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1. 发明申请

US20120164041A1 Stabilization of Arsenic-Containing Wastes Generated During Treatment of Sulfide Ores 审中-公开
标题翻译：稳定硫化矿石处理过程中产生的含砷废物
公开(公告)号：US20120164041A1
公开(公告)日：2012-06-28
申请号：US13075291
申请日：2011-03-30
申请人： Jay Charles Smith
发明人： Jay Charles Smith
IPC分类号： C01G28/02
CPC分类号： C01G28/02
摘要： A method is provided for the efficient stabilization, removal and disposal of arsenic-containing wastes generated in metal recovery processes that employ roasting techniques and the like. The conversion of the mostly trivalent arsenite compounds in the wastes to mostly pentavalent solid arsenate precipitates is accomplished by mixing the wastes with water and a ground iron-containing mineral, such as goethite, to form an aqueous slurry of wastes and ground iron-containing mineral, acidifying the slurry to a pH of less than about 1.0, treating the acidified slurry with oxygen gas in a pressurized vessel at a temperature higher than about 120° C. and providing an oxidation catalyst comprised of a water-soluble nitrate and a water-soluble iodide. The overall efficiency of the controlling chemical reactions is improved by the addition and use of the catalyst. The resulting solid arsenate precipitates, in the form of scorodite, are ideally suited for safe disposal with minimum or no further treatment. Unconverted soluble trivalent arsenic compounds remaining in solution may be converted and precipitated as additional scorodite by mixing and agitating the slurry with soluble iron salts under controlled conditions. The resulting precipitates meet or exceed environmental requirements for impoundment and safe disposal.
摘要翻译：提供了一种用于有效地稳定，去除和处理在采用焙烧技术等的金属回收方法中产生的含砷废物的方法。将废弃物中大部分三价砷化物化合物转化为大部分五价固体砷酸盐沉淀物是通过将废物与水和研磨的含铁矿物如针铁矿混合形成废物和含铁矿物矿物的含水浆料而实现的，将浆料酸化至小于约1.0的pH，在高于约120℃的温度下在加压容器中用氧气处理酸化的浆料，并提供由水溶性硝酸盐和水溶性硝酸盐组成的氧化催化剂，可溶性碘化物。通过添加和使用催化剂可以改善控制化学反应的总体效率。所得到的固体砷酸盐以臭葱石的形式沉淀，理想地适用于最少或无需进一步处理的安全处理。保留在溶液中的未转化的可溶三价砷化合物可以通过在可控制的条件下混合和搅拌可溶性铁盐而将其转化并沉淀为另外的臭氧石。所得沉淀物达到或超过蓄水和安全处置的环境要求。

2. 发明授权

US06334991B1 Purification of sulfur by means of centrifugation 失效
标题翻译：通过离心法纯化硫
公开(公告)号：US06334991B1
公开(公告)日：2002-01-01
申请号：US09560620
申请日：2000-04-28
申请人： Robin Whitney Strickland , Jay Charles Smith
发明人： Robin Whitney Strickland , Jay Charles Smith
IPC分类号： C01B1702
CPC分类号： C01B17/0232
摘要： A sulfur purification process is provided. Ash-containing molten sulfur is fed to a centrifuge and subjected to centrifugation under controlled conditions at G forces at least about 4,000 times that of gravity. The centrifugation generates a purified sulfur product and a high-solids sulfur waste stream. A solid bowl disc centrifuge provided with conical discs is used to effect the centrifugal separation of solids from liquids at G forces of at least about 4,000. The centrifuge and related piping system are equipped with heating means so as to maintain the temperature of the sulfur above about 250° F. If large volumes of sulfur are to be treated, e.g., 40 or more long tons per hour, a pretreatment step, where the molten sulfur is first subjected to centrifugation at G forces at least about 4,000 times that of gravity in one or more nozzle bowl centrifuges, is added in order to obtain satisfactory results. In another aspect of the sulfur purification process, the nozzle bowl centrifuge underflow waste stream is further processed in a cyclone-thickener arrangement to obtain a high-solids sulfur waste stream and a moderate-solids sulfur stream which is then mixed with the low-solids sulfur product stream from the nozzle bowl centrifuge(s), or recycled to the feed of the nozzle bowl centrifuge(s).
摘要翻译：提供硫的净化方法。将含灰分的熔融硫进料到离心机中，并在受控条件下在G力下离心至少约4000倍重力。离心产生纯化的硫产物和高固体含硫废物流。设置有锥形盘的固体碗盘式离心机用于在至少约4,000的G力下使固体与液体离心分离。离心机和相关管道系统配备有加热装置，以将硫的温度保持在约250°F以上。如果要处理大量的硫，例如每小时40吨或更长吨，则预处理步骤，其中熔融硫首先在G力下进行离心，在一个或多个喷嘴碗式离心机中至少约4000倍的重力，以获得令人满意的结果。在硫净化方法的另一方面，将喷嘴碗离心机底流废物流以旋风 - 增稠器排列进一步处理，以获得高固体硫废物流和中等固体硫流，然后将其与低固体来自喷嘴碗离心机的硫产物流，或再循环到喷嘴碗离心机的进料。

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