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    • 7. 发明公开
    • Recovery of elemental sulphur from products containing contaminated elemental sulphur by froth flotation
    • 通过中硫污染产品的泡沫浮选elementärem硫的回收率。
    • EP0240380A2
    • 1987-10-07
    • EP87400368.4
    • 1987-02-19
    • ION ADAMACHE
    • ION ADAMACHE
    • C01B17/027B03B9/00
    • B03B9/00B03B9/061B03D1/002B03D1/006B03D1/008B03D1/012B03D1/02B03D2201/02B03D2201/04B03D2203/005B03D2203/006C01B17/027Y02W30/521
    • A new 'cold' process for the recovery of elemental sulphur from contaminated elemental sulphur products is described. Elemental sulphur is recovered by froth flotation from: contaminated base pads of elemental sulphur blocks, stockpiles of contaminated elemental sulphur; contaminated elemental sulphur rejects from industrial handling and hauling; complex sulphur agglomerate, reject by-product from hot melting processes which is presently unprocessable and discarded (or as is otherwise referred to as 'sulphur crete melt residue'); contaminated products resulting from the exploitation processes using wells for the application of heat to reservoirs in order to recover elemental sulphur; and also from otl er sources of contaminated elemental sulphur in the oil and gas and other industries. This process comprises the steps of coarse screening, crushing, wet grinding, sizing, classifying. Then, the wet ground slurry at ambient temperature is treated by froth flotation, removing the elemental sulphur in the froth, and transporting undesirable contaminants to storage ponds or subsequent land reclamation. The initial elemental sulphur froth from the first stage of flotation is cleaned one or more times by reflotations. The cleaned elemental sulphur-bearing froth is then filtered to reinove excess water and to produce a filter cake.
    • 被描述为元素硫从单质硫污染的产品回收新的“冷”的过程。 元素硫是通过泡沫浮选回收从:元素硫的块,被污染的元素硫的储存污染基垫; 污染元素硫从工业装卸和牵引拒绝; 复杂的附聚物硫,从热熔融过程拒绝副产品所有这是目前无法处理和丢弃(或以其它方式通过向称为“硫克里特熔化残余”); 污染的产品从开采所得工艺使用井的热施加到以回收元素硫贮存器; 因此,从在油污染元素硫和天然气等行业的其他来源。 该方法包括粗筛,粉碎,湿式粉碎,上浆,分级的步骤。 然后,在环境温度下将湿地面浆料通过泡沫浮选处理,除去在泡沫中的元素硫,并输送不希望的污染物,以存储池塘或随后的土地开垦。 从浮选的第一阶段的初始元素硫泡沫由reflotations清洗一次或多次。 然后将清洁的元素硫承载泡沫被过滤以除去过量的水并产生滤饼。
    • 9. 发明授权
    • Process for purifying silica sand
    • 二氧化硅砂的净化工艺
    • US4401638A
    • 1983-08-30
    • US333257
    • 1981-12-21
    • Alejandro J. CaballeroRicardo I. Holcombe
    • Alejandro J. CaballeroRicardo I. Holcombe
    • B03B9/00B03D1/004B03D1/018B03D1/02C03C1/02C01B33/12
    • B03D1/02B03B9/00B03D1/002B03D1/008B03D1/01B03D1/012C03C1/022B03D2201/007B03D2201/02B03D2201/04B03D2203/005
    • 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.
    • 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。