Recycling Off-Grade Zircaloy Scrap Using a Molten-Salt Electro-Refining Process

Abstract ALLEGHENY LUDLUM E-BRITE 26-1 ALLOY is a low-carbon, low-nitrogen ferritic stainless steel made by a vacuum refining process. It provides: (1) Excellent resistance to pitting and crevice corrosion in chloride-containing environments, (2) Excellent resistance to chloride stress-corrosion cracking, (3) Resistance to intergranular corrosion, (4) Resistance to a wide variety of corrosive environments, and (5) Improved toughness and ductility after welding. Its applications include equipment for handling caustic, organic acids, nitric acid, bleach solutions, urea and chloride containing cooling waters. This datasheet provides information on composition, physical properties, microstructure, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-360. Producer or source: Allegheny Ludlum Corporation.

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Extra colour removal in a refinery

Sugar Industry ◽

10.36961/si12200 ◽

2011 ◽

pp. 718-725 ◽

Cited By ~ 1

Author(s):

Laura Diego ◽

Fernando Martín ◽

Marta G de Quevedo ◽

Jaime Sagristá

Keyword(s):

Refining Process ◽

Ion Exchange Resins ◽

Colour Removal ◽

Precipitated Calcium Carbonate ◽

Sodium Bisulphite ◽

Powdered Carbon ◽

Raw Sugar ◽

Sugar Refinery ◽

Exchange Resins ◽

Main Factor

The main factor affecting the raw sugar refining process is certainly “colour”. The higher colour removal, the higher is the obtained sugar yield. Therefore, colour removal is the main goal throughout the process. In a conventional sugar refinery colour is removed in the purification and decolorisation steps – the second one is normally done using ion-exchange resins – but there are some other ways of colour removal such as adding some colour removing agents (powdered carbon, sodium bisulphite, PCC [precipitated calcium carbonate]). In this article the pilot plant results of experiments of increasing colour removal in the refining process are described, such as PCC addition, 3rd carbonatation (re-purification), hydrogen peroxide addition, powdered carbon addition, sodium bisulphite addition and crystallization improvements. The good results achieved in some of these trials led to perform some industrial trials, the results of wich are summarized in this article as well.

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