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1. 发明授权

US4401638A Process for purifying silica sand 失效
标题翻译：二氧化硅砂的净化工艺
公开(公告)号：US4401638A
公开(公告)日：1983-08-30
申请号：US333257
申请日：1981-12-21
申请人： Alejandro J. Caballero , Ricardo I. Holcombe
发明人： Alejandro J. Caballero , Ricardo I. Holcombe
IPC分类号： B03B9/00 , B03D1/004 , B03D1/018 , B03D1/02 , C03C1/02 , C01B33/12
CPC分类号： B03D1/02 , B03B9/00 , B03D1/002 , B03D1/008 , B03D1/01 , B03D1/012 , C03C1/022 , B03D2201/007 , B03D2201/02 , B03D2201/04 , B03D2203/005
摘要： A process of purifying silica sand comprises grinding sandstone, washing and desliming the ground sandstone to remove the major part of the clay-type binder, attrition-scrubbing the deslimed sand particles to release further amounts of binder therefrom, washing and desliming to remove said binder, drying and heating the sand particles, treating the hot sand with sulfuric acid to convert the iron oxides, ferrosilicates and ferro-aluminous impurities into water soluble compounds, attrition-scrubbing the hot suspension of the chemically treated sand to release the strongly adhering stains of said impurities, washing with cold water and desliming, conditioning the sand suspension with fatty acids or petroleum sulfonate collectors, a polyalcohol frothing agent and, if necessary, a mineral acid to bring the pH to from 1.5 to 7.0, carrying out a first froth-flotation to remove the remaining ferrosilicates and iron oxides, and carrying out a second froth-flotation with a fatty amine collector in the presence of sulfuric acid and/or hydrofluoric acid to activate the aluminosilicates and to remove the same at a pH of from 1.5 to 3.5.
摘要翻译：净化硅砂的方法包括研磨砂岩，洗涤和脱灰砂土，以除去粘土型粘合剂的主要部分，对去渣砂粒进行磨砂洗涤以从其中释放更多量的粘合剂，洗涤和脱浆以除去所述粘合剂，干燥和加热砂粒，用硫酸处理热砂，将铁氧化物，硅酸盐和铁 - 铝杂质转化成水溶性化合物，擦洗化学处理的砂的热悬浮液，释放强烈粘附的污渍所述杂质，用冷水洗脱并脱蜡，用脂肪酸或石油磺酸盐收集器调节沙子悬浮液，多元醇起泡剂和必要时的无机酸使pH值达到1.5至7.0，进行第一泡沫 - 浮选以除去剩余的硅酸硅和氧化铁，并用脂肪胺收集器进行第二泡沫浮选在硫酸和/或氢氟酸的存在下活化铝硅酸盐并在1.5至3.5的pH下除去硅铝酸盐。

2. 发明授权

US4405588A Process of removing iron impurities from ores 失效
标题翻译：从矿石中除去铁杂质的工艺
公开(公告)号：US4405588A
公开(公告)日：1983-09-20
申请号：US333256
申请日：1981-12-21
申请人： Alejandro J. Caballero , Ricardo I. Holcombe
发明人： Alejandro J. Caballero , Ricardo I. Holcombe
IPC分类号： B03B9/00 , C03C1/02 , C22B1/00 , C01B33/12
CPC分类号： C22B1/00 , B03B9/00 , C03C1/022
摘要： A process of removing iron impurities from ores, particularly useful for removing stains of iron impurities adhered to silica sand particles, comprises grinding the ore, washing and desliming the ground ore to remove the major part of the clay-type binder, attrition-scrubbing the deslimed particles to release further amounts of binder therefrom, washing and desliming to remove said binder, drying and heating the ore particles, treating the hot particles with a chemical agent suitable to conver the iron impurities into water soluble iron compounds, attrition-scrubbing the hot suspension of chemically treated particles to release the stains of iron impurities, and washing with cold water and desliming to recover the purified ore particles.
摘要翻译：从矿石中除去铁杂质的方法，特别适用于除去附着在硅砂颗粒上的铁杂质的污渍，包括研磨矿石，洗涤和脱灰研磨矿石以除去粘土型粘合剂的主要部分，磨擦去除颗粒以从其中释放更多量的粘合剂，洗涤和脱浆以除去所述粘合剂，干燥和加热矿石颗粒，用适于将铁杂质转化成水溶性铁化合物的化学试剂处理热颗粒，擦洗热悬浮化学处理的颗粒以释放铁杂质污渍，并用冷水洗涤并脱盐以回收纯化的矿石颗粒。

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