Premium
Investigation of Efficient Conditions for Oxidative Roasting of Chromite Ore to Produce Potassium Chromate with KOH Additive
Author(s) -
Sun Zhi,
Zheng Shili,
Zhang Yi
Publication year - 2007
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200706251
Subject(s) - chromite , roasting , potassium chromate , chromate conversion coating , chromium , metallurgy , potassium , chemistry , residue (chemistry) , nuclear chemistry , materials science , biochemistry
A method of producing potassium Chromate directly from chromite ore and KOH was investigated. The chromium recovery was >90% after roasting at 800°C for 3 hours. The KOH‐to‐ore weight ratio was 1.2:1 and the ore‐to‐recycling residue weight ratio was 1:1. Production from the roasting process was easy to leach and about 100% of Chromate could be recovered through a treatment at 30°C for 30~40min with a water/solid ratio of 5:1. The obtained Chromate solution was purified by addition of conventional compounds.