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1. 发明授权

US5893463A Recovering precious metals and small precious stones from clay suspensions 失效
标题翻译：从粘土悬浮液中回收贵金属和小宝石
公开(公告)号：US5893463A
公开(公告)日：1999-04-13
申请号：US838208
申请日：1997-04-16
申请人： David Krofchak , Peter A.C.A. Howe , David M. Howe
发明人： David Krofchak , Peter A.C.A. Howe , David M. Howe
IPC分类号： B03B1/00 , B03B1/04 , B03B5/28 , B03D3/06
CPC分类号： B03D3/06 , B03B1/04 , B03B5/28 , C22B11/04 , Y10S209/902
摘要： A process for recovering precious metal particles or small precious stones from aqueous clay suspensions containing said precious metal particles or precious stones in suspension with clay particles includes adding a sufficient amount of deflocculating agent to cause deflocculation of the clay particles, and allowing the deflocculated suspension to settle. The settled material containing the precious metal particles or small precious stones is then removed.
摘要翻译：从含有粘土颗粒悬浮的贵重金属颗粒或宝石的含水粘土悬浮液中回收贵金属颗粒或小宝石的方法包括加入足量的抗絮凝剂引起粘土颗粒的絮凝，并使抗絮凝悬浮液解决。然后取出含有贵重金属颗粒或小宝石的沉淀物。

2. 发明授权

US6026965A Process for recovering mineral particles, metal particles or small precious stones from an aqueous slim associated with an ore body or mineral deposit or processing thereof 失效
标题翻译：从与矿体或矿物沉积物相关的水性苗条或其处理中回收矿物颗粒，金属颗粒或小宝石的方法
公开(公告)号：US6026965A
公开(公告)日：2000-02-22
申请号：US275976
申请日：1999-03-25
申请人： Roberto Berardi , David Krofchak , Peter A. C. A. Howe , David M. Howe
发明人： Roberto Berardi , David Krofchak , Peter A. C. A. Howe , David M. Howe
IPC分类号： B03B1/00 , B03B1/04 , B03B5/28 , B03D3/06
CPC分类号： B03B1/04 , B03B5/28 , B03D3/06 , C22B11/04 , Y10S209/902
摘要： A process for recovering mineral particles, metal particles or small precious stones from an aqueous slime associated with an ore body or mineral deposit or processing thereof, said aqueous slime containing mineral particles, metal particles or small precious stones in suspension with slime particles. The process includes adding a sufficient amount of deflocculating agent to the aqueous slime to cause deflocculation of the slime particles and produce a deflocculated suspension containing the mineral particles, metal particles or small precious stones. The deflocculated suspension is allowed to settle, and the settled material containing the mineral particles, metal particles or small precious stones is recovered.
摘要翻译：从与矿体或矿物沉积物或其加工物相关的水性粘土中回收矿物颗粒，金属颗粒或小宝石的方法，所述含水泥液含有矿物颗粒，金属颗粒或与粘泥颗粒悬浮的小宝石。该方法包括向含水泥液中加入足够量的抗絮凝剂以引起粘泥颗粒的絮凝，并产生含有矿物颗粒，金属颗粒或小宝石的抗絮凝悬浮液。使絮凝的悬浮液沉降，并回收含有矿物颗粒，金属颗粒或小宝石的沉降物质。

3. 发明授权

US5968258A Method of making cement from base metal smelter slag 失效
标题翻译：从贱金属冶炼渣生产水泥的方法
公开(公告)号：US5968258A
公开(公告)日：1999-10-19
申请号：US74794
申请日：1998-05-08
申请人： David Krofchak
发明人： David Krofchak
IPC分类号： C04B7/21 , C04B18/14 , C04B28/02 , C22B7/04 , C04B7/147 , C04B7/153 , C04B7/19
CPC分类号： C04B7/21 , C04B18/144 , C04B28/02 , C04B5/06 , C04B7/147 , C04B7/19 , C21B3/04 , C21B3/06 , C22B7/04 , Y02P10/212 , Y02P40/143 , Y02W30/542 , Y02W30/543 , Y02W30/94
摘要： A method of making cement from base metal smelter slag produced by a nickel, copper, lead or zinc smelter, includes crushing the slag with a source of calcium sulphate to a size of less than about 1/4 inch and heating the mixture to produce a cement, and grinding the cement to a size in the range of from about -250 to about 425 mesh.
摘要翻译：一种由镍，铜，铅或锌冶炼厂生产的贱金属冶炼炉渣生产水泥的方法包括用硫酸钙源将炉渣粉碎至小于约+ E，1/4 + EE英寸的尺寸，加热混合物以产生水泥，并将水泥研磨至约-250至约425目的范围内的尺寸。

4. 发明授权

US5749962A Method of making cement from base metal smelter slag 失效
标题翻译：从贱金属冶炼渣生产水泥的方法
公开(公告)号：US5749962A
公开(公告)日：1998-05-12
申请号：US756861
申请日：1996-11-26
申请人： David Krofchak
发明人： David Krofchak
IPC分类号： C04B5/06 , C04B7/147 , C04B7/19 , C04B18/14 , C04B28/02 , C21B3/04 , C21B3/06 , C22B7/04 , C04B7/153
CPC分类号： C04B28/02 , C04B18/144 , C04B5/06 , C04B7/147 , C04B7/19 , C21B3/04 , C21B3/06 , C22B7/04 , Y02P10/212 , Y02P40/143 , Y02W30/542 , Y02W30/543 , Y02W30/94
摘要： Cement is made from base metal smelter slag produced by a nickel, copper, lead or zinc smelter. The slag is ground to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, and the ground slag cement is mixed with Type 3 high early strength Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.
摘要翻译：水泥由镍，铜，铅或锌冶炼厂生产的贱金属冶炼炉渣制成。将矿渣研磨至约-250至约425目的范围内的大小，以产生研磨渣水泥，并将地渣水泥与3型高强度硅酸盐水泥以至少约0.5：1的比例混合，以生产混合水泥。

5. 发明授权

US5865872A Method of recovering metals and producing a secondary slag from base metal smelter slag 失效
标题翻译：从金属冶炼炉渣中回收金属和生产二次炉渣的方法
公开(公告)号：US5865872A
公开(公告)日：1999-02-02
申请号：US815508
申请日：1997-03-12
申请人： David Krofchak , Werner Dresler
发明人： David Krofchak , Werner Dresler
IPC分类号： C04B5/06 , C04B7/147 , C04B7/19 , C04B18/14 , C04B28/02 , C21B3/04 , C21B3/06 , C22B7/04 , C22B5/04 , C21B15/02
CPC分类号： C04B7/147 , C04B18/144 , C04B5/06 , C04B7/19 , C21B3/04 , C21B3/06 , C22B7/04 , Y02P10/212 , Y02P40/143 , Y02W30/542 , Y02W30/543 , Y02W30/94 , Y10S75/959
摘要： A method of recovering metals and producing a secondary slag from base metal smelter slag produced by a copper or nickel smelter includes mixing the smelter slag with at least one reducing agent selected from the group consisting of carbon, calcium carbide, ferrosilicon and aluminum, said carbon and calcium carbide (if present) being from about 1% to about 40% by weight of the slag and said aluminum (if present) being from about 2% to about 35% by weight of the slag and with from zero to about 70% calcium oxide by weight of the slag, heating the mixture aluminothermically if Al is present as reducing agent above the melting point to reduce the smelter slag to a metal alloy containing iron and possibly silicon and aluminum, depending on the quantity of aluminum added to the smelter slag, and heavy metals such as copper, nickel and cobalt which were in the smelter slag and thereby also producing a secondary slag containing at least one compound selected from the group consisting of calcium silicate, calcium aluminate, fused alumina and calcium iron aluminum silicate, and separating the metal alloy from the secondary slag.
摘要翻译：由铜或镍冶炼炉生产的从金属冶炼炉渣回收金属和生产二次炉渣的方法包括将冶炼炉渣与选自碳，碳化钙，硅铁和铝的至少一种还原剂混合，所述碳并且碳化钙（如果存在）为渣的约1重量％至约40重量％，并且所述铝（如果存在）为炉渣的约2重量％至约35重量％，并且为零至约70重量％氧化钙以炉渣的重量加热，如果铝作为还原剂存在于熔点以上，则将铝混合物加热，以将冶炼炉渣还原成含铁和可能的硅和铝的金属合金，这取决于添加到冶炼厂中的铝量渣和重金属如铜，镍和钴，在熔渣中，从而也产生含有至少一种选自以下的化合物的二次渣：硅酸铝，铝酸钙，熔融氧化铝和铁酸钙铝硅酸盐，并将金属合金与二次渣分离。

6. 发明授权

US3965243A Recovery of sodium thiocyanate 失效
标题翻译：回收硫氰酸钠
公开(公告)号：US3965243A
公开(公告)日：1976-06-22
申请号：US504776
申请日：1974-09-10
申请人： David Krofchak
发明人： David Krofchak
IPC分类号： B01D53/14 , B01D53/52 , B01D53/77 , C01C3/20 , C10K1/12 , B01D53/34
CPC分类号： C01C3/20 , C10K1/12
摘要： A process is described whereby accumulated impurities, consisting mainly of sodium tiocyanate are continuously removed from scrubbing liquors used for removal of hydrogen sulphide from fuel gases and the liquors thereby regenerated and re-used in the hydrogen sulphide scrubbing operation. The thiocyanate is removed by contacting the used scrubbing liquor with an organic solvent, e.g. n-butanol, separating the thiocyanate-bearing solvent from the scrubbing liquor, re-using the treated scrubbing liquor, recovering the thiocyanate from the solvent and re-using the solvent. The extracted sodium thiocyanate can be converted to pure, saleable chemicals or converted to an alkali which can be re-used in the absorbing liquors, thereby producing a completely closed system with no effluent.
摘要翻译：描述了一种方法，其中主要由硫氰酸钠组成的积累的杂质从用于从燃料气体中除去硫化氢的洗涤液连续地除去，并且由此在硫化氢洗涤操作中再次使用和再次使用。通过使用的洗涤液与有机溶剂接触除去硫氰酸盐，例如，正丁醇，将含硫氰酸酯的溶剂与洗涤液分离，重新使用经处理的洗涤液，从溶剂中回收硫氰酸盐并重新使用溶剂。提取的硫氰酸钠可以转化成纯的，可销售的化学物质，或者转化成可以在吸收液中再次使用的碱，从而产生没有流出物的完全封闭的体系。

7. 发明申请

US20070209476A1 Treatment of base metal smelter slag 审中-公开
标题翻译：贱金属冶炼炉渣处理
公开(公告)号：US20070209476A1
公开(公告)日：2007-09-13
申请号：US11513067
申请日：2006-08-31
申请人： David Krofchak
发明人： David Krofchak
IPC分类号： C21B3/06
CPC分类号： C21B3/06 , C21B2400/02 , C21C7/0025 , C22B7/04 , C22B15/0054 , C22B23/025 , Y02P10/212 , Y02W30/543
摘要： A process for treating base metal smelter slag containing from about 20 to about 60 percent by weight iron and at least one further metal selected from the group consisting of nickel, copper and cobalt comprises mixing base metal smelter slag with calcium sulphate and carbon and melting the resultant mixture to produce a metallic sulphide matte containing substantially all the further metal or metals and a secondary slag substantially free of the further metal or metals suitable for use as a cement.
摘要翻译：一种用于处理含有约20至约60重量％的铁和至少一种选自镍，铜和钴的另外的金属的贱金属冶炼炉渣的方法包括将贱金属冶炼炉渣与硫酸钙和碳混合并将产生基本上所有其它金属或金属的金属硫化物锍和基本上不含适用于水泥的其它金属或金属的二次炉渣。

8. 发明授权

US06231767B1 Treatment of phosphatic wastes 失效
标题翻译：处理磷酸盐废物
公开(公告)号：US06231767B1
公开(公告)日：2001-05-15
申请号：US09250151
申请日：1999-02-16
申请人： David Krofchak , Roberto Berardi
发明人： David Krofchak , Roberto Berardi
IPC分类号： C02F100
CPC分类号： C04B7/24 , B03B9/061 , C04B18/0481 , C05B11/08 , C05B17/00 , Y02P40/145 , Y02W30/91 , Y10S210/906 , Y10S210/907 , C04B20/02
摘要： A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened phosphatic clay suspension having a solid content of from about 4 to about 40 percent by weight, includes mixing a sufficient amount of deflocculating agent with a thickened phosphatic clay suspension to cause deflocculation of the suspension to an extent sufficient to reduce the viscosity thereof to a value enabling the deflocculated suspension to be readily pumped from one location to another, the deflocculating agent comprising an alkali compound of a phosphorus oxide. The deflocculated suspension of reduced viscosity is pumped from one location to another and separated into a clay suspension and a phosphatic mineral and sand suspension. The non-clay minerals are dissolved in the phosphatic mineral and sand suspension in dilute sulfuric acid to separate a phosphatic fraction as phosphoric acid from a sand fraction. A cementitious material is produced by heating clay, phosphogypsum and sand in a kiln, and the cementitious material is mixed with the clay suspension and the sand fraction in an amount sufficient to cause the formation of large silicate molecules with resultant gelling and setting of the suspensions into an inert solid material.
摘要翻译：一种处理通过水精选和化学处理在磷酸盐矿石加工中产生的增稠的磷酸钙粘土悬浮液，废粘土和磷石膏的方法，固体含量为约4至约40重量％的增稠的磷酸粘土悬浮液包括混合足够量的具有增稠的磷酸钙粘土悬浮液的抗絮凝剂以使悬浮液的抗絮凝程度足以将其粘度降低到能够使絮凝的悬浮液容易地从一个位置泵送到另一个位置的值，所述抗絮凝剂包含碱性化合物的磷氧化物。降低粘度的絮凝悬浮液从一个位置泵送到另一个位置，并分离成粘土悬浮液和磷矿物和砂悬浮液。将非粘土矿物质溶解在稀硫酸中的磷酸矿物和砂悬浮液中，以从磷砂中分离磷酸盐级分。通过在窑中加热粘土，磷石膏和砂子来生产水泥材料，并且将水泥质材料与粘土悬浮液和沙子组分混合，其量足以引起大的硅酸盐分子的形成，从而形成胶凝和凝固悬浮液成为惰性固体材料。

9. 发明授权

US4216012A Process for the treatment of incinerated sewage sludge ash 失效
标题翻译：焚烧污水泥灰处理工艺
公开(公告)号：US4216012A
公开(公告)日：1980-08-05
申请号：US23224
申请日：1979-03-23
申请人： David Krofchak
发明人： David Krofchak
IPC分类号： B09B3/00 , C02F11/00 , C22B7/00 , C22B11/08
CPC分类号： C22B11/04 , B09B3/00 , C02F11/008 , C22B11/08 , C22B7/007 , Y02P10/234
摘要： A process for the treatment of incinerated sewage sludge ash containing silicic compounds and metal values including phosphorus and at least one precious metal comprises leaching the ash in an acid solution in a first leach to dissolve phosphorus. The leach solution is separated from the undissolved residue, which is then treated to recover at least one precious metal.
摘要翻译：用于处理含有硅化合物和包含磷和至少一种贵金属的金属价值的焚烧的污水泥灰的方法包括将灰分浸入第一浸出中的酸溶液中以溶解磷。浸出溶液与未溶解的残余物分离，然后将其处理回收至少一种贵金属。

10. 发明授权

US06440194B1 Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag 失效
标题翻译：从金属冶炼炉渣中回收从铝合金制成的贵金属
公开(公告)号：US06440194B1
公开(公告)日：2002-08-27
申请号：US09716425
申请日：2000-11-21
申请人： David Krofchak , Roberto Berardi
发明人： David Krofchak , Roberto Berardi
IPC分类号： C22B308
CPC分类号： C22B7/04 , C22B3/08 , C22B11/023 , Y02P10/214 , Y02P10/234
摘要： A method of recovering precious metals from metal alloys produced aluminothermically from base metal smelter slag, includes treating the metal alloy with aqueous sulphuric acid solution having a pH of not greater than about 2 to cause dissolution of nickel and/or cobalt and iron and to cause formation of hydrogen sulfide which reacts with copper in the metal alloy to form a copper sulfide precipitate containing at least one precious metal, and separating the copper sulphide precipitate containing at least one precious metal from the remaining solution containing cobalt sulphate and/or nickel sulphate and ferrous sulphate.
摘要翻译：从金属冶炼炉渣铝热回收的金属合金中回收贵金属的方法包括用pH不大于约2的硫酸水溶液处理金属合金，引起镍和/或钴和铁的溶解并引起形成硫化氢，其与金属合金中的铜反应形成含有至少一种贵金属的硫化铜沉淀物，以及从含有硫酸钴和/或硫酸镍的剩余溶液中分离含有至少一种贵金属的硫化铜沉淀物，以及硫酸亚铁。

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