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公开(公告)号：US5743968A
公开(公告)日：1998-04-28
申请号：US821154
申请日：1997-03-20
摘要： A process for removing scale from stainless steel using an aqueous solution containing hydrogen peroxide and an inorganic acid, i.e., hydrochloric or sulfuric acid. A hot rolled or annealed stainless steel strip (10) covered with scale is immersed into hot inorganic acid contained within pickling tanks (12) and (14). Thereafter, the strip may have residual amounts of tightly adherent scale (11). This scale is activated by a solution containing the inorganic acid and hydrogen peroxide applied to the strip such as by a spray header (16) extending completely transversely across and positioned above the strip and another spray header (18) extending completely transversely across and positioned below the strip. It may be desirable to pass the activated strip through the hot inorganic acid again and reactivate the strip at very high line speeds to insure complete removal of scale from the strip. Any hydrogen peroxide spray dripping from the strip is collected on a catch pan (30) and flowed into a tank (28). Preferably, the collected spent aqueous solution containing the inorganic acid and spent hydrogen peroxide is disposed in the pickling tanks. The aqueous solution aids in the removal of any residual scale and smut remaining on the strip thereby improving the cleanliness of the pickled strip.
摘要翻译： 使用含有过氧化氢和无机酸（即盐酸或硫酸）的水溶液从不锈钢去除垢的方法。 用鳞片覆盖的热轧或退火的不锈钢带（10）浸入酸洗槽（12）和（14）中所含的热无机酸中。 此后，条带可能具有残留量的紧密附着标尺（11）。 该标尺由含有无机酸和过氧化氢的溶液激活，例如通过完全横向延伸并定位在条带上方的喷头（16）和另一个完全横向延伸并位于下方的喷头（18） 带子。 可能需要使活化的带通过热无机酸再次以非常高的线速度重新激活条，以确保从带中完全去除垢。 将从条带滴落的任何过氧化氢喷雾液收集在捕集盘（30）上并流入罐（28）。 优选地，将收集的含有无机酸和废过氧化氢的废水溶液设置在酸洗槽中。 水溶液有助于去除残留在条带上的残留量和污迹，从而提高酸洗条的清洁度。
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公开(公告)号：US5106467A
公开(公告)日：1992-04-21
申请号：US593435
申请日：1990-10-05
CPC分类号： C22B19/24 , C22B19/30 , Y02P10/234
摘要： Caustic dezincing galvanized steel scrap. A dezincing plant includes a plurality of tanks interconnected in series with steel scrap sequentially being moved through each of the tanks. The tanks contain a caustic leaching solution including an oxidant with the leaching solution being circulated through each of the tanks in a direction opposite to the movement of the scrap. Fresh scrap initially is exposed to a partially depleted leaching solution with the oxidant concentration of the leaching solution increasing as the scrap moves through the series of tanks. Leaching solution depleted of its oxidant is transferred to an electrolytic cell where zinc is removed and plated as metallic zinc powder onto a cathode. The leaching solution is recycled by removing zinc. The chemistry of the leaching solution is controlled so that sufficient free caustic is present to prevent passivating zinc coating on the scrap. Oxidant is added to the recycled solution and the caustic concentration is adjusted, if necessary, to have a total caustic concentration of at least 5 M and the recycled solution is returned to the last tank. Compressed scrap bales are dezinced and ready for use as a melting furnace charge material.
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公开(公告)号：US06645306B2
公开(公告)日：2003-11-11
申请号：US10118765
申请日：2002-04-09
IPC分类号： C23G102
摘要： The present invention relates to a process for pickling hot rolled, hot rolled & annealed, and cold rolled & annealed stainless steel strip in a continuous fashion. The process comprises a series of pre-pickling tanks and pickling tanks, and optionally includes a scrubber-brush tank, a de-smutting tank, a filtration unit and a heat exchanger.
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公开(公告)号：US06746614B2
公开(公告)日：2004-06-08
申请号：US10119112
申请日：2002-04-09
申请人： Vijay N. Madi , Jerald W. Leeker
发明人： Vijay N. Madi , Jerald W. Leeker
IPC分类号： C02F120
CPC分类号： C23G1/36 , C02F1/02 , C02F2101/10 , C02F2103/16 , C02F2209/40 , C23G1/08 , Y10S423/01
摘要： The present invention provides a process for the removal of hydrogen peroxide from spent pickle liquor used in a steel strip pickling process. The process utilizes an enclosed decomposition tank which includes a pickle liquor inlet pipe, an outlet pipe, at least one vent pipe, an internal baffle, and a heat source.
摘要翻译： 本发明提供了一种从用于钢带酸洗工艺的废酸洗液中除去过氧化氢的方法。 该方法使用封闭的分解罐，其包括泡菜液入口管，出口管，至少一个排气管，内部挡板和热源。
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公开(公告)号：US6088895A
公开(公告)日：2000-07-18
申请号：US234816
申请日：1999-01-21
CPC分类号： B21B1/28 , B21B45/06 , Y10T29/45 , Y10T29/4517 , Y10T29/49989
摘要： This invention relates to a process for producing a cold rolled, recrystallation annealed, stainless steel strip having lustrous surfaces without being hot band annealed and/or pickled prior to cold reduction. The process includes the sequential steps of tension leveling to crack the scale and flatten a hot processed metal strip, shot blasting the strip to ablatively remove the scale and to provide a surface roughness less than 3.6 micron Ra using at least two pairs of wire brushes positioned adjacent to both surfaces of the strip with these cleaning brushes being rotated in opposite directions relative to each other to mechanically remove any residual scale. The mechanically cleaned strip then is mechanically polished with another pair of brushes to reduce the roughness to less than 2.0 micron Ra, cold reduced to have a surface roughness less than 0.4 micron Ra and recrystallization annealed. The particulate shot has a size of 0.10-0.50 mm. The cleaning brushes have a surface density of at least 12% unit square surface area and the bristles of the cleaning brushes have a tip diameter of 0.13-0.50 mm.
摘要翻译： 本发明涉及一种在冷还原之前生产具有光泽表面而不进行热带退火和/或酸洗的冷轧，再结晶退火的不锈钢带的方法。 该方法包括拉伸平整度以破裂氧化皮的顺序步骤，使热处理的金属带平坦化，对带进行喷砂处理以消除氧化皮，并使用至少两对定位的丝刷提供小于3.6微米的Ra的表面粗糙度 邻近带的两个表面，这些清洁刷相对于彼此沿相反的方向旋转以机械地去除任何残余尺度。 机械清洁的条带然后用另一对刷子机械抛光，以将粗糙度减小到小于2.0微米的Ra，冷还原成具有小于0.4微米的Ra的表面粗糙度并重结晶退火。 颗粒状喷丸的尺寸为0.10-0.50mm。 清洁刷具有至少12％单位面积面积的表面密度，并且清洁刷的刷毛具有0.13-0.50mm的尖端直径。
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公开(公告)号：US06802965B2
公开(公告)日：2004-10-12
申请号：US10683717
申请日：2003-10-10
申请人： Vijay N. Madi , Jerald W. Leeker
发明人： Vijay N. Madi , Jerald W. Leeker
IPC分类号： C02F120
CPC分类号： C23G1/36 , C02F1/02 , C02F2101/10 , C02F2103/16 , C02F2209/40 , C23G1/08 , Y10S423/01
摘要： The present invention provides a process for the removal of hydrogen peroxide from spent pickle liquor used in a steel strip pickling process. The process utilizes an enclosed decomposition tank which includes a pickle liquor inlet pipe, an outlet pipe, at least one vent pipe, an internal baffle, and a heat source.
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7.发明授权公开(公告)号：US06599371B2
公开(公告)日：2003-07-29
申请号：US10119444
申请日：2002-04-09
IPC分类号： C23G102
摘要： The pickling process of the present invention is designed for pickling electrical steel strip in a continuous fashion and comprises at least one pickling tank equipped with at least one set of sprayers designed to spray the top and bottom surfaces of a steel strip with a solution comprised of hydrogen peroxide prior to and/or after the strip is immersed in a solution contained in a pickling tank. The set(s) of sprayers in each of the pickling tanks are located above the level of the pickle bath solution, rather than being located in separate spray tanks. Upon exiting the final pickling tank, the strip is brushed/scrubbed to loosen any residual scale to form a clean strip.
摘要翻译： 本发明的酸洗方法被设计成以连续的方式酸洗电钢带，并且包括装备有至少一组喷雾器的至少一个酸洗槽，其设计成用钢板的顶表面和底表面喷涂由 在将条带浸入包含在酸洗槽中的溶液之前和/或之后的过氧化氢。 每个酸洗槽中的一组或多个喷雾器位于泡菜浴溶液的水平面之上，而不是位于单独的喷雾罐中。 在离开最终的酸洗槽后，将带材刷洗/洗涤以松开任何残留的水垢以形成干净的条带。
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公开(公告)号：US5702534A
公开(公告)日：1997-12-30
申请号：US667498
申请日：1996-05-24
摘要： A process for removing scale from stainless steel using an aqueous solution containing hydrogen peroxide. A hot rolled or annealed stainless steel strip (10) covered with scale is immersed into hot sulfuric acid contained within tanks (12) and (14). Thereafter, the strip may have residual amounts of tightly adherent scale (11). This scale is activated by the aqueous solution containing hydrogen peroxide applied to the strip such as by a spray header (16) extending completely transversely across and positioned above the strip and another spray header (18) extending completely transversely across and positioned below the strip. Any peroxide spray dripping from the, strip is collected on a catch pan (30) and flowed into a tank (28). Preferably, the peroxide solution is a dilute concentration of the acid in tanks (12) and (14). The hydrochloric acid removes smut from the strip formed by the sulfuric acid to improve the cleanliness of the pickled strip.
摘要翻译： 使用含有过氧化氢的水溶液从不锈钢去除垢的方法。 用鳞片覆盖的热轧或退火的不锈钢带（10）浸入容器（12）和（14）中所含的热硫酸中。 此后，条带可能具有残留量的紧密附着标尺（11）。 该标尺由含有过氧化氢的水溶液活化，例如通过完全横向延伸穿过条带的喷头（16）和位于条带上方的另一个喷雾头（18）横穿横穿并位于条带下方的喷头。 将从条带滴落的任何过氧化物喷雾液收集在捕集盘（30）上并流入罐（28）。 优选地，过氧化物溶液是罐（12）和（14）中酸的稀释浓度。 盐酸从硫酸形成的条上除去污点，以提高酸洗条的清洁度。
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