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公开(公告)号：US4298582A
公开(公告)日：1981-11-03
申请号：US140569
申请日：1980-04-15
CPC分类号： C01G31/00 , C22B34/22 , C22B34/30 , Y02P10/234
摘要： Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup.=, VO.sub.4.sup..ident., WO.sub.4.sup.=, and CrO.sub.4.sup.= and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.-, CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to Cr.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced. This is treated with carbonated water or formic acid to selectively dissolve vanadium values which are subsequently recovered by precipitation or extraction. The remaining mixed CaWO.sub.4 and CaMoO.sub.4 solid is treated with H.sub.2 O.sub.2 and sulfuric acid to reject a Mo and W-free CaSO.sub.4 precipitate, and to produce a concentrated solution of tungsten and molybdenum. The W values are selectively precipitated from this solution by decomposing the peroxy complexes. The process has the advantages that a wide variety of different feed materials can be treated, no energy intensive pyrometallurgy is involved, reagent consumption is minimized, and no aqueous effluents are produced.
摘要翻译： 公开了从二次资源中回收铬，钒，钼和钨的方法，例如包含难熔金属和诸如钴，镍，铁和铜的贱金属的合金废料。 将废料用碳酸钠在空气中煅烧以将难熔金属值转化为MoO4 =，VO4 =，WO4 =和CrO4 =，并将贱金属转化为水不溶性氧化物。 煅烧材料的浸出产生富含难熔金属的怀孕液体，在分离钒，钼和钨的值后，用CO，CHOO-，CH 3 OH或HCHO处理以将Cr + 6还原为Cr + 3。 作为还原的副产物产生的碳酸盐和碳酸氢盐被再循环到煅烧阶段。 作为V，W和Mo分隔的结果，制备了包含CaO·nV 2 O 5，CaMoO 4和CaWO 4的混合固体。 用碳酸水或甲酸处理，以选择性地溶解钒值，随后通过沉淀或萃取回收。 剩余的混合CaWO4和CaMoO4固体用H 2 O 2和硫酸处理以排除Mo和无W的CaSO 4沉淀物，并产生钨和钼的浓溶液。 W值通过分解过氧配合物从该溶液中选择性沉淀。 该方法的优点是可以处理各种不同的饲料，不涉及能量密集的火法冶金，减少试剂消耗，不产生含水废水。
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公开(公告)号：US4305754A
公开(公告)日：1981-12-15
申请号：US140435
申请日：1980-04-15
CPC分类号： C22B34/22 , C22B34/30 , Y02P10/234
摘要： Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup..dbd., VO.sub.4.sup..tbd., WO.sub.4.sup..dbd., CrO.sub.4.sup..dbd., and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.-, CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to Cr.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.multidot.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced. This is treated with carbonated water or formic acid to selectively dissolve vanadium values which are subsequently recovered by precipitation or extraction. The remaining mixed CaWO.sub.4 and CaMoO.sub.4 solid is treated with H.sub.2 O.sub.2 and sulfuric acid to reject a Mo and W-free CaSO.sub.4 precipitate, and to produce a concentrated solution of tungsten and molybdenum. The W values are selectively precipitated from this solution by decomposing the peroxy complexes. The process has the advantages that a wide variety of different feed materials can be treated, no energy intensive pyrometallurgy is involved, reagent consumption is minimized, and no aqueous effluents are produced.
摘要翻译： 公开了从二次资源中回收铬，钒，钼和钨的方法，例如包含难熔金属和诸如钴镍，铁和铜的贱金属的合金废料。 将废料用碳酸钠在空气中煅烧以将难熔金属值转化为MoO4 =，VO4 3BOND，WO4 =，CrO4 =，并将贱金属转化为水不溶性氧化物。 煅烧材料的浸出产生富含难熔金属的怀孕液体，在分离钒，钼和钨的值后，用CO，CHOO-，CH 3 OH或HCHO处理以将Cr + 6还原为Cr + 3。 作为还原的副产物产生的碳酸盐和碳酸氢盐被再循环到煅烧阶段。 作为V，W和Mo分隔物的结果，制备了包含CaO x V 2 O 5，CaMoO 4和CaWO 4的混合固体。 用碳酸水或甲酸处理，以选择性地溶解钒值，随后通过沉淀或萃取回收。 剩余的混合CaWO4和CaMoO4固体用H 2 O 2和硫酸处理以排除Mo和无W的CaSO 4沉淀物，并产生钨和钼的浓溶液。 W值通过分解过氧配合物从该溶液中选择性沉淀。 该方法的优点是可以处理各种不同的饲料，不涉及能量密集的火法冶金，减少试剂消耗，不产生含水废水。
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3.发明授权Process for partitioning Mo and W from a mixed CaMoO.sub.4 -CaWO.sub.4 precipitate 失效从混合的CaMoO4-CaWO4沉淀中分配Mo和W的方法
公开(公告)号：US4278644A
公开(公告)日：1981-07-14
申请号：US140436
申请日：1980-04-15
CPC分类号： C22B34/22 , C22B34/30 , C22B34/34 , C22B34/36 , C22B7/001 , Y02P10/214 , Y02P10/234 , Y02P10/236
摘要： Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup..dbd., VO.sub.4.sup..tbd., WO.sub.4.sup..dbd., and CrO.sub.4.sup..dbd. and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.-, CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to Cr.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced. This is treated with carbonated water or formic acid to selectively dissolve vanadium values which are subsequently recovered by precipitation or extraction. The remaining mixed CaWO.sub.4 and CaMoO.sub.4 solid is treated with H.sub.2 O.sub.2 and sulfuric acid to reject a Mo and W-free CaSO.sub.4 precipitate, and to produce a concentrated solution of tungsten and molybdenum. The W values are selectively precipitated from this solution by decomposing the peroxy complexes. The process has the advantages that a wide variety of different feed materials can be treated, no energy intensive pyrometallurgy is involved, reagent consumption is minimized, and no aqueous effluents are produced.
摘要翻译： 公开了从二次资源中回收铬，钒，钼和钨的方法，例如包含难熔金属和诸如钴，镍，铁和铜的贱金属的合金废料。 将废料用碳酸钠在空气中煅烧以将难熔金属值转化为MoO4 =，VO4 3BOND，WO4 =和CrO4 =，并将贱金属转化为水不溶性氧化物。 煅烧材料的浸出产生富含难熔金属的怀孕液体，在分离钒，钼和钨的值后，用CO，CHOO-，CH 3 OH或HCHO处理以将Cr + 6还原为Cr + 3。 作为还原的副产物产生的碳酸盐和碳酸氢盐被再循环到煅烧阶段。 作为V，W和Mo分隔的结果，制备了包含CaO·nV 2 O 5，CaMoO 4和CaWO 4的混合固体。 用碳酸水或甲酸处理，以选择性地溶解钒值，随后通过沉淀或萃取回收。 剩余的混合CaWO4和CaMoO4固体用H 2 O 2和硫酸处理以排除Mo和无W的CaSO 4沉淀物，并产生钨和钼的浓溶液。 W值通过分解过氧配合物从该溶液中选择性沉淀。 该方法的优点是可以处理各种不同的饲料，不涉及能量密集的火法冶金，减少试剂消耗，不产生含水废水。
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公开(公告)号：US4320094A
公开(公告)日：1982-03-16
申请号：US140428
申请日：1980-04-15
CPC分类号： C22B34/20 , C22B34/30 , C22B7/001 , C22B7/006 , Y02P10/214 , Y02P10/22 , Y02P10/224 , Y02P10/23 , Y02P10/234 , Y02P10/236
摘要： Alloy scrap containing refractory metals such as chromium, molybdenum, tungsten, vanadium, niobium and tantalum and base metals such as nickel, cobalt, copper and iron are treated to partition the refractory metal values from the base metal values without an energy intensive remelting step. The scrap in finely divided form is calcined in the presence of an oxygen containing gas and a member of a certain group of alkali metal salts at a temperature in the range of 800.degree. C. to 1150.degree. C. for 1/4 hour to four hours. This treatment converts the refractory metals to alkali metal molybdates, tungstates, chromates, vanadates, niobates and tantalates and the base metals to oxides. The calcined product may then be water leached to produce a substantially base metal-free liquor rich in refractory metal values. Both the refractory and the base metal values may be subsequently recovered by conventional hydrometallurgical techniques.
摘要翻译： 处理含有难熔金属如铬，钼，钨，钒，铌和钽以及诸如镍，钴，铜和铁的贱金属的合金废料，以将不熔金属值与贱金属值分开，而无需能量密集的重熔步骤。 细碎形式的废料在含氧气体和某一组碱金属盐的成员的存在下在800至1150℃的温度范围内煅烧1/4小时至4 小时。 该处理将难熔金属转化为碱金属钼酸盐，钨酸盐，铬酸盐，钒酸盐，铌酸盐和钽酸盐，并将贱金属转化为氧化物。 然后煅烧产物可以被水浸洗以产生富含难熔金属值的基本上无碱金属的液体。 耐火材料和贱金属值都可以随后通过常规的湿法冶金技术回收。
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5.发明授权Process for recovering chromium, vanadium, molybdenum and tungsten values from a feed material 失效从原料中回收铬，钒，钼和钨的值的方法
公开(公告)号：US4298581A
公开(公告)日：1981-11-03
申请号：US140437
申请日：1980-04-15
CPC分类号： C22B34/22 , C22B34/30 , Y02P10/234
摘要： Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup.=, VO.sub.4.sup..ident., WO.sub.4.sup.=, and CrO.sub.4.sup.= and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.- CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to CR.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced. This is treated with carbonated water or formic acid to selectively dissolve vanadium values which are subsequently recovered by precipitation or extraction. The remaining mixed CaWO.sub.4 and CaMoO.sub.4 solid is treated with H.sub.2 O.sub.2 and sulfuric acid to reject a Mo and W-free CaSO.sub.4 precipitate, and to produce a concentrated solution of tungsten and molybdenum. The W values are selectively precipitated from this solution by decomposing the peroxy complexes. The process has the advantages that a wide variety of different feed materials can be treated, no energy intensive pyrometallurgy is involved, reagent comsumption is minimized, and no aqueous effluents are produced.
摘要翻译： 公开了从二次资源中回收铬，钒，钼和钨的方法，例如包含难熔金属和诸如钴，镍，铁和铜的贱金属的合金废料。 将废料用碳酸钠在空气中煅烧以将难熔金属值转化为MoO4 =，VO4 =，WO4 =和CrO4 =，并将贱金属转化为水不溶性氧化物。 煅烧材料的浸出产生富含难熔金属的怀孕液体，在分离钒，钼和钨的值后，用CO，CHOO-CH 3 OH或HCHO处理以将Cr +6还原为CR + 3。 作为还原的副产物产生的碳酸盐和碳酸氢盐被再循环到煅烧阶段。 作为V，W和Mo分隔的结果，制备了包含CaO·nV 2 O 5，CaMoO 4和CaWO 4的混合固体。 用碳酸水或甲酸处理，以选择性地溶解钒值，随后通过沉淀或萃取回收。 剩余的混合CaWO4和CaMoO4固体用H 2 O 2和硫酸处理以排除Mo和W的CaSO 4沉淀，并产生钨和钼的浓溶液。 W值通过分解过氧配合物从该溶液中选择性沉淀。 该方法具有可以处理各种各样的不同进料的优点，不涉及能量密集的火法冶金，试剂消耗最小化，并且不产生含水流出物。
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