4.6 Article

Enrichment Characteristics of Cr in Chromium Slag after Pre-Reduction and Melting/Magnetic Separation Treatment

Journal

MATERIALS
Volume 14, Issue 17, Pages -

Publisher

MDPI
DOI: 10.3390/ma14174937

Keywords

chromium slag; chromium-iron ratio; pre-reduction; melting separation; magnetic separation

Funding

  1. Natural Science Foundation of Jiangsu Province [BK20200869]
  2. China Postdoctoral Science Foundation [7114484320]

Ask authors/readers for more resources

This study found that using melting separation process can result in higher alloy yield, iron recovery rate, and chromium content in the alloy when dealing with chromium slag. On the other hand, a lower pre-reduction temperature and magnetic separation process were found to be more beneficial for improving the chromium-iron ratio in the slag.
Concentrating the chromium in chromium slag and improving the chromium-iron ratio is beneficial for the further utilization of chromium slag. In this paper, chromium slag obtained from a chromite lime-free roasting plant was used as the raw material. Pellets made of the chromium slag and pulverized coal were reduced at different pre-reduction temperatures and then separated by a melting separation process or magnetic separation process, respectively. The mass and composition of the metallized pellets before separation, along with the alloy and tail slag after separation, were comprehensively analyzed. The experimental results showed that the output yield of alloy, iron recovery rate, and chromium content in the alloy were all higher when using melting separation than when using magnetic separation, because of the further reduction during the melting stage. More importantly, a relatively low pre-reduction temperature and selection of magnetic separation process were found to be more beneficial for chromium enrichment in slag; the highest chromium-iron ratio in tail slag can reach 2.88.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available