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公开(公告)号：US10124346B2
公开(公告)日：2018-11-13
申请号：US15010196
申请日：2016-01-29
IPC分类号： B03D1/02 , C22B19/02 , C22B19/20 , C22B3/00 , C22B23/00 , C22B1/00 , C22B3/04 , C22B1/14 , C22B11/00 , C22B13/00 , C22B15/00
摘要： This invention relates to a process for recovering valuable metals from ore with significantly reduced water consumption through the discrete treatment and storage of coarse tailings. Ore is ground to produce a coarse particulate ore. The coarse particulate ore is treated in a coarse flotation stage to produce a low grade concentrate fraction and a coarse tailings fraction. The low grade concentrate fraction is treated to produce fine tailings and a saleable concentrate. The coarse tailings are treated separately from the fine tailings and water is recovered from the coarse tailings by hydraulically stacking; filtering or screening, whereafter the coarse tailings are dry stacked, without being recombined with the fine tailings.
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公开(公告)号：US09732399B2
公开(公告)日：2017-08-15
申请号：US13757468
申请日：2013-02-01
申请人： ZincOx Resources PLC
发明人： Antoine Masse
CPC分类号： C22B19/02 , C22B3/0005 , C22B3/0068 , C22B7/007 , C22B7/02 , C22B19/22 , C22B19/30 , Y02P10/234
摘要： A method for producing metal zinc by liquid/liquid extraction, comprising leaching of a zinc-bearing solid raw material containing antimony with a slightly acid aqueous solution, at a pH value maintained above 3 and less than or equal to 5, with formation of a suspension, drawing-off from the suspension of an aqueous phase containing zinc in solution to be subject to the extraction, additional leaching of the remaining suspension with an acid aqueous solution, at a pH value maintained below 3.5 and greater than or equal to 1, with formation of a pulp, introduction of a neutralizing agent in this pulp with coprecipitation of antimony and other impurities and separation from this neutralized pulp of a zinc-bearing aqueous solution which is recycled to the step for leaching the zinc-bearing solid raw material.
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3.发明授权Method for producing a high-purity nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization 有权通过氨脱碳从低品位氧化锌矿石生产高纯度纳米氧化锌的方法公开(公告)号：US09512502B2
公开(公告)日：2016-12-06
申请号：US14430547
申请日：2012-09-25
发明人： Shangquan Chen , Shichun Li , Xiaohong Li
CPC分类号： C22B19/34 , B82Y40/00 , C01G9/02 , C01P2004/64 , C01P2006/12 , C01P2006/80 , C22B3/14 , C22B3/44 , C22B19/02 , C22B19/24 , Y02P10/234
摘要： Disclosed is a method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization. The method comprises: taking ammonia water-ammonium bicarbonate solution as a leaching agent; adding 0.3-0.5 kg sodium fluorosilicate to per cubic meter of the leaching agent; leaching low-grade zinc oxide ore with the leaching agent; and adding 50-60 kg slaked lime to per cubic meter of leached solution to carry out decarburization treatment. The obtained nanometer zinc oxide powder has purity of 99.7% or up, uniform particle size distribution (average particle size of 10-28 nm), specific surface area of 107 m2/g or up, good fluidity and good dispersity. The treatment method of the present invention is low in energy consumption and high in efficiency, and the leaching agent can be recycled. The final leached residue subject to the leaching treatment, without destruction of original mineral component phase composition, can still be used for brick making, so as to achieve dual purposes of economy and environment protection, and has a high economic value and social value.
摘要翻译： 公开了一种通过氨脱碳从低品位氧化锌矿石制备纳米氧化锌的方法。 该方法包括：以氨水 - 碳酸氢铵溶液为浸出剂; 向每立方米浸出剂中加入0.3-0.5kg氟硅酸钠; 浸出低浓度氧化锌矿石; 并向立方米浸出液中加入50-60kg熟石灰进行脱碳处理。 得到的纳米氧化锌粉末的纯度为99.7％以上，粒度分布（平均粒径为10-28nm），比表面积为107m 2 / g以上，流动性好，分散性好。 本发明的处理方法能量消耗低，效率高，浸出剂可循环使用。 经过浸出处理的最终浸出残渣，不破坏原矿物组成相组成，仍可用于制砖，实现经济环保的双重目的，具有较高的经济价值和社会价值。
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公开(公告)号：US20160138130A1
公开(公告)日：2016-05-19
申请号：US14889206
申请日：2014-05-08
发明人： Masaaki IOSAKI , Shuji MORI
CPC分类号： C22B19/26 , C22B7/007 , C22B7/02 , C22B19/02 , C22B19/22 , C22B19/28 , C22B19/30 , C22B19/32 , C25B1/26 , C25C3/34 , C25C7/00 , Y02P10/212
摘要： A zinc production method includes a reaction step such as a leaching step (101) of bringing electric arc furnace dust (1) containing zinc oxide or the like into contact with a chlorine gas (8) to obtain a zinc oxide component in the electric arc furnace dust (1) or the like as crude zinc chloride (3), a purification step (102) of heating the crude zinc chloride (3) obtained at the reaction step to produce zinc chloride vapor, and cooling and condensing the zinc chloride vapor, thereby obtaining purified zinc chloride (6), and an electrolysis step (103) of electrolyzing the purified zinc chloride (6) obtained at the purification step (102) in a molten state to obtain a zinc melt (9) and the chlorine gas (8).
摘要翻译： 锌生产方法包括使含有氧化锌等的电弧炉尘（1）与氯气（8）接触的浸出步骤（101）的反应步骤，以获得电弧中的氧化锌组分 炉渣（1）等作为粗品氯化物（3），在反应步骤中加热粗氯化锌（3）的纯化步骤（102）以产生氯化锌蒸气，并冷却并冷凝氯化锌蒸气 从而得到纯化氯化锌（6）和电解步骤（103），在熔融状态下电解纯化步骤（102）得到的纯化氯化锌（6），得到锌熔体（9）和氯气 （8）。
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公开(公告)号：US08999274B2
公开(公告)日：2015-04-07
申请号：US14237831
申请日：2012-08-08
摘要： A process for treating a mixed sulphidic material containing lead sulphide and at least one other metal sulphide. The process includes the steps of subjecting the mixed sulphidic material to selective oxidation such that lead sulphide in the material is oxidised to form an oxidized lead compound while substantial oxidation of the at least one other metal sulphide is avoided, and separating the oxidized lead compound from the at least one other metal sulphide. The oxidized lead compound may be separated by flotation wherein the oxidized lead compound reports to the tailings and the at least one other metal sulphide reports to the concentrate (froth).
摘要翻译： 一种用于处理含硫化铅和至少一种其它金属硫化物的混合硫化物质的方法。 该方法包括以下步骤：使混合的硫化物材料进行选择性氧化，使得材料中的硫化铅被氧化以形成氧化的铅化合物，同时避免至少一种其它金属硫化物的基本氧化，并将氧化的铅化合物从 所述至少一种其它金属硫化物。 氧化的铅化合物可以通过浮选分离，其中氧化的铅化合物报告尾矿和至少一种其它金属硫化物向浓缩物（泡沫）报告。
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6.发明授权Selective leach recovery of zinc from a composite sulphide ore deposit, tailings, crushed ore or mine sludge 有权从复合硫化物矿床，尾矿，粉碎矿石或矿泥中选择性浸出锌公开(公告)号：US08961911B2
公开(公告)日：2015-02-24
申请号：US13876901
申请日：2011-09-30
申请人： Madhav Dahal
发明人： Madhav Dahal
CPC分类号： C22B19/02 , C22B19/24 , Y02P10/234
摘要： Zinc and lead are usually concomitantly present in Zn—Pb ores and tailings. A novel non-polluting hydrometallurgical process for selectively leaching and recovering zinc (Zn) from a composite lead (Pb) and zinc sulphide containing mineral, crushed untreated rock or unconsolidated mineral particles, mill tailings and/or agglomerated or unagglomerated sulphidic zinc containing waste material without necessitating smelting and refining operation has been developed. A combination of selected oxidant and alkali metal hydroxide has been found effective. A leachant consisting of e.g. a mixture of sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) is employed to selectively dissolve zinc sulphide at high pH at standard temperature and pressure (STP). The kinetics of leaching along with the effect of varying concentration (preferably of sodium hydroxide and sodium hypochlorite) were systematically investigated. Feed ore containing diverse set of minerals e.g. sulphides and carbonates can also be conveniently treated to selectively and almost quantitatively recover zinc as high purity zinc carbonate. This technology can be employed either in-situ or ex-situ based on the amenability of a particular type of mineral deposit or feed ore.
摘要翻译： 锌和铅通常同时存在于Zn-Pb矿石和尾矿中。 一种新型的无污染的湿法冶金方法，用于从复合铅（Pb）和含硫化锌中选择性浸出和回收锌（Zn），含有矿物，破碎的未处理岩石或未固结的矿物颗粒，研磨尾矿和/或聚集或未凝集的含硫化锌的废料 不需要冶炼和精炼操作。 已经发现选择的氧化剂和碱金属氢氧化物的组合是有效的。 浸出液 使用氢氧化钠（NaOH）和次氯酸钠（NaOCl）的混合物在标准温度和压力（STP）下在高pH下选择性溶解硫化锌。 系统地研究了浸出动力学以及不同浓度（优选氢氧化钠和次氯酸钠）的影响。 含有不同组矿物的矿石，如 也可以方便地处理硫化物和碳酸盐以选择性地和几乎定量地回收作为高纯度碳酸锌的锌。 该技术可以基于特定类型的矿物沉积物或饲料矿石的易化性原位或非原位使用。
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公开(公告)号：US06921474B2
公开(公告)日：2005-07-26
申请号：US10814912
申请日：2004-03-31
申请人： Joris Vandenhaute , Eric Robert
发明人： Joris Vandenhaute , Eric Robert
IPC分类号： C22B19/02 , C01G9/04 , C22B1/00 , C22B1/08 , C22B3/44 , C22B19/00 , C22B19/04 , C25C3/34 , C22C3/34
摘要： Process for the production of ZnCl2 from a Zn bearing primary and/or secondary material comprising the steps of reacting the Zn bearing material with a chlorinating agent such as Cl2 to convert metals into chlorides and vaporising the volatile components of the reaction product at a temperature between the melting point of said reaction product and the boiling point of ZnCl2, thereby recovering a Zn rich chlorinated melt, and thereafter distilling ZnCl2 from this Zn rich chlorinated melt, thereby recovering purified ZnCl2 and a Zn-depleted chlorinated melt.
摘要翻译： 从含Zn的初级和/或次级材料生产ZnCl 2的方法，包括使含Zn材料与氯化剂如Cl 2 2反应的步骤，以使 金属成为氯化物，并在反应产物的熔点和ZnCl 2沸点之间的温度下蒸发反应产物的挥发性组分，从而回收富锌的氯化熔体，然后蒸馏出ZnCl 从该富锌的氯化熔体中回收纯化的ZnCl 2和Zn-贫的氯化熔体。
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公开(公告)号：US5858315A
公开(公告)日：1999-01-12
申请号：US591660
申请日：1996-04-24
摘要： A portion of the concentrates is roasted and a portion of the resulting calcine is subjected to a neutral leaching step. Another portion of the concentrates is directly leached in an acidic medium in the presence of oxygen and under atmospheric conditions together with at least a portion of the neutral leaching residue. The zinc- and iron-rich solution resulting from acid leaching is neutralised with another portion of the calcine, the iron is removed and the solution is reused in the neutral leaching step. The method enables a gradual increase in the capacity of an existing zinc plant in accordance with demand, while capital costs may advantageously be spread out over time.
摘要翻译： PCT No.PCT / EP94 / 02794 Sec。 371日期：1996年4月24日 102（e）日期1996年4月24日PCT 1994年8月24日PCT公布。 公开号WO95 / 06140 日期1995年3月2日将浓缩物的一部分焙烧，并将一部分所得的煅烧物进行中性浸出步骤。 浓缩物的另一部分在氧气存在下和酸性介质中直接浸出在大气条件下以及至少一部分中性浸出残渣。 由酸浸出产生的富含锌和铁的溶液被另一部分煅烧物中和，除去铁，并将溶液重新用于中性浸出步骤。 该方法能够根据需求逐渐增加现有锌厂的能力，同时资本成本可以有利地随着时间的推移而扩散。
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公开(公告)号：US4376647A
公开(公告)日：1983-03-15
申请号：US235177
申请日：1981-02-17
申请人： Hong Y. Sohn
发明人： Hong Y. Sohn
CPC分类号： C22B19/02 , C22B1/11 , C22B15/0006 , C22B34/34 , C22B43/00
摘要： A process for removing sulfur from sulfide-bearing ores by reacting water vapor with the sulfide-bearing ore forming hydrogen sulfide while simultaneously regenerating water vapor by reacting the hydrogen sulfide with lime. Advantageously, the process occurs in the absence of a net consumption or production of gaseous species so that the process can be carried out in a closed system with respect to the gaseous species. Sulfide-bearing ores which can be treated using the process of this invention include sulfide-bearing ores of molybdenum, zinc, iron, mercury, and copper. Advantageously, the molybdenum oxide so produced from the sulfide-bearing ore of molybdenum can be reacted further with lime and water producing calcium molybdate and hydrogen. The chalcopyrite form of the sulfide-bearing ore of copper produces bornite and magnetite.
摘要翻译： 通过使水蒸气与形成硫化氢的含硫化物矿石反应，同时通过使硫化氢与石灰反应而再生水蒸气，从含硫矿石矿中除去硫的方法。 有利的是，该过程发生在没有净消耗或生产气态物质的情况下，使得该方法可以在关于气态物质的封闭系统中进行。 可以使用本发明的方法处理的含硫矿石包括含钼，锌，铁，汞和铜的含硫化物矿石。 有利的是，由含硫化物的钼矿产生的氧化钼可进一步与产生钼酸钙和氢的石灰和水反应。 铜的含硫矿物的黄铜矿形式产生斑岩和磁铁矿。
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10.发明授权Method for reclaiming galvanizing quality zinc alloy from continuous galvanizing line top dross 失效从连续镀锌线顶渣回收镀锌质量锌合金的方法
公开(公告)号：US4221591A
公开(公告)日：1980-09-09
申请号：US14127
申请日：1979-02-22
申请人： John C. Hogan , Alan F. Gibson
发明人： John C. Hogan , Alan F. Gibson
CPC分类号： C22B7/04 , C22B19/30 , F27D2099/0008 , Y02P10/212
摘要： Means and a method for reclaiming galvanizing quality zinc alloy from the top dross of a continuous galvanizing line. A dross furnace is provided having front, rear and side walls and a hearth sloping from the rear wall toward the front wall. The front wall is provided with one or more tap holes or a full width slot so sized as to permit the passage of molten zinc alloy therethrough while retaining the resulting sponge or slag. The dross furnace is located with its front wall overhanging the coating pot of the continuous galvanizing line. The dross furnace is maintained at a temperature of from about 460.degree. C. to about 850.degree. C. and is charged with the top dross from the coating pot. The top dross has a residence time in the dross furnace of up to about two hours. The reclaimed galvanizing quality zinc alloy, at yields from about 50% to about 70% based upon the top dross treated, flows directly back into the coating pot. The resulting slag or sponge is removed from the dross furnace which is recharged with top dross.
摘要翻译： 从连续镀锌生产线的顶部渣滓回收镀锌质量锌合金的方法和方法。 炉渣具有前壁，后壁和侧壁以及从后壁向前壁倾斜的炉床。 前壁设置有一个或多个排水孔或全宽度槽，其尺寸适于允许熔融锌合金通过，同时保持所得的海绵或炉渣。 排渣炉的前壁位于连续镀锌生产线的涂层上。 渣槽保持在约460℃至约850℃的温度下，并从涂覆罐中装入顶部渣滓。 顶部渣滓在渣滓炉中停留时间长达约2小时。 回收镀锌质量的锌合金以处理的顶渣为基准的约50％至约70％的产率直接返回到涂覆罐中。 将所得到的炉渣或海绵从与顶渣混合的炉渣中除去。
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