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- Title
Optimization of Comprehensive Recovery and Utilization Process of Cyanidation Tailings.
- Authors
LIU Quankun; GAO Peng; LIU Jie; ZHANG Shumin; DONG Zaizheng; YUAN Shuai; ZHAO Bing
- Abstract
In view of the adjustment of national environmental protection policy, the Ministry of Environmental Protection and other three ministries and commissions have designated "cyanidation takings produced in beneficiation using cyanide" as hazardous waste, and the new environmental protection tax law to be implemented will levy an environmental protection tax of 1 000 Yuan/t on hazardous waste. Economic digestion of cyanide waste is the main research topic and development detection of cyanidation plants in the future. Some cyanidation tailings in Shandong province contain lead, zinc and copper of certain grade. If the cyanidation tailings are not recycled, it will not only waste resources, but also pollute the environment. If this part of polymetals is recovered, good economic benefits will be produced. Recovery of valuable metal elements from cyanidation takings is different from that from raw ore, and it is difficult to recover valuable elements from cyanidation takings. In order to solve this problem, according to the properties of the takings, representative samples are taken, and a reasonable beneficiation process is proposed to recover the valuable metals in the takings. A preferential flotation process of floating lead and zinc first and then floating sulfur is adopted, which can achieve better recovery of valuable metals. The results show that under the conditions of 2.56 = Pb, 0.95=Zn and 0.19=Cu in the raw ore, a Pb-Zn concentrate wkh Pb grade 19.77%, Pb recovery 21.50%, Zn grade 19.69%, Zn recovery 71.07% and Cu content 1.43%, and a sulfur concentrate with sulfur grade 45.27% and sulfur recovery 35.92% can be obtained by adopting the flotation process of one roughing, two cleanings and two scavengings. The new process has better process indexes, lower reagent cost and simper process. Not only lead and zinc in lead-zinc concentrate are effectively recovered, but also the associated sulfur recover is improved, which provides a scheme for the recovery of lead, zinc, copper and sulfur in cyanidation tailings.
- Subjects
SHANDONG Sheng (China); LEAD; ENVIRONMENTAL impact charges; HAZARDOUS wastes; ENVIRONMENTAL protection; SULFUR; ENVIRONMENTAL policy; COPPER
- Publication
Nonferrous Metals (Mineral Processing Section), 2024, Issue 5, p127
- ISSN
1671-9492
- Publication type
Article
- DOI
10.3969/j.issn.1671-9492.2024.05.014