The heavy metal gypsum is a hazardous solid waste, which is from the process of lead and zinc metallurgical industry. In this method, heavy metal gypsum and lead paste were used to synthesize PbS by pyrogenic attack. First synthesize CaS by the reducing of heavy metal gypsum that the pulverized coal was used as a reduction agent. Then the production CaS reacted with lead paste to synthesize PbS and the product CaO. The production PbS can be reused as raw materials for the process of lead metallurgical industry and CaO can be used to replace some slag forming constituents or smelting flux. The two-steps method reaction temperatures were 1173 K and 1073 K respectively in a protective atmosphere of nitrogen, wherein the second step was the rate-controlling step. In the final product, the percentage of lead was 70.89%, which exceeded the standard level of lead of industry standard for the nonferrous industry of China. At last, lead element was almost removed from waste gypsum as PbS, with some lead free about 4.5% which can be recycled in the dust catcher system. In this way, heavy metal gypsum can be recycled environmentally, economically and sustainably.
Journal of Cleaner Production – Elsevier
Published: May 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera