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recovery chromium from chromite ore

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US2381236A

Prior art keywords chromite chromium lime charge oxide Prior art date 1940-08-08 Legal status (The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation ....

US7220394B2

The present invention relates to a process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue (COPR) and more particularly, the present invention relates to an economical and environment-friendly ....

Extraction of Chromium from Chromite Ore

Chemical-grade chromite ore generally ranged from 40 to 46 pct Cr2O3 with a chromium-to-iron ratio of 15:1 to 2:1 Refractory-grade chromite ores contained a minimum of 20 pct Al2O3 and more than 60 pct Al2O3 plus Cr2O3 ....

US4311584A

Chromium values are recovered from pulverized chromite ore by agitating and aerating an aqueous pulp of said pulverized chromite ore containing an amine collector at a pulp acidity less than 25; and recovering a chromite containing ....

Recovery of Sodium Chromate from El

2 El-Tawil et al (1991)[4] reported that chromium recovery increased with temperature to yield a maximum at 1100 oC Stephen et al (1984)[5] illustrated that when chromite ore was roasted with 50% Na 2CO 3 at 750-900 oC for ....

How to Recover Chromite

The USBM conducted laboratory research including operating a nominal 100 lb/h pilot plant to demonstrate the recovery and concentration of chromite by gravity and flotation operations Gravity beneficiation test results show that ....