的锌精矿。 相似文献
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采用氢氧化钠和碳酸钠混合碱液洗涤脱除次氧化锌中的氟氯。在碱液中氢氧化钠和碳酸钠摩尔比为1∶1,控制液固比、洗涤温度时,氟、氯脱除率分别为92.31%和96.57%。碱洗液经沉锌、沉氟、沉氯处理,溶液中锌、氟、氯浓度分别为0.37、0.048、0.083g/L。采用锌电解废液浸出经碱洗脱除氟氯后的次氧化锌,控制电解废液硫酸浓度、液固比、浸出温度,浸出液中锌、铅、氟、氯浓度分别为86.27g/L、0.027g/L、0.042mg/L、0.078mg/L,浸出渣中锌和铅含量分别为9.13%和50.84%,锌和铅回收率分别为95.36%和96.57%。 相似文献
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SO2还原浸出过程是赤铁矿法炼锌的重要工序,研究了SO2还原浸出过程中锌、铁、铜、砷、硅等元素的行为。结果显示,在110℃、终酸30g/L的条件下浸出2h,锌浸出率可达95%,并获得一种适合铜铅熔炼的浸出渣。 相似文献
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We have studied the effects of zinc on the 51Cr survival of red blood cells (RBC) from patients with homozygous sickle cell anemia (SCA) using an animal model in which the RBC were transfused into specially prepared rats. The slope (lambdas) of a standard 51Cr RBC survival curve was used as a measure of the rate of RBC sequestration. The effects of intravenous zinc were of considerable therapeutic interest from the standpoint of setting guidelines for effective blood levels of zinc in patients. SCA RBC were transfused into rats whose plasma zinc levels had been raised 3-6 times above normal (300-600 mug/100 ml) by prior iv injection of zinc acetate; in three experiments the mean lambdas in zinc-treated animals breathing 15-16% oxygen was significantly lower (meaning lessened sequestration and greater survival) than saline-treated controls. A possible explanation for the requirement to lower ambient oxygen tension in order to see this zinc effect is discussed. We have further observed an increased mean lambdas for RBC from 10 SCA patients compared to 4 normal controls (0.134 vs 0.030; t = 2.8, p less than 0.01). The lambdas values are quite patient specific (4 patients studied; F = 18.2, P = 0.002). In vitro pretransfusion treatment of SCA RBC with 1.5 mM zinc resulted in a significant increase in hemoglobin oxygen affinity and a marked reduction in lambdas (0.073 vs 0.120; t = 4.5, p less than 0.01). The mean lambdas was not affected by in vitro 0.3 mM zinc treatment; this level did not change hemoglobin oxygen affinity. We conclude that systemic zinc therapy in the animal model described, at plasma levels only slightly higher than those presently obtained in patients, prolongs SCA RBC survival. This animal model is a sensitive measure of the sicklability of SCA RBC and is useful in the testing of in vitro and in vivo antisickling agents. 相似文献