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1.发明授权Increased reduction of magnesium content by use of inorganic promoters during beneficiation of phosphate ores by flotation 失效通过浮选对磷酸盐矿选矿时，通过使用无机促进剂来增加镁含量的降低
公开(公告)号：US4747941A
公开(公告)日：1988-05-31
申请号：US940528
申请日：1986-12-10
CPC分类号： B03D1/06 , B03D1/002 , B03D1/008 , B03D1/021 , B03D2201/02 , B03D2201/06 , B03D2203/06
摘要： A process for beneficiating phosphate containing ores, wherein promoter reagents are added to the ore slurry prior to the addition of collectors and depressants for flotation of the carbonate and silica components. The promoters aid in increasing the rejection of the magnesium present during carbonate and silica flotation steps and recovery of phosphates, so that acceptably low magnesium levels for phosphoric acid production can be achieved in a phosphate concentrate in a single rougher stage. Preferred promoters include sodium carbonate and ammonium hydroxide.
摘要翻译： 一种用于选择含磷矿石的方法，其中在添加用于浮选碳酸盐和二氧化硅组分的收集剂和抑制剂之前，将催化剂试剂加入到矿浆中。 助催化剂有助于增加碳酸盐和二氧化硅浮选步骤中镁存在的排斥反应并回收磷酸盐，从而可以在单一粗化阶段的磷酸盐浓缩物中实现磷酸生产的可接受的低镁含量。 优选的助催化剂包括碳酸钠和氢氧化铵。
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公开(公告)号：US4511541A
公开(公告)日：1985-04-16
申请号：US446362
申请日：1982-12-02
CPC分类号： C22B3/0064 , C01G11/003 , C01G39/003 , C01G53/003 , C01G9/003 , C22B3/007 , Y02P10/234
摘要： A process for the selective recovery of cadmium, molybdenum, zinc, nickel and other metal values from wet process phosphoric acid and other acidic to slightly basic carrier solutions, wherein the metal-bearing solution is contacted with an organophosphene extractant to precipitate the metal values for subsequent separation from the solution. Separation may be effected by mechanical means or by scrubbing with a water-immiscible organic solvent such as kerosene for subsequent recovery of the metal values. The metal specie recovered is determined by the concentration of the organophosphene, which may be selectively adjusted to recover a series of metal values in a sequence of stages.
摘要翻译： 从湿法磷酸和其他酸性至微碱性载体溶液中选择性回收镉，钼，锌，镍和其他金属值的方法，其中使含金属溶液与有机膦萃取剂接触以沉淀金属值 随后与溶液分离。 分离可以通过机械方法进行或通过与水不混溶的有机溶剂如煤油洗涤以随后回收金属值。 回收的金属物质可以通过有机聚合物的浓度来确定，有机聚合物的浓度可以选择性地调整，以便在一个阶段中回收一系列的金属值。
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公开(公告)号：US4836854A
公开(公告)日：1989-06-06
申请号：US625443
申请日：1984-06-27
IPC分类号： C04B12/02
CPC分类号： C04B12/02
摘要： A process and product for achieving uniform, stabilized working and setting times for phosphate-bonded magnesia cements, wherein a solid phosphate is mixed with an aqueous ammonium phosphate solution and magnesium oxide to form a cement. The solid phosphate may be provided dry or in a slurry, and may be first mixed with the ammonium phosphate solution or the magnesium oxide. Introduction of the solid phosphate into the cement stabilizes the setting time of the cement, which otherwise may vary from a few minutes to several hours, depending upon the characteristics of the ammonium phosphate solution. The ammonium phosphate solution may be supplied as a 10-34-0 composition that is readily available commercially. In one embodiment of the invention, the solid phosphate is provided as an ammonium phosphate mixture of an 18-46-0 composition, having an ammonium phosphate content above the solubility limit of ammonium phosphate in water. In another embodiment, dry phosphate is mixed with the magnesium oxide, before the ammonium phosphate solution is added.
摘要翻译： 用于实现磷酸盐键合氧化镁水泥的均匀，稳定的工作和凝固时间的方法和产品，其中固体磷酸盐与磷酸铵水溶液和氧化镁混合以形成水泥。 固体磷酸盐可以干燥或以浆料形式提供，并且可以首先与磷酸铵溶液或氧化镁混合。 将固体磷酸盐引入水泥稳定了水泥的凝固时间，这取决于磷酸铵溶液的特性，其可以从几分钟到几小时变化。 磷酸铵溶液可以作为市售的容易获得的10-34-0组合物提供。 在本发明的一个实施方案中，固体磷酸盐作为18-46-0组合物的磷酸铵混合物提供，其中磷酸铵含量高于磷酸铵在水中的溶解度极限。 在另一个实施方案中，在加入磷酸铵溶液之前，将干磷酸盐与氧化镁混合。
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公开(公告)号：US4883586A
公开(公告)日：1989-11-28
申请号：US208170
申请日：1988-06-16
摘要： Ores containing mineral values are separated into two slurries, one having primarily fine particles and gangue and the other having primarily coarse particles. The slurry having fine particles and gangue is adjusted to a solids content of less than about 15 percent, as necessary, and then conditioned by the addition of appropriate promoter reagents, a flotation collector, and a froth modifier. The gangue, containing a disproportionate share of impurities, is floated in a column flotation cell wherein the fine particulates are not mechanically agitated, and removed. The remaining fine particulate underflow, containing a disproportionate share of the minearl values, is then processed directly, or combined with the slurry containing the coarse particulate to yield a flow having reduced impurity content and increased recovery of the mineral values.
摘要翻译： 含有矿物质的矿石被分成两个浆料，一个具有主要的细颗粒和脉石，另一个具有主要的粗颗粒。 根据需要，将具有细颗粒和脉石的浆料调节至小于约15％的固体含量，然后通过加入合适的助催化剂，浮选收集器和泡沫改性剂进行调理。 含有不相称的杂质份额的g石漂浮在柱浮选池中，其中细颗粒不被机械搅拌和除去。 然后，将含有不相称份数的矿砂值的剩余的细颗粒下溢直接加工，或与含有粗颗粒的浆料混合，产生杂质含量降低且矿物质回收率提高的流程。
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5.发明授权
公开(公告)号：US4461746A
公开(公告)日：1984-07-24
申请号：US349026
申请日：1982-02-16
CPC分类号： C01G43/00 , C22B60/0282
摘要： A two stage reductive stripping process for recovering uranium from wet process phosphoric acid, wherein the ferrous ions required for the first-stage reductive strip are supplied by heating a portion of acid raffinate phosphoric acid from the first-stage extraction in the presence of pressurized hydrogen gas. The pressurized hydrogen gas reduces the ferric ions in the raffinate to the ferrous state without any addition of metallic iron or other impurity, so that the uranium-enhanced reductive strip solution supplied to the second stage from the first stage reductive strip has a low concentration of iron impurity, and no further purification to remove iron impurity is required.
摘要翻译： 用于从湿法磷酸中回收铀的二级还原脱除方法，其中第一级还原带所需的亚铁离子通过在加压氢气存在下从第一阶段萃取中加热一部分酸性残液磷酸而得到 加油站。 加压氢气将提余液中的铁离子还原成亚铁状态，而不会添加金属铁或其他杂质，使得从第一级还原带供应到第二级的铀增强还原带溶液的浓度低 铁杂质，并且不需要进一步纯化以除去铁杂质。
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公开(公告)号：US4877594A
公开(公告)日：1989-10-31
申请号：US283560
申请日：1988-12-13
IPC分类号： C01B25/46
CPC分类号： C01B25/461 , C01B25/462
摘要： A mixture of hydrophobic and hydrophilic extractants is used to separate phosphate values from impurities found in phosphoric acid. In one approach, impurities are removed from phosphoric acid and the phosphate values are recovered, by introducing polyphosphates and ammonium ions into the impure acid, and contacting the impure acid with a mixture of low and high molecular weight alcohols, one of which is hydrophilic and the other hydrophobic, in a single stage. The phosphate values segregate to the high molecular weight alcohol fraction, and the impurities segregate to the low molecular weight alcohol fraction. After separation of the alcohol solutions, the phosphate values and the impurities are separated from their respective extractant solutions, and the alcohols recirculated. Polyphosphates and ammonia are preferably provided by reacting a portion of the original feed acid with ammonia at elevated temperature in a pipe reactor.
摘要翻译： 使用疏水和亲水萃取剂的混合物将磷酸盐与在磷酸中发现的杂质分离。 在一种方法中，从磷酸中除去杂质，通过将多磷酸盐和铵离子引入不纯的酸中并将不纯的酸与低分子量和高分子量醇的混合物接触，其中一种是亲水的和 另一个疏水，在一个阶段。 磷酸盐分离成高分子量醇馏分，杂质分离成低分子量醇馏分。 在分离醇溶液后，将磷酸盐值和杂质从它们各自的萃取剂溶液中分离出来，醇再循环。 聚磷酸盐和氨优选通过使一部分原始进料酸与氨在升高的温度下在管式反应器中反应来提供。
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公开(公告)号：US4816241A
公开(公告)日：1989-03-28
申请号：US465021
申请日：1983-02-14
CPC分类号： C22B60/0282 , C01G43/00
摘要： A process for reducing the valence state of ferrous and other ions present in phosphoric acid by heating the acid in the presence of a pressurized reducing gas, preferably hydrogen. The pressurized gas reduces the ions without an addition of metallic iron or other impurity. This process is desirably used with processes for recovering uranium from wet process phosphoric acid, wherein ferric or uranyl ions in the phosphoric acid are reduced in a pressurized reducing gas.
摘要翻译： 一种通过在加压还原气体，优选氢气存在下加热酸来降低存在于磷酸中的亚铁和其它离子的价态的方法。 加压气体减少离子而不加入金属铁或其他杂质。 该方法理想地用于从湿法磷酸回收铀的方法，其中在加压还原气体中磷酸中的三价铁或铀酰离子被还原。
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公开(公告)号：US4554004A
公开(公告)日：1985-11-19
申请号：US543488
申请日：1983-10-19
CPC分类号： C05G3/0058 , C05C3/005
摘要： A process for preparing granulated fertilizer materials, wherein urea phosphate is used as a granulating agent to assist in the agglomeration of finely divided solid particles into relatively uniformly sized granules. Urea phosphate, prepared by dissolving urea in phosphoric acid, is coated onto finely divided particles of fertilizer materials, and granulation is accomplished at a temperature within the thermoplastic range of the urea phosphate, wherein the urea phosphate plasticizes and induces adherence of the fine particles into relatively uniformly sized granules. Optionally, ammonia gas, clay, or micro nutrients may be added after granulation.
摘要翻译： 制备颗粒肥料的方法，其中使用磷酸尿素作为造粒剂，以帮助将细分散的固体颗粒聚集成相对均匀的颗粒。 通过将尿素溶解在磷酸中制备的磷酸尿素被涂覆在细碎的肥料颗粒上，在尿素磷酸盐的热塑性范围内的温度下进行造粒，其中磷酸尿素增塑并诱导细颗粒的粘附 颗粒尺寸相对均匀。 任选地，在造粒后可以加入氨气，粘土或微量营养物质。
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公开(公告)号：US4447403A
公开(公告)日：1984-05-08
申请号：US72304
申请日：1979-09-04
申请人： Laurence W. Bierman , Gary L. Long , David Bortner
发明人： Laurence W. Bierman , Gary L. Long , David Bortner
CPC分类号： C22B60/0282 , C01B25/238 , C01G31/00 , C01G43/00 , C01G49/00 , C21B15/00 , C22B34/22
摘要： An improved method and apparatus for effecting a substantial reduction in retention time of oxidation processes by the autoclave oxidation of ion species dissolved in aqueous solutions. In one embodiment, the invention provides for oxidation of dissolved reduced ion species including ferrous iron (Fe.sup.+2), uranium (U.sup.+4) and vanadium (V.sup.+3) from wet process phosphoric acids, or for conditioning of aqueous solutions for other uses, such as corrosion control, by raising the valence state of dissolved ion species. In accordance with the present invention, pure oxygen, present in quantity of at least 94% by volume, is utilized as an oxidizing agent with specified process parameters: temperature, pressure and mixing conditions in an autoclave reaction vessel. In a presently preferred embodiment, the following specified parameters have achieved optimum results with regard to a significant decrease of retention time of the aqueous solution treated in the autoclave vessel: temperature range of from about 120.degree. F. to about 160.degree. F., pressure range of from about 120 psi to about 150 psi and effecting agitation by the use of an impeller located near the interface of the liquid and gas mixture in the vessel to provide a dispersion of the liquid solution in the gaseous phase. In accordance with such embodiment, a reduction of retention time for oxidation of uranium (U.sup.+4 .fwdarw.U.sup.+6) and vandanium (V.sup.+3 .fwdarw.V.sup.+4) metals from wet process phosphoric acid has been found to be less than two minutes, whereas, prior processes for effecting the same oxidation results have taken at least one hour.
摘要翻译： 一种改进的方法和装置，用于通过溶解在水溶液中的离子物质的高压釜氧化来显着降低氧化过程的保留时间。 在一个实施方案中，本发明提供了从湿法磷酸氧化溶解的还原离子物质，包括二价铁（Fe + 2），铀（U + 4）和钒（V + 3），或用于调节其它水溶液 通过提高溶解离子物质的化合价态来应用腐蚀控制。 根据本发明，使用存在量为至少94体积％的纯氧作为氧化剂，其具有指定的工艺参数：高压釜反应容器中的温度，压力和混合条件。 在目前优选的实施方案中，以下指定参数已经获得了在高压釜容器中处理的水溶液的保留时间的显着降低的最佳结果：温度范围为约120°F至约160°F，压力 范围为约120psi至约150psi，并通过使用位于容器中的液体和气体混合物的界面附近的叶轮进行搅拌，以提供液体溶液在气相中的分散体。 根据这种实施方案，已经发现，从湿法磷酸中氧化铀（U + 4-> U + 6）和铀（V + 3→V + 4）金属的保留时间的减少已经被发现小于 两分钟，而用于实现相同氧化结果的现有方法至少需要1小时。
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