共查询到20条相似文献,搜索用时 375 毫秒
1.
2.
3.
废旧铅蓄电池中铅的湿法回收 总被引:5,自引:0,他引:5
对废旧铅蓄电池采用分离-溶浸-电解工艺回收铅,可产出纯度为99.9%以上的铅,该工艺投资小,成本低,无环境污染,经济效益和社会效益显著,具有广泛的应用前景。 相似文献
4.
5.
随着近年来新能源汽车行业的飞速发展,锂离子电池退役报废量也日益增加,其回收处理技术受到越来越多的研究者关注。本文回顾总结了近些年来废旧锂离子电池的回收工艺方法,包括湿法工艺、火法工艺、联合工艺以及修复再生工艺等,其中火法-湿法相结合的联合工艺简单、高效,具有良好的产业化前景。 相似文献
6.
7.
8.
9.
10.
11.
由于湿法炼铅与传统的炼铅相比较有较明显的优点 ,湿法炼铅已成为研究者密切关注的焦点。本文综述了近年来国内湿法炼铅的研究现状 ,分析其发展趋势 ,介绍几种处于研究阶段的湿法炼铅技术 ,指出各自的特点、适用范围和存在的问题 ,并对湿法炼铅的应用前景作了展望 相似文献
12.
13.
14.
随着铅酸蓄电池在电子、能源、制造业等领域的广泛应用,由此产生大量的废铅酸蓄电池。废铅膏是废铅酸蓄电池的主要成分,因其含有大量铅化合物,如不合理处置,将会导致环境污染,而且也会造成铅资源浪费。废铅膏的规范处置及资源化利用是当前研究的热点,也是政府亟需解决的工业发展难题。对主流的废铅膏回收技术,包括火法、湿法和湿法+火法联合回收工艺进行总结和技术难点分析,并讨论生产过程主要污染源和污染物产排情况,其中火法熔炼产生的含硫废气、铅尘和废炉渣,湿法电解产生的废弃电解液等均具有环境危害性,需要重点管控。该论述以期为废铅膏资源化利用产业制定管理体系和环保标准提供参考依据。 相似文献
15.
16.
废弃负载型加氢处理催化剂是炼油工业中产生的固体废弃物,将其作为金属回收的原料,符合“减量化、再利用、资源化”的循环经济发展要求。本文综述了废弃加氢催化剂的金属回收利用技术,即废催化剂经过预处理去除烃类物质和结焦后,主要通过湿法或干法进行金属回收,得到一系列有价产品。湿法回收包括直接浸出法和碱性焙烧水浸法,目前碱性焙烧水浸法是被广泛研究的方法,此方法通过加入钠盐或钾盐同废催化剂混合焙烧后能显著提高某些金属在水中的溶解性,使后续的浸出过程更容易进行,缺点是对设备腐蚀性较大,易产生二次污染。本文还介绍了国内外主要废催化剂处理厂商对废催化剂金属回收的酸浸、碱浸、焙烧水浸、火法冶金等湿法及干法工艺,缩短湿法回收工艺流程以及降低干法回收能耗是今后废催化剂金属回收的发展方向。 相似文献
17.
本文研究了用多金属锑矿湿法生产锑白的矿渣制备三盐基硫酸铅的工艺.工艺过程为:饱和氯化钠溶液浸出—冷却结晶—硫酸沉淀转化—氢氧化钠溶液中和等,产品技术指标达到HG2340-2005一级品的要求.该工艺可实现铅资源的综合利用,节约能源,减少环境污染,具有一定的经济效益和社会效益. 相似文献
18.
Laurence P. James Wendi H. Cooksey Chief Metallurgist Maeng-Eon Park Kyu-Youl Sung 《Korean Journal of Chemical Engineering》2001,18(6):948-954
As ore grades drop at today’s large mines, and environmental regulations for waste discharges increase, economics drives new
recovery innovations. This paper describes some technological advances in the recovery processes for copper, gold, silver,
lead and zinc. It does not discuss pyrometallurgy. Korea, like many nations with industrial economies, consumes large amounts
of these metals, and is dependent on overseas suppliers for nearly its entire supply. This paper also discusses how technology
for recovery of metal now in Korea, for example from existing wastes, is important. Improved reagents for both leaching and
froth flotation of copper minerals, plus bio-oxidation and pressure autoclaving for gold have improved metal recovery. Copper
recovery by SX-EW is expanding rapidly, and the method is also commercial for zinc. Biooxidation of encapsulating waste materials
and, in some instances, of the desired metal has reached commercial scale. Pressure leaching on a large scale solves specific
problems for several metals. Improvements in gold and silver cyanidation include variants of activated carbon adsorption from
solution. Zinc and lead still largely depend on flotation for the treatment of ores. However, innovation in hydrometallurgical
extraction has been spurred by environmental concerns. Computer modeling and process control worldwide have likely led to
the largest improvements in recovery. The limited availability of land, clean water and sites for waste disposal in many countries
affects the economics of re-treatment of existing wastes. Some of the new technologies could be combined, for example in modular
plants that can be moved between reclamation sites to economic advantage on the Korean Peninsula.
Presented at the Int’l Symp. on Chem. Eng. (Cheju, Feb. 8-10, 2001), dedicated to Prof. H. S. Chun on the occasion of his
retirement from Korea University. 相似文献
19.