硫酸烧渣再回收铁试验研究

通过对硫酸烧渣试验研究,确定磁选 浮选的工艺流程回收硫酸烧渣中的铁和硫等元素,取得了较好的技术指标.     

硫酸烧渣的综合利用研究

采用盐酸-氯化钠体系对硫酸烧渣中的有价金属进行浸出了探索性浸出试验研究,并对浸出脱硫效果进行了跟踪研究。根据正交试验的结果分析,得到了Pb、Zn和Ag金属浸出和脱硫的最优化条件。对最优条件下的试验结果进行估算,同时对该最佳条件进行了验证性实验。验证实验所得的Pb、Zn和Ag金属的浸出率和脱硫率与估算结果吻合良好。     

从铅渣中回收铟的试验研究

本文研究从含铟铅渣中回收铟,确定了含铟铅渣硫酸化焙烧的最佳条件,提高铟的回收率,也提高了铅渣的质量。     

氯浸法从硫酸烧渣中提取黄金新工艺

以金精矿氰化尾矿为原料的硫酸厂每年产生大量的含金硫酸烧渣, 由于金含量低、回收率低、处理成本高, 目前仅以很低的价格卖给水泥厂做熟料, 大量的黄金白白流失。     

某硫酸厂硫酸烧渣焙烧磁选的试验研究

硫酸烧渣综合回收铁国内研究多有报道,以浮选为主,但难控制,产品质量波动较大。试验室硫酸烧渣焙烧磁选的研究,认为流程简单,铁精矿质量稳定,易于控制。     

铅渣中铅的湿法高效回收工艺研究

以氧化锌烟尘浸出所得铅渣为原料,开发了"氯化浸出—锌片置换铅—置换后液中和沉锌"综合处理工艺,重点考察了药剂浓度、液固比、温度等条件对氯化浸出的影响,并开展了浸出液置换沉铅和中和沉锌探索试验。结果表明,优化的氯化浸出条件为:液固比30 mL/g、温度80℃、NaCl浓度320 g/L、CaCl₂浓度15 g/L、浸出时间2 h,铅、锌和银的浸出率分别为98.30%、81.77%和29.47%;浸出液在60℃下采用锌片置换沉铅,所得海绵铅纯度为92.09%,铅总回收率达95%以上。工艺可取得一定经济和社会效益,并为含铅锌固废的处理提供借鉴。     

某硫酸烧渣干法铁红改性试验研究

文章通过对某硫酸烧渣干法铁红与湿法铁红性质的对比研究,介绍了该干法铁红通过湿法机械力化学改性等工艺,该铁红的颜色、悬浮性等性能得到了较好的改善。     

关于硫酸烧渣的利用及建议

通过对国外及我国目前制酸、炼铁行业的基本情况介绍，针对我国的实际情况提出在选太过程中应将硫精矿的品位提高到４６％以上，从而使制酸烧渣的ＴＦｅ含量大于６０％，以达到硫、铁双资源的利用；并且可以大大的改善环境条件。     

硫酸烧渣提铁降硫工艺试验研究

对某化工厂黄铁矿制酸烧渣的工艺矿物学性质进行检测分析,确定采用筛分水洗—溜槽重选—浮选脱硫选矿工艺流程,从烧渣中分选获得了铁品位为65.29%,铁回收率为83.74%,硅、硫含量分别为4.89%、0.15%的高品质铁精矿产品。     

硫酸法处理高钛渣制取硫酸氧钛

高钛渣主要用于生产钛白粉或钛合金,用于制备硫酸氧钛这种中间产物的研究较少.采用硫酸法处理高钛渣制备硫酸氧钛,为高钛渣的资源化利用提供一种新途径.热力学计算发现,高钛渣与浓硫酸反应一步转型成硫酸氧钛可行,加热温度不宜过高,以避免浓硫酸热解带来的成本和环境污染问题.单因素实验表明,在温度350℃、时间150 min、液固体...     

含金硫酸渣硫酸盐化焙烧—氯盐浸出试验研究

针对难处理含金硫酸渣进行了硫酸盐化焙烧—氯盐浸出试验研究,考察了硫酸体积分数、硫酸用量、焙烧温度、焙烧时间、焙烧促进剂用量对焙烧效果的影响,以及氯酸钠用量、氯化钠用量、浸出温度、液固比、浸出时间对浸出效果的影响。试验结果表明:在硫酸用量为1.6 t/t渣,硫酸溶液体积分数为60%,焙烧温度为500℃,焙烧添加剂RS-1用量为50 kg/t,焙烧时间为80 min时,焙烧效果最好;在NaClO_3用量为100 kg/t,Na Cl用量为70 kg/t,浸出温度为80℃,液固比为3.5∶1,浸出时间为3 h时,浸出效果最佳;其最终试验得到浸渣中金品位为1.80 g/t,浸出率为95.01%。     

The settling of metallic lead from lead blast furnace slag

As a consequence of inadequate working methods, excessive losses of lead can occur in the slags of lead blast furnaces. The settling of metallic lead from a slag containing 20.5 pct SiO₂, 33.4 pct FeO, 16.8 pct CaO, 12.4 pct ZnO, 0.9 pct S, and 6.1 pct Pb has been studied as a function of the temperature (1200 to 1300 °C), composition (addition of CaO, ZnO, and Fe), and time (up to 2 hours). Under these conditions sufficient, although not total, sedimentation of the metal retained is achieved. The best conditions were obtained at 1260 °C with no modification to the composition of the slag. The settled lead was visible macroscopically in a section of the lower part of the melts.     

活性炭吸附-差示脉冲阳极溶出伏安法测定硫酸渣提取液中痕量铊

研究了活性炭吸附-差示脉冲阳极溶出伏安法测定复杂基体(二种硫酸渣逐级提取液)中痕量铊的方法。讨论了伏安图的形成、测定底液和pH值的选择,研究了直接测定和分离测定(分离方式选择、有机物去除)的相态和方法。结果表明:炉底渣和沉灰渣的水相、粘土相和铁锰相提取液中的铊均可直接测定,炉底渣和沉灰渣有机相、碳酸盐相、硫化物相和硅酸盐相提取液中的铊用活性炭吸附分离,并用50~60℃50 g/L的(NH4)2C2O4解吸,去除有机物后也可测定。本方法检出限为0.5μg/L,千倍浓度的9种阳离子共存或万倍浓度的8种阳离子单     

Recovery of rare earths and aluminum from FCC waste slag by acid leaching and selective precipitation

This paper investigated the recovery of rare earth elements(REEs) and aluminum(AI) from the waste slag discharged by FCC catalyst factory(FCC waste slag) via acid leaching and selective precipitation.Analysis methods such as ICP-AES, XRF and XRD were applied to obtain experiment data. The maximum leaching efficiency of REEs and Al was achieved at pH value of 1 and with liquid to solid ratio of 4:1,Under such conditions, 91.01%, 92.24% and 94.77% of La, Ce and Al were extracted at 20 ℃ for 2 h from the FCC waste slag, respectively. The SiO_2 content in the leaching residue was 88.3%, which can be used as an available silicon resource. The REEs can be precipitated in the form of REEs and sodium double sulfate(NaRE(SO_4)_2·xH_2 O) by adding Na_2 SO_4 to the leaching solution, while Al remained in the solution. Afterwards, the pH value of the filtrate was adjusted to 4.5, and Al was precipitated as AI(OH)_3. Finally,NaRE(SO_4)_2·xH_2 O and Al(OH)_3 were converted into RECl_3 and Al_2(SO4)_3 solution,respectively, which were recycled to manufacture zeolite. This process recovered REEs and Al from the FCC waste slag and reduced the emissions of waste slag simultaneously, which has an important economic and environment significance.     

炼铅炉渣富氧煤粉烟化的生产实践

叙述了富氧煤粉烟化的生产实践,分析了堞粉消耗居高不下的原因.     

金精矿氰化尾渣铅和铜的回收

采用优先浮选铅、再活化浮选铜的工艺流程对某金精矿氰化尾渣铅、铜回收进行研究.闭路实验表明:石灰作抑制剂,乙硫氮(二乙基二硫代氨基甲酸钠)和丁基黄药(丁基黄原酸钠)作捕收剂,通过\     

从酸浸渣中综合回收金银铁铅的试验研究

对从酸浸渣中综合回收金银铁铅进行了试验研究.试验结果表明,采用试验确定的工艺方法,不但可回收酸浸渣中铁铅,还可提高金银的氰化浸出率,分别可达98 %和70 %以上,能获得较好的经济效益和社会效益.     

Recovery of cobalt,nickel and copper from converter slag through roasting with ammonium sulphate and sulphuric acid

Roasting of copper converter slag containing 4.03% copper, 1.98% nickel and 0.48% cobalt with ammonium sulphate open to atmosphere has been carried out in order to achieve sulphation of copper, nickel and cobalt followed by leaching of the metal values as soluble sulphates with water. The effect of parameters such as temperature (200–600°C), time (15–120 min), and amount of ammonium sulphate (0.5–2.5 times stoichiometric) has been studied. Under atmospheric conditions, using 2.5 times the stoichiometric requirement of ammonium sulphate, the recovery of copper, nickel and cobalt was found to be 85%, 81% and 85%, respectively. Similar studies were carried out with sulphuric acid. The influence of experimental variables such as the amount of sulphuric acid (0.25–2 times stoichiometric), roasting temperature (100–300°C) and time (15–120 min) has been studied. Under optimum conditions, i.e., at 150°C and a roasting time of 60 min with the stoichiometric amount of sulphuric acid, recoveries of copper, nickel and cobalt were 95, 90 and 99%, respectively, along with a contamination of 60–80% iron. Removal of most of the iron from the leach liquors has been effected with ammonia liquor and lime as precipitants. A two-stage roasting operation using sulphuric acid, first at 150°C and then at 650°C, has resulted in bringing the iron content down to about 3% in the sulphation product without much affecting the recovery of other metal values.     

钢渣的回收与利用

介绍钢渣冷却处理，从钢渣中回收金属的工艺流程，渣钢的循环使用及渣钢的其他用途，为钢铁企业回收和利用钢渣，提供参考。