Novel Dual Cycle Combined Aluminium Dross Stirrer and Pressing System

新型双循环组合式铝渣搅拌器和压榨系统

• 批准号: 720749
• 金额: $ 31.86万
• 依托单位: ALTEK EUROPE LIMITED
• 依托单位国家: 英国
• 项目类别: GRD Development of Prototype
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=720749
• 关键词: Novel; Dual; Cycle; Combined; Aluminium

Aluminium (Al) due to its properties is the 2nd most used metal after iron (C KrammerAlHandbook 1999).Al dross represents a residue from primary & secondary Al production. Drosses are classifiedaccording to their metal contents. White dross is higher metal Al content & is produced fromprimary & secondary Al smelters. Black dross has a lower metal content & is generatedduring Al recycling (secondary industry sector). White dross may contain from 15% to 70%recoverable metallic Al & it comprises a fine powder from skimming the molten Al. Blackdross typically contains a 15% or less aluminium with a mixture of Al oxides & slag. (HwangJ Y et al 2006).Apart from Al metal, dross may also contain other chemical compounds eg Al203, AIN,Al4C3, MgF2, NaAlCl4, S102 MgO. With total global Al production at 62m tonnes (withclose to 26m tonnes from recycled) increase to around 97m tonnes (39m from recycled)(Organisation of European Al Recycling Industry 2013) by 2020.Approximately, up to 4 million tonnes of white dross & more than a million tonnes of blackdross are reported throughout the world each year, & around 95% of this material is landfilled(Journal of Minerals & Materials 2012 Vol 5).The problem for Al industry is to develop a means of recovering as much molten liquid fromAl from the dross whilst still in the hot form (830°C-900°C) on removal from the furnace.Secondary recyclers are no longer providing acceptable value in dross recovery. Only about40% of the metal recovery is passed on to the customer & is now common practice. In the FarEast & BRIC Countries, secondary recycling services are often not available. Altek haveidentified a unique dual cycle stirring/pressing process which could dramatically increase thelevel of Aluminium recovery on site.

铝（Al）由于其性质是仅次于铁的第二大使用金属（C KrammerAlHandbook 1999）A1浮渣代表来自初级和次级Al生产的残余物。浮渣按其金属含量分类。白色浮渣是金属铝含量较高的浮渣，由一次和二次铝冶炼厂生产。黑色浮渣的金属含量较低，在铝回收过程中产生（第二产业部门）。白色浮渣可含有15%至70%的可回收金属Al，并且其包括来自撇除熔融Al的细粉末。黑浮渣通常含有15%或更少的铝，以及Al氧化物和炉渣的混合物。除了Al金属之外，浮渣还可以含有其他化学化合物，例如Al 2 O3、AlN、Al 4C 3、MgF 2、NaAlCl 4、SiO2、MgO。全球铝总产量为6200万吨（其中回收的近2600万吨）增加到约9700万吨（39米回收）（Organisation of European Al Recycling Industry 2013）。据报道，全世界每年大约有多达400万吨的白色浮渣和超过100万吨的黑浮渣，大约95%的材料被填埋（Journal of Minerals & Materials 2012年12月5日）。铝工业的问题是开发一种方法，在铝仍处于热态时，从浮渣中回收尽可能多的熔融液体。二次再循环不再提供可接受的浮渣回收价值。只有大约40%的金属回收是传递给客户，现在是普遍的做法。在远东和金砖四国，通常没有二级回收服务。Altek已经确定了一种独特的双循环搅拌/挤压工艺，可以显著提高现场铝回收率。