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【共舞长江经济带】探访大冶有色稀贵金属厂绿色发展(图)
白银浇铸过程
国际在线报道(记者 章文君):7月6日,“共舞长江经济带——探访长江经济带区域协同生态发展之路”网络主题活动走进湖北黄石,近距离探访大冶有色稀贵金属厂,亲眼目睹了真金白银的浇铸全过程。
黄石位于长江中游南岸,湖北省东南部,拥有3000多年的冶炼史,被誉为“青铜古都”,现如今这里也是全国资源枯竭转型试点城市。成立于2006年12月的大冶金属厂是大冶有色金属集团发展循环经济的龙头单位,主要生产黄金、白银、铂等。
据金属厂大冶金属厂党委书记李春华介绍,我们在这里看到的黄金白银都是来自于冶炼厂的阳极泥。阳极泥是铜电解生产过程中生成的含有有价金属尾料,恰恰也是稀贵金属厂主要生产原料。白银的生产主要经过电解——熔化——浇铸三个过程。对电解产生的电银粉进行熔化,再浇铸成银锭。
白银熔化工艺中所需的原材料——电银粉
针对有色金属行业产能过剩、产业结构不合理的现状,大冶金属厂党委书记李春华表示,公司坚持实现工艺技术进步,节能减排绿色发展。2007年以前,从阳极中回收的贵金属仅有黄金、白银、海绵铂、海绵钯、粗硒、硫酸铜等。2007年,该厂先后成功开发出新产品二氧化硒、粗碲、铼酸铵等。通过开发新产品加大对原料综合利用,大冶金属厂产品种类由早期的7个增加至目前的11个。可以说大冶金属厂紧紧围绕“吃干榨尽“的目标,在提升产能的同时就在践行绿色发展。
作为一家有色金属单位,生产排污向来是备受关注的问题。对此,李春华介绍,大冶金属厂早已实现“零排放”,工厂的排放口都装备有环保在线监测系统,主要用于监测二氧化硫、氯气、氮气等气体,以及液体中的重金属,氮氧化物含量等指标。一旦指标超标,系统就会自动发生报警,同时将数据信号传输到市和省的环保部门,以便其及时作出监管处理。
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