Treating waste with waste: Metals recovery from electroplating sludge using spent cathode carbon combustion dust and copper refining slag

冶金 浸出(土壤学) 冶炼 材料科学 烘烤 氧化剂 熔渣(焊接) 合金 电镀 废物管理 化学 环境科学 土壤水分 复合材料 有机化学 土壤科学 工程类 图层(电子)
作者
Yang Xiao,Lei Li,Manhong HUANG,Yanbiao Liu,Jingzhuang Xu,Zhipeng Xu,Yun Lei
出处
期刊:Science of The Total Environment [Elsevier]
卷期号:838: 156453-156453 被引量:26
标识
DOI:10.1016/j.scitotenv.2022.156453
摘要

Electroplating sludge is a hazardous waste and secondary metal resource because of its heavy metal content, which poses a huge threat to environmental safety if not properly disposed. An innovative process of oxidizing roasting followed by water leaching and smelting reduction to recover Cr, Cu, and Ni from electroplating sludge was proposed in this research, in which other two hazardous wastes of spent cathode carbon combustion dust and copper refining slag were co-treated. The NaF from spent cathode carbon combustion dust could convert Cr2O3 to Na2CrO4 using the oxidizing roasting process, resulting in a Cr recovery through the subsequent water leaching. The Na2CrO4 formation was promoted by CaO owing to it transferring the Cr spinel phase of FeCr2O4 [1+] to CaCrO4 and then to Na2CrO4. Under optimal conditions, the Cr recovery reached 97.1 %, and most 'F' was solidified into CaF2. In the next smelting reduction of the leaching residue, the Cu and Ni were recovered mainly in the form of Cu-Ni alloy. The addition of copper refining slag promoted their recovery, due to it modifying the molten slag and alloy structures and increasing the Cu-Ni alloy separation from molten slag. Some generated high-melting-point Cu-Ni-Fe and Ni-Fe alloys were converted to a Cu-Ni alloy with a low melting point in presence of Co from the copper refining slag, simultaneously with which the Fe was transferred out from Cu-Ni-Fe and Ni-Fe alloys and combined with Co to form a Fe-Co alloy. It increased Cu-Ni alloy droplets aggregation from molten slag and decreased their contents in the residual slag. Under optimized conditions, the Cu and Ni contents in the residual slag decreased to 0.37 and 0.06 wt%, respectively. Besides, the residual slag mainly composed of CaO, CaF2 and SiO2 could be used to prepare building materials rendering it harmless.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
小哪吒发布了新的文献求助10
1秒前
yyyy完成签到,获得积分10
2秒前
彭于晏应助balabala采纳,获得10
2秒前
2秒前
Dong完成签到,获得积分20
3秒前
4秒前
星辰大海应助lll采纳,获得10
4秒前
5秒前
徐丽完成签到,获得积分10
6秒前
balabala完成签到,获得积分10
6秒前
lang发布了新的文献求助10
8秒前
开心的水彤完成签到,获得积分10
8秒前
岁月浪翻了完成签到,获得积分10
9秒前
9秒前
10秒前
10秒前
11秒前
HL发布了新的文献求助10
11秒前
杜杜完成签到,获得积分10
11秒前
鲸海完成签到 ,获得积分10
11秒前
酷波er应助唐同学采纳,获得10
12秒前
12秒前
今后应助春夏秋冬采纳,获得10
13秒前
拼搏向前发布了新的文献求助10
13秒前
14秒前
yx阿聪发布了新的文献求助10
14秒前
Akim应助善良的迎夏采纳,获得10
15秒前
tt发布了新的文献求助30
16秒前
poohpooh发布了新的文献求助30
16秒前
17秒前
qsr发布了新的文献求助10
18秒前
18秒前
陈陈陈发布了新的文献求助30
19秒前
19秒前
123完成签到,获得积分10
19秒前
了晨发布了新的文献求助10
20秒前
20秒前
酷波er应助Yoh1220采纳,获得30
21秒前
酷炫翠桃完成签到,获得积分10
21秒前
太叔从蓉完成签到,获得积分10
21秒前
高分求助中
Sustainability in Tides Chemistry 2800
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
юрские динозавры восточного забайкалья 800
Foreign Policy of the French Second Empire: A Bibliography 500
Chen Hansheng: China’s Last Romantic Revolutionary 500
XAFS for Everyone 500
Classics in Total Synthesis IV 400
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3144274
求助须知:如何正确求助?哪些是违规求助? 2795879
关于积分的说明 7816861
捐赠科研通 2451946
什么是DOI,文献DOI怎么找? 1304774
科研通“疑难数据库(出版商)”最低求助积分说明 627291
版权声明 601419