A new process for silver recovery from all types of X-ray film that is more effective and far more energy efficient than current processes

从所有类型的 X 射线胶片中回收银的新工艺，比现有工艺更有效且能源效率更高

• 批准号: 710515
• 金额: $ 12.62万
• 依托单位: BULLION TECH LTD
• 依托单位国家: 英国
• 项目类别: GRD Proof of Concept
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=710515
• 关键词: new; process; silver; recovery; types

Many waste management companies and their customers are not aware of the true value ofcertain waste streams. Medical and industrial X-ray films, printed circuit boards, industrialwastes and many other ‘wastes’ contain small amounts of precious metals. While manyorganisations separate cardboard, glass and cans for recycling, yet higher value materials areoften disposed of as hazardous waste because there is a lack of understanding as to how toidentify these precious metal waste streams or there is a lack of scientific knowledge and sorecycling these materials seems too complicated.A prime example of this is X-ray film, which contains silver (Ag). Several major industrieshave stockpiled large quantities of this film. The medical industry keeps most films forbetween 7 and 30 years. The defence, marine, oil/gas & aerospace industries have thousandsof tonnes of x-ray film taken as part of the Non-Destructive Testing (NDT) quality control ofwelds and cast parts in ships, submarines, tanks, aircraft, helicopters, oil rigs, pipelines,refineries and many other applications. Film is kept for the life of the equipment, but often liesforgotten in large storage facilities.We have invented a novel hydro-chemistry process to remove silver from traditional & dryview film at the same time. Further research will allow us to explore the novel process moreclosely, and we believe that the technology could be refined to treat most if not all dry filmtypes, while recovering virtually ALL the silver (99+%), with very low energy consumption,especially compared to incineration.The benefits of the proposed process v. existing pyrolysis process are:• Recovery of an estimated 99% of silver• An estimated 90% saving in energy cost• 98% cut in the carbon footprint• Country of origin can retain control of metal recovered• NHS, Defence, Aerospace, Marine, Offshore industries can recover value from film• Recovery of high grade PET film worth £250 to £500/te.

许多废物管理公司及其客户并没有意识到某些废物流的真正价值。医疗和工业 X 射线胶片、印刷电路板、工业废物和许多其他“废物”都含有少量的贵金属。虽然许多组织将纸板、玻璃和罐头分开进行回收，但较高价值的材料通常被作为危险废物处理，因为人们对如何识别这些贵金属废物流缺乏了解，或者缺乏科学知识，因此回收这些材料似乎过于复杂。一个典型的例子是含有银 (Ag) 的 X 射线胶片。几大行业都大量储备了这种薄膜。医疗行业将大多数胶片保存 7 到 30 年。国防、海洋、石油/天然气和航空航天工业拥有数千吨 X 射线胶片，作为船舶、潜艇、坦克、飞机、直升机、石油钻井平台、管道、炼油厂和许多其他应用中的焊缝和铸件的无损检测 (NDT) 质量控制的一部分。胶片在设备的使用寿命内得到保存，但经常被遗忘在大型存储设施中。我们发明了一种新颖的水化学工艺，可以同时从传统胶片和干式胶片中去除银。进一步的研究将使我们能够更仔细地探索新工艺，我们相信，该技术可以改进以处理大多数（如果不是全部）干膜类型，同时回收几乎所有的银（99+％），能耗非常低，特别是与焚烧相比。所提出的工艺相对于现有热解工艺的优点是：• 回收估计 99% 的银• 估计节省 90% 的能源成本• 减少 98% 的碳排放 足迹• 原产国可以保留对回收金属的控制• NHS、国防、航空航天、海洋、近海工业可以从薄膜中回收价值• 回收价值250 至500 英镑/吨的高级PET 薄膜。