Abstract
Chromite ore is one of the essential raw materials for ferroalloy and steel industry. Boula-Nuasahi belt of Sukinda region, Odisha, is the only resource of chrome ore in India. The Indian deposits are typically characterized as ferruginous and siliceous type ores. Chrome ore is generally mined by open cast mechanized mining method in these areas. The run-off-mine (ROM) ore from the various mines is sent to beneficiation plant via stack yard for further up gradation. The chrome ore beneficiation plant (COB) has two major circuits: comminution (feed preparation) circuit and beneficiation circuit. In the comminution circuit, the ore is reduced to <1 mm size (for complete liberation of chromite) from -220 mm size in stage wise crushing (primary and secondary crusher) followed by screening and single stage grinding in a ball mill. Fraction having size <1 mm is further upgraded in the beneficiation circuit to produce three different concentrates having specific chemical composition and Cr: Fe ratio. The beneficiation plant is a complex circuit comprising of combination of unit operations (spiral concentrator, Floatex density separator, hydrocyclone, wet shaking tables). In the recent years the overall performance efficiency (grade and recovery) of the beneficiation circuit got affected with numerous changes in the run-off-mine ore quality (physical and chemical), mineralogical composition, etc. In this article, attempts made for improving the performance of chrome ore beneficiation circuit is discussed. The approach adopted and practical problems encountered while the process were also highlighted. The results of the trials has shown an improvement in the performance of the cyclone (d50: 56 µm – 40 µm) and chromite losses into tailing to <12%.
| Original language | English (US) |
|---|---|
| Title of host publication | IMPC 2016 - 28th International Mineral Processing Congress |
| Publisher | Canadian Institute of Mining, Metallurgy and Petroleum |
| ISBN (Electronic) | 9781926872292 |
| State | Published - 2016 |
| Externally published | Yes |
| Event | 28th International Mineral Processing Congress, IMPC 2016 - Quebec City, Canada Duration: Sep 11 2016 → Sep 15 2016 |
Publication series
| Name | IMPC 2016 - 28th International Mineral Processing Congress |
|---|---|
| Volume | 2016-September |
Conference
| Conference | 28th International Mineral Processing Congress, IMPC 2016 |
|---|---|
| Country/Territory | Canada |
| City | Quebec City |
| Period | 9/11/16 → 9/15/16 |
Bibliographical note
Publisher Copyright:© 2016 TAPPI Press. All rights reserved.
Keywords
- Chromite
- Data bank
- Gravity circuits
- Performance evaluation
